SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwmc3200wifi/rx.c

   1 /*
   2  * Intel Wireless Multicomm 3200 WiFi driver
   3  *
   4  * Copyright (C) 2009 Intel Corporation. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  *   * Redistributions of source code must retain the above copyright
  11  *     notice, this list of conditions and the following disclaimer.
  12  *   * Redistributions in binary form must reproduce the above copyright
  13  *     notice, this list of conditions and the following disclaimer in
  14  *     the documentation and/or other materials provided with the
  15  *     distribution.
  16  *   * Neither the name of Intel Corporation nor the names of its
  17  *     contributors may be used to endorse or promote products derived
  18  *     from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  *
  33  * Intel Corporation <ilw@linux.intel.com>
  34  * Samuel Ortiz <samuel.ortiz@intel.com>
  35  * Zhu Yi <yi.zhu@intel.com>
  36  *
  37  */
  38
  39 #include <linux/kernel.h>
  40 #include <linux/netdevice.h>
  41 #include <linux/sched.h>
  42 #include <linux/etherdevice.h>
  43 #include <linux/wireless.h>
  44 #include <linux/ieee80211.h>
  45 #include <linux/if_arp.h>
  46 #include <linux/list.h>
  47 #include <net/iw_handler.h>
  48
  49 #include "iwm.h"
  50 #include "debug.h"
  51 #include "hal.h"
  52 #include "umac.h"
  53 #include "lmac.h"
  54 #include "commands.h"
  55 #include "rx.h"
  56 #include "cfg80211.h"
  57 #include "eeprom.h"
  58
  59 static int iwm_rx_check_udma_hdr(struct iwm_udma_in_hdr *hdr)
  60 {
  61         if ((le32_to_cpu(hdr->cmd) == UMAC_PAD_TERMINAL) ||
  62             (le32_to_cpu(hdr->size) == UMAC_PAD_TERMINAL))
  63                 return -EINVAL;
  64
  65         return 0;
  66 }
  67
  68 static inline int iwm_rx_resp_size(struct iwm_udma_in_hdr *hdr)
  69 {
  70         return ALIGN(le32_to_cpu(hdr->size) + sizeof(struct iwm_udma_in_hdr),
  71                      16);
  72 }
  73
  74 /*
  75  * Notification handlers:
  76  *
  77  * For every possible notification we can receive from the
  78  * target, we have a handler.
  79  * When we get a target notification, and there is no one
  80  * waiting for it, it's just processed through the rx code
  81  * path:
  82  *
  83  * iwm_rx_handle()
  84  *  -> iwm_rx_handle_umac()
  85  *      -> iwm_rx_handle_wifi()
  86  *          -> iwm_rx_handle_resp()
  87  *              -> iwm_ntf_*()
  88  *
  89  *      OR
  90  *
  91  *      -> iwm_rx_handle_non_wifi()
  92  *
  93  * If there are processes waiting for this notification, then
  94  * iwm_rx_handle_wifi() just wakes those processes up and they
  95  * grab the pending notification.
  96  */
  97 static int iwm_ntf_error(struct iwm_priv *iwm, u8 *buf,
  98                          unsigned long buf_size, struct iwm_wifi_cmd *cmd)
  99 {
 100         struct iwm_umac_notif_error *error;
 101         struct iwm_fw_error_hdr *fw_err;
 102
 103         error = (struct iwm_umac_notif_error *)buf;
 104         fw_err = &error->err;
 105
 106         memcpy(iwm->last_fw_err, fw_err, sizeof(struct iwm_fw_error_hdr));
 107
 108         IWM_ERR(iwm, "%cMAC FW ERROR:\n",
 109          (le32_to_cpu(fw_err->category) == UMAC_SYS_ERR_CAT_LMAC) ? 'L' : 'U');
 110         IWM_ERR(iwm, "\tCategory:    %d\n", le32_to_cpu(fw_err->category));
 111         IWM_ERR(iwm, "\tStatus:      0x%x\n", le32_to_cpu(fw_err->status));
 112         IWM_ERR(iwm, "\tPC:          0x%x\n", le32_to_cpu(fw_err->pc));
 113         IWM_ERR(iwm, "\tblink1:      %d\n", le32_to_cpu(fw_err->blink1));
 114         IWM_ERR(iwm, "\tblink2:      %d\n", le32_to_cpu(fw_err->blink2));
 115         IWM_ERR(iwm, "\tilink1:      %d\n", le32_to_cpu(fw_err->ilink1));
 116         IWM_ERR(iwm, "\tilink2:      %d\n", le32_to_cpu(fw_err->ilink2));
 117         IWM_ERR(iwm, "\tData1:       0x%x\n", le32_to_cpu(fw_err->data1));
 118         IWM_ERR(iwm, "\tData2:       0x%x\n", le32_to_cpu(fw_err->data2));
 119         IWM_ERR(iwm, "\tLine number: %d\n", le32_to_cpu(fw_err->line_num));
 120         IWM_ERR(iwm, "\tUMAC status: 0x%x\n", le32_to_cpu(fw_err->umac_status));
 121         IWM_ERR(iwm, "\tLMAC status: 0x%x\n", le32_to_cpu(fw_err->lmac_status));
 122         IWM_ERR(iwm, "\tSDIO status: 0x%x\n", le32_to_cpu(fw_err->sdio_status));
 123
 124         iwm_resetting(iwm);
 125
 126         return 0;
 127 }
 128
 129 static int iwm_ntf_umac_alive(struct iwm_priv *iwm, u8 *buf,
 130                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 131 {
 132         struct iwm_umac_notif_alive *alive_resp =
 133                         (struct iwm_umac_notif_alive *)(buf);
 134         u16 status = le16_to_cpu(alive_resp->status);
 135
 136         if (status == UMAC_NTFY_ALIVE_STATUS_ERR) {
 137                 IWM_ERR(iwm, "Receive error UMAC_ALIVE\n");
 138                 return -EIO;
 139         }
 140
 141         iwm_tx_credit_init_pools(iwm, alive_resp);
 142
 143         return 0;
 144 }
 145
 146 static int iwm_ntf_init_complete(struct iwm_priv *iwm, u8 *buf,
 147                                  unsigned long buf_size,
 148                                  struct iwm_wifi_cmd *cmd)
 149 {
 150         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 151         struct iwm_umac_notif_init_complete *init_complete =
 152                         (struct iwm_umac_notif_init_complete *)(buf);
 153         u16 status = le16_to_cpu(init_complete->status);
 154         bool blocked = (status == UMAC_NTFY_INIT_COMPLETE_STATUS_ERR);
 155
 156         if (blocked)
 157                 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is on (radio off)\n");
 158         else
 159                 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is off (radio on)\n");
 160
 161         wiphy_rfkill_set_hw_state(wiphy, blocked);
 162
 163         return 0;
 164 }
 165
 166 static int iwm_ntf_tx_credit_update(struct iwm_priv *iwm, u8 *buf,
 167                                     unsigned long buf_size,
 168                                     struct iwm_wifi_cmd *cmd)
 169 {
 170         int pool_nr, total_freed_pages;
 171         unsigned long pool_map;
 172         int i, id;
 173         struct iwm_umac_notif_page_dealloc *dealloc =
 174                         (struct iwm_umac_notif_page_dealloc *)buf;
 175
 176         pool_nr = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_CNT);
 177         pool_map = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_MSK);
 178
 179         IWM_DBG_TX(iwm, DBG, "UMAC dealloc notification: pool nr %d, "
 180                    "update map 0x%lx\n", pool_nr, pool_map);
 181
 182         spin_lock(&iwm->tx_credit.lock);
 183
 184         for (i = 0; i < pool_nr; i++) {
 185                 id = GET_VAL32(dealloc->grp_info[i],
 186                                UMAC_DEALLOC_NTFY_GROUP_NUM);
 187                 if (test_bit(id, &pool_map)) {
 188                         total_freed_pages = GET_VAL32(dealloc->grp_info[i],
 189                                               UMAC_DEALLOC_NTFY_PAGE_CNT);
 190                         iwm_tx_credit_inc(iwm, id, total_freed_pages);
 191                 }
 192         }
 193
 194         spin_unlock(&iwm->tx_credit.lock);
 195
 196         return 0;
 197 }
 198
 199 static int iwm_ntf_umac_reset(struct iwm_priv *iwm, u8 *buf,
 200                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 201 {
 202         IWM_DBG_NTF(iwm, DBG, "UMAC RESET done\n");
 203
 204         return 0;
 205 }
 206
 207 static int iwm_ntf_lmac_version(struct iwm_priv *iwm, u8 *buf,
 208                                 unsigned long buf_size,
 209                                 struct iwm_wifi_cmd *cmd)
 210 {
 211         IWM_DBG_NTF(iwm, INFO, "LMAC Version: %x.%x\n", buf[9], buf[8]);
 212
 213         return 0;
 214 }
 215
 216 static int iwm_ntf_tx(struct iwm_priv *iwm, u8 *buf,
 217                       unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 218 {
 219         struct iwm_lmac_tx_resp *tx_resp;
 220         struct iwm_umac_wifi_in_hdr *hdr;
 221
 222         tx_resp = (struct iwm_lmac_tx_resp *)
