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                                    __le16_to_cpu(ticket->action) ==
 435                                                         IWM_RX_TICKET_RELEASE ?
 436                                    "RELEASE" : "DROP",
 437                                    ticket->id);
 438                         spin_lock(&iwm->ticket_lock);
 439                         list_add_tail(&ticket_node->node, &iwm->rx_tickets);
 440                         spin_unlock(&iwm->ticket_lock);
 441
 442                         /*
 443                          * We received an Rx ticket, most likely there's
 444                          * a packet pending for it, it's not worth going
 445                          * through the packet hash list to double check.
 446                          * Let's just fire the rx worker..
 447                          */
 448                         schedule_rx = 1;
 449
 450                         break;
 451
 452                 default:
 453                         IWM_ERR(iwm, "Invalid RX ticket action: 0x%x\n",
 454                                 ticket->action);
 455                 }
 456
 457                 ticket++;
 458         }
 459
 460         if (schedule_rx)
 461                 queue_work(iwm->rx_wq, &iwm->rx_worker);
 462
 463         return 0;
 464 }
 465
 466 static int iwm_ntf_rx_packet(struct iwm_priv *iwm, u8 *buf,
 467                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 468 {
 469         struct iwm_umac_wifi_in_hdr *wifi_hdr;
 470         struct iwm_rx_packet *packet;
 471         u16 id, buf_offset;
 472         u32 packet_size;
 473         u8 id_hash;
 474
 475         IWM_DBG_RX(iwm, DBG, "\n");
 476
 477         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
 478         id = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
 479         buf_offset = sizeof(struct iwm_umac_wifi_in_hdr);
 480         packet_size = buf_size - sizeof(struct iwm_umac_wifi_in_hdr);
 481
 482         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, seqnum: %d, packet size: %d\n",
 483                    wifi_hdr->sw_hdr.cmd.cmd, id, packet_size);
 484         IWM_DBG_RX(iwm, DBG, "Packet id: %d\n", id);
 485         IWM_HEXDUMP(iwm, DBG, RX, "PACKET: ", buf + buf_offset, packet_size);
 486
 487         packet = iwm_rx_packet_alloc(iwm, buf + buf_offset, packet_size, id);
 488         if (IS_ERR(packet))
 489                 return PTR_ERR(packet);
 490
 491         id_hash = IWM_RX_ID_GET_HASH(id);
 492         spin_lock(&iwm->packet_lock[id_hash]);
 493         list_add_tail(&packet->node, &iwm->rx_packets[id_hash]);
 494         spin_unlock(&iwm->packet_lock[id_hash]);
 495
 496         /* We might (unlikely) have received the packet _after_ the ticket */
 497         queue_work(iwm->rx_wq, &iwm->rx_worker);
 498
 499         return 0;
 500 }
 501
 502 /* MLME handlers */
 503 static int iwm_mlme_assoc_start(struct iwm_priv *iwm, u8 *buf,
 504                                 unsigned long buf_size,
 505                                 struct iwm_wifi_cmd *cmd)
 506 {
 507         struct iwm_umac_notif_assoc_start *start;
 508
 509         start = (struct iwm_umac_notif_assoc_start *)buf;
 510
 511         IWM_DBG_MLME(iwm, INFO, "Association with %pM Started, reason: %d\n",
 512                      start->bssid, le32_to_cpu(start->roam_reason));
 513
 514         wake_up_interruptible(&iwm->mlme_queue);
 515
 516         return 0;
 517 }
 518
 519 static u8 iwm_is_open_wep_profile(struct iwm_priv *iwm)
 520 {
 521         if ((iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_40 ||
 522              iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_104) &&
 523             (iwm->umac_profile->sec.ucast_cipher ==
 524              iwm->umac_profile->sec.mcast_cipher) &&
 525             (iwm->umac_profile->sec.auth_type == UMAC_AUTH_TYPE_OPEN))
 526                return 1;
 527
 528        return 0;
 529 }
 530
 531 static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
 532                                    unsigned long buf_size,
 533                                    struct iwm_wifi_cmd *cmd)
 534 {
 535         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 536         struct ieee80211_channel *chan;
 537         struct iwm_umac_notif_assoc_complete *complete =
 538                 (struct iwm_umac_notif_assoc_complete *)buf;
 539
 540         IWM_DBG_MLME(iwm, INFO, "Association with %pM completed, status: %d\n",
 541                      complete->bssid, complete->status);
 542
 543         switch (le32_to_cpu(complete->status)) {
 544         case UMAC_ASSOC_COMPLETE_SUCCESS:
 545                 chan = ieee80211_get_channel(wiphy,
 546                         ieee80211_channel_to_frequency(complete->channel));
 547                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
 548                         /* Associated to a unallowed channel, disassociate. */
 549                         __iwm_invalidate_mlme_profile(iwm);
 550                         IWM_WARN(iwm, "Couldn't associate with %pM due to "
 551                                  "channel %d is disabled. Check your local "
 552                                  "regulatory setting.\n",
 553                                  complete->bssid, complete->channel);
 554                         goto failure;
 555                 }
 556
 557                 set_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 558                 memcpy(iwm->bssid, complete->bssid, ETH_ALEN);
 559                 iwm->channel = complete->channel;
 560
 561                 /* Internal roaming state, avoid notifying SME. */
 562                 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
 563                     && iwm->conf.mode == UMAC_MODE_BSS) {
 564                         cancel_delayed_work(&iwm->disconnect);
 565                         cfg80211_roamed(iwm_to_ndev(iwm),
 566                                         complete->bssid,
 567                                         iwm->req_ie, iwm->req_ie_len,
 568                                         iwm->resp_ie, iwm->resp_ie_len,
 569                                         GFP_KERNEL);
 570                         break;
 571                 }
 572
 573                 iwm_link_on(iwm);
 574
 575                 if (iwm->conf.mode == UMAC_MODE_IBSS)
 576                         goto ibss;
 577
 578                 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
 579                         cfg80211_connect_result(iwm_to_ndev(iwm),
 580                                                 complete->bssid,
 581                                                 iwm->req_ie, iwm->req_ie_len,
 582                                                 iwm->resp_ie, iwm->resp_ie_len,
 583                                                 WLAN_STATUS_SUCCESS,
 584                                                 GFP_KERNEL);
 585                 else
 586                         cfg80211_roamed(iwm_to_ndev(iwm),
 587                                         complete->bssid,
