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         int ret = -EOPNOTSUPP;
 232
 233         return ret;
 234 }
 235
 236 static int
 237 il3945_set_static_key(struct il_priv *il, struct ieee80211_key_conf *key)
 238 {
 239         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 240             key->cipher == WLAN_CIPHER_SUITE_WEP104)
 241                 return -EOPNOTSUPP;
 242
 243         IL_ERR("Static key invalid: cipher %x\n", key->cipher);
 244         return -EINVAL;
 245 }
 246
 247 static void
 248 il3945_clear_free_frames(struct il_priv *il)
 249 {
 250         struct list_head *element;
 251
 252         D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
 253
 254         while (!list_empty(&il->free_frames)) {
 255                 element = il->free_frames.next;
 256                 list_del(element);
 257                 kfree(list_entry(element, struct il3945_frame, list));
 258                 il->frames_count--;
 259         }
 260
 261         if (il->frames_count) {
 262                 IL_WARN("%d frames still in use.  Did we lose one?\n",
 263                         il->frames_count);
 264                 il->frames_count = 0;
 265         }
 266 }
 267
 268 static struct il3945_frame *
 269 il3945_get_free_frame(struct il_priv *il)
 270 {
 271         struct il3945_frame *frame;
 272         struct list_head *element;
 273         if (list_empty(&il->free_frames)) {
 274                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 275                 if (!frame) {
 276                         IL_ERR("Could not allocate frame!\n");
 277                         return NULL;
 278                 }
 279
 280                 il->frames_count++;
 281                 return frame;
 282         }
 283
 284         element = il->free_frames.next;
 285         list_del(element);
 286         return list_entry(element, struct il3945_frame, list);
 287 }
 288
 289 static void
 290 il3945_free_frame(struct il_priv *il, struct il3945_frame *frame)
 291 {
 292         memset(frame, 0, sizeof(*frame));
 293         list_add(&frame->list, &il->free_frames);
 294 }
 295
 296 unsigned int
 297 il3945_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
 298                          int left)
 299 {
 300
 301         if (!il_is_associated(il) || !il->beacon_skb)
 302                 return 0;
 303
 304         if (il->beacon_skb->len > left)
 305                 return 0;
 306
 307         memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
 308
 309         return il->beacon_skb->len;
 310 }
 311
 312 static int
 313 il3945_send_beacon_cmd(struct il_priv *il)
 314 {
 315         struct il3945_frame *frame;
 316         unsigned int frame_size;
 317         int rc;
 318         u8 rate;
 319
 320         frame = il3945_get_free_frame(il);
 321
 322         if (!frame) {
 323                 IL_ERR("Could not obtain free frame buffer for beacon "
 324                        "command.\n");
 325                 return -ENOMEM;
 326         }
 327
 328         rate = il_get_lowest_plcp(il);
 329
 330         frame_size = il3945_hw_get_beacon_cmd(il, frame, rate);
 331
 332         rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
 333
 334         il3945_free_frame(il, frame);
 335
 336         return rc;
 337 }
 338
 339 static void
 340 il3945_unset_hw_params(struct il_priv *il)
 341 {
 342         if (il->_3945.shared_virt)
 343                 dma_free_coherent(&il->pci_dev->dev,
 344                                   sizeof(struct il3945_shared),
 345                                   il->_3945.shared_virt, il->_3945.shared_phys);
 346 }
 347
 348 static void
 349 il3945_build_tx_cmd_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
 350                              struct il_device_cmd *cmd,
 351                              struct sk_buff *skb_frag, int sta_id)
 352 {
 353         struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 354         struct il_hw_key *keyinfo = &il->stations[sta_id].keyinfo;
 355
 356         tx_cmd->sec_ctl = 0;
 357
 358         switch (keyinfo->cipher) {
 359         case WLAN_CIPHER_SUITE_CCMP:
 360                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 361                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 362                 D_TX("tx_cmd with AES hwcrypto\n");
 363                 break;
 364
 365         case WLAN_CIPHER_SUITE_TKIP:
 366                 break;
 367
 368         case WLAN_CIPHER_SUITE_WEP104:
 369                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 370                 /* fall through */
 371         case WLAN_CIPHER_SUITE_WEP40:
 372                 tx_cmd->sec_ctl |=
 373                     TX_CMD_SEC_WEP | (info->control.hw_key->
 374                                       hw_key_idx & TX_CMD_SEC_MSK) <<
 375                     TX_CMD_SEC_SHIFT;
 376
 377                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 378
 379                 D_TX("Configuring packet for WEP encryption " "with key %d\n",
 380                      info->control.hw_key->hw_key_idx);
 381                 break;
 382
 383         default:
 384                 IL_ERR("Unknown encode cipher %x\n", keyinfo->cipher);
 385                 break;
 386         }
 387 }
 388
 389 /*
 390  * handle build C_TX command notification.
 391  */
 392 static void
 393 il3945_build_tx_cmd_basic(struct il_priv *il, struct il_device_cmd *cmd,
 394                           struct ieee80211_tx_info *info,
 395                           struct ieee80211_hdr *hdr, u8 std_id)
 396 {
 397         struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 398         __le32 tx_flags = tx_cmd->tx_flags;
 399         __le16 fc = hdr->frame_control;
 400
 401         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 402         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 403                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 404                 if (ieee80211_is_mgmt(fc))
 405                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 406                 if (ieee80211_is_probe_resp(fc) &&
 407                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 408                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 409         } else {
 410                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 411                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 412         }
 413
 414         tx_cmd->sta_id = std_id;
 415         if (ieee80211_has_morefrags(fc))
 416                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 417
 418         if (ieee80211_is_data_qos(fc)) {
 419                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 420                 tx_cmd->tid_tspec = qc[0] & 0xf;
 421                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 422         } else {
 423                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 424         }
 425
 426         il_tx_cmd_protection(il, info, fc, &tx_flags);
 427
 428         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 429         if (ieee80211_is_mgmt(fc)) {
 430                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 431                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 432                 else
 433                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 434         } else {
 435                 tx_cmd->timeout.pm_frame_timeout = 0;
 436         }
 437
 438         tx_cmd->driver_txop = 0;
 439         tx_cmd->tx_flags = tx_flags;
 440         tx_cmd->next_frame_len = 0;
 441 }
 442
 443 /*
 444  * start C_TX command process
 445  */
 446 static int
 447 il3945_tx_skb(struct il_priv *il,
 448               struct ieee80211_sta *sta,
 449               struct sk_buff *skb)
 450 {
 451         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 452         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 453         struct il3945_tx_cmd *tx_cmd;
 454         struct il_tx_queue *txq = NULL;
 455         struct il_queue *q = NULL;
 456         struct il_device_cmd *out_cmd;
 457         struct il_cmd_meta *out_meta;
 458         dma_addr_t phys_addr;
 459         dma_addr_t txcmd_phys;
 460         int txq_id = skb_get_queue_mapping(skb);
 461         u16 len, idx, hdr_len;
 462         u16 firstlen, secondlen;
 463         u8 sta_id;
 464         u8 tid = 0;
 465         __le16 fc;
 466         u8 wait_write_ptr = 0;
 467         unsigned long flags;
 468
 469         spin_lock_irqsave(&il->lock, flags);
 470         if (il_is_rfkill(il)) {
 471                 D_DROP("Dropping - RF KILL\n");
 472                 goto drop_unlock;
 473         }
 474
 475         if ((ieee80211_get_tx_rate(il->hw, info)->hw_value & 0xFF) ==
 476             IL_INVALID_RATE) {
 477                 IL_ERR("ERROR: No TX rate available.\n");
 478                 goto drop_unlock;
 479         }
 480
 481         fc = hdr->frame_control;
 482
 483 #ifdef CONFIG_IWLEGACY_DEBUG
 484         if (ieee80211_is_auth(fc))
 485                 D_TX("Sending AUTH frame\n");
 486         else if (ieee80211_is_assoc_req(fc))
 487                 D_TX("Sending ASSOC frame\n");
 488         else if (ieee80211_is_reassoc_req(fc))
 489                 D_TX("Sending REASSOC frame\n");
 490 #endif
 491
 492         spin_unlock_irqrestore(&il->lock, flags);
 493
 494         hdr_len = ieee80211_hdrlen(fc);
 495
 496         /* Find idx into station table for destination station */
 497         sta_id = il_sta_id_or_broadcast(il, sta);
 498         if (sta_id == IL_INVALID_STATION) {
 499                 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
 500                 goto drop;
 501         }
 502
 503         D_RATE("station Id %d\n", sta_id);
 504
 505         if (ieee80211_is_data_qos(fc)) {
 506                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 507                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 508                 if (unlikely(tid >= MAX_TID_COUNT))
 509                         goto drop;
 510         }
 511
 512         /* Descriptor for chosen Tx queue */
 513         txq = &il->txq[txq_id];
 514         q = &txq->q;
 515
 516         if ((il_queue_space(q) < q->high_mark))
 517                 goto drop;
 518
 519         spin_lock_irqsave(&il->lock, flags);
 520
 521         idx = il_get_cmd_idx(q, q->write_ptr, 0);
 522
 523         txq->skbs[q->write_ptr] = skb;
 524
 525         /* Init first empty entry in queue's array of Tx/cmd buffers */
 526         out_cmd = txq->cmd[idx];
 527         out_meta = &txq->meta[idx];
 528         tx_cmd = (struct il3945_tx_cmd *)out_cmd->cmd.payload;
 529         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 530         memset(tx_cmd, 0, sizeof(*tx_cmd));
 531
 532         /*
 533          * Set up the Tx-command (not MAC!) header.
 534          * Store the chosen Tx queue and TFD idx within the sequence field;
 535          * after Tx, uCode's Tx response will return this value so driver can
 536          * locate the frame within the tx queue and do post-tx processing.
 537          */
 538         out_cmd->hdr.cmd = C_TX;
 539         out_cmd->hdr.sequence =
 540             cpu_to_le16((u16)
 541                         (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
 542
 543         /* Copy MAC header from skb into command buffer */
 544         memcpy(tx_cmd->hdr, hdr, hdr_len);
 545
 546         if (info->control.hw_key)
 547                 il3945_build_tx_cmd_hwcrypto(il, info, out_cmd, skb, sta_id);
 548
 549         /* TODO need this for burst mode later on */
 550         il3945_build_tx_cmd_basic(il, out_cmd, info, hdr, sta_id);
 551
 552         il3945_hw_build_tx_cmd_rate(il, out_cmd, info, hdr, sta_id);
 553
 554         /* Total # bytes to be transmitted */
 555         tx_cmd->len = cpu_to_le16((u16) skb->len);
 556
 557         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 558         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 559
 560         /*
 561          * Use the first empty entry in this queue's command buffer array
 562          * to contain the Tx command and MAC header concatenated together
 563          * (payload data will be in another buffer).
 564          * Size of this varies, due to varying MAC header length.
 565          * If end is not dword aligned, we'll have 2 extra bytes at the end
 566          * of the MAC header (device reads on dword boundaries).
 567          * We'll tell device about this padding later.
 568          */
 569         len =
 570             sizeof(struct il3945_tx_cmd) + sizeof(struct il_cmd_header) +
 571             hdr_len;
 572         firstlen = (len + 3) & ~3;
 573
 574         /* Physical address of this Tx command's header (not MAC header!),
 575          * within command buffer array. */
 576         txcmd_phys =
 577             pci_map_single(il->pci_dev, &out_cmd->hdr, firstlen,
 578                            PCI_DMA_TODEVICE);
 579         if (unlikely(pci_dma_mapping_error(il->pci_dev, txcmd_phys)))
 580                 goto drop_unlock;
 581
 582         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 583          * if any (802.11 null frames have no payload). */
 584         secondlen = skb->len - hdr_len;
 585         if (secondlen > 0) {
 586                 phys_addr =
 587                     pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen,
 588                                    PCI_DMA_TODEVICE);
 589                 if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr)))
 590                         goto drop_unlock;
 591         }
 592
 593         /* Add buffer containing Tx command and MAC(!) header to TFD's
 594          * first entry */
 595         il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
 596         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 597         dma_unmap_len_set(out_meta, len, firstlen);
 598         if (secondlen > 0)
 599                 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 0,
 600                                                U32_PAD(secondlen));
 601
 602         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 603                 txq->need_update = 1;
 604         } else {
 605                 wait_write_ptr = 1;
 606                 txq->need_update = 0;
 607         }
 608
 609         il_update_stats(il, true, fc, skb->len);
 610
 611         D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
 612         D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 613         il_print_hex_dump(il, IL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 614         il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr,
 615                           ieee80211_hdrlen(fc));
 616
 617         /* Tell device the write idx *just past* this latest filled TFD */
 618         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
 619         il_txq_update_write_ptr(il, txq);
 620         spin_unlock_irqrestore(&il->lock, flags);
 621
 622         if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
 623                 if (wait_write_ptr) {
 624                         spin_lock_irqsave(&il->lock, flags);
 625                         txq->need_update = 1;
 626                         il_txq_update_write_ptr(il, txq);
 627                         spin_unlock_irqrestore(&il->lock, flags);
 628                 }
 629
 630                 il_stop_queue(il, txq);
 631         }
 632
 633         return 0;
 634
 635 drop_unlock:
 636         spin_unlock_irqrestore(&il->lock, flags);
 637 drop:
 638         return -1;
 639 }
 640
 641 static int
 642 il3945_get_measurement(struct il_priv *il,
 643                        struct ieee80211_measurement_params *params, u8 type)
 644 {
 645         struct il_spectrum_cmd spectrum;
 646         struct il_rx_pkt *pkt;
 647         struct il_host_cmd cmd = {
 648                 .id = C_SPECTRUM_MEASUREMENT,
 649                 .data = (void *)&spectrum,
 650                 .flags = CMD_WANT_SKB,
 651         };
 652         u32 add_time = le64_to_cpu(params->start_time);
 653         int rc;
 654         int spectrum_resp_status;
 655         int duration = le16_to_cpu(params->duration);
 656
 657         if (il_is_associated(il))
 658                 add_time =
 659                     il_usecs_to_beacons(il,
 660                                         le64_to_cpu(params->start_time) -
 661                                         il->_3945.last_tsf,
 662                                         le16_to_cpu(il->timing.beacon_interval));
 663
 664         memset(&spectrum, 0, sizeof(spectrum));
 665
 666         spectrum.channel_count = cpu_to_le16(1);
 667         spectrum.flags =
 668             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 669         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 670         cmd.len = sizeof(spectrum);
 671         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 672
 673         if (il_is_associated(il))
 674                 spectrum.start_time =
 675                     il_add_beacon_time(il, il->_3945.last_beacon_time, add_time,
 676                                        le16_to_cpu(il->timing.beacon_interval));
 677         else
 678                 spectrum.start_time = 0;
 679
 680         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 681         spectrum.channels[0].channel = params->channel;
 682         spectrum.channels[0].type = type;
 683         if (il->active.flags & RXON_FLG_BAND_24G_MSK)
 684                 spectrum.flags |=
 685                     RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
 686                     RXON_FLG_TGG_PROTECT_MSK;
 687
 688         rc = il_send_cmd_sync(il, &cmd);
 689         if (rc)
 690                 return rc;
 691
 692         pkt = (struct il_rx_pkt *)cmd.reply_page;
 693         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 694                 IL_ERR("Bad return from N_RX_ON_ASSOC command\n");
 695                 rc = -EIO;
 696         }
 697
 698         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 699         switch (spectrum_resp_status) {
 700         case 0:         /* Command will be handled */
 701                 if (pkt->u.spectrum.id != 0xff) {
 702                         D_INFO("Replaced existing measurement: %d\n",
 703                                pkt->u.spectrum.id);
 704                         il->measurement_status &= ~MEASUREMENT_READY;
 705                 }
 706                 il->measurement_status |= MEASUREMENT_ACTIVE;
 707                 rc = 0;
 708                 break;
 709
 710         case 1:         /* Command will not be handled */
 711                 rc = -EAGAIN;
 712                 break;
 713         }
 714
 715         il_free_pages(il, cmd.reply_page);
 716
 717         return rc;
 718 }
 719
 720 static void
 721 il3945_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
 722 {
 723         struct il_rx_pkt *pkt = rxb_addr(rxb);
 724         struct il_alive_resp *palive;
 725         struct delayed_work *pwork;
 726
 727         palive = &pkt->u.alive_frame;
 728
 729         D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
 730                palive->is_valid, palive->ver_type, palive->ver_subtype);
 731
 732         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 733                 D_INFO("Initialization Alive received.\n");
 734                 memcpy(&il->card_alive_init, &pkt->u.alive_frame,
 735                        sizeof(struct il_alive_resp));
 736                 pwork = &il->init_alive_start;
 737         } else {
 738                 D_INFO("Runtime Alive received.\n");
 739                 memcpy(&il->card_alive, &pkt->u.alive_frame,
 740                        sizeof(struct il_alive_resp));
 741                 pwork = &il->alive_start;
 742                 il3945_disable_events(il);
 743         }
 744
 745         /* We delay the ALIVE response by 5ms to
 746          * give the HW RF Kill time to activate... */
 747         if (palive->is_valid == UCODE_VALID_OK)
 748                 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
 749         else
 750                 IL_WARN("uCode did not respond OK.\n");
 751 }
 752
 753 static void
 754 il3945_hdl_add_sta(struct il_priv *il, struct il_rx_buf *rxb)
 755 {
 756 #ifdef CONFIG_IWLEGACY_DEBUG
 757         struct il_rx_pkt *pkt = rxb_addr(rxb);
 758 #endif
 759
 760         D_RX("Received C_ADD_STA: 0x%02X\n", pkt->u.status);
 761 }
 762
 763 static void
 764 il3945_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
 765 {
 766         struct il_rx_pkt *pkt = rxb_addr(rxb);
 767         struct il3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 768 #ifdef CONFIG_IWLEGACY_DEBUG
 769         u8 rate = beacon->beacon_notify_hdr.rate;
 770
 771         D_RX("beacon status %x retries %d iss %d " "tsf %d %d rate %d\n",
 772              le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 773              beacon->beacon_notify_hdr.failure_frame,
 774              le32_to_cpu(beacon->ibss_mgr_status),
 775              le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
 776 #endif
 777
 778         il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 779
 780 }
 781
 782 /* Handle notification from uCode that card's power state is changing
 783  * due to software, hardware, or critical temperature RFKILL */
 784 static void
 785 il3945_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
 786 {
 787         struct il_rx_pkt *pkt = rxb_addr(rxb);
 788         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 789         unsigned long status = il->status;
 790
 791         IL_WARN("Card state received: HW:%s SW:%s\n",
 792                 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 793                 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 794
 795         _il_wr(il, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 796
 797         if (flags & HW_CARD_DISABLED)
 798                 set_bit(S_RFKILL, &il->status);
 799         else
 800                 clear_bit(S_RFKILL, &il->status);
 801
 802         il_scan_cancel(il);
 803
 804         if ((test_bit(S_RFKILL, &status) !=
 805              test_bit(S_RFKILL, &il->status)))
 806                 wiphy_rfkill_set_hw_state(il->hw->wiphy,
 807                                           test_bit(S_RFKILL, &il->status));
 808         else
 809                 wake_up(&il->wait_command_queue);
 810 }
 811
 812 /**
 813  * il3945_setup_handlers - Initialize Rx handler callbacks
 814  *
 815  * Setup the RX handlers for each of the reply types sent from the uCode
 816  * to the host.