 223                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 224         hdr = (struct iwm_umac_wifi_in_hdr *)buf;
 225
 226         IWM_DBG_TX(iwm, DBG, "REPLY_TX, buf size: %lu\n", buf_size);
 227
 228         IWM_DBG_TX(iwm, DBG, "Seqnum: %d\n",
 229                    le16_to_cpu(hdr->sw_hdr.cmd.seq_num));
 230         IWM_DBG_TX(iwm, DBG, "\tFrame cnt: %d\n", tx_resp->frame_cnt);
 231         IWM_DBG_TX(iwm, DBG, "\tRetry cnt: %d\n",
 232                    le16_to_cpu(tx_resp->retry_cnt));
 233         IWM_DBG_TX(iwm, DBG, "\tSeq ctl: %d\n", le16_to_cpu(tx_resp->seq_ctl));
 234         IWM_DBG_TX(iwm, DBG, "\tByte cnt: %d\n",
 235                    le16_to_cpu(tx_resp->byte_cnt));
 236         IWM_DBG_TX(iwm, DBG, "\tStatus: 0x%x\n", le32_to_cpu(tx_resp->status));
 237
 238         return 0;
 239 }
 240
 241
 242 static int iwm_ntf_calib_res(struct iwm_priv *iwm, u8 *buf,
 243                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 244 {
 245         u8 opcode;
 246         u8 *calib_buf;
 247         struct iwm_lmac_calib_hdr *hdr = (struct iwm_lmac_calib_hdr *)
 248                                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 249
 250         opcode = hdr->opcode;
 251
 252         BUG_ON(opcode >= CALIBRATION_CMD_NUM ||
 253                opcode < PHY_CALIBRATE_OPCODES_NUM);
 254
 255         IWM_DBG_NTF(iwm, DBG, "Store calibration result for opcode: %d\n",
 256                     opcode);
 257
 258         buf_size -= sizeof(struct iwm_umac_wifi_in_hdr);
 259         calib_buf = iwm->calib_res[opcode].buf;
 260
 261         if (!calib_buf || (iwm->calib_res[opcode].size < buf_size)) {
 262                 kfree(calib_buf);
 263                 calib_buf = kzalloc(buf_size, GFP_KERNEL);
 264                 if (!calib_buf) {
 265                         IWM_ERR(iwm, "Memory allocation failed: calib_res\n");
 266                         return -ENOMEM;
 267                 }
 268                 iwm->calib_res[opcode].buf = calib_buf;
 269                 iwm->calib_res[opcode].size = buf_size;
 270         }
 271
 272         memcpy(calib_buf, hdr, buf_size);
 273         set_bit(opcode - PHY_CALIBRATE_OPCODES_NUM, &iwm->calib_done_map);
 274
 275         return 0;
 276 }
 277
 278 static int iwm_ntf_calib_complete(struct iwm_priv *iwm, u8 *buf,
 279                                   unsigned long buf_size,
 280                                   struct iwm_wifi_cmd *cmd)
 281 {
 282         IWM_DBG_NTF(iwm, DBG, "Calibration completed\n");
 283
 284         return 0;
 285 }
 286
 287 static int iwm_ntf_calib_cfg(struct iwm_priv *iwm, u8 *buf,
 288                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 289 {
 290         struct iwm_lmac_cal_cfg_resp *cal_resp;
 291
 292         cal_resp = (struct iwm_lmac_cal_cfg_resp *)
 293                         (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 294
 295         IWM_DBG_NTF(iwm, DBG, "Calibration CFG command status: %d\n",
 296                     le32_to_cpu(cal_resp->status));
 297
 298         return 0;
 299 }
 300
 301 static int iwm_ntf_wifi_status(struct iwm_priv *iwm, u8 *buf,
 302                                unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 303 {
 304         struct iwm_umac_notif_wifi_status *status =
 305                 (struct iwm_umac_notif_wifi_status *)buf;
 306
 307         iwm->core_enabled |= le16_to_cpu(status->status);
 308
 309         return 0;
 310 }
 311
 312 static struct iwm_rx_ticket_node *
 313 iwm_rx_ticket_node_alloc(struct iwm_priv *iwm, struct iwm_rx_ticket *ticket)
 314 {
 315         struct iwm_rx_ticket_node *ticket_node;
 316
 317         ticket_node = kzalloc(sizeof(struct iwm_rx_ticket_node), GFP_KERNEL);
 318         if (!ticket_node) {
 319                 IWM_ERR(iwm, "Couldn't allocate ticket node\n");
 320                 return ERR_PTR(-ENOMEM);
 321         }
 322
 323         ticket_node->ticket = kzalloc(sizeof(struct iwm_rx_ticket), GFP_KERNEL);
 324         if (!ticket_node->ticket) {
 325                 IWM_ERR(iwm, "Couldn't allocate RX ticket\n");
 326                 kfree(ticket_node);
 327                 return ERR_PTR(-ENOMEM);
 328         }
 329
 330         memcpy(ticket_node->ticket, ticket, sizeof(struct iwm_rx_ticket));
 331         INIT_LIST_HEAD(&ticket_node->node);
 332
 333         return ticket_node;
 334 }
 335
 336 static void iwm_rx_ticket_node_free(struct iwm_rx_ticket_node *ticket_node)
 337 {
 338         kfree(ticket_node->ticket);
 339         kfree(ticket_node);
 340 }
 341
 342 static struct iwm_rx_packet *iwm_rx_packet_get(struct iwm_priv *iwm, u16 id)
 343 {
 344         u8 id_hash = IWM_RX_ID_GET_HASH(id);
 345         struct iwm_rx_packet *packet;
 346
 347         spin_lock(&iwm->packet_lock[id_hash]);
 348         list_for_each_entry(packet, &iwm->rx_packets[id_hash], node)
 349                 if (packet->id == id) {
 350                         list_del(&packet->node);
 351                         spin_unlock(&iwm->packet_lock[id_hash]);
 352                         return packet;
 353                 }
 354
 355         spin_unlock(&iwm->packet_lock[id_hash]);
 356         return NULL;
 357 }
 358
 359 static struct iwm_rx_packet *iwm_rx_packet_alloc(struct iwm_priv *iwm, u8 *buf,
 360                                                  u32 size, u16 id)
 361 {
 362         struct iwm_rx_packet *packet;
 363
 364         packet = kzalloc(sizeof(struct iwm_rx_packet), GFP_KERNEL);
 365         if (!packet) {
 366                 IWM_ERR(iwm, "Couldn't allocate packet\n");
 367                 return ERR_PTR(-ENOMEM);
 368         }
 369
 370         packet->skb = dev_alloc_skb(size);
 371         if (!packet->skb) {
 372                 IWM_ERR(iwm, "Couldn't allocate packet SKB\n");
 373                 kfree(packet);
 374                 return ERR_PTR(-ENOMEM);
 375         }
 376
 377         packet->pkt_size = size;
 378
 379         skb_put(packet->skb, size);
 380         memcpy(packet->skb->data, buf, size);
 381         INIT_LIST_HEAD(&packet->node);
 382         packet->id = id;
 383
 384         return packet;
 385 }
 386
 387 void iwm_rx_free(struct iwm_priv *iwm)
 388 {
 389         struct iwm_rx_ticket_node *ticket, *nt;
 390         struct iwm_rx_packet *packet, *np;
 391         int i;
 392
 393         spin_lock(&iwm->ticket_lock);
 394         list_for_each_entry_safe(ticket, nt, &iwm->rx_tickets, node) {
 395                 list_del(&ticket->node);
 396                 iwm_rx_ticket_node_free(ticket);
 397         }
 398         spin_unlock(&iwm->ticket_lock);
 399
 400         for (i = 0; i < IWM_RX_ID_HASH; i++) {
 401                 spin_lock(&iwm->packet_lock[i]);
 402                 list_for_each_entry_safe(packet, np, &iwm->rx_packets[i],
 403                                          node) {
 404                         list_del(&packet->node);
 405                         kfree_skb(packet->skb);
 406                         kfree(packet);
 407                 }
 408                 spin_unlock(&iwm->packet_lock[i]);
 409         }
 410 }
 411
 412 static int iwm_ntf_rx_ticket(struct iwm_priv *iwm, u8 *buf,
 413                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 414 {
 415         struct iwm_umac_notif_rx_ticket *ntf_rx_ticket =
 416                 (struct iwm_umac_notif_rx_ticket *)buf;
 417         struct iwm_rx_ticket *ticket =
 418                 (struct iwm_rx_ticket *)ntf_rx_ticket->tickets;
 419         int i, schedule_rx = 0;
 420
 421         for (i = 0; i < ntf_rx_ticket->num_tickets; i++) {
 422                 struct iwm_rx_ticket_node *ticket_node;
 423
 424                 switch (le16_to_cpu(ticket->action)) {
 425                 case IWM_RX_TICKET_RELEASE:
 426                 case IWM_RX_TICKET_DROP:
 427                         /* We can push the packet to the stack */
 428                         ticket_node = iwm_rx_ticket_node_alloc(iwm, ticket);
 429                         if (IS_ERR(ticket_node))
 430                                 return PTR_ERR(ticket_node);
 431
 432                         IWM_DBG_RX(iwm, DBG, "TICKET %s(%d)\n",
 433                                    ticket->action ==  IWM_RX_TICKET_RELEASE ?
