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 <[email protected]>
  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     "<[email protected]>"
  64
  65 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  66 MODULE_VERSION(DRV_VERSION);
  67 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  68 MODULE_LICENSE("GPL");
  69
  70  /* module parameters */
  71 struct il_mod_params il3945_mod_params = {
  72         .sw_crypto = 1,
  73         .restart_fw = 1,
  74         .disable_hw_scan = 1,
  75         /* the rest are 0 by default */
  76 };
  77
  78 /**
  79  * il3945_get_antenna_flags - Get antenna flags for RXON command
  80  * @il: eeprom and antenna fields are used to determine antenna flags
  81  *
  82  * il->eeprom39  is used to determine if antenna AUX/MAIN are reversed
  83  * il3945_mod_params.antenna specifies the antenna diversity mode:
  84  *
  85  * IL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
  86  * IL_ANTENNA_MAIN      - Force MAIN antenna
  87  * IL_ANTENNA_AUX       - Force AUX antenna
  88  */
  89 __le32
  90 il3945_get_antenna_flags(const struct il_priv *il)
  91 {
  92         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
  93
  94         switch (il3945_mod_params.antenna) {
  95         case IL_ANTENNA_DIVERSITY:
  96                 return 0;
  97
  98         case IL_ANTENNA_MAIN:
  99                 if (eeprom->antenna_switch_type)
 100                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 101                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 102
 103         case IL_ANTENNA_AUX:
 104                 if (eeprom->antenna_switch_type)
 105                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 106                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 107         }
 108
 109         /* bad antenna selector value */
 110         IL_ERR("Bad antenna selector value (0x%x)\n",
 111                il3945_mod_params.antenna);
 112
 113         return 0;               /* "diversity" is default if error */
 114 }
 115
 116 static int
 117 il3945_set_ccmp_dynamic_key_info(struct il_priv *il,
 118                                  struct ieee80211_key_conf *keyconf, u8 sta_id)
 119 {
 120         unsigned long flags;
 121         __le16 key_flags = 0;
 122         int ret;
 123
 124         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 125         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 126
 127         if (sta_id == il->hw_params.bcast_id)
 128                 key_flags |= STA_KEY_MULTICAST_MSK;
 129
 130         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 131         keyconf->hw_key_idx = keyconf->keyidx;
 132         key_flags &= ~STA_KEY_FLG_INVALID;
 133
 134         spin_lock_irqsave(&il->sta_lock, flags);
 135         il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 136         il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 137         memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
 138
 139         memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen);
 140
 141         if ((il->stations[sta_id].sta.key.
 142              key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
 143                 il->stations[sta_id].sta.key.key_offset =
 144                     il_get_free_ucode_key_idx(il);
 145         /* else, we are overriding an existing key => no need to allocated room
 146          * in uCode. */
 147
 148         WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 149              "no space for a new key");
 150
 151         il->stations[sta_id].sta.key.key_flags = key_flags;
 152         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 153         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 154
 155         D_INFO("hwcrypto: modify ucode station key info\n");
 156
 157         ret = il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
 158
 159         spin_unlock_irqrestore(&il->sta_lock, flags);
 160
 161         return ret;
 162 }
 163
 164 static int
 165 il3945_set_tkip_dynamic_key_info(struct il_priv *il,
 166                                  struct ieee80211_key_conf *keyconf, u8 sta_id)
 167 {
 168         return -EOPNOTSUPP;
 169 }
 170
 171 static int
 172 il3945_set_wep_dynamic_key_info(struct il_priv *il,
 173                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 174 {
 175         return -EOPNOTSUPP;
 176 }
 177
 178 static int
 179 il3945_clear_sta_key_info(struct il_priv *il, u8 sta_id)
 180 {
 181         unsigned long flags;
 182         struct il_addsta_cmd sta_cmd;
 183
 184         spin_lock_irqsave(&il->sta_lock, flags);
 185         memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
 186         memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo));
 187         il->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 188         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 189         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 190         memcpy(&sta_cmd, &il->stations[sta_id].sta,
 191                sizeof(struct il_addsta_cmd));
 192         spin_unlock_irqrestore(&il->sta_lock, flags);
 193
 194         D_INFO("hwcrypto: clear ucode station key info\n");
 195         return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
 196 }
 197
 198 static int
 199 il3945_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
 200                        u8 sta_id)
 201 {
 202         int ret = 0;
 203
 204         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 205
 206         switch (keyconf->cipher) {
 207         case WLAN_CIPHER_SUITE_CCMP:
 208                 ret = il3945_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
 209                 break;
 210         case WLAN_CIPHER_SUITE_TKIP:
 211                 ret = il3945_set_tkip_dynamic_key_info(il, keyconf, sta_id);
 212                 break;
 213         case WLAN_CIPHER_SUITE_WEP40:
 214         case WLAN_CIPHER_SUITE_WEP104:
 215                 ret = il3945_set_wep_dynamic_key_info(il, keyconf, sta_id);
 216                 break;
 217         default:
 218                 IL_ERR("Unknown alg: %s alg=%x\n", __func__, keyconf->cipher);
 219                 ret = -EINVAL;
 220         }
 221
 222         D_WEP("Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
 223               keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret);
 224
 225         return ret;
 226 }
 227
 228 static int
 229 il3945_remove_static_key(struct il_priv *il)
 230 {
 231         return -EOPNOTSUPP;
 232 }
 233
 234 static int
 235 il3945_set_static_key(struct il_priv *il, struct ieee80211_key_conf *key)
 236 {
 237         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 238             key->cipher == WLAN_CIPHER_SUITE_WEP104)
 239                 return -EOPNOTSUPP;
 240
 241         IL_ERR("Static key invalid: cipher %x\n", key->cipher);
 242         return -EINVAL;
 243 }
 244
 245 static void
 246 il3945_clear_free_frames(struct il_priv *il)
 247 {
 248         struct list_head *element;
 249
 250         D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
 251
 252         while (!list_empty(&il->free_frames)) {
 253                 element = il->free_frames.next;
 254                 list_del(element);
 255                 kfree(list_entry(element, struct il3945_frame, list));
 256                 il->frames_count--;
 257         }
 258
 259         if (il->frames_count) {
 260                 IL_WARN("%d frames still in use.  Did we lose one?\n",
 261                         il->frames_count);
 262                 il->frames_count = 0;
 263         }
 264 }
 265
 266 static struct il3945_frame *
 267 il3945_get_free_frame(struct il_priv *il)
 268 {
 269         struct il3945_frame *frame;
 270         struct list_head *element;
 271         if (list_empty(&il->free_frames)) {
 272                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 273                 if (!frame) {
 274                         IL_ERR("Could not allocate frame!\n");
 275                         return NULL;
 276                 }
 277
 278                 il->frames_count++;
 279                 return frame;
 280         }
 281
 282         element = il->free_frames.next;
 283         list_del(element);
 284         return list_entry(element, struct il3945_frame, list);
 285 }
 286
 287 static void
 288 il3945_free_frame(struct il_priv *il, struct il3945_frame *frame)
 289 {
 290         memset(frame, 0, sizeof(*frame));
 291         list_add(&frame->list, &il->free_frames);
 292 }
 293
 294 unsigned int
 295 il3945_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
 296                          int left)
 297 {
 298
 299         if (!il_is_associated(il) || !il->beacon_skb)
 300                 return 0;
 301
 302         if (il->beacon_skb->len > left)
 303                 return 0;
 304
 305         memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
 306
 307         return il->beacon_skb->len;
 308 }
 309
 310 static int
 311 il3945_send_beacon_cmd(struct il_priv *il)
 312 {
 313         struct il3945_frame *frame;
 314         unsigned int frame_size;
 315         int rc;
 316         u8 rate;
 317
 318         frame = il3945_get_free_frame(il);
 319
 320         if (!frame) {
 321                 IL_ERR("Could not obtain free frame buffer for beacon "
 322                        "command.\n");
 323                 return -ENOMEM;
 324         }
 325
 326         rate = il_get_lowest_plcp(il);
 327
 328         frame_size = il3945_hw_get_beacon_cmd(il, frame, rate);
 329
 330         rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
 331
 332         il3945_free_frame(il, frame);
 333
 334         return rc;
 335 }
 336
 337 static void
 338 il3945_unset_hw_params(struct il_priv *il)
 339 {
 340         if (il->_3945.shared_virt)
 341                 dma_free_coherent(&il->pci_dev->dev,
 342                                   sizeof(struct il3945_shared),
 343                                   il->_3945.shared_virt, il->_3945.shared_phys);
 344 }
 345
 346 static void
 347 il3945_build_tx_cmd_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
 348                              struct il_device_cmd *cmd,
 349                              struct sk_buff *skb_frag, int sta_id)
 350 {
 351         struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 352         struct il_hw_key *keyinfo = &il->stations[sta_id].keyinfo;
 353
 354         tx_cmd->sec_ctl = 0;
 355
 356         switch (keyinfo->cipher) {
 357         case WLAN_CIPHER_SUITE_CCMP:
 358                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 359                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 360                 D_TX("tx_cmd with AES hwcrypto\n");
 361                 break;
 362
 363         case WLAN_CIPHER_SUITE_TKIP:
 364                 break;
 365
 366         case WLAN_CIPHER_SUITE_WEP104:
 367                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 368                 fallthrough;
 369         case WLAN_CIPHER_SUITE_WEP40:
 370                 tx_cmd->sec_ctl |=
 371                     TX_CMD_SEC_WEP | (info->control.hw_key->
 372                                       hw_key_idx & TX_CMD_SEC_MSK) <<
 373                     TX_CMD_SEC_SHIFT;
 374
 375                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 376
 377                 D_TX("Configuring packet for WEP encryption " "with key %d\n",
 378                      info->control.hw_key->hw_key_idx);
 379                 break;
 380
 381         default:
 382                 IL_ERR("Unknown encode cipher %x\n", keyinfo->cipher);
 383                 break;
 384         }
 385 }
 386
 387 /*
 388  * handle build C_TX command notification.
 389  */
 390 static void
 391 il3945_build_tx_cmd_basic(struct il_priv *il, struct il_device_cmd *cmd,
 392                           struct ieee80211_tx_info *info,
 393                           struct ieee80211_hdr *hdr, u8 std_id)
 394 {
 395         struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 396         __le32 tx_flags = tx_cmd->tx_flags;
 397         __le16 fc = hdr->frame_control;
 398
 399         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 400         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 401                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 402                 if (ieee80211_is_mgmt(fc))
 403                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 404                 if (ieee80211_is_probe_resp(fc) &&
 405                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 406                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 407         } else {
 408                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 409                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 410         }
 411
 412         tx_cmd->sta_id = std_id;
 413         if (ieee80211_has_morefrags(fc))
 414                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 415
 416         if (ieee80211_is_data_qos(fc)) {
 417                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 418                 tx_cmd->tid_tspec = qc[0] & 0xf;
 419                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 420         } else {
 421                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 422         }
 423
 424         il_tx_cmd_protection(il, info, fc, &tx_flags);
 425
 426         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 427         if (ieee80211_is_mgmt(fc)) {
 428                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 429                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 430                 else
 431                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 432         } else {
 433                 tx_cmd->timeout.pm_frame_timeout = 0;
 434         }
 435
 436         tx_cmd->driver_txop = 0;
 437         tx_cmd->tx_flags = tx_flags;
 438         tx_cmd->next_frame_len = 0;
 439 }
 440
 441 /*
 442  * start C_TX command process
 443  */
 444 static int
 445 il3945_tx_skb(struct il_priv *il,
 446               struct ieee80211_sta *sta,
 447               struct sk_buff *skb)
 448 {
 449         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 450         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 451         struct il3945_tx_cmd *tx_cmd;
 452         struct il_tx_queue *txq = NULL;
 453         struct il_queue *q = NULL;
 454         struct il_device_cmd *out_cmd;
 455         struct il_cmd_meta *out_meta;
 456         dma_addr_t phys_addr;
 457         dma_addr_t txcmd_phys;
 458         int txq_id = skb_get_queue_mapping(skb);
 459         u16 len, idx, hdr_len;
 460         u16 firstlen, secondlen;
 461         u8 sta_id;
 462         u8 tid = 0;
 463         __le16 fc;
 464         u8 wait_write_ptr = 0;
 465         unsigned long flags;
 466
 467         spin_lock_irqsave(&il->lock, flags);
 468         if (il_is_rfkill(il)) {
 469                 D_DROP("Dropping - RF KILL\n");
 470                 goto drop_unlock;
 471         }
 472
 473         if ((ieee80211_get_tx_rate(il->hw, info)->hw_value & 0xFF) ==
 474             IL_INVALID_RATE) {
 475                 IL_ERR("ERROR: No TX rate available.\n");
 476                 goto drop_unlock;
 477         }
 478
 479         fc = hdr->frame_control;
 480
 481 #ifdef CONFIG_IWLEGACY_DEBUG
 482         if (ieee80211_is_auth(fc))
 483                 D_TX("Sending AUTH frame\n");
 484         else if (ieee80211_is_assoc_req(fc))
 485                 D_TX("Sending ASSOC frame\n");
 486         else if (ieee80211_is_reassoc_req(fc))
 487                 D_TX("Sending REASSOC frame\n");
 488 #endif
 489
 490         spin_unlock_irqrestore(&il->lock, flags);
 491
 492         hdr_len = ieee80211_hdrlen(fc);
 493
 494         /* Find idx into station table for destination station */
 495         sta_id = il_sta_id_or_broadcast(il, sta);
 496         if (sta_id == IL_INVALID_STATION) {
 497                 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
 498                 goto drop;
 499         }
 500
 501         D_RATE("station Id %d\n", sta_id);
 502
 503         if (ieee80211_is_data_qos(fc)) {
 504                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 505                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 506                 if (unlikely(tid >= MAX_TID_COUNT))
 507                         goto drop;
 508         }
 509
 510         /* Descriptor for chosen Tx queue */
 511         txq = &il->txq[txq_id];
 512         q = &txq->q;
 513
 514         if ((il_queue_space(q) < q->high_mark))
 515                 goto drop;
 516
 517         spin_lock_irqsave(&il->lock, flags);
 518
 519         idx = il_get_cmd_idx(q, q->write_ptr, 0);
 520
 521         txq->skbs[q->write_ptr] = skb;
 522
 523         /* Init first empty entry in queue's array of Tx/cmd buffers */
 524         out_cmd = txq->cmd[idx];
 525         out_meta = &txq->meta[idx];
 526         tx_cmd = (struct il3945_tx_cmd *)out_cmd->cmd.payload;
 527         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 528         memset(tx_cmd, 0, sizeof(*tx_cmd));
 529
 530         /*
 531          * Set up the Tx-command (not MAC!) header.
 532          * Store the chosen Tx queue and TFD idx within the sequence field;
 533          * after Tx, uCode's Tx response will return this value so driver can
 534          * locate the frame within the tx queue and do post-tx processing.
 535          */
 536         out_cmd->hdr.cmd = C_TX;
 537         out_cmd->hdr.sequence =
 538             cpu_to_le16((u16)
 539                         (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
 540
 541         /* Copy MAC header from skb into command buffer */
 542         memcpy(tx_cmd->hdr, hdr, hdr_len);
 543
 544         if (info->control.hw_key)
 545                 il3945_build_tx_cmd_hwcrypto(il, info, out_cmd, skb, sta_id);
 546
 547         /* TODO need this for burst mode later on */
 548         il3945_build_tx_cmd_basic(il, out_cmd, info, hdr, sta_id);
 549
 550         il3945_hw_build_tx_cmd_rate(il, out_cmd, info, hdr, sta_id);
 551
 552         /* Total # bytes to be transmitted */
 553         tx_cmd->len = cpu_to_le16((u16) skb->len);
 554
 555         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 556         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 557
 558         /*
 559          * Use the first empty entry in this queue's command buffer array
 560          * to contain the Tx command and MAC header concatenated together
 561          * (payload data will be in another buffer).
 562          * Size of this varies, due to varying MAC header length.
 563          * If end is not dword aligned, we'll have 2 extra bytes at the end
 564          * of the MAC header (device reads on dword boundaries).
 565          * We'll tell device about this padding later.