 588                                         iwm->req_ie, iwm->req_ie_len,
 589                                         iwm->resp_ie, iwm->resp_ie_len,
 590                                         GFP_KERNEL);
 591                 break;
 592         case UMAC_ASSOC_COMPLETE_FAILURE:
 593  failure:
 594                 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 595                 memset(iwm->bssid, 0, ETH_ALEN);
 596                 iwm->channel = 0;
 597
 598                 /* Internal roaming state, avoid notifying SME. */
 599                 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
 600                     && iwm->conf.mode == UMAC_MODE_BSS) {
 601                         cancel_delayed_work(&iwm->disconnect);
 602                         break;
 603                 }
 604
 605                 iwm_link_off(iwm);
 606
 607                 if (iwm->conf.mode == UMAC_MODE_IBSS)
 608                         goto ibss;
 609
 610                 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
 611                         if (!iwm_is_open_wep_profile(iwm)) {
 612                                 cfg80211_connect_result(iwm_to_ndev(iwm),
 613                                                complete->bssid,
 614                                                NULL, 0, NULL, 0,
 615                                                WLAN_STATUS_UNSPECIFIED_FAILURE,
 616                                                GFP_KERNEL);
 617                         } else {
 618                                 /* Let's try shared WEP auth */
 619                                 IWM_ERR(iwm, "Trying WEP shared auth\n");
 620                                 schedule_work(&iwm->auth_retry_worker);
 621                         }
 622                 else
 623                         cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0,
 624                                               GFP_KERNEL);
 625                 break;
 626         default:
 627                 break;
 628         }
 629
 630         clear_bit(IWM_STATUS_RESETTING, &iwm->status);
 631         return 0;
 632
 633  ibss:
 634         cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL);
 635         clear_bit(IWM_STATUS_RESETTING, &iwm->status);
 636         return 0;
 637 }
 638
 639 static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
 640                                        unsigned long buf_size,
 641                                        struct iwm_wifi_cmd *cmd)
 642 {
 643         struct iwm_umac_notif_profile_invalidate *invalid;
 644         u32 reason;
 645
 646         invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
 647         reason = le32_to_cpu(invalid->reason);
 648
 649         IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n", reason);
 650
 651         if (reason != UMAC_PROFILE_INVALID_REQUEST &&
 652             test_bit(IWM_STATUS_SME_CONNECTING, &iwm->status))
 653                 cfg80211_connect_result(iwm_to_ndev(iwm), NULL, NULL, 0, NULL,
 654                                         0, WLAN_STATUS_UNSPECIFIED_FAILURE,
 655                                         GFP_KERNEL);
 656
 657         clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status);
 658         clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 659
 660         iwm->umac_profile_active = 0;
 661         memset(iwm->bssid, 0, ETH_ALEN);
 662         iwm->channel = 0;
 663
 664         iwm_link_off(iwm);
 665
 666         wake_up_interruptible(&iwm->mlme_queue);
 667
 668         return 0;
 669 }
 670
 671 #define IWM_DISCONNECT_INTERVAL (5 * HZ)
 672
 673 static int iwm_mlme_connection_terminated(struct iwm_priv *iwm, u8 *buf,
 674                                           unsigned long buf_size,
 675                                           struct iwm_wifi_cmd *cmd)
 676 {
 677         IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
 678
 679         schedule_delayed_work(&iwm->disconnect, IWM_DISCONNECT_INTERVAL);
 680
 681         return 0;
 682 }
 683
 684 static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf,
 685                                   unsigned long buf_size,
 686                                   struct iwm_wifi_cmd *cmd)
 687 {
 688         int ret;
 689         struct iwm_umac_notif_scan_complete *scan_complete =
 690                 (struct iwm_umac_notif_scan_complete *)buf;
 691         u32 result = le32_to_cpu(scan_complete->result);
 692
 693         IWM_DBG_MLME(iwm, INFO, "type:0x%x result:0x%x seq:%d\n",
 694                      le32_to_cpu(scan_complete->type),
 695                      le32_to_cpu(scan_complete->result),
 696                      scan_complete->seq_num);
 697
 698         if (!test_and_clear_bit(IWM_STATUS_SCANNING, &iwm->status)) {
 699                 IWM_ERR(iwm, "Scan complete while device not scanning\n");
 700                 return -EIO;
 701         }
 702         if (!iwm->scan_request)
 703                 return 0;
 704
 705         ret = iwm_cfg80211_inform_bss(iwm);
 706
 707         cfg80211_scan_done(iwm->scan_request,
 708                            (result & UMAC_SCAN_RESULT_ABORTED) ? 1 : !!ret);
 709         iwm->scan_request = NULL;
 710
 711         return ret;
 712 }
 713
 714 static int iwm_mlme_update_sta_table(struct iwm_priv *iwm, u8 *buf,
 715                                      unsigned long buf_size,
 716                                      struct iwm_wifi_cmd *cmd)
 717 {
 718         struct iwm_umac_notif_sta_info *umac_sta =
 719                         (struct iwm_umac_notif_sta_info *)buf;
 720         struct iwm_sta_info *sta;
 721         int i;
 722
 723         switch (le32_to_cpu(umac_sta->opcode)) {
 724         case UMAC_OPCODE_ADD_MODIFY:
 725                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 726
 727                 IWM_DBG_MLME(iwm, INFO, "%s STA: ID = %d, Color = %d, "
 728                              "addr = %pM, qos = %d\n",
 729                              sta->valid ? "Modify" : "Add",
 730                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 731                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 732                              umac_sta->mac_addr,
 733                              umac_sta->flags & UMAC_STA_FLAG_QOS);
 734
 735                 sta->valid = 1;
 736                 sta->qos = umac_sta->flags & UMAC_STA_FLAG_QOS;
 737                 sta->color = GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR);
 738                 memcpy(sta->addr, umac_sta->mac_addr, ETH_ALEN);
 739                 break;
 740         case UMAC_OPCODE_REMOVE:
 741                 IWM_DBG_MLME(iwm, INFO, "Remove STA: ID = %d, Color = %d, "
 742                              "addr = %pM\n",
 743                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 744                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 745                              umac_sta->mac_addr);
 746
 747                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 748
 749                 if (!memcmp(sta->addr, umac_sta->mac_addr, ETH_ALEN))
