drivers/net/wireless/intel/iwlegacy/3945-mac.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   5  *
   6  * Portions of this file are derived from the ipw3945 project, as well
   7  * as portions of the ieee80211 subsystem header files.
   8  *
   9  * Contact Information:
  10  *  Intel Linux Wireless <ilw@linux.intel.com>
  11  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  12  *
  13  *****************************************************************************/
  14
  15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  16
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/pci.h>
  21 #include <linux/slab.h>
  22 #include <linux/dma-mapping.h>
  23 #include <linux/delay.h>
  24 #include <linux/sched.h>
  25 #include <linux/skbuff.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/firmware.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/if_arp.h>
  30
  31 #include <net/ieee80211_radiotap.h>
  32 #include <net/mac80211.h>
  33
  34 #include <asm/div64.h>
  35
  36 #define DRV_NAME        "iwl3945"
  37
  38 #include "commands.h"
  39 #include "common.h"
  40 #include "3945.h"
  41 #include "iwl-spectrum.h"
  42
  43 /*
  44  * module name, copyright, version, etc.
  45  */
  46
  47 #define DRV_DESCRIPTION \
  48 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  49
  50 #ifdef CONFIG_IWLEGACY_DEBUG
  51 #define VD "d"
  52 #else
  53 #define VD
  54 #endif
  55
  56 /*
  57  * add "s" to indicate spectrum measurement included.
  58  * we add it here to be consistent with previous releases in which
  59  * this was configurable.
  60  */
  61 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  62 #define DRV_COPYRIGHT   "Copyright(c) 2003-2011 Intel Corporation"
  63 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  64
  65 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  66 MODULE_VERSION(DRV_VERSION);
  67 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  68 MODULE_LICENSE("GPL");
  69
  70  /* module parameters */
  71 struct il_mod_params il3945_mod_params = {
  72         .sw_crypto = 1,
  73         .restart_fw = 1,
  74         .disable_hw_scan = 1,
  75         /* the rest are 0 by default */
  76 };
  77
  78 /**
  79  * il3945_get_antenna_flags - Get antenna flags for RXON command
  80  * @il: eeprom and antenna fields are used to determine antenna flags
  81  *
  82  * il->eeprom39  is used to determine if antenna AUX/MAIN are reversed
  83  * il3945_mod_params.antenna specifies the antenna diversity mode:
  84  *
  85  * IL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
  86  * IL_ANTENNA_MAIN      - Force MAIN antenna
  87  * IL_ANTENNA_AUX       - Force AUX antenna
  88  */
  89 __le32
  90 il3945_get_antenna_flags(const struct il_priv *il)
  91 {
  92         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
  93
  94         switch (il3945_mod_params.antenna) {
  95         case IL_ANTENNA_DIVERSITY:
  96                 return 0;
  97
  98         case IL_ANTENNA_MAIN:
  99                 if (eeprom->antenna_switch_type)
 100                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 101                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 102
 103         case IL_ANTENNA_AUX:
 104                 if (eeprom->antenna_switch_type)
 105                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 106                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 107         }
 108
 109         /* bad antenna selector value */
 110         IL_ERR("Bad antenna selector value (0x%x)\n",
 111                il3945_mod_params.antenna);
 112
 113         return 0;               /* "diversity" is default if error */
 114 }
 115
 116 static int
 117 il3945_set_ccmp_dynamic_key_info(struct il_priv *il,
 118                                  struct ieee80211_key_conf *keyconf, u8 sta_id)
 119 {
 120         unsigned long flags;
 121         __le16 key_flags = 0;
 122         int ret;
 123
 124         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 125         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 126
 127         if (sta_id == il->hw_params.bcast_id)
 128                 key_flags |= STA_KEY_MULTICAST_MSK;
 129
 130         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 131         keyconf->hw_key_idx = keyconf->keyidx;
 132         key_flags &= ~STA_KEY_FLG_INVALID;
 133
 134         spin_lock_irqsave(&il->sta_lock, flags);
 135         il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 136         il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 137         memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
 138
 139         memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen);
 140
 141         if ((il->stations[sta_id].sta.key.
 142              key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
 143                 il->stations[sta_id].sta.key.key_offset =
 144                     il_get_free_ucode_key_idx(il);
 145         /* else, we are overriding an existing key => no need to allocated room
 146          * in uCode. */
 147
 148         WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 149              "no space for a new key");
 150
 151         il->stations[sta_id].sta.key.key_flags = key_flags;
 152         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 153         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 154
 155         D_INFO("hwcrypto: modify ucode station key info\n");
 156
 157         ret = il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
 158
 159         spin_unlock_irqrestore(&il->sta_lock, flags);
 160
 161         return ret;
 162 }
 163
 164 static int
 165 il3945_set_tkip_dynamic_key_info(struct il_priv *il,
 166                                  struct ieee80211_key_conf *keyconf, u8 sta_id)
 167 {
 168         return -EOPNOTSUPP;
 169 }
 170
 171 static int
 172 il3945_set_wep_dynamic_key_info(struct il_priv *il,
 173                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 174 {
 175         return -EOPNOTSUPP;
 176 }
 177
 178 static int
 179 il3945_clear_sta_key_info(struct il_priv *il, u8 sta_id)
 180 {
 181         unsigned long flags;
 182         struct il_addsta_cmd sta_cmd;
 183
 184         spin_lock_irqsave(&il->sta_lock, flags);
 185         memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
 186         memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo));
 187         il->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 188         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 189         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 190         memcpy(&sta_cmd, &il->stations[sta_id].sta,
 191                sizeof(struct il_addsta_cmd));
 192         spin_unlock_irqrestore(&il->sta_lock, flags);
 193
 194         D_INFO("hwcrypto: clear ucode station key info\n");
 195         return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
 196 }
 197
 198 static int
 199 il3945_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
 200                        u8 sta_id)
 201 {
 202         int ret = 0;
 203
 204         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 205
 206         switch (keyconf->cipher) {
 207         case WLAN_CIPHER_SUITE_CCMP:
 208                 ret = il3945_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
 209                 break;
 210         case WLAN_CIPHER_SUITE_TKIP:
 211                 ret = il3945_set_tkip_dynamic_key_info(il, keyconf, sta_id);
 212                 break;
 213         case WLAN_CIPHER_SUITE_WEP40:
 214         case WLAN_CIPHER_SUITE_WEP104:
 215                 ret = il3945_set_wep_dynamic_key_info(il, keyconf, sta_id);
 216                 break;
 217         default:
 218                 IL_ERR("Unknown alg: %s alg=%x\n", __func__, keyconf->cipher);
 219                 ret = -EINVAL;
 220         }
 221
 222         D_WEP("Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
 223               keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret);
 224
 225         return ret;
 226 }
 227
 228 static int
 229 il3945_remove_static_key(struct il_priv *il)
 230 {
 231         return -EOPNOTSUPP;
 232 }
 233
 234 static int
 235 il3945_set_static_key(struct il_priv *il, struct ieee80211_key_conf *key)
 236 {
 237         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 238             key->cipher == WLAN_CIPHER_SUITE_WEP104)
 239                 return -EOPNOTSUPP;
 240
 241         IL_ERR("Static key invalid: cipher %x\n", key->cipher);
 242         return -EINVAL;
 243 }
 244
 245 static void
 246 il3945_clear_free_frames(struct il_priv *il)
 247 {
 248         struct list_head *element;
 249
 250         D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
 251
 252         while (!list_empty(&il->free_frames)) {
 253                 element = il->free_frames.next;
 254                 list_del(element);
 255                 kfree(list_entry(element, struct il3945_frame, list));
 256                 il->frames_count--;
 257         }
 258
 259         if (il->frames_count) {
 260                 IL_WARN("%d frames still in use.  Did we lose one?\n",
 261                         il->frames_count);
 262                 il->frames_count = 0;
 263         }
 264 }
 265
 266 static struct il3945_frame *
 267 il3945_get_free_frame(struct il_priv *il)
 268 {
 269         struct il3945_frame *frame;
 270         struct list_head *element;
 271         if (list_empty(&il->free_frames)) {
 272                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 273                 if (!frame) {
 274                         IL_ERR("Could not allocate frame!\n");
 275                         return NULL;
 276                 }
 277
 278                 il->frames_count++;
 279                 return frame;
 280         }
 281
 282         element = il->free_frames.next;
 283         list_del(element);
 284         return list_entry(element, struct il3945_frame, list);
 285 }
 286
 287 static void
 288 il3945_free_frame(struct il_priv *il, struct il3945_frame *frame)
 289 {
 290         memset(frame, 0, sizeof(*frame));
 291         list_add(&frame->list, &il->free_frames);
 292 }
 293
 294 unsigned int
 295 il3945_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
 296                          int left)
 297 {
 298
 299         if (!il_is_associated(il) || !il->beacon_skb)
 300                 return 0;
 301
 302         if (il->beacon_skb->len > left)
 303                 return 0;
 304
 305         memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
 306
 307         return il->beacon_skb->len;
 308 }
 309
 310 static int
 311 il3945_send_beacon_cmd(struct il_priv *il)
 312 {
 313         struct il3945_frame *frame;
 314         unsigned int frame_size;
 315         int rc;
 316         u8 rate;
 317
 318         frame = il3945_get_free_frame(il);
 319
 320         if (!frame) {
 321                 IL_ERR("Could not obtain free frame buffer for beacon "
 322                        "command.\n");
 323                 return -ENOMEM;
 324         }
 325
 326         rate = il_get_lowest_plcp(il);
 327
 328         frame_size = il3945_hw_get_beacon_cmd(il, frame, rate);
 329
 330         rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
 331
 332         il3945_free_frame(il, frame);
 333
 334         return rc;
 335 }
 336
 337 static void
 338 il3945_unset_hw_params(struct il_priv *il)
 339 {
 340         if (il->_3945.shared_virt)
 341                 dma_free_coherent(&il->pci_dev->dev,
 342                                   sizeof(struct il3945_shared),
 343                                   il->_3945.shared_virt, il->_3945.shared_phys);
 344 }
 345
 346 static void
 347 il3945_build_tx_cmd_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
 348                              struct il_device_cmd *cmd,
 349                              struct sk_buff *skb_frag, int sta_id)
 350 {
 351         struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 352         struct il_hw_key *keyinfo = &il->stations[sta_id].keyinfo;
 353
 354         tx_cmd->sec_ctl = 0;
 355
 356         switch (keyinfo->cipher) {
 357         case WLAN_CIPHER_SUITE_CCMP:
 358                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 359                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 360                 D_TX("tx_cmd with AES hwcrypto\n");
 361                 break;
 362
 363         case WLAN_CIPHER_SUITE_TKIP:
 364                 break;
 365
 366         case WLAN_CIPHER_SUITE_WEP104:
 367                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 368                 /* fall through */
 369         case WLAN_CIPHER_SUITE_WEP40:
 370                 tx_cmd->sec_ctl |=
 371                     TX_CMD_SEC_WEP | (info->control.hw_key->
 372                                       hw_key_idx & TX_CMD_SEC_MSK) <<
 373                     TX_CMD_SEC_SHIFT;
 374
 375                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 376
 377                 D_TX("Configuring packet for WEP encryption " "with key %d\n",
 378                      info->control.hw_key->hw_key_idx);
 379                 break;
 380
 381         default:
 382                 IL_ERR("Unknown encode cipher %x\n", keyinfo->cipher);
 383                 break;
 384         }
 385 }
 386
 387 /*
 388  * handle build C_TX command notification.
 389  */
 390 static void
 391 il3945_build_tx_cmd_basic(struct il_priv *il, struct il_device_cmd *cmd,
 392                           struct ieee80211_tx_info *info,
 393                           struct ieee80211_hdr *hdr, u8 std_id)
 394 {
 395         struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 396         __le32 tx_flags = tx_cmd->tx_flags;
 397         __le16 fc = hdr->frame_control;
 398
 399         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 400         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 401                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 402                 if (ieee80211_is_mgmt(fc))
 403                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 404                 if (ieee80211_is_probe_resp(fc) &&
 405                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 406                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 407         } else {
 408                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 409                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 410         }
 411
 412         tx_cmd->sta_id = std_id;
 413         if (ieee80211_has_morefrags(fc))
 414                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 415
 416         if (ieee80211_is_data_qos(fc)) {
 417                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 418                 tx_cmd->tid_tspec = qc[0] & 0xf;
 419                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 420         } else {
 421                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 422         }
 423
 424         il_tx_cmd_protection(il, info, fc, &tx_flags);
 425
 426         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 427         if (ieee80211_is_mgmt(fc)) {
 428                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 429                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 430                 else
 431                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 432         } else {
 433                 tx_cmd->timeout.pm_frame_timeout = 0;
 434         }
 435
 436         tx_cmd->driver_txop = 0;
 437         tx_cmd->tx_flags = tx_flags;
 438         tx_cmd->next_frame_len = 0;
 439 }
 440
 441 /*
 442  * start C_TX command process
 443  */
 444 static int
 445 il3945_tx_skb(struct il_priv *il,
 446               struct ieee80211_sta *sta,
 447               struct sk_buff *skb)
 448 {
 449         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 450         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 451         struct il3945_tx_cmd *tx_cmd;
 452         struct il_tx_queue *txq = NULL;
 453         struct il_queue *q = NULL;
 454         struct il_device_cmd *out_cmd;
 455         struct il_cmd_meta *out_meta;
 456         dma_addr_t phys_addr;
 457         dma_addr_t txcmd_phys;
 458         int txq_id = skb_get_queue_mapping(skb);
 459         u16 len, idx, hdr_len;
 460         u16 firstlen, secondlen;
 461         u8 sta_id;
 462         u8 tid = 0;
 463         __le16 fc;
 464         u8 wait_write_ptr = 0;
 465         unsigned long flags;
 466
 467         spin_lock_irqsave(&il->lock, flags);
 468         if (il_is_rfkill(il)) {
 469                 D_DROP("Dropping - RF KILL\n");
 470                 goto drop_unlock;
 471         }
 472
 473         if ((ieee80211_get_tx_rate(il->hw, info)->hw_value & 0xFF) ==
 474             IL_INVALID_RATE) {
 475                 IL_ERR("ERROR: No TX rate available.\n");
 476                 goto drop_unlock;
 477         }
 478
 479         fc = hdr->frame_control;
 480
 481 #ifdef CONFIG_IWLEGACY_DEBUG
 482         if (ieee80211_is_auth(fc))
 483                 D_TX("Sending AUTH frame\n");
 484         else if (ieee80211_is_assoc_req(fc))
 485                 D_TX("Sending ASSOC frame\n");
 486         else if (ieee80211_is_reassoc_req(fc))
 487                 D_TX("Sending REASSOC frame\n");
 488 #endif
 489
 490         spin_unlock_irqrestore(&il->lock, flags);
 491
 492         hdr_len = ieee80211_hdrlen(fc);
 493
 494         /* Find idx into station table for destination station */
 495         sta_id = il_sta_id_or_broadcast(il, sta);
 496         if (sta_id == IL_INVALID_STATION) {
 497                 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
 498                 goto drop;
 499         }
 500
 501         D_RATE("station Id %d\n", sta_id);
 502
 503         if (ieee80211_is_data_qos(fc)) {
 504                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 505                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 506                 if (unlikely(tid >= MAX_TID_COUNT))
 507                         goto drop;
 508         }
 509
 510         /* Descriptor for chosen Tx queue */
 511         txq = &il->txq[txq_id];
 512         q = &txq->q;
 513
 514         if ((il_queue_space(q) < q->high_mark))
 515                 goto drop;
 516
 517         spin_lock_irqsave(&il->lock, flags);
 518
 519         idx = il_get_cmd_idx(q, q->write_ptr, 0);
 520
 521         txq->skbs[q->write_ptr] = skb;
 522
 523         /* Init first empty entry in queue's array of Tx/cmd buffers */
 524         out_cmd = txq->cmd[idx];
 525         out_meta = &txq->meta[idx];
 526         tx_cmd = (struct il3945_tx_cmd *)out_cmd->cmd.payload;
 527         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 528         memset(tx_cmd, 0, sizeof(*tx_cmd));
 529
 530         /*
 531          * Set up the Tx-command (not MAC!) header.
 532          * Store the chosen Tx queue and TFD idx within the sequence field;
 533          * after Tx, uCode's Tx response will return this value so driver can
 534          * locate the frame within the tx queue and do post-tx processing.