 434                                    "RELEASE" : "DROP",
 435                                    ticket->id);
 436                         spin_lock(&iwm->ticket_lock);
 437                         list_add_tail(&ticket_node->node, &iwm->rx_tickets);
 438                         spin_unlock(&iwm->ticket_lock);
 439
 440                         /*
 441                          * We received an Rx ticket, most likely there's
 442                          * a packet pending for it, it's not worth going
 443                          * through the packet hash list to double check.
 444                          * Let's just fire the rx worker..
 445                          */
 446                         schedule_rx = 1;
 447
 448                         break;
 449
 450                 default:
 451                         IWM_ERR(iwm, "Invalid RX ticket action: 0x%x\n",
 452                                 ticket->action);
 453                 }
 454
 455                 ticket++;
 456         }
 457
 458         if (schedule_rx)
 459                 queue_work(iwm->rx_wq, &iwm->rx_worker);
 460
 461         return 0;
 462 }
 463
 464 static int iwm_ntf_rx_packet(struct iwm_priv *iwm, u8 *buf,
 465                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 466 {
 467         struct iwm_umac_wifi_in_hdr *wifi_hdr;
 468         struct iwm_rx_packet *packet;
 469         u16 id, buf_offset;
 470         u32 packet_size;
 471         u8 id_hash;
 472
 473         IWM_DBG_RX(iwm, DBG, "\n");
 474
 475         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
 476         id = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
 477         buf_offset = sizeof(struct iwm_umac_wifi_in_hdr);
 478         packet_size = buf_size - sizeof(struct iwm_umac_wifi_in_hdr);
 479
 480         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, seqnum: %d, packet size: %d\n",
 481                    wifi_hdr->sw_hdr.cmd.cmd, id, packet_size);
 482         IWM_DBG_RX(iwm, DBG, "Packet id: %d\n", id);
 483         IWM_HEXDUMP(iwm, DBG, RX, "PACKET: ", buf + buf_offset, packet_size);
 484
 485         packet = iwm_rx_packet_alloc(iwm, buf + buf_offset, packet_size, id);
 486         if (IS_ERR(packet))
 487                 return PTR_ERR(packet);
 488
 489         id_hash = IWM_RX_ID_GET_HASH(id);
 490         spin_lock(&iwm->packet_lock[id_hash]);
 491         list_add_tail(&packet->node, &iwm->rx_packets[id_hash]);
 492         spin_unlock(&iwm->packet_lock[id_hash]);
 493
 494         /* We might (unlikely) have received the packet _after_ the ticket */
 495         queue_work(iwm->rx_wq, &iwm->rx_worker);
 496
 497         return 0;
 498 }
 499
 500 /* MLME handlers */
 501 static int iwm_mlme_assoc_start(struct iwm_priv *iwm, u8 *buf,
 502                                 unsigned long buf_size,
 503                                 struct iwm_wifi_cmd *cmd)
 504 {
 505         struct iwm_umac_notif_assoc_start *start;
 506
 507         start = (struct iwm_umac_notif_assoc_start *)buf;
 508
 509         IWM_DBG_MLME(iwm, INFO, "Association with %pM Started, reason: %d\n",
 510                      start->bssid, le32_to_cpu(start->roam_reason));
 511
 512         wake_up_interruptible(&iwm->mlme_queue);
 513
 514         return 0;
 515 }
 516
 517 static u8 iwm_is_open_wep_profile(struct iwm_priv *iwm)
 518 {
 519         if ((iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_40 ||
 520              iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_104) &&
 521             (iwm->umac_profile->sec.ucast_cipher ==
 522              iwm->umac_profile->sec.mcast_cipher) &&
 523             (iwm->umac_profile->sec.auth_type == UMAC_AUTH_TYPE_OPEN))
 524                return 1;
 525
 526        return 0;
 527 }
 528
 529 static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
 530                                    unsigned long buf_size,
 531                                    struct iwm_wifi_cmd *cmd)
 532 {
 533         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 534         struct ieee80211_channel *chan;
 535         struct iwm_umac_notif_assoc_complete *complete =
 536                 (struct iwm_umac_notif_assoc_complete *)buf;
 537
 538         IWM_DBG_MLME(iwm, INFO, "Association with %pM completed, status: %d\n",
 539                      complete->bssid, complete->status);
 540
 541         switch (le32_to_cpu(complete->status)) {
 542         case UMAC_ASSOC_COMPLETE_SUCCESS:
 543                 chan = ieee80211_get_channel(wiphy,
 544                         ieee80211_channel_to_frequency(complete->channel));
 545                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
 546                         /* Associated to a unallowed channel, disassociate. */
 547                         __iwm_invalidate_mlme_profile(iwm);
 548                         IWM_WARN(iwm, "Couldn't associate with %pM due to "
 549                                  "channel %d is disabled. Check your local "
 550                                  "regulatory setting.\n",
 551                                  complete->bssid, complete->channel);
 552                         goto failure;
 553                 }
 554
 555                 set_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 556                 memcpy(iwm->bssid, complete->bssid, ETH_ALEN);
 557                 iwm->channel = complete->channel;
 558
 559                 /* Internal roaming state, avoid notifying SME. */
 560                 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
 561                     && iwm->conf.mode == UMAC_MODE_BSS) {
 562                         cancel_delayed_work(&iwm->disconnect);
 563                         cfg80211_roamed(iwm_to_ndev(iwm),
 564                                         complete->bssid,
 565                                         iwm->req_ie, iwm->req_ie_len,
 566                                         iwm->resp_ie, iwm->resp_ie_len,
 567                                         GFP_KERNEL);
 568                         break;
 569                 }
 570
 571                 iwm_link_on(iwm);
 572
 573                 if (iwm->conf.mode == UMAC_MODE_IBSS)
 574                         goto ibss;
 575
 576                 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
 577                         cfg80211_connect_result(iwm_to_ndev(iwm),
 578                                                 complete->bssid,
 579                                                 iwm->req_ie, iwm->req_ie_len,
 580                                                 iwm->resp_ie, iwm->resp_ie_len,
 581                                                 WLAN_STATUS_SUCCESS,
 582                                                 GFP_KERNEL);
 583                 else
 584                         cfg80211_roamed(iwm_to_ndev(iwm),
 585                                         complete->bssid,
 586                                         iwm->req_ie, iwm->req_ie_len,
 587                                         iwm->resp_ie, iwm->resp_ie_len,
 588                                         GFP_KERNEL);
 589                 break;
 590         case UMAC_ASSOC_COMPLETE_FAILURE:
 591  failure:
 592                 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 593                 memset(iwm->bssid, 0, ETH_ALEN);
 594                 iwm->channel = 0;
 595
 596                 /* Internal roaming state, avoid notifying SME. */
 597                 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
 598                     && iwm->conf.mode == UMAC_MODE_BSS) {
 599                         cancel_delayed_work(&iwm->disconnect);
 600                         break;
 601                 }
 602
 603                 iwm_link_off(iwm);
 604
 605                 if (iwm->conf.mode == UMAC_MODE_IBSS)
 606                         goto ibss;
 607
 608                 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
 609                         if (!iwm_is_open_wep_profile(iwm)) {
 610                                 cfg80211_connect_result(iwm_to_ndev(iwm),
 611                                                complete->bssid,
 612                                                NULL, 0, NULL, 0,
 613                                                WLAN_STATUS_UNSPECIFIED_FAILURE,
 614                                                GFP_KERNEL);
 615                         } else {
 616                                 /* Let's try shared WEP auth */
 617                                 IWM_ERR(iwm, "Trying WEP shared auth\n");
 618                                 schedule_work(&iwm->auth_retry_worker);
 619                         }
 620                 else
 621                         cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0,
 622                                               GFP_KERNEL);
 623                 break;
 624         default:
 625                 break;
 626         }
 627
 628         clear_bit(IWM_STATUS_RESETTING, &iwm->status);
 629         return 0;
 630
 631  ibss:
 632         cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL);
 633         clear_bit(IWM_STATUS_RESETTING, &iwm->status);
 634         return 0;
 635 }
 636
 637 static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
 638                                        unsigned long buf_size,
 639                                        struct iwm_wifi_cmd *cmd)