 750                         sta->valid = 0;
 751
 752                 break;
 753         case UMAC_OPCODE_CLEAR_ALL:
 754                 for (i = 0; i < IWM_STA_TABLE_NUM; i++)
 755                         iwm->sta_table[i].valid = 0;
 756
 757                 break;
 758         default:
 759                 break;
 760         }
 761
 762         return 0;
 763 }
 764
 765 static int iwm_mlme_medium_lost(struct iwm_priv *iwm, u8 *buf,
 766                                 unsigned long buf_size,
 767                                 struct iwm_wifi_cmd *cmd)
 768 {
 769         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 770
 771         IWM_DBG_NTF(iwm, DBG, "WiFi/WiMax coexistence radio is OFF\n");
 772
 773         wiphy_rfkill_set_hw_state(wiphy, true);
 774
 775         return 0;
 776 }
 777
 778 static int iwm_mlme_update_bss_table(struct iwm_priv *iwm, u8 *buf,
 779                                      unsigned long buf_size,
 780                                      struct iwm_wifi_cmd *cmd)
 781 {
 782         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 783         struct ieee80211_mgmt *mgmt;
 784         struct iwm_umac_notif_bss_info *umac_bss =
 785                         (struct iwm_umac_notif_bss_info *)buf;
 786         struct ieee80211_channel *channel;
 787         struct ieee80211_supported_band *band;
 788         struct iwm_bss_info *bss;
 789         s32 signal;
 790         int freq;
 791         u16 frame_len = le16_to_cpu(umac_bss->frame_len);
 792         size_t bss_len = sizeof(struct iwm_umac_notif_bss_info) + frame_len;
 793
 794         mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf);
 795
 796         IWM_DBG_MLME(iwm, DBG, "New BSS info entry: %pM\n", mgmt->bssid);
 797         IWM_DBG_MLME(iwm, DBG, "\tType: 0x%x\n", le32_to_cpu(umac_bss->type));
 798         IWM_DBG_MLME(iwm, DBG, "\tTimestamp: %d\n",
 799                      le32_to_cpu(umac_bss->timestamp));
 800         IWM_DBG_MLME(iwm, DBG, "\tTable Index: %d\n",
 801                      le16_to_cpu(umac_bss->table_idx));
 802         IWM_DBG_MLME(iwm, DBG, "\tBand: %d\n", umac_bss->band);
 803         IWM_DBG_MLME(iwm, DBG, "\tChannel: %d\n", umac_bss->channel);
 804         IWM_DBG_MLME(iwm, DBG, "\tRSSI: %d\n", umac_bss->rssi);
 805         IWM_DBG_MLME(iwm, DBG, "\tFrame Length: %d\n", frame_len);
 806
 807         list_for_each_entry(bss, &iwm->bss_list, node)
 808                 if (bss->bss->table_idx == umac_bss->table_idx)
 809                         break;
 810
 811         if (&bss->node != &iwm->bss_list) {
 812                 /* Remove the old BSS entry, we will add it back later. */
 813                 list_del(&bss->node);
 814                 kfree(bss->bss);
 815         } else {
 816                 /* New BSS entry */
 817
 818                 bss = kzalloc(sizeof(struct iwm_bss_info), GFP_KERNEL);
 819                 if (!bss) {
 820                         IWM_ERR(iwm, "Couldn't allocate bss_info\n");
 821                         return -ENOMEM;
 822                 }
 823         }
 824
 825         bss->bss = kzalloc(bss_len, GFP_KERNEL);
 826         if (!bss->bss) {
 827                 kfree(bss);
 828                 IWM_ERR(iwm, "Couldn't allocate bss\n");
 829                 return -ENOMEM;
 830         }
 831
 832         INIT_LIST_HEAD(&bss->node);
 833         memcpy(bss->bss, umac_bss, bss_len);
 834
 835         if (umac_bss->band == UMAC_BAND_2GHZ)
 836                 band = wiphy->bands[IEEE80211_BAND_2GHZ];
 837         else if (umac_bss->band == UMAC_BAND_5GHZ)
 838                 band = wiphy->bands[IEEE80211_BAND_5GHZ];
 839         else {
 840                 IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band);
 841                 goto err;
 842         }
 843
 844         freq = ieee80211_channel_to_frequency(umac_bss->channel);
 845         channel = ieee80211_get_channel(wiphy, freq);
 846         signal = umac_bss->rssi * 100;
 847
 848         bss->cfg_bss = cfg80211_inform_bss_frame(wiphy, channel,
 849                                                  mgmt, frame_len,
 850                                                  signal, GFP_KERNEL);
 851         if (!bss->cfg_bss)
 852                 goto err;
 853
 854         list_add_tail(&bss->node, &iwm->bss_list);
 855
 856         return 0;
 857  err:
 858         kfree(bss->bss);
 859         kfree(bss);
 860
 861         return -EINVAL;
 862 }
 863
 864 static int iwm_mlme_remove_bss(struct iwm_priv *iwm, u8 *buf,
 865                                unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 866 {
 867         struct iwm_umac_notif_bss_removed *bss_rm =
 868                 (struct iwm_umac_notif_bss_removed *)buf;
 869         struct iwm_bss_info *bss, *next;
 870         u16 table_idx;
 871         int i;
 872
 873         for (i = 0; i < le32_to_cpu(bss_rm->count); i++) {
 874                 table_idx = le16_to_cpu(bss_rm->entries[i]) &
 875                             IWM_BSS_REMOVE_INDEX_MSK;
 876                 list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
 877                         if (bss->bss->table_idx == cpu_to_le16(table_idx)) {
 878                                 struct ieee80211_mgmt *mgmt;
 879
 880                                 mgmt = (struct ieee80211_mgmt *)
 881                                         (bss->bss->frame_buf);
 882                                 IWM_DBG_MLME(iwm, ERR, "BSS removed: %pM\n",
 883                                              mgmt->bssid);
 884                                 list_del(&bss->node);
 885                                 kfree(bss->bss);
 886                                 kfree(bss);
 887                         }
 888         }
 889
 890         return 0;
 891 }
 892
 893 static int iwm_mlme_mgt_frame(struct iwm_priv *iwm, u8 *buf,
 894                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 895 {
 896         struct iwm_umac_notif_mgt_frame *mgt_frame =
 897                         (struct iwm_umac_notif_mgt_frame *)buf;
 898         struct ieee80211_mgmt *mgt = (struct ieee80211_mgmt *)mgt_frame->frame;
 899
 900         IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame,
 901                     le16_to_cpu(mgt_frame->len));
 902
 903         if (ieee80211_is_assoc_req(mgt->frame_control)) {
 904                 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
 905                                   - offsetof(struct ieee80211_mgmt,
 906                                              u.assoc_req.variable);
 907                 kfree(iwm->req_ie);
 908                 iwm->req_ie = kmemdup(mgt->u.assoc_req.variable,
 909                                       iwm->req_ie_len, GFP_KERNEL);
 910         } else if (ieee80211_is_reassoc_req(mgt->frame_control)) {
 911                 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
 912                                   - offsetof(struct ieee80211_mgmt,
 913                                              u.reassoc_req.variable);
 914                 kfree(iwm->req_ie);
