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/etherdevice.h>
  42 #include <linux/wireless.h>
  43 #include <linux/ieee80211.h>
  44 #include <linux/if_arp.h>
  45 #include <linux/list.h>
  46 #include <net/iw_handler.h>
  47
  48 #include "iwm.h"
  49 #include "debug.h"
  50 #include "hal.h"
  51 #include "umac.h"
  52 #include "lmac.h"
  53 #include "commands.h"
  54 #include "rx.h"
  55 #include "cfg80211.h"
  56 #include "eeprom.h"
  57
  58 static int iwm_rx_check_udma_hdr(struct iwm_udma_in_hdr *hdr)
  59 {
  60         if ((le32_to_cpu(hdr->cmd) == UMAC_PAD_TERMINAL) ||
  61             (le32_to_cpu(hdr->size) == UMAC_PAD_TERMINAL))
  62                 return -EINVAL;
  63
  64         return 0;
  65 }
  66
  67 static inline int iwm_rx_resp_size(struct iwm_udma_in_hdr *hdr)
  68 {
  69         return ALIGN(le32_to_cpu(hdr->size) + sizeof(struct iwm_udma_in_hdr),
  70                      16);
  71 }
  72
  73 /*
  74  * Notification handlers:
  75  *
  76  * For every possible notification we can receive from the
  77  * target, we have a handler.
  78  * When we get a target notification, and there is no one
  79  * waiting for it, it's just processed through the rx code
  80  * path:
  81  *
  82  * iwm_rx_handle()
  83  *  -> iwm_rx_handle_umac()
  84  *      -> iwm_rx_handle_wifi()
  85  *          -> iwm_rx_handle_resp()
  86  *              -> iwm_ntf_*()
  87  *
  88  *      OR
  89  *
  90  *      -> iwm_rx_handle_non_wifi()
  91  *
  92  * If there are processes waiting for this notification, then
  93  * iwm_rx_handle_wifi() just wakes those processes up and they
  94  * grab the pending notification.
  95  */
  96 static int iwm_ntf_error(struct iwm_priv *iwm, u8 *buf,
  97                          unsigned long buf_size, struct iwm_wifi_cmd *cmd)
  98 {
  99         struct iwm_umac_notif_error *error;
 100         struct iwm_fw_error_hdr *fw_err;
 101
 102         error = (struct iwm_umac_notif_error *)buf;
 103         fw_err = &error->err;
 104
 105
 106         IWM_ERR(iwm, "%cMAC FW ERROR:\n",
 107          (le32_to_cpu(fw_err->category) == UMAC_SYS_ERR_CAT_LMAC) ? 'L' : 'U');
 108         IWM_ERR(iwm, "\tCategory:    %d\n", le32_to_cpu(fw_err->category));
 109         IWM_ERR(iwm, "\tStatus:      0x%x\n", le32_to_cpu(fw_err->status));
 110         IWM_ERR(iwm, "\tPC:          0x%x\n", le32_to_cpu(fw_err->pc));
 111         IWM_ERR(iwm, "\tblink1:      %d\n", le32_to_cpu(fw_err->blink1));
 112         IWM_ERR(iwm, "\tblink2:      %d\n", le32_to_cpu(fw_err->blink2));
 113         IWM_ERR(iwm, "\tilink1:      %d\n", le32_to_cpu(fw_err->ilink1));
 114         IWM_ERR(iwm, "\tilink2:      %d\n", le32_to_cpu(fw_err->ilink2));
 115         IWM_ERR(iwm, "\tData1:       0x%x\n", le32_to_cpu(fw_err->data1));
 116         IWM_ERR(iwm, "\tData2:       0x%x\n", le32_to_cpu(fw_err->data2));
 117         IWM_ERR(iwm, "\tLine number: %d\n", le32_to_cpu(fw_err->line_num));
 118         IWM_ERR(iwm, "\tUMAC status: 0x%x\n", le32_to_cpu(fw_err->umac_status));
 119         IWM_ERR(iwm, "\tLMAC status: 0x%x\n", le32_to_cpu(fw_err->lmac_status));
 120         IWM_ERR(iwm, "\tSDIO status: 0x%x\n", le32_to_cpu(fw_err->sdio_status));
 121
 122         return 0;
 123 }
 124
 125 static int iwm_ntf_umac_alive(struct iwm_priv *iwm, u8 *buf,
 126                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 127 {
 128         struct iwm_umac_notif_alive *alive_resp =
 129                         (struct iwm_umac_notif_alive *)(buf);
 130         u16 status = le16_to_cpu(alive_resp->status);
 131
 132         if (status == UMAC_NTFY_ALIVE_STATUS_ERR) {
 133                 IWM_ERR(iwm, "Receive error UMAC_ALIVE\n");
 134                 return -EIO;
 135         }
 136
 137         iwm_tx_credit_init_pools(iwm, alive_resp);
 138
 139         return 0;
 140 }
 141
 142 static int iwm_ntf_init_complete(struct iwm_priv *iwm, u8 *buf,
 143                                  unsigned long buf_size,
 144                                  struct iwm_wifi_cmd *cmd)
 145 {
 146         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 147         struct iwm_umac_notif_init_complete *init_complete =
 148                         (struct iwm_umac_notif_init_complete *)(buf);
 149         u16 status = le16_to_cpu(init_complete->status);
 150         bool blocked = (status == UMAC_NTFY_INIT_COMPLETE_STATUS_ERR);
 151
 152         if (blocked)
 153                 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is on (radio off)\n");
 154         else
 155                 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is off (radio on)\n");
 156
 157         wiphy_rfkill_set_hw_state(wiphy, blocked);
 158
 159         return 0;
 160 }
 161
 162 static int iwm_ntf_tx_credit_update(struct iwm_priv *iwm, u8 *buf,
 163                                     unsigned long buf_size,
 164                                     struct iwm_wifi_cmd *cmd)
 165 {
 166         int pool_nr, total_freed_pages;
 167         unsigned long pool_map;
 168         int i, id;
 169         struct iwm_umac_notif_page_dealloc *dealloc =
 170                         (struct iwm_umac_notif_page_dealloc *)buf;
 171
 172         pool_nr = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_CNT);
 173         pool_map = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_MSK);
 174
 175         IWM_DBG_TX(iwm, DBG, "UMAC dealloc notification: pool nr %d, "
 176                    "update map 0x%lx\n", pool_nr, pool_map);
 177
 178         spin_lock(&iwm->tx_credit.lock);
 179
 180         for (i = 0; i < pool_nr; i++) {
 181                 id = GET_VAL32(dealloc->grp_info[i],
 182                                UMAC_DEALLOC_NTFY_GROUP_NUM);
 183                 if (test_bit(id, &pool_map)) {
 184                         total_freed_pages = GET_VAL32(dealloc->grp_info[i],
 185                                               UMAC_DEALLOC_NTFY_PAGE_CNT);
 186                         iwm_tx_credit_inc(iwm, id, total_freed_pages);
 187                 }
 188         }
 189
 190         spin_unlock(&iwm->tx_credit.lock);
 191
 192         return 0;
 193 }
 194
 195 static int iwm_ntf_umac_reset(struct iwm_priv *iwm, u8 *buf,
 196                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 197 {
 198         IWM_DBG_NTF(iwm, DBG, "UMAC RESET done\n");
 199
 200         return 0;
 201 }
 202
 203 static int iwm_ntf_lmac_version(struct iwm_priv *iwm, u8 *buf,
 204                                 unsigned long buf_size,
 205                                 struct iwm_wifi_cmd *cmd)
 206 {
 207         IWM_DBG_NTF(iwm, INFO, "LMAC Version: %x.%x\n", buf[9], buf[8]);
 208
 209         return 0;
 210 }
 211
 212 static int iwm_ntf_tx(struct iwm_priv *iwm, u8 *buf,
 213                       unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 214 {
 215         struct iwm_lmac_tx_resp *tx_resp;
 216         struct iwm_umac_wifi_in_hdr *hdr;
 217
 218         tx_resp = (struct iwm_lmac_tx_resp *)
 219                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 220         hdr = (struct iwm_umac_wifi_in_hdr *)buf;
 221
 222         IWM_DBG_NTF(iwm, DBG, "REPLY_TX, buf size: %lu\n", buf_size);
 223
 224         IWM_DBG_NTF(iwm, DBG, "Seqnum: %d\n",
 225                     le16_to_cpu(hdr->sw_hdr.cmd.seq_num));
 226         IWM_DBG_NTF(iwm, DBG, "\tFrame cnt: %d\n", tx_resp->frame_cnt);
 227         IWM_DBG_NTF(iwm, DBG, "\tRetry cnt: %d\n",
 228                     le16_to_cpu(tx_resp->retry_cnt));
 229         IWM_DBG_NTF(iwm, DBG, "\tSeq ctl: %d\n", le16_to_cpu(tx_resp->seq_ctl));
 230         IWM_DBG_NTF(iwm, DBG, "\tByte cnt: %d\n",
