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 iwm_umac_notif_init_complete *init_complete =
 147                         (struct iwm_umac_notif_init_complete *)(buf);
 148         u16 status = le16_to_cpu(init_complete->status);
 149
 150         if (status == UMAC_NTFY_INIT_COMPLETE_STATUS_ERR) {
 151                 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is on (radio off)\n");
 152                 set_bit(IWM_RADIO_RFKILL_HW, &iwm->radio);
 153         } else {
 154                 IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is off (radio on)\n");
 155                 clear_bit(IWM_RADIO_RFKILL_HW, &iwm->radio);
 156         }
 157
 158         return 0;
 159 }
 160
 161 static int iwm_ntf_tx_credit_update(struct iwm_priv *iwm, u8 *buf,
 162                                     unsigned long buf_size,
 163                                     struct iwm_wifi_cmd *cmd)
 164 {
 165         int pool_nr, total_freed_pages;
 166         unsigned long pool_map;
 167         int i, id;
 168         struct iwm_umac_notif_page_dealloc *dealloc =
 169                         (struct iwm_umac_notif_page_dealloc *)buf;
 170
 171         pool_nr = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_CNT);
 172         pool_map = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_MSK);
 173
 174         IWM_DBG_TX(iwm, DBG, "UMAC dealloc notification: pool nr %d, "
 175                    "update map 0x%lx\n", pool_nr, pool_map);
 176
 177         spin_lock(&iwm->tx_credit.lock);
 178
 179         for (i = 0; i < pool_nr; i++) {
 180                 id = GET_VAL32(dealloc->grp_info[i],
 181                                UMAC_DEALLOC_NTFY_GROUP_NUM);
 182                 if (test_bit(id, &pool_map)) {
 183                         total_freed_pages = GET_VAL32(dealloc->grp_info[i],
 184                                               UMAC_DEALLOC_NTFY_PAGE_CNT);
 185                         iwm_tx_credit_inc(iwm, id, total_freed_pages);
 186                 }
 187         }
 188
 189         spin_unlock(&iwm->tx_credit.lock);
 190
 191         return 0;
 192 }
 193
 194 static int iwm_ntf_umac_reset(struct iwm_priv *iwm, u8 *buf,
 195                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 196 {
 197         IWM_DBG_NTF(iwm, DBG, "UMAC RESET done\n");
 198
 199         return 0;
 200 }
 201
 202 static int iwm_ntf_lmac_version(struct iwm_priv *iwm, u8 *buf,
 203                                 unsigned long buf_size,
 204                                 struct iwm_wifi_cmd *cmd)
 205 {
 206         IWM_DBG_NTF(iwm, INFO, "LMAC Version: %x.%x\n", buf[9], buf[8]);
 207
 208         return 0;
 209 }
 210
 211 static int iwm_ntf_tx(struct iwm_priv *iwm, u8 *buf,
 212                       unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 213 {
 214         struct iwm_lmac_tx_resp *tx_resp;
 215         struct iwm_umac_wifi_in_hdr *hdr;
 216
 217         tx_resp = (struct iwm_lmac_tx_resp *)
 218                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 219         hdr = (struct iwm_umac_wifi_in_hdr *)buf;
 220
 221         IWM_DBG_NTF(iwm, DBG, "REPLY_TX, buf size: %lu\n", buf_size);
 222
 223         IWM_DBG_NTF(iwm, DBG, "Seqnum: %d\n",
 224                     le16_to_cpu(hdr->sw_hdr.cmd.seq_num));
 225         IWM_DBG_NTF(iwm, DBG, "\tFrame cnt: %d\n", tx_resp->frame_cnt);
 226         IWM_DBG_NTF(iwm, DBG, "\tRetry cnt: %d\n",
 227                     le16_to_cpu(tx_resp->retry_cnt));
 228         IWM_DBG_NTF(iwm, DBG, "\tSeq ctl: %d\n", le16_to_cpu(tx_resp->seq_ctl));
 229         IWM_DBG_NTF(iwm, DBG, "\tByte cnt: %d\n",
 230                     le16_to_cpu(tx_resp->byte_cnt));
 231         IWM_DBG_NTF(iwm, DBG, "\tStatus: 0x%x\n", le32_to_cpu(tx_resp->status));