 817  *
 818  * This function chains into the hardware specific files for them to setup
 819  * any hardware specific handlers as well.
 820  */
 821 static void
 822 il3945_setup_handlers(struct il_priv *il)
 823 {
 824         il->handlers[N_ALIVE] = il3945_hdl_alive;
 825         il->handlers[C_ADD_STA] = il3945_hdl_add_sta;
 826         il->handlers[N_ERROR] = il_hdl_error;
 827         il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
 828         il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
 829         il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
 830         il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
 831         il->handlers[N_BEACON] = il3945_hdl_beacon;
 832
 833         /*
 834          * The same handler is used for both the REPLY to a discrete
 835          * stats request from the host as well as for the periodic
 836          * stats notifications (after received beacons) from the uCode.
 837          */
 838         il->handlers[C_STATS] = il3945_hdl_c_stats;
 839         il->handlers[N_STATS] = il3945_hdl_stats;
 840
 841         il_setup_rx_scan_handlers(il);
 842         il->handlers[N_CARD_STATE] = il3945_hdl_card_state;
 843
 844         /* Set up hardware specific Rx handlers */
 845         il3945_hw_handler_setup(il);
 846 }
 847
 848 /************************** RX-FUNCTIONS ****************************/
 849 /*
 850  * Rx theory of operation
 851  *
 852  * The host allocates 32 DMA target addresses and passes the host address
 853  * to the firmware at register IL_RFDS_TBL_LOWER + N * RFD_SIZE where N is
 854  * 0 to 31
 855  *
 856  * Rx Queue Indexes
 857  * The host/firmware share two idx registers for managing the Rx buffers.
 858  *
 859  * The READ idx maps to the first position that the firmware may be writing
 860  * to -- the driver can read up to (but not including) this position and get
 861  * good data.
 862  * The READ idx is managed by the firmware once the card is enabled.
 863  *
 864  * The WRITE idx maps to the last position the driver has read from -- the
 865  * position preceding WRITE is the last slot the firmware can place a packet.
 866  *
 867  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 868  * WRITE = READ.
 869  *
 870  * During initialization, the host sets up the READ queue position to the first
 871  * IDX position, and WRITE to the last (READ - 1 wrapped)
 872  *
 873  * When the firmware places a packet in a buffer, it will advance the READ idx
 874  * and fire the RX interrupt.  The driver can then query the READ idx and
 875  * process as many packets as possible, moving the WRITE idx forward as it
 876  * resets the Rx queue buffers with new memory.
 877  *
 878  * The management in the driver is as follows:
 879  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 880  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 881  *   to replenish the iwl->rxq->rx_free.
 882  * + In il3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 883  *   iwl->rxq is replenished and the READ IDX is updated (updating the
 884  *   'processed' and 'read' driver idxes as well)
 885  * + A received packet is processed and handed to the kernel network stack,
 886  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
 887  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 888  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 889  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
 890  *   were enough free buffers and RX_STALLED is set it is cleared.
 891  *
 892  *
 893  * Driver sequence:
 894  *
 895  * il3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 896  *                            il3945_rx_queue_restock
 897  * il3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 898  *                            queue, updates firmware pointers, and updates
 899  *                            the WRITE idx.  If insufficient rx_free buffers
 900  *                            are available, schedules il3945_rx_replenish
 901  *
 902  * -- enable interrupts --
 903  * ISR - il3945_rx()         Detach il_rx_bufs from pool up to the
 904  *                            READ IDX, detaching the SKB from the pool.
 905  *                            Moves the packet buffer from queue to rx_used.
 906  *                            Calls il3945_rx_queue_restock to refill any empty
 907  *                            slots.
 908  * ...
 909  *
 910  */
 911
 912 /**
 913  * il3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 914  */
 915 static inline __le32
 916 il3945_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
 917 {
 918         return cpu_to_le32((u32) dma_addr);
 919 }
 920
 921 /**
 922  * il3945_rx_queue_restock - refill RX queue from pre-allocated pool
 923  *
 924  * If there are slots in the RX queue that need to be restocked,
 925  * and we have free pre-allocated buffers, fill the ranks as much
 926  * as we can, pulling from rx_free.
 927  *
 928  * This moves the 'write' idx forward to catch up with 'processed', and
 929  * also updates the memory address in the firmware to reference the new
 930  * target buffer.
 931  */
 932 static void
 933 il3945_rx_queue_restock(struct il_priv *il)
 934 {
 935         struct il_rx_queue *rxq = &il->rxq;
 936         struct list_head *element;
 937         struct il_rx_buf *rxb;
 938         unsigned long flags;
 939
 940         spin_lock_irqsave(&rxq->lock, flags);
 941         while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
 942                 /* Get next free Rx buffer, remove from free list */
 943                 element = rxq->rx_free.next;
 944                 rxb = list_entry(element, struct il_rx_buf, list);
 945                 list_del(element);
 946
 947                 /* Point to Rx buffer via next RBD in circular buffer */
 948                 rxq->bd[rxq->write] =
 949                     il3945_dma_addr2rbd_ptr(il, rxb->page_dma);
 950                 rxq->queue[rxq->write] = rxb;
 951                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
 952                 rxq->free_count--;
 953         }
 954         spin_unlock_irqrestore(&rxq->lock, flags);
 955         /* If the pre-allocated buffer pool is dropping low, schedule to
 956          * refill it */
 957         if (rxq->free_count <= RX_LOW_WATERMARK)
 958                 queue_work(il->workqueue, &il->rx_replenish);
 959
 960         /* If we've added more space for the firmware to place data, tell it.
 961          * Increment device's write pointer in multiples of 8. */
 962         if (rxq->write_actual != (rxq->write & ~0x7) ||
 963             abs(rxq->write - rxq->read) > 7) {
 964                 spin_lock_irqsave(&rxq->lock, flags);
 965                 rxq->need_update = 1;
 966                 spin_unlock_irqrestore(&rxq->lock, flags);
 967                 il_rx_queue_update_write_ptr(il, rxq);
 968         }
 969 }
 970
 971 /**
 972  * il3945_rx_replenish - Move all used packet from rx_used to rx_free
 973  *
 974  * When moving to rx_free an SKB is allocated for the slot.
 975  *
 976  * Also restock the Rx queue via il3945_rx_queue_restock.
 977  * This is called as a scheduled work item (except for during initialization)
 978  */
 979 static void
 980 il3945_rx_allocate(struct il_priv *il, gfp_t priority)
 981 {
 982         struct il_rx_queue *rxq = &il->rxq;
 983         struct list_head *element;
 984         struct il_rx_buf *rxb;
 985         struct page *page;
 986         dma_addr_t page_dma;
 987         unsigned long flags;
 988         gfp_t gfp_mask = priority;
 989
 990         while (1) {
 991                 spin_lock_irqsave(&rxq->lock, flags);
 992                 if (list_empty(&rxq->rx_used)) {
 993                         spin_unlock_irqrestore(&rxq->lock, flags);
 994                         return;
 995                 }
 996                 spin_unlock_irqrestore(&rxq->lock, flags);
 997
 998                 if (rxq->free_count > RX_LOW_WATERMARK)
 999                         gfp_mask |= __GFP_NOWARN;
1000
1001                 if (il->hw_params.rx_page_order > 0)
1002                         gfp_mask |= __GFP_COMP;
1003
1004                 /* Alloc a new receive buffer */
1005                 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
1006                 if (!page) {
1007                         if (net_ratelimit())
1008                                 D_INFO("Failed to allocate SKB buffer.\n");
1009                         if (rxq->free_count <= RX_LOW_WATERMARK &&
1010                             net_ratelimit())
1011                                 IL_ERR("Failed to allocate SKB buffer with %0x."
1012                                        "Only %u free buffers remaining.\n",
1013                                        priority, rxq->free_count);
1014                         /* We don't reschedule replenish work here -- we will
1015                          * call the restock method and if it still needs
1016                          * more buffers it will schedule replenish */
1017                         break;
1018                 }
1019
1020                 /* Get physical address of RB/SKB */
1021                 page_dma =
1022                     pci_map_page(il->pci_dev, page, 0,
1023                                  PAGE_SIZE << il->hw_params.rx_page_order,
1024                                  PCI_DMA_FROMDEVICE);
1025
1026                 if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) {
1027                         __free_pages(page, il->hw_params.rx_page_order);
1028                         break;
1029                 }
1030
1031                 spin_lock_irqsave(&rxq->lock, flags);
1032
1033                 if (list_empty(&rxq->rx_used)) {
1034                         spin_unlock_irqrestore(&rxq->lock, flags);
1035                         pci_unmap_page(il->pci_dev, page_dma,
1036                                        PAGE_SIZE << il->hw_params.rx_page_order,
1037                                        PCI_DMA_FROMDEVICE);
1038                         __free_pages(page, il->hw_params.rx_page_order);
1039                         return;
1040                 }
1041
1042                 element = rxq->rx_used.next;
1043                 rxb = list_entry(element, struct il_rx_buf, list);
1044                 list_del(element);
1045
1046                 rxb->page = page;
1047                 rxb->page_dma = page_dma;
1048                 list_add_tail(&rxb->list, &rxq->rx_free);
1049                 rxq->free_count++;
1050                 il->alloc_rxb_page++;
1051
1052                 spin_unlock_irqrestore(&rxq->lock, flags);
1053         }
1054 }
1055
1056 void
1057 il3945_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
1058 {
1059         unsigned long flags;
1060         int i;
1061         spin_lock_irqsave(&rxq->lock, flags);
1062         INIT_LIST_HEAD(&rxq->rx_free);
1063         INIT_LIST_HEAD(&rxq->rx_used);
1064         /* Fill the rx_used queue with _all_ of the Rx buffers */
1065         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1066                 /* In the reset function, these buffers may have been allocated
1067                  * to an SKB, so we need to unmap and free potential storage */
1068                 if (rxq->pool[i].page != NULL) {
1069                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1070                                        PAGE_SIZE << il->hw_params.rx_page_order,
1071                                        PCI_DMA_FROMDEVICE);
1072                         __il_free_pages(il, rxq->pool[i].page);
1073                         rxq->pool[i].page = NULL;
1074                 }
1075                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1076         }
1077
1078         /* Set us so that we have processed and used all buffers, but have
1079          * not restocked the Rx queue with fresh buffers */
1080         rxq->read = rxq->write = 0;
1081         rxq->write_actual = 0;
1082         rxq->free_count = 0;
1083         spin_unlock_irqrestore(&rxq->lock, flags);
1084 }
1085
1086 void
1087 il3945_rx_replenish(void *data)
1088 {
1089         struct il_priv *il = data;
1090         unsigned long flags;
1091
1092         il3945_rx_allocate(il, GFP_KERNEL);
1093
1094         spin_lock_irqsave(&il->lock, flags);
1095         il3945_rx_queue_restock(il);
1096         spin_unlock_irqrestore(&il->lock, flags);
1097 }
1098
1099 static void
1100 il3945_rx_replenish_now(struct il_priv *il)
1101 {
1102         il3945_rx_allocate(il, GFP_ATOMIC);
1103
1104         il3945_rx_queue_restock(il);
1105 }
1106
1107 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1108  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1109  * This free routine walks the list of POOL entries and if SKB is set to
1110  * non NULL it is unmapped and freed
1111  */
1112 static void
1113 il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
1114 {
1115         int i;
1116         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1117                 if (rxq->pool[i].page != NULL) {
1118                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1119                                        PAGE_SIZE << il->hw_params.rx_page_order,
1120                                        PCI_DMA_FROMDEVICE);
1121                         __il_free_pages(il, rxq->pool[i].page);
1122                         rxq->pool[i].page = NULL;
1123                 }
1124         }
1125
1126         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1127                           rxq->bd_dma);
1128         dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
1129                           rxq->rb_stts, rxq->rb_stts_dma);
1130         rxq->bd = NULL;
1131         rxq->rb_stts = NULL;
1132 }
1133
1134 /* Convert linear signal-to-noise ratio into dB */
1135 static u8 ratio2dB[100] = {
1136 /*       0   1   2   3   4   5   6   7   8   9 */
1137         0, 0, 6, 10, 12, 14, 16, 17, 18, 19,    /* 00 - 09 */
1138         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1139         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1140         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1141         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1142         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1143         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1144         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1145         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1146         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1147 };
1148
1149 /* Calculates a relative dB value from a ratio of linear
1150  *   (i.e. not dB) signal levels.
