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