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 <linux/slab.h>
  48 #include <net/iw_handler.h>
  49
  50 #include "iwm.h"
  51 #include "debug.h"
  52 #include "hal.h"
  53 #include "umac.h"
  54 #include "lmac.h"
  55 #include "commands.h"
  56 #include "rx.h"
  57 #include "cfg80211.h"
  58 #include "eeprom.h"
  59
  60 static int iwm_rx_check_udma_hdr(struct iwm_udma_in_hdr *hdr)
  61 {
  62         if ((le32_to_cpu(hdr->cmd) == UMAC_PAD_TERMINAL) ||
  63             (le32_to_cpu(hdr->size) == UMAC_PAD_TERMINAL))
  64                 return -EINVAL;
  65
  66         return 0;
  67 }
  68
  69 static inline int iwm_rx_resp_size(struct iwm_udma_in_hdr *hdr)
  70 {
  71         return ALIGN(le32_to_cpu(hdr->size) + sizeof(struct iwm_udma_in_hdr),
  72                      16);
  73 }
  74
  75 /*
  76  * Notification handlers:
  77  *
  78  * For every possible notification we can receive from the
  79  * target, we have a handler.
  80  * When we get a target notification, and there is no one
  81  * waiting for it, it's just processed through the rx code
  82  * path:
  83  *
  84  * iwm_rx_handle()
  85  *  -> iwm_rx_handle_umac()
  86  *      -> iwm_rx_handle_wifi()
  87  *          -> iwm_rx_handle_resp()
  88  *              -> iwm_ntf_*()
  89  *
  90  *      OR
  91  *
  92  *      -> iwm_rx_handle_non_wifi()
  93  *
  94  * If there are processes waiting for this notification, then
  95  * iwm_rx_handle_wifi() just wakes those processes up and they
  96  * grab the pending notification.
  97  */
  98 static int iwm_ntf_error(struct iwm_priv *iwm, u8 *buf,
  99                          unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 100 {
 101         struct iwm_umac_notif_error *error;
 102         struct iwm_fw_error_hdr *fw_err;
 103
 104         error = (struct iwm_umac_notif_error *)buf;
 105         fw_err = &error->err;
 106
 107         memcpy(iwm->last_fw_err, fw_err, sizeof(struct iwm_fw_error_hdr));
 108
 109         IWM_ERR(iwm, "%cMAC FW ERROR:\n",
 110          (le32_to_cpu(fw_err->category) == UMAC_SYS_ERR_CAT_LMAC) ? 'L' : 'U');
 111         IWM_ERR(iwm, "\tCategory:    %d\n", le32_to_cpu(fw_err->category));
 112         IWM_ERR(iwm, "\tStatus:      0x%x\n", le32_to_cpu(fw_err->status));
 113         IWM_ERR(iwm, "\tPC:          0x%x\n", le32_to_cpu(fw_err->pc));
 114         IWM_ERR(iwm, "\tblink1:      %d\n", le32_to_cpu(fw_err->blink1));
 115         IWM_ERR(iwm, "\tblink2:      %d\n", le32_to_cpu(fw_err->blink2));
 116         IWM_ERR(iwm, "\tilink1:      %d\n", le32_to_cpu(fw_err->ilink1));
 117         IWM_ERR(iwm, "\tilink2:      %d\n", le32_to_cpu(fw_err->ilink2));
 118         IWM_ERR(iwm, "\tData1:       0x%x\n", le32_to_cpu(fw_err->data1));
 119         IWM_ERR(iwm, "\tData2:       0x%x\n", le32_to_cpu(fw_err->data2));
 120         IWM_ERR(iwm, "\tLine number: %d\n", le32_to_cpu(fw_err->line_num));
 121         IWM_ERR(iwm, "\tUMAC status: 0x%x\n", le32_to_cpu(fw_err->umac_status));
 122         IWM_ERR(iwm, "\tLMAC status: 0x%x\n", le32_to_cpu(fw_err->lmac_status));
 123         IWM_ERR(iwm, "\tSDIO status: 0x%x\n", le32_to_cpu(fw_err->sdio_status));
 124
 125         iwm_resetting(iwm);
 126
 127         return 0;
 128 }
 129
 130 static int iwm_ntf_umac_alive(struct iwm_priv *iwm, u8 *buf,
 131                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 132 {
 133         struct iwm_umac_notif_alive *alive_resp =
 134                         (struct iwm_umac_notif_alive *)(buf);
 135         u16 status = le16_to_cpu(alive_resp->status);
 136
 137         if (status == UMAC_NTFY_ALIVE_STATUS_ERR) {
 138                 IWM_ERR(iwm, "Receive error UMAC_ALIVE\n");
 139                 return -EIO;
 140         }
 141
 142         iwm_tx_credit_init_pools(iwm, alive_resp);
 143
 144         return 0;
 145 }
 146
 147 static int iwm_ntf_init_complete(struct iwm_priv *iwm, u8 *buf,
 148                                  unsigned long buf_size,
 149                                  struct iwm_wifi_cmd *cmd)
 150 {
 151         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 152         struct iwm_umac_notif_init_complete *init_complete =
 153                         (struct iwm_umac_notif_init_complete *)(buf);
 154         u16 status = le16_to_cpu(init_complete->status);
 155         bool blocked = (status == UMAC_NTFY_INIT_COMPLETE_STATUS_ERR);
 156
 157         if (blocked)
 158                 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is on (radio off)\n");
 159         else
 160                 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is off (radio on)\n");
 161
 162         wiphy_rfkill_set_hw_state(wiphy, blocked);
 163
 164         return 0;
 165 }
 166
 167 static int iwm_ntf_tx_credit_update(struct iwm_priv *iwm, u8 *buf,
 168                                     unsigned long buf_size,
 169                                     struct iwm_wifi_cmd *cmd)
 170 {
 171         int pool_nr, total_freed_pages;
 172         unsigned long pool_map;
 173         int i, id;
 174         struct iwm_umac_notif_page_dealloc *dealloc =
 175                         (struct iwm_umac_notif_page_dealloc *)buf;
 176
 177         pool_nr = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_CNT);
 178         pool_map = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_MSK);
 179
 180         IWM_DBG_TX(iwm, DBG, "UMAC dealloc notification: pool nr %d, "
 181                    "update map 0x%lx\n", pool_nr, pool_map);
 182
 183         spin_lock(&iwm->tx_credit.lock);
 184
 185         for (i = 0; i < pool_nr; i++) {
 186                 id = GET_VAL32(dealloc->grp_info[i],
 187                                UMAC_DEALLOC_NTFY_GROUP_NUM);
 188                 if (test_bit(id, &pool_map)) {
 189                         total_freed_pages = GET_VAL32(dealloc->grp_info[i],
 190                                               UMAC_DEALLOC_NTFY_PAGE_CNT);
 191                         iwm_tx_credit_inc(iwm, id, total_freed_pages);
 192                 }
 193         }
 194
 195         spin_unlock(&iwm->tx_credit.lock);
 196
 197         return 0;
 198 }
 199
 200 static int iwm_ntf_umac_reset(struct iwm_priv *iwm, u8 *buf,
 201                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 202 {
 203         IWM_DBG_NTF(iwm, DBG, "UMAC RESET done\n");
 204
 205         return 0;
 206 }
 207
 208 static int iwm_ntf_lmac_version(struct iwm_priv *iwm, u8 *buf,
 209                                 unsigned long buf_size,
 210                                 struct iwm_wifi_cmd *cmd)
 211 {
 212         IWM_DBG_NTF(iwm, INFO, "LMAC Version: %x.%x\n", buf[9], buf[8]);
 213
 214         return 0;
 215 }
 216
 217 static int iwm_ntf_tx(struct iwm_priv *iwm, u8 *buf,
 218                       unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 219 {
 220         struct iwm_lmac_tx_resp *tx_resp;
 221         struct iwm_umac_wifi_in_hdr *hdr;
 222
 223         tx_resp = (struct iwm_lmac_tx_resp *)
 224                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 225         hdr = (struct iwm_umac_wifi_in_hdr *)buf;
 226
 227         IWM_DBG_TX(iwm, DBG, "REPLY_TX, buf size: %lu\n", buf_size);
 228
 229         IWM_DBG_TX(iwm, DBG, "Seqnum: %d\n",
 230                    le16_to_cpu(hdr->sw_hdr.cmd.seq_num));
 231         IWM_DBG_TX(iwm, DBG, "\tFrame cnt: %d\n", tx_resp->frame_cnt);
 232         IWM_DBG_TX(iwm, DBG, "\tRetry cnt: %d\n",
 233                    le16_to_cpu(tx_resp->retry_cnt));
 234         IWM_DBG_TX(iwm, DBG, "\tSeq ctl: %d\n", le16_to_cpu(tx_resp->seq_ctl));
 235         IWM_DBG_TX(iwm, DBG, "\tByte cnt: %d\n",
 236                    le16_to_cpu(tx_resp->byte_cnt));
 237         IWM_DBG_TX(iwm, DBG, "\tStatus: 0x%x\n", le32_to_cpu(tx_resp->status));
 238
 239         return 0;
 240 }
 241
 242
 243 static int iwm_ntf_calib_res(struct iwm_priv *iwm, u8 *buf,
 244                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 245 {