 566          */
 567         len =
 568             sizeof(struct il3945_tx_cmd) + sizeof(struct il_cmd_header) +
 569             hdr_len;
 570         firstlen = (len + 3) & ~3;
 571
 572         /* Physical address of this Tx command's header (not MAC header!),
 573          * within command buffer array. */
 574         txcmd_phys = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, firstlen,
 575                                     DMA_TO_DEVICE);
 576         if (unlikely(dma_mapping_error(&il->pci_dev->dev, txcmd_phys)))
 577                 goto drop_unlock;
 578
 579         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 580          * if any (802.11 null frames have no payload). */
 581         secondlen = skb->len - hdr_len;
 582         if (secondlen > 0) {
 583                 phys_addr = dma_map_single(&il->pci_dev->dev, skb->data + hdr_len,
 584                                            secondlen, DMA_TO_DEVICE);
 585                 if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr)))
 586                         goto drop_unlock;
 587         }
 588
 589         /* Add buffer containing Tx command and MAC(!) header to TFD's
 590          * first entry */
 591         il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
 592         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 593         dma_unmap_len_set(out_meta, len, firstlen);
 594         if (secondlen > 0)
 595                 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 0,
 596                                                U32_PAD(secondlen));
 597
 598         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 599                 txq->need_update = 1;
 600         } else {
 601                 wait_write_ptr = 1;
 602                 txq->need_update = 0;
 603         }
 604
 605         il_update_stats(il, true, fc, skb->len);
 606
 607         D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
 608         D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 609         il_print_hex_dump(il, IL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 610         il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr,
 611                           ieee80211_hdrlen(fc));
 612
 613         /* Tell device the write idx *just past* this latest filled TFD */
 614         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
 615         il_txq_update_write_ptr(il, txq);
 616         spin_unlock_irqrestore(&il->lock, flags);
 617
 618         if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
 619                 if (wait_write_ptr) {
 620                         spin_lock_irqsave(&il->lock, flags);
 621                         txq->need_update = 1;
 622                         il_txq_update_write_ptr(il, txq);
 623                         spin_unlock_irqrestore(&il->lock, flags);
 624                 }
 625
 626                 il_stop_queue(il, txq);
 627         }
 628
 629         return 0;
 630
 631 drop_unlock:
 632         spin_unlock_irqrestore(&il->lock, flags);
 633 drop:
 634         return -1;
 635 }
 636
 637 static int
 638 il3945_get_measurement(struct il_priv *il,
 639                        struct ieee80211_measurement_params *params, u8 type)
 640 {
 641         struct il_spectrum_cmd spectrum;
 642         struct il_rx_pkt *pkt;
 643         struct il_host_cmd cmd = {
 644                 .id = C_SPECTRUM_MEASUREMENT,
 645                 .data = (void *)&spectrum,
 646                 .flags = CMD_WANT_SKB,
 647         };
 648         u32 add_time = le64_to_cpu(params->start_time);
 649         int rc;
 650         int spectrum_resp_status;
 651         int duration = le16_to_cpu(params->duration);
 652
 653         if (il_is_associated(il))
 654                 add_time =
 655                     il_usecs_to_beacons(il,
 656                                         le64_to_cpu(params->start_time) -
 657                                         il->_3945.last_tsf,
 658                                         le16_to_cpu(il->timing.beacon_interval));
 659
 660         memset(&spectrum, 0, sizeof(spectrum));
 661
 662         spectrum.channel_count = cpu_to_le16(1);
 663         spectrum.flags =
 664             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 665         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 666         cmd.len = sizeof(spectrum);
 667         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 668
 669         if (il_is_associated(il))
 670                 spectrum.start_time =
 671                     il_add_beacon_time(il, il->_3945.last_beacon_time, add_time,
 672                                        le16_to_cpu(il->timing.beacon_interval));
 673         else
 674                 spectrum.start_time = 0;
 675
 676         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 677         spectrum.channels[0].channel = params->channel;
 678         spectrum.channels[0].type = type;
 679         if (il->active.flags & RXON_FLG_BAND_24G_MSK)
 680                 spectrum.flags |=
 681                     RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
 682                     RXON_FLG_TGG_PROTECT_MSK;
 683
 684         rc = il_send_cmd_sync(il, &cmd);
 685         if (rc)
 686                 return rc;
 687
 688         pkt = (struct il_rx_pkt *)cmd.reply_page;
 689         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 690                 IL_ERR("Bad return from N_RX_ON_ASSOC command\n");
 691                 rc = -EIO;
 692         }
 693
 694         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 695         switch (spectrum_resp_status) {
 696         case 0:         /* Command will be handled */
 697                 if (pkt->u.spectrum.id != 0xff) {
 698                         D_INFO("Replaced existing measurement: %d\n",
 699                                pkt->u.spectrum.id);
 700                         il->measurement_status &= ~MEASUREMENT_READY;
 701                 }
 702                 il->measurement_status |= MEASUREMENT_ACTIVE;
 703                 rc = 0;
 704                 break;
 705
 706         case 1:         /* Command will not be handled */
 707                 rc = -EAGAIN;
 708                 break;
 709         }
 710
 711         il_free_pages(il, cmd.reply_page);
 712
 713         return rc;
 714 }
 715
 716 static void
 717 il3945_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
 718 {
 719         struct il_rx_pkt *pkt = rxb_addr(rxb);
 720         struct il_alive_resp *palive;
 721         struct delayed_work *pwork;
 722
 723         palive = &pkt->u.alive_frame;
 724
 725         D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
 726                palive->is_valid, palive->ver_type, palive->ver_subtype);
 727
 728         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 729                 D_INFO("Initialization Alive received.\n");
 730                 memcpy(&il->card_alive_init, &pkt->u.alive_frame,
 731                        sizeof(struct il_alive_resp));
 732                 pwork = &il->init_alive_start;
 733         } else {
 734                 D_INFO("Runtime Alive received.\n");
 735                 memcpy(&il->card_alive, &pkt->u.alive_frame,
 736                        sizeof(struct il_alive_resp));
 737                 pwork = &il->alive_start;
 738                 il3945_disable_events(il);
 739         }
 740
 741         /* We delay the ALIVE response by 5ms to
 742          * give the HW RF Kill time to activate... */
 743         if (palive->is_valid == UCODE_VALID_OK)
 744                 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
 745         else
 746                 IL_WARN("uCode did not respond OK.\n");
 747 }
 748
 749 static void
 750 il3945_hdl_add_sta(struct il_priv *il, struct il_rx_buf *rxb)
 751 {
 752         struct il_rx_pkt *pkt = rxb_addr(rxb);
 753
 754         D_RX("Received C_ADD_STA: 0x%02X\n", pkt->u.status);
 755 }
 756
 757 static void
 758 il3945_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
 759 {
 760         struct il_rx_pkt *pkt = rxb_addr(rxb);
 761         struct il3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 762 #ifdef CONFIG_IWLEGACY_DEBUG
 763         u8 rate = beacon->beacon_notify_hdr.rate;
 764
 765         D_RX("beacon status %x retries %d iss %d " "tsf %d %d rate %d\n",
 766              le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 767              beacon->beacon_notify_hdr.failure_frame,
 768              le32_to_cpu(beacon->ibss_mgr_status),
 769              le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
 770 #endif
 771
 772         il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 773
 774 }
 775
 776 /* Handle notification from uCode that card's power state is changing
 777  * due to software, hardware, or critical temperature RFKILL */
 778 static void
 779 il3945_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
 780 {
 781         struct il_rx_pkt *pkt = rxb_addr(rxb);
 782         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 783         unsigned long status = il->status;
 784
 785         IL_WARN("Card state received: HW:%s SW:%s\n",
 786                 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 787                 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 788
 789         _il_wr(il, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 790
 791         if (flags & HW_CARD_DISABLED)
 792                 set_bit(S_RFKILL, &il->status);
 793         else
 794                 clear_bit(S_RFKILL, &il->status);
 795
 796         il_scan_cancel(il);
 797
 798         if ((test_bit(S_RFKILL, &status) !=
 799              test_bit(S_RFKILL, &il->status)))
 800                 wiphy_rfkill_set_hw_state(il->hw->wiphy,
 801                                           test_bit(S_RFKILL, &il->status));
 802         else
 803                 wake_up(&il->wait_command_queue);
 804 }
 805
 806 /*
 807  * il3945_setup_handlers - Initialize Rx handler callbacks
 808  *
 809  * Setup the RX handlers for each of the reply types sent from the uCode
 810  * to the host.
 811  *
 812  * This function chains into the hardware specific files for them to setup
 813  * any hardware specific handlers as well.
 814  */
 815 static void
 816 il3945_setup_handlers(struct il_priv *il)
 817 {
 818         il->handlers[N_ALIVE] = il3945_hdl_alive;
 819         il->handlers[C_ADD_STA] = il3945_hdl_add_sta;
 820         il->handlers[N_ERROR] = il_hdl_error;
 821         il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
 822         il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
 823         il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
 824         il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
 825         il->handlers[N_BEACON] = il3945_hdl_beacon;
 826
 827         /*
 828          * The same handler is used for both the REPLY to a discrete
 829          * stats request from the host as well as for the periodic
 830          * stats notifications (after received beacons) from the uCode.
 831          */
 832         il->handlers[C_STATS] = il3945_hdl_c_stats;
 833         il->handlers[N_STATS] = il3945_hdl_stats;
 834
 835         il_setup_rx_scan_handlers(il);
 836         il->handlers[N_CARD_STATE] = il3945_hdl_card_state;
 837
 838         /* Set up hardware specific Rx handlers */
 839         il3945_hw_handler_setup(il);
 840 }
 841
 842 /************************** RX-FUNCTIONS ****************************/
 843 /*
 844  * Rx theory of operation
 845  *
 846  * The host allocates 32 DMA target addresses and passes the host address
 847  * to the firmware at register IL_RFDS_TBL_LOWER + N * RFD_SIZE where N is
 848  * 0 to 31
 849  *
 850  * Rx Queue Indexes
 851  * The host/firmware share two idx registers for managing the Rx buffers.
 852  *
 853  * The READ idx maps to the first position that the firmware may be writing
 854  * to -- the driver can read up to (but not including) this position and get
 855  * good data.
 856  * The READ idx is managed by the firmware once the card is enabled.
 857  *
 858  * The WRITE idx maps to the last position the driver has read from -- the
 859  * position preceding WRITE is the last slot the firmware can place a packet.
 860  *
 861  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 862  * WRITE = READ.
 863  *
 864  * During initialization, the host sets up the READ queue position to the first
 865  * IDX position, and WRITE to the last (READ - 1 wrapped)
 866  *
 867  * When the firmware places a packet in a buffer, it will advance the READ idx
 868  * and fire the RX interrupt.  The driver can then query the READ idx and
 869  * process as many packets as possible, moving the WRITE idx forward as it
 870  * resets the Rx queue buffers with new memory.
 871  *
 872  * The management in the driver is as follows:
 873  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 874  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 875  *   to replenish the iwl->rxq->rx_free.
 876  * + In il3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 877  *   iwl->rxq is replenished and the READ IDX is updated (updating the
 878  *   'processed' and 'read' driver idxes as well)
 879  * + A received packet is processed and handed to the kernel network stack,
 880  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
 881  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 882  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 883  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
 884  *   were enough free buffers and RX_STALLED is set it is cleared.
 885  *
 886  *
 887  * Driver sequence:
 888  *
 889  * il3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 890  *                            il3945_rx_queue_restock
 891  * il3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 892  *                            queue, updates firmware pointers, and updates
 893  *                            the WRITE idx.  If insufficient rx_free buffers
 894  *                            are available, schedules il3945_rx_replenish
 895  *
 896  * -- enable interrupts --
 897  * ISR - il3945_rx()         Detach il_rx_bufs from pool up to the
 898  *                            READ IDX, detaching the SKB from the pool.
 899  *                            Moves the packet buffer from queue to rx_used.
 900  *                            Calls il3945_rx_queue_restock to refill any empty
 901  *                            slots.
 902  * ...
 903  *
 904  */
 905
 906 /*
 907  * il3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 908  */
 909 static inline __le32
 910 il3945_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
 911 {
 912         return cpu_to_le32((u32) dma_addr);
 913 }
 914
 915 /*
 916  * il3945_rx_queue_restock - refill RX queue from pre-allocated pool
 917  *
 918  * If there are slots in the RX queue that need to be restocked,
 919  * and we have free pre-allocated buffers, fill the ranks as much
 920  * as we can, pulling from rx_free.
 921  *
 922  * This moves the 'write' idx forward to catch up with 'processed', and
 923  * also updates the memory address in the firmware to reference the new
 924  * target buffer.
 925  */
 926 static void
 927 il3945_rx_queue_restock(struct il_priv *il)
 928 {
 929         struct il_rx_queue *rxq = &il->rxq;
 930         struct list_head *element;
 931         struct il_rx_buf *rxb;
 932         unsigned long flags;
 933
 934         spin_lock_irqsave(&rxq->lock, flags);
 935         while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
 936                 /* Get next free Rx buffer, remove from free list */
 937                 element = rxq->rx_free.next;
 938                 rxb = list_entry(element, struct il_rx_buf, list);
 939                 list_del(element);
 940
 941                 /* Point to Rx buffer via next RBD in circular buffer */
 942                 rxq->bd[rxq->write] =
 943                     il3945_dma_addr2rbd_ptr(il, rxb->page_dma);
 944                 rxq->queue[rxq->write] = rxb;
 945                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
 946                 rxq->free_count--;
 947         }
 948         spin_unlock_irqrestore(&rxq->lock, flags);
 949         /* If the pre-allocated buffer pool is dropping low, schedule to
 950          * refill it */
 951         if (rxq->free_count <= RX_LOW_WATERMARK)
 952                 queue_work(il->workqueue, &il->rx_replenish);
 953
 954         /* If we've added more space for the firmware to place data, tell it.
 955          * Increment device's write pointer in multiples of 8. */
 956         if (rxq->write_actual != (rxq->write & ~0x7) ||
 957             abs(rxq->write - rxq->read) > 7) {
 958                 spin_lock_irqsave(&rxq->lock, flags);
 959                 rxq->need_update = 1;
 960                 spin_unlock_irqrestore(&rxq->lock, flags);
 961                 il_rx_queue_update_write_ptr(il, rxq);
 962         }
 963 }
 964
 965 /*
 966  * il3945_rx_replenish - Move all used packet from rx_used to rx_free
 967  *
 968  * When moving to rx_free an SKB is allocated for the slot.
 969  *
 970  * Also restock the Rx queue via il3945_rx_queue_restock.