 232
 233         return 0;
 234 }
 235
 236
 237 static int iwm_ntf_calib_res(struct iwm_priv *iwm, u8 *buf,
 238                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 239 {
 240         u8 opcode;
 241         u8 *calib_buf;
 242         struct iwm_lmac_calib_hdr *hdr = (struct iwm_lmac_calib_hdr *)
 243                                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 244
 245         opcode = hdr->opcode;
 246
 247         BUG_ON(opcode >= CALIBRATION_CMD_NUM ||
 248                opcode < PHY_CALIBRATE_OPCODES_NUM);
 249
 250         IWM_DBG_NTF(iwm, DBG, "Store calibration result for opcode: %d\n",
 251                     opcode);
 252
 253         buf_size -= sizeof(struct iwm_umac_wifi_in_hdr);
 254         calib_buf = iwm->calib_res[opcode].buf;
 255
 256         if (!calib_buf || (iwm->calib_res[opcode].size < buf_size)) {
 257                 kfree(calib_buf);
 258                 calib_buf = kzalloc(buf_size, GFP_KERNEL);
 259                 if (!calib_buf) {
 260                         IWM_ERR(iwm, "Memory allocation failed: calib_res\n");
 261                         return -ENOMEM;
 262                 }
 263                 iwm->calib_res[opcode].buf = calib_buf;
 264                 iwm->calib_res[opcode].size = buf_size;
 265         }
 266
 267         memcpy(calib_buf, hdr, buf_size);
 268         set_bit(opcode - PHY_CALIBRATE_OPCODES_NUM, &iwm->calib_done_map);
 269
 270         return 0;
 271 }
 272
 273 static int iwm_ntf_calib_complete(struct iwm_priv *iwm, u8 *buf,
 274                                   unsigned long buf_size,
 275                                   struct iwm_wifi_cmd *cmd)
 276 {
 277         IWM_DBG_NTF(iwm, DBG, "Calibration completed\n");
 278
 279         return 0;
 280 }
 281
 282 static int iwm_ntf_calib_cfg(struct iwm_priv *iwm, u8 *buf,
 283                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 284 {
 285         struct iwm_lmac_cal_cfg_resp *cal_resp;
 286
 287         cal_resp = (struct iwm_lmac_cal_cfg_resp *)
 288                         (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 289
 290         IWM_DBG_NTF(iwm, DBG, "Calibration CFG command status: %d\n",
 291                     le32_to_cpu(cal_resp->status));
 292
 293         return 0;
 294 }
 295
 296 static int iwm_ntf_wifi_status(struct iwm_priv *iwm, u8 *buf,
 297                                unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 298 {
 299         struct iwm_umac_notif_wifi_status *status =
 300                 (struct iwm_umac_notif_wifi_status *)buf;
 301
 302         iwm->core_enabled |= le16_to_cpu(status->status);
 303
 304         return 0;
 305 }
 306
 307 static struct iwm_rx_ticket_node *
 308 iwm_rx_ticket_node_alloc(struct iwm_priv *iwm, struct iwm_rx_ticket *ticket)
 309 {
 310         struct iwm_rx_ticket_node *ticket_node;
 311
 312         ticket_node = kzalloc(sizeof(struct iwm_rx_ticket_node), GFP_KERNEL);
 313         if (!ticket_node) {
 314                 IWM_ERR(iwm, "Couldn't allocate ticket node\n");
 315                 return ERR_PTR(-ENOMEM);
 316         }
 317
 318         ticket_node->ticket = kzalloc(sizeof(struct iwm_rx_ticket), GFP_KERNEL);
 319         if (!ticket_node->ticket) {
 320                 IWM_ERR(iwm, "Couldn't allocate RX ticket\n");
 321                 kfree(ticket_node);
 322                 return ERR_PTR(-ENOMEM);
 323         }
 324
 325         memcpy(ticket_node->ticket, ticket, sizeof(struct iwm_rx_ticket));
 326         INIT_LIST_HEAD(&ticket_node->node);
 327
 328         return ticket_node;
 329 }
 330
 331 static void iwm_rx_ticket_node_free(struct iwm_rx_ticket_node *ticket_node)
 332 {
 333         kfree(ticket_node->ticket);
