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 = kmemdup(ticket, sizeof(struct iwm_rx_ticket),
 325                                       GFP_KERNEL);
 326         if (!ticket_node->ticket) {
 327                 IWM_ERR(iwm, "Couldn't allocate RX ticket\n");
 328                 kfree(ticket_node);
 329                 return ERR_PTR(-ENOMEM);
 330         }
 331
 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                                 complete->band == UMAC_BAND_2GHZ ?
 548                                         IEEE80211_BAND_2GHZ :
 549                                         IEEE80211_BAND_5GHZ));
 550                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
 551                         /* Associated to a unallowed channel, disassociate. */
 552                         __iwm_invalidate_mlme_profile(iwm);
 553                         IWM_WARN(iwm, "Couldn't associate with %pM due to "
 554                                  "channel %d is disabled. Check your local "
 555                                  "regulatory setting.\n",
 556                                  complete->bssid, complete->channel);
 557                         goto failure;
 558                 }
 559
 560                 set_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 561                 memcpy(iwm->bssid, complete->bssid, ETH_ALEN);
 562                 iwm->channel = complete->channel;
 563
 564                 /* Internal roaming state, avoid notifying SME. */
 565                 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
 566                     && iwm->conf.mode == UMAC_MODE_BSS) {
 567                         cancel_delayed_work(&iwm->disconnect);
 568                         cfg80211_roamed(iwm_to_ndev(iwm), NULL,
 569                                         complete->bssid,
 570                                         iwm->req_ie, iwm->req_ie_len,
 571                                         iwm->resp_ie, iwm->resp_ie_len,
 572                                         GFP_KERNEL);
 573                         break;
 574                 }
 575
 576                 iwm_link_on(iwm);
 577
 578                 if (iwm->conf.mode == UMAC_MODE_IBSS)
 579                         goto ibss;
 580
 581                 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
 582                         cfg80211_connect_result(iwm_to_ndev(iwm),
 583                                                 complete->bssid,
 584                                                 iwm->req_ie, iwm->req_ie_len,
 585                                                 iwm->resp_ie, iwm->resp_ie_len,
 586                                                 WLAN_STATUS_SUCCESS,
 587                                                 GFP_KERNEL);
 588                 else
 589                         cfg80211_roamed(iwm_to_ndev(iwm), NULL,
 590                                         complete->bssid,
 591                                         iwm->req_ie, iwm->req_ie_len,
 592                                         iwm->resp_ie, iwm->resp_ie_len,
 593                                         GFP_KERNEL);
 594                 break;
 595         case UMAC_ASSOC_COMPLETE_FAILURE:
 596  failure:
 597                 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 598                 memset(iwm->bssid, 0, ETH_ALEN);
 599                 iwm->channel = 0;
 600
 601                 /* Internal roaming state, avoid notifying SME. */
 602                 if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
 603                     && iwm->conf.mode == UMAC_MODE_BSS) {
 604                         cancel_delayed_work(&iwm->disconnect);
 605                         break;
 606                 }
 607
 608                 iwm_link_off(iwm);
 609
 610                 if (iwm->conf.mode == UMAC_MODE_IBSS)
 611                         goto ibss;
 612
 613                 if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
 614                         if (!iwm_is_open_wep_profile(iwm)) {
 615                                 cfg80211_connect_result(iwm_to_ndev(iwm),
 616                                                complete->bssid,
 617                                                NULL, 0, NULL, 0,
 618                                                WLAN_STATUS_UNSPECIFIED_FAILURE,
 619                                                GFP_KERNEL);