 971  * This is called as a scheduled work item (except for during initialization)
 972  */
 973 static void
 974 il3945_rx_allocate(struct il_priv *il, gfp_t priority)
 975 {
 976         struct il_rx_queue *rxq = &il->rxq;
 977         struct list_head *element;
 978         struct il_rx_buf *rxb;
 979         struct page *page;
 980         dma_addr_t page_dma;
 981         unsigned long flags;
 982         gfp_t gfp_mask = priority;
 983
 984         while (1) {
 985                 spin_lock_irqsave(&rxq->lock, flags);
 986                 if (list_empty(&rxq->rx_used)) {
 987                         spin_unlock_irqrestore(&rxq->lock, flags);
 988                         return;
 989                 }
 990                 spin_unlock_irqrestore(&rxq->lock, flags);
 991
 992                 if (rxq->free_count > RX_LOW_WATERMARK)
 993                         gfp_mask |= __GFP_NOWARN;
 994
 995                 if (il->hw_params.rx_page_order > 0)
 996                         gfp_mask |= __GFP_COMP;
 997
 998                 /* Alloc a new receive buffer */
 999                 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
1000                 if (!page) {
1001                         if (net_ratelimit())
1002                                 D_INFO("Failed to allocate SKB buffer.\n");
1003                         if (rxq->free_count <= RX_LOW_WATERMARK &&
1004                             net_ratelimit())
1005                                 IL_ERR("Failed to allocate SKB buffer with %0x."
1006                                        "Only %u free buffers remaining.\n",
1007                                        priority, rxq->free_count);
1008                         /* We don't reschedule replenish work here -- we will
1009                          * call the restock method and if it still needs
1010                          * more buffers it will schedule replenish */
1011                         break;
1012                 }
1013
1014                 /* Get physical address of RB/SKB */
1015                 page_dma =
1016                     dma_map_page(&il->pci_dev->dev, page, 0,
1017                                  PAGE_SIZE << il->hw_params.rx_page_order,
1018                                  DMA_FROM_DEVICE);
1019
1020                 if (unlikely(dma_mapping_error(&il->pci_dev->dev, page_dma))) {
1021                         __free_pages(page, il->hw_params.rx_page_order);
1022                         break;
1023                 }
1024
1025                 spin_lock_irqsave(&rxq->lock, flags);
1026
1027                 if (list_empty(&rxq->rx_used)) {
1028                         spin_unlock_irqrestore(&rxq->lock, flags);
1029                         dma_unmap_page(&il->pci_dev->dev, page_dma,
1030                                        PAGE_SIZE << il->hw_params.rx_page_order,
1031                                        DMA_FROM_DEVICE);
1032                         __free_pages(page, il->hw_params.rx_page_order);
1033                         return;
1034                 }
1035
1036                 element = rxq->rx_used.next;
1037                 rxb = list_entry(element, struct il_rx_buf, list);
1038                 list_del(element);
1039
1040                 rxb->page = page;
1041                 rxb->page_dma = page_dma;
1042                 list_add_tail(&rxb->list, &rxq->rx_free);
1043                 rxq->free_count++;
1044                 il->alloc_rxb_page++;
1045
1046                 spin_unlock_irqrestore(&rxq->lock, flags);
1047         }
1048 }
1049
1050 void
1051 il3945_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
1052 {
1053         unsigned long flags;
1054         int i;
1055         spin_lock_irqsave(&rxq->lock, flags);
1056         INIT_LIST_HEAD(&rxq->rx_free);
1057         INIT_LIST_HEAD(&rxq->rx_used);
1058         /* Fill the rx_used queue with _all_ of the Rx buffers */
1059         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1060                 /* In the reset function, these buffers may have been allocated
1061                  * to an SKB, so we need to unmap and free potential storage */
1062                 if (rxq->pool[i].page != NULL) {
1063                         dma_unmap_page(&il->pci_dev->dev,
1064                                        rxq->pool[i].page_dma,
1065                                        PAGE_SIZE << il->hw_params.rx_page_order,
1066                                        DMA_FROM_DEVICE);
1067                         __il_free_pages(il, rxq->pool[i].page);
1068                         rxq->pool[i].page = NULL;
1069                 }
1070                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1071         }
1072
1073         /* Set us so that we have processed and used all buffers, but have
1074          * not restocked the Rx queue with fresh buffers */
1075         rxq->read = rxq->write = 0;
1076         rxq->write_actual = 0;
1077         rxq->free_count = 0;
1078         spin_unlock_irqrestore(&rxq->lock, flags);
1079 }
1080
1081 void
1082 il3945_rx_replenish(void *data)
1083 {
1084         struct il_priv *il = data;
1085         unsigned long flags;
1086
1087         il3945_rx_allocate(il, GFP_KERNEL);
1088
1089         spin_lock_irqsave(&il->lock, flags);
1090         il3945_rx_queue_restock(il);
1091         spin_unlock_irqrestore(&il->lock, flags);
1092 }
1093
1094 static void
1095 il3945_rx_replenish_now(struct il_priv *il)
1096 {
1097         il3945_rx_allocate(il, GFP_ATOMIC);
1098
1099         il3945_rx_queue_restock(il);
1100 }
1101
1102 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1103  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1104  * This free routine walks the list of POOL entries and if SKB is set to
1105  * non NULL it is unmapped and freed
1106  */
1107 static void
1108 il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
1109 {
1110         int i;
1111         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1112                 if (rxq->pool[i].page != NULL) {
1113                         dma_unmap_page(&il->pci_dev->dev,
1114                                        rxq->pool[i].page_dma,
1115                                        PAGE_SIZE << il->hw_params.rx_page_order,
1116                                        DMA_FROM_DEVICE);
1117                         __il_free_pages(il, rxq->pool[i].page);
1118                         rxq->pool[i].page = NULL;
1119                 }
1120         }
1121
1122         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1123                           rxq->bd_dma);
1124         dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
1125                           rxq->rb_stts, rxq->rb_stts_dma);
1126         rxq->bd = NULL;
1127         rxq->rb_stts = NULL;
1128 }
1129
1130 /* Convert linear signal-to-noise ratio into dB */
1131 static u8 ratio2dB[100] = {
1132 /*       0   1   2   3   4   5   6   7   8   9 */
1133         0, 0, 6, 10, 12, 14, 16, 17, 18, 19,    /* 00 - 09 */
1134         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1135         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1136         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1137         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1138         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1139         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1140         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1141         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1142         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1143 };
1144
1145 /* Calculates a relative dB value from a ratio of linear
1146  *   (i.e. not dB) signal levels.
1147  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1148 int
1149 il3945_calc_db_from_ratio(int sig_ratio)
1150 {
1151         /* 1000:1 or higher just report as 60 dB */
1152         if (sig_ratio >= 1000)
1153                 return 60;
1154
1155         /* 100:1 or higher, divide by 10 and use table,
1156          *   add 20 dB to make up for divide by 10 */
1157         if (sig_ratio >= 100)
1158                 return 20 + (int)ratio2dB[sig_ratio / 10];
1159
1160         /* We shouldn't see this */
1161         if (sig_ratio < 1)
1162                 return 0;
1163
1164         /* Use table for ratios 1:1 - 99:1 */
1165         return (int)ratio2dB[sig_ratio];
1166 }
1167
1168 /*
1169  * il3945_rx_handle - Main entry function for receiving responses from uCode
1170  *
1171  * Uses the il->handlers callback function array to invoke
1172  * the appropriate handlers, including command responses,
1173  * frame-received notifications, and other notifications.
1174  */
1175 static void
1176 il3945_rx_handle(struct il_priv *il)
1177 {
1178         struct il_rx_buf *rxb;
1179         struct il_rx_pkt *pkt;
1180         struct il_rx_queue *rxq = &il->rxq;
1181         u32 r, i;
1182         int reclaim;
1183         unsigned long flags;
1184         u8 fill_rx = 0;
1185         u32 count = 8;
1186         int total_empty = 0;
1187
1188         /* uCode's read idx (stored in shared DRAM) indicates the last Rx
1189          * buffer that the driver may process (last buffer filled by ucode). */
1190         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1191         i = rxq->read;
1192
1193         /* calculate total frames need to be restock after handling RX */
1194         total_empty = r - rxq->write_actual;
1195         if (total_empty < 0)
1196                 total_empty += RX_QUEUE_SIZE;
1197
1198         if (total_empty > (RX_QUEUE_SIZE / 2))
1199                 fill_rx = 1;
1200         /* Rx interrupt, but nothing sent from uCode */
1201         if (i == r)
1202                 D_RX("r = %d, i = %d\n", r, i);
1203
1204         while (i != r) {
1205                 rxb = rxq->queue[i];
1206
1207                 /* If an RXB doesn't have a Rx queue slot associated with it,
1208                  * then a bug has been introduced in the queue refilling
1209                  * routines -- catch it here */
1210                 BUG_ON(rxb == NULL);
1211
1212                 rxq->queue[i] = NULL;
1213
1214                 dma_unmap_page(&il->pci_dev->dev, rxb->page_dma,
1215                                PAGE_SIZE << il->hw_params.rx_page_order,
1216                                DMA_FROM_DEVICE);
1217                 pkt = rxb_addr(rxb);
1218                 reclaim = il_need_reclaim(il, pkt);
1219
1220                 /* Based on type of command response or notification,
1221                  *   handle those that need handling via function in
1222                  *   handlers table.  See il3945_setup_handlers() */
1223                 if (il->handlers[pkt->hdr.cmd]) {
1224                         D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
1225                              il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1226                         il->isr_stats.handlers[pkt->hdr.cmd]++;
1227                         il->handlers[pkt->hdr.cmd] (il, rxb);
1228                 } else {
1229                         /* No handling needed */
1230                         D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
1231                              i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1232                 }
1233
1234                 /*
1235                  * XXX: After here, we should always check rxb->page
1236                  * against NULL before touching it or its virtual
1237                  * memory (pkt). Because some handler might have
1238                  * already taken or freed the pages.
1239                  */
1240
1241                 if (reclaim) {
1242                         /* Invoke any callbacks, transfer the buffer to caller,
1243                          * and fire off the (possibly) blocking il_send_cmd()
1244                          * as we reclaim the driver command queue */
1245                         if (rxb->page)
1246                                 il_tx_cmd_complete(il, rxb);
1247                         else
1248                                 IL_WARN("Claim null rxb?\n");
1249                 }
1250
1251                 /* Reuse the page if possible. For notification packets and
1252                  * SKBs that fail to Rx correctly, add them back into the
1253                  * rx_free list for reuse later. */
1254                 spin_lock_irqsave(&rxq->lock, flags);
1255                 if (rxb->page != NULL) {
1256                         rxb->page_dma =
1257                             dma_map_page(&il->pci_dev->dev, rxb->page, 0,
1258                                          PAGE_SIZE << il->hw_params.rx_page_order,
1259                                          DMA_FROM_DEVICE);
1260                         if (unlikely(dma_mapping_error(&il->pci_dev->dev,
1261                                                        rxb->page_dma))) {
1262                                 __il_free_pages(il, rxb->page);
1263                                 rxb->page = NULL;
1264                                 list_add_tail(&rxb->list, &rxq->rx_used);
1265                         } else {
1266                                 list_add_tail(&rxb->list, &rxq->rx_free);
1267                                 rxq->free_count++;
1268                         }
1269                 } else
1270                         list_add_tail(&rxb->list, &rxq->rx_used);
1271
1272                 spin_unlock_irqrestore(&rxq->lock, flags);
1273
1274                 i = (i + 1) & RX_QUEUE_MASK;
1275                 /* If there are a lot of unused frames,
1276                  * restock the Rx queue so ucode won't assert. */
1277                 if (fill_rx) {
1278                         count++;
1279                         if (count >= 8) {
1280                                 rxq->read = i;
1281                                 il3945_rx_replenish_now(il);
1282                                 count = 0;
1283                         }
1284                 }
1285         }
1286
1287         /* Backtrack one entry */
1288         rxq->read = i;
1289         if (fill_rx)
1290                 il3945_rx_replenish_now(il);
1291         else
1292                 il3945_rx_queue_restock(il);
1293 }
1294
1295 /* call this function to flush any scheduled tasklet */
1296 static inline void
1297 il3945_synchronize_irq(struct il_priv *il)
1298 {
1299         /* wait to make sure we flush pending tasklet */
1300         synchronize_irq(il->pci_dev->irq);
1301         tasklet_kill(&il->irq_tasklet);
1302 }
1303
1304 static const char *
1305 il3945_desc_lookup(int i)
1306 {
1307         switch (i) {
1308         case 1:
1309                 return "FAIL";
1310         case 2:
1311                 return "BAD_PARAM";
1312         case 3:
1313                 return "BAD_CHECKSUM";
1314         case 4:
1315                 return "NMI_INTERRUPT";
1316         case 5:
1317                 return "SYSASSERT";
1318         case 6:
1319                 return "FATAL_ERROR";
1320         }
1321
1322         return "UNKNOWN";
1323 }
1324
1325 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1326 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1327
1328 void
1329 il3945_dump_nic_error_log(struct il_priv *il)
1330 {
1331         u32 i;
1332         u32 desc, time, count, base, data1;
1333         u32 blink1, blink2, ilink1, ilink2;
1334
1335         base = le32_to_cpu(il->card_alive.error_event_table_ptr);
1336
1337         if (!il3945_hw_valid_rtc_data_addr(base)) {
1338                 IL_ERR("Not valid error log pointer 0x%08X\n", base);
1339                 return;
1340         }
1341
1342         count = il_read_targ_mem(il, base);
1343
1344         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1345                 IL_ERR("Start IWL Error Log Dump:\n");
1346                 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
1347         }
1348
1349         IL_ERR("Desc       Time       asrtPC  blink2 "
1350                "ilink1  nmiPC   Line\n");
1351         for (i = ERROR_START_OFFSET;
1352              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1353              i += ERROR_ELEM_SIZE) {
1354                 desc = il_read_targ_mem(il, base + i);
1355                 time = il_read_targ_mem(il, base + i + 1 * sizeof(u32));
1356                 blink1 = il_read_targ_mem(il, base + i + 2 * sizeof(u32));
1357                 blink2 = il_read_targ_mem(il, base + i + 3 * sizeof(u32));
1358                 ilink1 = il_read_targ_mem(il, base + i + 4 * sizeof(u32));
1359                 ilink2 = il_read_targ_mem(il, base + i + 5 * sizeof(u32));
1360                 data1 = il_read_targ_mem(il, base + i + 6 * sizeof(u32));
1361
1362                 IL_ERR("%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1363                        il3945_desc_lookup(desc), desc, time, blink1, blink2,
1364                        ilink1, ilink2, data1);
1365         }
1366 }
1367
1368 static void
1369 il3945_irq_tasklet(struct tasklet_struct *t)
1370 {
1371         struct il_priv *il = from_tasklet(il, t, irq_tasklet);
1372         u32 inta, handled = 0;
1373         u32 inta_fh;
1374         unsigned long flags;
1375 #ifdef CONFIG_IWLEGACY_DEBUG
1376         u32 inta_mask;
1377 #endif
1378
1379         spin_lock_irqsave(&il->lock, flags);
1380
1381         /* Ack/clear/reset pending uCode interrupts.
1382          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1383          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1384         inta = _il_rd(il, CSR_INT);
1385         _il_wr(il, CSR_INT, inta);
1386
1387         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1388          * Any new interrupts that happen after this, either while we're
1389          * in this tasklet, or later, will show up in next ISR/tasklet. */
1390         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1391         _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
1392
1393 #ifdef CONFIG_IWLEGACY_DEBUG
1394         if (il_get_debug_level(il) & IL_DL_ISR) {
1395                 /* just for debug */
1396                 inta_mask = _il_rd(il, CSR_INT_MASK);
1397                 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
1398                       inta_mask, inta_fh);
1399         }
1400 #endif
1401
1402         spin_unlock_irqrestore(&il->lock, flags);
1403
1404         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1405          * atomic, make sure that inta covers all the interrupts that
1406          * we've discovered, even if FH interrupt came in just after
1407          * reading CSR_INT. */
1408         if (inta_fh & CSR39_FH_INT_RX_MASK)
1409                 inta |= CSR_INT_BIT_FH_RX;
1410         if (inta_fh & CSR39_FH_INT_TX_MASK)
1411                 inta |= CSR_INT_BIT_FH_TX;
1412
1413         /* Now service all interrupt bits discovered above. */
1414         if (inta & CSR_INT_BIT_HW_ERR) {
1415                 IL_ERR("Hardware error detected.  Restarting.\n");
1416
1417                 /* Tell the device to stop sending interrupts */
1418                 il_disable_interrupts(il);
1419
1420                 il->isr_stats.hw++;
1421                 il_irq_handle_error(il);
1422
1423                 handled |= CSR_INT_BIT_HW_ERR;
1424
1425                 return;
1426         }
1427 #ifdef CONFIG_IWLEGACY_DEBUG
1428         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1429                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1430                 if (inta & CSR_INT_BIT_SCD) {
1431                         D_ISR("Scheduler finished to transmit "
1432                               "the frame/frames.\n");
1433                         il->isr_stats.sch++;
1434                 }
1435
1436                 /* Alive notification via Rx interrupt will do the real work */
1437                 if (inta & CSR_INT_BIT_ALIVE) {
1438                         D_ISR("Alive interrupt\n");
1439                         il->isr_stats.alive++;
1440                 }
1441         }
1442 #endif
1443         /* Safely ignore these bits for debug checks below */
1444         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1445
1446         /* Error detected by uCode */
1447         if (inta & CSR_INT_BIT_SW_ERR) {
1448                 IL_ERR("Microcode SW error detected. " "Restarting 0x%X.\n",
1449                        inta);
1450                 il->isr_stats.sw++;
1451                 il_irq_handle_error(il);
1452                 handled |= CSR_INT_BIT_SW_ERR;
1453         }
1454
1455         /* uCode wakes up after power-down sleep */
1456         if (inta & CSR_INT_BIT_WAKEUP) {
1457                 D_ISR("Wakeup interrupt\n");
1458                 il_rx_queue_update_write_ptr(il, &il->rxq);
1459
1460                 spin_lock_irqsave(&il->lock, flags);
1461                 il_txq_update_write_ptr(il, &il->txq[0]);
1462                 il_txq_update_write_ptr(il, &il->txq[1]);
1463                 il_txq_update_write_ptr(il, &il->txq[2]);
1464                 il_txq_update_write_ptr(il, &il->txq[3]);
1465                 il_txq_update_write_ptr(il, &il->txq[4]);
1466                 spin_unlock_irqrestore(&il->lock, flags);
1467
1468                 il->isr_stats.wakeup++;
1469                 handled |= CSR_INT_BIT_WAKEUP;
1470         }
1471
1472         /* All uCode command responses, including Tx command responses,
1473          * Rx "responses" (frame-received notification), and other
1474          * notifications from uCode come through here*/
1475         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1476                 il3945_rx_handle(il);
1477                 il->isr_stats.rx++;
1478                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1479         }
1480
1481         if (inta & CSR_INT_BIT_FH_TX) {
1482                 D_ISR("Tx interrupt\n");
1483                 il->isr_stats.tx++;
1484
1485                 _il_wr(il, CSR_FH_INT_STATUS, (1 << 6));
1486                 il_wr(il, FH39_TCSR_CREDIT(FH39_SRVC_CHNL), 0x0);
1487                 handled |= CSR_INT_BIT_FH_TX;
1488         }
1489
1490         if (inta & ~handled) {
1491                 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1492                 il->isr_stats.unhandled++;
1493         }
1494
1495         if (inta & ~il->inta_mask) {
1496                 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
1497                         inta & ~il->inta_mask);
1498                 IL_WARN("   with inta_fh = 0x%08x\n", inta_fh);
1499         }
1500
1501         /* Re-enable all interrupts */
1502         /* only Re-enable if disabled by irq */
1503         if (test_bit(S_INT_ENABLED, &il->status))
1504                 il_enable_interrupts(il);
1505
1506 #ifdef CONFIG_IWLEGACY_DEBUG
1507         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1508                 inta = _il_rd(il, CSR_INT);
1509                 inta_mask = _il_rd(il, CSR_INT_MASK);
1510                 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1511                 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1512                       "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1513         }
1514 #endif
1515 }
1516
1517 static int
1518 il3945_get_channels_for_scan(struct il_priv *il, enum nl80211_band band,
1519                              u8 is_active, u8 n_probes,
1520                              struct il3945_scan_channel *scan_ch,
1521                              struct ieee80211_vif *vif)
1522 {
1523         struct ieee80211_channel *chan;
1524         const struct ieee80211_supported_band *sband;
1525         const struct il_channel_info *ch_info;
1526         u16 passive_dwell = 0;
1527         u16 active_dwell = 0;
1528         int added, i;
1529
1530         sband = il_get_hw_mode(il, band);
1531         if (!sband)
1532                 return 0;
1533
1534         active_dwell = il_get_active_dwell_time(il, band, n_probes);
1535         passive_dwell = il_get_passive_dwell_time(il, band, vif);
1536
1537         if (passive_dwell <= active_dwell)
1538                 passive_dwell = active_dwell + 1;
1539
1540         for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
1541                 chan = il->scan_request->channels[i];
1542
1543                 if (chan->band != band)
1544                         continue;
1545
1546                 scan_ch->channel = chan->hw_value;
1547
1548                 ch_info = il_get_channel_info(il, band, scan_ch->channel);
1549                 if (!il_is_channel_valid(ch_info)) {
1550                         D_SCAN("Channel %d is INVALID for this band.\n",
1551                                scan_ch->channel);
1552                         continue;
1553                 }
1554
1555                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1556                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1557                 /* If passive , set up for auto-switch
1558                  *  and use long active_dwell time.