 231                     le16_to_cpu(tx_resp->byte_cnt));
 232         IWM_DBG_NTF(iwm, DBG, "\tStatus: 0x%x\n", le32_to_cpu(tx_resp->status));
 233
 234         return 0;
 235 }
 236
 237
 238 static int iwm_ntf_calib_res(struct iwm_priv *iwm, u8 *buf,
 239                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 240 {
 241         u8 opcode;
 242         u8 *calib_buf;
 243         struct iwm_lmac_calib_hdr *hdr = (struct iwm_lmac_calib_hdr *)
 244                                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 245
 246         opcode = hdr->opcode;
 247
 248         BUG_ON(opcode >= CALIBRATION_CMD_NUM ||
 249                opcode < PHY_CALIBRATE_OPCODES_NUM);
 250
 251         IWM_DBG_NTF(iwm, DBG, "Store calibration result for opcode: %d\n",
 252                     opcode);
 253
 254         buf_size -= sizeof(struct iwm_umac_wifi_in_hdr);
 255         calib_buf = iwm->calib_res[opcode].buf;
 256
 257         if (!calib_buf || (iwm->calib_res[opcode].size < buf_size)) {
 258                 kfree(calib_buf);
 259                 calib_buf = kzalloc(buf_size, GFP_KERNEL);
 260                 if (!calib_buf) {
 261                         IWM_ERR(iwm, "Memory allocation failed: calib_res\n");
 262                         return -ENOMEM;
 263                 }
 264                 iwm->calib_res[opcode].buf = calib_buf;
 265                 iwm->calib_res[opcode].size = buf_size;
 266         }
 267
 268         memcpy(calib_buf, hdr, buf_size);
 269         set_bit(opcode - PHY_CALIBRATE_OPCODES_NUM, &iwm->calib_done_map);
 270
 271         return 0;
 272 }
 273
 274 static int iwm_ntf_calib_complete(struct iwm_priv *iwm, u8 *buf,
 275                                   unsigned long buf_size,
 276                                   struct iwm_wifi_cmd *cmd)
 277 {
 278         IWM_DBG_NTF(iwm, DBG, "Calibration completed\n");
 279
 280         return 0;
 281 }
 282
 283 static int iwm_ntf_calib_cfg(struct iwm_priv *iwm, u8 *buf,
 284                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 285 {
 286         struct iwm_lmac_cal_cfg_resp *cal_resp;
 287
 288         cal_resp = (struct iwm_lmac_cal_cfg_resp *)
 289                         (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 290
 291         IWM_DBG_NTF(iwm, DBG, "Calibration CFG command status: %d\n",
 292                     le32_to_cpu(cal_resp->status));
 293
 294         return 0;
 295 }
 296
 297 static int iwm_ntf_wifi_status(struct iwm_priv *iwm, u8 *buf,
 298                                unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 299 {
 300         struct iwm_umac_notif_wifi_status *status =
 301                 (struct iwm_umac_notif_wifi_status *)buf;
 302
 303         iwm->core_enabled |= le16_to_cpu(status->status);
 304
 305         return 0;
 306 }
 307
 308 static struct iwm_rx_ticket_node *
 309 iwm_rx_ticket_node_alloc(struct iwm_priv *iwm, struct iwm_rx_ticket *ticket)
 310 {
 311         struct iwm_rx_ticket_node *ticket_node;
 312
 313         ticket_node = kzalloc(sizeof(struct iwm_rx_ticket_node), GFP_KERNEL);
 314         if (!ticket_node) {
 315                 IWM_ERR(iwm, "Couldn't allocate ticket node\n");
 316                 return ERR_PTR(-ENOMEM);
 317         }
 318
 319         ticket_node->ticket = kzalloc(sizeof(struct iwm_rx_ticket), GFP_KERNEL);
 320         if (!ticket_node->ticket) {
 321                 IWM_ERR(iwm, "Couldn't allocate RX ticket\n");
 322                 kfree(ticket_node);
 323                 return ERR_PTR(-ENOMEM);
 324         }
 325
 326         memcpy(ticket_node->ticket, ticket, sizeof(struct iwm_rx_ticket));
 327         INIT_LIST_HEAD(&ticket_node->node);
 328
 329         return ticket_node;
 330 }
 331
 332 static void iwm_rx_ticket_node_free(struct iwm_rx_ticket_node *ticket_node)
 333 {
 334         kfree(ticket_node->ticket);
 335         kfree(ticket_node);
 336 }
 337
 338 static struct iwm_rx_packet *iwm_rx_packet_get(struct iwm_priv *iwm, u16 id)
 339 {
 340         u8 id_hash = IWM_RX_ID_GET_HASH(id);
 341         struct list_head *packet_list;
 342         struct iwm_rx_packet *packet, *next;
 343
 344         packet_list = &iwm->rx_packets[id_hash];
 345
 346         list_for_each_entry_safe(packet, next, packet_list, node)
 347                 if (packet->id == id)
 348                         return packet;
 349
 350         return NULL;
 351 }
 352
 353 static struct iwm_rx_packet *iwm_rx_packet_alloc(struct iwm_priv *iwm, u8 *buf,
 354                                                  u32 size, u16 id)
 355 {
 356         struct iwm_rx_packet *packet;
 357
 358         packet = kzalloc(sizeof(struct iwm_rx_packet), GFP_KERNEL);
 359         if (!packet) {
 360                 IWM_ERR(iwm, "Couldn't allocate packet\n");
 361                 return ERR_PTR(-ENOMEM);
 362         }
 363
 364         packet->skb = dev_alloc_skb(size);
 365         if (!packet->skb) {
 366                 IWM_ERR(iwm, "Couldn't allocate packet SKB\n");
 367                 kfree(packet);
 368                 return ERR_PTR(-ENOMEM);
 369         }
 370
 371         packet->pkt_size = size;
 372
 373         skb_put(packet->skb, size);
 374         memcpy(packet->skb->data, buf, size);
 375         INIT_LIST_HEAD(&packet->node);
 376         packet->id = id;
 377
 378         return packet;
 379 }
 380
 381 void iwm_rx_free(struct iwm_priv *iwm)
 382 {
 383         struct iwm_rx_ticket_node *ticket, *nt;
 384         struct iwm_rx_packet *packet, *np;
 385         int i;
 386
 387         list_for_each_entry_safe(ticket, nt, &iwm->rx_tickets, node) {
 388                 list_del(&ticket->node);
 389                 iwm_rx_ticket_node_free(ticket);
 390         }
 391
 392         for (i = 0; i < IWM_RX_ID_HASH; i++) {
 393                 list_for_each_entry_safe(packet, np, &iwm->rx_packets[i],
 394                                          node) {
 395                         list_del(&packet->node);
 396                         kfree_skb(packet->skb);
 397                         kfree(packet);
 398                 }
 399         }
 400 }
 401
 402 static int iwm_ntf_rx_ticket(struct iwm_priv *iwm, u8 *buf,
 403                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 404 {
 405         struct iwm_umac_notif_rx_ticket *ntf_rx_ticket =
 406                 (struct iwm_umac_notif_rx_ticket *)buf;
 407         struct iwm_rx_ticket *ticket =
 408                 (struct iwm_rx_ticket *)ntf_rx_ticket->tickets;
 409         int i, schedule_rx = 0;
 410
 411         for (i = 0; i < ntf_rx_ticket->num_tickets; i++) {
 412                 struct iwm_rx_ticket_node *ticket_node;
 413
 414                 switch (le16_to_cpu(ticket->action)) {
 415                 case IWM_RX_TICKET_RELEASE:
 416                 case IWM_RX_TICKET_DROP:
 417                         /* We can push the packet to the stack */
 418                         ticket_node = iwm_rx_ticket_node_alloc(iwm, ticket);
 419                         if (IS_ERR(ticket_node))
 420                                 return PTR_ERR(ticket_node);
 421
 422                         IWM_DBG_NTF(iwm, DBG, "TICKET RELEASE(%d)\n",
 423                                     ticket->id);
 424                         list_add_tail(&ticket_node->node, &iwm->rx_tickets);
 425
 426                         /*
 427                          * We received an Rx ticket, most likely there's
 428                          * a packet pending for it, it's not worth going
 429                          * through the packet hash list to double check.