 246         u8 opcode;
 247         u8 *calib_buf;
 248         struct iwm_lmac_calib_hdr *hdr = (struct iwm_lmac_calib_hdr *)
 249                                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 250
 251         opcode = hdr->opcode;
 252
 253         BUG_ON(opcode >= CALIBRATION_CMD_NUM ||
 254                opcode < PHY_CALIBRATE_OPCODES_NUM);
 255
 256         IWM_DBG_NTF(iwm, DBG, "Store calibration result for opcode: %d\n",
 257                     opcode);
 258
 259         buf_size -= sizeof(struct iwm_umac_wifi_in_hdr);
 260         calib_buf = iwm->calib_res[opcode].buf;
 261
 262         if (!calib_buf || (iwm->calib_res[opcode].size < buf_size)) {
 263                 kfree(calib_buf);
 264                 calib_buf = kzalloc(buf_size, GFP_KERNEL);
 265                 if (!calib_buf) {
 266                         IWM_ERR(iwm, "Memory allocation failed: calib_res\n");
 267                         return -ENOMEM;
 268                 }
 269                 iwm->calib_res[opcode].buf = calib_buf;
 270                 iwm->calib_res[opcode].size = buf_size;
 271         }
 272
 273         memcpy(calib_buf, hdr, buf_size);
 274         set_bit(opcode - PHY_CALIBRATE_OPCODES_NUM, &iwm->calib_done_map);
 275
 276         return 0;
 277 }
 278
 279 static int iwm_ntf_calib_complete(struct iwm_priv *iwm, u8 *buf,
 280                                   unsigned long buf_size,
 281                                   struct iwm_wifi_cmd *cmd)
 282 {
 283         IWM_DBG_NTF(iwm, DBG, "Calibration completed\n");
 284
 285         return 0;
 286 }
 287
 288 static int iwm_ntf_calib_cfg(struct iwm_priv *iwm, u8 *buf,
 289                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 290 {
 291         struct iwm_lmac_cal_cfg_resp *cal_resp;
 292
 293         cal_resp = (struct iwm_lmac_cal_cfg_resp *)
 294                         (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 295
 296         IWM_DBG_NTF(iwm, DBG, "Calibration CFG command status: %d\n",
 297                     le32_to_cpu(cal_resp->status));
 298
 299         return 0;
 300 }
 301
 302 static int iwm_ntf_wifi_status(struct iwm_priv *iwm, u8 *buf,
 303                                unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 304 {
 305         struct iwm_umac_notif_wifi_status *status =
 306                 (struct iwm_umac_notif_wifi_status *)buf;
 307
 308         iwm->core_enabled |= le16_to_cpu(status->status);
 309
 310         return 0;
 311 }
 312
 313 static struct iwm_rx_ticket_node *
 314 iwm_rx_ticket_node_alloc(struct iwm_priv *iwm, struct iwm_rx_ticket *ticket)
 315 {
 316         struct iwm_rx_ticket_node *ticket_node;
 317
 318         ticket_node = kzalloc(sizeof(struct iwm_rx_ticket_node), GFP_KERNEL);
 319         if (!ticket_node) {
 320                 IWM_ERR(iwm, "Couldn't allocate ticket node\n");
 321                 return ERR_PTR(-ENOMEM);
 322         }
 323
 324         ticket_node->ticket = kzalloc(sizeof(struct iwm_rx_ticket), GFP_KERNEL);
 325         if (!ticket_node->ticket) {
 326                 IWM_ERR(iwm, "Couldn't allocate RX ticket\n");
 327                 kfree(ticket_node);
 328                 return ERR_PTR(-ENOMEM);
 329         }
 330
 331         memcpy(ticket_node->ticket, ticket, sizeof(struct iwm_rx_ticket));
 332         INIT_LIST_HEAD(&ticket_node->node);
 333
 334         return ticket_node;
 335 }
 336
 337 static void iwm_rx_ticket_node_free(struct iwm_rx_ticket_node *ticket_node)
 338 {
 339         kfree(ticket_node->ticket);
 340         kfree(ticket_node);
 341 }
 342
 343 static struct iwm_rx_packet *iwm_rx_packet_get(struct iwm_priv *iwm, u16 id)
 344 {
 345         u8 id_hash = IWM_RX_ID_GET_HASH(id);
 346         struct iwm_rx_packet *packet;
 347
 348         spin_lock(&iwm->packet_lock[id_hash]);
 349         list_for_each_entry(packet, &iwm->rx_packets[id_hash], node)
 350                 if (packet->id == id) {
 351                         list_del(&packet->node);
 352                         spin_unlock(&iwm->packet_lock[id_hash]);
 353                         return packet;
 354                 }
 355
 356         spin_unlock(&iwm->packet_lock[id_hash]);
 357         return NULL;
 358 }
 359
 360 static struct iwm_rx_packet *iwm_rx_packet_alloc(struct iwm_priv *iwm, u8 *buf,
 361                                                  u32 size, u16 id)
 362 {
 363         struct iwm_rx_packet *packet;
 364
 365         packet = kzalloc(sizeof(struct iwm_rx_packet), GFP_KERNEL);
 366         if (!packet) {
 367                 IWM_ERR(iwm, "Couldn't allocate packet\n");
 368                 return ERR_PTR(-ENOMEM);
 369         }
 370
 371         packet->skb = dev_alloc_skb(size);
 372         if (!packet->skb) {
 373                 IWM_ERR(iwm, "Couldn't allocate packet SKB\n");
 374                 kfree(packet);
 375                 return ERR_PTR(-ENOMEM);
 376         }
 377
 378         packet->pkt_size = size;
 379
 380         skb_put(packet->skb, size);
 381         memcpy(packet->skb->data, buf, size);
 382         INIT_LIST_HEAD(&packet->node);
 383         packet->id = id;
 384
 385         return packet;
 386 }
 387
 388 void iwm_rx_free(struct iwm_priv *iwm)
 389 {
 390         struct iwm_rx_ticket_node *ticket, *nt;
 391         struct iwm_rx_packet *packet, *np;
 392         int i;
 393
 394         spin_lock(&iwm->ticket_lock);
 395         list_for_each_entry_safe(ticket, nt, &iwm->rx_tickets, node) {
 396                 list_del(&ticket->node);
 397                 iwm_rx_ticket_node_free(ticket);
 398         }
 399         spin_unlock(&iwm->ticket_lock);
 400
 401         for (i = 0; i < IWM_RX_ID_HASH; i++) {
 402                 spin_lock(&iwm->packet_lock[i]);
 403                 list_for_each_entry_safe(packet, np, &iwm->rx_packets[i],
 404                                          node) {
 405                         list_del(&packet->node);
 406                         kfree_skb(packet->skb);
 407                         kfree(packet);
 408                 }
 409                 spin_unlock(&iwm->packet_lock[i]);
 410         }
 411 }
 412
 413 static int iwm_ntf_rx_ticket(struct iwm_priv *iwm, u8 *buf,
 414                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 415 {
 416         struct iwm_umac_notif_rx_ticket *ntf_rx_ticket =
 417                 (struct iwm_umac_notif_rx_ticket *)buf;
 418         struct iwm_rx_ticket *ticket =
 419                 (struct iwm_rx_ticket *)ntf_rx_ticket->tickets;
 420         int i, schedule_rx = 0;
 421
 422         for (i = 0; i < ntf_rx_ticket->num_tickets; i++) {
 423                 struct iwm_rx_ticket_node *ticket_node;
 424
 425                 switch (le16_to_cpu(ticket->action)) {
 426                 case IWM_RX_TICKET_RELEASE:
 427                 case IWM_RX_TICKET_DROP:
 428                         /* We can push the packet to the stack */
 429                         ticket_node = iwm_rx_ticket_node_alloc(iwm, ticket);
 430                         if (IS_ERR(ticket_node))
 431                                 return PTR_ERR(ticket_node);
 432
 433                         IWM_DBG_RX(iwm, DBG, "TICKET %s(%d)\n",
 434                                    ticket->action ==  IWM_RX_TICKET_RELEASE ?
 435                                    "RELEASE" : "DROP",
 436                                    ticket->id);
 437                         spin_lock(&iwm->ticket_lock);
 438                         list_add_tail(&ticket_node->node, &iwm->rx_tickets);
 439                         spin_unlock(&iwm->ticket_lock);
 440
 441                         /*
 442                          * We received an Rx ticket, most likely there's
 443                          * a packet pending for it, it's not worth going
 444                          * through the packet hash list to double check.
 445                          * Let's just fire the rx worker..