 334         kfree(ticket_node);
 335 }
 336
 337 static struct iwm_rx_packet *iwm_rx_packet_get(struct iwm_priv *iwm, u16 id)
 338 {
 339         u8 id_hash = IWM_RX_ID_GET_HASH(id);
 340         struct list_head *packet_list;
 341         struct iwm_rx_packet *packet, *next;
 342
 343         packet_list = &iwm->rx_packets[id_hash];
 344
 345         list_for_each_entry_safe(packet, next, packet_list, node)
 346                 if (packet->id == id)
 347                         return packet;
 348
 349         return NULL;
 350 }
 351
 352 static struct iwm_rx_packet *iwm_rx_packet_alloc(struct iwm_priv *iwm, u8 *buf,
 353                                                  u32 size, u16 id)
 354 {
 355         struct iwm_rx_packet *packet;
 356
 357         packet = kzalloc(sizeof(struct iwm_rx_packet), GFP_KERNEL);
 358         if (!packet) {
 359                 IWM_ERR(iwm, "Couldn't allocate packet\n");
 360                 return ERR_PTR(-ENOMEM);
 361         }
 362
 363         packet->skb = dev_alloc_skb(size);
 364         if (!packet->skb) {
 365                 IWM_ERR(iwm, "Couldn't allocate packet SKB\n");
 366                 kfree(packet);
 367                 return ERR_PTR(-ENOMEM);
 368         }
 369
 370         packet->pkt_size = size;
 371
 372         skb_put(packet->skb, size);
 373         memcpy(packet->skb->data, buf, size);
 374         INIT_LIST_HEAD(&packet->node);
 375         packet->id = id;
 376
 377         return packet;
 378 }
 379
 380 void iwm_rx_free(struct iwm_priv *iwm)
 381 {
 382         struct iwm_rx_ticket_node *ticket, *nt;
 383         struct iwm_rx_packet *packet, *np;
 384         int i;
 385
 386         list_for_each_entry_safe(ticket, nt, &iwm->rx_tickets, node) {
 387                 list_del(&ticket->node);
 388                 iwm_rx_ticket_node_free(ticket);
 389         }
 390
 391         for (i = 0; i < IWM_RX_ID_HASH; i++) {
 392                 list_for_each_entry_safe(packet, np, &iwm->rx_packets[i],
 393                                          node) {
 394                         list_del(&packet->node);
 395                         kfree_skb(packet->skb);
 396                         kfree(packet);
 397                 }
 398         }
 399 }
 400
 401 static int iwm_ntf_rx_ticket(struct iwm_priv *iwm, u8 *buf,
 402                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 403 {
 404         struct iwm_umac_notif_rx_ticket *ntf_rx_ticket =
 405                 (struct iwm_umac_notif_rx_ticket *)buf;
 406         struct iwm_rx_ticket *ticket =
 407                 (struct iwm_rx_ticket *)ntf_rx_ticket->tickets;
 408         int i, schedule_rx = 0;
 409
 410         for (i = 0; i < ntf_rx_ticket->num_tickets; i++) {
 411                 struct iwm_rx_ticket_node *ticket_node;
 412
 413                 switch (le16_to_cpu(ticket->action)) {
 414                 case IWM_RX_TICKET_RELEASE:
 415                 case IWM_RX_TICKET_DROP:
 416                         /* We can push the packet to the stack */
 417                         ticket_node = iwm_rx_ticket_node_alloc(iwm, ticket);
 418                         if (IS_ERR(ticket_node))
 419                                 return PTR_ERR(ticket_node);
 420
 421                         IWM_DBG_NTF(iwm, DBG, "TICKET RELEASE(%d)\n",
 422                                     ticket->id);
 423                         list_add_tail(&ticket_node->node, &iwm->rx_tickets);
 424
 425                         /*
 426                          * We received an Rx ticket, most likely there's
 427                          * a packet pending for it, it's not worth going
 428                          * through the packet hash list to double check.
 429                          * Let's just fire the rx worker..