1151  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1152 int
1153 il3945_calc_db_from_ratio(int sig_ratio)
1154 {
1155         /* 1000:1 or higher just report as 60 dB */
1156         if (sig_ratio >= 1000)
1157                 return 60;
1158
1159         /* 100:1 or higher, divide by 10 and use table,
1160          *   add 20 dB to make up for divide by 10 */
1161         if (sig_ratio >= 100)
1162                 return 20 + (int)ratio2dB[sig_ratio / 10];
1163
1164         /* We shouldn't see this */
1165         if (sig_ratio < 1)
1166                 return 0;
1167
1168         /* Use table for ratios 1:1 - 99:1 */
1169         return (int)ratio2dB[sig_ratio];
1170 }
1171
1172 /**
1173  * il3945_rx_handle - Main entry function for receiving responses from uCode
1174  *
1175  * Uses the il->handlers callback function array to invoke
1176  * the appropriate handlers, including command responses,
1177  * frame-received notifications, and other notifications.
1178  */
1179 static void
1180 il3945_rx_handle(struct il_priv *il)
1181 {
1182         struct il_rx_buf *rxb;
1183         struct il_rx_pkt *pkt;
1184         struct il_rx_queue *rxq = &il->rxq;
1185         u32 r, i;
1186         int reclaim;
1187         unsigned long flags;
1188         u8 fill_rx = 0;
1189         u32 count = 8;
1190         int total_empty = 0;
1191
1192         /* uCode's read idx (stored in shared DRAM) indicates the last Rx
1193          * buffer that the driver may process (last buffer filled by ucode). */
1194         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1195         i = rxq->read;
1196
1197         /* calculate total frames need to be restock after handling RX */
1198         total_empty = r - rxq->write_actual;
1199         if (total_empty < 0)
1200                 total_empty += RX_QUEUE_SIZE;
1201
1202         if (total_empty > (RX_QUEUE_SIZE / 2))
1203                 fill_rx = 1;
1204         /* Rx interrupt, but nothing sent from uCode */
1205         if (i == r)
1206                 D_RX("r = %d, i = %d\n", r, i);
1207
1208         while (i != r) {
1209                 int len;
1210
1211                 rxb = rxq->queue[i];
1212
1213                 /* If an RXB doesn't have a Rx queue slot associated with it,
1214                  * then a bug has been introduced in the queue refilling
1215                  * routines -- catch it here */
1216                 BUG_ON(rxb == NULL);
1217
1218                 rxq->queue[i] = NULL;
1219
1220                 pci_unmap_page(il->pci_dev, rxb->page_dma,
1221                                PAGE_SIZE << il->hw_params.rx_page_order,
1222                                PCI_DMA_FROMDEVICE);
1223                 pkt = rxb_addr(rxb);
1224
1225                 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
1226                 len += sizeof(u32);     /* account for status word */
1227
1228                 reclaim = il_need_reclaim(il, pkt);
1229
1230                 /* Based on type of command response or notification,
1231                  *   handle those that need handling via function in
1232                  *   handlers table.  See il3945_setup_handlers() */
1233                 if (il->handlers[pkt->hdr.cmd]) {
1234                         D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
1235                              il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1236                         il->isr_stats.handlers[pkt->hdr.cmd]++;
1237                         il->handlers[pkt->hdr.cmd] (il, rxb);
1238                 } else {
1239                         /* No handling needed */
1240                         D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
1241                              i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1242                 }
1243
1244                 /*
1245                  * XXX: After here, we should always check rxb->page
1246                  * against NULL before touching it or its virtual
1247                  * memory (pkt). Because some handler might have
1248                  * already taken or freed the pages.
1249                  */
1250
1251                 if (reclaim) {
1252                         /* Invoke any callbacks, transfer the buffer to caller,
1253                          * and fire off the (possibly) blocking il_send_cmd()
1254                          * as we reclaim the driver command queue */
1255                         if (rxb->page)
1256                                 il_tx_cmd_complete(il, rxb);
1257                         else
1258                                 IL_WARN("Claim null rxb?\n");
1259                 }
1260
1261                 /* Reuse the page if possible. For notification packets and
1262                  * SKBs that fail to Rx correctly, add them back into the
1263                  * rx_free list for reuse later. */
1264                 spin_lock_irqsave(&rxq->lock, flags);
1265                 if (rxb->page != NULL) {
1266                         rxb->page_dma =
1267                             pci_map_page(il->pci_dev, rxb->page, 0,
1268                                          PAGE_SIZE << il->hw_params.
1269                                          rx_page_order, PCI_DMA_FROMDEVICE);
1270                         if (unlikely(pci_dma_mapping_error(il->pci_dev,
1271                                                            rxb->page_dma))) {
1272                                 __il_free_pages(il, rxb->page);
1273                                 rxb->page = NULL;
1274                                 list_add_tail(&rxb->list, &rxq->rx_used);
1275                         } else {
1276                                 list_add_tail(&rxb->list, &rxq->rx_free);
1277                                 rxq->free_count++;
1278                         }
1279                 } else
1280                         list_add_tail(&rxb->list, &rxq->rx_used);
1281
1282                 spin_unlock_irqrestore(&rxq->lock, flags);
1283
1284                 i = (i + 1) & RX_QUEUE_MASK;
1285                 /* If there are a lot of unused frames,
1286                  * restock the Rx queue so ucode won't assert. */
1287                 if (fill_rx) {
1288                         count++;
1289                         if (count >= 8) {
1290                                 rxq->read = i;
1291                                 il3945_rx_replenish_now(il);
1292                                 count = 0;
1293                         }
1294                 }
1295         }
1296
1297         /* Backtrack one entry */
1298         rxq->read = i;
1299         if (fill_rx)
1300                 il3945_rx_replenish_now(il);
1301         else
1302                 il3945_rx_queue_restock(il);
1303 }
1304
1305 /* call this function to flush any scheduled tasklet */
1306 static inline void
1307 il3945_synchronize_irq(struct il_priv *il)
1308 {
1309         /* wait to make sure we flush pending tasklet */
1310         synchronize_irq(il->pci_dev->irq);
1311         tasklet_kill(&il->irq_tasklet);
1312 }
1313
1314 static const char *
1315 il3945_desc_lookup(int i)
1316 {
1317         switch (i) {
1318         case 1:
1319                 return "FAIL";
1320         case 2:
1321                 return "BAD_PARAM";
1322         case 3:
1323                 return "BAD_CHECKSUM";
1324         case 4:
1325                 return "NMI_INTERRUPT";
1326         case 5:
1327                 return "SYSASSERT";
1328         case 6:
1329                 return "FATAL_ERROR";
1330         }
1331
1332         return "UNKNOWN";
1333 }
1334
1335 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1336 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1337
1338 void
1339 il3945_dump_nic_error_log(struct il_priv *il)
1340 {
1341         u32 i;
1342         u32 desc, time, count, base, data1;
1343         u32 blink1, blink2, ilink1, ilink2;
1344
1345         base = le32_to_cpu(il->card_alive.error_event_table_ptr);
1346
1347         if (!il3945_hw_valid_rtc_data_addr(base)) {
1348                 IL_ERR("Not valid error log pointer 0x%08X\n", base);
1349                 return;
1350         }
1351
1352         count = il_read_targ_mem(il, base);
1353
1354         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1355                 IL_ERR("Start IWL Error Log Dump:\n");
1356                 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
1357         }
1358
1359         IL_ERR("Desc       Time       asrtPC  blink2 "
1360                "ilink1  nmiPC   Line\n");
1361         for (i = ERROR_START_OFFSET;
1362              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1363              i += ERROR_ELEM_SIZE) {
1364                 desc = il_read_targ_mem(il, base + i);
1365                 time = il_read_targ_mem(il, base + i + 1 * sizeof(u32));
1366                 blink1 = il_read_targ_mem(il, base + i + 2 * sizeof(u32));
1367                 blink2 = il_read_targ_mem(il, base + i + 3 * sizeof(u32));
1368                 ilink1 = il_read_targ_mem(il, base + i + 4 * sizeof(u32));
1369                 ilink2 = il_read_targ_mem(il, base + i + 5 * sizeof(u32));
1370                 data1 = il_read_targ_mem(il, base + i + 6 * sizeof(u32));
1371
1372                 IL_ERR("%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1373                        il3945_desc_lookup(desc), desc, time, blink1, blink2,
1374                        ilink1, ilink2, data1);
1375         }
1376 }
1377
1378 static void
1379 il3945_irq_tasklet(struct il_priv *il)
1380 {
1381         u32 inta, handled = 0;
1382         u32 inta_fh;
1383         unsigned long flags;
1384 #ifdef CONFIG_IWLEGACY_DEBUG
1385         u32 inta_mask;
1386 #endif
1387
1388         spin_lock_irqsave(&il->lock, flags);
1389
1390         /* Ack/clear/reset pending uCode interrupts.
1391          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1392          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1393         inta = _il_rd(il, CSR_INT);
1394         _il_wr(il, CSR_INT, inta);
1395
1396         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1397          * Any new interrupts that happen after this, either while we're
1398          * in this tasklet, or later, will show up in next ISR/tasklet. */
1399         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1400         _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
1401
1402 #ifdef CONFIG_IWLEGACY_DEBUG
1403         if (il_get_debug_level(il) & IL_DL_ISR) {
1404                 /* just for debug */
1405                 inta_mask = _il_rd(il, CSR_INT_MASK);
1406                 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
1407                       inta_mask, inta_fh);
1408         }
1409 #endif
1410
1411         spin_unlock_irqrestore(&il->lock, flags);
1412
1413         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1414          * atomic, make sure that inta covers all the interrupts that
1415          * we've discovered, even if FH interrupt came in just after
1416          * reading CSR_INT. */
1417         if (inta_fh & CSR39_FH_INT_RX_MASK)
1418                 inta |= CSR_INT_BIT_FH_RX;
1419         if (inta_fh & CSR39_FH_INT_TX_MASK)
1420                 inta |= CSR_INT_BIT_FH_TX;
1421
1422         /* Now service all interrupt bits discovered above. */
1423         if (inta & CSR_INT_BIT_HW_ERR) {
1424                 IL_ERR("Hardware error detected.  Restarting.\n");
1425
1426                 /* Tell the device to stop sending interrupts */
1427                 il_disable_interrupts(il);
1428
1429                 il->isr_stats.hw++;
1430                 il_irq_handle_error(il);
1431
1432                 handled |= CSR_INT_BIT_HW_ERR;
1433
1434                 return;
1435         }
1436 #ifdef CONFIG_IWLEGACY_DEBUG
1437         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1438                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1439                 if (inta & CSR_INT_BIT_SCD) {
1440                         D_ISR("Scheduler finished to transmit "
1441                               "the frame/frames.\n");
1442                         il->isr_stats.sch++;
1443                 }
1444
1445                 /* Alive notification via Rx interrupt will do the real work */
1446                 if (inta & CSR_INT_BIT_ALIVE) {
1447                         D_ISR("Alive interrupt\n");
1448                         il->isr_stats.alive++;
1449                 }
1450         }
1451 #endif
1452         /* Safely ignore these bits for debug checks below */
1453         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1454
1455         /* Error detected by uCode */
1456         if (inta & CSR_INT_BIT_SW_ERR) {
1457                 IL_ERR("Microcode SW error detected. " "Restarting 0x%X.\n",
1458                        inta);
1459                 il->isr_stats.sw++;
1460                 il_irq_handle_error(il);
1461                 handled |= CSR_INT_BIT_SW_ERR;
1462         }
1463
1464         /* uCode wakes up after power-down sleep */
1465         if (inta & CSR_INT_BIT_WAKEUP) {
1466                 D_ISR("Wakeup interrupt\n");
1467                 il_rx_queue_update_write_ptr(il, &il->rxq);
1468
1469                 spin_lock_irqsave(&il->lock, flags);
1470                 il_txq_update_write_ptr(il, &il->txq[0]);
1471                 il_txq_update_write_ptr(il, &il->txq[1]);
1472                 il_txq_update_write_ptr(il, &il->txq[2]);
1473                 il_txq_update_write_ptr(il, &il->txq[3]);
1474                 il_txq_update_write_ptr(il, &il->txq[4]);
1475                 spin_unlock_irqrestore(&il->lock, flags);
1476
1477                 il->isr_stats.wakeup++;
1478                 handled |= CSR_INT_BIT_WAKEUP;
1479         }
1480
1481         /* All uCode command responses, including Tx command responses,
1482          * Rx "responses" (frame-received notification), and other
1483          * notifications from uCode come through here*/
1484         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1485                 il3945_rx_handle(il);
1486                 il->isr_stats.rx++;
1487                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1488         }
1489
1490         if (inta & CSR_INT_BIT_FH_TX) {
1491                 D_ISR("Tx interrupt\n");
1492                 il->isr_stats.tx++;
1493
1494                 _il_wr(il, CSR_FH_INT_STATUS, (1 << 6));
1495                 il_wr(il, FH39_TCSR_CREDIT(FH39_SRVC_CHNL), 0x0);
1496                 handled |= CSR_INT_BIT_FH_TX;
1497         }
1498
1499         if (inta & ~handled) {
1500                 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1501                 il->isr_stats.unhandled++;
1502         }
1503
1504         if (inta & ~il->inta_mask) {
1505                 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
1506                         inta & ~il->inta_mask);
1507                 IL_WARN("   with inta_fh = 0x%08x\n", inta_fh);
1508         }
1509
1510         /* Re-enable all interrupts */
1511         /* only Re-enable if disabled by irq */
1512         if (test_bit(S_INT_ENABLED, &il->status))
1513                 il_enable_interrupts(il);
1514
1515 #ifdef CONFIG_IWLEGACY_DEBUG
1516         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1517                 inta = _il_rd(il, CSR_INT);
1518                 inta_mask = _il_rd(il, CSR_INT_MASK);
1519                 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1520                 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1521                       "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1522         }
1523 #endif
1524 }
1525
1526 static int
1527 il3945_get_channels_for_scan(struct il_priv *il, enum nl80211_band band,
1528                              u8 is_active, u8 n_probes,
1529                              struct il3945_scan_channel *scan_ch,
1530                              struct ieee80211_vif *vif)
1531 {
1532         struct ieee80211_channel *chan;
1533         const struct ieee80211_supported_band *sband;
1534         const struct il_channel_info *ch_info;
1535         u16 passive_dwell = 0;
1536         u16 active_dwell = 0;
1537         int added, i;
1538
1539         sband = il_get_hw_mode(il, band);
1540         if (!sband)
1541                 return 0;
1542
1543         active_dwell = il_get_active_dwell_time(il, band, n_probes);
1544         passive_dwell = il_get_passive_dwell_time(il, band, vif);
1545
1546         if (passive_dwell <= active_dwell)
1547                 passive_dwell = active_dwell + 1;
1548
1549         for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
1550                 chan = il->scan_request->channels[i];
1551
1552                 if (chan->band != band)
1553                         continue;
1554
1555                 scan_ch->channel = chan->hw_value;
1556
1557                 ch_info = il_get_channel_info(il, band, scan_ch->channel);
1558                 if (!il_is_channel_valid(ch_info)) {
1559                         D_SCAN("Channel %d is INVALID for this band.\n",
1560                                scan_ch->channel);
1561                         continue;
1562                 }
1563
1564                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1565                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1566                 /* If passive , set up for auto-switch
1567                  *  and use long active_dwell time.