 446                          */
 447                         schedule_rx = 1;
 448
 449                         break;
 450
 451                 default:
 452                         IWM_ERR(iwm, "Invalid RX ticket action: 0x%x\n",
 453                                 ticket->action);
 454                 }
 455
 456                 ticket++;
 457         }
 458
 459         if (schedule_rx)
 460                 queue_work(iwm->rx_wq, &iwm->rx_worker);
 461
 462         return 0;
 463 }
 464
 465 static int iwm_ntf_rx_packet(struct iwm_priv *iwm, u8 *buf,
 466                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 467 {
 468         struct iwm_umac_wifi_in_hdr *wifi_hdr;
 469         struct iwm_rx_packet *packet;
 470         u16 id, buf_offset;
 471         u32 packet_size;
 472         u8 id_hash;
 473
 474         IWM_DBG_RX(iwm, DBG, "\n");
 475
 476         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
 477         id = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
 478         buf_offset = sizeof(struct iwm_umac_wifi_in_hdr);
 479         packet_size = buf_size - sizeof(struct iwm_umac_wifi_in_hdr);
 480
 481         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, seqnum: %d, packet size: %d\n",
 482                    wifi_hdr->sw_hdr.cmd.cmd, id, packet_size);
 483         IWM_DBG_RX(iwm, DBG, "Packet id: %d\n", id);
 484         IWM_HEXDUMP(iwm, DBG, RX, "PACKET: ", buf + buf_offset, packet_size);
 485
 486         packet = iwm_rx_packet_alloc(iwm, buf + buf_offset, packet_size, id);
 487         if (IS_ERR(packet))
 488                 return PTR_ERR(packet);
 489
 490         id_hash = IWM_RX_ID_GET_HASH(id);
 491         spin_lock(&iwm->packet_lock[id_hash]);
 492         list_add_tail(&packet->node, &iwm->rx_packets[id_hash]);
 493         spin_unlock(&iwm->packet_lock[id_hash]);
 494
 495         /* We might (unlikely) have received the packet _after_ the ticket */
 496         queue_work(iwm->rx_wq, &iwm->rx_worker);
 497
 498         return 0;
 499 }
 500
 501 /* MLME handlers */
 502 static int iwm_mlme_assoc_start(struct iwm_priv *iwm, u8 *buf,
 503                                 unsigned long buf_size,
 504                                 struct iwm_wifi_cmd *cmd)
 505 {
 506         struct iwm_umac_notif_assoc_start *start;
 507
 508         start = (struct iwm_umac_notif_assoc_start *)buf;
 509
 510         IWM_DBG_MLME(iwm, INFO, "Association with %pM Started, reason: %d\n",
 511                      start->bssid, le32_to_cpu(start->roam_reason));
 512
 513         wake_up_interruptible(&iwm->mlme_queue);
 514
 515         return 0;
 516 }
 517
 518 static u8 iwm_is_open_wep_profile(struct iwm_priv *iwm)
 519 {
 520         if ((iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_40 ||
 521              iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_104) &&
 522             (iwm->umac_profile->sec.ucast_cipher ==
 523              iwm->umac_profile->sec.mcast_cipher) &&
 524             (iwm->umac_profile->sec.auth_type == UMAC_AUTH_TYPE_OPEN))
 525                return 1;
 526
 527        return 0;
 528 }
 529
 530 static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
 531                                    unsigned long buf_size,
 532                                    struct iwm_wifi_cmd *cmd)
 533 {
 534         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 535         struct ieee80211_channel *chan;
 536         struct iwm_umac_notif_assoc_complete *complete =
 537                 (struct iwm_umac_notif_assoc_complete *)buf;
 538
 539         IWM_DBG_MLME(iwm, INFO, "Association with %pM completed, status: %d\n",
 540                      complete->bssid, complete->status);
 541
 542         switch (le32_to_cpu(complete->status)) {
 543         case UMAC_ASSOC_COMPLETE_SUCCESS:
 544                 chan = ieee80211_get_channel(wiphy,
 545                         ieee80211_channel_to_frequency(complete->channel));
 546                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
 547                         /* Associated to a unallowed channel, disassociate. */
 548                         __iwm_invalidate_mlme_profile(iwm);
 549                         IWM_WARN(iwm, "Couldn't associate with %pM due to "
 550                                  "channel %d is disabled. Check your local "
 551                                  "regulatory setting.\n",
 552                                  complete->bssid, complete->channel);
 553                         goto failure;
 554                 }
 555
 556                 set_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 557                 memcpy(iwm->bssid, complete->bssid, ETH_ALEN);
 558                 iwm->channel = complete->channel;
 559
 560                 /* Internal roaming state, avoid notifying SME. */
 561                 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
 562                     && iwm->conf.mode == UMAC_MODE_BSS) {
 563                         cancel_delayed_work(&iwm->disconnect);
 564                         cfg80211_roamed(iwm_to_ndev(iwm),
 565                                         complete->bssid,
 566                                         iwm->req_ie, iwm->req_ie_len,
 567                                         iwm->resp_ie, iwm->resp_ie_len,
 568                                         GFP_KERNEL);
 569                         break;
 570                 }
 571
 572                 iwm_link_on(iwm);
 573
 574                 if (iwm->conf.mode == UMAC_MODE_IBSS)
 575                         goto ibss;
 576
 577                 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
 578                         cfg80211_connect_result(iwm_to_ndev(iwm),
 579                                                 complete->bssid,
 580                                                 iwm->req_ie, iwm->req_ie_len,
 581                                                 iwm->resp_ie, iwm->resp_ie_len,
 582                                                 WLAN_STATUS_SUCCESS,
 583                                                 GFP_KERNEL);
 584                 else
 585                         cfg80211_roamed(iwm_to_ndev(iwm),
 586                                         complete->bssid,
 587                                         iwm->req_ie, iwm->req_ie_len,
 588                                         iwm->resp_ie, iwm->resp_ie_len,
 589                                         GFP_KERNEL);
 590                 break;
 591         case UMAC_ASSOC_COMPLETE_FAILURE:
 592  failure:
 593                 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 594                 memset(iwm->bssid, 0, ETH_ALEN);
 595                 iwm->channel = 0;
 596
 597                 /* Internal roaming state, avoid notifying SME. */
 598                 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
 599                     && iwm->conf.mode == UMAC_MODE_BSS) {
 600                         cancel_delayed_work(&iwm->disconnect);
 601                         break;
 602                 }
 603
 604                 iwm_link_off(iwm);
 605
 606                 if (iwm->conf.mode == UMAC_MODE_IBSS)
 607                         goto ibss;
 608
 609                 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
 610                         if (!iwm_is_open_wep_profile(iwm)) {
 611                                 cfg80211_connect_result(iwm_to_ndev(iwm),
 612                                                complete->bssid,
 613                                                NULL, 0, NULL, 0,
 614                                                WLAN_STATUS_UNSPECIFIED_FAILURE,
 615                                                GFP_KERNEL);
 616                         } else {
 617                                 /* Let's try shared WEP auth */
 618                                 IWM_ERR(iwm, "Trying WEP shared auth\n");
 619                                 schedule_work(&iwm->auth_retry_worker);
 620                         }
 621                 else
 622                         cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0,
 623                                               GFP_KERNEL);
 624                 break;
 625         default:
 626                 break;
 627         }
 628
 629         clear_bit(IWM_STATUS_RESETTING, &iwm->status);
 630         return 0;
 631
 632  ibss:
 633         cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL);
 634         clear_bit(IWM_STATUS_RESETTING, &iwm->status);
 635         return 0;
 636 }
 637
 638 static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
 639                                        unsigned long buf_size,
 640                                        struct iwm_wifi_cmd *cmd)
 641 {
 642         struct iwm_umac_notif_profile_invalidate *invalid;
 643         u32 reason;
 644
 645         invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
 646         reason = le32_to_cpu(invalid->reason);
 647
 648         IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n", reason);
 649
 650         if (reason != UMAC_PROFILE_INVALID_REQUEST &&
 651             test_bit(IWM_STATUS_SME_CONNECTING, &iwm->status))
 652                 cfg80211_connect_result(iwm_to_ndev(iwm), NULL, NULL, 0, NULL,