 620                         } else {
 621                                 /* Let's try shared WEP auth */
 622                                 IWM_ERR(iwm, "Trying WEP shared auth\n");
 623                                 schedule_work(&iwm->auth_retry_worker);
 624                         }
 625                 else
 626                         cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0,
 627                                               GFP_KERNEL);
 628                 break;
 629         default:
 630                 break;
 631         }
 632
 633         clear_bit(IWM_STATUS_RESETTING, &iwm->status);
 634         return 0;
 635
 636  ibss:
 637         cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL);
 638         clear_bit(IWM_STATUS_RESETTING, &iwm->status);
 639         return 0;
 640 }
 641
 642 static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
 643                                        unsigned long buf_size,
 644                                        struct iwm_wifi_cmd *cmd)
 645 {
 646         struct iwm_umac_notif_profile_invalidate *invalid;
 647         u32 reason;
 648
 649         invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
 650         reason = le32_to_cpu(invalid->reason);
 651
 652         IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n", reason);
 653
 654         if (reason != UMAC_PROFILE_INVALID_REQUEST &&
 655             test_bit(IWM_STATUS_SME_CONNECTING, &iwm->status))
 656                 cfg80211_connect_result(iwm_to_ndev(iwm), NULL, NULL, 0, NULL,
 657                                         0, WLAN_STATUS_UNSPECIFIED_FAILURE,
 658                                         GFP_KERNEL);
 659
 660         clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status);
 661         clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 662
 663         iwm->umac_profile_active = 0;
 664         memset(iwm->bssid, 0, ETH_ALEN);
 665         iwm->channel = 0;
 666
 667         iwm_link_off(iwm);
 668
 669         wake_up_interruptible(&iwm->mlme_queue);
 670
 671         return 0;
 672 }
 673
 674 #define IWM_DISCONNECT_INTERVAL (5 * HZ)
 675
 676 static int iwm_mlme_connection_terminated(struct iwm_priv *iwm, u8 *buf,
 677                                           unsigned long buf_size,
 678                                           struct iwm_wifi_cmd *cmd)
 679 {
 680         IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
 681
 682         schedule_delayed_work(&iwm->disconnect, IWM_DISCONNECT_INTERVAL);
 683
 684         return 0;
 685 }
 686
 687 static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf,
 688                                   unsigned long buf_size,
 689                                   struct iwm_wifi_cmd *cmd)
 690 {
 691         int ret;
 692         struct iwm_umac_notif_scan_complete *scan_complete =
 693                 (struct iwm_umac_notif_scan_complete *)buf;
 694         u32 result = le32_to_cpu(scan_complete->result);
 695
 696         IWM_DBG_MLME(iwm, INFO, "type:0x%x result:0x%x seq:%d\n",
 697                      le32_to_cpu(scan_complete->type),
 698                      le32_to_cpu(scan_complete->result),
 699                      scan_complete->seq_num);
 700
 701         if (!test_and_clear_bit(IWM_STATUS_SCANNING, &iwm->status)) {
 702                 IWM_ERR(iwm, "Scan complete while device not scanning\n");
 703                 return -EIO;
 704         }
 705         if (!iwm->scan_request)
 706                 return 0;
 707
 708         ret = iwm_cfg80211_inform_bss(iwm);
 709
 710         cfg80211_scan_done(iwm->scan_request,
 711                            (result & UMAC_SCAN_RESULT_ABORTED) ? 1 : !!ret);
 712         iwm->scan_request = NULL;
 713
 714         return ret;
 715 }
 716
 717 static int iwm_mlme_update_sta_table(struct iwm_priv *iwm, u8 *buf,
 718                                      unsigned long buf_size,
 719                                      struct iwm_wifi_cmd *cmd)
 720 {
 721         struct iwm_umac_notif_sta_info *umac_sta =
 722                         (struct iwm_umac_notif_sta_info *)buf;
 723         struct iwm_sta_info *sta;
 724         int i;
 725
 726         switch (le32_to_cpu(umac_sta->opcode)) {
 727         case UMAC_OPCODE_ADD_MODIFY:
 728                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 729