 430                          * Let's just fire the rx worker..
 431                          */
 432                         schedule_rx = 1;
 433
 434                         break;
 435
 436                 default:
 437                         IWM_ERR(iwm, "Invalid RX ticket action: 0x%x\n",
 438                                 ticket->action);
 439                 }
 440
 441                 ticket++;
 442         }
 443
 444         if (schedule_rx)
 445                 queue_work(iwm->rx_wq, &iwm->rx_worker);
 446
 447         return 0;
 448 }
 449
 450 static int iwm_ntf_rx_packet(struct iwm_priv *iwm, u8 *buf,
 451                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 452 {
 453         struct iwm_umac_wifi_in_hdr *wifi_hdr;
 454         struct iwm_rx_packet *packet;
 455         u16 id, buf_offset;
 456         u32 packet_size;
 457
 458         IWM_DBG_NTF(iwm, DBG, "\n");
 459
 460         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
 461         id = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
 462         buf_offset = sizeof(struct iwm_umac_wifi_in_hdr);
 463         packet_size = buf_size - sizeof(struct iwm_umac_wifi_in_hdr);
 464
 465         IWM_DBG_NTF(iwm, DBG, "CMD:0x%x, seqnum: %d, packet size: %d\n",
 466                     wifi_hdr->sw_hdr.cmd.cmd, id, packet_size);
 467         IWM_DBG_RX(iwm, DBG, "Packet id: %d\n", id);
 468         IWM_HEXDUMP(iwm, DBG, RX, "PACKET: ", buf + buf_offset, packet_size);
 469
 470         packet = iwm_rx_packet_alloc(iwm, buf + buf_offset, packet_size, id);
 471         if (IS_ERR(packet))
 472                 return PTR_ERR(packet);
 473
 474         list_add_tail(&packet->node, &iwm->rx_packets[IWM_RX_ID_GET_HASH(id)]);
 475
 476         /* We might (unlikely) have received the packet _after_ the ticket */
 477         queue_work(iwm->rx_wq, &iwm->rx_worker);
 478
 479         return 0;
 480 }
 481
 482 /* MLME handlers */
 483 static int iwm_mlme_assoc_start(struct iwm_priv *iwm, u8 *buf,
 484                                 unsigned long buf_size,
 485                                 struct iwm_wifi_cmd *cmd)
 486 {
 487         struct iwm_umac_notif_assoc_start *start;
 488
 489         start = (struct iwm_umac_notif_assoc_start *)buf;
 490
 491         set_bit(IWM_STATUS_ASSOCIATING, &iwm->status);
 492
 493         IWM_DBG_MLME(iwm, INFO, "Association with %pM Started, reason: %d\n",
 494                      start->bssid, le32_to_cpu(start->roam_reason));
 495
 496         wake_up_interruptible(&iwm->mlme_queue);
 497
 498         return 0;
 499 }
 500
 501 static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
 502                                    unsigned long buf_size,
 503                                    struct iwm_wifi_cmd *cmd)
 504 {
 505         struct iwm_umac_notif_assoc_complete *complete =
 506                 (struct iwm_umac_notif_assoc_complete *)buf;
 507         union iwreq_data wrqu;
 508
 509         IWM_DBG_MLME(iwm, INFO, "Association with %pM completed, status: %d\n",
 510                      complete->bssid, complete->status);
 511
 512         memset(&wrqu, 0, sizeof(wrqu));
 513
 514         clear_bit(IWM_STATUS_ASSOCIATING, &iwm->status);
 515
 516         switch (le32_to_cpu(complete->status)) {
 517         case UMAC_ASSOC_COMPLETE_SUCCESS:
 518                 set_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 519                 memcpy(iwm->bssid, complete->bssid, ETH_ALEN);
 520                 iwm->channel = complete->channel;
 521
 522                 iwm_link_on(iwm);
 523
 524                 memcpy(wrqu.ap_addr.sa_data, complete->bssid, ETH_ALEN);
 525                 break;
 526         case UMAC_ASSOC_COMPLETE_FAILURE:
 527                 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 528                 memset(iwm->bssid, 0, ETH_ALEN);
 529                 iwm->channel = 0;
 530
 531                 iwm_link_off(iwm);
 532         default:
 533                 break;
 534         }
 535
 536         if (iwm->conf.mode == UMAC_MODE_IBSS) {
 537                 cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL);
 538                 return 0;
 539         }
 540
 541         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 542         wireless_send_event(iwm_to_ndev(iwm), SIOCGIWAP, &wrqu, NULL);
 543
 544         return 0;
 545 }
 546
 547 static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
 548                                        unsigned long buf_size,
 549                                        struct iwm_wifi_cmd *cmd)
 550 {
 551         struct iwm_umac_notif_profile_invalidate *invalid;
 552
 553         invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
 554
 555         IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n",
 556                      le32_to_cpu(invalid->reason));
 557
 558         clear_bit(IWM_STATUS_ASSOCIATING, &iwm->status);
 559         clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 560
 561         iwm->umac_profile_active = 0;
 562         memset(iwm->bssid, 0, ETH_ALEN);
 563         iwm->channel = 0;
 564
 565         iwm_link_off(iwm);
 566
 567         wake_up_interruptible(&iwm->mlme_queue);
 568
 569         return 0;
 570 }
 571
 572 static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf,
 573                                   unsigned long buf_size,
 574                                   struct iwm_wifi_cmd *cmd)
 575 {
 576         int ret;
 577         struct iwm_umac_notif_scan_complete *scan_complete =
 578                 (struct iwm_umac_notif_scan_complete *)buf;
 579         u32 result = le32_to_cpu(scan_complete->result);
 580
 581         IWM_DBG_MLME(iwm, INFO, "type:0x%x result:0x%x seq:%d\n",
 582                      le32_to_cpu(scan_complete->type),
 583                      le32_to_cpu(scan_complete->result),
 584                      scan_complete->seq_num);
 585
 586         if (!test_and_clear_bit(IWM_STATUS_SCANNING, &iwm->status)) {
 587                 IWM_ERR(iwm, "Scan complete while device not scanning\n");
 588                 return -EIO;
 589         }
 590         if (!iwm->scan_request)
 591                 return 0;
 592
 593         ret = iwm_cfg80211_inform_bss(iwm);
 594
 595         cfg80211_scan_done(iwm->scan_request,
 596                            (result & UMAC_SCAN_RESULT_ABORTED) ? 1 : !!ret);
 597         iwm->scan_request = NULL;
 598
 599         return ret;
 600 }
 601
 602 static int iwm_mlme_update_sta_table(struct iwm_priv *iwm, u8 *buf,
 603                                      unsigned long buf_size,
 604                                      struct iwm_wifi_cmd *cmd)
 605 {
 606         struct iwm_umac_notif_sta_info *umac_sta =
 607                         (struct iwm_umac_notif_sta_info *)buf;
 608         struct iwm_sta_info *sta;
 609         int i;
 610
 611         switch (le32_to_cpu(umac_sta->opcode)) {
 612         case UMAC_OPCODE_ADD_MODIFY:
 613                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 614
 615                 IWM_DBG_MLME(iwm, INFO, "%s STA: ID = %d, Color = %d, "
 616                              "addr = %pM, qos = %d\n",
 617                              sta->valid ? "Modify" : "Add",
 618                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 619                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 620                              umac_sta->mac_addr,