1568                  */
1569                 if (!is_active || il_is_channel_passive(ch_info) ||
1570                     (chan->flags & IEEE80211_CHAN_NO_IR)) {
1571                         scan_ch->type = 0;      /* passive */
1572                         if (IL_UCODE_API(il->ucode_ver) == 1)
1573                                 scan_ch->active_dwell =
1574                                     cpu_to_le16(passive_dwell - 1);
1575                 } else {
1576                         scan_ch->type = 1;      /* active */
1577                 }
1578
1579                 /* Set direct probe bits. These may be used both for active
1580                  * scan channels (probes gets sent right away),
1581                  * or for passive channels (probes get se sent only after
1582                  * hearing clear Rx packet).*/
1583                 if (IL_UCODE_API(il->ucode_ver) >= 2) {
1584                         if (n_probes)
1585                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1586                 } else {
1587                         /* uCode v1 does not allow setting direct probe bits on
1588                          * passive channel. */
1589                         if ((scan_ch->type & 1) && n_probes)
1590                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1591                 }
1592
1593                 /* Set txpower levels to defaults */
1594                 scan_ch->tpc.dsp_atten = 110;
1595                 /* scan_pwr_info->tpc.dsp_atten; */
1596
1597                 /*scan_pwr_info->tpc.tx_gain; */
1598                 if (band == NL80211_BAND_5GHZ)
1599                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1600                 else {
1601                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1602                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1603                          * power level:
1604                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1605                          */
1606                 }
1607
1608                 D_SCAN("Scanning %d [%s %d]\n", scan_ch->channel,
1609                        (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1610                        (scan_ch->type & 1) ? active_dwell : passive_dwell);
1611
1612                 scan_ch++;
1613                 added++;
1614         }
1615
1616         D_SCAN("total channels to scan %d\n", added);
1617         return added;
1618 }
1619
1620 static void
1621 il3945_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
1622 {
1623         int i;
1624
1625         for (i = 0; i < RATE_COUNT_LEGACY; i++) {
1626                 rates[i].bitrate = il3945_rates[i].ieee * 5;
1627                 rates[i].hw_value = i;  /* Rate scaling will work on idxes */
1628                 rates[i].hw_value_short = i;
1629                 rates[i].flags = 0;
1630                 if (i > IL39_LAST_OFDM_RATE || i < IL_FIRST_OFDM_RATE) {
1631                         /*
1632                          * If CCK != 1M then set short preamble rate flag.
1633                          */
1634                         rates[i].flags |=
1635                             (il3945_rates[i].plcp ==
1636                              10) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1637                 }
1638         }
1639 }
1640
1641 /******************************************************************************
1642  *
1643  * uCode download functions
1644  *
1645  ******************************************************************************/
1646
1647 static void
1648 il3945_dealloc_ucode_pci(struct il_priv *il)
1649 {
1650         il_free_fw_desc(il->pci_dev, &il->ucode_code);
1651         il_free_fw_desc(il->pci_dev, &il->ucode_data);
1652         il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
1653         il_free_fw_desc(il->pci_dev, &il->ucode_init);
1654         il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
1655         il_free_fw_desc(il->pci_dev, &il->ucode_boot);
1656 }
1657
1658 /**
1659  * il3945_verify_inst_full - verify runtime uCode image in card vs. host,
1660  *     looking at all data.
1661  */
1662 static int
1663 il3945_verify_inst_full(struct il_priv *il, __le32 * image, u32 len)
1664 {
1665         u32 val;
1666         u32 save_len = len;
1667         int rc = 0;
1668         u32 errcnt;
1669
1670         D_INFO("ucode inst image size is %u\n", len);
1671
1672         il_wr(il, HBUS_TARG_MEM_RADDR, IL39_RTC_INST_LOWER_BOUND);
1673
1674         errcnt = 0;
1675         for (; len > 0; len -= sizeof(u32), image++) {
1676                 /* read data comes through single port, auto-incr addr */
1677                 /* NOTE: Use the debugless read so we don't flood kernel log
1678                  * if IL_DL_IO is set */
1679                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1680                 if (val != le32_to_cpu(*image)) {
1681                         IL_ERR("uCode INST section is invalid at "
1682                                "offset 0x%x, is 0x%x, s/b 0x%x\n",
1683                                save_len - len, val, le32_to_cpu(*image));
1684                         rc = -EIO;
1685                         errcnt++;
1686                         if (errcnt >= 20)
1687                                 break;
1688                 }
1689         }
1690
1691         if (!errcnt)
1692                 D_INFO("ucode image in INSTRUCTION memory is good\n");
1693
1694         return rc;
1695 }
1696
1697 /**
1698  * il3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1699  *   using sample data 100 bytes apart.  If these sample points are good,
1700  *   it's a pretty good bet that everything between them is good, too.
1701  */
1702 static int
1703 il3945_verify_inst_sparse(struct il_priv *il, __le32 * image, u32 len)
1704 {
1705         u32 val;
1706         int rc = 0;
1707         u32 errcnt = 0;
1708         u32 i;
1709
1710         D_INFO("ucode inst image size is %u\n", len);
1711
1712         for (i = 0; i < len; i += 100, image += 100 / sizeof(u32)) {
1713                 /* read data comes through single port, auto-incr addr */
1714                 /* NOTE: Use the debugless read so we don't flood kernel log
1715                  * if IL_DL_IO is set */
1716                 il_wr(il, HBUS_TARG_MEM_RADDR, i + IL39_RTC_INST_LOWER_BOUND);
1717                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1718                 if (val != le32_to_cpu(*image)) {
1719 #if 0                           /* Enable this if you want to see details */
1720                         IL_ERR("uCode INST section is invalid at "
1721                                "offset 0x%x, is 0x%x, s/b 0x%x\n", i, val,
1722                                *image);
1723 #endif
1724                         rc = -EIO;
1725                         errcnt++;
1726                         if (errcnt >= 3)
1727                                 break;
1728                 }
1729         }
1730
1731         return rc;
1732 }
1733
1734 /**
1735  * il3945_verify_ucode - determine which instruction image is in SRAM,
1736  *    and verify its contents
1737  */
1738 static int
1739 il3945_verify_ucode(struct il_priv *il)
1740 {
1741         __le32 *image;
1742         u32 len;
1743         int rc = 0;
1744
1745         /* Try bootstrap */
1746         image = (__le32 *) il->ucode_boot.v_addr;
1747         len = il->ucode_boot.len;
1748         rc = il3945_verify_inst_sparse(il, image, len);
1749         if (rc == 0) {
1750                 D_INFO("Bootstrap uCode is good in inst SRAM\n");
1751                 return 0;
1752         }
1753
1754         /* Try initialize */
1755         image = (__le32 *) il->ucode_init.v_addr;
1756         len = il->ucode_init.len;
1757         rc = il3945_verify_inst_sparse(il, image, len);
1758         if (rc == 0) {
1759                 D_INFO("Initialize uCode is good in inst SRAM\n");
1760                 return 0;
1761         }
1762
1763         /* Try runtime/protocol */
1764         image = (__le32 *) il->ucode_code.v_addr;
1765         len = il->ucode_code.len;
1766         rc = il3945_verify_inst_sparse(il, image, len);
1767         if (rc == 0) {
1768                 D_INFO("Runtime uCode is good in inst SRAM\n");
1769                 return 0;
1770         }
1771
1772         IL_ERR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1773
1774         /* Since nothing seems to match, show first several data entries in
1775          * instruction SRAM, so maybe visual inspection will give a clue.
1776          * Selection of bootstrap image (vs. other images) is arbitrary. */
1777         image = (__le32 *) il->ucode_boot.v_addr;
1778         len = il->ucode_boot.len;
1779         rc = il3945_verify_inst_full(il, image, len);
1780
1781         return rc;
1782 }
1783
1784 static void
1785 il3945_nic_start(struct il_priv *il)
1786 {
1787         /* Remove all resets to allow NIC to operate */
1788         _il_wr(il, CSR_RESET, 0);
1789 }
1790
1791 #define IL3945_UCODE_GET(item)                                          \
1792 static u32 il3945_ucode_get_##item(const struct il_ucode_header *ucode)\
1793 {                                                                       \
1794         return le32_to_cpu(ucode->v1.item);                             \
1795 }
1796
1797 static u32
1798 il3945_ucode_get_header_size(u32 api_ver)
1799 {
1800         return 24;
1801 }
1802
1803 static u8 *
1804 il3945_ucode_get_data(const struct il_ucode_header *ucode)
1805 {
1806         return (u8 *) ucode->v1.data;
1807 }
1808
1809 IL3945_UCODE_GET(inst_size);
1810 IL3945_UCODE_GET(data_size);
1811 IL3945_UCODE_GET(init_size);
1812 IL3945_UCODE_GET(init_data_size);
1813 IL3945_UCODE_GET(boot_size);
1814
1815 /**
1816  * il3945_read_ucode - Read uCode images from disk file.
1817  *
1818  * Copy into buffers for card to fetch via bus-mastering
1819  */
1820 static int
1821 il3945_read_ucode(struct il_priv *il)
1822 {
1823         const struct il_ucode_header *ucode;
1824         int ret = -EINVAL, idx;
1825         const struct firmware *ucode_raw;
1826         /* firmware file name contains uCode/driver compatibility version */
1827         const char *name_pre = il->cfg->fw_name_pre;
1828         const unsigned int api_max = il->cfg->ucode_api_max;
1829         const unsigned int api_min = il->cfg->ucode_api_min;
1830         char buf[25];
1831         u8 *src;
1832         size_t len;
1833         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1834
1835         /* Ask kernel firmware_class module to get the boot firmware off disk.
1836          * request_firmware() is synchronous, file is in memory on return. */
1837         for (idx = api_max; idx >= api_min; idx--) {
1838                 sprintf(buf, "%s%u%s", name_pre, idx, ".ucode");
1839                 ret = request_firmware(&ucode_raw, buf, &il->pci_dev->dev);
1840                 if (ret < 0) {
1841                         IL_ERR("%s firmware file req failed: %d\n", buf, ret);
1842                         if (ret == -ENOENT)
1843                                 continue;
1844                         else
1845                                 goto error;
1846                 } else {
1847                         if (idx < api_max)
1848                                 IL_ERR("Loaded firmware %s, "
1849                                        "which is deprecated. "
1850                                        " Please use API v%u instead.\n", buf,
1851                                        api_max);
1852                         D_INFO("Got firmware '%s' file "
1853                                "(%zd bytes) from disk\n", buf, ucode_raw->size);
1854                         break;
1855                 }
1856         }
1857
1858         if (ret < 0)
1859                 goto error;
1860
1861         /* Make sure that we got at least our header! */
1862         if (ucode_raw->size < il3945_ucode_get_header_size(1)) {
1863                 IL_ERR("File size way too small!\n");
1864                 ret = -EINVAL;
1865                 goto err_release;
1866         }
1867
1868         /* Data from ucode file:  header followed by uCode images */
1869         ucode = (struct il_ucode_header *)ucode_raw->data;
1870
1871         il->ucode_ver = le32_to_cpu(ucode->ver);
1872         api_ver = IL_UCODE_API(il->ucode_ver);
1873         inst_size = il3945_ucode_get_inst_size(ucode);
1874         data_size = il3945_ucode_get_data_size(ucode);
1875         init_size = il3945_ucode_get_init_size(ucode);
1876         init_data_size = il3945_ucode_get_init_data_size(ucode);
1877         boot_size = il3945_ucode_get_boot_size(ucode);
1878         src = il3945_ucode_get_data(ucode);
1879
1880         /* api_ver should match the api version forming part of the
1881          * firmware filename ... but we don't check for that and only rely
1882          * on the API version read from firmware header from here on forward */
1883
1884         if (api_ver < api_min || api_ver > api_max) {
1885                 IL_ERR("Driver unable to support your firmware API. "
1886                        "Driver supports v%u, firmware is v%u.\n", api_max,
1887                        api_ver);
1888                 il->ucode_ver = 0;
1889                 ret = -EINVAL;
1890                 goto err_release;
1891         }
1892         if (api_ver != api_max)
1893                 IL_ERR("Firmware has old API version. Expected %u, "
1894                        "got %u. New firmware can be obtained "
1895                        "from http://www.intellinuxwireless.org.\n", api_max,
1896                        api_ver);
1897
1898         IL_INFO("loaded firmware version %u.%u.%u.%u\n",
1899                 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
1900                 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
1901
1902         snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
1903                  "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
1904                  IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
1905                  IL_UCODE_SERIAL(il->ucode_ver));
1906
1907         D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
1908         D_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
1909         D_INFO("f/w package hdr runtime data size = %u\n", data_size);
1910         D_INFO("f/w package hdr init inst size = %u\n", init_size);
1911         D_INFO("f/w package hdr init data size = %u\n", init_data_size);
1912         D_INFO("f/w package hdr boot inst size = %u\n", boot_size);
1913
1914         /* Verify size of file vs. image size info in file's header */
1915         if (ucode_raw->size !=
1916             il3945_ucode_get_header_size(api_ver) + inst_size + data_size +
1917             init_size + init_data_size + boot_size) {
1918
1919                 D_INFO("uCode file size %zd does not match expected size\n",
1920                        ucode_raw->size);
1921                 ret = -EINVAL;
1922                 goto err_release;
1923         }
1924
1925         /* Verify that uCode images will fit in card's SRAM */
1926         if (inst_size > IL39_MAX_INST_SIZE) {
1927                 D_INFO("uCode instr len %d too large to fit in\n", inst_size);
1928                 ret = -EINVAL;
1929                 goto err_release;
1930         }
1931
1932         if (data_size > IL39_MAX_DATA_SIZE) {
1933                 D_INFO("uCode data len %d too large to fit in\n", data_size);
1934                 ret = -EINVAL;
1935                 goto err_release;
1936         }
1937         if (init_size > IL39_MAX_INST_SIZE) {
1938                 D_INFO("uCode init instr len %d too large to fit in\n",
1939                        init_size);
1940                 ret = -EINVAL;
1941                 goto err_release;
1942         }
1943         if (init_data_size > IL39_MAX_DATA_SIZE) {
1944                 D_INFO("uCode init data len %d too large to fit in\n",
1945                        init_data_size);
1946                 ret = -EINVAL;
1947                 goto err_release;
1948         }
1949         if (boot_size > IL39_MAX_BSM_SIZE) {
1950                 D_INFO("uCode boot instr len %d too large to fit in\n",
1951                        boot_size);
1952                 ret = -EINVAL;
1953                 goto err_release;
1954         }
1955
1956         /* Allocate ucode buffers for card's bus-master loading ... */
1957
1958         /* Runtime instructions and 2 copies of data:
1959          * 1) unmodified from disk
1960          * 2) backup cache for save/restore during power-downs */
1961         il->ucode_code.len = inst_size;
1962         il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
1963
1964         il->ucode_data.len = data_size;
1965         il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
1966
1967         il->ucode_data_backup.len = data_size;
1968         il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
1969
1970         if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
1971             !il->ucode_data_backup.v_addr)
1972                 goto err_pci_alloc;
1973
1974         /* Initialization instructions and data */
1975         if (init_size && init_data_size) {
1976                 il->ucode_init.len = init_size;
1977                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
1978
1979                 il->ucode_init_data.len = init_data_size;
1980                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
1981
1982                 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
1983                         goto err_pci_alloc;
1984         }
1985
1986         /* Bootstrap (instructions only, no data) */
1987         if (boot_size) {
1988                 il->ucode_boot.len = boot_size;
1989                 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
1990
1991                 if (!il->ucode_boot.v_addr)
1992                         goto err_pci_alloc;
1993         }
1994
1995         /* Copy images into buffers for card's bus-master reads ... */
1996
1997         /* Runtime instructions (first block of data in file) */
1998         len = inst_size;
1999         D_INFO("Copying (but not loading) uCode instr len %zd\n", len);
2000         memcpy(il->ucode_code.v_addr, src, len);
2001         src += len;
2002
2003         D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2004                il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
2005
2006         /* Runtime data (2nd block)
2007          * NOTE:  Copy into backup buffer will be done in il3945_up()  */
2008         len = data_size;
2009         D_INFO("Copying (but not loading) uCode data len %zd\n", len);
2010         memcpy(il->ucode_data.v_addr, src, len);
2011         memcpy(il->ucode_data_backup.v_addr, src, len);
2012         src += len;
2013
2014         /* Initialization instructions (3rd block) */
2015         if (init_size) {
2016                 len = init_size;
2017                 D_INFO("Copying (but not loading) init instr len %zd\n", len);
2018                 memcpy(il->ucode_init.v_addr, src, len);
2019                 src += len;
2020         }
2021
2022         /* Initialization data (4th block) */
2023         if (init_data_size) {
2024                 len = init_data_size;
2025                 D_INFO("Copying (but not loading) init data len %zd\n", len);
2026                 memcpy(il->ucode_init_data.v_addr, src, len);
2027                 src += len;
2028         }
2029
2030         /* Bootstrap instructions (5th block) */
2031         len = boot_size;
2032         D_INFO("Copying (but not loading) boot instr len %zd\n", len);
2033         memcpy(il->ucode_boot.v_addr, src, len);
2034
2035         /* We have our copies now, allow OS release its copies */
2036         release_firmware(ucode_raw);
2037         return 0;
2038
2039 err_pci_alloc:
2040         IL_ERR("failed to allocate pci memory\n");
2041         ret = -ENOMEM;
2042         il3945_dealloc_ucode_pci(il);
2043
2044 err_release:
2045         release_firmware(ucode_raw);
2046
2047 error:
2048         return ret;
2049 }
2050
2051 /**
2052  * il3945_set_ucode_ptrs - Set uCode address location
2053  *
2054  * Tell initialization uCode where to find runtime uCode.