 653                                         0, WLAN_STATUS_UNSPECIFIED_FAILURE,
 654                                         GFP_KERNEL);
 655
 656         clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status);
 657         clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 658
 659         iwm->umac_profile_active = 0;
 660         memset(iwm->bssid, 0, ETH_ALEN);
 661         iwm->channel = 0;
 662
 663         iwm_link_off(iwm);
 664
 665         wake_up_interruptible(&iwm->mlme_queue);
 666
 667         return 0;
 668 }
 669
 670 #define IWM_DISCONNECT_INTERVAL (5 * HZ)
 671
 672 static int iwm_mlme_connection_terminated(struct iwm_priv *iwm, u8 *buf,
 673                                           unsigned long buf_size,
 674                                           struct iwm_wifi_cmd *cmd)
 675 {
 676         IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
 677
 678         schedule_delayed_work(&iwm->disconnect, IWM_DISCONNECT_INTERVAL);
 679
 680         return 0;
 681 }
 682
 683 static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf,
 684                                   unsigned long buf_size,
 685                                   struct iwm_wifi_cmd *cmd)
 686 {
 687         int ret;
 688         struct iwm_umac_notif_scan_complete *scan_complete =
 689                 (struct iwm_umac_notif_scan_complete *)buf;
 690         u32 result = le32_to_cpu(scan_complete->result);
 691
 692         IWM_DBG_MLME(iwm, INFO, "type:0x%x result:0x%x seq:%d\n",
 693                      le32_to_cpu(scan_complete->type),
 694                      le32_to_cpu(scan_complete->result),
 695                      scan_complete->seq_num);
 696
 697         if (!test_and_clear_bit(IWM_STATUS_SCANNING, &iwm->status)) {
 698                 IWM_ERR(iwm, "Scan complete while device not scanning\n");
 699                 return -EIO;
 700         }
 701         if (!iwm->scan_request)
 702                 return 0;
 703
 704         ret = iwm_cfg80211_inform_bss(iwm);
 705
 706         cfg80211_scan_done(iwm->scan_request,
 707                            (result & UMAC_SCAN_RESULT_ABORTED) ? 1 : !!ret);
 708         iwm->scan_request = NULL;
 709
 710         return ret;
 711 }
 712
 713 static int iwm_mlme_update_sta_table(struct iwm_priv *iwm, u8 *buf,
 714                                      unsigned long buf_size,
 715                                      struct iwm_wifi_cmd *cmd)
 716 {
 717         struct iwm_umac_notif_sta_info *umac_sta =
 718                         (struct iwm_umac_notif_sta_info *)buf;
 719         struct iwm_sta_info *sta;
 720         int i;
 721
 722         switch (le32_to_cpu(umac_sta->opcode)) {
 723         case UMAC_OPCODE_ADD_MODIFY:
 724                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 725
 726                 IWM_DBG_MLME(iwm, INFO, "%s STA: ID = %d, Color = %d, "
 727                              "addr = %pM, qos = %d\n",
 728                              sta->valid ? "Modify" : "Add",
 729                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 730                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 731                              umac_sta->mac_addr,
 732                              umac_sta->flags & UMAC_STA_FLAG_QOS);
 733
 734                 sta->valid = 1;
 735                 sta->qos = umac_sta->flags & UMAC_STA_FLAG_QOS;
 736                 sta->color = GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR);
 737                 memcpy(sta->addr, umac_sta->mac_addr, ETH_ALEN);
 738                 break;
 739         case UMAC_OPCODE_REMOVE:
 740                 IWM_DBG_MLME(iwm, INFO, "Remove STA: ID = %d, Color = %d, "
 741                              "addr = %pM\n",
 742                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 743                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 744                              umac_sta->mac_addr);
 745
 746                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 747
 748                 if (!memcmp(sta->addr, umac_sta->mac_addr, ETH_ALEN))
 749                         sta->valid = 0;
 750
 751                 break;
 752         case UMAC_OPCODE_CLEAR_ALL:
 753                 for (i = 0; i < IWM_STA_TABLE_NUM; i++)
 754                         iwm->sta_table[i].valid = 0;
 755
 756                 break;
 757         default:
 758                 break;
 759         }
 760
 761         return 0;
 762 }
 763
 764 static int iwm_mlme_medium_lost(struct iwm_priv *iwm, u8 *buf,
 765                                 unsigned long buf_size,
 766                                 struct iwm_wifi_cmd *cmd)
 767 {
 768         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 769
 770         IWM_DBG_NTF(iwm, DBG, "WiFi/WiMax coexistence radio is OFF\n");
 771
 772         wiphy_rfkill_set_hw_state(wiphy, true);
 773
 774         return 0;
 775 }
 776
 777 static int iwm_mlme_update_bss_table(struct iwm_priv *iwm, u8 *buf,
 778                                      unsigned long buf_size,
 779                                      struct iwm_wifi_cmd *cmd)
 780 {
 781         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 782         struct ieee80211_mgmt *mgmt;
 783         struct iwm_umac_notif_bss_info *umac_bss =
 784                         (struct iwm_umac_notif_bss_info *)buf;
 785         struct ieee80211_channel *channel;
 786         struct ieee80211_supported_band *band;
 787         struct iwm_bss_info *bss;
 788         s32 signal;
 789         int freq;
 790         u16 frame_len = le16_to_cpu(umac_bss->frame_len);
 791         size_t bss_len = sizeof(struct iwm_umac_notif_bss_info) + frame_len;
 792
 793         mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf);
 794
 795         IWM_DBG_MLME(iwm, DBG, "New BSS info entry: %pM\n", mgmt->bssid);
 796         IWM_DBG_MLME(iwm, DBG, "\tType: 0x%x\n", le32_to_cpu(umac_bss->type));
 797         IWM_DBG_MLME(iwm, DBG, "\tTimestamp: %d\n",
 798                      le32_to_cpu(umac_bss->timestamp));
 799         IWM_DBG_MLME(iwm, DBG, "\tTable Index: %d\n",
 800                      le16_to_cpu(umac_bss->table_idx));
 801         IWM_DBG_MLME(iwm, DBG, "\tBand: %d\n", umac_bss->band);
 802         IWM_DBG_MLME(iwm, DBG, "\tChannel: %d\n", umac_bss->channel);
 803         IWM_DBG_MLME(iwm, DBG, "\tRSSI: %d\n", umac_bss->rssi);
 804         IWM_DBG_MLME(iwm, DBG, "\tFrame Length: %d\n", frame_len);
 805
 806         list_for_each_entry(bss, &iwm->bss_list, node)
 807                 if (bss->bss->table_idx == umac_bss->table_idx)
 808                         break;
 809
 810         if (&bss->node != &iwm->bss_list) {
 811                 /* Remove the old BSS entry, we will add it back later. */
 812                 list_del(&bss->node);
 813                 kfree(bss->bss);
 814         } else {
 815                 /* New BSS entry */
 816
 817                 bss = kzalloc(sizeof(struct iwm_bss_info), GFP_KERNEL);
 818                 if (!bss) {
 819                         IWM_ERR(iwm, "Couldn't allocate bss_info\n");
 820                         return -ENOMEM;
 821                 }
 822         }
 823
 824         bss->bss = kzalloc(bss_len, GFP_KERNEL);
 825         if (!bss->bss) {
 826                 kfree(bss);
 827                 IWM_ERR(iwm, "Couldn't allocate bss\n");
 828                 return -ENOMEM;
 829         }
 830
 831         INIT_LIST_HEAD(&bss->node);
 832         memcpy(bss->bss, umac_bss, bss_len);
 833
 834         if (umac_bss->band == UMAC_BAND_2GHZ)
 835                 band = wiphy->bands[IEEE80211_BAND_2GHZ];
 836         else if (umac_bss->band == UMAC_BAND_5GHZ)
 837                 band = wiphy->bands[IEEE80211_BAND_5GHZ];
 838         else {
 839                 IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band);
 840                 goto err;
 841         }
 842
 843         freq = ieee80211_channel_to_frequency(umac_bss->channel);
 844         channel = ieee80211_get_channel(wiphy, freq);
 845         signal = umac_bss->rssi * 100;
 846
 847         bss->cfg_bss = cfg80211_inform_bss_frame(wiphy, channel,
 848                                                  mgmt, frame_len,
 849                                                  signal, GFP_KERNEL);
 850         if (!bss->cfg_bss)
 851                 goto err;
 852
 853         list_add_tail(&bss->node, &iwm->bss_list);
 854
 855         return 0;
 856  err:
 857         kfree(bss->bss);
 858         kfree(bss);
 859
 860         return -EINVAL;
 861 }
 862
 863 static int iwm_mlme_remove_bss(struct iwm_priv *iwm, u8 *buf,
 864                                unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 865 {
 866         struct iwm_umac_notif_bss_removed *bss_rm =
 867                 (struct iwm_umac_notif_bss_removed *)buf;
 868         struct iwm_bss_info *bss, *next;
 869         u16 table_idx;
 870         int i;
 871
 872         for (i = 0; i < le32_to_cpu(bss_rm->count); i++) {
 873                 table_idx = le16_to_cpu(bss_rm->entries[i]) &
 874                             IWM_BSS_REMOVE_INDEX_MSK;
 875                 list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