 535          */
 536         out_cmd->hdr.cmd = C_TX;
 537         out_cmd->hdr.sequence =
 538             cpu_to_le16((u16)
 539                         (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
 540
 541         /* Copy MAC header from skb into command buffer */
 542         memcpy(tx_cmd->hdr, hdr, hdr_len);
 543
 544         if (info->control.hw_key)
 545                 il3945_build_tx_cmd_hwcrypto(il, info, out_cmd, skb, sta_id);
 546
 547         /* TODO need this for burst mode later on */
 548         il3945_build_tx_cmd_basic(il, out_cmd, info, hdr, sta_id);
 549
 550         il3945_hw_build_tx_cmd_rate(il, out_cmd, info, hdr, sta_id);
 551
 552         /* Total # bytes to be transmitted */
 553         tx_cmd->len = cpu_to_le16((u16) skb->len);
 554
 555         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 556         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 557
 558         /*
 559          * Use the first empty entry in this queue's command buffer array
 560          * to contain the Tx command and MAC header concatenated together
 561          * (payload data will be in another buffer).
 562          * Size of this varies, due to varying MAC header length.
 563          * If end is not dword aligned, we'll have 2 extra bytes at the end
 564          * of the MAC header (device reads on dword boundaries).
 565          * We'll tell device about this padding later.
 566          */
 567         len =
 568             sizeof(struct il3945_tx_cmd) + sizeof(struct il_cmd_header) +
 569             hdr_len;
 570         firstlen = (len + 3) & ~3;
 571
 572         /* Physical address of this Tx command's header (not MAC header!),
 573          * within command buffer array. */
 574         txcmd_phys =
 575             pci_map_single(il->pci_dev, &out_cmd->hdr, firstlen,
 576                            PCI_DMA_TODEVICE);
 577         if (unlikely(pci_dma_mapping_error(il->pci_dev, txcmd_phys)))
 578                 goto drop_unlock;
 579
 580         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 581          * if any (802.11 null frames have no payload). */
 582         secondlen = skb->len - hdr_len;
 583         if (secondlen > 0) {
 584                 phys_addr =
 585                     pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen,
 586                                    PCI_DMA_TODEVICE);
 587                 if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr)))
 588                         goto drop_unlock;
 589         }
 590
 591         /* Add buffer containing Tx command and MAC(!) header to TFD's
 592          * first entry */
 593         il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
 594         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 595         dma_unmap_len_set(out_meta, len, firstlen);
 596         if (secondlen > 0)
 597                 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 0,
 598                                                U32_PAD(secondlen));
 599
 600         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 601                 txq->need_update = 1;
 602         } else {
 603                 wait_write_ptr = 1;
 604                 txq->need_update = 0;
 605         }
 606
 607         il_update_stats(il, true, fc, skb->len);
 608
 609         D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
 610         D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 611         il_print_hex_dump(il, IL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 612         il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr,
 613                           ieee80211_hdrlen(fc));
 614
 615         /* Tell device the write idx *just past* this latest filled TFD */
 616         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
 617         il_txq_update_write_ptr(il, txq);
 618         spin_unlock_irqrestore(&il->lock, flags);
 619
 620         if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
 621                 if (wait_write_ptr) {
 622                         spin_lock_irqsave(&il->lock, flags);
 623                         txq->need_update = 1;
 624                         il_txq_update_write_ptr(il, txq);
 625                         spin_unlock_irqrestore(&il->lock, flags);
 626                 }
 627
 628                 il_stop_queue(il, txq);
 629         }
 630
 631         return 0;
 632
 633 drop_unlock:
 634         spin_unlock_irqrestore(&il->lock, flags);
 635 drop:
 636         return -1;
 637 }
 638
 639 static int
 640 il3945_get_measurement(struct il_priv *il,
 641                        struct ieee80211_measurement_params *params, u8 type)
 642 {
 643         struct il_spectrum_cmd spectrum;
 644         struct il_rx_pkt *pkt;
 645         struct il_host_cmd cmd = {
 646                 .id = C_SPECTRUM_MEASUREMENT,
 647                 .data = (void *)&spectrum,
 648                 .flags = CMD_WANT_SKB,
 649         };
 650         u32 add_time = le64_to_cpu(params->start_time);
 651         int rc;
 652         int spectrum_resp_status;
 653         int duration = le16_to_cpu(params->duration);
 654
 655         if (il_is_associated(il))
 656                 add_time =
 657                     il_usecs_to_beacons(il,
 658                                         le64_to_cpu(params->start_time) -
 659                                         il->_3945.last_tsf,
 660                                         le16_to_cpu(il->timing.beacon_interval));
 661
 662         memset(&spectrum, 0, sizeof(spectrum));
 663
 664         spectrum.channel_count = cpu_to_le16(1);
 665         spectrum.flags =
 666             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 667         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 668         cmd.len = sizeof(spectrum);
 669         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 670
 671         if (il_is_associated(il))
 672                 spectrum.start_time =
 673                     il_add_beacon_time(il, il->_3945.last_beacon_time, add_time,
 674                                        le16_to_cpu(il->timing.beacon_interval));
 675         else
 676                 spectrum.start_time = 0;
 677
 678         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 679         spectrum.channels[0].channel = params->channel;
 680         spectrum.channels[0].type = type;
 681         if (il->active.flags & RXON_FLG_BAND_24G_MSK)
 682                 spectrum.flags |=
 683                     RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
 684                     RXON_FLG_TGG_PROTECT_MSK;
 685
 686         rc = il_send_cmd_sync(il, &cmd);
 687         if (rc)
 688                 return rc;
 689
 690         pkt = (struct il_rx_pkt *)cmd.reply_page;
 691         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 692                 IL_ERR("Bad return from N_RX_ON_ASSOC command\n");
 693                 rc = -EIO;
 694         }
 695
 696         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 697         switch (spectrum_resp_status) {
 698         case 0:         /* Command will be handled */
 699                 if (pkt->u.spectrum.id != 0xff) {
 700                         D_INFO("Replaced existing measurement: %d\n",
 701                                pkt->u.spectrum.id);
 702                         il->measurement_status &= ~MEASUREMENT_READY;
 703                 }
 704                 il->measurement_status |= MEASUREMENT_ACTIVE;
 705                 rc = 0;
 706                 break;
 707
 708         case 1:         /* Command will not be handled */
 709                 rc = -EAGAIN;
 710                 break;
 711         }
 712
 713         il_free_pages(il, cmd.reply_page);
 714
 715         return rc;
 716 }
 717
 718 static void
 719 il3945_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
 720 {
 721         struct il_rx_pkt *pkt = rxb_addr(rxb);
 722         struct il_alive_resp *palive;
 723         struct delayed_work *pwork;
 724
 725         palive = &pkt->u.alive_frame;
 726
 727         D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
 728                palive->is_valid, palive->ver_type, palive->ver_subtype);
 729
 730         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 731                 D_INFO("Initialization Alive received.\n");
 732                 memcpy(&il->card_alive_init, &pkt->u.alive_frame,
 733                        sizeof(struct il_alive_resp));
 734                 pwork = &il->init_alive_start;
 735         } else {
 736                 D_INFO("Runtime Alive received.\n");
 737                 memcpy(&il->card_alive, &pkt->u.alive_frame,
 738                        sizeof(struct il_alive_resp));
 739                 pwork = &il->alive_start;
 740                 il3945_disable_events(il);
 741         }
 742
 743         /* We delay the ALIVE response by 5ms to
 744          * give the HW RF Kill time to activate... */
 745         if (palive->is_valid == UCODE_VALID_OK)
 746                 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
 747         else
 748                 IL_WARN("uCode did not respond OK.\n");
 749 }
 750
 751 static void
 752 il3945_hdl_add_sta(struct il_priv *il, struct il_rx_buf *rxb)
 753 {
 754 #ifdef CONFIG_IWLEGACY_DEBUG
 755         struct il_rx_pkt *pkt = rxb_addr(rxb);
 756 #endif
 757
 758         D_RX("Received C_ADD_STA: 0x%02X\n", pkt->u.status);
 759 }
 760
 761 static void
 762 il3945_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
 763 {
 764         struct il_rx_pkt *pkt = rxb_addr(rxb);
 765         struct il3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 766 #ifdef CONFIG_IWLEGACY_DEBUG
 767         u8 rate = beacon->beacon_notify_hdr.rate;
 768
 769         D_RX("beacon status %x retries %d iss %d " "tsf %d %d rate %d\n",
 770              le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 771              beacon->beacon_notify_hdr.failure_frame,
 772              le32_to_cpu(beacon->ibss_mgr_status),
 773              le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
 774 #endif
 775
 776         il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 777
 778 }
 779
 780 /* Handle notification from uCode that card's power state is changing
 781  * due to software, hardware, or critical temperature RFKILL */
 782 static void
 783 il3945_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
 784 {
 785         struct il_rx_pkt *pkt = rxb_addr(rxb);
 786         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 787         unsigned long status = il->status;
 788
 789         IL_WARN("Card state received: HW:%s SW:%s\n",
 790                 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 791                 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 792
 793         _il_wr(il, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 794
 795         if (flags & HW_CARD_DISABLED)
 796                 set_bit(S_RFKILL, &il->status);
 797         else
 798                 clear_bit(S_RFKILL, &il->status);
 799
 800         il_scan_cancel(il);
 801
 802         if ((test_bit(S_RFKILL, &status) !=
 803              test_bit(S_RFKILL, &il->status)))
 804                 wiphy_rfkill_set_hw_state(il->hw->wiphy,
 805                                           test_bit(S_RFKILL, &il->status));
 806         else
 807                 wake_up(&il->wait_command_queue);
 808 }
 809
 810 /**
 811  * il3945_setup_handlers - Initialize Rx handler callbacks
 812  *
 813  * Setup the RX handlers for each of the reply types sent from the uCode
 814  * to the host.
 815  *
 816  * This function chains into the hardware specific files for them to setup
 817  * any hardware specific handlers as well.
 818  */
 819 static void
 820 il3945_setup_handlers(struct il_priv *il)
 821 {
 822         il->handlers[N_ALIVE] = il3945_hdl_alive;
 823         il->handlers[C_ADD_STA] = il3945_hdl_add_sta;
 824         il->handlers[N_ERROR] = il_hdl_error;
 825         il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
 826         il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
 827         il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
 828         il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
 829         il->handlers[N_BEACON] = il3945_hdl_beacon;
 830
 831         /*
 832          * The same handler is used for both the REPLY to a discrete
 833          * stats request from the host as well as for the periodic
 834          * stats notifications (after received beacons) from the uCode.
 835          */
 836         il->handlers[C_STATS] = il3945_hdl_c_stats;
 837         il->handlers[N_STATS] = il3945_hdl_stats;
 838
 839         il_setup_rx_scan_handlers(il);
 840         il->handlers[N_CARD_STATE] = il3945_hdl_card_state;
 841
 842         /* Set up hardware specific Rx handlers */
 843         il3945_hw_handler_setup(il);
 844 }
 845
 846 /************************** RX-FUNCTIONS ****************************/
 847 /*
 848  * Rx theory of operation
 849  *
 850  * The host allocates 32 DMA target addresses and passes the host address
 851  * to the firmware at register IL_RFDS_TBL_LOWER + N * RFD_SIZE where N is
 852  * 0 to 31
 853  *
 854  * Rx Queue Indexes
 855  * The host/firmware share two idx registers for managing the Rx buffers.
 856  *
 857  * The READ idx maps to the first position that the firmware may be writing
 858  * to -- the driver can read up to (but not including) this position and get
 859  * good data.
 860  * The READ idx is managed by the firmware once the card is enabled.
 861  *
 862  * The WRITE idx maps to the last position the driver has read from -- the
 863  * position preceding WRITE is the last slot the firmware can place a packet.
 864  *
 865  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 866  * WRITE = READ.
 867  *
 868  * During initialization, the host sets up the READ queue position to the first
 869  * IDX position, and WRITE to the last (READ - 1 wrapped)
 870  *
 871  * When the firmware places a packet in a buffer, it will advance the READ idx
 872  * and fire the RX interrupt.  The driver can then query the READ idx and
 873  * process as many packets as possible, moving the WRITE idx forward as it
 874  * resets the Rx queue buffers with new memory.
 875  *
 876  * The management in the driver is as follows:
 877  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 878  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 879  *   to replenish the iwl->rxq->rx_free.
 880  * + In il3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 881  *   iwl->rxq is replenished and the READ IDX is updated (updating the
 882  *   'processed' and 'read' driver idxes as well)
 883  * + A received packet is processed and handed to the kernel network stack,
 884  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
 885  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 886  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 887  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
 888  *   were enough free buffers and RX_STALLED is set it is cleared.
 889  *
 890  *
 891  * Driver sequence:
 892  *
 893  * il3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 894  *                            il3945_rx_queue_restock
 895  * il3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 896  *                            queue, updates firmware pointers, and updates
 897  *                            the WRITE idx.  If insufficient rx_free buffers
 898  *                            are available, schedules il3945_rx_replenish
 899  *
 900  * -- enable interrupts --
 901  * ISR - il3945_rx()         Detach il_rx_bufs from pool up to the
 902  *                            READ IDX, detaching the SKB from the pool.
 903  *                            Moves the packet buffer from queue to rx_used.
 904  *                            Calls il3945_rx_queue_restock to refill any empty
 905  *                            slots.
 906  * ...
 907  *
 908  */
 909
 910 /**
 911  * il3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 912  */
 913 static inline __le32
 914 il3945_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
 915 {
 916         return cpu_to_le32((u32) dma_addr);
 917 }
 918
 919 /**
 920  * il3945_rx_queue_restock - refill RX queue from pre-allocated pool
 921  *
 922  * If there are slots in the RX queue that need to be restocked,
 923  * and we have free pre-allocated buffers, fill the ranks as much
 924  * as we can, pulling from rx_free.
 925  *
 926  * This moves the 'write' idx forward to catch up with 'processed', and
 927  * also updates the memory address in the firmware to reference the new
 928  * target buffer.
 929  */
 930 static void
 931 il3945_rx_queue_restock(struct il_priv *il)
 932 {
 933         struct il_rx_queue *rxq = &il->rxq;
 934         struct list_head *element;
 935         struct il_rx_buf *rxb;
 936         unsigned long flags;
 937
 938         spin_lock_irqsave(&rxq->lock, flags);
 939         while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
 940                 /* Get next free Rx buffer, remove from free list */
 941                 element = rxq->rx_free.next;
 942                 rxb = list_entry(element, struct il_rx_buf, list);
 943                 list_del(element);
 944
 945                 /* Point to Rx buffer via next RBD in circular buffer */
 946                 rxq->bd[rxq->write] =
 947                     il3945_dma_addr2rbd_ptr(il, rxb->page_dma);
 948                 rxq->queue[rxq->write] = rxb;
 949                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
 950                 rxq->free_count--;
 951         }
 952         spin_unlock_irqrestore(&rxq->lock, flags);
 953         /* If the pre-allocated buffer pool is dropping low, schedule to
 954          * refill it */
 955         if (rxq->free_count <= RX_LOW_WATERMARK)
 956                 queue_work(il->workqueue, &il->rx_replenish);
 957
 958         /* If we've added more space for the firmware to place data, tell it.
 959          * Increment device's write pointer in multiples of 8. */
 960         if (rxq->write_actual != (rxq->write & ~0x7) ||
 961             abs(rxq->write - rxq->read) > 7) {
 962                 spin_lock_irqsave(&rxq->lock, flags);
 963                 rxq->need_update = 1;
 964                 spin_unlock_irqrestore(&rxq->lock, flags);
 965                 il_rx_queue_update_write_ptr(il, rxq);
 966         }
 967 }
 968
 969 /**
 970  * il3945_rx_replenish - Move all used packet from rx_used to rx_free
 971  *
 972  * When moving to rx_free an SKB is allocated for the slot.
 973  *
 974  * Also restock the Rx queue via il3945_rx_queue_restock.