 430                          */
 431                         schedule_rx = 1;
 432
 433                         break;
 434
 435                 default:
 436                         IWM_ERR(iwm, "Invalid RX ticket action: 0x%x\n",
 437                                 ticket->action);
 438                 }
 439
 440                 ticket++;
 441         }
 442
 443         if (schedule_rx)
 444                 queue_work(iwm->rx_wq, &iwm->rx_worker);
 445
 446         return 0;
 447 }
 448
 449 static int iwm_ntf_rx_packet(struct iwm_priv *iwm, u8 *buf,
 450                              unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 451 {
 452         struct iwm_umac_wifi_in_hdr *wifi_hdr;
 453         struct iwm_rx_packet *packet;
 454         u16 id, buf_offset;
 455         u32 packet_size;
 456
 457         IWM_DBG_NTF(iwm, DBG, "\n");
 458
 459         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
 460         id = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
 461         buf_offset = sizeof(struct iwm_umac_wifi_in_hdr);
 462         packet_size = buf_size - sizeof(struct iwm_umac_wifi_in_hdr);
 463
 464         IWM_DBG_NTF(iwm, DBG, "CMD:0x%x, seqnum: %d, packet size: %d\n",
 465                     wifi_hdr->sw_hdr.cmd.cmd, id, packet_size);
 466         IWM_DBG_RX(iwm, DBG, "Packet id: %d\n", id);
 467         IWM_HEXDUMP(iwm, DBG, RX, "PACKET: ", buf + buf_offset, packet_size);
 468
 469         packet = iwm_rx_packet_alloc(iwm, buf + buf_offset, packet_size, id);
 470         if (IS_ERR(packet))
 471                 return PTR_ERR(packet);
 472
 473         list_add_tail(&packet->node, &iwm->rx_packets[IWM_RX_ID_GET_HASH(id)]);
 474
 475         /* We might (unlikely) have received the packet _after_ the ticket */
 476         queue_work(iwm->rx_wq, &iwm->rx_worker);
 477
 478         return 0;
 479 }
 480
 481 /* MLME handlers */
 482 static int iwm_mlme_assoc_start(struct iwm_priv *iwm, u8 *buf,
 483                                 unsigned long buf_size,
 484                                 struct iwm_wifi_cmd *cmd)
 485 {
 486         struct iwm_umac_notif_assoc_start *start;
 487
 488         start = (struct iwm_umac_notif_assoc_start *)buf;
 489
 490         set_bit(IWM_STATUS_ASSOCIATING, &iwm->status);
 491
 492         IWM_DBG_MLME(iwm, INFO, "Association with %pM Started, reason: %d\n",
 493                      start->bssid, le32_to_cpu(start->roam_reason));
 494
 495         wake_up_interruptible(&iwm->mlme_queue);
 496
 497         return 0;
 498 }
 499
 500 static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
 501                                    unsigned long buf_size,
 502                                    struct iwm_wifi_cmd *cmd)
 503 {
 504         struct iwm_umac_notif_assoc_complete *complete =
 505                 (struct iwm_umac_notif_assoc_complete *)buf;
 506         union iwreq_data wrqu;
 507
 508         IWM_DBG_MLME(iwm, INFO, "Association with %pM completed, status: %d\n",
 509                      complete->bssid, complete->status);
 510
 511         memset(&wrqu, 0, sizeof(wrqu));
 512
 513         clear_bit(IWM_STATUS_ASSOCIATING, &iwm->status);
 514
 515         switch (le32_to_cpu(complete->status)) {
 516         case UMAC_ASSOC_COMPLETE_SUCCESS:
 517                 set_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 518                 memcpy(iwm->bssid, complete->bssid, ETH_ALEN);
 519                 iwm->channel = complete->channel;
 520
 521                 iwm_link_on(iwm);
 522
 523                 memcpy(wrqu.ap_addr.sa_data, complete->bssid, ETH_ALEN);
 524                 break;
 525         case UMAC_ASSOC_COMPLETE_FAILURE:
 526                 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 527                 memset(iwm->bssid, 0, ETH_ALEN);
 528                 iwm->channel = 0;
 529
 530                 iwm_link_off(iwm);
 531         default:
 532                 break;
 533         }
 534
 535         if (iwm->conf.mode == UMAC_MODE_IBSS) {
 536                 cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL);
 537                 return 0;