 730                 IWM_DBG_MLME(iwm, INFO, "%s STA: ID = %d, Color = %d, "
 731                              "addr = %pM, qos = %d\n",
 732                              sta->valid ? "Modify" : "Add",
 733                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 734                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 735                              umac_sta->mac_addr,
 736                              umac_sta->flags & UMAC_STA_FLAG_QOS);
 737
 738                 sta->valid = 1;
 739                 sta->qos = umac_sta->flags & UMAC_STA_FLAG_QOS;
 740                 sta->color = GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR);
 741                 memcpy(sta->addr, umac_sta->mac_addr, ETH_ALEN);
 742                 break;
 743         case UMAC_OPCODE_REMOVE:
 744                 IWM_DBG_MLME(iwm, INFO, "Remove STA: ID = %d, Color = %d, "
 745                              "addr = %pM\n",
 746                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 747                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 748                              umac_sta->mac_addr);
 749
 750                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 751
 752                 if (!memcmp(sta->addr, umac_sta->mac_addr, ETH_ALEN))
 753                         sta->valid = 0;
 754
 755                 break;
 756         case UMAC_OPCODE_CLEAR_ALL:
 757                 for (i = 0; i < IWM_STA_TABLE_NUM; i++)
 758                         iwm->sta_table[i].valid = 0;
 759
 760                 break;
 761         default:
 762                 break;
 763         }
 764
 765         return 0;
 766 }
 767
 768 static int iwm_mlme_medium_lost(struct iwm_priv *iwm, u8 *buf,
 769                                 unsigned long buf_size,
 770                                 struct iwm_wifi_cmd *cmd)
 771 {
 772         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 773
 774         IWM_DBG_NTF(iwm, DBG, "WiFi/WiMax coexistence radio is OFF\n");
 775
 776         wiphy_rfkill_set_hw_state(wiphy, true);
 777
 778         return 0;
 779 }
 780
 781 static int iwm_mlme_update_bss_table(struct iwm_priv *iwm, u8 *buf,
 782                                      unsigned long buf_size,
 783                                      struct iwm_wifi_cmd *cmd)
 784 {
 785         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 786         struct ieee80211_mgmt *mgmt;
 787         struct iwm_umac_notif_bss_info *umac_bss =
 788                         (struct iwm_umac_notif_bss_info *)buf;
 789         struct ieee80211_channel *channel;
 790         struct ieee80211_supported_band *band;
 791         struct iwm_bss_info *bss;
 792         s32 signal;
 793         int freq;
 794         u16 frame_len = le16_to_cpu(umac_bss->frame_len);
 795         size_t bss_len = sizeof(struct iwm_umac_notif_bss_info) + frame_len;
 796
 797         mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf);
 798
 799         IWM_DBG_MLME(iwm, DBG, "New BSS info entry: %pM\n", mgmt->bssid);
 800         IWM_DBG_MLME(iwm, DBG, "\tType: 0x%x\n", le32_to_cpu(umac_bss->type));
 801         IWM_DBG_MLME(iwm, DBG, "\tTimestamp: %d\n",
 802                      le32_to_cpu(umac_bss->timestamp));
 803         IWM_DBG_MLME(iwm, DBG, "\tTable Index: %d\n",
 804                      le16_to_cpu(umac_bss->table_idx));
 805         IWM_DBG_MLME(iwm, DBG, "\tBand: %d\n", umac_bss->band);
 806         IWM_DBG_MLME(iwm, DBG, "\tChannel: %d\n", umac_bss->channel);
 807         IWM_DBG_MLME(iwm, DBG, "\tRSSI: %d\n", umac_bss->rssi);
 808         IWM_DBG_MLME(iwm, DBG, "\tFrame Length: %d\n", frame_len);
 809
 810         list_for_each_entry(bss, &iwm->bss_list, node)
 811                 if (bss->bss->table_idx == umac_bss->table_idx)
 812                         break;
 813
 814         if (&bss->node != &iwm->bss_list) {
 815                 /* Remove the old BSS entry, we will add it back later. */
 816                 list_del(&bss->node);
 817                 kfree(bss->bss);
 818         } else {
 819                 /* New BSS entry */
 820
 821                 bss = kzalloc(sizeof(struct iwm_bss_info), GFP_KERNEL);
 822                 if (!bss) {
 823                         IWM_ERR(iwm, "Couldn't allocate bss_info\n");
 824                         return -ENOMEM;
 825                 }
 826         }
 827