1559                  */
1560                 if (!is_active || il_is_channel_passive(ch_info) ||
1561                     (chan->flags & IEEE80211_CHAN_NO_IR)) {
1562                         scan_ch->type = 0;      /* passive */
1563                         if (IL_UCODE_API(il->ucode_ver) == 1)
1564                                 scan_ch->active_dwell =
1565                                     cpu_to_le16(passive_dwell - 1);
1566                 } else {
1567                         scan_ch->type = 1;      /* active */
1568                 }
1569
1570                 /* Set direct probe bits. These may be used both for active
1571                  * scan channels (probes gets sent right away),
1572                  * or for passive channels (probes get se sent only after
1573                  * hearing clear Rx packet).*/
1574                 if (IL_UCODE_API(il->ucode_ver) >= 2) {
1575                         if (n_probes)
1576                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1577                 } else {
1578                         /* uCode v1 does not allow setting direct probe bits on
1579                          * passive channel. */
1580                         if ((scan_ch->type & 1) && n_probes)
1581                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1582                 }
1583
1584                 /* Set txpower levels to defaults */
1585                 scan_ch->tpc.dsp_atten = 110;
1586                 /* scan_pwr_info->tpc.dsp_atten; */
1587
1588                 /*scan_pwr_info->tpc.tx_gain; */
1589                 if (band == NL80211_BAND_5GHZ)
1590                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1591                 else {
1592                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1593                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1594                          * power level:
1595                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1596                          */
1597                 }
1598
1599                 D_SCAN("Scanning %d [%s %d]\n", scan_ch->channel,
1600                        (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1601                        (scan_ch->type & 1) ? active_dwell : passive_dwell);
1602
1603                 scan_ch++;
1604                 added++;
1605         }
1606
1607         D_SCAN("total channels to scan %d\n", added);
1608         return added;
1609 }
1610
1611 static void
1612 il3945_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
1613 {
1614         int i;
1615
1616         for (i = 0; i < RATE_COUNT_LEGACY; i++) {
1617                 rates[i].bitrate = il3945_rates[i].ieee * 5;
1618                 rates[i].hw_value = i;  /* Rate scaling will work on idxes */
1619                 rates[i].hw_value_short = i;
1620                 rates[i].flags = 0;
1621                 if (i > IL39_LAST_OFDM_RATE || i < IL_FIRST_OFDM_RATE) {
1622                         /*
1623                          * If CCK != 1M then set short preamble rate flag.
1624                          */
1625                         rates[i].flags |=
1626                             (il3945_rates[i].plcp ==
1627                              10) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1628                 }
1629         }
1630 }
1631
1632 /******************************************************************************
1633  *
1634  * uCode download functions
1635  *
1636  ******************************************************************************/
1637
1638 static void
1639 il3945_dealloc_ucode_pci(struct il_priv *il)
1640 {
1641         il_free_fw_desc(il->pci_dev, &il->ucode_code);
1642         il_free_fw_desc(il->pci_dev, &il->ucode_data);
1643         il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
1644         il_free_fw_desc(il->pci_dev, &il->ucode_init);
1645         il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
1646         il_free_fw_desc(il->pci_dev, &il->ucode_boot);
1647 }
1648
1649 /*
1650  * il3945_verify_inst_full - verify runtime uCode image in card vs. host,
1651  *     looking at all data.
1652  */
1653 static int
1654 il3945_verify_inst_full(struct il_priv *il, __le32 * image, u32 len)
1655 {
1656         u32 val;
1657         u32 save_len = len;
1658         int rc = 0;
1659         u32 errcnt;
1660
1661         D_INFO("ucode inst image size is %u\n", len);
1662
1663         il_wr(il, HBUS_TARG_MEM_RADDR, IL39_RTC_INST_LOWER_BOUND);
1664
1665         errcnt = 0;
1666         for (; len > 0; len -= sizeof(u32), image++) {
1667                 /* read data comes through single port, auto-incr addr */
1668                 /* NOTE: Use the debugless read so we don't flood kernel log
1669                  * if IL_DL_IO is set */
1670                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1671                 if (val != le32_to_cpu(*image)) {
1672                         IL_ERR("uCode INST section is invalid at "
1673                                "offset 0x%x, is 0x%x, s/b 0x%x\n",
1674                                save_len - len, val, le32_to_cpu(*image));
1675                         rc = -EIO;
1676                         errcnt++;
1677                         if (errcnt >= 20)
1678                                 break;
1679                 }
1680         }
1681
1682         if (!errcnt)
1683                 D_INFO("ucode image in INSTRUCTION memory is good\n");
1684
1685         return rc;
1686 }
1687
1688 /*
1689  * il3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1690  *   using sample data 100 bytes apart.  If these sample points are good,
1691  *   it's a pretty good bet that everything between them is good, too.
1692  */
1693 static int
1694 il3945_verify_inst_sparse(struct il_priv *il, __le32 * image, u32 len)
1695 {
1696         u32 val;
1697         int rc = 0;
1698         u32 errcnt = 0;
1699         u32 i;
1700
1701         D_INFO("ucode inst image size is %u\n", len);
1702
1703         for (i = 0; i < len; i += 100, image += 100 / sizeof(u32)) {
1704                 /* read data comes through single port, auto-incr addr */
1705                 /* NOTE: Use the debugless read so we don't flood kernel log
1706                  * if IL_DL_IO is set */
1707                 il_wr(il, HBUS_TARG_MEM_RADDR, i + IL39_RTC_INST_LOWER_BOUND);
1708                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1709                 if (val != le32_to_cpu(*image)) {
1710 #if 0                           /* Enable this if you want to see details */
1711                         IL_ERR("uCode INST section is invalid at "
1712                                "offset 0x%x, is 0x%x, s/b 0x%x\n", i, val,
1713                                *image);
1714 #endif
1715                         rc = -EIO;
1716                         errcnt++;
1717                         if (errcnt >= 3)
1718                                 break;
1719                 }
1720         }
1721
1722         return rc;
1723 }
1724
1725 /*
1726  * il3945_verify_ucode - determine which instruction image is in SRAM,
1727  *    and verify its contents
1728  */
1729 static int
1730 il3945_verify_ucode(struct il_priv *il)
1731 {
1732         __le32 *image;
1733         u32 len;
1734         int rc = 0;
1735
1736         /* Try bootstrap */
1737         image = (__le32 *) il->ucode_boot.v_addr;
1738         len = il->ucode_boot.len;
1739         rc = il3945_verify_inst_sparse(il, image, len);
1740         if (rc == 0) {
1741                 D_INFO("Bootstrap uCode is good in inst SRAM\n");
1742                 return 0;
1743         }
1744
1745         /* Try initialize */
1746         image = (__le32 *) il->ucode_init.v_addr;
1747         len = il->ucode_init.len;
1748         rc = il3945_verify_inst_sparse(il, image, len);
1749         if (rc == 0) {
1750                 D_INFO("Initialize uCode is good in inst SRAM\n");
1751                 return 0;
1752         }
1753
1754         /* Try runtime/protocol */
1755         image = (__le32 *) il->ucode_code.v_addr;
1756         len = il->ucode_code.len;
1757         rc = il3945_verify_inst_sparse(il, image, len);
1758         if (rc == 0) {
1759                 D_INFO("Runtime uCode is good in inst SRAM\n");
1760                 return 0;
1761         }
1762
1763         IL_ERR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1764
1765         /* Since nothing seems to match, show first several data entries in
1766          * instruction SRAM, so maybe visual inspection will give a clue.
1767          * Selection of bootstrap image (vs. other images) is arbitrary. */
1768         image = (__le32 *) il->ucode_boot.v_addr;
1769         len = il->ucode_boot.len;
1770         rc = il3945_verify_inst_full(il, image, len);
1771
1772         return rc;
1773 }
1774
1775 static void
1776 il3945_nic_start(struct il_priv *il)
1777 {
1778         /* Remove all resets to allow NIC to operate */
1779         _il_wr(il, CSR_RESET, 0);
1780 }
1781
1782 #define IL3945_UCODE_GET(item)                                          \
1783 static u32 il3945_ucode_get_##item(const struct il_ucode_header *ucode)\
1784 {                                                                       \
1785         return le32_to_cpu(ucode->v1.item);                             \
1786 }
1787
1788 static u32
1789 il3945_ucode_get_header_size(u32 api_ver)
1790 {
1791         return 24;
1792 }
1793
1794 static u8 *
1795 il3945_ucode_get_data(const struct il_ucode_header *ucode)
1796 {
1797         return (u8 *) ucode->v1.data;
1798 }
1799
1800 IL3945_UCODE_GET(inst_size);
1801 IL3945_UCODE_GET(data_size);
1802 IL3945_UCODE_GET(init_size);
1803 IL3945_UCODE_GET(init_data_size);
1804 IL3945_UCODE_GET(boot_size);
1805
1806 /*
1807  * il3945_read_ucode - Read uCode images from disk file.
1808  *
1809  * Copy into buffers for card to fetch via bus-mastering
1810  */
1811 static int
1812 il3945_read_ucode(struct il_priv *il)
1813 {
1814         const struct il_ucode_header *ucode;
1815         int ret = -EINVAL, idx;
1816         const struct firmware *ucode_raw;
1817         /* firmware file name contains uCode/driver compatibility version */
1818         const char *name_pre = il->cfg->fw_name_pre;
1819         const unsigned int api_max = il->cfg->ucode_api_max;
1820         const unsigned int api_min = il->cfg->ucode_api_min;
1821         char buf[25];
1822         u8 *src;
1823         size_t len;
1824         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1825
1826         /* Ask kernel firmware_class module to get the boot firmware off disk.
1827          * request_firmware() is synchronous, file is in memory on return. */
1828         for (idx = api_max; idx >= api_min; idx--) {
1829                 sprintf(buf, "%s%u%s", name_pre, idx, ".ucode");
1830                 ret = request_firmware(&ucode_raw, buf, &il->pci_dev->dev);
1831                 if (ret < 0) {
1832                         IL_ERR("%s firmware file req failed: %d\n", buf, ret);
1833                         if (ret == -ENOENT)
1834                                 continue;
1835                         else
1836                                 goto error;
1837                 } else {
1838                         if (idx < api_max)
1839                                 IL_ERR("Loaded firmware %s, "
1840                                        "which is deprecated. "
1841                                        " Please use API v%u instead.\n", buf,
1842                                        api_max);
1843                         D_INFO("Got firmware '%s' file "
1844                                "(%zd bytes) from disk\n", buf, ucode_raw->size);
1845                         break;
1846                 }
1847         }
1848
1849         if (ret < 0)
1850                 goto error;
1851
1852         /* Make sure that we got at least our header! */
1853         if (ucode_raw->size < il3945_ucode_get_header_size(1)) {
1854                 IL_ERR("File size way too small!\n");
1855                 ret = -EINVAL;
1856                 goto err_release;
1857         }
1858
1859         /* Data from ucode file:  header followed by uCode images */
1860         ucode = (struct il_ucode_header *)ucode_raw->data;
1861
1862         il->ucode_ver = le32_to_cpu(ucode->ver);
1863         api_ver = IL_UCODE_API(il->ucode_ver);
1864         inst_size = il3945_ucode_get_inst_size(ucode);
1865         data_size = il3945_ucode_get_data_size(ucode);
1866         init_size = il3945_ucode_get_init_size(ucode);
1867         init_data_size = il3945_ucode_get_init_data_size(ucode);
1868         boot_size = il3945_ucode_get_boot_size(ucode);
1869         src = il3945_ucode_get_data(ucode);
1870
1871         /* api_ver should match the api version forming part of the
1872          * firmware filename ... but we don't check for that and only rely
1873          * on the API version read from firmware header from here on forward */
1874
1875         if (api_ver < api_min || api_ver > api_max) {
1876                 IL_ERR("Driver unable to support your firmware API. "
1877                        "Driver supports v%u, firmware is v%u.\n", api_max,
1878                        api_ver);
1879                 il->ucode_ver = 0;
1880                 ret = -EINVAL;
1881                 goto err_release;
1882         }
1883         if (api_ver != api_max)
1884                 IL_ERR("Firmware has old API version. Expected %u, "
1885                        "got %u. New firmware can be obtained "
1886                        "from http://www.intellinuxwireless.org.\n", api_max,
1887                        api_ver);
1888
1889         IL_INFO("loaded firmware version %u.%u.%u.%u\n",
1890                 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
1891                 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
1892
1893         snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
1894                  "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
1895                  IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
1896                  IL_UCODE_SERIAL(il->ucode_ver));
1897
1898         D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
1899         D_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
1900         D_INFO("f/w package hdr runtime data size = %u\n", data_size);
1901         D_INFO("f/w package hdr init inst size = %u\n", init_size);
1902         D_INFO("f/w package hdr init data size = %u\n", init_data_size);
1903         D_INFO("f/w package hdr boot inst size = %u\n", boot_size);
1904
1905         /* Verify size of file vs. image size info in file's header */
1906         if (ucode_raw->size !=
1907             il3945_ucode_get_header_size(api_ver) + inst_size + data_size +
1908             init_size + init_data_size + boot_size) {
1909
1910                 D_INFO("uCode file size %zd does not match expected size\n",
1911                        ucode_raw->size);
1912                 ret = -EINVAL;
1913                 goto err_release;
1914         }
1915
1916         /* Verify that uCode images will fit in card's SRAM */
1917         if (inst_size > IL39_MAX_INST_SIZE) {
1918                 D_INFO("uCode instr len %d too large to fit in\n", inst_size);
1919                 ret = -EINVAL;
1920                 goto err_release;
1921         }
1922
1923         if (data_size > IL39_MAX_DATA_SIZE) {
1924                 D_INFO("uCode data len %d too large to fit in\n", data_size);
1925                 ret = -EINVAL;
1926                 goto err_release;
1927         }
1928         if (init_size > IL39_MAX_INST_SIZE) {
1929                 D_INFO("uCode init instr len %d too large to fit in\n",
1930                        init_size);
1931                 ret = -EINVAL;
1932                 goto err_release;
1933         }
1934         if (init_data_size > IL39_MAX_DATA_SIZE) {
1935                 D_INFO("uCode init data len %d too large to fit in\n",
1936                        init_data_size);
1937                 ret = -EINVAL;
1938                 goto err_release;
1939         }
1940         if (boot_size > IL39_MAX_BSM_SIZE) {
1941                 D_INFO("uCode boot instr len %d too large to fit in\n",
1942                        boot_size);
1943                 ret = -EINVAL;
1944                 goto err_release;
1945         }
1946
1947         /* Allocate ucode buffers for card's bus-master loading ... */
1948
1949         /* Runtime instructions and 2 copies of data:
1950          * 1) unmodified from disk
1951          * 2) backup cache for save/restore during power-downs */
1952         il->ucode_code.len = inst_size;
1953         il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
1954
1955         il->ucode_data.len = data_size;
1956         il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
1957
1958         il->ucode_data_backup.len = data_size;
1959         il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
1960
1961         if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
1962             !il->ucode_data_backup.v_addr)
1963                 goto err_pci_alloc;
1964
1965         /* Initialization instructions and data */
1966         if (init_size && init_data_size) {
1967                 il->ucode_init.len = init_size;
1968                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
1969
1970                 il->ucode_init_data.len = init_data_size;
1971                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
1972
1973                 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
1974                         goto err_pci_alloc;
1975         }
1976
1977         /* Bootstrap (instructions only, no data) */
1978         if (boot_size) {
1979                 il->ucode_boot.len = boot_size;
1980                 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
1981
1982                 if (!il->ucode_boot.v_addr)
1983                         goto err_pci_alloc;
1984         }
1985
1986         /* Copy images into buffers for card's bus-master reads ... */
1987
1988         /* Runtime instructions (first block of data in file) */
1989         len = inst_size;
1990         D_INFO("Copying (but not loading) uCode instr len %zd\n", len);
1991         memcpy(il->ucode_code.v_addr, src, len);
1992         src += len;
1993
1994         D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1995                il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
1996
1997         /* Runtime data (2nd block)
1998          * NOTE:  Copy into backup buffer will be done in il3945_up()  */
1999         len = data_size;
2000         D_INFO("Copying (but not loading) uCode data len %zd\n", len);
2001         memcpy(il->ucode_data.v_addr, src, len);
2002         memcpy(il->ucode_data_backup.v_addr, src, len);
2003         src += len;
2004
2005         /* Initialization instructions (3rd block) */
2006         if (init_size) {
2007                 len = init_size;
2008                 D_INFO("Copying (but not loading) init instr len %zd\n", len);
2009                 memcpy(il->ucode_init.v_addr, src, len);
2010                 src += len;
2011         }
2012
2013         /* Initialization data (4th block) */
2014         if (init_data_size) {
2015                 len = init_data_size;
2016                 D_INFO("Copying (but not loading) init data len %zd\n", len);
2017                 memcpy(il->ucode_init_data.v_addr, src, len);
2018                 src += len;
2019         }
2020
2021         /* Bootstrap instructions (5th block) */
2022         len = boot_size;
2023         D_INFO("Copying (but not loading) boot instr len %zd\n", len);
2024         memcpy(il->ucode_boot.v_addr, src, len);
2025
2026         /* We have our copies now, allow OS release its copies */
2027         release_firmware(ucode_raw);
2028         return 0;
2029
2030 err_pci_alloc:
2031         IL_ERR("failed to allocate pci memory\n");
2032         ret = -ENOMEM;
2033         il3945_dealloc_ucode_pci(il);
2034
2035 err_release:
2036         release_firmware(ucode_raw);
2037
2038 error:
2039         return ret;
2040 }
2041
2042 /*
2043  * il3945_set_ucode_ptrs - Set uCode address location
2044  *
2045  * Tell initialization uCode where to find runtime uCode.