 876                         if (bss->bss->table_idx == cpu_to_le16(table_idx)) {
 877                                 struct ieee80211_mgmt *mgmt;
 878
 879                                 mgmt = (struct ieee80211_mgmt *)
 880                                         (bss->bss->frame_buf);
 881                                 IWM_DBG_MLME(iwm, ERR, "BSS removed: %pM\n",
 882                                              mgmt->bssid);
 883                                 list_del(&bss->node);
 884                                 kfree(bss->bss);
 885                                 kfree(bss);
 886                         }
 887         }
 888
 889         return 0;
 890 }
 891
 892 static int iwm_mlme_mgt_frame(struct iwm_priv *iwm, u8 *buf,
 893                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 894 {
 895         struct iwm_umac_notif_mgt_frame *mgt_frame =
 896                         (struct iwm_umac_notif_mgt_frame *)buf;
 897         struct ieee80211_mgmt *mgt = (struct ieee80211_mgmt *)mgt_frame->frame;
 898
 899         IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame,
 900                     le16_to_cpu(mgt_frame->len));
 901
 902         if (ieee80211_is_assoc_req(mgt->frame_control)) {
 903                 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
 904                                   - offsetof(struct ieee80211_mgmt,
 905                                              u.assoc_req.variable);
 906                 kfree(iwm->req_ie);
 907                 iwm->req_ie = kmemdup(mgt->u.assoc_req.variable,
 908                                       iwm->req_ie_len, GFP_KERNEL);
 909         } else if (ieee80211_is_reassoc_req(mgt->frame_control)) {
 910                 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
 911                                   - offsetof(struct ieee80211_mgmt,
 912                                              u.reassoc_req.variable);
 913                 kfree(iwm->req_ie);
 914                 iwm->req_ie = kmemdup(mgt->u.reassoc_req.variable,
 915                                       iwm->req_ie_len, GFP_KERNEL);
 916         } else if (ieee80211_is_assoc_resp(mgt->frame_control)) {
 917                 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
 918                                    - offsetof(struct ieee80211_mgmt,
 919                                               u.assoc_resp.variable);
 920                 kfree(iwm->resp_ie);
 921                 iwm->resp_ie = kmemdup(mgt->u.assoc_resp.variable,
 922                                        iwm->resp_ie_len, GFP_KERNEL);
 923         } else if (ieee80211_is_reassoc_resp(mgt->frame_control)) {
 924                 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
 925                                    - offsetof(struct ieee80211_mgmt,
 926                                               u.reassoc_resp.variable);
 927                 kfree(iwm->resp_ie);
 928                 iwm->resp_ie = kmemdup(mgt->u.reassoc_resp.variable,
 929                                        iwm->resp_ie_len, GFP_KERNEL);
 930         } else {
 931                 IWM_ERR(iwm, "Unsupported management frame: 0x%x",
 932                         le16_to_cpu(mgt->frame_control));
 933                 return 0;
 934         }
 935
 936         return 0;
 937 }
 938
 939 static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf,
 940                         unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 941 {
 942         struct iwm_umac_notif_wifi_if *notif =
 943                 (struct iwm_umac_notif_wifi_if *)buf;
 944
 945         switch (notif->status) {
 946         case WIFI_IF_NTFY_ASSOC_START:
 947                 return iwm_mlme_assoc_start(iwm, buf, buf_size, cmd);
 948         case WIFI_IF_NTFY_ASSOC_COMPLETE:
 949                 return iwm_mlme_assoc_complete(iwm, buf, buf_size, cmd);
 950         case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE:
 951                 return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd);
 952         case WIFI_IF_NTFY_CONNECTION_TERMINATED:
 953                 return iwm_mlme_connection_terminated(iwm, buf, buf_size, cmd);
 954         case WIFI_IF_NTFY_SCAN_COMPLETE:
 955                 return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd);
 956         case WIFI_IF_NTFY_STA_TABLE_CHANGE:
 957                 return iwm_mlme_update_sta_table(iwm, buf, buf_size, cmd);
 958         case WIFI_IF_NTFY_EXTENDED_IE_REQUIRED:
 959                 IWM_DBG_MLME(iwm, DBG, "Extended IE required\n");
 960                 break;
 961         case WIFI_IF_NTFY_RADIO_PREEMPTION:
 962                 return iwm_mlme_medium_lost(iwm, buf, buf_size, cmd);
 963         case WIFI_IF_NTFY_BSS_TRK_TABLE_CHANGED:
 964                 return iwm_mlme_update_bss_table(iwm, buf, buf_size, cmd);
 965         case WIFI_IF_NTFY_BSS_TRK_ENTRIES_REMOVED:
 966                 return iwm_mlme_remove_bss(iwm, buf, buf_size, cmd);
 967                 break;
 968         case WIFI_IF_NTFY_MGMT_FRAME:
 969                 return iwm_mlme_mgt_frame(iwm, buf, buf_size, cmd);
 970         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_START:
 971         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_COMPLETE:
 972         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_START:
 973         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_RESULT:
 974         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_START:
 975         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_COMPLETE:
 976         case WIFI_DBG_IF_NTFY_CNCT_ATC_START:
 977         case WIFI_DBG_IF_NTFY_COEX_NOTIFICATION:
 978         case WIFI_DBG_IF_NTFY_COEX_HANDLE_ENVELOP:
 979         case WIFI_DBG_IF_NTFY_COEX_HANDLE_RELEASE_ENVELOP:
 980                 IWM_DBG_MLME(iwm, DBG, "MLME debug notification: 0x%x\n",
 981                              notif->status);
 982                 break;
 983         default:
 984                 IWM_ERR(iwm, "Unhandled notification: 0x%x\n", notif->status);
 985                 break;
 986         }
 987
 988         return 0;
 989 }
 990
 991 #define IWM_STATS_UPDATE_INTERVAL               (2 * HZ)
 992
 993 static int iwm_ntf_statistics(struct iwm_priv *iwm, u8 *buf,
 994                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 995 {
 996         struct iwm_umac_notif_stats *stats = (struct iwm_umac_notif_stats *)buf;
 997         struct iw_statistics *wstats = &iwm->wstats;
 998         u16 max_rate = 0;
 999         int i;
1000
1001         IWM_DBG_MLME(iwm, DBG, "Statistics notification received\n");
1002
1003         if (test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) {
1004                 for (i = 0; i < UMAC_NTF_RATE_SAMPLE_NR; i++) {
1005                         max_rate = max_t(u16, max_rate,
1006                                          max(le16_to_cpu(stats->tx_rate[i]),
1007                                              le16_to_cpu(stats->rx_rate[i])));
1008                 }
1009                 /* UMAC passes rate info multiplies by 2 */
1010                 iwm->rate = max_rate >> 1;
1011         }
1012         iwm->txpower = le32_to_cpu(stats->tx_power);
1013
1014         wstats->status = 0;
1015
1016         wstats->discard.nwid = le32_to_cpu(stats->rx_drop_other_bssid);
1017         wstats->discard.code = le32_to_cpu(stats->rx_drop_decode);
1018         wstats->discard.fragment = le32_to_cpu(stats->rx_drop_reassembly);
1019         wstats->discard.retries = le32_to_cpu(stats->tx_drop_max_retry);
1020
1021         wstats->miss.beacon = le32_to_cpu(stats->missed_beacons);
1022
1023         /* according to cfg80211 */
1024         if (stats->rssi_dbm < -110)
1025                 wstats->qual.qual = 0;
1026         else if (stats->rssi_dbm > -40)
1027                 wstats->qual.qual = 70;
1028         else
1029                 wstats->qual.qual = stats->rssi_dbm + 110;
1030
1031         wstats->qual.level = stats->rssi_dbm;
1032         wstats->qual.noise = stats->noise_dbm;
1033         wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
1034
1035         schedule_delayed_work(&iwm->stats_request, IWM_STATS_UPDATE_INTERVAL);
1036
1037         mod_timer(&iwm->watchdog, round_jiffies(jiffies + IWM_WATCHDOG_PERIOD));
1038
1039         return 0;
1040 }
1041
1042 static int iwm_ntf_eeprom_proxy(struct iwm_priv *iwm, u8 *buf,
1043                                 unsigned long buf_size,
1044                                 struct iwm_wifi_cmd *cmd)
1045 {
1046         struct iwm_umac_cmd_eeprom_proxy *eeprom_proxy =
1047                 (struct iwm_umac_cmd_eeprom_proxy *)
1048                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1049         struct iwm_umac_cmd_eeprom_proxy_hdr *hdr = &eeprom_proxy->hdr;
1050         u32 hdr_offset = le32_to_cpu(hdr->offset);
1051         u32 hdr_len = le32_to_cpu(hdr->len);
1052         u32 hdr_type = le32_to_cpu(hdr->type);
1053
1054         IWM_DBG_NTF(iwm, DBG, "type: 0x%x, len: %d, offset: 0x%x\n",
1055                     hdr_type, hdr_len, hdr_offset);
1056
1057         if ((hdr_offset + hdr_len) > IWM_EEPROM_LEN)
1058                 return -EINVAL;
1059
1060         switch (hdr_type) {