 975  * This is called as a scheduled work item (except for during initialization)
 976  */
 977 static void
 978 il3945_rx_allocate(struct il_priv *il, gfp_t priority)
 979 {
 980         struct il_rx_queue *rxq = &il->rxq;
 981         struct list_head *element;
 982         struct il_rx_buf *rxb;
 983         struct page *page;
 984         dma_addr_t page_dma;
 985         unsigned long flags;
 986         gfp_t gfp_mask = priority;
 987
 988         while (1) {
 989                 spin_lock_irqsave(&rxq->lock, flags);
 990                 if (list_empty(&rxq->rx_used)) {
 991                         spin_unlock_irqrestore(&rxq->lock, flags);
 992                         return;
 993                 }
 994                 spin_unlock_irqrestore(&rxq->lock, flags);
 995
 996                 if (rxq->free_count > RX_LOW_WATERMARK)
 997                         gfp_mask |= __GFP_NOWARN;
 998
 999                 if (il->hw_params.rx_page_order > 0)
1000                         gfp_mask |= __GFP_COMP;
1001
1002                 /* Alloc a new receive buffer */
1003                 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
1004                 if (!page) {
1005                         if (net_ratelimit())
1006                                 D_INFO("Failed to allocate SKB buffer.\n");
1007                         if (rxq->free_count <= RX_LOW_WATERMARK &&
1008                             net_ratelimit())
1009                                 IL_ERR("Failed to allocate SKB buffer with %0x."
1010                                        "Only %u free buffers remaining.\n",
1011                                        priority, rxq->free_count);
1012                         /* We don't reschedule replenish work here -- we will
1013                          * call the restock method and if it still needs
1014                          * more buffers it will schedule replenish */
1015                         break;
1016                 }
1017
1018                 /* Get physical address of RB/SKB */
1019                 page_dma =
1020                     pci_map_page(il->pci_dev, page, 0,
1021                                  PAGE_SIZE << il->hw_params.rx_page_order,
1022                                  PCI_DMA_FROMDEVICE);
1023
1024                 if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) {
1025                         __free_pages(page, il->hw_params.rx_page_order);
1026                         break;
1027                 }
1028
1029                 spin_lock_irqsave(&rxq->lock, flags);
1030
1031                 if (list_empty(&rxq->rx_used)) {
1032                         spin_unlock_irqrestore(&rxq->lock, flags);
1033                         pci_unmap_page(il->pci_dev, page_dma,
1034                                        PAGE_SIZE << il->hw_params.rx_page_order,
1035                                        PCI_DMA_FROMDEVICE);
1036                         __free_pages(page, il->hw_params.rx_page_order);
1037                         return;
1038                 }
1039
1040                 element = rxq->rx_used.next;
1041                 rxb = list_entry(element, struct il_rx_buf, list);
1042                 list_del(element);
1043
1044                 rxb->page = page;
1045                 rxb->page_dma = page_dma;
1046                 list_add_tail(&rxb->list, &rxq->rx_free);
1047                 rxq->free_count++;
1048                 il->alloc_rxb_page++;
1049
1050                 spin_unlock_irqrestore(&rxq->lock, flags);
1051         }
1052 }
1053
1054 void
1055 il3945_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
1056 {
1057         unsigned long flags;
1058         int i;
1059         spin_lock_irqsave(&rxq->lock, flags);
1060         INIT_LIST_HEAD(&rxq->rx_free);
1061         INIT_LIST_HEAD(&rxq->rx_used);
1062         /* Fill the rx_used queue with _all_ of the Rx buffers */
1063         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1064                 /* In the reset function, these buffers may have been allocated
1065                  * to an SKB, so we need to unmap and free potential storage */
1066                 if (rxq->pool[i].page != NULL) {
1067                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1068                                        PAGE_SIZE << il->hw_params.rx_page_order,
1069                                        PCI_DMA_FROMDEVICE);
1070                         __il_free_pages(il, rxq->pool[i].page);
1071                         rxq->pool[i].page = NULL;
1072                 }
1073                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1074         }
1075
1076         /* Set us so that we have processed and used all buffers, but have
1077          * not restocked the Rx queue with fresh buffers */
1078         rxq->read = rxq->write = 0;
1079         rxq->write_actual = 0;
1080         rxq->free_count = 0;
1081         spin_unlock_irqrestore(&rxq->lock, flags);
1082 }
1083
1084 void
1085 il3945_rx_replenish(void *data)
1086 {
1087         struct il_priv *il = data;
1088         unsigned long flags;
1089
1090         il3945_rx_allocate(il, GFP_KERNEL);
1091
1092         spin_lock_irqsave(&il->lock, flags);
1093         il3945_rx_queue_restock(il);
1094         spin_unlock_irqrestore(&il->lock, flags);
1095 }
1096
1097 static void
1098 il3945_rx_replenish_now(struct il_priv *il)
1099 {
1100         il3945_rx_allocate(il, GFP_ATOMIC);
1101
1102         il3945_rx_queue_restock(il);
1103 }
1104
1105 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1106  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1107  * This free routine walks the list of POOL entries and if SKB is set to
1108  * non NULL it is unmapped and freed
1109  */
1110 static void
1111 il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
1112 {
1113         int i;
1114         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1115                 if (rxq->pool[i].page != NULL) {
1116                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1117                                        PAGE_SIZE << il->hw_params.rx_page_order,
1118                                        PCI_DMA_FROMDEVICE);
1119                         __il_free_pages(il, rxq->pool[i].page);
1120                         rxq->pool[i].page = NULL;
1121                 }
1122         }
1123
1124         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1125                           rxq->bd_dma);
1126         dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
1127                           rxq->rb_stts, rxq->rb_stts_dma);
1128         rxq->bd = NULL;
1129         rxq->rb_stts = NULL;
1130 }
1131
1132 /* Convert linear signal-to-noise ratio into dB */
1133 static u8 ratio2dB[100] = {
1134 /*       0   1   2   3   4   5   6   7   8   9 */
1135         0, 0, 6, 10, 12, 14, 16, 17, 18, 19,    /* 00 - 09 */
1136         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1137         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1138         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1139         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1140         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1141         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1142         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1143         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1144         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1145 };
1146
1147 /* Calculates a relative dB value from a ratio of linear
1148  *   (i.e. not dB) signal levels.
1149  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1150 int
1151 il3945_calc_db_from_ratio(int sig_ratio)
1152 {
1153         /* 1000:1 or higher just report as 60 dB */
1154         if (sig_ratio >= 1000)
1155                 return 60;
1156
1157         /* 100:1 or higher, divide by 10 and use table,
1158          *   add 20 dB to make up for divide by 10 */
1159         if (sig_ratio >= 100)
1160                 return 20 + (int)ratio2dB[sig_ratio / 10];
1161
1162         /* We shouldn't see this */
1163         if (sig_ratio < 1)
1164                 return 0;
1165
1166         /* Use table for ratios 1:1 - 99:1 */
1167         return (int)ratio2dB[sig_ratio];
1168 }
1169
1170 /**
1171  * il3945_rx_handle - Main entry function for receiving responses from uCode
1172  *
1173  * Uses the il->handlers callback function array to invoke
1174  * the appropriate handlers, including command responses,
1175  * frame-received notifications, and other notifications.
1176  */
1177 static void
1178 il3945_rx_handle(struct il_priv *il)
1179 {
1180         struct il_rx_buf *rxb;
1181         struct il_rx_pkt *pkt;
1182         struct il_rx_queue *rxq = &il->rxq;
1183         u32 r, i;
1184         int reclaim;
1185         unsigned long flags;
1186         u8 fill_rx = 0;
1187         u32 count = 8;
1188         int total_empty = 0;
1189
1190         /* uCode's read idx (stored in shared DRAM) indicates the last Rx
1191          * buffer that the driver may process (last buffer filled by ucode). */
1192         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1193         i = rxq->read;
1194
1195         /* calculate total frames need to be restock after handling RX */
1196         total_empty = r - rxq->write_actual;
1197         if (total_empty < 0)
1198                 total_empty += RX_QUEUE_SIZE;
1199
1200         if (total_empty > (RX_QUEUE_SIZE / 2))
1201                 fill_rx = 1;
1202         /* Rx interrupt, but nothing sent from uCode */
1203         if (i == r)
1204                 D_RX("r = %d, i = %d\n", r, i);
1205
1206         while (i != r) {
1207                 int len;
1208
1209                 rxb = rxq->queue[i];
1210
1211                 /* If an RXB doesn't have a Rx queue slot associated with it,
1212                  * then a bug has been introduced in the queue refilling
1213                  * routines -- catch it here */
1214                 BUG_ON(rxb == NULL);
1215
1216                 rxq->queue[i] = NULL;
1217
1218                 pci_unmap_page(il->pci_dev, rxb->page_dma,
1219                                PAGE_SIZE << il->hw_params.rx_page_order,
1220                                PCI_DMA_FROMDEVICE);
1221                 pkt = rxb_addr(rxb);
1222
1223                 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
1224                 len += sizeof(u32);     /* account for status word */
1225
1226                 reclaim = il_need_reclaim(il, pkt);
1227
1228                 /* Based on type of command response or notification,
1229                  *   handle those that need handling via function in
1230                  *   handlers table.  See il3945_setup_handlers() */
1231                 if (il->handlers[pkt->hdr.cmd]) {
1232                         D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
1233                              il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1234                         il->isr_stats.handlers[pkt->hdr.cmd]++;
1235                         il->handlers[pkt->hdr.cmd] (il, rxb);
1236                 } else {
1237                         /* No handling needed */
1238                         D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
1239                              i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1240                 }
1241
1242                 /*
1243                  * XXX: After here, we should always check rxb->page
1244                  * against NULL before touching it or its virtual
1245                  * memory (pkt). Because some handler might have
1246                  * already taken or freed the pages.
1247                  */
1248
1249                 if (reclaim) {
1250                         /* Invoke any callbacks, transfer the buffer to caller,
1251                          * and fire off the (possibly) blocking il_send_cmd()
1252                          * as we reclaim the driver command queue */
1253                         if (rxb->page)
1254                                 il_tx_cmd_complete(il, rxb);
1255                         else
1256                                 IL_WARN("Claim null rxb?\n");
1257                 }
1258
1259                 /* Reuse the page if possible. For notification packets and
1260                  * SKBs that fail to Rx correctly, add them back into the
1261                  * rx_free list for reuse later. */
1262                 spin_lock_irqsave(&rxq->lock, flags);
1263                 if (rxb->page != NULL) {
1264                         rxb->page_dma =
1265                             pci_map_page(il->pci_dev, rxb->page, 0,
1266                                          PAGE_SIZE << il->hw_params.
1267                                          rx_page_order, PCI_DMA_FROMDEVICE);
1268                         if (unlikely(pci_dma_mapping_error(il->pci_dev,
1269                                                            rxb->page_dma))) {
1270                                 __il_free_pages(il, rxb->page);
1271                                 rxb->page = NULL;
1272                                 list_add_tail(&rxb->list, &rxq->rx_used);
1273                         } else {
1274                                 list_add_tail(&rxb->list, &rxq->rx_free);
1275                                 rxq->free_count++;
1276                         }
1277                 } else
1278                         list_add_tail(&rxb->list, &rxq->rx_used);
1279
1280                 spin_unlock_irqrestore(&rxq->lock, flags);
1281
1282                 i = (i + 1) & RX_QUEUE_MASK;
1283                 /* If there are a lot of unused frames,
1284                  * restock the Rx queue so ucode won't assert. */
1285                 if (fill_rx) {
1286                         count++;
1287                         if (count >= 8) {
1288                                 rxq->read = i;
1289                                 il3945_rx_replenish_now(il);
1290                                 count = 0;
1291                         }
1292                 }
1293         }
1294
1295         /* Backtrack one entry */
1296         rxq->read = i;
1297         if (fill_rx)
1298                 il3945_rx_replenish_now(il);
1299         else
1300                 il3945_rx_queue_restock(il);
1301 }
1302
1303 /* call this function to flush any scheduled tasklet */
1304 static inline void
1305 il3945_synchronize_irq(struct il_priv *il)
1306 {
1307         /* wait to make sure we flush pending tasklet */
1308         synchronize_irq(il->pci_dev->irq);
1309         tasklet_kill(&il->irq_tasklet);
1310 }
1311
1312 static const char *
1313 il3945_desc_lookup(int i)
1314 {
1315         switch (i) {
1316         case 1:
1317                 return "FAIL";
1318         case 2:
1319                 return "BAD_PARAM";
1320         case 3:
1321                 return "BAD_CHECKSUM";
1322         case 4:
1323                 return "NMI_INTERRUPT";
1324         case 5:
1325                 return "SYSASSERT";
1326         case 6:
1327                 return "FATAL_ERROR";
1328         }
1329
1330         return "UNKNOWN";
1331 }
1332
1333 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1334 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1335
1336 void
1337 il3945_dump_nic_error_log(struct il_priv *il)
1338 {
1339         u32 i;
1340         u32 desc, time, count, base, data1;
1341         u32 blink1, blink2, ilink1, ilink2;
1342
1343         base = le32_to_cpu(il->card_alive.error_event_table_ptr);
1344
1345         if (!il3945_hw_valid_rtc_data_addr(base)) {
1346                 IL_ERR("Not valid error log pointer 0x%08X\n", base);
1347                 return;
1348         }
1349
1350         count = il_read_targ_mem(il, base);
1351
1352         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1353                 IL_ERR("Start IWL Error Log Dump:\n");
1354                 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
1355         }
1356
1357         IL_ERR("Desc       Time       asrtPC  blink2 "
1358                "ilink1  nmiPC   Line\n");
1359         for (i = ERROR_START_OFFSET;
1360              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1361              i += ERROR_ELEM_SIZE) {
1362                 desc = il_read_targ_mem(il, base + i);
1363                 time = il_read_targ_mem(il, base + i + 1 * sizeof(u32));
1364                 blink1 = il_read_targ_mem(il, base + i + 2 * sizeof(u32));
1365                 blink2 = il_read_targ_mem(il, base + i + 3 * sizeof(u32));
1366                 ilink1 = il_read_targ_mem(il, base + i + 4 * sizeof(u32));
1367                 ilink2 = il_read_targ_mem(il, base + i + 5 * sizeof(u32));
1368                 data1 = il_read_targ_mem(il, base + i + 6 * sizeof(u32));
1369
1370                 IL_ERR("%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1371                        il3945_desc_lookup(desc), desc, time, blink1, blink2,
1372                        ilink1, ilink2, data1);
1373         }
1374 }
1375
1376 static void
1377 il3945_irq_tasklet(unsigned long data)
1378 {
1379         struct il_priv *il = (struct il_priv *)data;
1380         u32 inta, handled = 0;
1381         u32 inta_fh;
1382         unsigned long flags;
1383 #ifdef CONFIG_IWLEGACY_DEBUG
1384         u32 inta_mask;
1385 #endif
1386
1387         spin_lock_irqsave(&il->lock, flags);
1388
1389         /* Ack/clear/reset pending uCode interrupts.
