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