1061         case IWM_UMAC_CMD_EEPROM_TYPE_READ:
1062                 memcpy(iwm->eeprom + hdr_offset, eeprom_proxy->buf, hdr_len);
1063                 break;
1064         case IWM_UMAC_CMD_EEPROM_TYPE_WRITE:
1065         default:
1066                 return -ENOTSUPP;
1067         }
1068
1069         return 0;
1070 }
1071
1072 static int iwm_ntf_channel_info_list(struct iwm_priv *iwm, u8 *buf,
1073                                      unsigned long buf_size,
1074                                      struct iwm_wifi_cmd *cmd)
1075 {
1076         struct iwm_umac_cmd_get_channel_list *ch_list =
1077                         (struct iwm_umac_cmd_get_channel_list *)
1078                         (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1079         struct wiphy *wiphy = iwm_to_wiphy(iwm);
1080         struct ieee80211_supported_band *band;
1081         int i;
1082
1083         band = wiphy->bands[IEEE80211_BAND_2GHZ];
1084
1085         for (i = 0; i < band->n_channels; i++) {
1086                 unsigned long ch_mask_0 =
1087                         le32_to_cpu(ch_list->ch[0].channels_mask);
1088                 unsigned long ch_mask_2 =
1089                         le32_to_cpu(ch_list->ch[2].channels_mask);
1090
1091                 if (!test_bit(i, &ch_mask_0))
1092                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1093
1094                 if (!test_bit(i, &ch_mask_2))
1095                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1096         }
1097
1098         band = wiphy->bands[IEEE80211_BAND_5GHZ];
1099
1100         for (i = 0; i < min(band->n_channels, 32); i++) {
1101                 unsigned long ch_mask_1 =
1102                         le32_to_cpu(ch_list->ch[1].channels_mask);
1103                 unsigned long ch_mask_3 =
1104                         le32_to_cpu(ch_list->ch[3].channels_mask);
1105
1106                 if (!test_bit(i, &ch_mask_1))
1107                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1108
1109                 if (!test_bit(i, &ch_mask_3))
1110                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1111         }
1112
1113         return 0;
1114 }
1115
1116 static int iwm_ntf_stop_resume_tx(struct iwm_priv *iwm, u8 *buf,
1117                                   unsigned long buf_size,
1118                                   struct iwm_wifi_cmd *cmd)
1119 {
1120         struct iwm_umac_notif_stop_resume_tx *stp_res_tx =
1121                 (struct iwm_umac_notif_stop_resume_tx *)buf;
1122         struct iwm_sta_info *sta_info;
1123         struct iwm_tid_info *tid_info;
1124         u8 sta_id = STA_ID_N_COLOR_ID(stp_res_tx->sta_id);
1125         u16 tid_msk = le16_to_cpu(stp_res_tx->stop_resume_tid_msk);
1126         int bit, ret = 0;
1127         bool stop = false;
1128
1129         IWM_DBG_NTF(iwm, DBG, "stop/resume notification:\n"
1130                     "\tflags:       0x%x\n"
1131                     "\tSTA id:      %d\n"
1132                     "\tTID bitmask: 0x%x\n",
1133                     stp_res_tx->flags, stp_res_tx->sta_id,
1134                     stp_res_tx->stop_resume_tid_msk);
1135
1136         if (stp_res_tx->flags & UMAC_STOP_TX_FLAG)
1137                 stop = true;
1138
1139         sta_info = &iwm->sta_table[sta_id];
1140         if (!sta_info->valid) {
1141                 IWM_ERR(iwm, "Stoping an invalid STA: %d %d\n",
1142                         sta_id, stp_res_tx->sta_id);
1143                 return -EINVAL;
1144         }
1145
1146         for_each_set_bit(bit, (unsigned long *)&tid_msk, IWM_UMAC_TID_NR) {
1147                 tid_info = &sta_info->tid_info[bit];
1148
1149                 mutex_lock(&tid_info->mutex);
1150                 tid_info->stopped = stop;
1151                 mutex_unlock(&tid_info->mutex);
1152
1153                 if (!stop) {
1154                         struct iwm_tx_queue *txq;
1155                         int queue = iwm_tid_to_queue(bit);
1156
1157                         if (queue < 0)
1158                                 continue;
1159
1160                         txq = &iwm->txq[queue];
1161                         /*
1162                          * If we resume, we have to move our SKBs
1163                          * back to the tx queue and queue some work.
1164                          */
1165                         spin_lock_bh(&txq->lock);
1166                         skb_queue_splice_init(&txq->queue, &txq->stopped_queue);
1167                         spin_unlock_bh(&txq->lock);
1168
1169                         queue_work(txq->wq, &txq->worker);
1170                 }
1171
1172         }
1173
1174         /* We send an ACK only for the stop case */
1175         if (stop)
1176                 ret = iwm_send_umac_stop_resume_tx(iwm, stp_res_tx);
1177
1178         return ret;
1179 }
1180
1181 static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf,
1182                                    unsigned long buf_size,
1183                                    struct iwm_wifi_cmd *cmd)
1184 {
1185         struct iwm_umac_wifi_if *hdr;
1186
1187         if (cmd == NULL) {
1188                 IWM_ERR(iwm, "Couldn't find expected wifi command\n");
1189                 return -EINVAL;
1190         }
1191
1192         hdr = (struct iwm_umac_wifi_if *)cmd->buf.payload;
1193
1194         IWM_DBG_NTF(iwm, DBG, "WIFI_IF_WRAPPER cmd is delivered to UMAC: "
1195                     "oid is 0x%x\n", hdr->oid);
1196
1197         if (hdr->oid <= WIFI_IF_NTFY_MAX) {
1198                 set_bit(hdr->oid, &iwm->wifi_ntfy[0]);
1199                 wake_up_interruptible(&iwm->wifi_ntfy_queue);
1200         } else
1201                 return -EINVAL;
1202
1203         switch (hdr->oid) {
1204         case UMAC_WIFI_IF_CMD_SET_PROFILE:
1205                 iwm->umac_profile_active = 1;
1206                 break;
1207         default:
1208                 break;
1209         }
1210
1211         return 0;
1212 }
1213
1214 #define CT_KILL_DELAY (30 * HZ)
1215 static int iwm_ntf_card_state(struct iwm_priv *iwm, u8 *buf,
1216                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
1217 {
1218         struct wiphy *wiphy = iwm_to_wiphy(iwm);
1219         struct iwm_lmac_card_state *state = (struct iwm_lmac_card_state *)
1220                                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1221         u32 flags = le32_to_cpu(state->flags);
1222
1223         IWM_INFO(iwm, "HW RF Kill %s, CT Kill %s\n",
1224                  flags & IWM_CARD_STATE_HW_DISABLED ? "ON" : "OFF",
1225                  flags & IWM_CARD_STATE_CTKILL_DISABLED ? "ON" : "OFF");
1226
1227         if (flags & IWM_CARD_STATE_CTKILL_DISABLED) {
1228                 /*
1229                  * We got a CTKILL event: We bring the interface down in
1230                  * oder to cool the device down, and try to bring it up
1231                  * 30 seconds later. If it's still too hot, we'll go through
1232                  * this code path again.
1233                  */
1234                 cancel_delayed_work_sync(&iwm->ct_kill_delay);
1235                 schedule_delayed_work(&iwm->ct_kill_delay, CT_KILL_DELAY);
1236         }
1237
1238         wiphy_rfkill_set_hw_state(wiphy, flags &
1239                                   (IWM_CARD_STATE_HW_DISABLED |
1240                                    IWM_CARD_STATE_CTKILL_DISABLED));
1241
1242         return 0;
1243 }
1244
1245 static int iwm_rx_handle_wifi(struct iwm_priv *iwm, u8 *buf,
1246                               unsigned long buf_size)
1247 {
1248         struct iwm_umac_wifi_in_hdr *wifi_hdr;
1249         struct iwm_wifi_cmd *cmd;
1250         u8 source, cmd_id;
1251         u16 seq_num;
1252         u32 count;
1253
1254         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1255         cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1256         source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1257         if (source >= IWM_SRC_NUM) {
1258                 IWM_CRIT(iwm, "invalid source %d\n", source);
1259                 return -EINVAL;
1260         }
1261
1262         if (cmd_id == REPLY_RX_MPDU_CMD)
1263                 trace_iwm_rx_packet(iwm, buf, buf_size);
1264         else if ((cmd_id == UMAC_NOTIFY_OPCODE_RX_TICKET) &&
1265                  (source == UMAC_HDI_IN_SOURCE_FW))
1266                 trace_iwm_rx_ticket(iwm, buf, buf_size);
1267         else
1268                 trace_iwm_rx_wifi_cmd(iwm, wifi_hdr);
1269
1270         count = GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_BYTE_COUNT);
1271         count += sizeof(struct iwm_umac_wifi_in_hdr) -
1272                  sizeof(struct iwm_dev_cmd_hdr);
1273         if (count > buf_size) {
1274                 IWM_CRIT(iwm, "count %d, buf size:%ld\n", count, buf_size);
1275                 return -EINVAL;
1276         }
1277
1278         seq_num = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
1279
1280         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x, seqnum: %d\n",
1281                    cmd_id, source, seq_num);
1282
1283         /*
1284          * If this is a response to a previously sent command, there must
1285          * be a pending command for this sequence number.