 621                              umac_sta->flags & UMAC_STA_FLAG_QOS);
 622
 623                 sta->valid = 1;
 624                 sta->qos = umac_sta->flags & UMAC_STA_FLAG_QOS;
 625                 sta->color = GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR);
 626                 memcpy(sta->addr, umac_sta->mac_addr, ETH_ALEN);
 627                 break;
 628         case UMAC_OPCODE_REMOVE:
 629                 IWM_DBG_MLME(iwm, INFO, "Remove STA: ID = %d, Color = %d, "
 630                              "addr = %pM\n",
 631                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 632                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 633                              umac_sta->mac_addr);
 634
 635                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 636
 637                 if (!memcmp(sta->addr, umac_sta->mac_addr, ETH_ALEN))
 638                         sta->valid = 0;
 639
 640                 break;
 641         case UMAC_OPCODE_CLEAR_ALL:
 642                 for (i = 0; i < IWM_STA_TABLE_NUM; i++)
 643                         iwm->sta_table[i].valid = 0;
 644
 645                 break;
 646         default:
 647                 break;
 648         }
 649
 650         return 0;
 651 }
 652
 653 static int iwm_mlme_update_bss_table(struct iwm_priv *iwm, u8 *buf,
 654                                      unsigned long buf_size,
 655                                      struct iwm_wifi_cmd *cmd)
 656 {
 657         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 658         struct ieee80211_mgmt *mgmt;
 659         struct iwm_umac_notif_bss_info *umac_bss =
 660                         (struct iwm_umac_notif_bss_info *)buf;
 661         struct ieee80211_channel *channel;
 662         struct ieee80211_supported_band *band;
 663         struct iwm_bss_info *bss, *next;
 664         s32 signal;
 665         int freq;
 666         u16 frame_len = le16_to_cpu(umac_bss->frame_len);
 667         size_t bss_len = sizeof(struct iwm_umac_notif_bss_info) + frame_len;
 668
 669         mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf);
 670
 671         IWM_DBG_MLME(iwm, DBG, "New BSS info entry: %pM\n", mgmt->bssid);
 672         IWM_DBG_MLME(iwm, DBG, "\tType: 0x%x\n", le32_to_cpu(umac_bss->type));
 673         IWM_DBG_MLME(iwm, DBG, "\tTimestamp: %d\n",
 674                      le32_to_cpu(umac_bss->timestamp));
 675         IWM_DBG_MLME(iwm, DBG, "\tTable Index: %d\n",
 676                      le16_to_cpu(umac_bss->table_idx));
 677         IWM_DBG_MLME(iwm, DBG, "\tBand: %d\n", umac_bss->band);
 678         IWM_DBG_MLME(iwm, DBG, "\tChannel: %d\n", umac_bss->channel);
 679         IWM_DBG_MLME(iwm, DBG, "\tRSSI: %d\n", umac_bss->rssi);
 680         IWM_DBG_MLME(iwm, DBG, "\tFrame Length: %d\n", frame_len);
 681
 682         list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
 683                 if (bss->bss->table_idx == umac_bss->table_idx)
 684                         break;
 685
 686         if (&bss->node != &iwm->bss_list) {
 687                 /* Remove the old BSS entry, we will add it back later. */
 688                 list_del(&bss->node);
 689                 kfree(bss->bss);
 690         } else {
 691                 /* New BSS entry */
 692
 693                 bss = kzalloc(sizeof(struct iwm_bss_info), GFP_KERNEL);
 694                 if (!bss) {
 695                         IWM_ERR(iwm, "Couldn't allocate bss_info\n");
 696                         return -ENOMEM;
 697                 }
 698         }
 699
 700         bss->bss = kzalloc(bss_len, GFP_KERNEL);
 701         if (!bss) {
 702                 kfree(bss);
 703                 IWM_ERR(iwm, "Couldn't allocate bss\n");
 704                 return -ENOMEM;
 705         }
 706
 707         INIT_LIST_HEAD(&bss->node);
 708         memcpy(bss->bss, umac_bss, bss_len);
 709
 710         if (umac_bss->band == UMAC_BAND_2GHZ)
 711                 band = wiphy->bands[IEEE80211_BAND_2GHZ];
 712         else if (umac_bss->band == UMAC_BAND_5GHZ)
 713                 band = wiphy->bands[IEEE80211_BAND_5GHZ];
 714         else {
 715                 IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band);
 716                 goto err;
 717         }
 718
 719         freq = ieee80211_channel_to_frequency(umac_bss->channel);
 720         channel = ieee80211_get_channel(wiphy, freq);
 721         signal = umac_bss->rssi * 100;
 722
 723         bss->cfg_bss = cfg80211_inform_bss_frame(wiphy, channel,
 724                                                  mgmt, frame_len,
 725                                                  signal, GFP_KERNEL);
 726         if (!bss->cfg_bss)
 727                 goto err;
 728
 729         list_add_tail(&bss->node, &iwm->bss_list);
 730
 731         return 0;
 732  err:
 733         kfree(bss->bss);
 734         kfree(bss);
 735
 736         return -EINVAL;
 737 }
 738
 739 static int iwm_mlme_remove_bss(struct iwm_priv *iwm, u8 *buf,
 740                                unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 741 {
 742         struct iwm_umac_notif_bss_removed *bss_rm =
 743                 (struct iwm_umac_notif_bss_removed *)buf;
 744         struct iwm_bss_info *bss, *next;
 745         u16 table_idx;
 746         int i;
 747
 748         for (i = 0; i < le32_to_cpu(bss_rm->count); i++) {
 749                 table_idx = (le16_to_cpu(bss_rm->entries[i])
 750                              & IWM_BSS_REMOVE_INDEX_MSK);
 751                 list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
 752                         if (bss->bss->table_idx == cpu_to_le16(table_idx)) {
 753                                 struct ieee80211_mgmt *mgmt;
 754
 755                                 mgmt = (struct ieee80211_mgmt *)
 756                                         (bss->bss->frame_buf);
 757                                 IWM_DBG_MLME(iwm, ERR,
 758                                              "BSS removed: %pM\n",
 759                                              mgmt->bssid);
 760                                 list_del(&bss->node);
 761                                 kfree(bss->bss);
 762                                 kfree(bss);
 763                         }
 764         }
 765
 766         return 0;
 767 }
 768
 769 static int iwm_mlme_mgt_frame(struct iwm_priv *iwm, u8 *buf,
 770                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 771 {
 772         struct iwm_umac_notif_mgt_frame *mgt_frame =
 773         (struct iwm_umac_notif_mgt_frame *)buf;
 774         struct ieee80211_mgmt *mgt = (struct ieee80211_mgmt *)mgt_frame->frame;
 775         u8 *ie;
 776         unsigned int event;
 777         union iwreq_data wrqu;
 778
 779         IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame,
 780                     le16_to_cpu(mgt_frame->len));
 781
 782         if (ieee80211_is_assoc_req(mgt->frame_control)) {
 783                 ie = mgt->u.assoc_req.variable;;
 784                 event = IWEVASSOCREQIE;
 785         } else if (ieee80211_is_reassoc_req(mgt->frame_control)) {
 786                 ie = mgt->u.reassoc_req.variable;;
 787                 event = IWEVASSOCREQIE;
 788         } else if (ieee80211_is_assoc_resp(mgt->frame_control)) {