2046  *
2047  * BSM registers initially contain pointers to initialization uCode.
2048  * We need to replace them to load runtime uCode inst and data,
2049  * and to save runtime data when powering down.
2050  */
2051 static int
2052 il3945_set_ucode_ptrs(struct il_priv *il)
2053 {
2054         dma_addr_t pinst;
2055         dma_addr_t pdata;
2056
2057         /* bits 31:0 for 3945 */
2058         pinst = il->ucode_code.p_addr;
2059         pdata = il->ucode_data_backup.p_addr;
2060
2061         /* Tell bootstrap uCode where to find image to load */
2062         il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
2063         il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
2064         il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, il->ucode_data.len);
2065
2066         /* Inst byte count must be last to set up, bit 31 signals uCode
2067          *   that all new ptr/size info is in place */
2068         il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG,
2069                    il->ucode_code.len | BSM_DRAM_INST_LOAD);
2070
2071         D_INFO("Runtime uCode pointers are set.\n");
2072
2073         return 0;
2074 }
2075
2076 /*
2077  * il3945_init_alive_start - Called after N_ALIVE notification received
2078  *
2079  * Called after N_ALIVE notification received from "initialize" uCode.
2080  *
2081  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2082  */
2083 static void
2084 il3945_init_alive_start(struct il_priv *il)
2085 {
2086         /* Check alive response for "valid" sign from uCode */
2087         if (il->card_alive_init.is_valid != UCODE_VALID_OK) {
2088                 /* We had an error bringing up the hardware, so take it
2089                  * all the way back down so we can try again */
2090                 D_INFO("Initialize Alive failed.\n");
2091                 goto restart;
2092         }
2093
2094         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2095          * This is a paranoid check, because we would not have gotten the
2096          * "initialize" alive if code weren't properly loaded.  */
2097         if (il3945_verify_ucode(il)) {
2098                 /* Runtime instruction load was bad;
2099                  * take it all the way back down so we can try again */
2100                 D_INFO("Bad \"initialize\" uCode load.\n");
2101                 goto restart;
2102         }
2103
2104         /* Send pointers to protocol/runtime uCode image ... init code will
2105          * load and launch runtime uCode, which will send us another "Alive"
2106          * notification. */
2107         D_INFO("Initialization Alive received.\n");
2108         if (il3945_set_ucode_ptrs(il)) {
2109                 /* Runtime instruction load won't happen;
2110                  * take it all the way back down so we can try again */
2111                 D_INFO("Couldn't set up uCode pointers.\n");
2112                 goto restart;
2113         }
2114         return;
2115
2116 restart:
2117         queue_work(il->workqueue, &il->restart);
2118 }
2119
2120 /*
2121  * il3945_alive_start - called after N_ALIVE notification received
2122  *                   from protocol/runtime uCode (initialization uCode's
2123  *                   Alive gets handled by il3945_init_alive_start()).
2124  */
2125 static void
2126 il3945_alive_start(struct il_priv *il)
2127 {
2128         int thermal_spin = 0;
2129         u32 rfkill;
2130
2131         D_INFO("Runtime Alive received.\n");
2132
2133         if (il->card_alive.is_valid != UCODE_VALID_OK) {
2134                 /* We had an error bringing up the hardware, so take it
2135                  * all the way back down so we can try again */
2136                 D_INFO("Alive failed.\n");
2137                 goto restart;
2138         }
2139
2140         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2141          * This is a paranoid check, because we would not have gotten the
2142          * "runtime" alive if code weren't properly loaded.  */
2143         if (il3945_verify_ucode(il)) {
2144                 /* Runtime instruction load was bad;
2145                  * take it all the way back down so we can try again */
2146                 D_INFO("Bad runtime uCode load.\n");
2147                 goto restart;
2148         }
2149
2150         rfkill = il_rd_prph(il, APMG_RFKILL_REG);
2151         D_INFO("RFKILL status: 0x%x\n", rfkill);
2152
2153         if (rfkill & 0x1) {
2154                 clear_bit(S_RFKILL, &il->status);
2155                 /* if RFKILL is not on, then wait for thermal
2156                  * sensor in adapter to kick in */
2157                 while (il3945_hw_get_temperature(il) == 0) {
2158                         thermal_spin++;
2159                         udelay(10);
2160                 }
2161
2162                 if (thermal_spin)
2163                         D_INFO("Thermal calibration took %dus\n",
2164                                thermal_spin * 10);
2165         } else
2166                 set_bit(S_RFKILL, &il->status);
2167
2168         /* After the ALIVE response, we can send commands to 3945 uCode */
2169         set_bit(S_ALIVE, &il->status);
2170
2171         /* Enable watchdog to monitor the driver tx queues */
2172         il_setup_watchdog(il);
2173
2174         if (il_is_rfkill(il))
2175                 return;
2176
2177         ieee80211_wake_queues(il->hw);
2178
2179         il->active_rate = RATES_MASK_3945;
2180
2181         il_power_update_mode(il, true);
2182
2183         if (il_is_associated(il)) {
2184                 struct il3945_rxon_cmd *active_rxon =
2185                     (struct il3945_rxon_cmd *)(&il->active);
2186
2187                 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2188                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2189         } else {
2190                 /* Initialize our rx_config data */
2191                 il_connection_init_rx_config(il);
2192         }
2193
2194         /* Configure Bluetooth device coexistence support */
2195         il_send_bt_config(il);
2196
2197         set_bit(S_READY, &il->status);
2198
2199         /* Configure the adapter for unassociated operation */
2200         il3945_commit_rxon(il);
2201
2202         il3945_reg_txpower_periodic(il);
2203
2204         D_INFO("ALIVE processing complete.\n");
2205         wake_up(&il->wait_command_queue);
2206
2207         return;
2208
2209 restart:
2210         queue_work(il->workqueue, &il->restart);
2211 }
2212
2213 static void il3945_cancel_deferred_work(struct il_priv *il);
2214
2215 static void
2216 __il3945_down(struct il_priv *il)
2217 {
2218         unsigned long flags;
2219         int exit_pending;
2220
2221         D_INFO(DRV_NAME " is going down\n");
2222
2223         il_scan_cancel_timeout(il, 200);
2224
2225         exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
2226
2227         /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
2228          * to prevent rearm timer */
2229         del_timer_sync(&il->watchdog);
2230
2231         /* Station information will now be cleared in device */
2232         il_clear_ucode_stations(il);
2233         il_dealloc_bcast_stations(il);
2234         il_clear_driver_stations(il);
2235
2236         /* Unblock any waiting calls */
2237         wake_up_all(&il->wait_command_queue);
2238
2239         /* Wipe out the EXIT_PENDING status bit if we are not actually
2240          * exiting the module */
2241         if (!exit_pending)
2242                 clear_bit(S_EXIT_PENDING, &il->status);
2243
2244         /* stop and reset the on-board processor */
2245         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2246
2247         /* tell the device to stop sending interrupts */
2248         spin_lock_irqsave(&il->lock, flags);
2249         il_disable_interrupts(il);
2250         spin_unlock_irqrestore(&il->lock, flags);
2251         il3945_synchronize_irq(il);
2252
2253         if (il->mac80211_registered)
2254                 ieee80211_stop_queues(il->hw);
2255
2256         /* If we have not previously called il3945_init() then
2257          * clear all bits but the RF Kill bits and return */
2258         if (!il_is_init(il)) {
2259                 il->status =
2260                     test_bit(S_RFKILL, &il->status) << S_RFKILL |
2261                     test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2262                     test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2263                 goto exit;
2264         }
2265
2266         /* ...otherwise clear out all the status bits but the RF Kill
2267          * bit and continue taking the NIC down. */
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_FW_ERROR, &il->status) << S_FW_ERROR |
2272             test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2273
2274         /*
2275          * We disabled and synchronized interrupt, and priv->mutex is taken, so
2276          * here is the only thread which will program device registers, but
2277          * still have lockdep assertions, so we are taking reg_lock.
2278          */
2279         spin_lock_irq(&il->reg_lock);
2280         /* FIXME: il_grab_nic_access if rfkill is off ? */
2281
2282         il3945_hw_txq_ctx_stop(il);
2283         il3945_hw_rxq_stop(il);
2284         /* Power-down device's busmaster DMA clocks */
2285         _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2286         udelay(5);
2287         /* Stop the device, and put it in low power state */
2288         _il_apm_stop(il);
2289
2290         spin_unlock_irq(&il->reg_lock);
2291
2292         il3945_hw_txq_ctx_free(il);
2293 exit:
2294         memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
2295         dev_kfree_skb(il->beacon_skb);
2296         il->beacon_skb = NULL;
2297
2298         /* clear out any free frames */
2299         il3945_clear_free_frames(il);
2300 }
2301
2302 static void
2303 il3945_down(struct il_priv *il)
2304 {
2305         mutex_lock(&il->mutex);
2306         __il3945_down(il);
2307         mutex_unlock(&il->mutex);
2308
2309         il3945_cancel_deferred_work(il);
2310 }
2311
2312 #define MAX_HW_RESTARTS 5
2313
2314 static int
2315 il3945_alloc_bcast_station(struct il_priv *il)
2316 {
2317         unsigned long flags;
2318         u8 sta_id;
2319
2320         spin_lock_irqsave(&il->sta_lock, flags);
2321         sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
2322         if (sta_id == IL_INVALID_STATION) {
2323                 IL_ERR("Unable to prepare broadcast station\n");
2324                 spin_unlock_irqrestore(&il->sta_lock, flags);
2325
2326                 return -EINVAL;
2327         }
2328
2329         il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
2330         il->stations[sta_id].used |= IL_STA_BCAST;
2331         spin_unlock_irqrestore(&il->sta_lock, flags);
2332
2333         return 0;
2334 }
2335
2336 static int
2337 __il3945_up(struct il_priv *il)
2338 {
2339         int rc, i;
2340
2341         rc = il3945_alloc_bcast_station(il);
2342         if (rc)
2343                 return rc;
2344
2345         if (test_bit(S_EXIT_PENDING, &il->status)) {
2346                 IL_WARN("Exit pending; will not bring the NIC up\n");
2347                 return -EIO;
2348         }
2349
2350         if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
2351                 IL_ERR("ucode not available for device bring up\n");
2352                 return -EIO;
2353         }
2354
2355         /* If platform's RF_KILL switch is NOT set to KILL */
2356         if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2357                 clear_bit(S_RFKILL, &il->status);
2358         else {
2359                 set_bit(S_RFKILL, &il->status);
2360                 return -ERFKILL;
2361         }
2362
2363         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2364
2365         rc = il3945_hw_nic_init(il);
2366         if (rc) {
2367                 IL_ERR("Unable to int nic\n");
2368                 return rc;
2369         }
2370
2371         /* make sure rfkill handshake bits are cleared */
2372         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2373         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2374
2375         /* clear (again), then enable host interrupts */
2376         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2377         il_enable_interrupts(il);
2378
2379         /* really make sure rfkill handshake bits are cleared */
2380         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2381         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2382
2383         /* Copy original ucode data image from disk into backup cache.
2384          * This will be used to initialize the on-board processor's
2385          * data SRAM for a clean start when the runtime program first loads. */
2386         memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
2387                il->ucode_data.len);
2388
2389         /* We return success when we resume from suspend and rf_kill is on. */
2390         if (test_bit(S_RFKILL, &il->status))
2391                 return 0;
2392
2393         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2394
2395                 /* load bootstrap state machine,
2396                  * load bootstrap program into processor's memory,
2397                  * prepare to load the "initialize" uCode */
2398                 rc = il->ops->load_ucode(il);
2399
2400                 if (rc) {
2401                         IL_ERR("Unable to set up bootstrap uCode: %d\n", rc);
2402                         continue;
2403                 }
2404
2405                 /* start card; "initialize" will load runtime ucode */
2406                 il3945_nic_start(il);
2407
2408                 D_INFO(DRV_NAME " is coming up\n");
2409
2410                 return 0;
2411         }
2412
2413         set_bit(S_EXIT_PENDING, &il->status);
2414         __il3945_down(il);
2415         clear_bit(S_EXIT_PENDING, &il->status);
2416
2417         /* tried to restart and config the device for as long as our
2418          * patience could withstand */
2419         IL_ERR("Unable to initialize device after %d attempts.\n", i);
2420         return -EIO;
2421 }
2422
2423 /*****************************************************************************
2424  *
2425  * Workqueue callbacks
2426  *
2427  *****************************************************************************/
2428
2429 static void
2430 il3945_bg_init_alive_start(struct work_struct *data)
2431 {
2432         struct il_priv *il =
2433             container_of(data, struct il_priv, init_alive_start.work);
2434
2435         mutex_lock(&il->mutex);
2436         if (test_bit(S_EXIT_PENDING, &il->status))
2437                 goto out;
2438
2439         il3945_init_alive_start(il);
2440 out:
2441         mutex_unlock(&il->mutex);
2442 }
2443
2444 static void
2445 il3945_bg_alive_start(struct work_struct *data)
2446 {
2447         struct il_priv *il =
2448             container_of(data, struct il_priv, alive_start.work);
2449
2450         mutex_lock(&il->mutex);
2451         if (test_bit(S_EXIT_PENDING, &il->status) || il->txq == NULL)
2452                 goto out;
2453
2454         il3945_alive_start(il);
2455 out:
2456         mutex_unlock(&il->mutex);
2457 }
2458
2459 /*
2460  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2461  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2462  * *is* readable even when device has been SW_RESET into low power mode
2463  * (e.g. during RF KILL).