 915                 iwm->req_ie = kmemdup(mgt->u.reassoc_req.variable,
 916                                       iwm->req_ie_len, GFP_KERNEL);
 917         } else if (ieee80211_is_assoc_resp(mgt->frame_control)) {
 918                 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
 919                                    - offsetof(struct ieee80211_mgmt,
 920                                               u.assoc_resp.variable);
 921                 kfree(iwm->resp_ie);
 922                 iwm->resp_ie = kmemdup(mgt->u.assoc_resp.variable,
 923                                        iwm->resp_ie_len, GFP_KERNEL);
 924         } else if (ieee80211_is_reassoc_resp(mgt->frame_control)) {
 925                 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
 926                                    - offsetof(struct ieee80211_mgmt,
 927                                               u.reassoc_resp.variable);
 928                 kfree(iwm->resp_ie);
 929                 iwm->resp_ie = kmemdup(mgt->u.reassoc_resp.variable,
 930                                        iwm->resp_ie_len, GFP_KERNEL);
 931         } else {
 932                 IWM_ERR(iwm, "Unsupported management frame: 0x%x",
 933                         le16_to_cpu(mgt->frame_control));
 934                 return 0;
 935         }
 936
 937         return 0;
 938 }
 939
 940 static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf,
 941                         unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 942 {
 943         struct iwm_umac_notif_wifi_if *notif =
 944                 (struct iwm_umac_notif_wifi_if *)buf;
 945
 946         switch (notif->status) {
 947         case WIFI_IF_NTFY_ASSOC_START:
 948                 return iwm_mlme_assoc_start(iwm, buf, buf_size, cmd);
 949         case WIFI_IF_NTFY_ASSOC_COMPLETE:
 950                 return iwm_mlme_assoc_complete(iwm, buf, buf_size, cmd);
 951         case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE:
 952                 return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd);
 953         case WIFI_IF_NTFY_CONNECTION_TERMINATED:
 954                 return iwm_mlme_connection_terminated(iwm, buf, buf_size, cmd);
 955         case WIFI_IF_NTFY_SCAN_COMPLETE:
 956                 return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd);
 957         case WIFI_IF_NTFY_STA_TABLE_CHANGE:
 958                 return iwm_mlme_update_sta_table(iwm, buf, buf_size, cmd);
 959         case WIFI_IF_NTFY_EXTENDED_IE_REQUIRED:
 960                 IWM_DBG_MLME(iwm, DBG, "Extended IE required\n");
 961                 break;
 962         case WIFI_IF_NTFY_RADIO_PREEMPTION:
 963                 return iwm_mlme_medium_lost(iwm, buf, buf_size, cmd);
 964         case WIFI_IF_NTFY_BSS_TRK_TABLE_CHANGED:
 965                 return iwm_mlme_update_bss_table(iwm, buf, buf_size, cmd);
 966         case WIFI_IF_NTFY_BSS_TRK_ENTRIES_REMOVED:
 967                 return iwm_mlme_remove_bss(iwm, buf, buf_size, cmd);
 968                 break;
 969         case WIFI_IF_NTFY_MGMT_FRAME:
 970                 return iwm_mlme_mgt_frame(iwm, buf, buf_size, cmd);
 971         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_START:
 972         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_COMPLETE:
 973         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_START:
 974         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_RESULT:
 975         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_START:
 976         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_COMPLETE:
 977         case WIFI_DBG_IF_NTFY_CNCT_ATC_START:
 978         case WIFI_DBG_IF_NTFY_COEX_NOTIFICATION:
 979         case WIFI_DBG_IF_NTFY_COEX_HANDLE_ENVELOP:
 980         case WIFI_DBG_IF_NTFY_COEX_HANDLE_RELEASE_ENVELOP:
 981                 IWM_DBG_MLME(iwm, DBG, "MLME debug notification: 0x%x\n",
 982                              notif->status);
 983                 break;
 984         default:
 985                 IWM_ERR(iwm, "Unhandled notification: 0x%x\n", notif->status);
 986                 break;
 987         }
 988
 989         return 0;
 990 }
 991
 992 #define IWM_STATS_UPDATE_INTERVAL               (2 * HZ)
 993
 994 static int iwm_ntf_statistics(struct iwm_priv *iwm, u8 *buf,
 995                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 996 {
 997         struct iwm_umac_notif_stats *stats = (struct iwm_umac_notif_stats *)buf;
 998         struct iw_statistics *wstats = &iwm->wstats;
 999         u16 max_rate = 0;
1000         int i;
1001
1002         IWM_DBG_MLME(iwm, DBG, "Statistics notification received\n");
1003
1004         if (test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) {
1005                 for (i = 0; i < UMAC_NTF_RATE_SAMPLE_NR; i++) {
1006                         max_rate = max_t(u16, max_rate,
1007                                          max(le16_to_cpu(stats->tx_rate[i]),
1008                                              le16_to_cpu(stats->rx_rate[i])));
1009                 }
1010                 /* UMAC passes rate info multiplies by 2 */
1011                 iwm->rate = max_rate >> 1;
1012         }
1013         iwm->txpower = le32_to_cpu(stats->tx_power);
1014
1015         wstats->status = 0;
1016
1017         wstats->discard.nwid = le32_to_cpu(stats->rx_drop_other_bssid);
1018         wstats->discard.code = le32_to_cpu(stats->rx_drop_decode);
1019         wstats->discard.fragment = le32_to_cpu(stats->rx_drop_reassembly);
1020         wstats->discard.retries = le32_to_cpu(stats->tx_drop_max_retry);
1021
1022         wstats->miss.beacon = le32_to_cpu(stats->missed_beacons);
1023
1024         /* according to cfg80211 */
1025         if (stats->rssi_dbm < -110)
1026                 wstats->qual.qual = 0;
1027         else if (stats->rssi_dbm > -40)
1028                 wstats->qual.qual = 70;
1029         else
1030                 wstats->qual.qual = stats->rssi_dbm + 110;
1031
1032         wstats->qual.level = stats->rssi_dbm;
1033         wstats->qual.noise = stats->noise_dbm;
1034         wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
1035
1036         schedule_delayed_work(&iwm->stats_request, IWM_STATS_UPDATE_INTERVAL);
1037
1038         mod_timer(&iwm->watchdog, round_jiffies(jiffies + IWM_WATCHDOG_PERIOD));
1039
1040         return 0;
1041 }
1042
1043 static int iwm_ntf_eeprom_proxy(struct iwm_priv *iwm, u8 *buf,
1044                                 unsigned long buf_size,
1045                                 struct iwm_wifi_cmd *cmd)
1046 {
1047         struct iwm_umac_cmd_eeprom_proxy *eeprom_proxy =
1048                 (struct iwm_umac_cmd_eeprom_proxy *)
1049                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1050         struct iwm_umac_cmd_eeprom_proxy_hdr *hdr = &eeprom_proxy->hdr;
1051         u32 hdr_offset = le32_to_cpu(hdr->offset);
1052         u32 hdr_len = le32_to_cpu(hdr->len);
1053         u32 hdr_type = le32_to_cpu(hdr->type);
1054
1055         IWM_DBG_NTF(iwm, DBG, "type: 0x%x, len: %d, offset: 0x%x\n",
1056                     hdr_type, hdr_len, hdr_offset);
1057