1390          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1391          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1392         inta = _il_rd(il, CSR_INT);
1393         _il_wr(il, CSR_INT, inta);
1394
1395         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1396          * Any new interrupts that happen after this, either while we're
1397          * in this tasklet, or later, will show up in next ISR/tasklet. */
1398         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1399         _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
1400
1401 #ifdef CONFIG_IWLEGACY_DEBUG
1402         if (il_get_debug_level(il) & IL_DL_ISR) {
1403                 /* just for debug */
1404                 inta_mask = _il_rd(il, CSR_INT_MASK);
1405                 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
1406                       inta_mask, inta_fh);
1407         }
1408 #endif
1409
1410         spin_unlock_irqrestore(&il->lock, flags);
1411
1412         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1413          * atomic, make sure that inta covers all the interrupts that
1414          * we've discovered, even if FH interrupt came in just after
1415          * reading CSR_INT. */
1416         if (inta_fh & CSR39_FH_INT_RX_MASK)
1417                 inta |= CSR_INT_BIT_FH_RX;
1418         if (inta_fh & CSR39_FH_INT_TX_MASK)
1419                 inta |= CSR_INT_BIT_FH_TX;
1420
1421         /* Now service all interrupt bits discovered above. */
1422         if (inta & CSR_INT_BIT_HW_ERR) {
1423                 IL_ERR("Hardware error detected.  Restarting.\n");
1424
1425                 /* Tell the device to stop sending interrupts */
1426                 il_disable_interrupts(il);
1427
1428                 il->isr_stats.hw++;
1429                 il_irq_handle_error(il);
1430
1431                 handled |= CSR_INT_BIT_HW_ERR;
1432
1433                 return;
1434         }
1435 #ifdef CONFIG_IWLEGACY_DEBUG
1436         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1437                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1438                 if (inta & CSR_INT_BIT_SCD) {
1439                         D_ISR("Scheduler finished to transmit "
1440                               "the frame/frames.\n");
1441                         il->isr_stats.sch++;
1442                 }
1443
1444                 /* Alive notification via Rx interrupt will do the real work */
1445                 if (inta & CSR_INT_BIT_ALIVE) {
1446                         D_ISR("Alive interrupt\n");
1447                         il->isr_stats.alive++;
1448                 }
1449         }
1450 #endif
1451         /* Safely ignore these bits for debug checks below */
1452         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1453
1454         /* Error detected by uCode */
1455         if (inta & CSR_INT_BIT_SW_ERR) {
1456                 IL_ERR("Microcode SW error detected. " "Restarting 0x%X.\n",
1457                        inta);
1458                 il->isr_stats.sw++;
1459                 il_irq_handle_error(il);
1460                 handled |= CSR_INT_BIT_SW_ERR;
1461         }
1462
1463         /* uCode wakes up after power-down sleep */
1464         if (inta & CSR_INT_BIT_WAKEUP) {
1465                 D_ISR("Wakeup interrupt\n");
1466                 il_rx_queue_update_write_ptr(il, &il->rxq);
1467
1468                 spin_lock_irqsave(&il->lock, flags);
1469                 il_txq_update_write_ptr(il, &il->txq[0]);
1470                 il_txq_update_write_ptr(il, &il->txq[1]);
1471                 il_txq_update_write_ptr(il, &il->txq[2]);
1472                 il_txq_update_write_ptr(il, &il->txq[3]);
1473                 il_txq_update_write_ptr(il, &il->txq[4]);
1474                 spin_unlock_irqrestore(&il->lock, flags);
1475
1476                 il->isr_stats.wakeup++;
1477                 handled |= CSR_INT_BIT_WAKEUP;
1478         }
1479
1480         /* All uCode command responses, including Tx command responses,
1481          * Rx "responses" (frame-received notification), and other
1482          * notifications from uCode come through here*/
1483         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1484                 il3945_rx_handle(il);
1485                 il->isr_stats.rx++;
1486                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1487         }
1488
1489         if (inta & CSR_INT_BIT_FH_TX) {
1490                 D_ISR("Tx interrupt\n");
1491                 il->isr_stats.tx++;
1492
1493                 _il_wr(il, CSR_FH_INT_STATUS, (1 << 6));
1494                 il_wr(il, FH39_TCSR_CREDIT(FH39_SRVC_CHNL), 0x0);
1495                 handled |= CSR_INT_BIT_FH_TX;
1496         }
1497
1498         if (inta & ~handled) {
1499                 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1500                 il->isr_stats.unhandled++;
1501         }
1502
1503         if (inta & ~il->inta_mask) {
1504                 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
1505                         inta & ~il->inta_mask);
1506                 IL_WARN("   with inta_fh = 0x%08x\n", inta_fh);
1507         }
1508
1509         /* Re-enable all interrupts */
1510         /* only Re-enable if disabled by irq */
1511         if (test_bit(S_INT_ENABLED, &il->status))
1512                 il_enable_interrupts(il);
1513
1514 #ifdef CONFIG_IWLEGACY_DEBUG
1515         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1516                 inta = _il_rd(il, CSR_INT);
1517                 inta_mask = _il_rd(il, CSR_INT_MASK);
1518                 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1519                 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1520                       "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1521         }
1522 #endif
1523 }
1524
1525 static int
1526 il3945_get_channels_for_scan(struct il_priv *il, enum nl80211_band band,
1527                              u8 is_active, u8 n_probes,
1528                              struct il3945_scan_channel *scan_ch,
1529                              struct ieee80211_vif *vif)
1530 {
1531         struct ieee80211_channel *chan;
1532         const struct ieee80211_supported_band *sband;
1533         const struct il_channel_info *ch_info;
1534         u16 passive_dwell = 0;
1535         u16 active_dwell = 0;
1536         int added, i;
1537
1538         sband = il_get_hw_mode(il, band);
1539         if (!sband)
1540                 return 0;
1541
1542         active_dwell = il_get_active_dwell_time(il, band, n_probes);
1543         passive_dwell = il_get_passive_dwell_time(il, band, vif);
1544
1545         if (passive_dwell <= active_dwell)
1546                 passive_dwell = active_dwell + 1;
1547
1548         for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
1549                 chan = il->scan_request->channels[i];
1550
1551                 if (chan->band != band)
1552                         continue;
1553
1554                 scan_ch->channel = chan->hw_value;
1555
1556                 ch_info = il_get_channel_info(il, band, scan_ch->channel);
1557                 if (!il_is_channel_valid(ch_info)) {
1558                         D_SCAN("Channel %d is INVALID for this band.\n",
1559                                scan_ch->channel);
1560                         continue;
1561                 }
1562
1563                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1564                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1565                 /* If passive , set up for auto-switch
1566                  *  and use long active_dwell time.
1567                  */
1568                 if (!is_active || il_is_channel_passive(ch_info) ||
1569                     (chan->flags & IEEE80211_CHAN_NO_IR)) {
1570                         scan_ch->type = 0;      /* passive */
1571                         if (IL_UCODE_API(il->ucode_ver) == 1)
1572                                 scan_ch->active_dwell =
1573                                     cpu_to_le16(passive_dwell - 1);
1574                 } else {
1575                         scan_ch->type = 1;      /* active */
1576                 }
1577
1578                 /* Set direct probe bits. These may be used both for active
1579                  * scan channels (probes gets sent right away),
1580                  * or for passive channels (probes get se sent only after
1581                  * hearing clear Rx packet).*/
1582                 if (IL_UCODE_API(il->ucode_ver) >= 2) {
1583                         if (n_probes)
1584                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1585                 } else {
1586                         /* uCode v1 does not allow setting direct probe bits on
1587                          * passive channel. */
1588                         if ((scan_ch->type & 1) && n_probes)
1589                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1590                 }
1591
1592                 /* Set txpower levels to defaults */
1593                 scan_ch->tpc.dsp_atten = 110;
1594                 /* scan_pwr_info->tpc.dsp_atten; */
1595
1596                 /*scan_pwr_info->tpc.tx_gain; */
1597                 if (band == NL80211_BAND_5GHZ)
1598                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1599                 else {
1600                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1601                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1602                          * power level:
1603                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1604                          */
1605                 }
1606
1607                 D_SCAN("Scanning %d [%s %d]\n", scan_ch->channel,
1608                        (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1609                        (scan_ch->type & 1) ? active_dwell : passive_dwell);
1610
1611                 scan_ch++;
1612                 added++;
1613         }
1614
1615         D_SCAN("total channels to scan %d\n", added);
1616         return added;
1617 }
1618
1619 static void
1620 il3945_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
1621 {
1622         int i;
1623
1624         for (i = 0; i < RATE_COUNT_LEGACY; i++) {
1625                 rates[i].bitrate = il3945_rates[i].ieee * 5;
1626                 rates[i].hw_value = i;  /* Rate scaling will work on idxes */
1627                 rates[i].hw_value_short = i;
1628                 rates[i].flags = 0;
1629                 if (i > IL39_LAST_OFDM_RATE || i < IL_FIRST_OFDM_RATE) {
1630                         /*
1631                          * If CCK != 1M then set short preamble rate flag.
1632                          */
1633                         rates[i].flags |=
1634                             (il3945_rates[i].plcp ==
1635                              10) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1636                 }
1637         }
1638 }
1639
1640 /******************************************************************************
1641  *
1642  * uCode download functions
1643  *
1644  ******************************************************************************/
1645
1646 static void
1647 il3945_dealloc_ucode_pci(struct il_priv *il)
1648 {
1649         il_free_fw_desc(il->pci_dev, &il->ucode_code);
1650         il_free_fw_desc(il->pci_dev, &il->ucode_data);
1651         il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
1652         il_free_fw_desc(il->pci_dev, &il->ucode_init);
1653         il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
1654         il_free_fw_desc(il->pci_dev, &il->ucode_boot);
1655 }
1656
1657 /**
1658  * il3945_verify_inst_full - verify runtime uCode image in card vs. host,
1659  *     looking at all data.
1660  */
1661 static int
1662 il3945_verify_inst_full(struct il_priv *il, __le32 * image, u32 len)
1663 {
1664         u32 val;
1665         u32 save_len = len;
1666         int rc = 0;
1667         u32 errcnt;
1668
1669         D_INFO("ucode inst image size is %u\n", len);
1670
1671         il_wr(il, HBUS_TARG_MEM_RADDR, IL39_RTC_INST_LOWER_BOUND);
1672
1673         errcnt = 0;
1674         for (; len > 0; len -= sizeof(u32), image++) {
1675                 /* read data comes through single port, auto-incr addr */
1676                 /* NOTE: Use the debugless read so we don't flood kernel log
1677                  * if IL_DL_IO is set */
1678                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1679                 if (val != le32_to_cpu(*image)) {
1680                         IL_ERR("uCode INST section is invalid at "
1681                                "offset 0x%x, is 0x%x, s/b 0x%x\n",
1682                                save_len - len, val, le32_to_cpu(*image));
1683                         rc = -EIO;
1684                         errcnt++;
1685                         if (errcnt >= 20)
1686                                 break;
1687                 }
1688         }
1689
1690         if (!errcnt)
1691                 D_INFO("ucode image in INSTRUCTION memory is good\n");
1692
1693         return rc;
1694 }
1695
1696 /**
1697  * il3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1698  *   using sample data 100 bytes apart.  If these sample points are good,
1699  *   it's a pretty good bet that everything between them is good, too.
1700  */
1701 static int
1702 il3945_verify_inst_sparse(struct il_priv *il, __le32 * image, u32 len)
1703 {
1704         u32 val;
1705         int rc = 0;
1706         u32 errcnt = 0;
1707         u32 i;
1708
1709         D_INFO("ucode inst image size is %u\n", len);
1710
1711         for (i = 0; i < len; i += 100, image += 100 / sizeof(u32)) {
1712                 /* read data comes through single port, auto-incr addr */
1713                 /* NOTE: Use the debugless read so we don't flood kernel log
1714                  * if IL_DL_IO is set */
1715                 il_wr(il, HBUS_TARG_MEM_RADDR, i + IL39_RTC_INST_LOWER_BOUND);
1716                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1717                 if (val != le32_to_cpu(*image)) {
1718 #if 0                           /* Enable this if you want to see details */
1719                         IL_ERR("uCode INST section is invalid at "
1720                                "offset 0x%x, is 0x%x, s/b 0x%x\n", i, val,
1721                                *image);
1722 #endif
1723                         rc = -EIO;
1724                         errcnt++;
1725                         if (errcnt >= 3)
1726                                 break;
1727                 }
1728         }
1729
1730         return rc;
1731 }
1732
1733 /**
1734  * il3945_verify_ucode - determine which instruction image is in SRAM,
1735  *    and verify its contents
1736  */
1737 static int
1738 il3945_verify_ucode(struct il_priv *il)
1739 {
1740         __le32 *image;
1741         u32 len;
1742         int rc = 0;
1743
1744         /* Try bootstrap */
1745         image = (__le32 *) il->ucode_boot.v_addr;
1746         len = il->ucode_boot.len;
1747         rc = il3945_verify_inst_sparse(il, image, len);
1748         if (rc == 0) {
1749                 D_INFO("Bootstrap uCode is good in inst SRAM\n");
1750                 return 0;
1751         }
1752
1753         /* Try initialize */
1754         image = (__le32 *) il->ucode_init.v_addr;
1755         len = il->ucode_init.len;
1756         rc = il3945_verify_inst_sparse(il, image, len);
1757         if (rc == 0) {
1758                 D_INFO("Initialize uCode is good in inst SRAM\n");
1759                 return 0;
1760         }
1761
1762         /* Try runtime/protocol */
1763         image = (__le32 *) il->ucode_code.v_addr;
1764         len = il->ucode_code.len;
1765         rc = il3945_verify_inst_sparse(il, image, len);
1766         if (rc == 0) {
1767                 D_INFO("Runtime uCode is good in inst SRAM\n");
1768                 return 0;
1769         }
1770
1771         IL_ERR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1772
1773         /* Since nothing seems to match, show first several data entries in
1774          * instruction SRAM, so maybe visual inspection will give a clue.
1775          * Selection of bootstrap image (vs. other images) is arbitrary. */
1776         image = (__le32 *) il->ucode_boot.v_addr;
1777         len = il->ucode_boot.len;
1778         rc = il3945_verify_inst_full(il, image, len);
1779
1780         return rc;
1781 }
1782
1783 static void
1784 il3945_nic_start(struct il_priv *il)
1785 {
1786         /* Remove all resets to allow NIC to operate */
1787         _il_wr(il, CSR_RESET, 0);
1788 }
1789
1790 #define IL3945_UCODE_GET(item)                                          \
1791 static u32 il3945_ucode_get_##item(const struct il_ucode_header *ucode)\
1792 {                                                                       \
1793         return le32_to_cpu(ucode->v1.item);                             \
1794 }
1795
1796 static u32
1797 il3945_ucode_get_header_size(u32 api_ver)
1798 {
1799         return 24;
1800 }
1801
1802 static u8 *
1803 il3945_ucode_get_data(const struct il_ucode_header *ucode)
1804 {
1805         return (u8 *) ucode->v1.data;
1806 }
1807
1808 IL3945_UCODE_GET(inst_size);
1809 IL3945_UCODE_GET(data_size);
1810 IL3945_UCODE_GET(init_size);
1811 IL3945_UCODE_GET(init_data_size);
1812 IL3945_UCODE_GET(boot_size);
1813
1814 /**
1815  * il3945_read_ucode - Read uCode images from disk file.
1816  *
1817  * Copy into buffers for card to fetch via bus-mastering
1818  */
1819 static int
1820 il3945_read_ucode(struct il_priv *il)
1821 {
1822         const struct il_ucode_header *ucode;
1823         int ret = -EINVAL, idx;
1824         const struct firmware *ucode_raw;
1825         /* firmware file name contains uCode/driver compatibility version */
1826         const char *name_pre = il->cfg->fw_name_pre;
1827         const unsigned int api_max = il->cfg->ucode_api_max;
1828         const unsigned int api_min = il->cfg->ucode_api_min;
1829         char buf[25];
1830         u8 *src;
1831         size_t len;
1832         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1833
1834         /* Ask kernel firmware_class module to get the boot firmware off disk.