 828         bss->bss = kzalloc(bss_len, GFP_KERNEL);
 829         if (!bss->bss) {
 830                 kfree(bss);
 831                 IWM_ERR(iwm, "Couldn't allocate bss\n");
 832                 return -ENOMEM;
 833         }
 834
 835         INIT_LIST_HEAD(&bss->node);
 836         memcpy(bss->bss, umac_bss, bss_len);
 837
 838         if (umac_bss->band == UMAC_BAND_2GHZ)
 839                 band = wiphy->bands[IEEE80211_BAND_2GHZ];
 840         else if (umac_bss->band == UMAC_BAND_5GHZ)
 841                 band = wiphy->bands[IEEE80211_BAND_5GHZ];
 842         else {
 843                 IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band);
 844                 goto err;
 845         }
 846
 847         freq = ieee80211_channel_to_frequency(umac_bss->channel, band->band);
 848         channel = ieee80211_get_channel(wiphy, freq);
 849         signal = umac_bss->rssi * 100;
 850
 851         bss->cfg_bss = cfg80211_inform_bss_frame(wiphy, channel,
 852                                                  mgmt, frame_len,
 853                                                  signal, GFP_KERNEL);
 854         if (!bss->cfg_bss)
 855                 goto err;
 856
 857         list_add_tail(&bss->node, &iwm->bss_list);
 858
 859         return 0;
 860  err:
 861         kfree(bss->bss);
 862         kfree(bss);
 863
 864         return -EINVAL;
 865 }
 866
 867 static int iwm_mlme_remove_bss(struct iwm_priv *iwm, u8 *buf,
 868                                unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 869 {
 870         struct iwm_umac_notif_bss_removed *bss_rm =
 871                 (struct iwm_umac_notif_bss_removed *)buf;
 872         struct iwm_bss_info *bss, *next;
 873         u16 table_idx;
 874         int i;
 875
 876         for (i = 0; i < le32_to_cpu(bss_rm->count); i++) {
 877                 table_idx = le16_to_cpu(bss_rm->entries[i]) &
 878                             IWM_BSS_REMOVE_INDEX_MSK;
 879                 list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
 880                         if (bss->bss->table_idx == cpu_to_le16(table_idx)) {
 881                                 struct ieee80211_mgmt *mgmt;
 882
 883                                 mgmt = (struct ieee80211_mgmt *)
 884                                         (bss->bss->frame_buf);
 885                                 IWM_DBG_MLME(iwm, ERR, "BSS removed: %pM\n",
 886                                              mgmt->bssid);
 887                                 list_del(&bss->node);
 888                                 kfree(bss->bss);
 889                                 kfree(bss);
 890                         }
 891         }
 892
 893         return 0;
 894 }
 895
 896 static int iwm_mlme_mgt_frame(struct iwm_priv *iwm, u8 *buf,
 897                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 898 {
 899         struct iwm_umac_notif_mgt_frame *mgt_frame =
 900                         (struct iwm_umac_notif_mgt_frame *)buf;
 901         struct ieee80211_mgmt *mgt = (struct ieee80211_mgmt *)mgt_frame->frame;
 902
 903         IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame,
 904                     le16_to_cpu(mgt_frame->len));
 905
 906         if (ieee80211_is_assoc_req(mgt->frame_control)) {
 907                 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
 908                                   - offsetof(struct ieee80211_mgmt,
 909                                              u.assoc_req.variable);
 910                 kfree(iwm->req_ie);
 911                 iwm->req_ie = kmemdup(mgt->u.assoc_req.variable,
 912                                       iwm->req_ie_len, GFP_KERNEL);
 913         } else if (ieee80211_is_reassoc_req(mgt->frame_control)) {
 914                 iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
 915                                   - offsetof(struct ieee80211_mgmt,
 916                                              u.reassoc_req.variable);
 917                 kfree(iwm->req_ie);
 918                 iwm->req_ie = kmemdup(mgt->u.reassoc_req.variable,
 919                                       iwm->req_ie_len, GFP_KERNEL);
 920         } else if (ieee80211_is_assoc_resp(mgt->frame_control)) {
 921                 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
 922                                    - offsetof(struct ieee80211_mgmt,