 789                 ie = mgt->u.assoc_resp.variable;;
 790                 event = IWEVASSOCRESPIE;
 791         } else if (ieee80211_is_reassoc_resp(mgt->frame_control)) {
 792                 ie = mgt->u.reassoc_resp.variable;;
 793                 event = IWEVASSOCRESPIE;
 794         } else {
 795                 IWM_ERR(iwm, "Unsupported management frame");
 796                 return 0;
 797         }
 798
 799         wrqu.data.length = le16_to_cpu(mgt_frame->len) - (ie - (u8 *)mgt);
 800
 801         IWM_HEXDUMP(iwm, DBG, MLME, "EVT: ", ie, wrqu.data.length);
 802         wireless_send_event(iwm_to_ndev(iwm), event, &wrqu, ie);
 803
 804         return 0;
 805 }
 806
 807 static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf,
 808                         unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 809 {
 810         struct iwm_umac_notif_wifi_if *notif =
 811                 (struct iwm_umac_notif_wifi_if *)buf;
 812
 813         switch (notif->status) {
 814         case WIFI_IF_NTFY_ASSOC_START:
 815                 return iwm_mlme_assoc_start(iwm, buf, buf_size, cmd);
 816         case WIFI_IF_NTFY_ASSOC_COMPLETE:
 817                 return iwm_mlme_assoc_complete(iwm, buf, buf_size, cmd);
 818         case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE:
 819                 return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd);
 820         case WIFI_IF_NTFY_CONNECTION_TERMINATED:
 821                 IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
 822                 break;
 823         case WIFI_IF_NTFY_SCAN_COMPLETE:
 824                 return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd);
 825         case WIFI_IF_NTFY_STA_TABLE_CHANGE:
 826                 return iwm_mlme_update_sta_table(iwm, buf, buf_size, cmd);
 827         case WIFI_IF_NTFY_EXTENDED_IE_REQUIRED:
 828                 IWM_DBG_MLME(iwm, DBG, "Extended IE required\n");
 829                 break;
 830         case WIFI_IF_NTFY_BSS_TRK_TABLE_CHANGED:
 831                 return iwm_mlme_update_bss_table(iwm, buf, buf_size, cmd);
 832         case WIFI_IF_NTFY_BSS_TRK_ENTRIES_REMOVED:
 833                 return iwm_mlme_remove_bss(iwm, buf, buf_size, cmd);
 834                 break;
 835         case WIFI_IF_NTFY_MGMT_FRAME:
 836                 return iwm_mlme_mgt_frame(iwm, buf, buf_size, cmd);
 837         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_START:
 838         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_COMPLETE:
 839         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_START:
 840         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_RESULT:
 841         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_START:
 842         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_COMPLETE:
 843         case WIFI_DBG_IF_NTFY_CNCT_ATC_START:
 844         case WIFI_DBG_IF_NTFY_COEX_NOTIFICATION:
 845         case WIFI_DBG_IF_NTFY_COEX_HANDLE_ENVELOP:
 846         case WIFI_DBG_IF_NTFY_COEX_HANDLE_RELEASE_ENVELOP:
 847                 IWM_DBG_MLME(iwm, DBG, "MLME debug notification: 0x%x\n",
 848                              notif->status);
 849                 break;
 850         default:
 851                 IWM_ERR(iwm, "Unhandled notification: 0x%x\n", notif->status);
 852                 break;
 853         }
 854
 855         return 0;
 856 }
 857
 858 #define IWM_STATS_UPDATE_INTERVAL               (2 * HZ)
 859
 860 static int iwm_ntf_statistics(struct iwm_priv *iwm, u8 *buf,
 861                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 862 {
 863         struct iwm_umac_notif_stats *stats = (struct iwm_umac_notif_stats *)buf;
 864         struct iw_statistics *wstats = &iwm->wstats;
 865         u16 max_rate = 0;
 866         int i;
 867
 868         IWM_DBG_MLME(iwm, DBG, "Statistics notification received\n");
 869
 870         if (test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) {
 871                 for (i = 0; i < UMAC_NTF_RATE_SAMPLE_NR; i++) {
 872                         max_rate = max_t(u16, max_rate,
 873                                          max(le16_to_cpu(stats->tx_rate[i]),
 874                                              le16_to_cpu(stats->rx_rate[i])));
 875                 }
 876                 /* UMAC passes rate info multiplies by 2 */
 877                 iwm->rate = max_rate >> 1;
 878         }
 879         iwm->txpower = le32_to_cpu(stats->tx_power);
 880
 881         wstats->status = 0;
 882
 883         wstats->discard.nwid = le32_to_cpu(stats->rx_drop_other_bssid);
 884         wstats->discard.code = le32_to_cpu(stats->rx_drop_decode);
 885         wstats->discard.fragment = le32_to_cpu(stats->rx_drop_reassembly);
 886         wstats->discard.retries = le32_to_cpu(stats->tx_drop_max_retry);
 887
 888         wstats->miss.beacon = le32_to_cpu(stats->missed_beacons);
 889
 890         /* according to cfg80211 */
 891         if (stats->rssi_dbm < -110)
 892                 wstats->qual.qual = 0;
 893         else if (stats->rssi_dbm > -40)
 894                 wstats->qual.qual = 70;
 895         else
 896                 wstats->qual.qual = stats->rssi_dbm + 110;
 897
 898         wstats->qual.level = stats->rssi_dbm;
 899         wstats->qual.noise = stats->noise_dbm;
 900         wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
 901
 902         schedule_delayed_work(&iwm->stats_request, IWM_STATS_UPDATE_INTERVAL);
 903
 904         mod_timer(&iwm->watchdog, round_jiffies(jiffies + IWM_WATCHDOG_PERIOD));
 905
 906         return 0;
 907 }
 908
 909 static int iwm_ntf_eeprom_proxy(struct iwm_priv *iwm, u8 *buf,
 910                                 unsigned long buf_size,
 911                                 struct iwm_wifi_cmd *cmd)
 912 {
 913         struct iwm_umac_cmd_eeprom_proxy *eeprom_proxy =
 914                 (struct iwm_umac_cmd_eeprom_proxy *)
 915                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 916         struct iwm_umac_cmd_eeprom_proxy_hdr *hdr = &eeprom_proxy->hdr;
 917         u32 hdr_offset = le32_to_cpu(hdr->offset);
 918         u32 hdr_len = le32_to_cpu(hdr->len);
 919         u32 hdr_type = le32_to_cpu(hdr->type);
 920
 921         IWM_DBG_NTF(iwm, DBG, "type: 0x%x, len: %d, offset: 0x%x\n",
 922                     hdr_type, hdr_len, hdr_offset);
 923
 924         if ((hdr_offset + hdr_len) > IWM_EEPROM_LEN)
 925                 return -EINVAL;
 926
 927         switch (hdr_type) {
 928         case IWM_UMAC_CMD_EEPROM_TYPE_READ:
 929                 memcpy(iwm->eeprom + hdr_offset, eeprom_proxy->buf, hdr_len);
 930                 break;
 931         case IWM_UMAC_CMD_EEPROM_TYPE_WRITE:
 932         default:
 933                 return -ENOTSUPP;
 934         }
 935
 936         return 0;
 937 }
 938
 939 static int iwm_ntf_channel_info_list(struct iwm_priv *iwm, u8 *buf,
 940                                      unsigned long buf_size,
 941                                      struct iwm_wifi_cmd *cmd)
 942 {
 943         struct iwm_umac_cmd_get_channel_list *ch_list =
 944                         (struct iwm_umac_cmd_get_channel_list *)
 945                         (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 946         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 947         struct ieee80211_supported_band *band;