1835          * reject_firmware() is synchronous, file is in memory on return. */
1836         for (idx = api_max; idx >= api_min; idx--) {
1837                 sprintf(buf, "/*(DEBLOBBED)*/");
1838                 ret = reject_firmware(&ucode_raw, buf, &il->pci_dev->dev);
1839                 if (ret < 0) {
1840                         IL_ERR("%s firmware file req failed: %d\n", buf, ret);
1841                         if (ret == -ENOENT)
1842                                 continue;
1843                         else
1844                                 goto error;
1845                 } else {
1846                         if (idx < api_max)
1847                                 IL_ERR("Loaded firmware %s, "
1848                                        "which is deprecated. "
1849                                        " Please use API v%u instead.\n", buf,
1850                                        api_max);
1851                         D_INFO("Got firmware '%s' file "
1852                                "(%zd bytes) from disk\n", buf, ucode_raw->size);
1853                         break;
1854                 }
1855         }
1856
1857         if (ret < 0)
1858                 goto error;
1859
1860         /* Make sure that we got at least our header! */
1861         if (ucode_raw->size < il3945_ucode_get_header_size(1)) {
1862                 IL_ERR("File size way too small!\n");
1863                 ret = -EINVAL;
1864                 goto err_release;
1865         }
1866
1867         /* Data from ucode file:  header followed by uCode images */
1868         ucode = (struct il_ucode_header *)ucode_raw->data;
1869
1870         il->ucode_ver = le32_to_cpu(ucode->ver);
1871         api_ver = IL_UCODE_API(il->ucode_ver);
1872         inst_size = il3945_ucode_get_inst_size(ucode);
1873         data_size = il3945_ucode_get_data_size(ucode);
1874         init_size = il3945_ucode_get_init_size(ucode);
1875         init_data_size = il3945_ucode_get_init_data_size(ucode);
1876         boot_size = il3945_ucode_get_boot_size(ucode);
1877         src = il3945_ucode_get_data(ucode);
1878
1879         /* api_ver should match the api version forming part of the
1880          * firmware filename ... but we don't check for that and only rely
1881          * on the API version read from firmware header from here on forward */
1882
1883         if (api_ver < api_min || api_ver > api_max) {
1884                 IL_ERR("Driver unable to support your firmware API. "
1885                        "Driver supports v%u, firmware is v%u.\n", api_max,
1886                        api_ver);
1887                 il->ucode_ver = 0;
1888                 ret = -EINVAL;
1889                 goto err_release;
1890         }
1891         if (api_ver != api_max)
1892                 IL_ERR("Firmware has old API version. Expected %u, "
1893                        "got %u. New firmware can be obtained "
1894                        "from http://www.intellinuxwireless.org.\n", api_max,
1895                        api_ver);
1896
1897         IL_INFO("loaded firmware version %u.%u.%u.%u\n",
1898                 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
1899                 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
1900
1901         snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
1902                  "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
1903                  IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
1904                  IL_UCODE_SERIAL(il->ucode_ver));
1905
1906         D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
1907         D_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
1908         D_INFO("f/w package hdr runtime data size = %u\n", data_size);
1909         D_INFO("f/w package hdr init inst size = %u\n", init_size);
1910         D_INFO("f/w package hdr init data size = %u\n", init_data_size);
1911         D_INFO("f/w package hdr boot inst size = %u\n", boot_size);
1912
1913         /* Verify size of file vs. image size info in file's header */
1914         if (ucode_raw->size !=
1915             il3945_ucode_get_header_size(api_ver) + inst_size + data_size +
1916             init_size + init_data_size + boot_size) {
1917
1918                 D_INFO("uCode file size %zd does not match expected size\n",
1919                        ucode_raw->size);
1920                 ret = -EINVAL;
1921                 goto err_release;
1922         }
1923
1924         /* Verify that uCode images will fit in card's SRAM */
1925         if (inst_size > IL39_MAX_INST_SIZE) {
1926                 D_INFO("uCode instr len %d too large to fit in\n", inst_size);
1927                 ret = -EINVAL;
1928                 goto err_release;
1929         }
1930
1931         if (data_size > IL39_MAX_DATA_SIZE) {
1932                 D_INFO("uCode data len %d too large to fit in\n", data_size);
1933                 ret = -EINVAL;
1934                 goto err_release;
1935         }
1936         if (init_size > IL39_MAX_INST_SIZE) {
1937                 D_INFO("uCode init instr len %d too large to fit in\n",
1938                        init_size);
1939                 ret = -EINVAL;
1940                 goto err_release;
1941         }
1942         if (init_data_size > IL39_MAX_DATA_SIZE) {
1943                 D_INFO("uCode init data len %d too large to fit in\n",
1944                        init_data_size);
1945                 ret = -EINVAL;
1946                 goto err_release;
1947         }
1948         if (boot_size > IL39_MAX_BSM_SIZE) {
1949                 D_INFO("uCode boot instr len %d too large to fit in\n",
1950                        boot_size);
1951                 ret = -EINVAL;
1952                 goto err_release;
1953         }
1954
1955         /* Allocate ucode buffers for card's bus-master loading ... */
1956
1957         /* Runtime instructions and 2 copies of data:
1958          * 1) unmodified from disk
1959          * 2) backup cache for save/restore during power-downs */
1960         il->ucode_code.len = inst_size;
1961         il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
1962
1963         il->ucode_data.len = data_size;
1964         il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
1965
1966         il->ucode_data_backup.len = data_size;
1967         il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
1968
1969         if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
1970             !il->ucode_data_backup.v_addr)
1971                 goto err_pci_alloc;
1972
1973         /* Initialization instructions and data */
1974         if (init_size && init_data_size) {
1975                 il->ucode_init.len = init_size;
1976                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
1977
1978                 il->ucode_init_data.len = init_data_size;
1979                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
1980
1981                 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
1982                         goto err_pci_alloc;
1983         }
1984
1985         /* Bootstrap (instructions only, no data) */
1986         if (boot_size) {
1987                 il->ucode_boot.len = boot_size;
1988                 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
1989
1990                 if (!il->ucode_boot.v_addr)
1991                         goto err_pci_alloc;
1992         }
1993
1994         /* Copy images into buffers for card's bus-master reads ... */
1995
1996         /* Runtime instructions (first block of data in file) */
1997         len = inst_size;
1998         D_INFO("Copying (but not loading) uCode instr len %zd\n", len);
1999         memcpy(il->ucode_code.v_addr, src, len);
2000         src += len;
2001
2002         D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2003                il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
2004
2005         /* Runtime data (2nd block)
2006          * NOTE:  Copy into backup buffer will be done in il3945_up()  */
2007         len = data_size;
2008         D_INFO("Copying (but not loading) uCode data len %zd\n", len);
2009         memcpy(il->ucode_data.v_addr, src, len);
2010         memcpy(il->ucode_data_backup.v_addr, src, len);
2011         src += len;
2012
2013         /* Initialization instructions (3rd block) */
2014         if (init_size) {
2015                 len = init_size;
2016                 D_INFO("Copying (but not loading) init instr len %zd\n", len);
2017                 memcpy(il->ucode_init.v_addr, src, len);
2018                 src += len;
2019         }
2020
2021         /* Initialization data (4th block) */
2022         if (init_data_size) {
2023                 len = init_data_size;
2024                 D_INFO("Copying (but not loading) init data len %zd\n", len);
2025                 memcpy(il->ucode_init_data.v_addr, src, len);
2026                 src += len;
2027         }
2028
2029         /* Bootstrap instructions (5th block) */
2030         len = boot_size;
2031         D_INFO("Copying (but not loading) boot instr len %zd\n", len);
2032         memcpy(il->ucode_boot.v_addr, src, len);
2033
2034         /* We have our copies now, allow OS release its copies */
2035         release_firmware(ucode_raw);
2036         return 0;
2037
2038 err_pci_alloc:
2039         IL_ERR("failed to allocate pci memory\n");
2040         ret = -ENOMEM;
2041         il3945_dealloc_ucode_pci(il);
2042
2043 err_release:
2044         release_firmware(ucode_raw);
2045
2046 error:
2047         return ret;
2048 }
2049
2050 /**
2051  * il3945_set_ucode_ptrs - Set uCode address location
2052  *
2053  * Tell initialization uCode where to find runtime uCode.
2054  *
2055  * BSM registers initially contain pointers to initialization uCode.
2056  * We need to replace them to load runtime uCode inst and data,
2057  * and to save runtime data when powering down.
2058  */
2059 static int
2060 il3945_set_ucode_ptrs(struct il_priv *il)
2061 {
2062         dma_addr_t pinst;
2063         dma_addr_t pdata;
2064
2065         /* bits 31:0 for 3945 */
2066         pinst = il->ucode_code.p_addr;
2067         pdata = il->ucode_data_backup.p_addr;
2068
2069         /* Tell bootstrap uCode where to find image to load */
2070         il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
2071         il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
2072         il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, il->ucode_data.len);
2073
2074         /* Inst byte count must be last to set up, bit 31 signals uCode
2075          *   that all new ptr/size info is in place */
2076         il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG,
2077                    il->ucode_code.len | BSM_DRAM_INST_LOAD);
2078
2079         D_INFO("Runtime uCode pointers are set.\n");
2080
2081         return 0;
2082 }
2083
2084 /**
2085  * il3945_init_alive_start - Called after N_ALIVE notification received
2086  *
2087  * Called after N_ALIVE notification received from "initialize" uCode.
2088  *
2089  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2090  */
2091 static void
2092 il3945_init_alive_start(struct il_priv *il)
2093 {
2094         /* Check alive response for "valid" sign from uCode */
2095         if (il->card_alive_init.is_valid != UCODE_VALID_OK) {
2096                 /* We had an error bringing up the hardware, so take it
2097                  * all the way back down so we can try again */
2098                 D_INFO("Initialize Alive failed.\n");
2099                 goto restart;
2100         }
2101
2102         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2103          * This is a paranoid check, because we would not have gotten the
2104          * "initialize" alive if code weren't properly loaded.  */
2105         if (il3945_verify_ucode(il)) {
2106                 /* Runtime instruction load was bad;
2107                  * take it all the way back down so we can try again */
2108                 D_INFO("Bad \"initialize\" uCode load.\n");
2109                 goto restart;
2110         }
2111
2112         /* Send pointers to protocol/runtime uCode image ... init code will
2113          * load and launch runtime uCode, which will send us another "Alive"
2114          * notification. */
2115         D_INFO("Initialization Alive received.\n");
2116         if (il3945_set_ucode_ptrs(il)) {
2117                 /* Runtime instruction load won't happen;
2118                  * take it all the way back down so we can try again */
2119                 D_INFO("Couldn't set up uCode pointers.\n");
2120                 goto restart;
2121         }
2122         return;
2123
2124 restart:
2125         queue_work(il->workqueue, &il->restart);
2126 }
2127
2128 /**
2129  * il3945_alive_start - called after N_ALIVE notification received
2130  *                   from protocol/runtime uCode (initialization uCode's
2131  *                   Alive gets handled by il3945_init_alive_start()).
2132  */
2133 static void
2134 il3945_alive_start(struct il_priv *il)
2135 {
2136         int thermal_spin = 0;
2137         u32 rfkill;
2138
2139         D_INFO("Runtime Alive received.\n");
2140
2141         if (il->card_alive.is_valid != UCODE_VALID_OK) {
2142                 /* We had an error bringing up the hardware, so take it
2143                  * all the way back down so we can try again */
2144                 D_INFO("Alive failed.\n");
2145                 goto restart;
2146         }
2147
2148         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2149          * This is a paranoid check, because we would not have gotten the
2150          * "runtime" alive if code weren't properly loaded.  */
2151         if (il3945_verify_ucode(il)) {
2152                 /* Runtime instruction load was bad;
2153                  * take it all the way back down so we can try again */
2154                 D_INFO("Bad runtime uCode load.\n");
2155                 goto restart;
2156         }
2157
2158         rfkill = il_rd_prph(il, APMG_RFKILL_REG);
2159         D_INFO("RFKILL status: 0x%x\n", rfkill);
2160
2161         if (rfkill & 0x1) {
2162                 clear_bit(S_RFKILL, &il->status);
2163                 /* if RFKILL is not on, then wait for thermal
2164                  * sensor in adapter to kick in */
2165                 while (il3945_hw_get_temperature(il) == 0) {
2166                         thermal_spin++;
2167                         udelay(10);
2168                 }
2169
2170                 if (thermal_spin)
2171                         D_INFO("Thermal calibration took %dus\n",
2172                                thermal_spin * 10);
2173         } else
2174                 set_bit(S_RFKILL, &il->status);
2175
2176         /* After the ALIVE response, we can send commands to 3945 uCode */
2177         set_bit(S_ALIVE, &il->status);
2178
2179         /* Enable watchdog to monitor the driver tx queues */
2180         il_setup_watchdog(il);
2181
2182         if (il_is_rfkill(il))
2183                 return;
2184
2185         ieee80211_wake_queues(il->hw);
2186
2187         il->active_rate = RATES_MASK_3945;
2188
2189         il_power_update_mode(il, true);
2190
2191         if (il_is_associated(il)) {
2192                 struct il3945_rxon_cmd *active_rxon =
2193                     (struct il3945_rxon_cmd *)(&il->active);
2194
2195                 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2196                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2197         } else {
2198                 /* Initialize our rx_config data */
2199                 il_connection_init_rx_config(il);
2200         }
2201
2202         /* Configure Bluetooth device coexistence support */
2203         il_send_bt_config(il);
2204
2205         set_bit(S_READY, &il->status);
2206
2207         /* Configure the adapter for unassociated operation */
2208         il3945_commit_rxon(il);
2209
2210         il3945_reg_txpower_periodic(il);
2211
2212         D_INFO("ALIVE processing complete.\n");
2213         wake_up(&il->wait_command_queue);
2214
2215         return;
2216
2217 restart:
2218         queue_work(il->workqueue, &il->restart);
2219 }
2220
2221 static void il3945_cancel_deferred_work(struct il_priv *il);
2222
2223 static void
2224 __il3945_down(struct il_priv *il)
2225 {
2226         unsigned long flags;
2227         int exit_pending;
2228
2229         D_INFO(DRV_NAME " is going down\n");
2230
2231         il_scan_cancel_timeout(il, 200);
2232
2233         exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
2234
2235         /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
2236          * to prevent rearm timer */
2237         del_timer_sync(&il->watchdog);
2238
2239         /* Station information will now be cleared in device */
2240         il_clear_ucode_stations(il);
2241         il_dealloc_bcast_stations(il);
2242         il_clear_driver_stations(il);
2243
2244         /* Unblock any waiting calls */
2245         wake_up_all(&il->wait_command_queue);
2246
2247         /* Wipe out the EXIT_PENDING status bit if we are not actually
2248          * exiting the module */
2249         if (!exit_pending)
2250                 clear_bit(S_EXIT_PENDING, &il->status);
2251
2252         /* stop and reset the on-board processor */
2253         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2254
2255         /* tell the device to stop sending interrupts */
2256         spin_lock_irqsave(&il->lock, flags);
2257         il_disable_interrupts(il);
2258         spin_unlock_irqrestore(&il->lock, flags);
2259         il3945_synchronize_irq(il);
2260
2261         if (il->mac80211_registered)
2262                 ieee80211_stop_queues(il->hw);
2263
2264         /* If we have not previously called il3945_init() then
2265          * clear all bits but the RF Kill bits and return */
2266         if (!il_is_init(il)) {
2267                 il->status =
2268                     test_bit(S_RFKILL, &il->status) << S_RFKILL |
2269                     test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2270                     test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2271                 goto exit;
2272         }
2273
2274         /* ...otherwise clear out all the status bits but the RF Kill
2275          * bit and continue taking the NIC down. */
2276         il->status &=
2277             test_bit(S_RFKILL, &il->status) << S_RFKILL |
2278             test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2279             test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
2280             test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2281
2282         /*
2283          * We disabled and synchronized interrupt, and priv->mutex is taken, so
2284          * here is the only thread which will program device registers, but
2285          * still have lockdep assertions, so we are taking reg_lock.
2286          */
2287         spin_lock_irq(&il->reg_lock);
2288         /* FIXME: il_grab_nic_access if rfkill is off ? */
2289
2290         il3945_hw_txq_ctx_stop(il);
2291         il3945_hw_rxq_stop(il);
2292         /* Power-down device's busmaster DMA clocks */
2293         _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2294         udelay(5);
2295         /* Stop the device, and put it in low power state */
2296         _il_apm_stop(il);
2297
2298         spin_unlock_irq(&il->reg_lock);
2299
2300         il3945_hw_txq_ctx_free(il);
2301 exit:
2302         memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
2303         dev_kfree_skb(il->beacon_skb);
2304         il->beacon_skb = NULL;
2305
2306         /* clear out any free frames */
2307         il3945_clear_free_frames(il);
2308 }
2309
2310 static void
2311 il3945_down(struct il_priv *il)
2312 {
2313         mutex_lock(&il->mutex);
2314         __il3945_down(il);
2315         mutex_unlock(&il->mutex);
2316
2317         il3945_cancel_deferred_work(il);
2318 }
2319
2320 #define MAX_HW_RESTARTS 5
2321
2322 static int
2323 il3945_alloc_bcast_station(struct il_priv *il)
2324 {
2325         unsigned long flags;
2326         u8 sta_id;
2327
2328         spin_lock_irqsave(&il->sta_lock, flags);
2329         sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
2330         if (sta_id == IL_INVALID_STATION) {
2331                 IL_ERR("Unable to prepare broadcast station\n");
2332                 spin_unlock_irqrestore(&il->sta_lock, flags);
2333
2334                 return -EINVAL;
2335         }
2336
2337         il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
2338         il->stations[sta_id].used |= IL_STA_BCAST;
2339         spin_unlock_irqrestore(&il->sta_lock, flags);
2340
2341         return 0;
2342 }
2343
2344 static int
2345 __il3945_up(struct il_priv *il)
2346 {
2347         int rc, i;
2348
2349         rc = il3945_alloc_bcast_station(il);
2350         if (rc)
2351                 return rc;
2352
2353         if (test_bit(S_EXIT_PENDING, &il->status)) {
2354                 IL_WARN("Exit pending; will not bring the NIC up\n");
2355                 return -EIO;
2356         }
2357
2358         if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
2359                 IL_ERR("ucode not available for device bring up\n");
2360                 return -EIO;
2361         }
2362
2363         /* If platform's RF_KILL switch is NOT set to KILL */
2364         if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2365                 clear_bit(S_RFKILL, &il->status);
2366         else {
2367                 set_bit(S_RFKILL, &il->status);
2368                 return -ERFKILL;
2369         }
2370
2371         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2372
2373         rc = il3945_hw_nic_init(il);
2374         if (rc) {
2375                 IL_ERR("Unable to int nic\n");
2376                 return rc;
2377         }
2378
2379         /* make sure rfkill handshake bits are cleared */
2380         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2381         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2382
2383         /* clear (again), then enable host interrupts */
2384         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2385         il_enable_interrupts(il);
2386
2387         /* really make sure rfkill handshake bits are cleared */
2388         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2389         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2390
2391         /* Copy original ucode data image from disk into backup cache.