 923                                               u.assoc_resp.variable);
 924                 kfree(iwm->resp_ie);
 925                 iwm->resp_ie = kmemdup(mgt->u.assoc_resp.variable,
 926                                        iwm->resp_ie_len, GFP_KERNEL);
 927         } else if (ieee80211_is_reassoc_resp(mgt->frame_control)) {
 928                 iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
 929                                    - offsetof(struct ieee80211_mgmt,
 930                                               u.reassoc_resp.variable);
 931                 kfree(iwm->resp_ie);
 932                 iwm->resp_ie = kmemdup(mgt->u.reassoc_resp.variable,
 933                                        iwm->resp_ie_len, GFP_KERNEL);
 934         } else {
 935                 IWM_ERR(iwm, "Unsupported management frame: 0x%x",
 936                         le16_to_cpu(mgt->frame_control));
 937                 return 0;
 938         }
 939
 940         return 0;
 941 }
 942
 943 static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf,
 944                         unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 945 {
 946         struct iwm_umac_notif_wifi_if *notif =
 947                 (struct iwm_umac_notif_wifi_if *)buf;
 948
 949         switch (notif->status) {
 950         case WIFI_IF_NTFY_ASSOC_START:
 951                 return iwm_mlme_assoc_start(iwm, buf, buf_size, cmd);
 952         case WIFI_IF_NTFY_ASSOC_COMPLETE:
 953                 return iwm_mlme_assoc_complete(iwm, buf, buf_size, cmd);
 954         case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE:
 955                 return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd);
 956         case WIFI_IF_NTFY_CONNECTION_TERMINATED:
 957                 return iwm_mlme_connection_terminated(iwm, buf, buf_size, cmd);
 958         case WIFI_IF_NTFY_SCAN_COMPLETE:
 959                 return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd);
 960         case WIFI_IF_NTFY_STA_TABLE_CHANGE:
 961                 return iwm_mlme_update_sta_table(iwm, buf, buf_size, cmd);
 962         case WIFI_IF_NTFY_EXTENDED_IE_REQUIRED:
 963                 IWM_DBG_MLME(iwm, DBG, "Extended IE required\n");
 964                 break;
 965         case WIFI_IF_NTFY_RADIO_PREEMPTION:
 966                 return iwm_mlme_medium_lost(iwm, buf, buf_size, cmd);
 967         case WIFI_IF_NTFY_BSS_TRK_TABLE_CHANGED:
 968                 return iwm_mlme_update_bss_table(iwm, buf, buf_size, cmd);
 969         case WIFI_IF_NTFY_BSS_TRK_ENTRIES_REMOVED:
 970                 return iwm_mlme_remove_bss(iwm, buf, buf_size, cmd);
 971                 break;
 972         case WIFI_IF_NTFY_MGMT_FRAME:
 973                 return iwm_mlme_mgt_frame(iwm, buf, buf_size, cmd);
 974         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_START:
 975         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_COMPLETE:
 976         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_START:
 977         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_RESULT:
 978         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_START:
 979         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_COMPLETE:
 980         case WIFI_DBG_IF_NTFY_CNCT_ATC_START:
 981         case WIFI_DBG_IF_NTFY_COEX_NOTIFICATION:
 982         case WIFI_DBG_IF_NTFY_COEX_HANDLE_ENVELOP:
 983         case WIFI_DBG_IF_NTFY_COEX_HANDLE_RELEASE_ENVELOP:
 984                 IWM_DBG_MLME(iwm, DBG, "MLME debug notification: 0x%x\n",
 985                              notif->status);
 986                 break;
 987         default:
 988                 IWM_ERR(iwm, "Unhandled notification: 0x%x\n", notif->status);
 989                 break;
 990         }
 991
 992         return 0;
 993 }
 994
 995 #define IWM_STATS_UPDATE_INTERVAL               (2 * HZ)
 996
 997 static int iwm_ntf_statistics(struct iwm_priv *iwm, u8 *buf,
 998                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 999 {
1000         struct iwm_umac_notif_stats *stats = (struct iwm_umac_notif_stats *)buf;
1001         struct iw_statistics *wstats = &iwm->wstats;
1002         u16 max_rate = 0;
1003         int i;
1004
1005         IWM_DBG_MLME(iwm, DBG, "Statistics notification received\n");
1006
1007         if (test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) {