 948         int i;
 949
 950         band = wiphy->bands[IEEE80211_BAND_2GHZ];
 951
 952         for (i = 0; i < band->n_channels; i++) {
 953                 unsigned long ch_mask_0 =
 954                         le32_to_cpu(ch_list->ch[0].channels_mask);
 955                 unsigned long ch_mask_2 =
 956                         le32_to_cpu(ch_list->ch[2].channels_mask);
 957
 958                 if (!test_bit(i, &ch_mask_0))
 959                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
 960
 961                 if (!test_bit(i, &ch_mask_2))
 962                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
 963         }
 964
 965         band = wiphy->bands[IEEE80211_BAND_5GHZ];
 966
 967         for (i = 0; i < min(band->n_channels, 32); i++) {
 968                 unsigned long ch_mask_1 =
 969                         le32_to_cpu(ch_list->ch[1].channels_mask);
 970                 unsigned long ch_mask_3 =
 971                         le32_to_cpu(ch_list->ch[3].channels_mask);
 972
 973                 if (!test_bit(i, &ch_mask_1))
 974                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
 975
 976                 if (!test_bit(i, &ch_mask_3))
 977                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
 978         }
 979
 980         return 0;
 981 }
 982
 983 static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf,
 984                                    unsigned long buf_size,
 985                                    struct iwm_wifi_cmd *cmd)
 986 {
 987         struct iwm_umac_wifi_if *hdr =
 988                         (struct iwm_umac_wifi_if *)cmd->buf.payload;
 989
 990         IWM_DBG_NTF(iwm, DBG, "WIFI_IF_WRAPPER cmd is delivered to UMAC: "
 991                     "oid is 0x%x\n", hdr->oid);
 992
 993         if (hdr->oid <= WIFI_IF_NTFY_MAX) {
 994                 set_bit(hdr->oid, &iwm->wifi_ntfy[0]);
 995                 wake_up_interruptible(&iwm->wifi_ntfy_queue);
 996         } else
 997                 return -EINVAL;
 998
 999         switch (hdr->oid) {
1000         case UMAC_WIFI_IF_CMD_SET_PROFILE:
1001                 iwm->umac_profile_active = 1;
1002                 break;
1003         default:
1004                 break;
1005         }
1006
1007         return 0;
1008 }
1009
1010 static int iwm_ntf_card_state(struct iwm_priv *iwm, u8 *buf,
1011                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
1012 {
1013         struct wiphy *wiphy = iwm_to_wiphy(iwm);
1014         struct iwm_lmac_card_state *state = (struct iwm_lmac_card_state *)
1015                                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1016         u32 flags = le32_to_cpu(state->flags);
1017
1018         IWM_INFO(iwm, "HW RF Kill %s, CT Kill %s\n",
1019                  flags & IWM_CARD_STATE_HW_DISABLED ? "ON" : "OFF",
1020                  flags & IWM_CARD_STATE_CTKILL_DISABLED ? "ON" : "OFF");
1021
1022         wiphy_rfkill_set_hw_state(wiphy, flags & IWM_CARD_STATE_HW_DISABLED);
1023
1024         return 0;
1025 }
1026
1027 static int iwm_rx_handle_wifi(struct iwm_priv *iwm, u8 *buf,
1028                               unsigned long buf_size)
1029 {
1030         struct iwm_umac_wifi_in_hdr *wifi_hdr;
1031         struct iwm_wifi_cmd *cmd;
1032         u8 source, cmd_id;
1033         u16 seq_num;
1034         u32 count;
1035         u8 resp;
1036
1037         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1038         cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1039
1040         source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1041         if (source >= IWM_SRC_NUM) {
1042                 IWM_CRIT(iwm, "invalid source %d\n", source);
1043                 return -EINVAL;
1044         }
1045
1046         count = (GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_BYTE_COUNT));
1047         count += sizeof(struct iwm_umac_wifi_in_hdr) -
1048                  sizeof(struct iwm_dev_cmd_hdr);
1049         if (count > buf_size) {
1050                 IWM_CRIT(iwm, "count %d, buf size:%ld\n", count, buf_size);
1051                 return -EINVAL;
1052         }
1053
1054         resp = GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_STATUS);
1055
1056         seq_num = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
1057
1058         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x, seqnum: %d\n",
1059                    cmd_id, source, seq_num);
1060
1061         /*
1062          * If this is a response to a previously sent command, there must
1063          * be a pending command for this sequence number.
1064          */
1065         cmd = iwm_get_pending_wifi_cmd(iwm, seq_num);
1066
1067         /* Notify the caller only for sync commands. */
1068         switch (source) {
1069         case UMAC_HDI_IN_SOURCE_FHRX:
1070                 if (iwm->lmac_handlers[cmd_id] &&
1071                     test_bit(cmd_id, &iwm->lmac_handler_map[0]))
1072                         return iwm_notif_send(iwm, cmd, cmd_id, source,
1073                                               buf, count);
1074                 break;
1075         case UMAC_HDI_IN_SOURCE_FW:
1076                 if (iwm->umac_handlers[cmd_id] &&
1077                     test_bit(cmd_id, &iwm->umac_handler_map[0]))
1078                         return iwm_notif_send(iwm, cmd, cmd_id, source,
1079                                               buf, count);
1080                 break;
1081         case UMAC_HDI_IN_SOURCE_UDMA:
1082                 break;
1083         }
1084
1085         return iwm_rx_handle_resp(iwm, buf, count, cmd);
1086 }
1087
1088 int iwm_rx_handle_resp(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size,
1089                        struct iwm_wifi_cmd *cmd)
1090 {
1091         u8 source, cmd_id;
1092         struct iwm_umac_wifi_in_hdr *wifi_hdr;
1093         int ret = 0;
1094
1095         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1096         cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1097
1098         source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1099
1100         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x\n", cmd_id, source);
1101
1102         switch (source) {
1103         case UMAC_HDI_IN_SOURCE_FHRX:
1104                 if (iwm->lmac_handlers[cmd_id])
1105                         ret = iwm->lmac_handlers[cmd_id]
1106                                         (iwm, buf, buf_size, cmd);
1107                 break;
1108         case UMAC_HDI_IN_SOURCE_FW:
1109                 if (iwm->umac_handlers[cmd_id])
1110                         ret = iwm->umac_handlers[cmd_id]
1111                                         (iwm, buf, buf_size, cmd);
1112                 break;
1113         case UMAC_HDI_IN_SOURCE_UDMA:
1114                 ret = -EINVAL;
1115                 break;
1116         }
1117
1118         kfree(cmd);
1119
1120         return ret;
1121 }
1122
1123 static int iwm_rx_handle_nonwifi(struct iwm_priv *iwm, u8 *buf,
1124                                  unsigned long buf_size)
1125 {
1126         u8 seq_num;
1127         struct iwm_udma_in_hdr *hdr = (struct iwm_udma_in_hdr *)buf;
1128         struct iwm_nonwifi_cmd *cmd, *next;
1129
1130         seq_num = GET_VAL32(hdr->cmd, UDMA_HDI_IN_CMD_NON_WIFI_HW_SEQ_NUM);
1131
1132         /*
1133          * We received a non wifi answer.