2392          * This will be used to initialize the on-board processor's
2393          * data SRAM for a clean start when the runtime program first loads. */
2394         memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
2395                il->ucode_data.len);
2396
2397         /* We return success when we resume from suspend and rf_kill is on. */
2398         if (test_bit(S_RFKILL, &il->status))
2399                 return 0;
2400
2401         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2402
2403                 /* load bootstrap state machine,
2404                  * load bootstrap program into processor's memory,
2405                  * prepare to load the "initialize" uCode */
2406                 rc = il->ops->load_ucode(il);
2407
2408                 if (rc) {
2409                         IL_ERR("Unable to set up bootstrap uCode: %d\n", rc);
2410                         continue;
2411                 }
2412
2413                 /* start card; "initialize" will load runtime ucode */
2414                 il3945_nic_start(il);
2415
2416                 D_INFO(DRV_NAME " is coming up\n");
2417
2418                 return 0;
2419         }
2420
2421         set_bit(S_EXIT_PENDING, &il->status);
2422         __il3945_down(il);
2423         clear_bit(S_EXIT_PENDING, &il->status);
2424
2425         /* tried to restart and config the device for as long as our
2426          * patience could withstand */
2427         IL_ERR("Unable to initialize device after %d attempts.\n", i);
2428         return -EIO;
2429 }
2430
2431 /*****************************************************************************
2432  *
2433  * Workqueue callbacks
2434  *
2435  *****************************************************************************/
2436
2437 static void
2438 il3945_bg_init_alive_start(struct work_struct *data)
2439 {
2440         struct il_priv *il =
2441             container_of(data, struct il_priv, init_alive_start.work);
2442
2443         mutex_lock(&il->mutex);
2444         if (test_bit(S_EXIT_PENDING, &il->status))
2445                 goto out;
2446
2447         il3945_init_alive_start(il);
2448 out:
2449         mutex_unlock(&il->mutex);
2450 }
2451
2452 static void
2453 il3945_bg_alive_start(struct work_struct *data)
2454 {
2455         struct il_priv *il =
2456             container_of(data, struct il_priv, alive_start.work);
2457
2458         mutex_lock(&il->mutex);
2459         if (test_bit(S_EXIT_PENDING, &il->status) || il->txq == NULL)
2460                 goto out;
2461
2462         il3945_alive_start(il);
2463 out:
2464         mutex_unlock(&il->mutex);
2465 }
2466
2467 /*
2468  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2469  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2470  * *is* readable even when device has been SW_RESET into low power mode
2471  * (e.g. during RF KILL).
2472  */
2473 static void
2474 il3945_rfkill_poll(struct work_struct *data)
2475 {
2476         struct il_priv *il =
2477             container_of(data, struct il_priv, _3945.rfkill_poll.work);
2478         bool old_rfkill = test_bit(S_RFKILL, &il->status);
2479         bool new_rfkill =
2480             !(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2481
2482         if (new_rfkill != old_rfkill) {
2483                 if (new_rfkill)
2484                         set_bit(S_RFKILL, &il->status);
2485                 else
2486                         clear_bit(S_RFKILL, &il->status);
2487
2488                 wiphy_rfkill_set_hw_state(il->hw->wiphy, new_rfkill);
2489
2490                 D_RF_KILL("RF_KILL bit toggled to %s.\n",
2491                           new_rfkill ? "disable radio" : "enable radio");
2492         }
2493
2494         /* Keep this running, even if radio now enabled.  This will be
2495          * cancelled in mac_start() if system decides to start again */
2496         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2497                            round_jiffies_relative(2 * HZ));
2498
2499 }
2500
2501 int
2502 il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
2503 {
2504         struct il_host_cmd cmd = {
2505                 .id = C_SCAN,
2506                 .len = sizeof(struct il3945_scan_cmd),
2507                 .flags = CMD_SIZE_HUGE,
2508         };
2509         struct il3945_scan_cmd *scan;
2510         u8 n_probes = 0;
2511         enum nl80211_band band;
2512         bool is_active = false;
2513         int ret;
2514         u16 len;
2515
2516         lockdep_assert_held(&il->mutex);
2517
2518         if (!il->scan_cmd) {
2519                 il->scan_cmd =
2520                     kmalloc(sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE,
2521                             GFP_KERNEL);
2522                 if (!il->scan_cmd) {
2523                         D_SCAN("Fail to allocate scan memory\n");
2524                         return -ENOMEM;
2525                 }
2526         }
2527         scan = il->scan_cmd;
2528         memset(scan, 0, sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE);
2529
2530         scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
2531         scan->quiet_time = IL_ACTIVE_QUIET_TIME;
2532
2533         if (il_is_associated(il)) {
2534                 u16 interval;
2535                 u32 extra;
2536                 u32 suspend_time = 100;
2537                 u32 scan_suspend_time = 100;
2538
2539                 D_INFO("Scanning while associated...\n");
2540
2541                 interval = vif->bss_conf.beacon_int;
2542
2543                 scan->suspend_time = 0;
2544                 scan->max_out_time = cpu_to_le32(200 * 1024);
2545                 if (!interval)
2546                         interval = suspend_time;
2547                 /*
2548                  * suspend time format:
2549                  *  0-19: beacon interval in usec (time before exec.)
2550                  * 20-23: 0
2551                  * 24-31: number of beacons (suspend between channels)
2552                  */
2553
2554                 extra = (suspend_time / interval) << 24;
2555                 scan_suspend_time =
2556                     0xFF0FFFFF & (extra | ((suspend_time % interval) * 1024));
2557
2558                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2559                 D_SCAN("suspend_time 0x%X beacon interval %d\n",
2560                        scan_suspend_time, interval);
2561         }
2562
2563         if (il->scan_request->n_ssids) {
2564                 int i, p = 0;
2565                 D_SCAN("Kicking off active scan\n");
2566                 for (i = 0; i < il->scan_request->n_ssids; i++) {
2567                         /* always does wildcard anyway */
2568                         if (!il->scan_request->ssids[i].ssid_len)
2569                                 continue;
2570                         scan->direct_scan[p].id = WLAN_EID_SSID;
2571                         scan->direct_scan[p].len =
2572                             il->scan_request->ssids[i].ssid_len;
2573                         memcpy(scan->direct_scan[p].ssid,
2574                                il->scan_request->ssids[i].ssid,
2575                                il->scan_request->ssids[i].ssid_len);
2576                         n_probes++;
2577                         p++;
2578                 }
2579                 is_active = true;
2580         } else
2581                 D_SCAN("Kicking off passive scan.\n");
2582
2583         /* We don't build a direct scan probe request; the uCode will do
2584          * that based on the direct_mask added to each channel entry */
2585         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2586         scan->tx_cmd.sta_id = il->hw_params.bcast_id;
2587         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2588
2589         /* flags + rate selection */
2590
2591         switch (il->scan_band) {
2592         case NL80211_BAND_2GHZ:
2593                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2594                 scan->tx_cmd.rate = RATE_1M_PLCP;
2595                 band = NL80211_BAND_2GHZ;
2596                 break;
2597         case NL80211_BAND_5GHZ:
2598                 scan->tx_cmd.rate = RATE_6M_PLCP;
2599                 band = NL80211_BAND_5GHZ;
2600                 break;
2601         default:
2602                 IL_WARN("Invalid scan band\n");
2603                 return -EIO;
2604         }
2605
2606         /*
2607          * If active scaning is requested but a certain channel is marked
2608          * passive, we can do active scanning if we detect transmissions. For
2609          * passive only scanning disable switching to active on any channel.
2610          */
2611         scan->good_CRC_th =
2612             is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
2613
2614         len =
2615             il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
2616                               vif->addr, il->scan_request->ie,
2617                               il->scan_request->ie_len,
2618                               IL_MAX_SCAN_SIZE - sizeof(*scan));
2619         scan->tx_cmd.len = cpu_to_le16(len);
2620
2621         /* select Rx antennas */
2622         scan->flags |= il3945_get_antenna_flags(il);
2623
2624         scan->channel_count =
2625             il3945_get_channels_for_scan(il, band, is_active, n_probes,
2626                                          (void *)&scan->data[len], vif);
2627         if (scan->channel_count == 0) {
2628                 D_SCAN("channel count %d\n", scan->channel_count);
2629                 return -EIO;
2630         }
2631
2632         cmd.len +=
2633             le16_to_cpu(scan->tx_cmd.len) +
2634             scan->channel_count * sizeof(struct il3945_scan_channel);
2635         cmd.data = scan;
2636         scan->len = cpu_to_le16(cmd.len);
2637
2638         set_bit(S_SCAN_HW, &il->status);
2639         ret = il_send_cmd_sync(il, &cmd);
2640         if (ret)
2641                 clear_bit(S_SCAN_HW, &il->status);
2642         return ret;
2643 }
2644
2645 void
2646 il3945_post_scan(struct il_priv *il)
2647 {
2648         /*
2649          * Since setting the RXON may have been deferred while
2650          * performing the scan, fire one off if needed
2651          */
2652         if (memcmp(&il->staging, &il->active, sizeof(il->staging)))
2653                 il3945_commit_rxon(il);
2654 }
2655
2656 static void
2657 il3945_bg_restart(struct work_struct *data)
2658 {
2659         struct il_priv *il = container_of(data, struct il_priv, restart);
2660
2661         if (test_bit(S_EXIT_PENDING, &il->status))
2662                 return;
2663
2664         if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
2665                 mutex_lock(&il->mutex);
2666                 il->is_open = 0;
2667                 mutex_unlock(&il->mutex);
2668                 il3945_down(il);
2669                 ieee80211_restart_hw(il->hw);
2670         } else {
2671                 il3945_down(il);
2672
2673                 mutex_lock(&il->mutex);
2674                 if (test_bit(S_EXIT_PENDING, &il->status)) {
2675                         mutex_unlock(&il->mutex);
2676                         return;
2677                 }
2678
2679                 __il3945_up(il);
2680                 mutex_unlock(&il->mutex);
2681         }
2682 }
2683
2684 static void
2685 il3945_bg_rx_replenish(struct work_struct *data)
2686 {
2687         struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
2688
2689         mutex_lock(&il->mutex);
2690         if (test_bit(S_EXIT_PENDING, &il->status))
2691                 goto out;
2692
2693         il3945_rx_replenish(il);
2694 out:
2695         mutex_unlock(&il->mutex);
2696 }
2697
2698 void
2699 il3945_post_associate(struct il_priv *il)
2700 {
2701         int rc = 0;
2702
2703         if (!il->vif || !il->is_open)
2704                 return;
2705
2706         D_ASSOC("Associated as %d to: %pM\n", il->vif->bss_conf.aid,
2707                 il->active.bssid_addr);
2708
2709         if (test_bit(S_EXIT_PENDING, &il->status))
2710                 return;
2711
2712         il_scan_cancel_timeout(il, 200);
2713
2714         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2715         il3945_commit_rxon(il);
2716
2717         rc = il_send_rxon_timing(il);
2718         if (rc)
2719                 IL_WARN("C_RXON_TIMING failed - " "Attempting to continue.\n");
2720
2721         il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2722
2723         il->staging.assoc_id = cpu_to_le16(il->vif->bss_conf.aid);
2724
2725         D_ASSOC("assoc id %d beacon interval %d\n", il->vif->bss_conf.aid,
2726                 il->vif->bss_conf.beacon_int);
2727
2728         if (il->vif->bss_conf.use_short_preamble)
2729                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2730         else
2731                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2732
2733         if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2734                 if (il->vif->bss_conf.use_short_slot)
2735                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2736                 else
2737                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2738         }
2739
2740         il3945_commit_rxon(il);
2741
2742         switch (il->vif->type) {
2743         case NL80211_IFTYPE_STATION:
2744                 il3945_rate_scale_init(il->hw, IL_AP_ID);
2745                 break;
2746         case NL80211_IFTYPE_ADHOC:
2747                 il3945_send_beacon_cmd(il);
2748                 break;
2749         default:
2750                 IL_ERR("%s Should not be called in %d mode\n", __func__,
2751                       il->vif->type);
2752                 break;
2753         }
2754 }
2755
2756 /*****************************************************************************
2757  *
2758  * mac80211 entry point functions
2759  *
2760  *****************************************************************************/
2761
2762 #define UCODE_READY_TIMEOUT     (2 * HZ)
2763
2764 static int
2765 il3945_mac_start(struct ieee80211_hw *hw)
2766 {
2767         struct il_priv *il = hw->priv;
2768         int ret;
2769
2770         /* we should be verifying the device is ready to be opened */
2771         mutex_lock(&il->mutex);
2772         D_MAC80211("enter\n");
2773
2774         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2775          * ucode filename and max sizes are card-specific. */
2776
2777         if (!il->ucode_code.len) {
2778                 ret = il3945_read_ucode(il);
2779                 if (ret) {
2780                         IL_ERR("Could not read microcode: %d\n", ret);
2781                         mutex_unlock(&il->mutex);
2782                         goto out_release_irq;
2783                 }
2784         }
2785
2786         ret = __il3945_up(il);
2787
2788         mutex_unlock(&il->mutex);
2789
2790         if (ret)
2791                 goto out_release_irq;
2792
2793         D_INFO("Start UP work.\n");
2794
2795         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
2796          * mac80211 will not be run successfully. */
2797         ret = wait_event_timeout(il->wait_command_queue,
2798                                  test_bit(S_READY, &il->status),
2799                                  UCODE_READY_TIMEOUT);
2800         if (!ret) {
2801                 if (!test_bit(S_READY, &il->status)) {
2802                         IL_ERR("Wait for START_ALIVE timeout after %dms.\n",
2803                                jiffies_to_msecs(UCODE_READY_TIMEOUT));
2804                         ret = -ETIMEDOUT;
2805                         goto out_release_irq;
2806                 }
2807         }
2808
2809         /* ucode is running and will send rfkill notifications,
2810          * no need to poll the killswitch state anymore */
2811         cancel_delayed_work(&il->_3945.rfkill_poll);
2812
2813         il->is_open = 1;
2814         D_MAC80211("leave\n");
2815         return 0;
2816
2817 out_release_irq:
2818         il->is_open = 0;
2819         D_MAC80211("leave - failed\n");
2820         return ret;
2821 }
2822
2823 static void
2824 il3945_mac_stop(struct ieee80211_hw *hw)
2825 {
2826         struct il_priv *il = hw->priv;
2827
2828         D_MAC80211("enter\n");
2829
2830         if (!il->is_open) {
2831                 D_MAC80211("leave - skip\n");
2832                 return;
2833         }
2834
2835         il->is_open = 0;
2836
2837         il3945_down(il);
2838
2839         flush_workqueue(il->workqueue);
2840
2841         /* start polling the killswitch state again */
2842         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2843                            round_jiffies_relative(2 * HZ));
2844
2845         D_MAC80211("leave\n");
2846 }
2847
2848 static void
2849 il3945_mac_tx(struct ieee80211_hw *hw,
2850                struct ieee80211_tx_control *control,
2851                struct sk_buff *skb)
2852 {
2853         struct il_priv *il = hw->priv;
2854
2855         D_MAC80211("enter\n");
2856
2857         D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2858              ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2859
2860         if (il3945_tx_skb(il, control->sta, skb))
2861                 dev_kfree_skb_any(skb);
2862
2863         D_MAC80211("leave\n");
2864 }
2865
2866 void
2867 il3945_config_ap(struct il_priv *il)
2868 {
2869         struct ieee80211_vif *vif = il->vif;
2870         int rc = 0;
2871
2872         if (test_bit(S_EXIT_PENDING, &il->status))
2873                 return;
2874
2875         /* The following should be done only at AP bring up */
2876         if (!(il_is_associated(il))) {
2877
2878                 /* RXON - unassoc (to set timing command) */
2879                 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2880                 il3945_commit_rxon(il);
2881
2882                 /* RXON Timing */
2883                 rc = il_send_rxon_timing(il);
2884                 if (rc)
2885                         IL_WARN("C_RXON_TIMING failed - "
2886                                 "Attempting to continue.\n");
2887
2888                 il->staging.assoc_id = 0;
2889
2890                 if (vif->bss_conf.use_short_preamble)
2891                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2892                 else
2893                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2894
2895                 if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2896                         if (vif->bss_conf.use_short_slot)
2897                                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2898                         else
2899                                 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2900                 }
2901                 /* restore RXON assoc */
2902                 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2903                 il3945_commit_rxon(il);
2904         }
2905         il3945_send_beacon_cmd(il);
2906 }
2907
2908 static int
2909 il3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2910                    struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2911                    struct ieee80211_key_conf *key)
2912 {
2913         struct il_priv *il = hw->priv;
2914         int ret = 0;
2915         u8 sta_id = IL_INVALID_STATION;
2916         u8 static_key;
2917
2918         D_MAC80211("enter\n");
2919
2920         if (il3945_mod_params.sw_crypto) {
2921                 D_MAC80211("leave - hwcrypto disabled\n");
2922                 return -EOPNOTSUPP;
2923         }
2924
2925         /*
2926          * To support IBSS RSN, don't program group keys in IBSS, the
2927          * hardware will then not attempt to decrypt the frames.