 538         }
 539
 540         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 541         wireless_send_event(iwm_to_ndev(iwm), SIOCGIWAP, &wrqu, NULL);
 542
 543         return 0;
 544 }
 545
 546 static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
 547                                        unsigned long buf_size,
 548                                        struct iwm_wifi_cmd *cmd)
 549 {
 550         struct iwm_umac_notif_profile_invalidate *invalid;
 551
 552         invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
 553
 554         IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n",
 555                      le32_to_cpu(invalid->reason));
 556
 557         clear_bit(IWM_STATUS_ASSOCIATING, &iwm->status);
 558         clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 559
 560         iwm->umac_profile_active = 0;
 561         memset(iwm->bssid, 0, ETH_ALEN);
 562         iwm->channel = 0;
 563
 564         iwm_link_off(iwm);
 565
 566         wake_up_interruptible(&iwm->mlme_queue);
 567
 568         return 0;
 569 }
 570
 571 static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf,
 572                                   unsigned long buf_size,
 573                                   struct iwm_wifi_cmd *cmd)
 574 {
 575         int ret;
 576         struct iwm_umac_notif_scan_complete *scan_complete =
 577                 (struct iwm_umac_notif_scan_complete *)buf;
 578         u32 result = le32_to_cpu(scan_complete->result);
 579
 580         IWM_DBG_MLME(iwm, INFO, "type:0x%x result:0x%x seq:%d\n",
 581                      le32_to_cpu(scan_complete->type),
 582                      le32_to_cpu(scan_complete->result),
 583                      scan_complete->seq_num);
 584
 585         if (!test_and_clear_bit(IWM_STATUS_SCANNING, &iwm->status)) {
 586                 IWM_ERR(iwm, "Scan complete while device not scanning\n");
 587                 return -EIO;
 588         }
 589         if (!iwm->scan_request)
 590                 return 0;
 591
 592         ret = iwm_cfg80211_inform_bss(iwm);
 593
 594         cfg80211_scan_done(iwm->scan_request,
 595                            (result & UMAC_SCAN_RESULT_ABORTED) ? 1 : !!ret);
 596         iwm->scan_request = NULL;
 597
 598         return ret;
 599 }
 600
 601 static int iwm_mlme_update_sta_table(struct iwm_priv *iwm, u8 *buf,
 602                                      unsigned long buf_size,
 603                                      struct iwm_wifi_cmd *cmd)
 604 {
 605         struct iwm_umac_notif_sta_info *umac_sta =
 606                         (struct iwm_umac_notif_sta_info *)buf;
 607         struct iwm_sta_info *sta;
 608         int i;
 609
 610         switch (le32_to_cpu(umac_sta->opcode)) {
 611         case UMAC_OPCODE_ADD_MODIFY:
 612                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 613
 614                 IWM_DBG_MLME(iwm, INFO, "%s STA: ID = %d, Color = %d, "
 615                              "addr = %pM, qos = %d\n",
 616                              sta->valid ? "Modify" : "Add",
 617                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 618                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 619                              umac_sta->mac_addr,
 620                              umac_sta->flags & UMAC_STA_FLAG_QOS);
 621
 622                 sta->valid = 1;
 623                 sta->qos = umac_sta->flags & UMAC_STA_FLAG_QOS;
 624                 sta->color = GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR);
 625                 memcpy(sta->addr, umac_sta->mac_addr, ETH_ALEN);
 626                 break;
 627         case UMAC_OPCODE_REMOVE:
 628                 IWM_DBG_MLME(iwm, INFO, "Remove STA: ID = %d, Color = %d, "
 629                              "addr = %pM\n",
 630                              GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
 631                              GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
 632                              umac_sta->mac_addr);
 633
 634                 sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
 635