 640 {
 641         struct iwm_umac_notif_profile_invalidate *invalid;
 642         u32 reason;
 643
 644         invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
 645         reason = le32_to_cpu(invalid->reason);
 646
 647         IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n", reason);
 648
 649         if (reason != UMAC_PROFILE_INVALID_REQUEST &&
 650             test_bit(IWM_STATUS_SME_CONNECTING, &iwm->status))
 651                 cfg80211_connect_result(iwm_to_ndev(iwm), NULL, NULL, 0, NULL,
 652                                         0, WLAN_STATUS_UNSPECIFIED_FAILURE,
 653                                         GFP_KERNEL);
 654
 655         clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status);
 656         clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 657
 658         iwm->umac_profile_active = 0;
 659         memset(iwm->bssid, 0, ETH_ALEN);
 660         iwm->channel = 0;
 661
 662         iwm_link_off(iwm);
 663
 664         wake_up_interruptible(&iwm->mlme_queue);
 665
 666         return 0;
 667 }
 668
 669 #define IWM_DISCONNECT_INTERVAL (5 * HZ)
 670
 671 static int iwm_mlme_connection_terminated(struct iwm_priv *iwm, u8 *buf,
 672                                           unsigned long buf_size,
 673                                           struct iwm_wifi_cmd *cmd)
 674 {
 675         IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
 676
 677         schedule_delayed_work(&iwm->disconnect, IWM_DISCONNECT_INTERVAL);
 678
 679         return 0;
 680 }
 681
 682 static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf,
 683                                   unsigned long buf_size,
 684                                   struct iwm_wifi_cmd *cmd)
 685 {
 686         int ret;
 687         struct iwm_umac_notif_scan_complete *scan_complete =
 688                 (struct iwm_umac_notif_scan_complete *)buf;
 689         u32 result = le32_to_cpu(scan_complete->result);
 690
 691         IWM_DBG_MLME(iwm, INFO, "type:0x%x result:0x%x seq:%d\n",
 692                      le32_to_cpu(scan_complete->type),
 693                      le32_to_cpu(scan_complete->result),
 694                      scan_complete->seq_num);
 695
 696         if (!test_and_clear_bit(IWM_STATUS_SCANNING, &iwm->status)) {
 697                 IWM_ERR(iwm, "Scan complete while device not scanning\n");
 698                 return -EIO;
 699         }
 700         if (!iwm->scan_request)
 701                 return 0;
 702
 703         ret = iwm_cfg80211_inform_bss(iwm);
 704
 705         cfg80211_scan_done(iwm->scan_request,
 706                            (result & UMAC_SCAN_RESULT_ABORTED) ? 1 : !!ret);
 707         iwm->scan_request = NULL;
 708
 709         return ret;
 710 }
 711
 712 static int iwm_mlme_update_sta_table(struct iwm_priv *iwm, u8 *buf,
 713                                      unsigned long buf_size,
 714                                      struct iwm_wifi_cmd *cmd)
 715 {
 716         struct iwm_umac_notif_sta_info *umac_sta =
 717                         (struct iwm_umac_notif_sta_info *)buf;
 718         struct iwm_sta_info *sta;
 719         int i;
 720
 721         switch (le32_to_cpu(umac_sta->opcode)) {
 722         case UMAC_OPCODE_ADD_MODIFY:
 723                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 724
 725                 IWM_DBG_MLME(iwm, INFO, "%s STA: ID = %d, Color = %d, "
 726                              "addr = %pM, qos = %d\n",
 727                              sta->valid ? "Modify" : "Add",
 728                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 729                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 730                              umac_sta->mac_addr,
 731                              umac_sta->flags & UMAC_STA_FLAG_QOS);
 732
 733                 sta->valid = 1;
 734                 sta->qos = umac_sta->flags & UMAC_STA_FLAG_QOS;
 735                 sta->color = GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR);
 736                 memcpy(sta->addr, umac_sta->mac_addr, ETH_ALEN);
 737                 break;
 738         case UMAC_OPCODE_REMOVE:
 739                 IWM_DBG_MLME(iwm, INFO, "Remove STA: ID = %d, Color = %d, "
 740                              "addr = %pM\n",
 741                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 742                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 743                              umac_sta->mac_addr);
 744
 745                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 746
 747                 if (!memcmp(sta->addr, umac_sta->mac_addr, ETH_ALEN))
 748                         sta->valid = 0;
 749
 750                 break;
 751         case UMAC_OPCODE_CLEAR_ALL:
 752                 for (i = 0; i < IWM_STA_TABLE_NUM; i++)
 753                         iwm->sta_table[i].valid = 0;
 754
 755                 break;
 756         default:
 757                 break;
 758         }
 759
 760         return 0;
 761 }
 762
 763 static int iwm_mlme_medium_lost(struct iwm_priv *iwm, u8 *buf,
 764                                 unsigned long buf_size,
 765                                 struct iwm_wifi_cmd *cmd)
 766 {
 767         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 768
 769         IWM_DBG_NTF(iwm, DBG, "WiFi/WiMax coexistence radio is OFF\n");
 770
 771         wiphy_rfkill_set_hw_state(wiphy, true);
 772
 773         return 0;
 774 }
 775
 776 static int iwm_mlme_update_bss_table(struct iwm_priv *iwm, u8 *buf,
 777                                      unsigned long buf_size,
 778                                      struct iwm_wifi_cmd *cmd)
 779 {
 780         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 781         struct ieee80211_mgmt *mgmt;
 782         struct iwm_umac_notif_bss_info *umac_bss =
 783                         (struct iwm_umac_notif_bss_info *)buf;
 784         struct ieee80211_channel *channel;
 785         struct ieee80211_supported_band *band;
 786         struct iwm_bss_info *bss;
 787         s32 signal;
 788         int freq;
 789         u16 frame_len = le16_to_cpu(umac_bss->frame_len);
 790         size_t bss_len = sizeof(struct iwm_umac_notif_bss_info) + frame_len;
 791
 792         mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf);
 793
 794         IWM_DBG_MLME(iwm, DBG, "New BSS info entry: %pM\n", mgmt->bssid);
 795         IWM_DBG_MLME(iwm, DBG, "\tType: 0x%x\n", le32_to_cpu(umac_bss->type));
 796         IWM_DBG_MLME(iwm, DBG, "\tTimestamp: %d\n",
 797                      le32_to_cpu(umac_bss->timestamp));
 798         IWM_DBG_MLME(iwm, DBG, "\tTable Index: %d\n",
 799                      le16_to_cpu(umac_bss->table_idx));
 800         IWM_DBG_MLME(iwm, DBG, "\tBand: %d\n", umac_bss->band);
 801         IWM_DBG_MLME(iwm, DBG, "\tChannel: %d\n", umac_bss->channel);
 802         IWM_DBG_MLME(iwm, DBG, "\tRSSI: %d\n", umac_bss->rssi);
 803         IWM_DBG_MLME(iwm, DBG, "\tFrame Length: %d\n", frame_len);
 804
 805         list_for_each_entry(bss, &iwm->bss_list, node)
 806                 if (bss->bss->table_idx == umac_bss->table_idx)
 807                         break;
 808
 809         if (&bss->node != &iwm->bss_list) {
 810                 /* Remove the old BSS entry, we will add it back later. */
 811                 list_del(&bss->node);
 812                 kfree(bss->bss);
 813         } else {
 814                 /* New BSS entry */
 815
 816                 bss = kzalloc(sizeof(struct iwm_bss_info), GFP_KERNEL);
 817                 if (!bss) {
 818                         IWM_ERR(iwm, "Couldn't allocate bss_info\n");
 819                         return -ENOMEM;
 820                 }
 821         }
 822
 823         bss->bss = kzalloc(bss_len, GFP_KERNEL);
 824         if (!bss->bss) {
 825                 kfree(bss);
 826                 IWM_ERR(iwm, "Couldn't allocate bss\n");
 827                 return -ENOMEM;
 828         }
 829
 830         INIT_LIST_HEAD(&bss->node);
 831         memcpy(bss->bss, umac_bss, bss_len);
 832
 833         if (umac_bss->band == UMAC_BAND_2GHZ)
 834                 band = wiphy->bands[IEEE80211_BAND_2GHZ];
 835         else if (umac_bss->band == UMAC_BAND_5GHZ)
 836                 band = wiphy->bands[IEEE80211_BAND_5GHZ];
 837         else {
 838                 IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band);
 839                 goto err;
 840         }
 841
 842         freq = ieee80211_channel_to_frequency(umac_bss->channel);
 843         channel = ieee80211_get_channel(wiphy, freq);
 844         signal = umac_bss->rssi * 100;
 845
 846         bss->cfg_bss = cfg80211_inform_bss_frame(wiphy, channel,
 847                                                  mgmt, frame_len,
 848                                                  signal, GFP_KERNEL);
 849         if (!bss->cfg_bss)
 850                 goto err;
 851
 852         list_add_tail(&bss->node, &iwm->bss_list);
 853
 854         return 0;
 855  err:
 856         kfree(bss->bss);
 857         kfree(bss);
 858
 859         return -EINVAL;
 860 }
 861
 862 static int iwm_mlme_remove_bss(struct iwm_priv *iwm, u8 *buf,
 863                                unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 864 {
 865         struct iwm_umac_notif_bss_removed *bss_rm =
 866                 (struct iwm_umac_notif_bss_removed *)buf;
 867         struct iwm_bss_info *bss, *next;