2464  */
2465 static void
2466 il3945_rfkill_poll(struct work_struct *data)
2467 {
2468         struct il_priv *il =
2469             container_of(data, struct il_priv, _3945.rfkill_poll.work);
2470         bool old_rfkill = test_bit(S_RFKILL, &il->status);
2471         bool new_rfkill =
2472             !(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2473
2474         if (new_rfkill != old_rfkill) {
2475                 if (new_rfkill)
2476                         set_bit(S_RFKILL, &il->status);
2477                 else
2478                         clear_bit(S_RFKILL, &il->status);
2479
2480                 wiphy_rfkill_set_hw_state(il->hw->wiphy, new_rfkill);
2481
2482                 D_RF_KILL("RF_KILL bit toggled to %s.\n",
2483                           new_rfkill ? "disable radio" : "enable radio");
2484         }
2485
2486         /* Keep this running, even if radio now enabled.  This will be
2487          * cancelled in mac_start() if system decides to start again */
2488         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2489                            round_jiffies_relative(2 * HZ));
2490
2491 }
2492
2493 int
2494 il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
2495 {
2496         struct il_host_cmd cmd = {
2497                 .id = C_SCAN,
2498                 .len = sizeof(struct il3945_scan_cmd),
2499                 .flags = CMD_SIZE_HUGE,
2500         };
2501         struct il3945_scan_cmd *scan;
2502         u8 n_probes = 0;
2503         enum nl80211_band band;
2504         bool is_active = false;
2505         int ret;
2506         u16 len;
2507
2508         lockdep_assert_held(&il->mutex);
2509
2510         if (!il->scan_cmd) {
2511                 il->scan_cmd =
2512                     kmalloc(sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE,
2513                             GFP_KERNEL);
2514                 if (!il->scan_cmd) {
2515                         D_SCAN("Fail to allocate scan memory\n");
2516                         return -ENOMEM;
2517                 }
2518         }
2519         scan = il->scan_cmd;
2520         memset(scan, 0, sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE);
2521
2522         scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
2523         scan->quiet_time = IL_ACTIVE_QUIET_TIME;
2524
2525         if (il_is_associated(il)) {
2526                 u16 interval;
2527                 u32 extra;
2528                 u32 suspend_time = 100;
2529                 u32 scan_suspend_time = 100;
2530
2531                 D_INFO("Scanning while associated...\n");
2532
2533                 interval = vif->bss_conf.beacon_int;
2534
2535                 scan->suspend_time = 0;
2536                 scan->max_out_time = cpu_to_le32(200 * 1024);
2537                 if (!interval)
2538                         interval = suspend_time;
2539                 /*
2540                  * suspend time format:
2541                  *  0-19: beacon interval in usec (time before exec.)
2542                  * 20-23: 0
2543                  * 24-31: number of beacons (suspend between channels)
2544                  */
2545
2546                 extra = (suspend_time / interval) << 24;
2547                 scan_suspend_time =
2548                     0xFF0FFFFF & (extra | ((suspend_time % interval) * 1024));
2549
2550                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2551                 D_SCAN("suspend_time 0x%X beacon interval %d\n",
2552                        scan_suspend_time, interval);
2553         }
2554
2555         if (il->scan_request->n_ssids) {
2556                 int i, p = 0;
2557                 D_SCAN("Kicking off active scan\n");
2558                 for (i = 0; i < il->scan_request->n_ssids; i++) {
2559                         /* always does wildcard anyway */
2560                         if (!il->scan_request->ssids[i].ssid_len)
2561                                 continue;
2562                         scan->direct_scan[p].id = WLAN_EID_SSID;
2563                         scan->direct_scan[p].len =
2564                             il->scan_request->ssids[i].ssid_len;
2565                         memcpy(scan->direct_scan[p].ssid,
2566                                il->scan_request->ssids[i].ssid,
2567                                il->scan_request->ssids[i].ssid_len);
2568                         n_probes++;
2569                         p++;
2570                 }
2571                 is_active = true;
2572         } else
2573                 D_SCAN("Kicking off passive scan.\n");
2574
2575         /* We don't build a direct scan probe request; the uCode will do
2576          * that based on the direct_mask added to each channel entry */
2577         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2578         scan->tx_cmd.sta_id = il->hw_params.bcast_id;
2579         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2580
2581         /* flags + rate selection */
2582
2583         switch (il->scan_band) {
2584         case NL80211_BAND_2GHZ:
2585                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2586                 scan->tx_cmd.rate = RATE_1M_PLCP;
2587                 band = NL80211_BAND_2GHZ;
2588                 break;
2589         case NL80211_BAND_5GHZ:
2590                 scan->tx_cmd.rate = RATE_6M_PLCP;
2591                 band = NL80211_BAND_5GHZ;
2592                 break;
2593         default:
2594                 IL_WARN("Invalid scan band\n");
2595                 return -EIO;
2596         }
2597
2598         /*
2599          * If active scaning is requested but a certain channel is marked
2600          * passive, we can do active scanning if we detect transmissions. For
2601          * passive only scanning disable switching to active on any channel.
2602          */
2603         scan->good_CRC_th =
2604             is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
2605
2606         len =
2607             il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
2608                               vif->addr, il->scan_request->ie,
2609                               il->scan_request->ie_len,
2610                               IL_MAX_SCAN_SIZE - sizeof(*scan));
2611         scan->tx_cmd.len = cpu_to_le16(len);
2612
2613         /* select Rx antennas */
2614         scan->flags |= il3945_get_antenna_flags(il);
2615
2616         scan->channel_count =
2617             il3945_get_channels_for_scan(il, band, is_active, n_probes,
2618                                          (void *)&scan->data[len], vif);
2619         if (scan->channel_count == 0) {
2620                 D_SCAN("channel count %d\n", scan->channel_count);
2621                 return -EIO;
2622         }
2623
2624         cmd.len +=
2625             le16_to_cpu(scan->tx_cmd.len) +
2626             scan->channel_count * sizeof(struct il3945_scan_channel);
2627         cmd.data = scan;
2628         scan->len = cpu_to_le16(cmd.len);
2629
2630         set_bit(S_SCAN_HW, &il->status);
2631         ret = il_send_cmd_sync(il, &cmd);
2632         if (ret)
2633                 clear_bit(S_SCAN_HW, &il->status);
2634         return ret;
2635 }
2636
2637 void
2638 il3945_post_scan(struct il_priv *il)
2639 {
2640         /*
2641          * Since setting the RXON may have been deferred while
2642          * performing the scan, fire one off if needed
2643          */
2644         if (memcmp(&il->staging, &il->active, sizeof(il->staging)))
2645                 il3945_commit_rxon(il);
2646 }
2647
2648 static void
2649 il3945_bg_restart(struct work_struct *data)
2650 {
2651         struct il_priv *il = container_of(data, struct il_priv, restart);
2652
2653         if (test_bit(S_EXIT_PENDING, &il->status))
2654                 return;
2655
2656         if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
2657                 mutex_lock(&il->mutex);
2658                 il->is_open = 0;
2659                 mutex_unlock(&il->mutex);
2660                 il3945_down(il);
2661                 ieee80211_restart_hw(il->hw);
2662         } else {
2663                 il3945_down(il);
2664
2665                 mutex_lock(&il->mutex);
2666                 if (test_bit(S_EXIT_PENDING, &il->status)) {
2667                         mutex_unlock(&il->mutex);
2668                         return;
2669                 }
2670
2671                 __il3945_up(il);
2672                 mutex_unlock(&il->mutex);
2673         }
2674 }
2675
2676 static void
2677 il3945_bg_rx_replenish(struct work_struct *data)
2678 {
2679         struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
2680
2681         mutex_lock(&il->mutex);
2682         if (test_bit(S_EXIT_PENDING, &il->status))
2683                 goto out;
2684
2685         il3945_rx_replenish(il);
2686 out:
2687         mutex_unlock(&il->mutex);
2688 }
2689
2690 void
2691 il3945_post_associate(struct il_priv *il)
2692 {
2693         int rc = 0;
2694
2695         if (!il->vif || !il->is_open)
2696                 return;
2697
2698         D_ASSOC("Associated as %d to: %pM\n", il->vif->cfg.aid,
2699                 il->active.bssid_addr);
2700
2701         if (test_bit(S_EXIT_PENDING, &il->status))
2702                 return;
2703
2704         il_scan_cancel_timeout(il, 200);
2705
2706         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2707         il3945_commit_rxon(il);
2708
2709         rc = il_send_rxon_timing(il);
2710         if (rc)
2711                 IL_WARN("C_RXON_TIMING failed - " "Attempting to continue.\n");
2712
2713         il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2714
2715         il->staging.assoc_id = cpu_to_le16(il->vif->cfg.aid);
2716
2717         D_ASSOC("assoc id %d beacon interval %d\n", il->vif->cfg.aid,
2718                 il->vif->bss_conf.beacon_int);
2719
2720         if (il->vif->bss_conf.use_short_preamble)
2721                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2722         else
2723                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2724
2725         if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2726                 if (il->vif->bss_conf.use_short_slot)
2727                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2728                 else
2729                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2730         }
2731
2732         il3945_commit_rxon(il);
2733
2734         switch (il->vif->type) {
2735         case NL80211_IFTYPE_STATION:
2736                 il3945_rate_scale_init(il->hw, IL_AP_ID);
2737                 break;
2738         case NL80211_IFTYPE_ADHOC:
2739                 il3945_send_beacon_cmd(il);
2740                 break;
2741         default:
2742                 IL_ERR("%s Should not be called in %d mode\n", __func__,
2743                       il->vif->type);
2744                 break;
2745         }
2746 }
2747
2748 /*****************************************************************************
2749  *
2750  * mac80211 entry point functions
2751  *
2752  *****************************************************************************/
2753
2754 #define UCODE_READY_TIMEOUT     (2 * HZ)
2755
2756 static int
2757 il3945_mac_start(struct ieee80211_hw *hw)
2758 {
2759         struct il_priv *il = hw->priv;
2760         int ret;
2761
2762         /* we should be verifying the device is ready to be opened */
2763         mutex_lock(&il->mutex);
2764         D_MAC80211("enter\n");
2765
2766         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2767          * ucode filename and max sizes are card-specific. */
2768
2769         if (!il->ucode_code.len) {
2770                 ret = il3945_read_ucode(il);
2771                 if (ret) {
2772                         IL_ERR("Could not read microcode: %d\n", ret);
2773                         mutex_unlock(&il->mutex);
2774                         goto out_release_irq;
2775                 }
2776         }
2777
2778         ret = __il3945_up(il);
2779
2780         mutex_unlock(&il->mutex);
2781
2782         if (ret)
2783                 goto out_release_irq;
2784
2785         D_INFO("Start UP work.\n");
2786
2787         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
2788          * mac80211 will not be run successfully. */
2789         ret = wait_event_timeout(il->wait_command_queue,
2790                                  test_bit(S_READY, &il->status),
2791                                  UCODE_READY_TIMEOUT);
2792         if (!ret) {
2793                 if (!test_bit(S_READY, &il->status)) {
2794                         IL_ERR("Wait for START_ALIVE timeout after %dms.\n",
2795                                jiffies_to_msecs(UCODE_READY_TIMEOUT));
2796                         ret = -ETIMEDOUT;
2797                         goto out_release_irq;
2798                 }
2799         }
2800
2801         /* ucode is running and will send rfkill notifications,
2802          * no need to poll the killswitch state anymore */
2803         cancel_delayed_work(&il->_3945.rfkill_poll);
2804
2805         il->is_open = 1;
2806         D_MAC80211("leave\n");
2807         return 0;
2808
2809 out_release_irq:
2810         il->is_open = 0;
2811         D_MAC80211("leave - failed\n");
2812         return ret;
2813 }
2814
2815 static void
2816 il3945_mac_stop(struct ieee80211_hw *hw)
2817 {
2818         struct il_priv *il = hw->priv;
2819
2820         D_MAC80211("enter\n");
2821
2822         if (!il->is_open) {
2823                 D_MAC80211("leave - skip\n");
2824                 return;
2825         }
2826
2827         il->is_open = 0;
2828
2829         il3945_down(il);
2830
2831         flush_workqueue(il->workqueue);
2832
2833         /* start polling the killswitch state again */
2834         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2835                            round_jiffies_relative(2 * HZ));
2836
2837         D_MAC80211("leave\n");
2838 }
2839
2840 static void
2841 il3945_mac_tx(struct ieee80211_hw *hw,
2842                struct ieee80211_tx_control *control,
2843                struct sk_buff *skb)
2844 {
2845         struct il_priv *il = hw->priv;
2846
2847         D_MAC80211("enter\n");
2848
2849         D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2850              ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2851
2852         if (il3945_tx_skb(il, control->sta, skb))
2853                 dev_kfree_skb_any(skb);
2854
2855         D_MAC80211("leave\n");
2856 }
2857
2858 void
2859 il3945_config_ap(struct il_priv *il)
2860 {
2861         struct ieee80211_vif *vif = il->vif;
2862         int rc = 0;
2863
2864         if (test_bit(S_EXIT_PENDING, &il->status))
2865                 return;
2866
2867         /* The following should be done only at AP bring up */
2868         if (!(il_is_associated(il))) {
2869
2870                 /* RXON - unassoc (to set timing command) */
2871                 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2872                 il3945_commit_rxon(il);
2873
2874                 /* RXON Timing */
2875                 rc = il_send_rxon_timing(il);
2876                 if (rc)
2877                         IL_WARN("C_RXON_TIMING failed - "
2878                                 "Attempting to continue.\n");
2879
2880                 il->staging.assoc_id = 0;
2881
2882                 if (vif->bss_conf.use_short_preamble)
2883                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2884                 else
2885                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2886
2887                 if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2888                         if (vif->bss_conf.use_short_slot)
2889                                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2890                         else
2891                                 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2892                 }
2893                 /* restore RXON assoc */
2894                 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2895                 il3945_commit_rxon(il);
2896         }
2897         il3945_send_beacon_cmd(il);
2898 }
2899
2900 static int
2901 il3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2902                    struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2903                    struct ieee80211_key_conf *key)
2904 {
2905         struct il_priv *il = hw->priv;
2906         int ret = 0;
2907         u8 sta_id = IL_INVALID_STATION;
2908         u8 static_key;
2909
2910         D_MAC80211("enter\n");
2911
2912         if (il3945_mod_params.sw_crypto) {
2913                 D_MAC80211("leave - hwcrypto disabled\n");
2914                 return -EOPNOTSUPP;
2915         }
2916
2917         /*
2918          * To support IBSS RSN, don't program group keys in IBSS, the
2919          * hardware will then not attempt to decrypt the frames.