2055  *
2056  * BSM registers initially contain pointers to initialization uCode.
2057  * We need to replace them to load runtime uCode inst and data,
2058  * and to save runtime data when powering down.
2059  */
2060 static int
2061 il3945_set_ucode_ptrs(struct il_priv *il)
2062 {
2063         dma_addr_t pinst;
2064         dma_addr_t pdata;
2065
2066         /* bits 31:0 for 3945 */
2067         pinst = il->ucode_code.p_addr;
2068         pdata = il->ucode_data_backup.p_addr;
2069
2070         /* Tell bootstrap uCode where to find image to load */
2071         il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
2072         il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
2073         il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, il->ucode_data.len);
2074
2075         /* Inst byte count must be last to set up, bit 31 signals uCode
2076          *   that all new ptr/size info is in place */
2077         il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG,
2078                    il->ucode_code.len | BSM_DRAM_INST_LOAD);
2079
2080         D_INFO("Runtime uCode pointers are set.\n");
2081
2082         return 0;
2083 }
2084
2085 /**
2086  * il3945_init_alive_start - Called after N_ALIVE notification received
2087  *
2088  * Called after N_ALIVE notification received from "initialize" uCode.
2089  *
2090  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2091  */
2092 static void
2093 il3945_init_alive_start(struct il_priv *il)
2094 {
2095         /* Check alive response for "valid" sign from uCode */
2096         if (il->card_alive_init.is_valid != UCODE_VALID_OK) {
2097                 /* We had an error bringing up the hardware, so take it
2098                  * all the way back down so we can try again */
2099                 D_INFO("Initialize Alive failed.\n");
2100                 goto restart;
2101         }
2102
2103         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2104          * This is a paranoid check, because we would not have gotten the
2105          * "initialize" alive if code weren't properly loaded.  */
2106         if (il3945_verify_ucode(il)) {
2107                 /* Runtime instruction load was bad;
2108                  * take it all the way back down so we can try again */
2109                 D_INFO("Bad \"initialize\" uCode load.\n");
2110                 goto restart;
2111         }
2112
2113         /* Send pointers to protocol/runtime uCode image ... init code will
2114          * load and launch runtime uCode, which will send us another "Alive"
2115          * notification. */
2116         D_INFO("Initialization Alive received.\n");
2117         if (il3945_set_ucode_ptrs(il)) {
2118                 /* Runtime instruction load won't happen;
2119                  * take it all the way back down so we can try again */
2120                 D_INFO("Couldn't set up uCode pointers.\n");
2121                 goto restart;
2122         }
2123         return;
2124
2125 restart:
2126         queue_work(il->workqueue, &il->restart);
2127 }
2128
2129 /**
2130  * il3945_alive_start - called after N_ALIVE notification received
2131  *                   from protocol/runtime uCode (initialization uCode's
2132  *                   Alive gets handled by il3945_init_alive_start()).
2133  */
2134 static void
2135 il3945_alive_start(struct il_priv *il)
2136 {
2137         int thermal_spin = 0;
2138         u32 rfkill;
2139
2140         D_INFO("Runtime Alive received.\n");
2141
2142         if (il->card_alive.is_valid != UCODE_VALID_OK) {
2143                 /* We had an error bringing up the hardware, so take it
2144                  * all the way back down so we can try again */
2145                 D_INFO("Alive failed.\n");
2146                 goto restart;
2147         }
2148
2149         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2150          * This is a paranoid check, because we would not have gotten the
2151          * "runtime" alive if code weren't properly loaded.  */
2152         if (il3945_verify_ucode(il)) {
2153                 /* Runtime instruction load was bad;
2154                  * take it all the way back down so we can try again */
2155                 D_INFO("Bad runtime uCode load.\n");
2156                 goto restart;
2157         }
2158
2159         rfkill = il_rd_prph(il, APMG_RFKILL_REG);
2160         D_INFO("RFKILL status: 0x%x\n", rfkill);
2161
2162         if (rfkill & 0x1) {
2163                 clear_bit(S_RFKILL, &il->status);
2164                 /* if RFKILL is not on, then wait for thermal
2165                  * sensor in adapter to kick in */
2166                 while (il3945_hw_get_temperature(il) == 0) {
2167                         thermal_spin++;
2168                         udelay(10);
2169                 }
2170
2171                 if (thermal_spin)
2172                         D_INFO("Thermal calibration took %dus\n",
2173                                thermal_spin * 10);
2174         } else
2175                 set_bit(S_RFKILL, &il->status);
2176
2177         /* After the ALIVE response, we can send commands to 3945 uCode */
2178         set_bit(S_ALIVE, &il->status);
2179
2180         /* Enable watchdog to monitor the driver tx queues */
2181         il_setup_watchdog(il);
2182
2183         if (il_is_rfkill(il))
2184                 return;
2185
2186         ieee80211_wake_queues(il->hw);
2187
2188         il->active_rate = RATES_MASK_3945;
2189
2190         il_power_update_mode(il, true);
2191
2192         if (il_is_associated(il)) {
2193                 struct il3945_rxon_cmd *active_rxon =
2194                     (struct il3945_rxon_cmd *)(&il->active);
2195
2196                 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2197                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2198         } else {
2199                 /* Initialize our rx_config data */
2200                 il_connection_init_rx_config(il);
2201         }
2202
2203         /* Configure Bluetooth device coexistence support */
2204         il_send_bt_config(il);
2205
2206         set_bit(S_READY, &il->status);
2207
2208         /* Configure the adapter for unassociated operation */
2209         il3945_commit_rxon(il);
2210
2211         il3945_reg_txpower_periodic(il);
2212
2213         D_INFO("ALIVE processing complete.\n");
2214         wake_up(&il->wait_command_queue);
2215
2216         return;
2217
2218 restart:
2219         queue_work(il->workqueue, &il->restart);
2220 }
2221
2222 static void il3945_cancel_deferred_work(struct il_priv *il);
2223
2224 static void
2225 __il3945_down(struct il_priv *il)
2226 {
2227         unsigned long flags;
2228         int exit_pending;
2229
2230         D_INFO(DRV_NAME " is going down\n");
2231
2232         il_scan_cancel_timeout(il, 200);
2233
2234         exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
2235
2236         /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
2237          * to prevent rearm timer */
2238         del_timer_sync(&il->watchdog);
2239
2240         /* Station information will now be cleared in device */
2241         il_clear_ucode_stations(il);
2242         il_dealloc_bcast_stations(il);
2243         il_clear_driver_stations(il);
2244
2245         /* Unblock any waiting calls */
2246         wake_up_all(&il->wait_command_queue);
2247
2248         /* Wipe out the EXIT_PENDING status bit if we are not actually
2249          * exiting the module */
2250         if (!exit_pending)
2251                 clear_bit(S_EXIT_PENDING, &il->status);
2252
2253         /* stop and reset the on-board processor */
2254         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2255
2256         /* tell the device to stop sending interrupts */
2257         spin_lock_irqsave(&il->lock, flags);
2258         il_disable_interrupts(il);
2259         spin_unlock_irqrestore(&il->lock, flags);
2260         il3945_synchronize_irq(il);
2261
2262         if (il->mac80211_registered)
2263                 ieee80211_stop_queues(il->hw);
2264
2265         /* If we have not previously called il3945_init() then
2266          * clear all bits but the RF Kill bits and return */
2267         if (!il_is_init(il)) {
2268                 il->status =
2269                     test_bit(S_RFKILL, &il->status) << S_RFKILL |
2270                     test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2271                     test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2272                 goto exit;
2273         }
2274
2275         /* ...otherwise clear out all the status bits but the RF Kill
2276          * bit and continue taking the NIC down. */
2277         il->status &=
2278             test_bit(S_RFKILL, &il->status) << S_RFKILL |
2279             test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2280             test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
2281             test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2282
2283         /*
2284          * We disabled and synchronized interrupt, and priv->mutex is taken, so
2285          * here is the only thread which will program device registers, but
2286          * still have lockdep assertions, so we are taking reg_lock.
2287          */
2288         spin_lock_irq(&il->reg_lock);
2289         /* FIXME: il_grab_nic_access if rfkill is off ? */
2290
2291         il3945_hw_txq_ctx_stop(il);
2292         il3945_hw_rxq_stop(il);
2293         /* Power-down device's busmaster DMA clocks */
2294         _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2295         udelay(5);
2296         /* Stop the device, and put it in low power state */
2297         _il_apm_stop(il);
2298
2299         spin_unlock_irq(&il->reg_lock);
2300
2301         il3945_hw_txq_ctx_free(il);
2302 exit:
2303         memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
2304
2305         if (il->beacon_skb)
2306                 dev_kfree_skb(il->beacon_skb);
2307         il->beacon_skb = NULL;
2308
2309         /* clear out any free frames */
2310         il3945_clear_free_frames(il);
2311 }
2312
2313 static void
2314 il3945_down(struct il_priv *il)
2315 {
2316         mutex_lock(&il->mutex);
2317         __il3945_down(il);
2318         mutex_unlock(&il->mutex);
2319
2320         il3945_cancel_deferred_work(il);
2321 }
2322
2323 #define MAX_HW_RESTARTS 5
2324
2325 static int
2326 il3945_alloc_bcast_station(struct il_priv *il)
2327 {
2328         unsigned long flags;
2329         u8 sta_id;
2330
2331         spin_lock_irqsave(&il->sta_lock, flags);
2332         sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
2333         if (sta_id == IL_INVALID_STATION) {
2334                 IL_ERR("Unable to prepare broadcast station\n");
2335                 spin_unlock_irqrestore(&il->sta_lock, flags);
2336
2337                 return -EINVAL;
2338         }
2339
2340         il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
2341         il->stations[sta_id].used |= IL_STA_BCAST;
2342         spin_unlock_irqrestore(&il->sta_lock, flags);
2343
2344         return 0;
2345 }
2346
2347 static int
2348 __il3945_up(struct il_priv *il)
2349 {
2350         int rc, i;
2351
2352         rc = il3945_alloc_bcast_station(il);
2353         if (rc)
2354                 return rc;
2355
2356         if (test_bit(S_EXIT_PENDING, &il->status)) {
2357                 IL_WARN("Exit pending; will not bring the NIC up\n");
2358                 return -EIO;
2359         }
2360
2361         if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
2362                 IL_ERR("ucode not available for device bring up\n");
2363                 return -EIO;
2364         }
2365
2366         /* If platform's RF_KILL switch is NOT set to KILL */
2367         if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2368                 clear_bit(S_RFKILL, &il->status);
2369         else {
2370                 set_bit(S_RFKILL, &il->status);
2371                 return -ERFKILL;
2372         }
2373
2374         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2375
2376         rc = il3945_hw_nic_init(il);
2377         if (rc) {
2378                 IL_ERR("Unable to int nic\n");
2379                 return rc;
2380         }
2381
2382         /* make sure rfkill handshake bits are cleared */
2383         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2384         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2385
2386         /* clear (again), then enable host interrupts */
2387         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2388         il_enable_interrupts(il);
2389
2390         /* really make sure rfkill handshake bits are cleared */
2391         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2392         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2393
2394         /* Copy original ucode data image from disk into backup cache.
2395          * This will be used to initialize the on-board processor's
2396          * data SRAM for a clean start when the runtime program first loads. */
2397         memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
2398                il->ucode_data.len);
2399
2400         /* We return success when we resume from suspend and rf_kill is on. */
2401         if (test_bit(S_RFKILL, &il->status))
2402                 return 0;
2403
2404         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2405
2406                 /* load bootstrap state machine,
2407                  * load bootstrap program into processor's memory,
2408                  * prepare to load the "initialize" uCode */
2409                 rc = il->ops->load_ucode(il);
2410
2411                 if (rc) {
2412                         IL_ERR("Unable to set up bootstrap uCode: %d\n", rc);
2413                         continue;
2414                 }
2415
2416                 /* start card; "initialize" will load runtime ucode */
2417                 il3945_nic_start(il);
2418
2419                 D_INFO(DRV_NAME " is coming up\n");
2420
2421                 return 0;
2422         }
2423
2424         set_bit(S_EXIT_PENDING, &il->status);
2425         __il3945_down(il);
2426         clear_bit(S_EXIT_PENDING, &il->status);
2427
2428         /* tried to restart and config the device for as long as our
2429          * patience could withstand */
2430         IL_ERR("Unable to initialize device after %d attempts.\n", i);
2431         return -EIO;
2432 }
2433
2434 /*****************************************************************************
2435  *
2436  * Workqueue callbacks
2437  *
2438  *****************************************************************************/
2439
2440 static void
2441 il3945_bg_init_alive_start(struct work_struct *data)
2442 {
2443         struct il_priv *il =
2444             container_of(data, struct il_priv, init_alive_start.work);
2445
2446         mutex_lock(&il->mutex);
2447         if (test_bit(S_EXIT_PENDING, &il->status))
2448                 goto out;
2449
2450         il3945_init_alive_start(il);
2451 out:
2452         mutex_unlock(&il->mutex);
2453 }
2454
2455 static void
2456 il3945_bg_alive_start(struct work_struct *data)
2457 {
2458         struct il_priv *il =
2459             container_of(data, struct il_priv, alive_start.work);
2460
2461         mutex_lock(&il->mutex);
2462         if (test_bit(S_EXIT_PENDING, &il->status) || il->txq == NULL)
2463                 goto out;
2464
2465         il3945_alive_start(il);
2466 out:
2467         mutex_unlock(&il->mutex);
2468 }
2469
2470 /*
2471  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2472  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2473  * *is* readable even when device has been SW_RESET into low power mode
2474  * (e.g. during RF KILL).