1134          * Let's check if there's a pending command for it, and if so
1135          * replace the command payload with the buffer, and then wake the
1136          * callers up.
1137          * That means we only support synchronised non wifi command response
1138          * schemes.
1139          */
1140         list_for_each_entry_safe(cmd, next, &iwm->nonwifi_pending_cmd, pending)
1141                 if (cmd->seq_num == seq_num) {
1142                         cmd->resp_received = 1;
1143                         cmd->buf.len = buf_size;
1144                         memcpy(cmd->buf.hdr, buf, buf_size);
1145                         wake_up_interruptible(&iwm->nonwifi_queue);
1146                 }
1147
1148         return 0;
1149 }
1150
1151 static int iwm_rx_handle_umac(struct iwm_priv *iwm, u8 *buf,
1152                               unsigned long buf_size)
1153 {
1154         int ret = 0;
1155         u8 op_code;
1156         unsigned long buf_offset = 0;
1157         struct iwm_udma_in_hdr *hdr;
1158
1159         /*
1160          * To allow for a more efficient bus usage, UMAC
1161          * messages are encapsulated into UDMA ones. This
1162          * way we can have several UMAC messages in one bus
1163          * transfer.
1164          * A UDMA frame size is always aligned on 16 bytes,
1165          * and a UDMA frame must not start with a UMAC_PAD_TERMINAL
1166          * word. This is how we parse a bus frame into several
1167          * UDMA ones.
1168          */
1169         while (buf_offset < buf_size) {
1170
1171                 hdr = (struct iwm_udma_in_hdr *)(buf + buf_offset);
1172
1173                 if (iwm_rx_check_udma_hdr(hdr) < 0) {
1174                         IWM_DBG_RX(iwm, DBG, "End of frame\n");
1175                         break;
1176                 }
1177
1178                 op_code = GET_VAL32(hdr->cmd, UMAC_HDI_IN_CMD_OPCODE);
1179
1180                 IWM_DBG_RX(iwm, DBG, "Op code: 0x%x\n", op_code);
1181
1182                 if (op_code == UMAC_HDI_IN_OPCODE_WIFI) {
1183                         ret |= iwm_rx_handle_wifi(iwm, buf + buf_offset,
1184                                                   buf_size - buf_offset);
1185                 } else if (op_code < UMAC_HDI_IN_OPCODE_NONWIFI_MAX) {
1186                         if (GET_VAL32(hdr->cmd,
1187                                       UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) !=
1188                             UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) {
1189                                 IWM_ERR(iwm, "Incorrect hw signature\n");
1190                                 return -EINVAL;
1191                         }
1192                         ret |= iwm_rx_handle_nonwifi(iwm, buf + buf_offset,
1193                                                      buf_size - buf_offset);
1194                 } else {
1195                         IWM_ERR(iwm, "Invalid RX opcode: 0x%x\n", op_code);
1196                         ret |= -EINVAL;
1197                 }
1198
1199                 buf_offset += iwm_rx_resp_size(hdr);
1200         }
1201
1202         return ret;
1203 }
1204
1205 int iwm_rx_handle(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size)
1206 {
1207         struct iwm_udma_in_hdr *hdr;
1208
1209         hdr = (struct iwm_udma_in_hdr *)buf;
1210
1211         switch (le32_to_cpu(hdr->cmd)) {
1212         case UMAC_REBOOT_BARKER:
1213                 return iwm_notif_send(iwm, NULL, IWM_BARKER_REBOOT_NOTIFICATION,
1214                                       IWM_SRC_UDMA, buf, buf_size);
1215         case UMAC_ACK_BARKER:
1216                 return iwm_notif_send(iwm, NULL, IWM_ACK_BARKER_NOTIFICATION,
1217                                       IWM_SRC_UDMA, NULL, 0);
1218         default:
1219                 IWM_DBG_RX(iwm, DBG, "Received cmd: 0x%x\n", hdr->cmd);
1220                 return iwm_rx_handle_umac(iwm, buf, buf_size);
1221         }
1222
1223         return 0;
1224 }
1225
1226 static const iwm_handler iwm_umac_handlers[] =
1227 {
1228         [UMAC_NOTIFY_OPCODE_ERROR]              = iwm_ntf_error,
1229         [UMAC_NOTIFY_OPCODE_ALIVE]              = iwm_ntf_umac_alive,
1230         [UMAC_NOTIFY_OPCODE_INIT_COMPLETE]      = iwm_ntf_init_complete,
1231         [UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS]   = iwm_ntf_wifi_status,
1232         [UMAC_NOTIFY_OPCODE_WIFI_IF_WRAPPER]    = iwm_ntf_mlme,
1233         [UMAC_NOTIFY_OPCODE_PAGE_DEALLOC]       = iwm_ntf_tx_credit_update,
1234         [UMAC_NOTIFY_OPCODE_RX_TICKET]          = iwm_ntf_rx_ticket,
1235         [UMAC_CMD_OPCODE_RESET]                 = iwm_ntf_umac_reset,
1236         [UMAC_NOTIFY_OPCODE_STATS]              = iwm_ntf_statistics,
1237         [UMAC_CMD_OPCODE_EEPROM_PROXY]          = iwm_ntf_eeprom_proxy,
1238         [UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST]    = iwm_ntf_channel_info_list,
1239         [REPLY_RX_MPDU_CMD]                     = iwm_ntf_rx_packet,
1240         [UMAC_CMD_OPCODE_WIFI_IF_WRAPPER]       = iwm_ntf_wifi_if_wrapper,
1241 };
1242
1243 static const iwm_handler iwm_lmac_handlers[] =
1244 {
1245         [REPLY_TX]                              = iwm_ntf_tx,
1246         [REPLY_ALIVE]                           = iwm_ntf_lmac_version,
1247         [CALIBRATION_RES_NOTIFICATION]          = iwm_ntf_calib_res,
1248         [CALIBRATION_COMPLETE_NOTIFICATION]     = iwm_ntf_calib_complete,
1249         [CALIBRATION_CFG_CMD]                   = iwm_ntf_calib_cfg,
1250         [REPLY_RX_MPDU_CMD]                     = iwm_ntf_rx_packet,
1251         [CARD_STATE_NOTIFICATION]               = iwm_ntf_card_state,
1252 };
1253
1254 void iwm_rx_setup_handlers(struct iwm_priv *iwm)
1255 {
1256         iwm->umac_handlers = (iwm_handler *) iwm_umac_handlers;
1257         iwm->lmac_handlers = (iwm_handler *) iwm_lmac_handlers;
1258 }
1259
1260 static void iwm_remove_iv(struct sk_buff *skb, u32 hdr_total_len)
1261 {
1262         struct ieee80211_hdr *hdr;
1263         unsigned int hdr_len;
1264
1265         hdr = (struct ieee80211_hdr *)skb->data;
1266
1267         if (!ieee80211_has_protected(hdr->frame_control))
1268                 return;
1269
1270         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1271         if (hdr_total_len <= hdr_len)
1272                 return;
1273
1274         memmove(skb->data + (hdr_total_len - hdr_len), skb->data, hdr_len);
1275         skb_pull(skb, (hdr_total_len - hdr_len));
1276 }
1277
1278 static void iwm_rx_adjust_packet(struct iwm_priv *iwm,