2920          */
2921         if (vif->type == NL80211_IFTYPE_ADHOC &&
2922             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
2923                 D_MAC80211("leave - IBSS RSN\n");
2924                 return -EOPNOTSUPP;
2925         }
2926
2927         static_key = !il_is_associated(il);
2928
2929         if (!static_key) {
2930                 sta_id = il_sta_id_or_broadcast(il, sta);
2931                 if (sta_id == IL_INVALID_STATION) {
2932                         D_MAC80211("leave - station not found\n");
2933                         return -EINVAL;
2934                 }
2935         }
2936
2937         mutex_lock(&il->mutex);
2938         il_scan_cancel_timeout(il, 100);
2939
2940         switch (cmd) {
2941         case SET_KEY:
2942                 if (static_key)
2943                         ret = il3945_set_static_key(il, key);
2944                 else
2945                         ret = il3945_set_dynamic_key(il, key, sta_id);
2946                 D_MAC80211("enable hwcrypto key\n");
2947                 break;
2948         case DISABLE_KEY:
2949                 if (static_key)
2950                         ret = il3945_remove_static_key(il);
2951                 else
2952                         ret = il3945_clear_sta_key_info(il, sta_id);
2953                 D_MAC80211("disable hwcrypto key\n");
2954                 break;
2955         default:
2956                 ret = -EINVAL;
2957         }
2958
2959         D_MAC80211("leave ret %d\n", ret);
2960         mutex_unlock(&il->mutex);
2961
2962         return ret;
2963 }
2964
2965 static int
2966 il3945_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2967                    struct ieee80211_sta *sta)
2968 {
2969         struct il_priv *il = hw->priv;
2970         struct il3945_sta_priv *sta_priv = (void *)sta->drv_priv;
2971         int ret;
2972         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2973         u8 sta_id;
2974
2975         mutex_lock(&il->mutex);
2976         D_INFO("station %pM\n", sta->addr);
2977         sta_priv->common.sta_id = IL_INVALID_STATION;
2978
2979         ret = il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
2980         if (ret) {
2981                 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
2982                 /* Should we return success if return code is EEXIST ? */
2983                 mutex_unlock(&il->mutex);
2984                 return ret;
2985         }
2986
2987         sta_priv->common.sta_id = sta_id;
2988
2989         /* Initialize rate scaling */
2990         D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
2991         il3945_rs_rate_init(il, sta, sta_id);
2992         mutex_unlock(&il->mutex);
2993
2994         return 0;
2995 }
2996
2997 static void
2998 il3945_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
2999                         unsigned int *total_flags, u64 multicast)
3000 {
3001         struct il_priv *il = hw->priv;
3002         __le32 filter_or = 0, filter_nand = 0;
3003
3004 #define CHK(test, flag) do { \
3005         if (*total_flags & (test))              \
3006                 filter_or |= (flag);            \
3007         else                                    \
3008                 filter_nand |= (flag);          \
3009         } while (0)
3010
3011         D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
3012                    *total_flags);
3013
3014         CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
3015         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3016         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3017
3018 #undef CHK
3019
3020         mutex_lock(&il->mutex);
3021
3022         il->staging.filter_flags &= ~filter_nand;
3023         il->staging.filter_flags |= filter_or;
3024
3025         /*
3026          * Not committing directly because hardware can perform a scan,
3027          * but even if hw is ready, committing here breaks for some reason,
3028          * we'll eventually commit the filter flags change anyway.
3029          */
3030
3031         mutex_unlock(&il->mutex);
3032
3033         /*
3034          * Receiving all multicast frames is always enabled by the
3035          * default flags setup in il_connection_init_rx_config()
3036          * since we currently do not support programming multicast
3037          * filters into the device.
3038          */
3039         *total_flags &=
3040             FIF_OTHER_BSS | FIF_ALLMULTI |
3041             FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3042 }
3043
3044 /*****************************************************************************
3045  *
3046  * sysfs attributes
3047  *
3048  *****************************************************************************/
3049
3050 #ifdef CONFIG_IWLEGACY_DEBUG
3051
3052 /*
3053  * The following adds a new attribute to the sysfs representation
3054  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3055  * used for controlling the debug level.
3056  *
3057  * See the level definitions in iwl for details.
3058  *
3059  * The debug_level being managed using sysfs below is a per device debug
3060  * level that is used instead of the global debug level if it (the per
3061  * device debug level) is set.
3062  */
3063 static ssize_t
3064 il3945_show_debug_level(struct device *d, struct device_attribute *attr,
3065                         char *buf)
3066 {
3067         struct il_priv *il = dev_get_drvdata(d);
3068         return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
3069 }
3070
3071 static ssize_t
3072 il3945_store_debug_level(struct device *d, struct device_attribute *attr,
3073                          const char *buf, size_t count)
3074 {
3075         struct il_priv *il = dev_get_drvdata(d);
3076         unsigned long val;
3077         int ret;
3078
3079         ret = kstrtoul(buf, 0, &val);
3080         if (ret)
3081                 IL_INFO("%s is not in hex or decimal form.\n", buf);
3082         else
3083                 il->debug_level = val;
3084
3085         return strnlen(buf, count);
3086 }
3087
3088 static DEVICE_ATTR(debug_level, 0644, il3945_show_debug_level,
3089                    il3945_store_debug_level);
3090
3091 #endif /* CONFIG_IWLEGACY_DEBUG */
3092
3093 static ssize_t
3094 il3945_show_temperature(struct device *d, struct device_attribute *attr,
3095                         char *buf)
3096 {
3097         struct il_priv *il = dev_get_drvdata(d);
3098
3099         if (!il_is_alive(il))
3100                 return -EAGAIN;
3101
3102         return sprintf(buf, "%d\n", il3945_hw_get_temperature(il));
3103 }
3104
3105 static DEVICE_ATTR(temperature, 0444, il3945_show_temperature, NULL);
3106
3107 static ssize_t
3108 il3945_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
3109 {
3110         struct il_priv *il = dev_get_drvdata(d);
3111         return sprintf(buf, "%d\n", il->tx_power_user_lmt);
3112 }
3113
3114 static ssize_t
3115 il3945_store_tx_power(struct device *d, struct device_attribute *attr,
3116                       const char *buf, size_t count)
3117 {
3118         struct il_priv *il = dev_get_drvdata(d);
3119         char *p = (char *)buf;
3120         u32 val;
3121
3122         val = simple_strtoul(p, &p, 10);
3123         if (p == buf)
3124                 IL_INFO(": %s is not in decimal form.\n", buf);
3125         else
3126                 il3945_hw_reg_set_txpower(il, val);
3127
3128         return count;
3129 }
3130
3131 static DEVICE_ATTR(tx_power, 0644, il3945_show_tx_power, il3945_store_tx_power);
3132
3133 static ssize_t
3134 il3945_show_flags(struct device *d, struct device_attribute *attr, char *buf)
3135 {
3136         struct il_priv *il = dev_get_drvdata(d);
3137
3138         return sprintf(buf, "0x%04X\n", il->active.flags);
3139 }
3140
3141 static ssize_t
3142 il3945_store_flags(struct device *d, struct device_attribute *attr,
3143                    const char *buf, size_t count)
3144 {
3145         struct il_priv *il = dev_get_drvdata(d);
3146         u32 flags = simple_strtoul(buf, NULL, 0);
3147
3148         mutex_lock(&il->mutex);
3149         if (le32_to_cpu(il->staging.flags) != flags) {
3150                 /* Cancel any currently running scans... */
3151                 if (il_scan_cancel_timeout(il, 100))
3152                         IL_WARN("Could not cancel scan.\n");
3153                 else {
3154                         D_INFO("Committing rxon.flags = 0x%04X\n", flags);
3155                         il->staging.flags = cpu_to_le32(flags);
3156                         il3945_commit_rxon(il);
3157                 }
3158         }
3159         mutex_unlock(&il->mutex);
3160
3161         return count;
3162 }
3163
3164 static DEVICE_ATTR(flags, 0644, il3945_show_flags, il3945_store_flags);
3165
3166 static ssize_t
3167 il3945_show_filter_flags(struct device *d, struct device_attribute *attr,
3168                          char *buf)
3169 {
3170         struct il_priv *il = dev_get_drvdata(d);
3171
3172         return sprintf(buf, "0x%04X\n", le32_to_cpu(il->active.filter_flags));
3173 }
3174
3175 static ssize_t
3176 il3945_store_filter_flags(struct device *d, struct device_attribute *attr,
3177                           const char *buf, size_t count)
3178 {
3179         struct il_priv *il = dev_get_drvdata(d);
3180         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3181
3182         mutex_lock(&il->mutex);
3183         if (le32_to_cpu(il->staging.filter_flags) != filter_flags) {
3184                 /* Cancel any currently running scans... */
3185                 if (il_scan_cancel_timeout(il, 100))
3186                         IL_WARN("Could not cancel scan.\n");
3187                 else {
3188                         D_INFO("Committing rxon.filter_flags = " "0x%04X\n",
3189                                filter_flags);
3190                         il->staging.filter_flags = cpu_to_le32(filter_flags);
3191                         il3945_commit_rxon(il);
3192                 }
3193         }
3194         mutex_unlock(&il->mutex);
3195
3196         return count;
3197 }
3198
3199 static DEVICE_ATTR(filter_flags, 0644, il3945_show_filter_flags,
3200                    il3945_store_filter_flags);
3201
3202 static ssize_t
3203 il3945_show_measurement(struct device *d, struct device_attribute *attr,
3204                         char *buf)
3205 {
3206         struct il_priv *il = dev_get_drvdata(d);
3207         struct il_spectrum_notification measure_report;
3208         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3209         u8 *data = (u8 *) &measure_report;
3210         unsigned long flags;
3211
3212         spin_lock_irqsave(&il->lock, flags);
3213         if (!(il->measurement_status & MEASUREMENT_READY)) {
3214                 spin_unlock_irqrestore(&il->lock, flags);
3215                 return 0;
3216         }
3217         memcpy(&measure_report, &il->measure_report, size);
3218         il->measurement_status = 0;
3219         spin_unlock_irqrestore(&il->lock, flags);
3220
3221         while (size && PAGE_SIZE - len) {
3222                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3223                                    PAGE_SIZE - len, true);
3224                 len = strlen(buf);
3225                 if (PAGE_SIZE - len)
3226                         buf[len++] = '\n';
3227
3228                 ofs += 16;
3229                 size -= min(size, 16U);
3230         }
3231
3232         return len;
3233 }
3234
3235 static ssize_t
3236 il3945_store_measurement(struct device *d, struct device_attribute *attr,
3237                          const char *buf, size_t count)
3238 {
3239         struct il_priv *il = dev_get_drvdata(d);
3240         struct ieee80211_measurement_params params = {
3241                 .channel = le16_to_cpu(il->active.channel),
3242                 .start_time = cpu_to_le64(il->_3945.last_tsf),
3243                 .duration = cpu_to_le16(1),
3244         };
3245         u8 type = IL_MEASURE_BASIC;
3246         u8 buffer[32];
3247         u8 channel;
3248
3249         if (count) {
3250                 char *p = buffer;
3251                 strscpy(buffer, buf, sizeof(buffer));
3252                 channel = simple_strtoul(p, NULL, 0);
3253                 if (channel)
3254                         params.channel = channel;
3255
3256                 p = buffer;
3257                 while (*p && *p != ' ')
3258                         p++;
3259                 if (*p)
3260                         type = simple_strtoul(p + 1, NULL, 0);
3261         }
3262
3263         D_INFO("Invoking measurement of type %d on " "channel %d (for '%s')\n",
3264                type, params.channel, buf);
3265         il3945_get_measurement(il, &params, type);
3266
3267         return count;
3268 }
3269
3270 static DEVICE_ATTR(measurement, 0600, il3945_show_measurement,
3271                    il3945_store_measurement);
3272
3273 static ssize_t
3274 il3945_store_retry_rate(struct device *d, struct device_attribute *attr,
3275                         const char *buf, size_t count)
3276 {
3277         struct il_priv *il = dev_get_drvdata(d);
3278
3279         il->retry_rate = simple_strtoul(buf, NULL, 0);
3280         if (il->retry_rate <= 0)
3281                 il->retry_rate = 1;
3282
3283         return count;
3284 }
3285
3286 static ssize_t
3287 il3945_show_retry_rate(struct device *d, struct device_attribute *attr,
3288                        char *buf)
3289 {
3290         struct il_priv *il = dev_get_drvdata(d);
3291         return sprintf(buf, "%d", il->retry_rate);
3292 }
3293
3294 static DEVICE_ATTR(retry_rate, 0600, il3945_show_retry_rate,
3295                    il3945_store_retry_rate);
3296
3297 static ssize_t
3298 il3945_show_channels(struct device *d, struct device_attribute *attr, char *buf)
3299 {
3300         /* all this shit doesn't belong into sysfs anyway */
3301         return 0;
3302 }
3303
3304 static DEVICE_ATTR(channels, 0400, il3945_show_channels, NULL);
3305
3306 static ssize_t
3307 il3945_show_antenna(struct device *d, struct device_attribute *attr, char *buf)
3308 {
3309         struct il_priv *il = dev_get_drvdata(d);
3310
3311         if (!il_is_alive(il))
3312                 return -EAGAIN;
3313
3314         return sprintf(buf, "%d\n", il3945_mod_params.antenna);
3315 }
3316
3317 static ssize_t
3318 il3945_store_antenna(struct device *d, struct device_attribute *attr,
3319                      const char *buf, size_t count)
3320 {
3321         struct il_priv *il __maybe_unused = dev_get_drvdata(d);
3322         int ant;
3323
3324         if (count == 0)
3325                 return 0;
3326
3327         if (sscanf(buf, "%1i", &ant) != 1) {
3328                 D_INFO("not in hex or decimal form.\n");
3329                 return count;
3330         }
3331
3332         if (ant >= 0 && ant <= 2) {
3333                 D_INFO("Setting antenna select to %d.\n", ant);
3334                 il3945_mod_params.antenna = (enum il3945_antenna)ant;
3335         } else
3336                 D_INFO("Bad antenna select value %d.\n", ant);
3337
3338         return count;
3339 }
3340
3341 static DEVICE_ATTR(antenna, 0644, il3945_show_antenna, il3945_store_antenna);
3342
3343 static ssize_t
3344 il3945_show_status(struct device *d, struct device_attribute *attr, char *buf)
3345 {
3346         struct il_priv *il = dev_get_drvdata(d);
3347         if (!il_is_alive(il))
3348                 return -EAGAIN;
3349         return sprintf(buf, "0x%08x\n", (int)il->status);
3350 }
3351
3352 static DEVICE_ATTR(status, 0444, il3945_show_status, NULL);
3353
3354 static ssize_t
3355 il3945_dump_error_log(struct device *d, struct device_attribute *attr,
3356                       const char *buf, size_t count)
3357 {
3358         struct il_priv *il = dev_get_drvdata(d);
3359         char *p = (char *)buf;
3360
3361         if (p[0] == '1')
3362                 il3945_dump_nic_error_log(il);
3363
3364         return strnlen(buf, count);
3365 }
3366
3367 static DEVICE_ATTR(dump_errors, 0200, NULL, il3945_dump_error_log);
3368
3369 /*****************************************************************************
3370  *
3371  * driver setup and tear down
3372  *
3373  *****************************************************************************/
3374
3375 static int
3376 il3945_setup_deferred_work(struct il_priv *il)
3377 {
3378         il->workqueue = create_singlethread_workqueue(DRV_NAME);
3379         if (!il->workqueue)
3380                 return -ENOMEM;
3381
3382         init_waitqueue_head(&il->wait_command_queue);
3383
3384         INIT_WORK(&il->restart, il3945_bg_restart);
3385         INIT_WORK(&il->rx_replenish, il3945_bg_rx_replenish);
3386         INIT_DELAYED_WORK(&il->init_alive_start, il3945_bg_init_alive_start);
3387         INIT_DELAYED_WORK(&il->alive_start, il3945_bg_alive_start);
3388         INIT_DELAYED_WORK(&il->_3945.rfkill_poll, il3945_rfkill_poll);
3389
3390         il_setup_scan_deferred_work(il);
3391
3392         il3945_hw_setup_deferred_work(il);
3393
3394         timer_setup(&il->watchdog, il_bg_watchdog, 0);
3395
3396         tasklet_setup(&il->irq_tasklet, il3945_irq_tasklet);
3397
3398         return 0;
3399 }
3400
3401 static void
3402 il3945_cancel_deferred_work(struct il_priv *il)
3403 {
3404         il3945_hw_cancel_deferred_work(il);
3405
3406         cancel_delayed_work_sync(&il->init_alive_start);
3407         cancel_delayed_work(&il->alive_start);
3408
3409         il_cancel_scan_deferred_work(il);
3410 }
3411
3412 static struct attribute *il3945_sysfs_entries[] = {
3413         &dev_attr_antenna.attr,
3414         &dev_attr_channels.attr,
3415         &dev_attr_dump_errors.attr,
3416         &dev_attr_flags.attr,
3417         &dev_attr_filter_flags.attr,