 868         u16 table_idx;
 869         int i;
 870
 871         for (i = 0; i < le32_to_cpu(bss_rm->count); i++) {
 872                 table_idx = le16_to_cpu(bss_rm->entries[i]) &
 873                             IWM_BSS_REMOVE_INDEX_MSK;
 874                 list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
 875                         if (bss->bss->table_idx == cpu_to_le16(table_idx)) {
 876                                 struct ieee80211_mgmt *mgmt;
 877
 878                                 mgmt = (struct ieee80211_mgmt *)
 879                                         (bss->bss->frame_buf);
 880                                 IWM_DBG_MLME(iwm, ERR, "BSS removed: %pM\n",
 881                                              mgmt->bssid);
 882                                 list_del(&bss->node);
 883                                 kfree(bss->bss);
 884                                 kfree(bss);
 885                         }
 886         }
 887
 888         return 0;
 889 }
 890
 891 static int iwm_mlme_mgt_frame(struct iwm_priv *iwm, u8 *buf,
 892                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 893 {
 894         struct iwm_umac_notif_mgt_frame *mgt_frame =
 895                         (struct iwm_umac_notif_mgt_frame *)buf;
 896         struct ieee80211_mgmt *mgt = (struct ieee80211_mgmt *)mgt_frame->frame;
 897
 898         IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame,
 899                     le16_to_cpu(mgt_frame->len));
 900
 901         if (ieee80211_is_assoc_req(mgt->frame_control)) {
 902                 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
 903                                   - offsetof(struct ieee80211_mgmt,
 904                                              u.assoc_req.variable);
 905                 kfree(iwm->req_ie);
 906                 iwm->req_ie = kmemdup(mgt->u.assoc_req.variable,
 907                                       iwm->req_ie_len, GFP_KERNEL);
 908         } else if (ieee80211_is_reassoc_req(mgt->frame_control)) {
 909                 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
 910                                   - offsetof(struct ieee80211_mgmt,
 911                                              u.reassoc_req.variable);
 912                 kfree(iwm->req_ie);
 913                 iwm->req_ie = kmemdup(mgt->u.reassoc_req.variable,
 914                                       iwm->req_ie_len, GFP_KERNEL);
 915         } else if (ieee80211_is_assoc_resp(mgt->frame_control)) {
 916                 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
 917                                    - offsetof(struct ieee80211_mgmt,
 918                                               u.assoc_resp.variable);
 919                 kfree(iwm->resp_ie);
 920                 iwm->resp_ie = kmemdup(mgt->u.assoc_resp.variable,
 921                                        iwm->resp_ie_len, GFP_KERNEL);
 922         } else if (ieee80211_is_reassoc_resp(mgt->frame_control)) {
 923                 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
 924                                    - offsetof(struct ieee80211_mgmt,
 925                                               u.reassoc_resp.variable);
 926                 kfree(iwm->resp_ie);
 927                 iwm->resp_ie = kmemdup(mgt->u.reassoc_resp.variable,
 928                                        iwm->resp_ie_len, GFP_KERNEL);
 929         } else {
 930                 IWM_ERR(iwm, "Unsupported management frame: 0x%x",
 931                         le16_to_cpu(mgt->frame_control));
 932                 return 0;
 933         }
 934
 935         return 0;
 936 }
 937
 938 static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf,
 939                         unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 940 {
 941         struct iwm_umac_notif_wifi_if *notif =
 942                 (struct iwm_umac_notif_wifi_if *)buf;
 943
 944         switch (notif->status) {
 945         case WIFI_IF_NTFY_ASSOC_START:
 946                 return iwm_mlme_assoc_start(iwm, buf, buf_size, cmd);
 947         case WIFI_IF_NTFY_ASSOC_COMPLETE:
 948                 return iwm_mlme_assoc_complete(iwm, buf, buf_size, cmd);
 949         case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE:
 950                 return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd);
 951         case WIFI_IF_NTFY_CONNECTION_TERMINATED:
 952                 return iwm_mlme_connection_terminated(iwm, buf, buf_size, cmd);
 953         case WIFI_IF_NTFY_SCAN_COMPLETE:
 954                 return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd);
 955         case WIFI_IF_NTFY_STA_TABLE_CHANGE:
 956                 return iwm_mlme_update_sta_table(iwm, buf, buf_size, cmd);
 957         case WIFI_IF_NTFY_EXTENDED_IE_REQUIRED:
 958                 IWM_DBG_MLME(iwm, DBG, "Extended IE required\n");
 959                 break;
 960         case WIFI_IF_NTFY_RADIO_PREEMPTION:
 961                 return iwm_mlme_medium_lost(iwm, buf, buf_size, cmd);
 962         case WIFI_IF_NTFY_BSS_TRK_TABLE_CHANGED:
 963                 return iwm_mlme_update_bss_table(iwm, buf, buf_size, cmd);
 964         case WIFI_IF_NTFY_BSS_TRK_ENTRIES_REMOVED:
 965                 return iwm_mlme_remove_bss(iwm, buf, buf_size, cmd);
 966                 break;
 967         case WIFI_IF_NTFY_MGMT_FRAME:
 968                 return iwm_mlme_mgt_frame(iwm, buf, buf_size, cmd);
 969         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_START:
 970         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_COMPLETE:
 971         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_START:
 972         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_RESULT:
 973         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_START:
 974         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_COMPLETE:
 975         case WIFI_DBG_IF_NTFY_CNCT_ATC_START:
 976         case WIFI_DBG_IF_NTFY_COEX_NOTIFICATION:
 977         case WIFI_DBG_IF_NTFY_COEX_HANDLE_ENVELOP:
 978         case WIFI_DBG_IF_NTFY_COEX_HANDLE_RELEASE_ENVELOP:
 979                 IWM_DBG_MLME(iwm, DBG, "MLME debug notification: 0x%x\n",
 980                              notif->status);
 981                 break;
 982         default:
 983                 IWM_ERR(iwm, "Unhandled notification: 0x%x\n", notif->status);
 984                 break;
 985         }
 986
 987         return 0;
 988 }
 989
 990 #define IWM_STATS_UPDATE_INTERVAL               (2 * HZ)
 991
 992 static int iwm_ntf_statistics(struct iwm_priv *iwm, u8 *buf,
 993                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 994 {
 995         struct iwm_umac_notif_stats *stats = (struct iwm_umac_notif_stats *)buf;
 996         struct iw_statistics *wstats = &iwm->wstats;
 997         u16 max_rate = 0;
 998         int i;
 999
1000         IWM_DBG_MLME(iwm, DBG, "Statistics notification received\n");
1001
1002         if (test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) {
1003                 for (i = 0; i < UMAC_NTF_RATE_SAMPLE_NR; i++) {
1004                         max_rate = max_t(u16, max_rate,
1005                                          max(le16_to_cpu(stats->tx_rate[i]),
1006                                              le16_to_cpu(stats->rx_rate[i])));
1007                 }
1008                 /* UMAC passes rate info multiplies by 2 */
1009                 iwm->rate = max_rate >> 1;
1010         }
1011         iwm->txpower = le32_to_cpu(stats->tx_power);
1012
1013         wstats->status = 0;
1014
1015         wstats->discard.nwid = le32_to_cpu(stats->rx_drop_other_bssid);
1016         wstats->discard.code = le32_to_cpu(stats->rx_drop_decode);
1017         wstats->discard.fragment = le32_to_cpu(stats->rx_drop_reassembly);
1018         wstats->discard.retries = le32_to_cpu(stats->tx_drop_max_retry);
1019
1020         wstats->miss.beacon = le32_to_cpu(stats->missed_beacons);
1021
1022         /* according to cfg80211 */
1023         if (stats->rssi_dbm < -110)
1024                 wstats->qual.qual = 0;
1025         else if (stats->rssi_dbm > -40)
1026                 wstats->qual.qual = 70;
1027         else
1028                 wstats->qual.qual = stats->rssi_dbm + 110;
1029
1030         wstats->qual.level = stats->rssi_dbm;
1031         wstats->qual.noise = stats->noise_dbm;
1032         wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
1033
1034         schedule_delayed_work(&iwm->stats_request, IWM_STATS_UPDATE_INTERVAL);
1035
1036         mod_timer(&iwm->watchdog, round_jiffies(jiffies + IWM_WATCHDOG_PERIOD));
1037
1038         return 0;
1039 }
1040
1041 static int iwm_ntf_eeprom_proxy(struct iwm_priv *iwm, u8 *buf,
1042                                 unsigned long buf_size,
1043                                 struct iwm_wifi_cmd *cmd)
1044 {
1045         struct iwm_umac_cmd_eeprom_proxy *eeprom_proxy =
1046                 (struct iwm_umac_cmd_eeprom_proxy *)
1047                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1048         struct iwm_umac_cmd_eeprom_proxy_hdr *hdr = &eeprom_proxy->hdr;
1049         u32 hdr_offset = le32_to_cpu(hdr->offset);
1050         u32 hdr_len = le32_to_cpu(hdr->len);
1051         u32 hdr_type = le32_to_cpu(hdr->type);
1052
1053         IWM_DBG_NTF(iwm, DBG, "type: 0x%x, len: %d, offset: 0x%x\n",