2928          */
2929         if (vif->type == NL80211_IFTYPE_ADHOC &&
2930             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
2931                 D_MAC80211("leave - IBSS RSN\n");
2932                 return -EOPNOTSUPP;
2933         }
2934
2935         static_key = !il_is_associated(il);
2936
2937         if (!static_key) {
2938                 sta_id = il_sta_id_or_broadcast(il, sta);
2939                 if (sta_id == IL_INVALID_STATION) {
2940                         D_MAC80211("leave - station not found\n");
2941                         return -EINVAL;
2942                 }
2943         }
2944
2945         mutex_lock(&il->mutex);
2946         il_scan_cancel_timeout(il, 100);
2947
2948         switch (cmd) {
2949         case SET_KEY:
2950                 if (static_key)
2951                         ret = il3945_set_static_key(il, key);
2952                 else
2953                         ret = il3945_set_dynamic_key(il, key, sta_id);
2954                 D_MAC80211("enable hwcrypto key\n");
2955                 break;
2956         case DISABLE_KEY:
2957                 if (static_key)
2958                         ret = il3945_remove_static_key(il);
2959                 else
2960                         ret = il3945_clear_sta_key_info(il, sta_id);
2961                 D_MAC80211("disable hwcrypto key\n");
2962                 break;
2963         default:
2964                 ret = -EINVAL;
2965         }
2966
2967         D_MAC80211("leave ret %d\n", ret);
2968         mutex_unlock(&il->mutex);
2969
2970         return ret;
2971 }
2972
2973 static int
2974 il3945_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2975                    struct ieee80211_sta *sta)
2976 {
2977         struct il_priv *il = hw->priv;
2978         struct il3945_sta_priv *sta_priv = (void *)sta->drv_priv;
2979         int ret;
2980         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2981         u8 sta_id;
2982
2983         mutex_lock(&il->mutex);
2984         D_INFO("station %pM\n", sta->addr);
2985         sta_priv->common.sta_id = IL_INVALID_STATION;
2986
2987         ret = il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
2988         if (ret) {
2989                 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
2990                 /* Should we return success if return code is EEXIST ? */
2991                 mutex_unlock(&il->mutex);
2992                 return ret;
2993         }
2994
2995         sta_priv->common.sta_id = sta_id;
2996
2997         /* Initialize rate scaling */
2998         D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
2999         il3945_rs_rate_init(il, sta, sta_id);
3000         mutex_unlock(&il->mutex);
3001
3002         return 0;
3003 }
3004
3005 static void
3006 il3945_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
3007                         unsigned int *total_flags, u64 multicast)
3008 {
3009         struct il_priv *il = hw->priv;
3010         __le32 filter_or = 0, filter_nand = 0;
3011
3012 #define CHK(test, flag) do { \
3013         if (*total_flags & (test))              \
3014                 filter_or |= (flag);            \
3015         else                                    \
3016                 filter_nand |= (flag);          \
3017         } while (0)
3018
3019         D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
3020                    *total_flags);
3021
3022         CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
3023         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3024         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3025
3026 #undef CHK
3027
3028         mutex_lock(&il->mutex);
3029
3030         il->staging.filter_flags &= ~filter_nand;
3031         il->staging.filter_flags |= filter_or;
3032
3033         /*
3034          * Not committing directly because hardware can perform a scan,
3035          * but even if hw is ready, committing here breaks for some reason,
3036          * we'll eventually commit the filter flags change anyway.
3037          */
3038
3039         mutex_unlock(&il->mutex);
3040
3041         /*
3042          * Receiving all multicast frames is always enabled by the
3043          * default flags setup in il_connection_init_rx_config()
3044          * since we currently do not support programming multicast
3045          * filters into the device.
3046          */
3047         *total_flags &=
3048             FIF_OTHER_BSS | FIF_ALLMULTI |
3049             FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3050 }
3051
3052 /*****************************************************************************
3053  *
3054  * sysfs attributes
3055  *
3056  *****************************************************************************/
3057
3058 #ifdef CONFIG_IWLEGACY_DEBUG
3059
3060 /*
3061  * The following adds a new attribute to the sysfs representation
3062  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3063  * used for controlling the debug level.
3064  *
3065  * See the level definitions in iwl for details.
3066  *
3067  * The debug_level being managed using sysfs below is a per device debug
3068  * level that is used instead of the global debug level if it (the per
3069  * device debug level) is set.
3070  */
3071 static ssize_t
3072 il3945_show_debug_level(struct device *d, struct device_attribute *attr,
3073                         char *buf)
3074 {
3075         struct il_priv *il = dev_get_drvdata(d);
3076         return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
3077 }
3078
3079 static ssize_t
3080 il3945_store_debug_level(struct device *d, struct device_attribute *attr,
3081                          const char *buf, size_t count)
3082 {
3083         struct il_priv *il = dev_get_drvdata(d);
3084         unsigned long val;
3085         int ret;
3086
3087         ret = kstrtoul(buf, 0, &val);
3088         if (ret)
3089                 IL_INFO("%s is not in hex or decimal form.\n", buf);
3090         else
3091                 il->debug_level = val;
3092
3093         return strnlen(buf, count);
3094 }
3095
3096 static DEVICE_ATTR(debug_level, 0644, il3945_show_debug_level,
3097                    il3945_store_debug_level);
3098
3099 #endif /* CONFIG_IWLEGACY_DEBUG */
3100
3101 static ssize_t
3102 il3945_show_temperature(struct device *d, struct device_attribute *attr,
3103                         char *buf)
3104 {
3105         struct il_priv *il = dev_get_drvdata(d);
3106
3107         if (!il_is_alive(il))
3108                 return -EAGAIN;
3109
3110         return sprintf(buf, "%d\n", il3945_hw_get_temperature(il));
3111 }
3112
3113 static DEVICE_ATTR(temperature, 0444, il3945_show_temperature, NULL);
3114
3115 static ssize_t
3116 il3945_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
3117 {
3118         struct il_priv *il = dev_get_drvdata(d);
3119         return sprintf(buf, "%d\n", il->tx_power_user_lmt);
3120 }
3121
3122 static ssize_t
3123 il3945_store_tx_power(struct device *d, struct device_attribute *attr,
3124                       const char *buf, size_t count)
3125 {
3126         struct il_priv *il = dev_get_drvdata(d);
3127         char *p = (char *)buf;
3128         u32 val;
3129
3130         val = simple_strtoul(p, &p, 10);
3131         if (p == buf)
3132                 IL_INFO(": %s is not in decimal form.\n", buf);
3133         else
3134                 il3945_hw_reg_set_txpower(il, val);
3135
3136         return count;
3137 }
3138
3139 static DEVICE_ATTR(tx_power, 0644, il3945_show_tx_power, il3945_store_tx_power);
3140
3141 static ssize_t
3142 il3945_show_flags(struct device *d, struct device_attribute *attr, char *buf)
3143 {
3144         struct il_priv *il = dev_get_drvdata(d);
3145
3146         return sprintf(buf, "0x%04X\n", il->active.flags);
3147 }
3148
3149 static ssize_t
3150 il3945_store_flags(struct device *d, struct device_attribute *attr,
3151                    const char *buf, size_t count)
3152 {
3153         struct il_priv *il = dev_get_drvdata(d);
3154         u32 flags = simple_strtoul(buf, NULL, 0);
3155
3156         mutex_lock(&il->mutex);
3157         if (le32_to_cpu(il->staging.flags) != flags) {
3158                 /* Cancel any currently running scans... */
3159                 if (il_scan_cancel_timeout(il, 100))
3160                         IL_WARN("Could not cancel scan.\n");
3161                 else {
3162                         D_INFO("Committing rxon.flags = 0x%04X\n", flags);
3163                         il->staging.flags = cpu_to_le32(flags);
3164                         il3945_commit_rxon(il);
3165                 }
3166         }
3167         mutex_unlock(&il->mutex);
3168
3169         return count;
3170 }
3171
3172 static DEVICE_ATTR(flags, 0644, il3945_show_flags, il3945_store_flags);
3173
3174 static ssize_t
3175 il3945_show_filter_flags(struct device *d, struct device_attribute *attr,
3176                          char *buf)
3177 {
3178         struct il_priv *il = dev_get_drvdata(d);
3179
3180         return sprintf(buf, "0x%04X\n", le32_to_cpu(il->active.filter_flags));
3181 }
3182
3183 static ssize_t
3184 il3945_store_filter_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 filter_flags = simple_strtoul(buf, NULL, 0);
3189
3190         mutex_lock(&il->mutex);
3191         if (le32_to_cpu(il->staging.filter_flags) != filter_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.filter_flags = " "0x%04X\n",
3197                                filter_flags);
3198                         il->staging.filter_flags = cpu_to_le32(filter_flags);
3199                         il3945_commit_rxon(il);
3200                 }
3201         }
3202         mutex_unlock(&il->mutex);
3203
3204         return count;
3205 }
3206
3207 static DEVICE_ATTR(filter_flags, 0644, il3945_show_filter_flags,
3208                    il3945_store_filter_flags);
3209
3210 static ssize_t
3211 il3945_show_measurement(struct device *d, struct device_attribute *attr,
3212                         char *buf)
3213 {
3214         struct il_priv *il = dev_get_drvdata(d);
3215         struct il_spectrum_notification measure_report;
3216         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3217         u8 *data = (u8 *) &measure_report;
3218         unsigned long flags;
3219
3220         spin_lock_irqsave(&il->lock, flags);
3221         if (!(il->measurement_status & MEASUREMENT_READY)) {
3222                 spin_unlock_irqrestore(&il->lock, flags);
3223                 return 0;
3224         }
3225         memcpy(&measure_report, &il->measure_report, size);
3226         il->measurement_status = 0;
3227         spin_unlock_irqrestore(&il->lock, flags);
3228
3229         while (size && PAGE_SIZE - len) {
3230                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3231                                    PAGE_SIZE - len, true);
3232                 len = strlen(buf);
3233                 if (PAGE_SIZE - len)
3234                         buf[len++] = '\n';
3235
3236                 ofs += 16;
3237                 size -= min(size, 16U);
3238         }
3239
3240         return len;
3241 }
3242
3243 static ssize_t
3244 il3945_store_measurement(struct device *d, struct device_attribute *attr,
3245                          const char *buf, size_t count)
3246 {
3247         struct il_priv *il = dev_get_drvdata(d);
3248         struct ieee80211_measurement_params params = {
3249                 .channel = le16_to_cpu(il->active.channel),
3250                 .start_time = cpu_to_le64(il->_3945.last_tsf),
3251                 .duration = cpu_to_le16(1),
3252         };
3253         u8 type = IL_MEASURE_BASIC;
3254         u8 buffer[32];
3255         u8 channel;
3256
3257         if (count) {
3258                 char *p = buffer;
3259                 strlcpy(buffer, buf, sizeof(buffer));
3260                 channel = simple_strtoul(p, NULL, 0);
3261                 if (channel)
3262                         params.channel = channel;
3263
3264                 p = buffer;
3265                 while (*p && *p != ' ')
3266                         p++;
3267                 if (*p)
3268                         type = simple_strtoul(p + 1, NULL, 0);
3269         }
3270
3271         D_INFO("Invoking measurement of type %d on " "channel %d (for '%s')\n",
3272                type, params.channel, buf);
3273         il3945_get_measurement(il, &params, type);
3274
3275         return count;
3276 }
3277
3278 static DEVICE_ATTR(measurement, 0600, il3945_show_measurement,
3279                    il3945_store_measurement);
3280
3281 static ssize_t
3282 il3945_store_retry_rate(struct device *d, struct device_attribute *attr,
3283                         const char *buf, size_t count)
3284 {
3285         struct il_priv *il = dev_get_drvdata(d);
3286
3287         il->retry_rate = simple_strtoul(buf, NULL, 0);
3288         if (il->retry_rate <= 0)
3289                 il->retry_rate = 1;
3290
3291         return count;
3292 }
3293
3294 static ssize_t
3295 il3945_show_retry_rate(struct device *d, struct device_attribute *attr,
3296                        char *buf)
3297 {
3298         struct il_priv *il = dev_get_drvdata(d);
3299         return sprintf(buf, "%d", il->retry_rate);
3300 }
3301
3302 static DEVICE_ATTR(retry_rate, 0600, il3945_show_retry_rate,
3303                    il3945_store_retry_rate);
3304
3305 static ssize_t
3306 il3945_show_channels(struct device *d, struct device_attribute *attr, char *buf)
3307 {
3308         /* all this shit doesn't belong into sysfs anyway */
3309         return 0;
3310 }
3311
3312 static DEVICE_ATTR(channels, 0400, il3945_show_channels, NULL);
3313
3314 static ssize_t
3315 il3945_show_antenna(struct device *d, struct device_attribute *attr, char *buf)
3316 {
3317         struct il_priv *il = dev_get_drvdata(d);
3318
3319         if (!il_is_alive(il))
3320                 return -EAGAIN;
3321
3322         return sprintf(buf, "%d\n", il3945_mod_params.antenna);
3323 }
3324
3325 static ssize_t
3326 il3945_store_antenna(struct device *d, struct device_attribute *attr,
3327                      const char *buf, size_t count)
3328 {
3329         struct il_priv *il __maybe_unused = dev_get_drvdata(d);
3330         int ant;
3331
3332         if (count == 0)
3333                 return 0;
3334
3335         if (sscanf(buf, "%1i", &ant) != 1) {
3336                 D_INFO("not in hex or decimal form.\n");
3337                 return count;
3338         }
3339
3340         if (ant >= 0 && ant <= 2) {
3341                 D_INFO("Setting antenna select to %d.\n", ant);
3342                 il3945_mod_params.antenna = (enum il3945_antenna)ant;
3343         } else
3344                 D_INFO("Bad antenna select value %d.\n", ant);
3345
3346         return count;
3347 }
3348
3349 static DEVICE_ATTR(antenna, 0644, il3945_show_antenna, il3945_store_antenna);
3350
3351 static ssize_t
3352 il3945_show_status(struct device *d, struct device_attribute *attr, char *buf)
3353 {
3354         struct il_priv *il = dev_get_drvdata(d);
3355         if (!il_is_alive(il))
3356                 return -EAGAIN;
3357         return sprintf(buf, "0x%08x\n", (int)il->status);
3358 }
3359
3360 static DEVICE_ATTR(status, 0444, il3945_show_status, NULL);
3361
3362 static ssize_t
3363 il3945_dump_error_log(struct device *d, struct device_attribute *attr,
3364                       const char *buf, size_t count)
3365 {
3366         struct il_priv *il = dev_get_drvdata(d);
3367         char *p = (char *)buf;
3368
3369         if (p[0] == '1')
3370                 il3945_dump_nic_error_log(il);
3371
3372         return strnlen(buf, count);
3373 }
3374
3375 static DEVICE_ATTR(dump_errors, 0200, NULL, il3945_dump_error_log);
3376
3377 /*****************************************************************************
3378  *
3379  * driver setup and tear down
3380  *
3381  *****************************************************************************/
3382
3383 static void
3384 il3945_setup_deferred_work(struct il_priv *il)
3385 {
3386         il->workqueue = create_singlethread_workqueue(DRV_NAME);
3387
3388         init_waitqueue_head(&il->wait_command_queue);
3389
3390         INIT_WORK(&il->restart, il3945_bg_restart);
3391         INIT_WORK(&il->rx_replenish, il3945_bg_rx_replenish);
3392         INIT_DELAYED_WORK(&il->init_alive_start, il3945_bg_init_alive_start);
3393         INIT_DELAYED_WORK(&il->alive_start, il3945_bg_alive_start);
3394         INIT_DELAYED_WORK(&il->_3945.rfkill_poll, il3945_rfkill_poll);
3395
3396         il_setup_scan_deferred_work(il);
3397
3398         il3945_hw_setup_deferred_work(il);
3399
3400         timer_setup(&il->watchdog, il_bg_watchdog, 0);
3401
3402         tasklet_init(&il->irq_tasklet,
3403                      il3945_irq_tasklet,
3404                      (unsigned long)il);
3405 }
3406
3407 static void
3408 il3945_cancel_deferred_work(struct il_priv *il)
3409 {
3410         il3945_hw_cancel_deferred_work(il);
3411
3412         cancel_delayed_work_sync(&il->init_alive_start);
3413         cancel_delayed_work(&il->alive_start);
3414
3415         il_cancel_scan_deferred_work(il);
3416 }
3417
3418 static struct attribute *il3945_sysfs_entries[] = {
3419         &dev_attr_antenna.attr,
3420         &dev_attr_channels.attr,
3421         &dev_attr_dump_errors.attr,
3422         &dev_attr_flags.attr,
3423         &dev_attr_filter_flags.attr,