1058         if ((hdr_offset + hdr_len) > IWM_EEPROM_LEN)
1059                 return -EINVAL;
1060
1061         switch (hdr_type) {
1062         case IWM_UMAC_CMD_EEPROM_TYPE_READ:
1063                 memcpy(iwm->eeprom + hdr_offset, eeprom_proxy->buf, hdr_len);
1064                 break;
1065         case IWM_UMAC_CMD_EEPROM_TYPE_WRITE:
1066         default:
1067                 return -ENOTSUPP;
1068         }
1069
1070         return 0;
1071 }
1072
1073 static int iwm_ntf_channel_info_list(struct iwm_priv *iwm, u8 *buf,
1074                                      unsigned long buf_size,
1075                                      struct iwm_wifi_cmd *cmd)
1076 {
1077         struct iwm_umac_cmd_get_channel_list *ch_list =
1078                         (struct iwm_umac_cmd_get_channel_list *)
1079                         (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1080         struct wiphy *wiphy = iwm_to_wiphy(iwm);
1081         struct ieee80211_supported_band *band;
1082         int i;
1083
1084         band = wiphy->bands[IEEE80211_BAND_2GHZ];
1085
1086         for (i = 0; i < band->n_channels; i++) {
1087                 unsigned long ch_mask_0 =
1088                         le32_to_cpu(ch_list->ch[0].channels_mask);
1089                 unsigned long ch_mask_2 =
1090                         le32_to_cpu(ch_list->ch[2].channels_mask);
1091
1092                 if (!test_bit(i, &ch_mask_0))
1093                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1094
1095                 if (!test_bit(i, &ch_mask_2))
1096                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1097         }
1098
1099         band = wiphy->bands[IEEE80211_BAND_5GHZ];
1100
1101         for (i = 0; i < min(band->n_channels, 32); i++) {
1102                 unsigned long ch_mask_1 =
1103                         le32_to_cpu(ch_list->ch[1].channels_mask);
1104                 unsigned long ch_mask_3 =
1105                         le32_to_cpu(ch_list->ch[3].channels_mask);
1106
1107                 if (!test_bit(i, &ch_mask_1))
1108                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1109
1110                 if (!test_bit(i, &ch_mask_3))
1111                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1112         }
1113
1114         return 0;
1115 }
1116
1117 static int iwm_ntf_stop_resume_tx(struct iwm_priv *iwm, u8 *buf,
1118                                   unsigned long buf_size,
1119                                   struct iwm_wifi_cmd *cmd)
1120 {
1121         struct iwm_umac_notif_stop_resume_tx *stp_res_tx =
1122                 (struct iwm_umac_notif_stop_resume_tx *)buf;
1123         struct iwm_sta_info *sta_info;
1124         struct iwm_tid_info *tid_info;
1125         u8 sta_id = STA_ID_N_COLOR_ID(stp_res_tx->sta_id);
1126         u16 tid_msk = le16_to_cpu(stp_res_tx->stop_resume_tid_msk);
1127         int bit, ret = 0;
1128         bool stop = false;
1129
1130         IWM_DBG_NTF(iwm, DBG, "stop/resume notification:\n"
1131                     "\tflags:       0x%x\n"
1132                     "\tSTA id:      %d\n"
1133                     "\tTID bitmask: 0x%x\n",
1134                     stp_res_tx->flags, stp_res_tx->sta_id,
1135                     stp_res_tx->stop_resume_tid_msk);
1136
1137         if (stp_res_tx->flags & UMAC_STOP_TX_FLAG)
1138                 stop = true;
1139
1140         sta_info = &iwm->sta_table[sta_id];
1141         if (!sta_info->valid) {
1142                 IWM_ERR(iwm, "Stoping an invalid STA: %d %d\n",
1143                         sta_id, stp_res_tx->sta_id);
1144                 return -EINVAL;
1145         }
1146
1147         for_each_set_bit(bit, (unsigned long *)&tid_msk, IWM_UMAC_TID_NR) {
1148                 tid_info = &sta_info->tid_info[bit];
1149
1150                 mutex_lock(&tid_info->mutex);
1151                 tid_info->stopped = stop;
1152                 mutex_unlock(&tid_info->mutex);
1153
1154                 if (!stop) {
1155                         struct iwm_tx_queue *txq;
1156                         int queue = iwm_tid_to_queue(bit);
1157
1158                         if (queue < 0)
1159                                 continue;
1160
1161                         txq = &iwm->txq[queue];
1162                         /*
1163                          * If we resume, we have to move our SKBs
1164                          * back to the tx queue and queue some work.
1165                          */
1166                         spin_lock_bh(&txq->lock);
1167                         skb_queue_splice_init(&txq->queue, &txq->stopped_queue);
1168                         spin_unlock_bh(&txq->lock);
1169
1170                         queue_work(txq->wq, &txq->worker);
1171                 }
1172
1173         }
1174
1175         /* We send an ACK only for the stop case */
1176         if (stop)
1177                 ret = iwm_send_umac_stop_resume_tx(iwm, stp_res_tx);
1178
1179         return ret;
1180 }
1181
1182 static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf,
1183                                    unsigned long buf_size,
1184                                    struct iwm_wifi_cmd *cmd)
1185 {
1186         struct iwm_umac_wifi_if *hdr;
1187
1188         if (cmd == NULL) {
1189                 IWM_ERR(iwm, "Couldn't find expected wifi command\n");
1190                 return -EINVAL;
1191         }
1192
1193         hdr = (struct iwm_umac_wifi_if *)cmd->buf.payload;
1194
1195         IWM_DBG_NTF(iwm, DBG, "WIFI_IF_WRAPPER cmd is delivered to UMAC: "
1196                     "oid is 0x%x\n", hdr->oid);
1197
1198         if (hdr->oid <= WIFI_IF_NTFY_MAX) {
1199                 set_bit(hdr->oid, &iwm->wifi_ntfy[0]);
1200                 wake_up_interruptible(&iwm->wifi_ntfy_queue);
1201         } else
1202                 return -EINVAL;
1203
1204         switch (hdr->oid) {
1205         case UMAC_WIFI_IF_CMD_SET_PROFILE:
1206                 iwm->umac_profile_active = 1;
1207                 break;
1208         default:
1209                 break;
1210         }
1211
1212         return 0;
1213 }
1214
1215 #define CT_KILL_DELAY (30 * HZ)
1216 static int iwm_ntf_card_state(struct iwm_priv *iwm, u8 *buf,
1217                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
1218 {
1219         struct wiphy *wiphy = iwm_to_wiphy(iwm);
1220         struct iwm_lmac_card_state *state = (struct iwm_lmac_card_state *)
1221                                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1222         u32 flags = le32_to_cpu(state->flags);
1223
1224         IWM_INFO(iwm, "HW RF Kill %s, CT Kill %s\n",
1225                  flags & IWM_CARD_STATE_HW_DISABLED ? "ON" : "OFF",
1226                  flags & IWM_CARD_STATE_CTKILL_DISABLED ? "ON" : "OFF");
1227
1228         if (flags & IWM_CARD_STATE_CTKILL_DISABLED) {
1229                 /*
1230                  * We got a CTKILL event: We bring the interface down in
1231                  * oder to cool the device down, and try to bring it up
1232                  * 30 seconds later. If it's still too hot, we'll go through
1233                  * this code path again.