2475  */
2476 static void
2477 il3945_rfkill_poll(struct work_struct *data)
2478 {
2479         struct il_priv *il =
2480             container_of(data, struct il_priv, _3945.rfkill_poll.work);
2481         bool old_rfkill = test_bit(S_RFKILL, &il->status);
2482         bool new_rfkill =
2483             !(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2484
2485         if (new_rfkill != old_rfkill) {
2486                 if (new_rfkill)
2487                         set_bit(S_RFKILL, &il->status);
2488                 else
2489                         clear_bit(S_RFKILL, &il->status);
2490
2491                 wiphy_rfkill_set_hw_state(il->hw->wiphy, new_rfkill);
2492
2493                 D_RF_KILL("RF_KILL bit toggled to %s.\n",
2494                           new_rfkill ? "disable radio" : "enable radio");
2495         }
2496
2497         /* Keep this running, even if radio now enabled.  This will be
2498          * cancelled in mac_start() if system decides to start again */
2499         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2500                            round_jiffies_relative(2 * HZ));
2501
2502 }
2503
2504 int
2505 il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
2506 {
2507         struct il_host_cmd cmd = {
2508                 .id = C_SCAN,
2509                 .len = sizeof(struct il3945_scan_cmd),
2510                 .flags = CMD_SIZE_HUGE,
2511         };
2512         struct il3945_scan_cmd *scan;
2513         u8 n_probes = 0;
2514         enum nl80211_band band;
2515         bool is_active = false;
2516         int ret;
2517         u16 len;
2518
2519         lockdep_assert_held(&il->mutex);
2520
2521         if (!il->scan_cmd) {
2522                 il->scan_cmd =
2523                     kmalloc(sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE,
2524                             GFP_KERNEL);
2525                 if (!il->scan_cmd) {
2526                         D_SCAN("Fail to allocate scan memory\n");
2527                         return -ENOMEM;
2528                 }
2529         }
2530         scan = il->scan_cmd;
2531         memset(scan, 0, sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE);
2532
2533         scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
2534         scan->quiet_time = IL_ACTIVE_QUIET_TIME;
2535
2536         if (il_is_associated(il)) {
2537                 u16 interval;
2538                 u32 extra;
2539                 u32 suspend_time = 100;
2540                 u32 scan_suspend_time = 100;
2541
2542                 D_INFO("Scanning while associated...\n");
2543
2544                 interval = vif->bss_conf.beacon_int;
2545
2546                 scan->suspend_time = 0;
2547                 scan->max_out_time = cpu_to_le32(200 * 1024);
2548                 if (!interval)
2549                         interval = suspend_time;
2550                 /*
2551                  * suspend time format:
2552                  *  0-19: beacon interval in usec (time before exec.)
2553                  * 20-23: 0
2554                  * 24-31: number of beacons (suspend between channels)
2555                  */
2556
2557                 extra = (suspend_time / interval) << 24;
2558                 scan_suspend_time =
2559                     0xFF0FFFFF & (extra | ((suspend_time % interval) * 1024));
2560
2561                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2562                 D_SCAN("suspend_time 0x%X beacon interval %d\n",
2563                        scan_suspend_time, interval);
2564         }
2565
2566         if (il->scan_request->n_ssids) {
2567                 int i, p = 0;
2568                 D_SCAN("Kicking off active scan\n");
2569                 for (i = 0; i < il->scan_request->n_ssids; i++) {
2570                         /* always does wildcard anyway */
2571                         if (!il->scan_request->ssids[i].ssid_len)
2572                                 continue;
2573                         scan->direct_scan[p].id = WLAN_EID_SSID;
2574                         scan->direct_scan[p].len =
2575                             il->scan_request->ssids[i].ssid_len;
2576                         memcpy(scan->direct_scan[p].ssid,
2577                                il->scan_request->ssids[i].ssid,
2578                                il->scan_request->ssids[i].ssid_len);
2579                         n_probes++;
2580                         p++;
2581                 }
2582                 is_active = true;
2583         } else
2584                 D_SCAN("Kicking off passive scan.\n");
2585
2586         /* We don't build a direct scan probe request; the uCode will do
2587          * that based on the direct_mask added to each channel entry */
2588         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2589         scan->tx_cmd.sta_id = il->hw_params.bcast_id;
2590         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2591
2592         /* flags + rate selection */
2593
2594         switch (il->scan_band) {
2595         case NL80211_BAND_2GHZ:
2596                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2597                 scan->tx_cmd.rate = RATE_1M_PLCP;
2598                 band = NL80211_BAND_2GHZ;
2599                 break;
2600         case NL80211_BAND_5GHZ:
2601                 scan->tx_cmd.rate = RATE_6M_PLCP;
2602                 band = NL80211_BAND_5GHZ;
2603                 break;
2604         default:
2605                 IL_WARN("Invalid scan band\n");
2606                 return -EIO;
2607         }
2608
2609         /*
2610          * If active scaning is requested but a certain channel is marked
2611          * passive, we can do active scanning if we detect transmissions. For
2612          * passive only scanning disable switching to active on any channel.
2613          */
2614         scan->good_CRC_th =
2615             is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
2616
2617         len =
2618             il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
2619                               vif->addr, il->scan_request->ie,
2620                               il->scan_request->ie_len,
2621                               IL_MAX_SCAN_SIZE - sizeof(*scan));
2622         scan->tx_cmd.len = cpu_to_le16(len);
2623
2624         /* select Rx antennas */
2625         scan->flags |= il3945_get_antenna_flags(il);
2626
2627         scan->channel_count =
2628             il3945_get_channels_for_scan(il, band, is_active, n_probes,
2629                                          (void *)&scan->data[len], vif);
2630         if (scan->channel_count == 0) {
2631                 D_SCAN("channel count %d\n", scan->channel_count);
2632                 return -EIO;
2633         }
2634
2635         cmd.len +=
2636             le16_to_cpu(scan->tx_cmd.len) +
2637             scan->channel_count * sizeof(struct il3945_scan_channel);
2638         cmd.data = scan;
2639         scan->len = cpu_to_le16(cmd.len);
2640
2641         set_bit(S_SCAN_HW, &il->status);
2642         ret = il_send_cmd_sync(il, &cmd);
2643         if (ret)
2644                 clear_bit(S_SCAN_HW, &il->status);
2645         return ret;
2646 }
2647
2648 void
2649 il3945_post_scan(struct il_priv *il)
2650 {
2651         /*
2652          * Since setting the RXON may have been deferred while
2653          * performing the scan, fire one off if needed
2654          */
2655         if (memcmp(&il->staging, &il->active, sizeof(il->staging)))
2656                 il3945_commit_rxon(il);
2657 }
2658
2659 static void
2660 il3945_bg_restart(struct work_struct *data)
2661 {
2662         struct il_priv *il = container_of(data, struct il_priv, restart);
2663
2664         if (test_bit(S_EXIT_PENDING, &il->status))
2665                 return;
2666
2667         if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
2668                 mutex_lock(&il->mutex);
2669                 il->is_open = 0;
2670                 mutex_unlock(&il->mutex);
2671                 il3945_down(il);
2672                 ieee80211_restart_hw(il->hw);
2673         } else {
2674                 il3945_down(il);
2675
2676                 mutex_lock(&il->mutex);
2677                 if (test_bit(S_EXIT_PENDING, &il->status)) {
2678                         mutex_unlock(&il->mutex);
2679                         return;
2680                 }
2681
2682                 __il3945_up(il);
2683                 mutex_unlock(&il->mutex);
2684         }
2685 }
2686
2687 static void
2688 il3945_bg_rx_replenish(struct work_struct *data)
2689 {
2690         struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
2691
2692         mutex_lock(&il->mutex);
2693         if (test_bit(S_EXIT_PENDING, &il->status))
2694                 goto out;
2695
2696         il3945_rx_replenish(il);
2697 out:
2698         mutex_unlock(&il->mutex);
2699 }
2700
2701 void
2702 il3945_post_associate(struct il_priv *il)
2703 {
2704         int rc = 0;
2705
2706         if (!il->vif || !il->is_open)
2707                 return;
2708
2709         D_ASSOC("Associated as %d to: %pM\n", il->vif->bss_conf.aid,
2710                 il->active.bssid_addr);
2711
2712         if (test_bit(S_EXIT_PENDING, &il->status))
2713                 return;
2714
2715         il_scan_cancel_timeout(il, 200);
2716
2717         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2718         il3945_commit_rxon(il);
2719
2720         rc = il_send_rxon_timing(il);
2721         if (rc)
2722                 IL_WARN("C_RXON_TIMING failed - " "Attempting to continue.\n");
2723
2724         il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2725
2726         il->staging.assoc_id = cpu_to_le16(il->vif->bss_conf.aid);
2727
2728         D_ASSOC("assoc id %d beacon interval %d\n", il->vif->bss_conf.aid,
2729                 il->vif->bss_conf.beacon_int);
2730
2731         if (il->vif->bss_conf.use_short_preamble)
2732                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2733         else
2734                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2735
2736         if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2737                 if (il->vif->bss_conf.use_short_slot)
2738                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2739                 else
2740                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2741         }
2742
2743         il3945_commit_rxon(il);
2744
2745         switch (il->vif->type) {
2746         case NL80211_IFTYPE_STATION:
2747                 il3945_rate_scale_init(il->hw, IL_AP_ID);
2748                 break;
2749         case NL80211_IFTYPE_ADHOC:
2750                 il3945_send_beacon_cmd(il);
2751                 break;
2752         default:
2753                 IL_ERR("%s Should not be called in %d mode\n", __func__,
2754                       il->vif->type);
2755                 break;
2756         }
2757 }
2758
2759 /*****************************************************************************
2760  *
2761  * mac80211 entry point functions
2762  *
2763  *****************************************************************************/
2764
2765 #define UCODE_READY_TIMEOUT     (2 * HZ)
2766
2767 static int
2768 il3945_mac_start(struct ieee80211_hw *hw)
2769 {
2770         struct il_priv *il = hw->priv;
2771         int ret;
2772
2773         /* we should be verifying the device is ready to be opened */
2774         mutex_lock(&il->mutex);
2775         D_MAC80211("enter\n");
2776
2777         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2778          * ucode filename and max sizes are card-specific. */
2779
2780         if (!il->ucode_code.len) {
2781                 ret = il3945_read_ucode(il);
2782                 if (ret) {
2783                         IL_ERR("Could not read microcode: %d\n", ret);
2784                         mutex_unlock(&il->mutex);
2785                         goto out_release_irq;
2786                 }
2787         }
2788
2789         ret = __il3945_up(il);
2790
2791         mutex_unlock(&il->mutex);
2792
2793         if (ret)
2794                 goto out_release_irq;
2795
2796         D_INFO("Start UP work.\n");
2797
2798         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
2799          * mac80211 will not be run successfully. */
2800         ret = wait_event_timeout(il->wait_command_queue,
2801                                  test_bit(S_READY, &il->status),
2802                                  UCODE_READY_TIMEOUT);
2803         if (!ret) {
2804                 if (!test_bit(S_READY, &il->status)) {
2805                         IL_ERR("Wait for START_ALIVE timeout after %dms.\n",
2806                                jiffies_to_msecs(UCODE_READY_TIMEOUT));
2807                         ret = -ETIMEDOUT;
2808                         goto out_release_irq;
2809                 }
2810         }
2811
2812         /* ucode is running and will send rfkill notifications,
2813          * no need to poll the killswitch state anymore */
2814         cancel_delayed_work(&il->_3945.rfkill_poll);
2815
2816         il->is_open = 1;
2817         D_MAC80211("leave\n");
2818         return 0;
2819
2820 out_release_irq:
2821         il->is_open = 0;
2822         D_MAC80211("leave - failed\n");
2823         return ret;
2824 }
2825
2826 static void
2827 il3945_mac_stop(struct ieee80211_hw *hw)
2828 {
2829         struct il_priv *il = hw->priv;
2830
2831         D_MAC80211("enter\n");
2832
2833         if (!il->is_open) {
2834                 D_MAC80211("leave - skip\n");
2835                 return;
2836         }
2837
2838         il->is_open = 0;
2839
2840         il3945_down(il);
2841
2842         flush_workqueue(il->workqueue);
2843
2844         /* start polling the killswitch state again */
2845         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2846                            round_jiffies_relative(2 * HZ));
2847
2848         D_MAC80211("leave\n");
2849 }
2850
2851 static void
2852 il3945_mac_tx(struct ieee80211_hw *hw,
2853                struct ieee80211_tx_control *control,
2854                struct sk_buff *skb)
2855 {
2856         struct il_priv *il = hw->priv;
2857
2858         D_MAC80211("enter\n");
2859
2860         D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2861              ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2862
2863         if (il3945_tx_skb(il, control->sta, skb))
2864                 dev_kfree_skb_any(skb);
2865
2866         D_MAC80211("leave\n");
2867 }
2868
2869 void
2870 il3945_config_ap(struct il_priv *il)
2871 {
2872         struct ieee80211_vif *vif = il->vif;
2873         int rc = 0;
2874
2875         if (test_bit(S_EXIT_PENDING, &il->status))
2876                 return;
2877
2878         /* The following should be done only at AP bring up */
2879         if (!(il_is_associated(il))) {
2880
2881                 /* RXON - unassoc (to set timing command) */
2882                 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2883                 il3945_commit_rxon(il);
2884
2885                 /* RXON Timing */
2886                 rc = il_send_rxon_timing(il);
2887                 if (rc)
2888                         IL_WARN("C_RXON_TIMING failed - "
2889                                 "Attempting to continue.\n");
2890
2891                 il->staging.assoc_id = 0;
2892
2893                 if (vif->bss_conf.use_short_preamble)
2894                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2895                 else
2896                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2897
2898                 if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2899                         if (vif->bss_conf.use_short_slot)
2900                                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2901                         else
2902                                 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2903                 }
2904                 /* restore RXON assoc */
2905                 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2906                 il3945_commit_rxon(il);
2907         }
2908         il3945_send_beacon_cmd(il);
2909 }
2910
2911 static int
2912 il3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2913                    struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2914                    struct ieee80211_key_conf *key)
2915 {
2916         struct il_priv *il = hw->priv;
2917         int ret = 0;
2918         u8 sta_id = IL_INVALID_STATION;
2919         u8 static_key;
2920
2921         D_MAC80211("enter\n");
2922
2923         if (il3945_mod_params.sw_crypto) {
2924                 D_MAC80211("leave - hwcrypto disabled\n");
2925                 return -EOPNOTSUPP;
2926         }
2927
2928         /*
2929          * To support IBSS RSN, don't program group keys in IBSS, the
2930          * hardware will then not attempt to decrypt the frames.
2931          */
2932         if (vif->type == NL80211_IFTYPE_ADHOC &&
2933             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
2934                 D_MAC80211("leave - IBSS RSN\n");
2935                 return -EOPNOTSUPP;
2936         }
2937
2938         static_key = !il_is_associated(il);
2939
2940         if (!static_key) {
2941                 sta_id = il_sta_id_or_broadcast(il, sta);
2942                 if (sta_id == IL_INVALID_STATION) {
2943                         D_MAC80211("leave - station not found\n");
2944                         return -EINVAL;
2945                 }
2946         }
2947
2948         mutex_lock(&il->mutex);
2949         il_scan_cancel_timeout(il, 100);
2950
2951         switch (cmd) {
2952         case SET_KEY:
2953                 if (static_key)
2954                         ret = il3945_set_static_key(il, key);
2955                 else
2956                         ret = il3945_set_dynamic_key(il, key, sta_id);
2957                 D_MAC80211("enable hwcrypto key\n");
2958                 break;
2959         case DISABLE_KEY:
2960                 if (static_key)
2961                         ret = il3945_remove_static_key(il);
2962                 else
2963                         ret = il3945_clear_sta_key_info(il, sta_id);
2964                 D_MAC80211("disable hwcrypto key\n");
2965                 break;
2966         default:
2967                 ret = -EINVAL;
2968         }
2969
2970         D_MAC80211("leave ret %d\n", ret);
2971         mutex_unlock(&il->mutex);
2972
2973         return ret;
2974 }
2975
2976 static int
2977 il3945_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2978                    struct ieee80211_sta *sta)
2979 {
2980         struct il_priv *il = hw->priv;
2981         struct il3945_sta_priv *sta_priv = (void *)sta->drv_priv;
2982         int ret;
2983         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2984         u8 sta_id;
2985
2986         mutex_lock(&il->mutex);
2987         D_INFO("station %pM\n", sta->addr);
2988         sta_priv->common.sta_id = IL_INVALID_STATION;
2989
2990         ret = il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
2991         if (ret) {
2992                 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
2993                 /* Should we return success if return code is EEXIST ? */
2994                 mutex_unlock(&il->mutex);
2995                 return ret;
2996         }
2997
2998         sta_priv->common.sta_id = sta_id;
2999
3000         /* Initialize rate scaling */
3001         D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
3002         il3945_rs_rate_init(il, sta, sta_id);
3003         mutex_unlock(&il->mutex);
3004
3005         return 0;
3006 }
3007
3008 static void
3009 il3945_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
3010                         unsigned int *total_flags, u64 multicast)
3011 {
3012         struct il_priv *il = hw->priv;
3013         __le32 filter_or = 0, filter_nand = 0;
3014
3015 #define CHK(test, flag) do { \
3016         if (*total_flags & (test))              \
3017                 filter_or |= (flag);            \
3018         else                                    \
3019                 filter_nand |= (flag);          \
3020         } while (0)
3021
3022         D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
3023                    *total_flags);
3024
3025         CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
3026         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3027         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3028
3029 #undef CHK
3030
3031         mutex_lock(&il->mutex);
3032
3033         il->staging.filter_flags &= ~filter_nand;
3034         il->staging.filter_flags |= filter_or;
3035
3036         /*
3037          * Not committing directly because hardware can perform a scan,
3038          * but even if hw is ready, committing here breaks for some reason,
3039          * we'll eventually commit the filter flags change anyway.