1008                 for (i = 0; i < UMAC_NTF_RATE_SAMPLE_NR; i++) {
1009                         max_rate = max_t(u16, max_rate,
1010                                          max(le16_to_cpu(stats->tx_rate[i]),
1011                                              le16_to_cpu(stats->rx_rate[i])));
1012                 }
1013                 /* UMAC passes rate info multiplies by 2 */
1014                 iwm->rate = max_rate >> 1;
1015         }
1016         iwm->txpower = le32_to_cpu(stats->tx_power);
1017
1018         wstats->status = 0;
1019
1020         wstats->discard.nwid = le32_to_cpu(stats->rx_drop_other_bssid);
1021         wstats->discard.code = le32_to_cpu(stats->rx_drop_decode);
1022         wstats->discard.fragment = le32_to_cpu(stats->rx_drop_reassembly);
1023         wstats->discard.retries = le32_to_cpu(stats->tx_drop_max_retry);
1024
1025         wstats->miss.beacon = le32_to_cpu(stats->missed_beacons);
1026
1027         /* according to cfg80211 */
1028         if (stats->rssi_dbm < -110)
1029                 wstats->qual.qual = 0;
1030         else if (stats->rssi_dbm > -40)
1031                 wstats->qual.qual = 70;
1032         else
1033                 wstats->qual.qual = stats->rssi_dbm + 110;
1034
1035         wstats->qual.level = stats->rssi_dbm;
1036         wstats->qual.noise = stats->noise_dbm;
1037         wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
1038
1039         schedule_delayed_work(&iwm->stats_request, IWM_STATS_UPDATE_INTERVAL);
1040
1041         mod_timer(&iwm->watchdog, round_jiffies(jiffies + IWM_WATCHDOG_PERIOD));
1042
1043         return 0;
1044 }
1045
1046 static int iwm_ntf_eeprom_proxy(struct iwm_priv *iwm, u8 *buf,
1047                                 unsigned long buf_size,
1048                                 struct iwm_wifi_cmd *cmd)
1049 {
1050         struct iwm_umac_cmd_eeprom_proxy *eeprom_proxy =
1051                 (struct iwm_umac_cmd_eeprom_proxy *)
1052                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1053         struct iwm_umac_cmd_eeprom_proxy_hdr *hdr = &eeprom_proxy->hdr;
1054         u32 hdr_offset = le32_to_cpu(hdr->offset);
1055         u32 hdr_len = le32_to_cpu(hdr->len);
1056         u32 hdr_type = le32_to_cpu(hdr->type);
1057
1058         IWM_DBG_NTF(iwm, DBG, "type: 0x%x, len: %d, offset: 0x%x\n",
1059                     hdr_type, hdr_len, hdr_offset);
1060
1061         if ((hdr_offset + hdr_len) > IWM_EEPROM_LEN)
1062                 return -EINVAL;
1063
1064         switch (hdr_type) {
1065         case IWM_UMAC_CMD_EEPROM_TYPE_READ:
1066                 memcpy(iwm->eeprom + hdr_offset, eeprom_proxy->buf, hdr_len);
1067                 break;
1068         case IWM_UMAC_CMD_EEPROM_TYPE_WRITE:
1069         default:
1070                 return -ENOTSUPP;
1071         }
1072
1073         return 0;
1074 }
1075
1076 static int iwm_ntf_channel_info_list(struct iwm_priv *iwm, u8 *buf,
1077                                      unsigned long buf_size,
1078                                      struct iwm_wifi_cmd *cmd)
1079 {
1080         struct iwm_umac_cmd_get_channel_list *ch_list =
1081                         (struct iwm_umac_cmd_get_channel_list *)
1082                         (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1083         struct wiphy *wiphy = iwm_to_wiphy(iwm);
1084         struct ieee80211_supported_band *band;
1085         int i;
1086
1087         band = wiphy->bands[IEEE80211_BAND_2GHZ];
1088
1089         for (i = 0; i < band->n_channels; i++) {
1090                 unsigned long ch_mask_0 =
1091                         le32_to_cpu(ch_list->ch[0].channels_mask);
1092                 unsigned long ch_mask_2 =
1093                         le32_to_cpu(ch_list->ch[2].channels_mask);
1094
1095                 if (!test_bit(i, &ch_mask_0))
1096                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1097
1098                 if (!test_bit(i, &ch_mask_2))
1099                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1100         }
1101
1102         band = wiphy->bands[IEEE80211_BAND_5GHZ];
1103
1104         for (i = 0; i < min(band->n_channels, 32); i++) {
1105                 unsigned long ch_mask_1 =
1106                         le32_to_cpu(ch_list->ch[1].channels_mask);
1107                 unsigned long ch_mask_3 =
1108                         le32_to_cpu(ch_list->ch[3].channels_mask);
1109