1234                  */
1235                 cancel_delayed_work_sync(&iwm->ct_kill_delay);
1236                 schedule_delayed_work(&iwm->ct_kill_delay, CT_KILL_DELAY);
1237         }
1238
1239         wiphy_rfkill_set_hw_state(wiphy, flags &
1240                                   (IWM_CARD_STATE_HW_DISABLED |
1241                                    IWM_CARD_STATE_CTKILL_DISABLED));
1242
1243         return 0;
1244 }
1245
1246 static int iwm_rx_handle_wifi(struct iwm_priv *iwm, u8 *buf,
1247                               unsigned long buf_size)
1248 {
1249         struct iwm_umac_wifi_in_hdr *wifi_hdr;
1250         struct iwm_wifi_cmd *cmd;
1251         u8 source, cmd_id;
1252         u16 seq_num;
1253         u32 count;
1254
1255         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1256         cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1257         source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1258         if (source >= IWM_SRC_NUM) {
1259                 IWM_CRIT(iwm, "invalid source %d\n", source);
1260                 return -EINVAL;
1261         }
1262
1263         if (cmd_id == REPLY_RX_MPDU_CMD)
1264                 trace_iwm_rx_packet(iwm, buf, buf_size);
1265         else if ((cmd_id == UMAC_NOTIFY_OPCODE_RX_TICKET) &&
1266                  (source == UMAC_HDI_IN_SOURCE_FW))
1267                 trace_iwm_rx_ticket(iwm, buf, buf_size);
1268         else
1269                 trace_iwm_rx_wifi_cmd(iwm, wifi_hdr);
1270
1271         count = GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_BYTE_COUNT);
1272         count += sizeof(struct iwm_umac_wifi_in_hdr) -
1273                  sizeof(struct iwm_dev_cmd_hdr);
1274         if (count > buf_size) {
1275                 IWM_CRIT(iwm, "count %d, buf size:%ld\n", count, buf_size);
1276                 return -EINVAL;
1277         }
1278
1279         seq_num = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
1280
1281         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x, seqnum: %d\n",
1282                    cmd_id, source, seq_num);
1283
1284         /*
1285          * If this is a response to a previously sent command, there must
1286          * be a pending command for this sequence number.
1287          */
1288         cmd = iwm_get_pending_wifi_cmd(iwm, seq_num);
1289
1290         /* Notify the caller only for sync commands. */
1291         switch (source) {
1292         case UMAC_HDI_IN_SOURCE_FHRX:
1293                 if (iwm->lmac_handlers[cmd_id] &&
1294                     test_bit(cmd_id, &iwm->lmac_handler_map[0]))
1295                         return iwm_notif_send(iwm, cmd, cmd_id, source,
1296                                               buf, count);
1297                 break;
1298         case UMAC_HDI_IN_SOURCE_FW:
1299                 if (iwm->umac_handlers[cmd_id] &&
1300                     test_bit(cmd_id, &iwm->umac_handler_map[0]))
1301                         return iwm_notif_send(iwm, cmd, cmd_id, source,
1302                                               buf, count);
1303                 break;
1304         case UMAC_HDI_IN_SOURCE_UDMA:
1305                 break;
1306         }
1307
1308         return iwm_rx_handle_resp(iwm, buf, count, cmd);
1309 }
1310
1311 int iwm_rx_handle_resp(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size,
1312                        struct iwm_wifi_cmd *cmd)
1313 {
1314         u8 source, cmd_id;
1315         struct iwm_umac_wifi_in_hdr *wifi_hdr;
1316         int ret = 0;
1317
1318         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1319         cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1320
1321         source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1322
1323         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x\n", cmd_id, source);
1324
1325         switch (source) {
1326         case UMAC_HDI_IN_SOURCE_FHRX:
1327                 if (iwm->lmac_handlers[cmd_id])
1328                         ret = iwm->lmac_handlers[cmd_id]
1329                                         (iwm, buf, buf_size, cmd);
1330                 break;
1331         case UMAC_HDI_IN_SOURCE_FW:
1332                 if (iwm->umac_handlers[cmd_id])
1333                         ret = iwm->umac_handlers[cmd_id]
1334                                         (iwm, buf, buf_size, cmd);
1335                 break;
1336         case UMAC_HDI_IN_SOURCE_UDMA:
1337                 ret = -EINVAL;
1338                 break;
1339         }
1340
1341         kfree(cmd);
1342
1343         return ret;
1344 }
1345
1346 static int iwm_rx_handle_nonwifi(struct iwm_priv *iwm, u8 *buf,
1347                                  unsigned long buf_size)
1348 {
1349         u8 seq_num;
1350         struct iwm_udma_in_hdr *hdr = (struct iwm_udma_in_hdr *)buf;
1351         struct iwm_nonwifi_cmd *cmd;
1352
1353         trace_iwm_rx_nonwifi_cmd(iwm, buf, buf_size);
1354         seq_num = GET_VAL32(hdr->cmd, UDMA_HDI_IN_CMD_NON_WIFI_HW_SEQ_NUM);
1355
1356         /*
1357          * We received a non wifi answer.
1358          * Let's check if there's a pending command for it, and if so
1359          * replace the command payload with the buffer, and then wake the
1360          * callers up.
1361          * That means we only support synchronised non wifi command response
1362          * schemes.
1363          */
1364         list_for_each_entry(cmd, &iwm->nonwifi_pending_cmd, pending)
1365                 if (cmd->seq_num == seq_num) {
1366                         cmd->resp_received = 1;
1367                         cmd->buf.len = buf_size;
1368                         memcpy(cmd->buf.hdr, buf, buf_size);
1369                         wake_up_interruptible(&iwm->nonwifi_queue);
1370                 }
1371
1372         return 0;
1373 }
1374
1375 static int iwm_rx_handle_umac(struct iwm_priv *iwm, u8 *buf,
1376                               unsigned long buf_size)
1377 {
1378         int ret = 0;
1379         u8 op_code;
1380         unsigned long buf_offset = 0;
1381         struct iwm_udma_in_hdr *hdr;
1382
1383         /*
1384          * To allow for a more efficient bus usage, UMAC
1385          * messages are encapsulated into UDMA ones. This
1386          * way we can have several UMAC messages in one bus
1387          * transfer.
1388          * A UDMA frame size is always aligned on 16 bytes,
1389          * and a UDMA frame must not start with a UMAC_PAD_TERMINAL
1390          * word. This is how we parse a bus frame into several
1391          * UDMA ones.