1054                     hdr_type, hdr_len, hdr_offset);
1055
1056         if ((hdr_offset + hdr_len) > IWM_EEPROM_LEN)
1057                 return -EINVAL;
1058
1059         switch (hdr_type) {
1060         case IWM_UMAC_CMD_EEPROM_TYPE_READ:
1061                 memcpy(iwm->eeprom + hdr_offset, eeprom_proxy->buf, hdr_len);
1062                 break;
1063         case IWM_UMAC_CMD_EEPROM_TYPE_WRITE:
1064         default:
1065                 return -ENOTSUPP;
1066         }
1067
1068         return 0;
1069 }
1070
1071 static int iwm_ntf_channel_info_list(struct iwm_priv *iwm, u8 *buf,
1072                                      unsigned long buf_size,
1073                                      struct iwm_wifi_cmd *cmd)
1074 {
1075         struct iwm_umac_cmd_get_channel_list *ch_list =
1076                         (struct iwm_umac_cmd_get_channel_list *)
1077                         (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1078         struct wiphy *wiphy = iwm_to_wiphy(iwm);
1079         struct ieee80211_supported_band *band;
1080         int i;
1081
1082         band = wiphy->bands[IEEE80211_BAND_2GHZ];
1083
1084         for (i = 0; i < band->n_channels; i++) {
1085                 unsigned long ch_mask_0 =
1086                         le32_to_cpu(ch_list->ch[0].channels_mask);
1087                 unsigned long ch_mask_2 =
1088                         le32_to_cpu(ch_list->ch[2].channels_mask);
1089
1090                 if (!test_bit(i, &ch_mask_0))
1091                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1092
1093                 if (!test_bit(i, &ch_mask_2))
1094                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1095         }
1096
1097         band = wiphy->bands[IEEE80211_BAND_5GHZ];
1098
1099         for (i = 0; i < min(band->n_channels, 32); i++) {
1100                 unsigned long ch_mask_1 =
1101                         le32_to_cpu(ch_list->ch[1].channels_mask);
1102                 unsigned long ch_mask_3 =
1103                         le32_to_cpu(ch_list->ch[3].channels_mask);
1104
1105                 if (!test_bit(i, &ch_mask_1))
1106                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1107
1108                 if (!test_bit(i, &ch_mask_3))
1109                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1110         }
1111
1112         return 0;
1113 }
1114
1115 static int iwm_ntf_stop_resume_tx(struct iwm_priv *iwm, u8 *buf,
1116                                   unsigned long buf_size,
1117                                   struct iwm_wifi_cmd *cmd)
1118 {
1119         struct iwm_umac_notif_stop_resume_tx *stp_res_tx =
1120                 (struct iwm_umac_notif_stop_resume_tx *)buf;
1121         struct iwm_sta_info *sta_info;
1122         struct iwm_tid_info *tid_info;
1123         u8 sta_id = STA_ID_N_COLOR_ID(stp_res_tx->sta_id);
1124         u16 tid_msk = le16_to_cpu(stp_res_tx->stop_resume_tid_msk);
1125         int bit, ret = 0;
1126         bool stop = false;
1127
1128         IWM_DBG_NTF(iwm, DBG, "stop/resume notification:\n"
1129                     "\tflags:       0x%x\n"
1130                     "\tSTA id:      %d\n"
1131                     "\tTID bitmask: 0x%x\n",
1132                     stp_res_tx->flags, stp_res_tx->sta_id,
1133                     stp_res_tx->stop_resume_tid_msk);
1134
1135         if (stp_res_tx->flags & UMAC_STOP_TX_FLAG)
1136                 stop = true;
1137
1138         sta_info = &iwm->sta_table[sta_id];
1139         if (!sta_info->valid) {
1140                 IWM_ERR(iwm, "Stoping an invalid STA: %d %d\n",
1141                         sta_id, stp_res_tx->sta_id);
1142                 return -EINVAL;
1143         }
1144
1145         for_each_bit(bit, (unsigned long *)&tid_msk, IWM_UMAC_TID_NR) {
1146                 tid_info = &sta_info->tid_info[bit];
1147
1148                 mutex_lock(&tid_info->mutex);
1149                 tid_info->stopped = stop;
1150                 mutex_unlock(&tid_info->mutex);
1151
1152                 if (!stop) {
1153                         struct iwm_tx_queue *txq;
1154                         int queue = iwm_tid_to_queue(bit);
1155
1156                         if (queue < 0)
1157                                 continue;
1158
1159                         txq = &iwm->txq[queue];
1160                         /*
1161                          * If we resume, we have to move our SKBs
1162                          * back to the tx queue and queue some work.
1163                          */
1164                         spin_lock_bh(&txq->lock);
1165                         skb_queue_splice_init(&txq->queue, &txq->stopped_queue);
1166                         spin_unlock_bh(&txq->lock);
1167
1168                         queue_work(txq->wq, &txq->worker);
1169                 }
1170
1171         }
1172
1173         /* We send an ACK only for the stop case */
1174         if (stop)
1175                 ret = iwm_send_umac_stop_resume_tx(iwm, stp_res_tx);
1176
1177         return ret;
1178 }
1179
1180 static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf,
1181                                    unsigned long buf_size,
1182                                    struct iwm_wifi_cmd *cmd)
1183 {
1184         struct iwm_umac_wifi_if *hdr;
1185
1186         if (cmd == NULL) {
1187                 IWM_ERR(iwm, "Couldn't find expected wifi command\n");
1188                 return -EINVAL;
1189         }
1190
1191         hdr = (struct iwm_umac_wifi_if *)cmd->buf.payload;
1192
1193         IWM_DBG_NTF(iwm, DBG, "WIFI_IF_WRAPPER cmd is delivered to UMAC: "
1194                     "oid is 0x%x\n", hdr->oid);
1195
1196         if (hdr->oid <= WIFI_IF_NTFY_MAX) {
1197                 set_bit(hdr->oid, &iwm->wifi_ntfy[0]);
1198                 wake_up_interruptible(&iwm->wifi_ntfy_queue);
1199         } else
1200                 return -EINVAL;
1201
1202         switch (hdr->oid) {
1203         case UMAC_WIFI_IF_CMD_SET_PROFILE:
1204                 iwm->umac_profile_active = 1;
1205                 break;
1206         default:
1207                 break;
1208         }
1209
1210         return 0;
1211 }
1212
1213 #define CT_KILL_DELAY (30 * HZ)
1214 static int iwm_ntf_card_state(struct iwm_priv *iwm, u8 *buf,
1215                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
1216 {
1217         struct wiphy *wiphy = iwm_to_wiphy(iwm);
1218         struct iwm_lmac_card_state *state = (struct iwm_lmac_card_state *)
1219                                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1220         u32 flags = le32_to_cpu(state->flags);
1221
1222         IWM_INFO(iwm, "HW RF Kill %s, CT Kill %s\n",
1223                  flags & IWM_CARD_STATE_HW_DISABLED ? "ON" : "OFF",
1224                  flags & IWM_CARD_STATE_CTKILL_DISABLED ? "ON" : "OFF");
1225
1226         if (flags & IWM_CARD_STATE_CTKILL_DISABLED) {
1227                 /*
1228                  * We got a CTKILL event: We bring the interface down in
1229                  * oder to cool the device down, and try to bring it up
1230                  * 30 seconds later. If it's still too hot, we'll go through
1231                  * this code path again.
1232                  */
1233                 cancel_delayed_work_sync(&iwm->ct_kill_delay);
1234                 schedule_delayed_work(&iwm->ct_kill_delay, CT_KILL_DELAY);
1235         }
1236
1237         wiphy_rfkill_set_hw_state(wiphy, flags &
1238                                   (IWM_CARD_STATE_HW_DISABLED |
1239                                    IWM_CARD_STATE_CTKILL_DISABLED));
1240
1241         return 0;
1242 }
1243
1244 static int iwm_rx_handle_wifi(struct iwm_priv *iwm, u8 *buf,
1245                               unsigned long buf_size)
1246 {
1247         struct iwm_umac_wifi_in_hdr *wifi_hdr;
1248         struct iwm_wifi_cmd *cmd;
1249         u8 source, cmd_id;
1250         u16 seq_num;
1251         u32 count;
1252
1253         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1254         cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1255         source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1256         if (source >= IWM_SRC_NUM) {
1257                 IWM_CRIT(iwm, "invalid source %d\n", source);
1258                 return -EINVAL;
1259         }
1260
1261         if (cmd_id == REPLY_RX_MPDU_CMD)
1262                 trace_iwm_rx_packet(iwm, buf, buf_size);
1263         else if ((cmd_id == UMAC_NOTIFY_OPCODE_RX_TICKET) &&
1264                  (source == UMAC_HDI_IN_SOURCE_FW))
1265                 trace_iwm_rx_ticket(iwm, buf, buf_size);
1266         else
1267                 trace_iwm_rx_wifi_cmd(iwm, wifi_hdr);
1268
1269         count = GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_BYTE_COUNT);
1270         count += sizeof(struct iwm_umac_wifi_in_hdr) -
1271                  sizeof(struct iwm_dev_cmd_hdr);
1272         if (count > buf_size) {
1273                 IWM_CRIT(iwm, "count %d, buf size:%ld\n", count, buf_size);
1274                 return -EINVAL;
1275         }
1276
1277         seq_num = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
1278
1279         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x, seqnum: %d\n",
1280                    cmd_id, source, seq_num);
1281
1282         /*
1283          * If this is a response to a previously sent command, there must
1284          * be a pending command for this sequence number.