1286          */
1287         cmd = iwm_get_pending_wifi_cmd(iwm, seq_num);
1288
1289         /* Notify the caller only for sync commands. */
1290         switch (source) {
1291         case UMAC_HDI_IN_SOURCE_FHRX:
1292                 if (iwm->lmac_handlers[cmd_id] &&
1293                     test_bit(cmd_id, &iwm->lmac_handler_map[0]))
1294                         return iwm_notif_send(iwm, cmd, cmd_id, source,
1295                                               buf, count);
1296                 break;
1297         case UMAC_HDI_IN_SOURCE_FW:
1298                 if (iwm->umac_handlers[cmd_id] &&
1299                     test_bit(cmd_id, &iwm->umac_handler_map[0]))
1300                         return iwm_notif_send(iwm, cmd, cmd_id, source,
1301                                               buf, count);
1302                 break;
1303         case UMAC_HDI_IN_SOURCE_UDMA:
1304                 break;
1305         }
1306
1307         return iwm_rx_handle_resp(iwm, buf, count, cmd);
1308 }
1309
1310 int iwm_rx_handle_resp(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size,
1311                        struct iwm_wifi_cmd *cmd)
1312 {
1313         u8 source, cmd_id;
1314         struct iwm_umac_wifi_in_hdr *wifi_hdr;
1315         int ret = 0;
1316
1317         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1318         cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1319
1320         source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1321
1322         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x\n", cmd_id, source);
1323
1324         switch (source) {
1325         case UMAC_HDI_IN_SOURCE_FHRX:
1326                 if (iwm->lmac_handlers[cmd_id])
1327                         ret = iwm->lmac_handlers[cmd_id]
1328                                         (iwm, buf, buf_size, cmd);
1329                 break;
1330         case UMAC_HDI_IN_SOURCE_FW:
1331                 if (iwm->umac_handlers[cmd_id])
1332                         ret = iwm->umac_handlers[cmd_id]
1333                                         (iwm, buf, buf_size, cmd);
1334                 break;
1335         case UMAC_HDI_IN_SOURCE_UDMA:
1336                 ret = -EINVAL;
1337                 break;
1338         }
1339
1340         kfree(cmd);
1341
1342         return ret;
1343 }
1344
1345 static int iwm_rx_handle_nonwifi(struct iwm_priv *iwm, u8 *buf,
1346                                  unsigned long buf_size)
1347 {
1348         u8 seq_num;
1349         struct iwm_udma_in_hdr *hdr = (struct iwm_udma_in_hdr *)buf;
1350         struct iwm_nonwifi_cmd *cmd;
1351
1352         trace_iwm_rx_nonwifi_cmd(iwm, buf, buf_size);
1353         seq_num = GET_VAL32(hdr->cmd, UDMA_HDI_IN_CMD_NON_WIFI_HW_SEQ_NUM);
1354
1355         /*
1356          * We received a non wifi answer.
1357          * Let's check if there's a pending command for it, and if so
1358          * replace the command payload with the buffer, and then wake the
1359          * callers up.
1360          * That means we only support synchronised non wifi command response
1361          * schemes.
1362          */
1363         list_for_each_entry(cmd, &iwm->nonwifi_pending_cmd, pending)
1364                 if (cmd->seq_num == seq_num) {
1365                         cmd->resp_received = 1;
1366                         cmd->buf.len = buf_size;
1367                         memcpy(cmd->buf.hdr, buf, buf_size);
1368                         wake_up_interruptible(&iwm->nonwifi_queue);
1369                 }
1370
1371         return 0;
1372 }
1373
1374 static int iwm_rx_handle_umac(struct iwm_priv *iwm, u8 *buf,
1375                               unsigned long buf_size)
1376 {
1377         int ret = 0;
1378         u8 op_code;
1379         unsigned long buf_offset = 0;
1380         struct iwm_udma_in_hdr *hdr;
1381
1382         /*
1383          * To allow for a more efficient bus usage, UMAC
1384          * messages are encapsulated into UDMA ones. This
1385          * way we can have several UMAC messages in one bus
1386          * transfer.
1387          * A UDMA frame size is always aligned on 16 bytes,
1388          * and a UDMA frame must not start with a UMAC_PAD_TERMINAL
1389          * word. This is how we parse a bus frame into several
1390          * UDMA ones.
1391          */
1392         while (buf_offset < buf_size) {
1393
1394                 hdr = (struct iwm_udma_in_hdr *)(buf + buf_offset);
1395
1396                 if (iwm_rx_check_udma_hdr(hdr) < 0) {
1397                         IWM_DBG_RX(iwm, DBG, "End of frame\n");
1398                         break;
1399                 }
1400
1401                 op_code = GET_VAL32(hdr->cmd, UMAC_HDI_IN_CMD_OPCODE);
1402
1403                 IWM_DBG_RX(iwm, DBG, "Op code: 0x%x\n", op_code);
1404
1405                 if (op_code == UMAC_HDI_IN_OPCODE_WIFI) {
1406                         ret |= iwm_rx_handle_wifi(iwm, buf + buf_offset,
1407                                                   buf_size - buf_offset);
1408                 } else if (op_code < UMAC_HDI_IN_OPCODE_NONWIFI_MAX) {
1409                         if (GET_VAL32(hdr->cmd,
1410                                       UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) !=
1411                             UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) {
1412                                 IWM_ERR(iwm, "Incorrect hw signature\n");
1413                                 return -EINVAL;
1414                         }
1415                         ret |= iwm_rx_handle_nonwifi(iwm, buf + buf_offset,
1416                                                      buf_size - buf_offset);
1417                 } else {
1418                         IWM_ERR(iwm, "Invalid RX opcode: 0x%x\n", op_code);
1419                         ret |= -EINVAL;
1420                 }
1421
1422                 buf_offset += iwm_rx_resp_size(hdr);
1423         }
1424
1425         return ret;
1426 }
1427
1428 int iwm_rx_handle(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size)
1429 {
1430         struct iwm_udma_in_hdr *hdr;
1431
1432         hdr = (struct iwm_udma_in_hdr *)buf;
1433
1434         switch (le32_to_cpu(hdr->cmd)) {
1435         case UMAC_REBOOT_BARKER:
1436                 if (test_bit(IWM_STATUS_READY, &iwm->status)) {
1437                         IWM_ERR(iwm, "Unexpected BARKER\n");
1438
1439                         schedule_work(&iwm->reset_worker);
1440
1441                         return 0;
1442                 }
1443
1444                 return iwm_notif_send(iwm, NULL, IWM_BARKER_REBOOT_NOTIFICATION,
1445                                       IWM_SRC_UDMA, buf, buf_size);
1446         case UMAC_ACK_BARKER:
1447                 return iwm_notif_send(iwm, NULL, IWM_ACK_BARKER_NOTIFICATION,
1448                                       IWM_SRC_UDMA, NULL, 0);
1449         default:
1450                 IWM_DBG_RX(iwm, DBG, "Received cmd: 0x%x\n", hdr->cmd);
1451                 return iwm_rx_handle_umac(iwm, buf, buf_size);
1452         }
1453
1454         return 0;
1455 }
1456
1457 static const iwm_handler iwm_umac_handlers[] =
1458 {
1459         [UMAC_NOTIFY_OPCODE_ERROR]              = iwm_ntf_error,
1460         [UMAC_NOTIFY_OPCODE_ALIVE]              = iwm_ntf_umac_alive,
1461         [UMAC_NOTIFY_OPCODE_INIT_COMPLETE]      = iwm_ntf_init_complete,
1462         [UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS]   = iwm_ntf_wifi_status,
1463         [UMAC_NOTIFY_OPCODE_WIFI_IF_WRAPPER]    = iwm_ntf_mlme,
1464         [UMAC_NOTIFY_OPCODE_PAGE_DEALLOC]       = iwm_ntf_tx_credit_update,
1465         [UMAC_NOTIFY_OPCODE_RX_TICKET]          = iwm_ntf_rx_ticket,
1466         [UMAC_CMD_OPCODE_RESET]                 = iwm_ntf_umac_reset,
1467         [UMAC_NOTIFY_OPCODE_STATS]              = iwm_ntf_statistics,
1468         [UMAC_CMD_OPCODE_EEPROM_PROXY]          = iwm_ntf_eeprom_proxy,
1469         [UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST]    = iwm_ntf_channel_info_list,
1470         [UMAC_CMD_OPCODE_STOP_RESUME_STA_TX]    = iwm_ntf_stop_resume_tx,
1471         [REPLY_RX_MPDU_CMD]                     = iwm_ntf_rx_packet,
1472         [UMAC_CMD_OPCODE_WIFI_IF_WRAPPER]       = iwm_ntf_wifi_if_wrapper,
1473 };
1474
1475 static const iwm_handler iwm_lmac_handlers[] =
1476 {
1477         [REPLY_TX]                              = iwm_ntf_tx,
1478         [REPLY_ALIVE]                           = iwm_ntf_lmac_version,
1479         [CALIBRATION_RES_NOTIFICATION]          = iwm_ntf_calib_res,
1480         [CALIBRATION_COMPLETE_NOTIFICATION]     = iwm_ntf_calib_complete,
1481         [CALIBRATION_CFG_CMD]                   = iwm_ntf_calib_cfg,
1482         [REPLY_RX_MPDU_CMD]                     = iwm_ntf_rx_packet,
1483         [CARD_STATE_NOTIFICATION]               = iwm_ntf_card_state,
1484 };
1485
1486 void iwm_rx_setup_handlers(struct iwm_priv *iwm)