1110                 if (!test_bit(i, &ch_mask_1))
1111                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
1112
1113                 if (!test_bit(i, &ch_mask_3))
1114                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
1115         }
1116
1117         return 0;
1118 }
1119
1120 static int iwm_ntf_stop_resume_tx(struct iwm_priv *iwm, u8 *buf,
1121                                   unsigned long buf_size,
1122                                   struct iwm_wifi_cmd *cmd)
1123 {
1124         struct iwm_umac_notif_stop_resume_tx *stp_res_tx =
1125                 (struct iwm_umac_notif_stop_resume_tx *)buf;
1126         struct iwm_sta_info *sta_info;
1127         struct iwm_tid_info *tid_info;
1128         u8 sta_id = STA_ID_N_COLOR_ID(stp_res_tx->sta_id);
1129         u16 tid_msk = le16_to_cpu(stp_res_tx->stop_resume_tid_msk);
1130         int bit, ret = 0;
1131         bool stop = false;
1132
1133         IWM_DBG_NTF(iwm, DBG, "stop/resume notification:\n"
1134                     "\tflags:       0x%x\n"
1135                     "\tSTA id:      %d\n"
1136                     "\tTID bitmask: 0x%x\n",
1137                     stp_res_tx->flags, stp_res_tx->sta_id,
1138                     stp_res_tx->stop_resume_tid_msk);
1139
1140         if (stp_res_tx->flags & UMAC_STOP_TX_FLAG)
1141                 stop = true;
1142
1143         sta_info = &iwm->sta_table[sta_id];
1144         if (!sta_info->valid) {
1145                 IWM_ERR(iwm, "Stoping an invalid STA: %d %d\n",
1146                         sta_id, stp_res_tx->sta_id);
1147                 return -EINVAL;
1148         }
1149
1150         for_each_set_bit(bit, (unsigned long *)&tid_msk, IWM_UMAC_TID_NR) {
1151                 tid_info = &sta_info->tid_info[bit];
1152
1153                 mutex_lock(&tid_info->mutex);
1154                 tid_info->stopped = stop;
1155                 mutex_unlock(&tid_info->mutex);
1156
1157                 if (!stop) {
1158                         struct iwm_tx_queue *txq;
1159                         int queue = iwm_tid_to_queue(bit);
1160
1161                         if (queue < 0)
1162                                 continue;
1163
1164                         txq = &iwm->txq[queue];
1165                         /*
1166                          * If we resume, we have to move our SKBs
1167                          * back to the tx queue and queue some work.
1168                          */
1169                         spin_lock_bh(&txq->lock);
1170                         skb_queue_splice_init(&txq->queue, &txq->stopped_queue);
1171                         spin_unlock_bh(&txq->lock);
1172
1173                         queue_work(txq->wq, &txq->worker);
1174                 }
1175
1176         }
1177
1178         /* We send an ACK only for the stop case */
1179         if (stop)
1180                 ret = iwm_send_umac_stop_resume_tx(iwm, stp_res_tx);
1181
1182         return ret;
1183 }
1184
1185 static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf,
1186                                    unsigned long buf_size,
1187                                    struct iwm_wifi_cmd *cmd)
1188 {
1189         struct iwm_umac_wifi_if *hdr;
1190
1191         if (cmd == NULL) {
1192                 IWM_ERR(iwm, "Couldn't find expected wifi command\n");
1193                 return -EINVAL;
1194         }
1195
1196         hdr = (struct iwm_umac_wifi_if *)cmd->buf.payload;
1197
1198         IWM_DBG_NTF(iwm, DBG, "WIFI_IF_WRAPPER cmd is delivered to UMAC: "
1199                     "oid is 0x%x\n", hdr->oid);
1200
1201         set_bit(hdr->oid, &iwm->wifi_ntfy[0]);
1202         wake_up_interruptible(&iwm->wifi_ntfy_queue);
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                                                                         true);
1581
1582         while ((frame = __skb_dequeue(&list))) {
1583                 ndev->stats.rx_packets++;
1584                 ndev->stats.rx_bytes += frame->len;
1585
1586                 frame->protocol = eth_type_trans(frame, ndev);
1587                 frame->ip_summed = CHECKSUM_NONE;
1588                 memset(frame->cb, 0, sizeof(frame->cb));
1589
1590                 if (netif_rx_ni(frame) == NET_RX_DROP) {
1591                         IWM_ERR(iwm, "Packet dropped\n");
1592                         ndev->stats.rx_dropped++;
1593                 }