1285          */
1286         cmd = iwm_get_pending_wifi_cmd(iwm, seq_num);
1287
1288         /* Notify the caller only for sync commands. */
1289         switch (source) {
1290         case UMAC_HDI_IN_SOURCE_FHRX:
1291                 if (iwm->lmac_handlers[cmd_id] &&
1292                     test_bit(cmd_id, &iwm->lmac_handler_map[0]))
1293                         return iwm_notif_send(iwm, cmd, cmd_id, source,
1294                                               buf, count);
1295                 break;
1296         case UMAC_HDI_IN_SOURCE_FW:
1297                 if (iwm->umac_handlers[cmd_id] &&
1298                     test_bit(cmd_id, &iwm->umac_handler_map[0]))
1299                         return iwm_notif_send(iwm, cmd, cmd_id, source,
1300                                               buf, count);
1301                 break;
1302         case UMAC_HDI_IN_SOURCE_UDMA:
1303                 break;
1304         }
1305
1306         return iwm_rx_handle_resp(iwm, buf, count, cmd);
1307 }
1308
1309 int iwm_rx_handle_resp(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size,
1310                        struct iwm_wifi_cmd *cmd)
1311 {
1312         u8 source, cmd_id;
1313         struct iwm_umac_wifi_in_hdr *wifi_hdr;
1314         int ret = 0;
1315
1316         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1317         cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1318
1319         source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1320
1321         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x\n", cmd_id, source);
1322
1323         switch (source) {
1324         case UMAC_HDI_IN_SOURCE_FHRX:
1325                 if (iwm->lmac_handlers[cmd_id])
1326                         ret = iwm->lmac_handlers[cmd_id]
1327                                         (iwm, buf, buf_size, cmd);
1328                 break;
1329         case UMAC_HDI_IN_SOURCE_FW:
1330                 if (iwm->umac_handlers[cmd_id])
1331                         ret = iwm->umac_handlers[cmd_id]
1332                                         (iwm, buf, buf_size, cmd);
1333                 break;
1334         case UMAC_HDI_IN_SOURCE_UDMA:
1335                 ret = -EINVAL;
1336                 break;
1337         }
1338
1339         kfree(cmd);
1340
1341         return ret;
1342 }
1343
1344 static int iwm_rx_handle_nonwifi(struct iwm_priv *iwm, u8 *buf,
1345                                  unsigned long buf_size)
1346 {
1347         u8 seq_num;
1348         struct iwm_udma_in_hdr *hdr = (struct iwm_udma_in_hdr *)buf;
1349         struct iwm_nonwifi_cmd *cmd;
1350
1351         trace_iwm_rx_nonwifi_cmd(iwm, buf, buf_size);
1352         seq_num = GET_VAL32(hdr->cmd, UDMA_HDI_IN_CMD_NON_WIFI_HW_SEQ_NUM);
1353
1354         /*
1355          * We received a non wifi answer.
1356          * Let's check if there's a pending command for it, and if so
1357          * replace the command payload with the buffer, and then wake the
1358          * callers up.
1359          * That means we only support synchronised non wifi command response
1360          * schemes.
1361          */
1362         list_for_each_entry(cmd, &iwm->nonwifi_pending_cmd, pending)
1363                 if (cmd->seq_num == seq_num) {
1364                         cmd->resp_received = 1;
1365                         cmd->buf.len = buf_size;
1366                         memcpy(cmd->buf.hdr, buf, buf_size);
1367                         wake_up_interruptible(&iwm->nonwifi_queue);
1368                 }
1369
1370         return 0;
1371 }
1372
1373 static int iwm_rx_handle_umac(struct iwm_priv *iwm, u8 *buf,
1374                               unsigned long buf_size)
1375 {
1376         int ret = 0;
1377         u8 op_code;
1378         unsigned long buf_offset = 0;
1379         struct iwm_udma_in_hdr *hdr;
1380
1381         /*
1382          * To allow for a more efficient bus usage, UMAC
1383          * messages are encapsulated into UDMA ones. This
1384          * way we can have several UMAC messages in one bus
1385          * transfer.
1386          * A UDMA frame size is always aligned on 16 bytes,
1387          * and a UDMA frame must not start with a UMAC_PAD_TERMINAL
1388          * word. This is how we parse a bus frame into several
1389          * UDMA ones.
1390          */
1391         while (buf_offset < buf_size) {
1392
1393                 hdr = (struct iwm_udma_in_hdr *)(buf + buf_offset);
1394
1395                 if (iwm_rx_check_udma_hdr(hdr) < 0) {
1396                         IWM_DBG_RX(iwm, DBG, "End of frame\n");
1397                         break;
1398                 }
1399
1400                 op_code = GET_VAL32(hdr->cmd, UMAC_HDI_IN_CMD_OPCODE);
1401
1402                 IWM_DBG_RX(iwm, DBG, "Op code: 0x%x\n", op_code);
1403
1404                 if (op_code == UMAC_HDI_IN_OPCODE_WIFI) {
1405                         ret |= iwm_rx_handle_wifi(iwm, buf + buf_offset,
1406                                                   buf_size - buf_offset);
1407                 } else if (op_code < UMAC_HDI_IN_OPCODE_NONWIFI_MAX) {
1408                         if (GET_VAL32(hdr->cmd,
1409                                       UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) !=
1410                             UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) {
1411                                 IWM_ERR(iwm, "Incorrect hw signature\n");
1412                                 return -EINVAL;
1413                         }
1414                         ret |= iwm_rx_handle_nonwifi(iwm, buf + buf_offset,
1415                                                      buf_size - buf_offset);
1416                 } else {
1417                         IWM_ERR(iwm, "Invalid RX opcode: 0x%x\n", op_code);
1418                         ret |= -EINVAL;
1419                 }
1420
1421                 buf_offset += iwm_rx_resp_size(hdr);
1422         }
1423
1424         return ret;
1425 }
1426
1427 int iwm_rx_handle(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size)
1428 {
1429         struct iwm_udma_in_hdr *hdr;
1430
1431         hdr = (struct iwm_udma_in_hdr *)buf;
1432
1433         switch (le32_to_cpu(hdr->cmd)) {
1434         case UMAC_REBOOT_BARKER:
1435                 if (test_bit(IWM_STATUS_READY, &iwm->status)) {
1436                         IWM_ERR(iwm, "Unexpected BARKER\n");
1437
1438                         schedule_work(&iwm->reset_worker);
1439
1440                         return 0;
1441                 }
1442
1443                 return iwm_notif_send(iwm, NULL, IWM_BARKER_REBOOT_NOTIFICATION,
1444                                       IWM_SRC_UDMA, buf, buf_size);
1445         case UMAC_ACK_BARKER:
1446                 return iwm_notif_send(iwm, NULL, IWM_ACK_BARKER_NOTIFICATION,
1447                                       IWM_SRC_UDMA, NULL, 0);
1448         default:
1449                 IWM_DBG_RX(iwm, DBG, "Received cmd: 0x%x\n", hdr->cmd);
1450                 return iwm_rx_handle_umac(iwm, buf, buf_size);
1451         }
1452
1453         return 0;
1454 }
1455
1456 static const iwm_handler iwm_umac_handlers[] =
1457 {
1458         [UMAC_NOTIFY_OPCODE_ERROR]              = iwm_ntf_error,
1459         [UMAC_NOTIFY_OPCODE_ALIVE]              = iwm_ntf_umac_alive,
1460         [UMAC_NOTIFY_OPCODE_INIT_COMPLETE]      = iwm_ntf_init_complete,
1461         [UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS]   = iwm_ntf_wifi_status,
1462         [UMAC_NOTIFY_OPCODE_WIFI_IF_WRAPPER]    = iwm_ntf_mlme,
1463         [UMAC_NOTIFY_OPCODE_PAGE_DEALLOC]       = iwm_ntf_tx_credit_update,
1464         [UMAC_NOTIFY_OPCODE_RX_TICKET]          = iwm_ntf_rx_ticket,
1465         [UMAC_CMD_OPCODE_RESET]                 = iwm_ntf_umac_reset,
1466         [UMAC_NOTIFY_OPCODE_STATS]              = iwm_ntf_statistics,
1467         [UMAC_CMD_OPCODE_EEPROM_PROXY]          = iwm_ntf_eeprom_proxy,
1468         [UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST]    = iwm_ntf_channel_info_list,
1469         [UMAC_CMD_OPCODE_STOP_RESUME_STA_TX]    = iwm_ntf_stop_resume_tx,
1470         [REPLY_RX_MPDU_CMD]                     = iwm_ntf_rx_packet,
1471         [UMAC_CMD_OPCODE_WIFI_IF_WRAPPER]       = iwm_ntf_wifi_if_wrapper,
1472 };
1473
1474 static const iwm_handler iwm_lmac_handlers[] =
1475 {
1476         [REPLY_TX]                              = iwm_ntf_tx,
1477         [REPLY_ALIVE]                           = iwm_ntf_lmac_version,
1478         [CALIBRATION_RES_NOTIFICATION]          = iwm_ntf_calib_res,
1479         [CALIBRATION_COMPLETE_NOTIFICATION]     = iwm_ntf_calib_complete,
1480         [CALIBRATION_CFG_CMD]                   = iwm_ntf_calib_cfg,
1481         [REPLY_RX_MPDU_CMD]                     = iwm_ntf_rx_packet,
1482         [CARD_STATE_NOTIFICATION]               = iwm_ntf_card_state,
1483 };
1484
1485 void iwm_rx_setup_handlers(struct iwm_priv *iwm)