3418         &dev_attr_measurement.attr,
3419         &dev_attr_retry_rate.attr,
3420         &dev_attr_status.attr,
3421         &dev_attr_temperature.attr,
3422         &dev_attr_tx_power.attr,
3423 #ifdef CONFIG_IWLEGACY_DEBUG
3424         &dev_attr_debug_level.attr,
3425 #endif
3426         NULL
3427 };
3428
3429 static const struct attribute_group il3945_attribute_group = {
3430         .name = NULL,           /* put in device directory */
3431         .attrs = il3945_sysfs_entries,
3432 };
3433
3434 static struct ieee80211_ops il3945_mac_ops __ro_after_init = {
3435         .add_chanctx = ieee80211_emulate_add_chanctx,
3436         .remove_chanctx = ieee80211_emulate_remove_chanctx,
3437         .change_chanctx = ieee80211_emulate_change_chanctx,
3438         .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
3439         .tx = il3945_mac_tx,
3440         .wake_tx_queue = ieee80211_handle_wake_tx_queue,
3441         .start = il3945_mac_start,
3442         .stop = il3945_mac_stop,
3443         .add_interface = il_mac_add_interface,
3444         .remove_interface = il_mac_remove_interface,
3445         .change_interface = il_mac_change_interface,
3446         .config = il_mac_config,
3447         .configure_filter = il3945_configure_filter,
3448         .set_key = il3945_mac_set_key,
3449         .conf_tx = il_mac_conf_tx,
3450         .reset_tsf = il_mac_reset_tsf,
3451         .bss_info_changed = il_mac_bss_info_changed,
3452         .hw_scan = il_mac_hw_scan,
3453         .sta_add = il3945_mac_sta_add,
3454         .sta_remove = il_mac_sta_remove,
3455         .tx_last_beacon = il_mac_tx_last_beacon,
3456         .flush = il_mac_flush,
3457 };
3458
3459 static int
3460 il3945_init_drv(struct il_priv *il)
3461 {
3462         int ret;
3463         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
3464
3465         il->retry_rate = 1;
3466         il->beacon_skb = NULL;
3467
3468         spin_lock_init(&il->sta_lock);
3469         spin_lock_init(&il->hcmd_lock);
3470
3471         INIT_LIST_HEAD(&il->free_frames);
3472
3473         mutex_init(&il->mutex);
3474
3475         il->ieee_channels = NULL;
3476         il->ieee_rates = NULL;
3477         il->band = NL80211_BAND_2GHZ;
3478
3479         il->iw_mode = NL80211_IFTYPE_STATION;
3480         il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
3481
3482         /* initialize force reset */
3483         il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
3484
3485         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3486                 IL_WARN("Unsupported EEPROM version: 0x%04X\n",
3487                         eeprom->version);
3488                 ret = -EINVAL;
3489                 goto err;
3490         }
3491         ret = il_init_channel_map(il);
3492         if (ret) {
3493                 IL_ERR("initializing regulatory failed: %d\n", ret);
3494                 goto err;
3495         }
3496
3497         /* Set up txpower settings in driver for all channels */
3498         if (il3945_txpower_set_from_eeprom(il)) {
3499                 ret = -EIO;
3500                 goto err_free_channel_map;
3501         }
3502
3503         ret = il_init_geos(il);
3504         if (ret) {
3505                 IL_ERR("initializing geos failed: %d\n", ret);
3506                 goto err_free_channel_map;
3507         }
3508         il3945_init_hw_rates(il, il->ieee_rates);
3509
3510         return 0;
3511
3512 err_free_channel_map:
3513         il_free_channel_map(il);
3514 err:
3515         return ret;
3516 }
3517
3518 #define IL3945_MAX_PROBE_REQUEST        200
3519
3520 static int
3521 il3945_setup_mac(struct il_priv *il)
3522 {
3523         int ret;
3524         struct ieee80211_hw *hw = il->hw;
3525
3526         hw->rate_control_algorithm = "iwl-3945-rs";
3527         hw->sta_data_size = sizeof(struct il3945_sta_priv);
3528         hw->vif_data_size = sizeof(struct il_vif_priv);
3529
3530         /* Tell mac80211 our characteristics */
3531         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
3532         ieee80211_hw_set(hw, SUPPORTS_PS);
3533         ieee80211_hw_set(hw, SIGNAL_DBM);
3534         ieee80211_hw_set(hw, SPECTRUM_MGMT);
3535
3536         hw->wiphy->interface_modes =
3537             BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
3538
3539         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
3540         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
3541                                        REGULATORY_DISABLE_BEACON_HINTS;
3542
3543         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
3544
3545         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3546         /* we create the 802.11 header and a zero-length SSID element */
3547         hw->wiphy->max_scan_ie_len = IL3945_MAX_PROBE_REQUEST - 24 - 2;
3548
3549         /* Default value; 4 EDCA QOS priorities */
3550         hw->queues = 4;
3551
3552         if (il->bands[NL80211_BAND_2GHZ].n_channels)
3553                 il->hw->wiphy->bands[NL80211_BAND_2GHZ] =
3554                     &il->bands[NL80211_BAND_2GHZ];
3555
3556         if (il->bands[NL80211_BAND_5GHZ].n_channels)
3557                 il->hw->wiphy->bands[NL80211_BAND_5GHZ] =
3558                     &il->bands[NL80211_BAND_5GHZ];
3559
3560         il_leds_init(il);
3561
3562         wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
3563
3564         ret = ieee80211_register_hw(il->hw);
3565         if (ret) {
3566                 IL_ERR("Failed to register hw (error %d)\n", ret);
3567                 return ret;
3568         }
3569         il->mac80211_registered = 1;
3570
3571         return 0;
3572 }
3573
3574 static int
3575 il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3576 {
3577         int err = 0;
3578         struct il_priv *il;
3579         struct ieee80211_hw *hw;
3580         struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
3581         struct il3945_eeprom *eeprom;
3582         unsigned long flags;
3583
3584         /***********************
3585          * 1. Allocating HW data
3586          * ********************/
3587
3588         hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il3945_mac_ops);
3589         if (!hw) {
3590                 err = -ENOMEM;
3591                 goto out;
3592         }
3593         il = hw->priv;
3594         il->hw = hw;
3595         SET_IEEE80211_DEV(hw, &pdev->dev);
3596
3597         il->cmd_queue = IL39_CMD_QUEUE_NUM;
3598
3599         D_INFO("*** LOAD DRIVER ***\n");
3600         il->cfg = cfg;
3601         il->ops = &il3945_ops;
3602 #ifdef CONFIG_IWLEGACY_DEBUGFS
3603         il->debugfs_ops = &il3945_debugfs_ops;
3604 #endif
3605         il->pci_dev = pdev;
3606         il->inta_mask = CSR_INI_SET_MASK;
3607
3608         /***************************
3609          * 2. Initializing PCI bus
3610          * *************************/
3611         pci_disable_link_state(pdev,
3612                                PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3613                                PCIE_LINK_STATE_CLKPM);
3614
3615         if (pci_enable_device(pdev)) {
3616                 err = -ENODEV;
3617                 goto out_ieee80211_free_hw;
3618         }
3619
3620         pci_set_master(pdev);
3621
3622         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3623         if (err) {
3624                 IL_WARN("No suitable DMA available.\n");
3625                 goto out_pci_disable_device;
3626         }
3627
3628         pci_set_drvdata(pdev, il);
3629         err = pci_request_regions(pdev, DRV_NAME);
3630         if (err)
3631                 goto out_pci_disable_device;
3632
3633         /***********************
3634          * 3. Read REV Register
3635          * ********************/
3636         il->hw_base = pci_ioremap_bar(pdev, 0);
3637         if (!il->hw_base) {
3638                 err = -ENODEV;
3639                 goto out_pci_release_regions;
3640         }
3641
3642         D_INFO("pci_resource_len = 0x%08llx\n",
3643                (unsigned long long)pci_resource_len(pdev, 0));
3644         D_INFO("pci_resource_base = %p\n", il->hw_base);
3645
3646         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3647          * PCI Tx retries from interfering with C3 CPU state */
3648         pci_write_config_byte(pdev, 0x41, 0x00);
3649
3650         /* these spin locks will be used in apm_init and EEPROM access
3651          * we should init now
3652          */
3653         spin_lock_init(&il->reg_lock);
3654         spin_lock_init(&il->lock);
3655
3656         /*
3657          * stop and reset the on-board processor just in case it is in a
3658          * strange state ... like being left stranded by a primary kernel
3659          * and this is now the kdump kernel trying to start up
3660          */
3661         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3662
3663         /***********************
3664          * 4. Read EEPROM
3665          * ********************/
3666
3667         /* Read the EEPROM */
3668         err = il_eeprom_init(il);
3669         if (err) {
3670                 IL_ERR("Unable to init EEPROM\n");
3671                 goto out_iounmap;
3672         }
3673         /* MAC Address location in EEPROM same for 3945/4965 */
3674         eeprom = (struct il3945_eeprom *)il->eeprom;
3675         D_INFO("MAC address: %pM\n", eeprom->mac_address);
3676         SET_IEEE80211_PERM_ADDR(il->hw, eeprom->mac_address);
3677
3678         /***********************
3679          * 5. Setup HW Constants
3680          * ********************/
3681         /* Device-specific setup */
3682         err = il3945_hw_set_hw_params(il);
3683         if (err) {
3684                 IL_ERR("failed to set hw settings\n");
3685                 goto out_eeprom_free;
3686         }
3687
3688         /***********************
3689          * 6. Setup il
3690          * ********************/
3691
3692         err = il3945_init_drv(il);
3693         if (err) {
3694                 IL_ERR("initializing driver failed\n");
3695                 goto out_unset_hw_params;
3696         }
3697
3698         IL_INFO("Detected Intel Wireless WiFi Link %s\n", il->cfg->name);
3699
3700         /***********************
3701          * 7. Setup Services
3702          * ********************/
3703
3704         spin_lock_irqsave(&il->lock, flags);
3705         il_disable_interrupts(il);
3706         spin_unlock_irqrestore(&il->lock, flags);
3707
3708         pci_enable_msi(il->pci_dev);
3709
3710         err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
3711         if (err) {
3712                 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
3713                 goto out_disable_msi;
3714         }
3715
3716         err = sysfs_create_group(&pdev->dev.kobj, &il3945_attribute_group);
3717         if (err) {
3718                 IL_ERR("failed to create sysfs device attributes\n");
3719                 goto out_release_irq;
3720         }
3721
3722         il_set_rxon_channel(il, &il->bands[NL80211_BAND_2GHZ].channels[5]);
3723         err = il3945_setup_deferred_work(il);
3724         if (err)
3725                 goto out_remove_sysfs;
3726
3727         il3945_setup_handlers(il);
3728         il_power_initialize(il);
3729
3730         /*********************************
3731          * 8. Setup and Register mac80211
3732          * *******************************/
3733
3734         il_enable_interrupts(il);
3735
3736         err = il3945_setup_mac(il);
3737         if (err)
3738                 goto out_destroy_workqueue;
3739
3740         il_dbgfs_register(il, DRV_NAME);
3741
3742         /* Start monitoring the killswitch */
3743         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, 2 * HZ);
3744
3745         return 0;
3746
3747 out_destroy_workqueue:
3748         destroy_workqueue(il->workqueue);
3749         il->workqueue = NULL;
3750 out_remove_sysfs:
3751         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3752 out_release_irq:
3753         free_irq(il->pci_dev->irq, il);
3754 out_disable_msi:
3755         pci_disable_msi(il->pci_dev);
3756         il_free_geos(il);
3757         il_free_channel_map(il);
3758 out_unset_hw_params:
3759         il3945_unset_hw_params(il);
3760 out_eeprom_free:
3761         il_eeprom_free(il);
3762 out_iounmap:
3763         iounmap(il->hw_base);
3764 out_pci_release_regions:
3765         pci_release_regions(pdev);
3766 out_pci_disable_device:
3767         pci_disable_device(pdev);
3768 out_ieee80211_free_hw:
3769         ieee80211_free_hw(il->hw);
3770 out:
3771         return err;
3772 }
3773
3774 static void
3775 il3945_pci_remove(struct pci_dev *pdev)
3776 {
3777         struct il_priv *il = pci_get_drvdata(pdev);
3778         unsigned long flags;
3779
3780         if (!il)
3781                 return;
3782
3783         D_INFO("*** UNLOAD DRIVER ***\n");
3784
3785         il_dbgfs_unregister(il);
3786
3787         set_bit(S_EXIT_PENDING, &il->status);
3788
3789         il_leds_exit(il);
3790
3791         if (il->mac80211_registered) {
3792                 ieee80211_unregister_hw(il->hw);
3793                 il->mac80211_registered = 0;
3794         } else {
3795                 il3945_down(il);
3796         }
3797
3798         /*
3799          * Make sure device is reset to low power before unloading driver.
3800          * This may be redundant with il_down(), but there are paths to
3801          * run il_down() without calling apm_ops.stop(), and there are
3802          * paths to avoid running il_down() at all before leaving driver.
3803          * This (inexpensive) call *makes sure* device is reset.
3804          */
3805         il_apm_stop(il);
3806
3807         /* make sure we flush any pending irq or
3808          * tasklet for the driver
3809          */
3810         spin_lock_irqsave(&il->lock, flags);
3811         il_disable_interrupts(il);
3812         spin_unlock_irqrestore(&il->lock, flags);
3813
3814         il3945_synchronize_irq(il);
3815
3816         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3817
3818         cancel_delayed_work_sync(&il->_3945.rfkill_poll);
3819
3820         il3945_dealloc_ucode_pci(il);
3821
3822         if (il->rxq.bd)
3823                 il3945_rx_queue_free(il, &il->rxq);
3824         il3945_hw_txq_ctx_free(il);
3825
3826         il3945_unset_hw_params(il);
3827
3828         /*netif_stop_queue(dev); */
3829
3830         /* ieee80211_unregister_hw calls il3945_mac_stop, which flushes
3831          * il->workqueue... so we can't take down the workqueue
3832          * until now... */
3833         destroy_workqueue(il->workqueue);
3834         il->workqueue = NULL;
3835
3836         free_irq(pdev->irq, il);
3837         pci_disable_msi(pdev);
3838
3839         iounmap(il->hw_base);
3840         pci_release_regions(pdev);
3841         pci_disable_device(pdev);
3842
3843         il_free_channel_map(il);
3844         il_free_geos(il);
3845         kfree(il->scan_cmd);
3846         dev_kfree_skb(il->beacon_skb);
3847         ieee80211_free_hw(il->hw);
3848 }
3849
3850 /*****************************************************************************
3851  *
3852  * driver and module entry point
3853  *
3854  *****************************************************************************/
3855
3856 static struct pci_driver il3945_driver = {
3857         .name = DRV_NAME,
3858         .id_table = il3945_hw_card_ids,
3859         .probe = il3945_pci_probe,
3860         .remove = il3945_pci_remove,
3861         .driver.pm = IL_LEGACY_PM_OPS,
3862 };
3863
3864 static int __init
3865 il3945_init(void)
3866 {
3867
3868         int ret;
3869         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3870         pr_info(DRV_COPYRIGHT "\n");
3871
3872         /*
3873          * Disabling hardware scan means that mac80211 will perform scans
3874          * "the hard way", rather than using device's scan.
3875          */
3876         if (il3945_mod_params.disable_hw_scan) {
3877                 pr_info("hw_scan is disabled\n");
3878                 il3945_mac_ops.hw_scan = NULL;
3879         }
3880
3881         ret = il3945_rate_control_register();
3882         if (ret) {
3883                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3884                 return ret;
3885         }
3886
3887         ret = pci_register_driver(&il3945_driver);
3888         if (ret) {
3889                 pr_err("Unable to initialize PCI module\n");
3890                 goto error_register;
3891         }
3892
3893         return ret;
3894
3895 error_register:
3896         il3945_rate_control_unregister();
3897         return ret;
3898 }
3899
3900 static void __exit
3901 il3945_exit(void)
3902 {
3903         pci_unregister_driver(&il3945_driver);
3904         il3945_rate_control_unregister();
3905 }
3906
3907 MODULE_FIRMWARE(IL3945_MODULE_FIRMWARE(IL3945_UCODE_API_MAX));
3908
3909 module_param_named(antenna, il3945_mod_params.antenna, int, 0444);
3910 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3911 module_param_named(swcrypto, il3945_mod_params.sw_crypto, int, 0444);
3912 MODULE_PARM_DESC(swcrypto, "using software crypto (default 1 [software])");
3913 module_param_named(disable_hw_scan, il3945_mod_params.disable_hw_scan, int,
3914                    0444);
3915 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
3916 #ifdef CONFIG_IWLEGACY_DEBUG
3917 module_param_named(debug, il_debug_level, uint, 0644);
3918 MODULE_PARM_DESC(debug, "debug output mask");
3919 #endif
3920 module_param_named(fw_restart, il3945_mod_params.restart_fw, int, 0444);
3921 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3922
3923 module_exit(il3945_exit);
3924 module_init(il3945_init);