1594         }
1595 }
1596
1597 static void iwm_rx_process_packet(struct iwm_priv *iwm,
1598                                   struct iwm_rx_packet *packet,
1599                                   struct iwm_rx_ticket_node *ticket_node)
1600 {
1601         int ret;
1602         struct sk_buff *skb = packet->skb;
1603         struct wireless_dev *wdev = iwm_to_wdev(iwm);
1604         struct net_device *ndev = iwm_to_ndev(iwm);
1605
1606         IWM_DBG_RX(iwm, DBG, "Processing packet ID %d\n", packet->id);
1607
1608         switch (le16_to_cpu(ticket_node->ticket->action)) {
1609         case IWM_RX_TICKET_RELEASE:
1610                 IWM_DBG_RX(iwm, DBG, "RELEASE packet\n");
1611
1612                 iwm_rx_adjust_packet(iwm, packet, ticket_node);
1613                 skb->dev = iwm_to_ndev(iwm);
1614                 classify8023(skb);
1615
1616                 if (le16_to_cpu(ticket_node->ticket->flags) &
1617                     IWM_RX_TICKET_AMSDU_MSK) {
1618                         iwm_rx_process_amsdu(iwm, skb);
1619                         break;
1620                 }
1621
1622                 ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype);
1623                 if (ret < 0) {
1624                         IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - "
1625                                    "%d\n", ret);
1626                         kfree_skb(packet->skb);
1627                         break;
1628                 }
1629
1630                 IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
1631
1632                 ndev->stats.rx_packets++;
1633                 ndev->stats.rx_bytes += skb->len;
1634
1635                 skb->protocol = eth_type_trans(skb, ndev);
1636                 skb->ip_summed = CHECKSUM_NONE;
1637                 memset(skb->cb, 0, sizeof(skb->cb));
1638
1639                 if (netif_rx_ni(skb) == NET_RX_DROP) {
1640                         IWM_ERR(iwm, "Packet dropped\n");
1641                         ndev->stats.rx_dropped++;
1642                 }
1643                 break;
1644         case IWM_RX_TICKET_DROP:
1645                 IWM_DBG_RX(iwm, DBG, "DROP packet: 0x%x\n",
1646                            le16_to_cpu(ticket_node->ticket->flags));
1647                 kfree_skb(packet->skb);
1648                 break;
1649         default:
1650                 IWM_ERR(iwm, "Unknown ticket action: %d\n",
1651                         le16_to_cpu(ticket_node->ticket->action));
1652                 kfree_skb(packet->skb);
1653         }
1654
1655         kfree(packet);
1656         iwm_rx_ticket_node_free(ticket_node);
1657 }
1658
1659 /*
1660  * Rx data processing:
1661  *
1662  * We're receiving Rx packet from the LMAC, and Rx ticket from
1663  * the UMAC.
1664  * To forward a target data packet upstream (i.e. to the
1665  * kernel network stack), we must have received an Rx ticket
1666  * that tells us we're allowed to release this packet (ticket
1667  * action is IWM_RX_TICKET_RELEASE). The Rx ticket also indicates,
1668  * among other things, where valid data actually starts in the Rx
1669  * packet.
1670  */
1671 void iwm_rx_worker(struct work_struct *work)
1672 {
1673         struct iwm_priv *iwm;
1674         struct iwm_rx_ticket_node *ticket, *next;
1675
1676         iwm = container_of(work, struct iwm_priv, rx_worker);
1677
1678         /*
1679          * We go through the tickets list and if there is a pending
1680          * packet for it, we push it upstream.
1681          * We stop whenever a ticket is missing its packet, as we're
1682          * supposed to send the packets in order.
1683          */
1684         spin_lock(&iwm->ticket_lock);
1685         list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
1686                 struct iwm_rx_packet *packet =
1687                         iwm_rx_packet_get(iwm, le16_to_cpu(ticket->ticket->id));
1688
1689                 if (!packet) {
1690                         IWM_DBG_RX(iwm, DBG, "Skip rx_work: Wait for ticket %d "
1691                                    "to be handled first\n",
1692                                    le16_to_cpu(ticket->ticket->id));
1693                         break;
1694                 }
1695
1696                 list_del(&ticket->node);
1697                 iwm_rx_process_packet(iwm, packet, ticket);
1698         }
1699         spin_unlock(&iwm->ticket_lock);
1700 }
1701