1486 {
1487         iwm->umac_handlers = (iwm_handler *) iwm_umac_handlers;
1488         iwm->lmac_handlers = (iwm_handler *) iwm_lmac_handlers;
1489 }
1490
1491 static void iwm_remove_iv(struct sk_buff *skb, u32 hdr_total_len)
1492 {
1493         struct ieee80211_hdr *hdr;
1494         unsigned int hdr_len;
1495
1496         hdr = (struct ieee80211_hdr *)skb->data;
1497
1498         if (!ieee80211_has_protected(hdr->frame_control))
1499                 return;
1500
1501         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1502         if (hdr_total_len <= hdr_len)
1503                 return;
1504
1505         memmove(skb->data + (hdr_total_len - hdr_len), skb->data, hdr_len);
1506         skb_pull(skb, (hdr_total_len - hdr_len));
1507 }
1508
1509 static void iwm_rx_adjust_packet(struct iwm_priv *iwm,
1510                                  struct iwm_rx_packet *packet,
1511                                  struct iwm_rx_ticket_node *ticket_node)
1512 {
1513         u32 payload_offset = 0, payload_len;
1514         struct iwm_rx_ticket *ticket = ticket_node->ticket;
1515         struct iwm_rx_mpdu_hdr *mpdu_hdr;
1516         struct ieee80211_hdr *hdr;
1517
1518         mpdu_hdr = (struct iwm_rx_mpdu_hdr *)packet->skb->data;
1519         payload_offset += sizeof(struct iwm_rx_mpdu_hdr);
1520         /* Padding is 0 or 2 bytes */
1521         payload_len = le16_to_cpu(mpdu_hdr->len) +
1522                 (le16_to_cpu(ticket->flags) & IWM_RX_TICKET_PAD_SIZE_MSK);
1523         payload_len -= ticket->tail_len;
1524
1525         IWM_DBG_RX(iwm, DBG, "Packet adjusted, len:%d, offset:%d, "
1526                    "ticket offset:%d ticket tail len:%d\n",
1527                    payload_len, payload_offset, ticket->payload_offset,
1528                    ticket->tail_len);
1529
1530         IWM_HEXDUMP(iwm, DBG, RX, "RAW: ", packet->skb->data, packet->skb->len);
1531
1532         skb_pull(packet->skb, payload_offset);
1533         skb_trim(packet->skb, payload_len);
1534
1535         iwm_remove_iv(packet->skb, ticket->payload_offset);
1536
1537         hdr = (struct ieee80211_hdr *) packet->skb->data;
1538         if (ieee80211_is_data_qos(hdr->frame_control)) {
1539                 /* UMAC handed QOS_DATA frame with 2 padding bytes appended
1540                  * to the qos_ctl field in IEEE 802.11 headers. */
1541                 memmove(packet->skb->data + IEEE80211_QOS_CTL_LEN + 2,
1542                         packet->skb->data,
1543                         ieee80211_hdrlen(hdr->frame_control) -
1544                         IEEE80211_QOS_CTL_LEN);
1545                 hdr = (struct ieee80211_hdr *) skb_pull(packet->skb,
1546                                 IEEE80211_QOS_CTL_LEN + 2);
1547                 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1548         }
1549
1550         IWM_HEXDUMP(iwm, DBG, RX, "ADJUSTED: ",
1551                     packet->skb->data, packet->skb->len);
1552 }
1553
1554 static void classify8023(struct sk_buff *skb)
1555 {
1556         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1557
1558         if (ieee80211_is_data_qos(hdr->frame_control)) {
1559                 u8 *qc = ieee80211_get_qos_ctl(hdr);
1560                 /* frame has qos control */
1561                 skb->priority = *qc & IEEE80211_QOS_CTL_TID_MASK;
1562         } else {
1563                 skb->priority = 0;
1564         }
1565 }
1566
1567 static void iwm_rx_process_amsdu(struct iwm_priv *iwm, struct sk_buff *skb)
1568 {
1569         struct wireless_dev *wdev = iwm_to_wdev(iwm);
1570         struct net_device *ndev = iwm_to_ndev(iwm);
1571         struct sk_buff_head list;
1572         struct sk_buff *frame;
1573
1574         IWM_HEXDUMP(iwm, DBG, RX, "A-MSDU: ", skb->data, skb->len);
1575
1576         __skb_queue_head_init(&list);
1577         ieee80211_amsdu_to_8023s(skb, &list, ndev->dev_addr, wdev->iftype, 0);
1578
1579         while ((frame = __skb_dequeue(&list))) {
1580                 ndev->stats.rx_packets++;
1581                 ndev->stats.rx_bytes += frame->len;
1582
1583                 frame->protocol = eth_type_trans(frame, ndev);
1584                 frame->ip_summed = CHECKSUM_NONE;
1585                 memset(frame->cb, 0, sizeof(frame->cb));
1586
1587                 if (netif_rx_ni(frame) == NET_RX_DROP) {
1588                         IWM_ERR(iwm, "Packet dropped\n");
1589                         ndev->stats.rx_dropped++;
1590                 }
1591         }
1592 }
1593
1594 static void iwm_rx_process_packet(struct iwm_priv *iwm,
1595                                   struct iwm_rx_packet *packet,
1596                                   struct iwm_rx_ticket_node *ticket_node)
1597 {
1598         int ret;
1599         struct sk_buff *skb = packet->skb;
1600         struct wireless_dev *wdev = iwm_to_wdev(iwm);
1601         struct net_device *ndev = iwm_to_ndev(iwm);
1602
1603         IWM_DBG_RX(iwm, DBG, "Processing packet ID %d\n", packet->id);
1604
1605         switch (le16_to_cpu(ticket_node->ticket->action)) {
1606         case IWM_RX_TICKET_RELEASE:
1607                 IWM_DBG_RX(iwm, DBG, "RELEASE packet\n");
1608
1609                 iwm_rx_adjust_packet(iwm, packet, ticket_node);
1610                 skb->dev = iwm_to_ndev(iwm);
1611                 classify8023(skb);
1612
1613                 if (le16_to_cpu(ticket_node->ticket->flags) &
1614                     IWM_RX_TICKET_AMSDU_MSK) {
1615                         iwm_rx_process_amsdu(iwm, skb);
1616                         break;
1617                 }
1618
1619                 ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype);
1620                 if (ret < 0) {
1621                         IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - "
1622                                    "%d\n", ret);
1623                         kfree_skb(packet->skb);
1624                         break;
1625                 }
1626
1627                 IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
1628
1629                 ndev->stats.rx_packets++;
1630                 ndev->stats.rx_bytes += skb->len;
1631
1632                 skb->protocol = eth_type_trans(skb, ndev);
1633                 skb->ip_summed = CHECKSUM_NONE;
1634                 memset(skb->cb, 0, sizeof(skb->cb));
1635
1636                 if (netif_rx_ni(skb) == NET_RX_DROP) {
1637                         IWM_ERR(iwm, "Packet dropped\n");
1638                         ndev->stats.rx_dropped++;
1639                 }
1640                 break;
1641         case IWM_RX_TICKET_DROP:
1642                 IWM_DBG_RX(iwm, DBG, "DROP packet: 0x%x\n",
1643                            le16_to_cpu(ticket_node->ticket->flags));
1644                 kfree_skb(packet->skb);
1645                 break;
1646         default:
1647                 IWM_ERR(iwm, "Unknown ticket action: %d\n",
1648                         le16_to_cpu(ticket_node->ticket->action));
1649                 kfree_skb(packet->skb);
1650         }
1651
1652         kfree(packet);
1653         iwm_rx_ticket_node_free(ticket_node);
1654 }
1655
1656 /*
1657  * Rx data processing:
1658  *
1659  * We're receiving Rx packet from the LMAC, and Rx ticket from
1660  * the UMAC.
1661  * To forward a target data packet upstream (i.e. to the
1662  * kernel network stack), we must have received an Rx ticket
1663  * that tells us we're allowed to release this packet (ticket
1664  * action is IWM_RX_TICKET_RELEASE). The Rx ticket also indicates,
1665  * among other things, where valid data actually starts in the Rx
1666  * packet.
1667  */
1668 void iwm_rx_worker(struct work_struct *work)
1669 {
1670         struct iwm_priv *iwm;
1671         struct iwm_rx_ticket_node *ticket, *next;
1672
1673         iwm = container_of(work, struct iwm_priv, rx_worker);
1674
1675         /*
1676          * We go through the tickets list and if there is a pending
1677          * packet for it, we push it upstream.
1678          * We stop whenever a ticket is missing its packet, as we're
1679          * supposed to send the packets in order.
1680          */
1681         spin_lock(&iwm->ticket_lock);
1682         list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
1683                 struct iwm_rx_packet *packet =
1684                         iwm_rx_packet_get(iwm, le16_to_cpu(ticket->ticket->id));
1685
1686                 if (!packet) {
1687                         IWM_DBG_RX(iwm, DBG, "Skip rx_work: Wait for ticket %d "
1688                                    "to be handled first\n",
1689                                    le16_to_cpu(ticket->ticket->id));
1690                         break;
1691                 }
1692
1693                 list_del(&ticket->node);
1694                 iwm_rx_process_packet(iwm, packet, ticket);
1695         }
1696         spin_unlock(&iwm->ticket_lock);
1697 }
1698