1487 {
1488         iwm->umac_handlers = (iwm_handler *) iwm_umac_handlers;
1489         iwm->lmac_handlers = (iwm_handler *) iwm_lmac_handlers;
1490 }
1491
1492 static void iwm_remove_iv(struct sk_buff *skb, u32 hdr_total_len)
1493 {
1494         struct ieee80211_hdr *hdr;
1495         unsigned int hdr_len;
1496
1497         hdr = (struct ieee80211_hdr *)skb->data;
1498
1499         if (!ieee80211_has_protected(hdr->frame_control))
1500                 return;
1501
1502         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1503         if (hdr_total_len <= hdr_len)
1504                 return;
1505
1506         memmove(skb->data + (hdr_total_len - hdr_len), skb->data, hdr_len);
1507         skb_pull(skb, (hdr_total_len - hdr_len));
1508 }
1509
1510 static void iwm_rx_adjust_packet(struct iwm_priv *iwm,
1511                                  struct iwm_rx_packet *packet,
1512                                  struct iwm_rx_ticket_node *ticket_node)
1513 {
1514         u32 payload_offset = 0, payload_len;
1515         struct iwm_rx_ticket *ticket = ticket_node->ticket;
1516         struct iwm_rx_mpdu_hdr *mpdu_hdr;
1517         struct ieee80211_hdr *hdr;
1518
1519         mpdu_hdr = (struct iwm_rx_mpdu_hdr *)packet->skb->data;
1520         payload_offset += sizeof(struct iwm_rx_mpdu_hdr);
1521         /* Padding is 0 or 2 bytes */
1522         payload_len = le16_to_cpu(mpdu_hdr->len) +
1523                 (le16_to_cpu(ticket->flags) & IWM_RX_TICKET_PAD_SIZE_MSK);
1524         payload_len -= ticket->tail_len;
1525
1526         IWM_DBG_RX(iwm, DBG, "Packet adjusted, len:%d, offset:%d, "
1527                    "ticket offset:%d ticket tail len:%d\n",
1528                    payload_len, payload_offset, ticket->payload_offset,
1529                    ticket->tail_len);
1530
1531         IWM_HEXDUMP(iwm, DBG, RX, "RAW: ", packet->skb->data, packet->skb->len);
1532
1533         skb_pull(packet->skb, payload_offset);
1534         skb_trim(packet->skb, payload_len);
1535
1536         iwm_remove_iv(packet->skb, ticket->payload_offset);
1537
1538         hdr = (struct ieee80211_hdr *) packet->skb->data;
1539         if (ieee80211_is_data_qos(hdr->frame_control)) {
1540                 /* UMAC handed QOS_DATA frame with 2 padding bytes appended
1541                  * to the qos_ctl field in IEEE 802.11 headers. */
1542                 memmove(packet->skb->data + IEEE80211_QOS_CTL_LEN + 2,
1543                         packet->skb->data,
1544                         ieee80211_hdrlen(hdr->frame_control) -
1545                         IEEE80211_QOS_CTL_LEN);
1546                 hdr = (struct ieee80211_hdr *) skb_pull(packet->skb,
1547                                 IEEE80211_QOS_CTL_LEN + 2);
1548                 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1549         }
1550
1551         IWM_HEXDUMP(iwm, DBG, RX, "ADJUSTED: ",
1552                     packet->skb->data, packet->skb->len);
1553 }
1554
1555 static void classify8023(struct sk_buff *skb)
1556 {
1557         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1558
1559         if (ieee80211_is_data_qos(hdr->frame_control)) {
1560                 u8 *qc = ieee80211_get_qos_ctl(hdr);
1561                 /* frame has qos control */
1562                 skb->priority = *qc & IEEE80211_QOS_CTL_TID_MASK;
1563         } else {
1564                 skb->priority = 0;
1565         }
1566 }
1567
1568 static void iwm_rx_process_amsdu(struct iwm_priv *iwm, struct sk_buff *skb)
1569 {
1570         struct wireless_dev *wdev = iwm_to_wdev(iwm);
1571         struct net_device *ndev = iwm_to_ndev(iwm);
1572         struct sk_buff_head list;
1573         struct sk_buff *frame;
1574
1575         IWM_HEXDUMP(iwm, DBG, RX, "A-MSDU: ", skb->data, skb->len);
1576
1577         __skb_queue_head_init(&list);
1578         ieee80211_amsdu_to_8023s(skb, &list, ndev->dev_addr, wdev->iftype, 0);
1579
1580         while ((frame = __skb_dequeue(&list))) {
1581                 ndev->stats.rx_packets++;
1582                 ndev->stats.rx_bytes += frame->len;
1583
1584                 frame->protocol = eth_type_trans(frame, ndev);
1585                 frame->ip_summed = CHECKSUM_NONE;
1586                 memset(frame->cb, 0, sizeof(frame->cb));
1587
1588                 if (netif_rx_ni(frame) == NET_RX_DROP) {
1589                         IWM_ERR(iwm, "Packet dropped\n");
1590                         ndev->stats.rx_dropped++;
1591                 }
1592         }
1593 }
1594
1595 static void iwm_rx_process_packet(struct iwm_priv *iwm,
1596                                   struct iwm_rx_packet *packet,
1597                                   struct iwm_rx_ticket_node *ticket_node)
1598 {
1599         int ret;
1600         struct sk_buff *skb = packet->skb;
1601         struct wireless_dev *wdev = iwm_to_wdev(iwm);
1602         struct net_device *ndev = iwm_to_ndev(iwm);
1603
1604         IWM_DBG_RX(iwm, DBG, "Processing packet ID %d\n", packet->id);
1605
1606         switch (le16_to_cpu(ticket_node->ticket->action)) {
1607         case IWM_RX_TICKET_RELEASE:
1608                 IWM_DBG_RX(iwm, DBG, "RELEASE packet\n");
1609
1610                 iwm_rx_adjust_packet(iwm, packet, ticket_node);
1611                 skb->dev = iwm_to_ndev(iwm);
1612                 classify8023(skb);
1613
1614                 if (le16_to_cpu(ticket_node->ticket->flags) &
1615                     IWM_RX_TICKET_AMSDU_MSK) {
1616                         iwm_rx_process_amsdu(iwm, skb);
1617                         break;
1618                 }
1619
1620                 ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype);
1621                 if (ret < 0) {
1622                         IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - "
1623                                    "%d\n", ret);
1624                         kfree_skb(packet->skb);
1625                         break;
1626                 }
1627
1628                 IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
1629
1630                 ndev->stats.rx_packets++;
1631                 ndev->stats.rx_bytes += skb->len;
1632
1633                 skb->protocol = eth_type_trans(skb, ndev);
1634                 skb->ip_summed = CHECKSUM_NONE;
1635                 memset(skb->cb, 0, sizeof(skb->cb));
1636
1637                 if (netif_rx_ni(skb) == NET_RX_DROP) {
1638                         IWM_ERR(iwm, "Packet dropped\n");
1639                         ndev->stats.rx_dropped++;
1640                 }
1641                 break;
1642         case IWM_RX_TICKET_DROP:
1643                 IWM_DBG_RX(iwm, DBG, "DROP packet: 0x%x\n",
1644                            le16_to_cpu(ticket_node->ticket->flags));
1645                 kfree_skb(packet->skb);
1646                 break;
1647         default:
1648                 IWM_ERR(iwm, "Unknown ticket action: %d\n",
1649                         le16_to_cpu(ticket_node->ticket->action));
1650                 kfree_skb(packet->skb);
1651         }
1652
1653         kfree(packet);
1654         iwm_rx_ticket_node_free(ticket_node);
1655 }
1656
1657 /*
1658  * Rx data processing:
1659  *
1660  * We're receiving Rx packet from the LMAC, and Rx ticket from
1661  * the UMAC.
1662  * To forward a target data packet upstream (i.e. to the
1663  * kernel network stack), we must have received an Rx ticket
1664  * that tells us we're allowed to release this packet (ticket
1665  * action is IWM_RX_TICKET_RELEASE). The Rx ticket also indicates,
1666  * among other things, where valid data actually starts in the Rx
1667  * packet.
1668  */
1669 void iwm_rx_worker(struct work_struct *work)
1670 {
1671         struct iwm_priv *iwm;
1672         struct iwm_rx_ticket_node *ticket, *next;
1673
1674         iwm = container_of(work, struct iwm_priv, rx_worker);
1675
1676         /*
1677          * We go through the tickets list and if there is a pending
1678          * packet for it, we push it upstream.
1679          * We stop whenever a ticket is missing its packet, as we're
1680          * supposed to send the packets in order.
1681          */
1682         spin_lock(&iwm->ticket_lock);
1683         list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
1684                 struct iwm_rx_packet *packet =
1685                         iwm_rx_packet_get(iwm, le16_to_cpu(ticket->ticket->id));
1686
1687                 if (!packet) {
1688                         IWM_DBG_RX(iwm, DBG, "Skip rx_work: Wait for ticket %d "
1689                                    "to be handled first\n",
1690                                    le16_to_cpu(ticket->ticket->id));
1691                         break;
1692                 }
1693
1694                 list_del(&ticket->node);
1695                 iwm_rx_process_packet(iwm, packet, ticket);
1696         }
1697         spin_unlock(&iwm->ticket_lock);
1698 }
1699