3040          */
3041
3042         mutex_unlock(&il->mutex);
3043
3044         /*
3045          * Receiving all multicast frames is always enabled by the
3046          * default flags setup in il_connection_init_rx_config()
3047          * since we currently do not support programming multicast
3048          * filters into the device.
3049          */
3050         *total_flags &=
3051             FIF_OTHER_BSS | FIF_ALLMULTI |
3052             FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3053 }
3054
3055 /*****************************************************************************
3056  *
3057  * sysfs attributes
3058  *
3059  *****************************************************************************/
3060
3061 #ifdef CONFIG_IWLEGACY_DEBUG
3062
3063 /*
3064  * The following adds a new attribute to the sysfs representation
3065  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3066  * used for controlling the debug level.
3067  *
3068  * See the level definitions in iwl for details.
3069  *
3070  * The debug_level being managed using sysfs below is a per device debug
3071  * level that is used instead of the global debug level if it (the per
3072  * device debug level) is set.
3073  */
3074 static ssize_t
3075 il3945_show_debug_level(struct device *d, struct device_attribute *attr,
3076                         char *buf)
3077 {
3078         struct il_priv *il = dev_get_drvdata(d);
3079         return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
3080 }
3081
3082 static ssize_t
3083 il3945_store_debug_level(struct device *d, struct device_attribute *attr,
3084                          const char *buf, size_t count)
3085 {
3086         struct il_priv *il = dev_get_drvdata(d);
3087         unsigned long val;
3088         int ret;
3089
3090         ret = kstrtoul(buf, 0, &val);
3091         if (ret)
3092                 IL_INFO("%s is not in hex or decimal form.\n", buf);
3093         else
3094                 il->debug_level = val;
3095
3096         return strnlen(buf, count);
3097 }
3098
3099 static DEVICE_ATTR(debug_level, 0644, il3945_show_debug_level,
3100                    il3945_store_debug_level);
3101
3102 #endif /* CONFIG_IWLEGACY_DEBUG */
3103
3104 static ssize_t
3105 il3945_show_temperature(struct device *d, struct device_attribute *attr,
3106                         char *buf)
3107 {
3108         struct il_priv *il = dev_get_drvdata(d);
3109
3110         if (!il_is_alive(il))
3111                 return -EAGAIN;
3112
3113         return sprintf(buf, "%d\n", il3945_hw_get_temperature(il));
3114 }
3115
3116 static DEVICE_ATTR(temperature, 0444, il3945_show_temperature, NULL);
3117
3118 static ssize_t
3119 il3945_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
3120 {
3121         struct il_priv *il = dev_get_drvdata(d);
3122         return sprintf(buf, "%d\n", il->tx_power_user_lmt);
3123 }
3124
3125 static ssize_t
3126 il3945_store_tx_power(struct device *d, struct device_attribute *attr,
3127                       const char *buf, size_t count)
3128 {
3129         struct il_priv *il = dev_get_drvdata(d);
3130         char *p = (char *)buf;
3131         u32 val;
3132
3133         val = simple_strtoul(p, &p, 10);
3134         if (p == buf)
3135                 IL_INFO(": %s is not in decimal form.\n", buf);
3136         else
3137                 il3945_hw_reg_set_txpower(il, val);
3138
3139         return count;
3140 }
3141
3142 static DEVICE_ATTR(tx_power, 0644, il3945_show_tx_power, il3945_store_tx_power);
3143
3144 static ssize_t
3145 il3945_show_flags(struct device *d, struct device_attribute *attr, char *buf)
3146 {
3147         struct il_priv *il = dev_get_drvdata(d);
3148
3149         return sprintf(buf, "0x%04X\n", il->active.flags);
3150 }
3151
3152 static ssize_t
3153 il3945_store_flags(struct device *d, struct device_attribute *attr,
3154                    const char *buf, size_t count)
3155 {
3156         struct il_priv *il = dev_get_drvdata(d);
3157         u32 flags = simple_strtoul(buf, NULL, 0);
3158
3159         mutex_lock(&il->mutex);
3160         if (le32_to_cpu(il->staging.flags) != flags) {
3161                 /* Cancel any currently running scans... */
3162                 if (il_scan_cancel_timeout(il, 100))
3163                         IL_WARN("Could not cancel scan.\n");
3164                 else {
3165                         D_INFO("Committing rxon.flags = 0x%04X\n", flags);
3166                         il->staging.flags = cpu_to_le32(flags);
3167                         il3945_commit_rxon(il);
3168                 }
3169         }
3170         mutex_unlock(&il->mutex);
3171
3172         return count;
3173 }
3174
3175 static DEVICE_ATTR(flags, 0644, il3945_show_flags, il3945_store_flags);
3176
3177 static ssize_t
3178 il3945_show_filter_flags(struct device *d, struct device_attribute *attr,
3179                          char *buf)
3180 {
3181         struct il_priv *il = dev_get_drvdata(d);
3182
3183         return sprintf(buf, "0x%04X\n", le32_to_cpu(il->active.filter_flags));
3184 }
3185
3186 static ssize_t
3187 il3945_store_filter_flags(struct device *d, struct device_attribute *attr,
3188                           const char *buf, size_t count)
3189 {
3190         struct il_priv *il = dev_get_drvdata(d);
3191         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3192
3193         mutex_lock(&il->mutex);
3194         if (le32_to_cpu(il->staging.filter_flags) != filter_flags) {
3195                 /* Cancel any currently running scans... */
3196                 if (il_scan_cancel_timeout(il, 100))
3197                         IL_WARN("Could not cancel scan.\n");
3198                 else {
3199                         D_INFO("Committing rxon.filter_flags = " "0x%04X\n",
3200                                filter_flags);
3201                         il->staging.filter_flags = cpu_to_le32(filter_flags);
3202                         il3945_commit_rxon(il);
3203                 }
3204         }
3205         mutex_unlock(&il->mutex);
3206
3207         return count;
3208 }
3209
3210 static DEVICE_ATTR(filter_flags, 0644, il3945_show_filter_flags,
3211                    il3945_store_filter_flags);
3212
3213 static ssize_t
3214 il3945_show_measurement(struct device *d, struct device_attribute *attr,
3215                         char *buf)
3216 {
3217         struct il_priv *il = dev_get_drvdata(d);
3218         struct il_spectrum_notification measure_report;
3219         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3220         u8 *data = (u8 *) &measure_report;
3221         unsigned long flags;
3222
3223         spin_lock_irqsave(&il->lock, flags);
3224         if (!(il->measurement_status & MEASUREMENT_READY)) {
3225                 spin_unlock_irqrestore(&il->lock, flags);
3226                 return 0;
3227         }
3228         memcpy(&measure_report, &il->measure_report, size);
3229         il->measurement_status = 0;
3230         spin_unlock_irqrestore(&il->lock, flags);
3231
3232         while (size && PAGE_SIZE - len) {
3233                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3234                                    PAGE_SIZE - len, true);
3235                 len = strlen(buf);
3236                 if (PAGE_SIZE - len)
3237                         buf[len++] = '\n';
3238
3239                 ofs += 16;
3240                 size -= min(size, 16U);
3241         }
3242
3243         return len;
3244 }
3245
3246 static ssize_t
3247 il3945_store_measurement(struct device *d, struct device_attribute *attr,
3248                          const char *buf, size_t count)
3249 {
3250         struct il_priv *il = dev_get_drvdata(d);
3251         struct ieee80211_measurement_params params = {
3252                 .channel = le16_to_cpu(il->active.channel),
3253                 .start_time = cpu_to_le64(il->_3945.last_tsf),
3254                 .duration = cpu_to_le16(1),
3255         };
3256         u8 type = IL_MEASURE_BASIC;
3257         u8 buffer[32];
3258         u8 channel;
3259
3260         if (count) {
3261                 char *p = buffer;
3262                 strlcpy(buffer, buf, sizeof(buffer));
3263                 channel = simple_strtoul(p, NULL, 0);
3264                 if (channel)
3265                         params.channel = channel;
3266
3267                 p = buffer;
3268                 while (*p && *p != ' ')
3269                         p++;
3270                 if (*p)
3271                         type = simple_strtoul(p + 1, NULL, 0);
3272         }
3273
3274         D_INFO("Invoking measurement of type %d on " "channel %d (for '%s')\n",
3275                type, params.channel, buf);
3276         il3945_get_measurement(il, &params, type);
3277
3278         return count;
3279 }
3280
3281 static DEVICE_ATTR(measurement, 0600, il3945_show_measurement,
3282                    il3945_store_measurement);
3283
3284 static ssize_t
3285 il3945_store_retry_rate(struct device *d, struct device_attribute *attr,
3286                         const char *buf, size_t count)
3287 {
3288         struct il_priv *il = dev_get_drvdata(d);
3289
3290         il->retry_rate = simple_strtoul(buf, NULL, 0);
3291         if (il->retry_rate <= 0)
3292                 il->retry_rate = 1;
3293
3294         return count;
3295 }
3296
3297 static ssize_t
3298 il3945_show_retry_rate(struct device *d, struct device_attribute *attr,
3299                        char *buf)
3300 {
3301         struct il_priv *il = dev_get_drvdata(d);
3302         return sprintf(buf, "%d", il->retry_rate);
3303 }
3304
3305 static DEVICE_ATTR(retry_rate, 0600, il3945_show_retry_rate,
3306                    il3945_store_retry_rate);
3307
3308 static ssize_t
3309 il3945_show_channels(struct device *d, struct device_attribute *attr, char *buf)
3310 {
3311         /* all this shit doesn't belong into sysfs anyway */
3312         return 0;
3313 }
3314
3315 static DEVICE_ATTR(channels, 0400, il3945_show_channels, NULL);
3316
3317 static ssize_t
3318 il3945_show_antenna(struct device *d, struct device_attribute *attr, char *buf)
3319 {
3320         struct il_priv *il = dev_get_drvdata(d);
3321
3322         if (!il_is_alive(il))
3323                 return -EAGAIN;
3324
3325         return sprintf(buf, "%d\n", il3945_mod_params.antenna);
3326 }
3327
3328 static ssize_t
3329 il3945_store_antenna(struct device *d, struct device_attribute *attr,
3330                      const char *buf, size_t count)
3331 {
3332         struct il_priv *il __maybe_unused = dev_get_drvdata(d);
3333         int ant;
3334
3335         if (count == 0)
3336                 return 0;
3337
3338         if (sscanf(buf, "%1i", &ant) != 1) {
3339                 D_INFO("not in hex or decimal form.\n");
3340                 return count;
3341         }
3342
3343         if (ant >= 0 && ant <= 2) {
3344                 D_INFO("Setting antenna select to %d.\n", ant);
3345                 il3945_mod_params.antenna = (enum il3945_antenna)ant;
3346         } else
3347                 D_INFO("Bad antenna select value %d.\n", ant);
3348
3349         return count;
3350 }
3351
3352 static DEVICE_ATTR(antenna, 0644, il3945_show_antenna, il3945_store_antenna);
3353
3354 static ssize_t
3355 il3945_show_status(struct device *d, struct device_attribute *attr, char *buf)
3356 {
3357         struct il_priv *il = dev_get_drvdata(d);
3358         if (!il_is_alive(il))
3359                 return -EAGAIN;
3360         return sprintf(buf, "0x%08x\n", (int)il->status);
3361 }
3362
3363 static DEVICE_ATTR(status, 0444, il3945_show_status, NULL);
3364
3365 static ssize_t
3366 il3945_dump_error_log(struct device *d, struct device_attribute *attr,
3367                       const char *buf, size_t count)
3368 {
3369         struct il_priv *il = dev_get_drvdata(d);
3370         char *p = (char *)buf;
3371
3372         if (p[0] == '1')
3373                 il3945_dump_nic_error_log(il);
3374
3375         return strnlen(buf, count);
3376 }
3377
3378 static DEVICE_ATTR(dump_errors, 0200, NULL, il3945_dump_error_log);
3379
3380 /*****************************************************************************
3381  *
3382  * driver setup and tear down
3383  *
3384  *****************************************************************************/
3385
3386 static void
3387 il3945_setup_deferred_work(struct il_priv *il)
3388 {
3389         il->workqueue = create_singlethread_workqueue(DRV_NAME);
3390
3391         init_waitqueue_head(&il->wait_command_queue);
3392
3393         INIT_WORK(&il->restart, il3945_bg_restart);
3394         INIT_WORK(&il->rx_replenish, il3945_bg_rx_replenish);
3395         INIT_DELAYED_WORK(&il->init_alive_start, il3945_bg_init_alive_start);
3396         INIT_DELAYED_WORK(&il->alive_start, il3945_bg_alive_start);
3397         INIT_DELAYED_WORK(&il->_3945.rfkill_poll, il3945_rfkill_poll);
3398
3399         il_setup_scan_deferred_work(il);
3400
3401         il3945_hw_setup_deferred_work(il);
3402
3403         timer_setup(&il->watchdog, il_bg_watchdog, 0);
3404
3405         tasklet_init(&il->irq_tasklet,
3406                      (void (*)(unsigned long))il3945_irq_tasklet,
3407                      (unsigned long)il);
3408 }
3409
3410 static void
3411 il3945_cancel_deferred_work(struct il_priv *il)
3412 {
3413         il3945_hw_cancel_deferred_work(il);
3414
3415         cancel_delayed_work_sync(&il->init_alive_start);
3416         cancel_delayed_work(&il->alive_start);
3417
3418         il_cancel_scan_deferred_work(il);
3419 }
3420
3421 static struct attribute *il3945_sysfs_entries[] = {
3422         &dev_attr_antenna.attr,
3423         &dev_attr_channels.attr,
3424         &dev_attr_dump_errors.attr,
3425         &dev_attr_flags.attr,
3426         &dev_attr_filter_flags.attr,
3427         &dev_attr_measurement.attr,
3428         &dev_attr_retry_rate.attr,
3429         &dev_attr_status.attr,
3430         &dev_attr_temperature.attr,
3431         &dev_attr_tx_power.attr,
3432 #ifdef CONFIG_IWLEGACY_DEBUG
3433         &dev_attr_debug_level.attr,
3434 #endif
3435         NULL
3436 };
3437
3438 static const struct attribute_group il3945_attribute_group = {
3439         .name = NULL,           /* put in device directory */
3440         .attrs = il3945_sysfs_entries,
3441 };
3442
3443 static struct ieee80211_ops il3945_mac_ops __ro_after_init = {
3444         .tx = il3945_mac_tx,
3445         .start = il3945_mac_start,
3446         .stop = il3945_mac_stop,
3447         .add_interface = il_mac_add_interface,
3448         .remove_interface = il_mac_remove_interface,
3449         .change_interface = il_mac_change_interface,
3450         .config = il_mac_config,
3451         .configure_filter = il3945_configure_filter,
3452         .set_key = il3945_mac_set_key,
3453         .conf_tx = il_mac_conf_tx,
3454         .reset_tsf = il_mac_reset_tsf,
3455         .bss_info_changed = il_mac_bss_info_changed,
3456         .hw_scan = il_mac_hw_scan,
3457         .sta_add = il3945_mac_sta_add,
3458         .sta_remove = il_mac_sta_remove,
3459         .tx_last_beacon = il_mac_tx_last_beacon,
3460         .flush = il_mac_flush,
3461 };
3462
3463 static int
3464 il3945_init_drv(struct il_priv *il)
3465 {
3466         int ret;
3467         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
3468
3469         il->retry_rate = 1;
3470         il->beacon_skb = NULL;
3471
3472         spin_lock_init(&il->sta_lock);
3473         spin_lock_init(&il->hcmd_lock);
3474
3475         INIT_LIST_HEAD(&il->free_frames);
3476
3477         mutex_init(&il->mutex);
3478
3479         il->ieee_channels = NULL;
3480         il->ieee_rates = NULL;