1279                                  struct iwm_rx_packet *packet,
1280                                  struct iwm_rx_ticket_node *ticket_node)
1281 {
1282         u32 payload_offset = 0, payload_len;
1283         struct iwm_rx_ticket *ticket = ticket_node->ticket;
1284         struct iwm_rx_mpdu_hdr *mpdu_hdr;
1285         struct ieee80211_hdr *hdr;
1286
1287         mpdu_hdr = (struct iwm_rx_mpdu_hdr *)packet->skb->data;
1288         payload_offset += sizeof(struct iwm_rx_mpdu_hdr);
1289         /* Padding is 0 or 2 bytes */
1290         payload_len = le16_to_cpu(mpdu_hdr->len) +
1291                 (le16_to_cpu(ticket->flags) & IWM_RX_TICKET_PAD_SIZE_MSK);
1292         payload_len -= ticket->tail_len;
1293
1294         IWM_DBG_RX(iwm, DBG, "Packet adjusted, len:%d, offset:%d, "
1295                    "ticket offset:%d ticket tail len:%d\n",
1296                    payload_len, payload_offset, ticket->payload_offset,
1297                    ticket->tail_len);
1298
1299         IWM_HEXDUMP(iwm, DBG, RX, "RAW: ", packet->skb->data, packet->skb->len);
1300
1301         skb_pull(packet->skb, payload_offset);
1302         skb_trim(packet->skb, payload_len);
1303
1304         iwm_remove_iv(packet->skb, ticket->payload_offset);
1305
1306         hdr = (struct ieee80211_hdr *) packet->skb->data;
1307         if (ieee80211_is_data_qos(hdr->frame_control)) {
1308                 /* UMAC handed QOS_DATA frame with 2 padding bytes appended
1309                  * to the qos_ctl field in IEEE 802.11 headers. */
1310                 memmove(packet->skb->data + IEEE80211_QOS_CTL_LEN + 2,
1311                         packet->skb->data,
1312                         ieee80211_hdrlen(hdr->frame_control) -
1313                         IEEE80211_QOS_CTL_LEN);
1314                 hdr = (struct ieee80211_hdr *) skb_pull(packet->skb,
1315                                 IEEE80211_QOS_CTL_LEN + 2);
1316                 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1317         }
1318
1319         IWM_HEXDUMP(iwm, DBG, RX, "ADJUSTED: ",
1320                     packet->skb->data, packet->skb->len);
1321 }
1322
1323 static void classify8023(struct sk_buff *skb)
1324 {
1325         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1326
1327         if (ieee80211_is_data_qos(hdr->frame_control)) {
1328                 u8 *qc = ieee80211_get_qos_ctl(hdr);
1329                 /* frame has qos control */
1330                 skb->priority = *qc & IEEE80211_QOS_CTL_TID_MASK;
1331         } else {
1332                 skb->priority = 0;
1333         }
1334 }
1335
1336 static void iwm_rx_process_packet(struct iwm_priv *iwm,
1337                                   struct iwm_rx_packet *packet,
1338                                   struct iwm_rx_ticket_node *ticket_node)
1339 {
1340         int ret;
1341         struct sk_buff *skb = packet->skb;
1342         struct wireless_dev *wdev = iwm_to_wdev(iwm);
1343         struct net_device *ndev = iwm_to_ndev(iwm);
1344
1345         IWM_DBG_RX(iwm, DBG, "Processing packet ID %d\n", packet->id);
1346
1347         switch (le16_to_cpu(ticket_node->ticket->action)) {
1348         case IWM_RX_TICKET_RELEASE:
1349                 IWM_DBG_RX(iwm, DBG, "RELEASE packet\n");
1350                 classify8023(skb);
1351                 iwm_rx_adjust_packet(iwm, packet, ticket_node);
1352                 ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype);
1353                 if (ret < 0) {
1354                         IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - "
1355                                    "%d\n", ret);
1356                         break;
1357                 }
1358
1359                 IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
1360
1361                 skb->dev = iwm_to_ndev(iwm);
1362                 skb->protocol = eth_type_trans(skb, ndev);
1363                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1364                 memset(skb->cb, 0, sizeof(skb->cb));
1365
1366                 ndev->stats.rx_packets++;
1367                 ndev->stats.rx_bytes += skb->len;
1368
1369                 if (netif_rx_ni(skb) == NET_RX_DROP) {
1370                         IWM_ERR(iwm, "Packet dropped\n");
1371                         ndev->stats.rx_dropped++;
1372                 }
1373                 break;
1374         case IWM_RX_TICKET_DROP:
1375                 IWM_DBG_RX(iwm, DBG, "DROP packet\n");
1376                 kfree_skb(packet->skb);
1377                 break;
1378         default:
1379                 IWM_ERR(iwm, "Unknow ticket action: %d\n",
1380                         le16_to_cpu(ticket_node->ticket->action));
1381                 kfree_skb(packet->skb);
1382         }
1383
1384         kfree(packet);
1385         iwm_rx_ticket_node_free(ticket_node);
1386 }
1387
1388 /*
1389  * Rx data processing:
1390  *
1391  * We're receiving Rx packet from the LMAC, and Rx ticket from
1392  * the UMAC.
1393  * To forward a target data packet upstream (i.e. to the
1394  * kernel network stack), we must have received an Rx ticket
1395  * that tells us we're allowed to release this packet (ticket
1396  * action is IWM_RX_TICKET_RELEASE). The Rx ticket also indicates,
1397  * among other things, where valid data actually starts in the Rx
1398  * packet.
1399  */
1400 void iwm_rx_worker(struct work_struct *work)
1401 {
1402         struct iwm_priv *iwm;
1403         struct iwm_rx_ticket_node *ticket, *next;
1404
1405         iwm = container_of(work, struct iwm_priv, rx_worker);
1406
1407         /*
1408          * We go through the tickets list and if there is a pending
1409          * packet for it, we push it upstream.
1410          * We stop whenever a ticket is missing its packet, as we're
1411          * supposed to send the packets in order.
1412          */
1413         list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
1414                 struct iwm_rx_packet *packet =
1415                         iwm_rx_packet_get(iwm, le16_to_cpu(ticket->ticket->id));
1416
1417                 if (!packet) {
1418                         IWM_DBG_RX(iwm, DBG, "Skip rx_work: Wait for ticket %d "
1419                                    "to be handled first\n",
1420                                    le16_to_cpu(ticket->ticket->id));
1421                         return;
1422                 }
1423
1424                 list_del(&ticket->node);
1425                 list_del(&packet->node);
1426                 iwm_rx_process_packet(iwm, packet, ticket);
1427         }
1428 }
1429