1392          */
1393         while (buf_offset < buf_size) {
1394
1395                 hdr = (struct iwm_udma_in_hdr *)(buf + buf_offset);
1396
1397                 if (iwm_rx_check_udma_hdr(hdr) < 0) {
1398                         IWM_DBG_RX(iwm, DBG, "End of frame\n");
1399                         break;
1400                 }
1401
1402                 op_code = GET_VAL32(hdr->cmd, UMAC_HDI_IN_CMD_OPCODE);
1403
1404                 IWM_DBG_RX(iwm, DBG, "Op code: 0x%x\n", op_code);
1405
1406                 if (op_code == UMAC_HDI_IN_OPCODE_WIFI) {
1407                         ret |= iwm_rx_handle_wifi(iwm, buf + buf_offset,
1408                                                   buf_size - buf_offset);
1409                 } else if (op_code < UMAC_HDI_IN_OPCODE_NONWIFI_MAX) {
1410                         if (GET_VAL32(hdr->cmd,
1411                                       UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) !=
1412                             UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) {
1413                                 IWM_ERR(iwm, "Incorrect hw signature\n");
1414                                 return -EINVAL;
1415                         }
1416                         ret |= iwm_rx_handle_nonwifi(iwm, buf + buf_offset,
1417                                                      buf_size - buf_offset);
1418                 } else {
1419                         IWM_ERR(iwm, "Invalid RX opcode: 0x%x\n", op_code);
1420                         ret |= -EINVAL;
1421                 }
1422
1423                 buf_offset += iwm_rx_resp_size(hdr);
1424         }
1425
1426         return ret;
1427 }
1428
1429 int iwm_rx_handle(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size)
1430 {
1431         struct iwm_udma_in_hdr *hdr;
1432
1433         hdr = (struct iwm_udma_in_hdr *)buf;
1434
1435         switch (le32_to_cpu(hdr->cmd)) {
1436         case UMAC_REBOOT_BARKER:
1437                 if (test_bit(IWM_STATUS_READY, &iwm->status)) {
1438                         IWM_ERR(iwm, "Unexpected BARKER\n");
1439
1440                         schedule_work(&iwm->reset_worker);
1441
1442                         return 0;
1443                 }
1444
1445                 return iwm_notif_send(iwm, NULL, IWM_BARKER_REBOOT_NOTIFICATION,
1446                                       IWM_SRC_UDMA, buf, buf_size);
1447         case UMAC_ACK_BARKER:
1448                 return iwm_notif_send(iwm, NULL, IWM_ACK_BARKER_NOTIFICATION,
1449                                       IWM_SRC_UDMA, NULL, 0);
1450         default:
1451                 IWM_DBG_RX(iwm, DBG, "Received cmd: 0x%x\n", hdr->cmd);
1452                 return iwm_rx_handle_umac(iwm, buf, buf_size);
1453         }
1454
1455         return 0;
1456 }
1457
1458 static const iwm_handler iwm_umac_handlers[] =
1459 {
1460         [UMAC_NOTIFY_OPCODE_ERROR]              = iwm_ntf_error,
1461         [UMAC_NOTIFY_OPCODE_ALIVE]              = iwm_ntf_umac_alive,
1462         [UMAC_NOTIFY_OPCODE_INIT_COMPLETE]      = iwm_ntf_init_complete,
1463         [UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS]   = iwm_ntf_wifi_status,
1464         [UMAC_NOTIFY_OPCODE_WIFI_IF_WRAPPER]    = iwm_ntf_mlme,
1465         [UMAC_NOTIFY_OPCODE_PAGE_DEALLOC]       = iwm_ntf_tx_credit_update,
1466         [UMAC_NOTIFY_OPCODE_RX_TICKET]          = iwm_ntf_rx_ticket,
1467         [UMAC_CMD_OPCODE_RESET]                 = iwm_ntf_umac_reset,
1468         [UMAC_NOTIFY_OPCODE_STATS]              = iwm_ntf_statistics,
1469         [UMAC_CMD_OPCODE_EEPROM_PROXY]          = iwm_ntf_eeprom_proxy,
1470         [UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST]    = iwm_ntf_channel_info_list,
1471         [UMAC_CMD_OPCODE_STOP_RESUME_STA_TX]    = iwm_ntf_stop_resume_tx,
1472         [REPLY_RX_MPDU_CMD]                     = iwm_ntf_rx_packet,
1473         [UMAC_CMD_OPCODE_WIFI_IF_WRAPPER]       = iwm_ntf_wifi_if_wrapper,
1474 };
1475
1476 static const iwm_handler iwm_lmac_handlers[] =
1477 {
1478         [REPLY_TX]                              = iwm_ntf_tx,
1479         [REPLY_ALIVE]                           = iwm_ntf_lmac_version,
1480         [CALIBRATION_RES_NOTIFICATION]          = iwm_ntf_calib_res,
1481         [CALIBRATION_COMPLETE_NOTIFICATION]     = iwm_ntf_calib_complete,
1482         [CALIBRATION_CFG_CMD]                   = iwm_ntf_calib_cfg,
1483         [REPLY_RX_MPDU_CMD]                     = iwm_ntf_rx_packet,
1484         [CARD_STATE_NOTIFICATION]               = iwm_ntf_card_state,
1485 };
1486
1487 void iwm_rx_setup_handlers(struct iwm_priv *iwm)
1488 {
1489         iwm->umac_handlers = (iwm_handler *) iwm_umac_handlers;
1490         iwm->lmac_handlers = (iwm_handler *) iwm_lmac_handlers;
1491 }
1492
1493 static void iwm_remove_iv(struct sk_buff *skb, u32 hdr_total_len)
1494 {
1495         struct ieee80211_hdr *hdr;
1496         unsigned int hdr_len;
1497
1498         hdr = (struct ieee80211_hdr *)skb->data;
1499
1500         if (!ieee80211_has_protected(hdr->frame_control))
1501                 return;
1502
1503         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1504         if (hdr_total_len <= hdr_len)
1505                 return;
1506
1507         memmove(skb->data + (hdr_total_len - hdr_len), skb->data, hdr_len);
1508         skb_pull(skb, (hdr_total_len - hdr_len));
1509 }
1510
1511 static void iwm_rx_adjust_packet(struct iwm_priv *iwm,
1512                                  struct iwm_rx_packet *packet,
1513                                  struct iwm_rx_ticket_node *ticket_node)
1514 {
1515         u32 payload_offset = 0, payload_len;
1516         struct iwm_rx_ticket *ticket = ticket_node->ticket;
1517         struct iwm_rx_mpdu_hdr *mpdu_hdr;
1518         struct ieee80211_hdr *hdr;
1519
1520         mpdu_hdr = (struct iwm_rx_mpdu_hdr *)packet->skb->data;
1521         payload_offset += sizeof(struct iwm_rx_mpdu_hdr);
1522         /* Padding is 0 or 2 bytes */
1523         payload_len = le16_to_cpu(mpdu_hdr->len) +
1524                 (le16_to_cpu(ticket->flags) & IWM_RX_TICKET_PAD_SIZE_MSK);
1525         payload_len -= ticket->tail_len;
1526
1527         IWM_DBG_RX(iwm, DBG, "Packet adjusted, len:%d, offset:%d, "
1528                    "ticket offset:%d ticket tail len:%d\n",
1529                    payload_len, payload_offset, ticket->payload_offset,
1530                    ticket->tail_len);
1531
1532         IWM_HEXDUMP(iwm, DBG, RX, "RAW: ", packet->skb->data, packet->skb->len);
1533
1534         skb_pull(packet->skb, payload_offset);
1535         skb_trim(packet->skb, payload_len);
1536
1537         iwm_remove_iv(packet->skb, ticket->payload_offset);
1538
1539         hdr = (struct ieee80211_hdr *) packet->skb->data;