3481         il->band = NL80211_BAND_2GHZ;
3482
3483         il->iw_mode = NL80211_IFTYPE_STATION;
3484         il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
3485
3486         /* initialize force reset */
3487         il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
3488
3489         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3490                 IL_WARN("Unsupported EEPROM version: 0x%04X\n",
3491                         eeprom->version);
3492                 ret = -EINVAL;
3493                 goto err;
3494         }
3495         ret = il_init_channel_map(il);
3496         if (ret) {
3497                 IL_ERR("initializing regulatory failed: %d\n", ret);
3498                 goto err;
3499         }
3500
3501         /* Set up txpower settings in driver for all channels */
3502         if (il3945_txpower_set_from_eeprom(il)) {
3503                 ret = -EIO;
3504                 goto err_free_channel_map;
3505         }
3506
3507         ret = il_init_geos(il);
3508         if (ret) {
3509                 IL_ERR("initializing geos failed: %d\n", ret);
3510                 goto err_free_channel_map;
3511         }
3512         il3945_init_hw_rates(il, il->ieee_rates);
3513
3514         return 0;
3515
3516 err_free_channel_map:
3517         il_free_channel_map(il);
3518 err:
3519         return ret;
3520 }
3521
3522 #define IL3945_MAX_PROBE_REQUEST        200
3523
3524 static int
3525 il3945_setup_mac(struct il_priv *il)
3526 {
3527         int ret;
3528         struct ieee80211_hw *hw = il->hw;
3529
3530         hw->rate_control_algorithm = "iwl-3945-rs";
3531         hw->sta_data_size = sizeof(struct il3945_sta_priv);
3532         hw->vif_data_size = sizeof(struct il_vif_priv);
3533
3534         /* Tell mac80211 our characteristics */
3535         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
3536         ieee80211_hw_set(hw, SUPPORTS_PS);
3537         ieee80211_hw_set(hw, SIGNAL_DBM);
3538         ieee80211_hw_set(hw, SPECTRUM_MGMT);
3539
3540         hw->wiphy->interface_modes =
3541             BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
3542
3543         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
3544         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
3545                                        REGULATORY_DISABLE_BEACON_HINTS;
3546
3547         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
3548
3549         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3550         /* we create the 802.11 header and a zero-length SSID element */
3551         hw->wiphy->max_scan_ie_len = IL3945_MAX_PROBE_REQUEST - 24 - 2;
3552
3553         /* Default value; 4 EDCA QOS priorities */
3554         hw->queues = 4;
3555
3556         if (il->bands[NL80211_BAND_2GHZ].n_channels)
3557                 il->hw->wiphy->bands[NL80211_BAND_2GHZ] =
3558                     &il->bands[NL80211_BAND_2GHZ];
3559
3560         if (il->bands[NL80211_BAND_5GHZ].n_channels)
3561                 il->hw->wiphy->bands[NL80211_BAND_5GHZ] =
3562                     &il->bands[NL80211_BAND_5GHZ];
3563
3564         il_leds_init(il);
3565
3566         wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
3567
3568         ret = ieee80211_register_hw(il->hw);
3569         if (ret) {
3570                 IL_ERR("Failed to register hw (error %d)\n", ret);
3571                 return ret;
3572         }
3573         il->mac80211_registered = 1;
3574
3575         return 0;
3576 }
3577
3578 static int
3579 il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3580 {
3581         int err = 0;
3582         struct il_priv *il;
3583         struct ieee80211_hw *hw;
3584         struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
3585         struct il3945_eeprom *eeprom;
3586         unsigned long flags;
3587
3588         /***********************
3589          * 1. Allocating HW data
3590          * ********************/
3591
3592         hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il3945_mac_ops);
3593         if (!hw) {
3594                 err = -ENOMEM;
3595                 goto out;
3596         }
3597         il = hw->priv;
3598         il->hw = hw;
3599         SET_IEEE80211_DEV(hw, &pdev->dev);
3600
3601         il->cmd_queue = IL39_CMD_QUEUE_NUM;
3602
3603         D_INFO("*** LOAD DRIVER ***\n");
3604         il->cfg = cfg;
3605         il->ops = &il3945_ops;
3606 #ifdef CONFIG_IWLEGACY_DEBUGFS
3607         il->debugfs_ops = &il3945_debugfs_ops;
3608 #endif
3609         il->pci_dev = pdev;
3610         il->inta_mask = CSR_INI_SET_MASK;
3611
3612         /***************************
3613          * 2. Initializing PCI bus
3614          * *************************/
3615         pci_disable_link_state(pdev,
3616                                PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3617                                PCIE_LINK_STATE_CLKPM);
3618
3619         if (pci_enable_device(pdev)) {
3620                 err = -ENODEV;
3621                 goto out_ieee80211_free_hw;
3622         }
3623
3624         pci_set_master(pdev);
3625
3626         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3627         if (!err)
3628                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3629         if (err) {
3630                 IL_WARN("No suitable DMA available.\n");
3631                 goto out_pci_disable_device;
3632         }
3633
3634         pci_set_drvdata(pdev, il);
3635         err = pci_request_regions(pdev, DRV_NAME);
3636         if (err)
3637                 goto out_pci_disable_device;
3638
3639         /***********************
3640          * 3. Read REV Register
3641          * ********************/
3642         il->hw_base = pci_ioremap_bar(pdev, 0);
3643         if (!il->hw_base) {
3644                 err = -ENODEV;
3645                 goto out_pci_release_regions;
3646         }
3647
3648         D_INFO("pci_resource_len = 0x%08llx\n",
3649                (unsigned long long)pci_resource_len(pdev, 0));
3650         D_INFO("pci_resource_base = %p\n", il->hw_base);
3651
3652         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3653          * PCI Tx retries from interfering with C3 CPU state */
3654         pci_write_config_byte(pdev, 0x41, 0x00);
3655
3656         /* these spin locks will be used in apm_init and EEPROM access
3657          * we should init now
3658          */
3659         spin_lock_init(&il->reg_lock);
3660         spin_lock_init(&il->lock);
3661
3662         /*
3663          * stop and reset the on-board processor just in case it is in a
3664          * strange state ... like being left stranded by a primary kernel
3665          * and this is now the kdump kernel trying to start up
3666          */
3667         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3668
3669         /***********************
3670          * 4. Read EEPROM
3671          * ********************/
3672
3673         /* Read the EEPROM */
3674         err = il_eeprom_init(il);
3675         if (err) {
3676                 IL_ERR("Unable to init EEPROM\n");
3677                 goto out_iounmap;
3678         }
3679         /* MAC Address location in EEPROM same for 3945/4965 */
3680         eeprom = (struct il3945_eeprom *)il->eeprom;
3681         D_INFO("MAC address: %pM\n", eeprom->mac_address);
3682         SET_IEEE80211_PERM_ADDR(il->hw, eeprom->mac_address);
3683
3684         /***********************
3685          * 5. Setup HW Constants
3686          * ********************/
3687         /* Device-specific setup */
3688         err = il3945_hw_set_hw_params(il);
3689         if (err) {
3690                 IL_ERR("failed to set hw settings\n");
3691                 goto out_eeprom_free;
3692         }
3693
3694         /***********************
3695          * 6. Setup il
3696          * ********************/
3697
3698         err = il3945_init_drv(il);
3699         if (err) {
3700                 IL_ERR("initializing driver failed\n");
3701                 goto out_unset_hw_params;
3702         }
3703
3704         IL_INFO("Detected Intel Wireless WiFi Link %s\n", il->cfg->name);
3705
3706         /***********************
3707          * 7. Setup Services
3708          * ********************/
3709
3710         spin_lock_irqsave(&il->lock, flags);
3711         il_disable_interrupts(il);
3712         spin_unlock_irqrestore(&il->lock, flags);
3713
3714         pci_enable_msi(il->pci_dev);
3715
3716         err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
3717         if (err) {
3718                 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
3719                 goto out_disable_msi;
3720         }
3721
3722         err = sysfs_create_group(&pdev->dev.kobj, &il3945_attribute_group);
3723         if (err) {
3724                 IL_ERR("failed to create sysfs device attributes\n");
3725                 goto out_release_irq;
3726         }
3727
3728         il_set_rxon_channel(il, &il->bands[NL80211_BAND_2GHZ].channels[5]);
3729         il3945_setup_deferred_work(il);
3730         il3945_setup_handlers(il);
3731         il_power_initialize(il);
3732
3733         /*********************************
3734          * 8. Setup and Register mac80211
3735          * *******************************/
3736
3737         il_enable_interrupts(il);
3738
3739         err = il3945_setup_mac(il);
3740         if (err)
3741                 goto out_remove_sysfs;
3742
3743         il_dbgfs_register(il, DRV_NAME);
3744
3745         /* Start monitoring the killswitch */
3746         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, 2 * HZ);
3747
3748         return 0;
3749
3750 out_remove_sysfs:
3751         destroy_workqueue(il->workqueue);
3752         il->workqueue = NULL;
3753         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3754 out_release_irq:
3755         free_irq(il->pci_dev->irq, il);
3756 out_disable_msi:
3757         pci_disable_msi(il->pci_dev);
3758         il_free_geos(il);
3759         il_free_channel_map(il);
3760 out_unset_hw_params:
3761         il3945_unset_hw_params(il);
3762 out_eeprom_free:
3763         il_eeprom_free(il);
3764 out_iounmap:
3765         iounmap(il->hw_base);
3766 out_pci_release_regions:
3767         pci_release_regions(pdev);
3768 out_pci_disable_device:
3769         pci_disable_device(pdev);
3770 out_ieee80211_free_hw:
3771         ieee80211_free_hw(il->hw);
3772 out:
3773         return err;
3774 }
3775
3776 static void
3777 il3945_pci_remove(struct pci_dev *pdev)
3778 {
3779         struct il_priv *il = pci_get_drvdata(pdev);
3780         unsigned long flags;
3781
3782         if (!il)
3783                 return;
3784
3785         D_INFO("*** UNLOAD DRIVER ***\n");
3786
3787         il_dbgfs_unregister(il);
3788
3789         set_bit(S_EXIT_PENDING, &il->status);
3790
3791         il_leds_exit(il);
3792
3793         if (il->mac80211_registered) {
3794                 ieee80211_unregister_hw(il->hw);
3795                 il->mac80211_registered = 0;
3796         } else {
3797                 il3945_down(il);
3798         }
3799
3800         /*
3801          * Make sure device is reset to low power before unloading driver.
3802          * This may be redundant with il_down(), but there are paths to
3803          * run il_down() without calling apm_ops.stop(), and there are
3804          * paths to avoid running il_down() at all before leaving driver.
3805          * This (inexpensive) call *makes sure* device is reset.
3806          */
3807         il_apm_stop(il);
3808
3809         /* make sure we flush any pending irq or
3810          * tasklet for the driver
3811          */
3812         spin_lock_irqsave(&il->lock, flags);
3813         il_disable_interrupts(il);
3814         spin_unlock_irqrestore(&il->lock, flags);
3815
3816         il3945_synchronize_irq(il);
3817
3818         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3819
3820         cancel_delayed_work_sync(&il->_3945.rfkill_poll);
3821
3822         il3945_dealloc_ucode_pci(il);
3823
3824         if (il->rxq.bd)
3825                 il3945_rx_queue_free(il, &il->rxq);
3826         il3945_hw_txq_ctx_free(il);
3827
3828         il3945_unset_hw_params(il);
3829
3830         /*netif_stop_queue(dev); */
3831         flush_workqueue(il->workqueue);
3832
3833         /* ieee80211_unregister_hw calls il3945_mac_stop, which flushes
3834          * il->workqueue... so we can't take down the workqueue
3835          * until now... */
3836         destroy_workqueue(il->workqueue);
3837         il->workqueue = NULL;
3838
3839         free_irq(pdev->irq, il);
3840         pci_disable_msi(pdev);
3841
3842         iounmap(il->hw_base);
3843         pci_release_regions(pdev);
3844         pci_disable_device(pdev);
3845
3846         il_free_channel_map(il);
3847         il_free_geos(il);
3848         kfree(il->scan_cmd);
3849         if (il->beacon_skb)
3850                 dev_kfree_skb(il->beacon_skb);
3851
3852         ieee80211_free_hw(il->hw);
3853 }
3854
3855 /*****************************************************************************
3856  *
3857  * driver and module entry point
3858  *
3859  *****************************************************************************/
3860
3861 static struct pci_driver il3945_driver = {
3862         .name = DRV_NAME,
3863         .id_table = il3945_hw_card_ids,
3864         .probe = il3945_pci_probe,
3865         .remove = il3945_pci_remove,
3866         .driver.pm = IL_LEGACY_PM_OPS,
3867 };
3868
3869 static int __init
3870 il3945_init(void)
3871 {
3872
3873         int ret;
3874         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3875         pr_info(DRV_COPYRIGHT "\n");
3876
3877         /*
3878          * Disabling hardware scan means that mac80211 will perform scans
3879          * "the hard way", rather than using device's scan.
3880          */
3881         if (il3945_mod_params.disable_hw_scan) {
3882                 pr_info("hw_scan is disabled\n");
3883                 il3945_mac_ops.hw_scan = NULL;
3884         }
3885
3886         ret = il3945_rate_control_register();
3887         if (ret) {
3888                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3889                 return ret;
3890         }
3891
3892         ret = pci_register_driver(&il3945_driver);
3893         if (ret) {
3894                 pr_err("Unable to initialize PCI module\n");
3895                 goto error_register;
3896         }
3897
3898         return ret;
3899
3900 error_register:
3901         il3945_rate_control_unregister();
3902         return ret;
3903 }
3904
3905 static void __exit
3906 il3945_exit(void)
3907 {
3908         pci_unregister_driver(&il3945_driver);
3909         il3945_rate_control_unregister();
3910 }
3911
3912 MODULE_FIRMWARE(IL3945_MODULE_FIRMWARE(IL3945_UCODE_API_MAX));
3913
3914 module_param_named(antenna, il3945_mod_params.antenna, int, 0444);
3915 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3916 module_param_named(swcrypto, il3945_mod_params.sw_crypto, int, 0444);
3917 MODULE_PARM_DESC(swcrypto, "using software crypto (default 1 [software])");
3918 module_param_named(disable_hw_scan, il3945_mod_params.disable_hw_scan, int,
3919                    0444);
3920 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
3921 #ifdef CONFIG_IWLEGACY_DEBUG
3922 module_param_named(debug, il_debug_level, uint, 0644);
3923 MODULE_PARM_DESC(debug, "debug output mask");
3924 #endif
3925 module_param_named(fw_restart, il3945_mod_params.restart_fw, int, 0444);
3926 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3927
3928 module_exit(il3945_exit);
3929 module_init(il3945_init);