3424         &dev_attr_measurement.attr,
3425         &dev_attr_retry_rate.attr,
3426         &dev_attr_status.attr,
3427         &dev_attr_temperature.attr,
3428         &dev_attr_tx_power.attr,
3429 #ifdef CONFIG_IWLEGACY_DEBUG
3430         &dev_attr_debug_level.attr,
3431 #endif
3432         NULL
3433 };
3434
3435 static const struct attribute_group il3945_attribute_group = {
3436         .name = NULL,           /* put in device directory */
3437         .attrs = il3945_sysfs_entries,
3438 };
3439
3440 static struct ieee80211_ops il3945_mac_ops __ro_after_init = {
3441         .tx = il3945_mac_tx,
3442         .start = il3945_mac_start,
3443         .stop = il3945_mac_stop,
3444         .add_interface = il_mac_add_interface,
3445         .remove_interface = il_mac_remove_interface,
3446         .change_interface = il_mac_change_interface,
3447         .config = il_mac_config,
3448         .configure_filter = il3945_configure_filter,
3449         .set_key = il3945_mac_set_key,
3450         .conf_tx = il_mac_conf_tx,
3451         .reset_tsf = il_mac_reset_tsf,
3452         .bss_info_changed = il_mac_bss_info_changed,
3453         .hw_scan = il_mac_hw_scan,
3454         .sta_add = il3945_mac_sta_add,
3455         .sta_remove = il_mac_sta_remove,
3456         .tx_last_beacon = il_mac_tx_last_beacon,
3457         .flush = il_mac_flush,
3458 };
3459
3460 static int
3461 il3945_init_drv(struct il_priv *il)
3462 {
3463         int ret;
3464         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
3465
3466         il->retry_rate = 1;
3467         il->beacon_skb = NULL;
3468
3469         spin_lock_init(&il->sta_lock);
3470         spin_lock_init(&il->hcmd_lock);
3471
3472         INIT_LIST_HEAD(&il->free_frames);
3473
3474         mutex_init(&il->mutex);
3475
3476         il->ieee_channels = NULL;
3477         il->ieee_rates = NULL;
3478         il->band = NL80211_BAND_2GHZ;
3479
3480         il->iw_mode = NL80211_IFTYPE_STATION;
3481         il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
3482
3483         /* initialize force reset */
3484         il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
3485
3486         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3487                 IL_WARN("Unsupported EEPROM version: 0x%04X\n",
3488                         eeprom->version);
3489                 ret = -EINVAL;
3490                 goto err;
3491         }
3492         ret = il_init_channel_map(il);
3493         if (ret) {
3494                 IL_ERR("initializing regulatory failed: %d\n", ret);
3495                 goto err;
3496         }
3497
3498         /* Set up txpower settings in driver for all channels */
3499         if (il3945_txpower_set_from_eeprom(il)) {
3500                 ret = -EIO;
3501                 goto err_free_channel_map;
3502         }
3503
3504         ret = il_init_geos(il);
3505         if (ret) {
3506                 IL_ERR("initializing geos failed: %d\n", ret);
3507                 goto err_free_channel_map;
3508         }
3509         il3945_init_hw_rates(il, il->ieee_rates);
3510
3511         return 0;
3512
3513 err_free_channel_map:
3514         il_free_channel_map(il);
3515 err:
3516         return ret;
3517 }
3518
3519 #define IL3945_MAX_PROBE_REQUEST        200
3520
3521 static int
3522 il3945_setup_mac(struct il_priv *il)
3523 {
3524         int ret;
3525         struct ieee80211_hw *hw = il->hw;
3526
3527         hw->rate_control_algorithm = "iwl-3945-rs";
3528         hw->sta_data_size = sizeof(struct il3945_sta_priv);
3529         hw->vif_data_size = sizeof(struct il_vif_priv);
3530
3531         /* Tell mac80211 our characteristics */
3532         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
3533         ieee80211_hw_set(hw, SUPPORTS_PS);
3534         ieee80211_hw_set(hw, SIGNAL_DBM);
3535         ieee80211_hw_set(hw, SPECTRUM_MGMT);
3536
3537         hw->wiphy->interface_modes =
3538             BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
3539
3540         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
3541         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
3542                                        REGULATORY_DISABLE_BEACON_HINTS;
3543
3544         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
3545
3546         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3547         /* we create the 802.11 header and a zero-length SSID element */
3548         hw->wiphy->max_scan_ie_len = IL3945_MAX_PROBE_REQUEST - 24 - 2;
3549
3550         /* Default value; 4 EDCA QOS priorities */
3551         hw->queues = 4;
3552
3553         if (il->bands[NL80211_BAND_2GHZ].n_channels)
3554                 il->hw->wiphy->bands[NL80211_BAND_2GHZ] =
3555                     &il->bands[NL80211_BAND_2GHZ];
3556
3557         if (il->bands[NL80211_BAND_5GHZ].n_channels)
3558                 il->hw->wiphy->bands[NL80211_BAND_5GHZ] =
3559                     &il->bands[NL80211_BAND_5GHZ];
3560
3561         il_leds_init(il);
3562
3563         wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
3564
3565         ret = ieee80211_register_hw(il->hw);
3566         if (ret) {
3567                 IL_ERR("Failed to register hw (error %d)\n", ret);
3568                 return ret;
3569         }
3570         il->mac80211_registered = 1;
3571
3572         return 0;
3573 }
3574
3575 static int
3576 il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3577 {
3578         int err = 0;
3579         struct il_priv *il;
3580         struct ieee80211_hw *hw;
3581         struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
3582         struct il3945_eeprom *eeprom;
3583         unsigned long flags;
3584
3585         /***********************
3586          * 1. Allocating HW data
3587          * ********************/
3588
3589         hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il3945_mac_ops);
3590         if (!hw) {
3591                 err = -ENOMEM;
3592                 goto out;
3593         }
3594         il = hw->priv;
3595         il->hw = hw;
3596         SET_IEEE80211_DEV(hw, &pdev->dev);
3597
3598         il->cmd_queue = IL39_CMD_QUEUE_NUM;
3599
3600         D_INFO("*** LOAD DRIVER ***\n");
3601         il->cfg = cfg;
3602         il->ops = &il3945_ops;
3603 #ifdef CONFIG_IWLEGACY_DEBUGFS
3604         il->debugfs_ops = &il3945_debugfs_ops;
3605 #endif
3606         il->pci_dev = pdev;
3607         il->inta_mask = CSR_INI_SET_MASK;
3608
3609         /***************************
3610          * 2. Initializing PCI bus
3611          * *************************/
3612         pci_disable_link_state(pdev,
3613                                PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3614                                PCIE_LINK_STATE_CLKPM);
3615
3616         if (pci_enable_device(pdev)) {
3617                 err = -ENODEV;
3618                 goto out_ieee80211_free_hw;
3619         }
3620
3621         pci_set_master(pdev);
3622
3623         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3624         if (!err)
3625                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3626         if (err) {
3627                 IL_WARN("No suitable DMA available.\n");
3628                 goto out_pci_disable_device;
3629         }
3630
3631         pci_set_drvdata(pdev, il);
3632         err = pci_request_regions(pdev, DRV_NAME);
3633         if (err)
3634                 goto out_pci_disable_device;
3635
3636         /***********************
3637          * 3. Read REV Register
3638          * ********************/
3639         il->hw_base = pci_ioremap_bar(pdev, 0);
3640         if (!il->hw_base) {
3641                 err = -ENODEV;
3642                 goto out_pci_release_regions;
3643         }
3644
3645         D_INFO("pci_resource_len = 0x%08llx\n",
3646                (unsigned long long)pci_resource_len(pdev, 0));
3647         D_INFO("pci_resource_base = %p\n", il->hw_base);
3648
3649         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3650          * PCI Tx retries from interfering with C3 CPU state */
3651         pci_write_config_byte(pdev, 0x41, 0x00);
3652
3653         /* these spin locks will be used in apm_init and EEPROM access
3654          * we should init now
3655          */
3656         spin_lock_init(&il->reg_lock);
3657         spin_lock_init(&il->lock);
3658
3659         /*
3660          * stop and reset the on-board processor just in case it is in a
3661          * strange state ... like being left stranded by a primary kernel
3662          * and this is now the kdump kernel trying to start up
3663          */
3664         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3665
3666         /***********************
3667          * 4. Read EEPROM
3668          * ********************/
3669
3670         /* Read the EEPROM */
3671         err = il_eeprom_init(il);
3672         if (err) {
3673                 IL_ERR("Unable to init EEPROM\n");
3674                 goto out_iounmap;
3675         }
3676         /* MAC Address location in EEPROM same for 3945/4965 */
3677         eeprom = (struct il3945_eeprom *)il->eeprom;
3678         D_INFO("MAC address: %pM\n", eeprom->mac_address);
3679         SET_IEEE80211_PERM_ADDR(il->hw, eeprom->mac_address);
3680
3681         /***********************
3682          * 5. Setup HW Constants
3683          * ********************/
3684         /* Device-specific setup */
3685         err = il3945_hw_set_hw_params(il);
3686         if (err) {
3687                 IL_ERR("failed to set hw settings\n");
3688                 goto out_eeprom_free;
3689         }
3690
3691         /***********************
3692          * 6. Setup il
3693          * ********************/
3694
3695         err = il3945_init_drv(il);
3696         if (err) {
3697                 IL_ERR("initializing driver failed\n");
3698                 goto out_unset_hw_params;
3699         }
3700
3701         IL_INFO("Detected Intel Wireless WiFi Link %s\n", il->cfg->name);
3702
3703         /***********************
3704          * 7. Setup Services
3705          * ********************/
3706
3707         spin_lock_irqsave(&il->lock, flags);
3708         il_disable_interrupts(il);
3709         spin_unlock_irqrestore(&il->lock, flags);
3710
3711         pci_enable_msi(il->pci_dev);
3712
3713         err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
3714         if (err) {
3715                 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
3716                 goto out_disable_msi;
3717         }
3718
3719         err = sysfs_create_group(&pdev->dev.kobj, &il3945_attribute_group);
3720         if (err) {
3721                 IL_ERR("failed to create sysfs device attributes\n");
3722                 goto out_release_irq;
3723         }
3724
3725         il_set_rxon_channel(il, &il->bands[NL80211_BAND_2GHZ].channels[5]);
3726         il3945_setup_deferred_work(il);
3727         il3945_setup_handlers(il);
3728         il_power_initialize(il);
3729
3730         /*********************************
3731          * 8. Setup and Register mac80211
3732          * *******************************/
3733
3734         il_enable_interrupts(il);
3735
3736         err = il3945_setup_mac(il);
3737         if (err)
3738                 goto out_remove_sysfs;
3739
3740         il_dbgfs_register(il, DRV_NAME);
3741
3742         /* Start monitoring the killswitch */
3743         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, 2 * HZ);
3744
3745         return 0;
3746
3747 out_remove_sysfs:
3748         destroy_workqueue(il->workqueue);
3749         il->workqueue = NULL;
3750         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3751 out_release_irq:
3752         free_irq(il->pci_dev->irq, il);
3753 out_disable_msi:
3754         pci_disable_msi(il->pci_dev);
3755         il_free_geos(il);
3756         il_free_channel_map(il);
3757 out_unset_hw_params:
3758         il3945_unset_hw_params(il);
3759 out_eeprom_free:
3760         il_eeprom_free(il);
3761 out_iounmap:
3762         iounmap(il->hw_base);
3763 out_pci_release_regions:
3764         pci_release_regions(pdev);
3765 out_pci_disable_device:
3766         pci_disable_device(pdev);
3767 out_ieee80211_free_hw:
3768         ieee80211_free_hw(il->hw);
3769 out:
3770         return err;
3771 }
3772
3773 static void
3774 il3945_pci_remove(struct pci_dev *pdev)
3775 {
3776         struct il_priv *il = pci_get_drvdata(pdev);
3777         unsigned long flags;
3778
3779         if (!il)
3780                 return;
3781
3782         D_INFO("*** UNLOAD DRIVER ***\n");
3783
3784         il_dbgfs_unregister(il);
3785
3786         set_bit(S_EXIT_PENDING, &il->status);
3787
3788         il_leds_exit(il);
3789
3790         if (il->mac80211_registered) {
3791                 ieee80211_unregister_hw(il->hw);
3792                 il->mac80211_registered = 0;
3793         } else {
3794                 il3945_down(il);
3795         }
3796
3797         /*
3798          * Make sure device is reset to low power before unloading driver.
3799          * This may be redundant with il_down(), but there are paths to
3800          * run il_down() without calling apm_ops.stop(), and there are
3801          * paths to avoid running il_down() at all before leaving driver.
3802          * This (inexpensive) call *makes sure* device is reset.
3803          */
3804         il_apm_stop(il);
3805
3806         /* make sure we flush any pending irq or
3807          * tasklet for the driver
3808          */
3809         spin_lock_irqsave(&il->lock, flags);
3810         il_disable_interrupts(il);
3811         spin_unlock_irqrestore(&il->lock, flags);
3812
3813         il3945_synchronize_irq(il);
3814
3815         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3816
3817         cancel_delayed_work_sync(&il->_3945.rfkill_poll);
3818
3819         il3945_dealloc_ucode_pci(il);
3820
3821         if (il->rxq.bd)
3822                 il3945_rx_queue_free(il, &il->rxq);
3823         il3945_hw_txq_ctx_free(il);
3824
3825         il3945_unset_hw_params(il);
3826
3827         /*netif_stop_queue(dev); */
3828         flush_workqueue(il->workqueue);
3829
3830         /* ieee80211_unregister_hw calls il3945_mac_stop, which flushes
3831          * il->workqueue... so we can't take down the workqueue
3832          * until now... */
3833         destroy_workqueue(il->workqueue);
3834         il->workqueue = NULL;
3835
3836         free_irq(pdev->irq, il);
3837         pci_disable_msi(pdev);
3838
3839         iounmap(il->hw_base);
3840         pci_release_regions(pdev);
3841         pci_disable_device(pdev);
3842
3843         il_free_channel_map(il);
3844         il_free_geos(il);
3845         kfree(il->scan_cmd);
3846         dev_kfree_skb(il->beacon_skb);
3847         ieee80211_free_hw(il->hw);
3848 }
3849
3850 /*****************************************************************************
3851  *
3852  * driver and module entry point
3853  *
3854  *****************************************************************************/
3855
3856 static struct pci_driver il3945_driver = {
3857         .name = DRV_NAME,
3858         .id_table = il3945_hw_card_ids,
3859         .probe = il3945_pci_probe,
3860         .remove = il3945_pci_remove,
3861         .driver.pm = IL_LEGACY_PM_OPS,
3862 };
3863
3864 static int __init
3865 il3945_init(void)
3866 {
3867
3868         int ret;
3869         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3870         pr_info(DRV_COPYRIGHT "\n");
3871
3872         /*
3873          * Disabling hardware scan means that mac80211 will perform scans
3874          * "the hard way", rather than using device's scan.
3875          */
3876         if (il3945_mod_params.disable_hw_scan) {
3877                 pr_info("hw_scan is disabled\n");
3878                 il3945_mac_ops.hw_scan = NULL;
3879         }
3880
3881         ret = il3945_rate_control_register();
3882         if (ret) {
3883                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3884                 return ret;
3885         }
3886
3887         ret = pci_register_driver(&il3945_driver);
3888         if (ret) {
3889                 pr_err("Unable to initialize PCI module\n");
3890                 goto error_register;
3891         }
3892
3893         return ret;
3894
3895 error_register:
3896         il3945_rate_control_unregister();
3897         return ret;
3898 }
3899
3900 static void __exit
3901 il3945_exit(void)
3902 {
3903         pci_unregister_driver(&il3945_driver);
3904         il3945_rate_control_unregister();
3905 }
3906
3907 /*(DEBLOBBED)*/
3908
3909 module_param_named(antenna, il3945_mod_params.antenna, int, 0444);
3910 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3911 module_param_named(swcrypto, il3945_mod_params.sw_crypto, int, 0444);
3912 MODULE_PARM_DESC(swcrypto, "using software crypto (default 1 [software])");
3913 module_param_named(disable_hw_scan, il3945_mod_params.disable_hw_scan, int,
3914                    0444);
3915 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
3916 #ifdef CONFIG_IWLEGACY_DEBUG
3917 module_param_named(debug, il_debug_level, uint, 0644);
3918 MODULE_PARM_DESC(debug, "debug output mask");
3919 #endif
3920 module_param_named(fw_restart, il3945_mod_params.restart_fw, int, 0444);
3921 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3922
3923 module_exit(il3945_exit);
3924 module_init(il3945_init);