1540         if (ieee80211_is_data_qos(hdr->frame_control)) {
1541                 /* UMAC handed QOS_DATA frame with 2 padding bytes appended
1542                  * to the qos_ctl field in IEEE 802.11 headers. */
1543                 memmove(packet->skb->data + IEEE80211_QOS_CTL_LEN + 2,
1544                         packet->skb->data,
1545                         ieee80211_hdrlen(hdr->frame_control) -
1546                         IEEE80211_QOS_CTL_LEN);
1547                 hdr = (struct ieee80211_hdr *) skb_pull(packet->skb,
1548                                 IEEE80211_QOS_CTL_LEN + 2);
1549                 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1550         }
1551
1552         IWM_HEXDUMP(iwm, DBG, RX, "ADJUSTED: ",
1553                     packet->skb->data, packet->skb->len);
1554 }
1555
1556 static void classify8023(struct sk_buff *skb)
1557 {
1558         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1559
1560         if (ieee80211_is_data_qos(hdr->frame_control)) {
1561                 u8 *qc = ieee80211_get_qos_ctl(hdr);
1562                 /* frame has qos control */
1563                 skb->priority = *qc & IEEE80211_QOS_CTL_TID_MASK;
1564         } else {
1565                 skb->priority = 0;
1566         }
1567 }
1568
1569 static void iwm_rx_process_amsdu(struct iwm_priv *iwm, struct sk_buff *skb)
1570 {
1571         struct wireless_dev *wdev = iwm_to_wdev(iwm);
1572         struct net_device *ndev = iwm_to_ndev(iwm);
1573         struct sk_buff_head list;
1574         struct sk_buff *frame;
1575
1576         IWM_HEXDUMP(iwm, DBG, RX, "A-MSDU: ", skb->data, skb->len);
1577
1578         __skb_queue_head_init(&list);
1579         ieee80211_amsdu_to_8023s(skb, &list, ndev->dev_addr, wdev->iftype, 0);
1580
1581         while ((frame = __skb_dequeue(&list))) {
1582                 ndev->stats.rx_packets++;
1583                 ndev->stats.rx_bytes += frame->len;
1584
1585                 frame->protocol = eth_type_trans(frame, ndev);
1586                 frame->ip_summed = CHECKSUM_NONE;
1587                 memset(frame->cb, 0, sizeof(frame->cb));
1588
1589                 if (netif_rx_ni(frame) == NET_RX_DROP) {
1590                         IWM_ERR(iwm, "Packet dropped\n");
1591                         ndev->stats.rx_dropped++;
1592                 }
1593         }
1594 }
1595
1596 static void iwm_rx_process_packet(struct iwm_priv *iwm,
1597                                   struct iwm_rx_packet *packet,
1598                                   struct iwm_rx_ticket_node *ticket_node)
1599 {
1600         int ret;
1601         struct sk_buff *skb = packet->skb;
1602         struct wireless_dev *wdev = iwm_to_wdev(iwm);
1603         struct net_device *ndev = iwm_to_ndev(iwm);
1604
1605         IWM_DBG_RX(iwm, DBG, "Processing packet ID %d\n", packet->id);
1606
1607         switch (le16_to_cpu(ticket_node->ticket->action)) {
1608         case IWM_RX_TICKET_RELEASE:
1609                 IWM_DBG_RX(iwm, DBG, "RELEASE packet\n");
1610
1611                 iwm_rx_adjust_packet(iwm, packet, ticket_node);
1612                 skb->dev = iwm_to_ndev(iwm);
1613                 classify8023(skb);
1614
1615                 if (le16_to_cpu(ticket_node->ticket->flags) &
1616                     IWM_RX_TICKET_AMSDU_MSK) {
1617                         iwm_rx_process_amsdu(iwm, skb);
1618                         break;
1619                 }
1620
1621                 ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype);
1622                 if (ret < 0) {
1623                         IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - "
1624                                    "%d\n", ret);
1625                         kfree_skb(packet->skb);
1626                         break;
1627                 }
1628
1629                 IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
1630
1631                 ndev->stats.rx_packets++;
1632                 ndev->stats.rx_bytes += skb->len;
1633
1634                 skb->protocol = eth_type_trans(skb, ndev);
1635                 skb->ip_summed = CHECKSUM_NONE;
1636                 memset(skb->cb, 0, sizeof(skb->cb));
1637
1638                 if (netif_rx_ni(skb) == NET_RX_DROP) {
1639                         IWM_ERR(iwm, "Packet dropped\n");
1640                         ndev->stats.rx_dropped++;
1641                 }
1642                 break;
1643         case IWM_RX_TICKET_DROP:
1644                 IWM_DBG_RX(iwm, DBG, "DROP packet: 0x%x\n",
1645                            le16_to_cpu(ticket_node->ticket->flags));
1646                 kfree_skb(packet->skb);
1647                 break;
1648         default:
1649                 IWM_ERR(iwm, "Unknown ticket action: %d\n",
1650                         le16_to_cpu(ticket_node->ticket->action));
1651                 kfree_skb(packet->skb);
1652         }
1653
1654         kfree(packet);
1655         iwm_rx_ticket_node_free(ticket_node);
1656 }
1657
1658 /*
1659  * Rx data processing:
1660  *
1661  * We're receiving Rx packet from the LMAC, and Rx ticket from
1662  * the UMAC.
1663  * To forward a target data packet upstream (i.e. to the
1664  * kernel network stack), we must have received an Rx ticket
1665  * that tells us we're allowed to release this packet (ticket
1666  * action is IWM_RX_TICKET_RELEASE). The Rx ticket also indicates,
1667  * among other things, where valid data actually starts in the Rx
1668  * packet.
1669  */
1670 void iwm_rx_worker(struct work_struct *work)
1671 {
1672         struct iwm_priv *iwm;
1673         struct iwm_rx_ticket_node *ticket, *next;
1674
1675         iwm = container_of(work, struct iwm_priv, rx_worker);
1676
1677         /*
1678          * We go through the tickets list and if there is a pending
1679          * packet for it, we push it upstream.
1680          * We stop whenever a ticket is missing its packet, as we're
1681          * supposed to send the packets in order.
1682          */
1683         spin_lock(&iwm->ticket_lock);
1684         list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
1685                 struct iwm_rx_packet *packet =
1686                         iwm_rx_packet_get(iwm, le16_to_cpu(ticket->ticket->id));
1687
1688                 if (!packet) {
1689                         IWM_DBG_RX(iwm, DBG, "Skip rx_work: Wait for ticket %d "
1690                                    "to be handled first\n",
1691                                    le16_to_cpu(ticket->ticket->id));
1692                         break;
1693                 }
1694
1695                 list_del(&ticket->node);
1696                 iwm_rx_process_packet(iwm, packet, ticket);
1697         }
1698         spin_unlock(&iwm->ticket_lock);
1699 }
1700