 636                 if (!memcmp(sta->addr, umac_sta->mac_addr, ETH_ALEN))
 637                         sta->valid = 0;
 638
 639                 break;
 640         case UMAC_OPCODE_CLEAR_ALL:
 641                 for (i = 0; i < IWM_STA_TABLE_NUM; i++)
 642                         iwm->sta_table[i].valid = 0;
 643
 644                 break;
 645         default:
 646                 break;
 647         }
 648
 649         return 0;
 650 }
 651
 652 static int iwm_mlme_update_bss_table(struct iwm_priv *iwm, u8 *buf,
 653                                      unsigned long buf_size,
 654                                      struct iwm_wifi_cmd *cmd)
 655 {
 656         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 657         struct ieee80211_mgmt *mgmt;
 658         struct iwm_umac_notif_bss_info *umac_bss =
 659                         (struct iwm_umac_notif_bss_info *)buf;
 660         struct ieee80211_channel *channel;
 661         struct ieee80211_supported_band *band;
 662         struct iwm_bss_info *bss, *next;
 663         s32 signal;
 664         int freq;
 665         u16 frame_len = le16_to_cpu(umac_bss->frame_len);
 666         size_t bss_len = sizeof(struct iwm_umac_notif_bss_info) + frame_len;
 667
 668         mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf);
 669
 670         IWM_DBG_MLME(iwm, DBG, "New BSS info entry: %pM\n", mgmt->bssid);
 671         IWM_DBG_MLME(iwm, DBG, "\tType: 0x%x\n", le32_to_cpu(umac_bss->type));
 672         IWM_DBG_MLME(iwm, DBG, "\tTimestamp: %d\n",
 673                      le32_to_cpu(umac_bss->timestamp));
 674         IWM_DBG_MLME(iwm, DBG, "\tTable Index: %d\n",
 675                      le16_to_cpu(umac_bss->table_idx));
 676         IWM_DBG_MLME(iwm, DBG, "\tBand: %d\n", umac_bss->band);
 677         IWM_DBG_MLME(iwm, DBG, "\tChannel: %d\n", umac_bss->channel);
 678         IWM_DBG_MLME(iwm, DBG, "\tRSSI: %d\n", umac_bss->rssi);
 679         IWM_DBG_MLME(iwm, DBG, "\tFrame Length: %d\n", frame_len);
 680
 681         list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
 682                 if (bss->bss->table_idx == umac_bss->table_idx)
 683                         break;
 684
 685         if (&bss->node != &iwm->bss_list) {
 686                 /* Remove the old BSS entry, we will add it back later. */
 687                 list_del(&bss->node);
 688                 kfree(bss->bss);
 689         } else {
 690                 /* New BSS entry */
 691
 692                 bss = kzalloc(sizeof(struct iwm_bss_info), GFP_KERNEL);
 693                 if (!bss) {
 694                         IWM_ERR(iwm, "Couldn't allocate bss_info\n");
 695                         return -ENOMEM;
 696                 }
 697         }
 698
 699         bss->bss = kzalloc(bss_len, GFP_KERNEL);
 700         if (!bss) {
 701                 kfree(bss);
 702                 IWM_ERR(iwm, "Couldn't allocate bss\n");
 703                 return -ENOMEM;
 704         }
 705
 706         INIT_LIST_HEAD(&bss->node);
 707         memcpy(bss->bss, umac_bss, bss_len);
 708
 709         if (umac_bss->band == UMAC_BAND_2GHZ)
 710                 band = wiphy->bands[IEEE80211_BAND_2GHZ];
 711         else if (umac_bss->band == UMAC_BAND_5GHZ)
 712                 band = wiphy->bands[IEEE80211_BAND_5GHZ];
 713         else {
 714                 IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band);
 715                 goto err;
 716         }
 717
 718         freq = ieee80211_channel_to_frequency(umac_bss->channel);
 719         channel = ieee80211_get_channel(wiphy, freq);
 720         signal = umac_bss->rssi * 100;
 721
 722         bss->cfg_bss = cfg80211_inform_bss_frame(wiphy, channel,
 723                                                  mgmt, frame_len,
 724                                                  signal, GFP_KERNEL);
 725         if (!bss->cfg_bss)
 726                 goto err;
 727
 728         list_add_tail(&bss->node, &iwm->bss_list);
 729
 730         return 0;
 731  err:
 732         kfree(bss->bss);
 733         kfree(bss);
 734
 735         return -EINVAL;
 736 }
 737
 738 static int iwm_mlme_remove_bss(struct iwm_priv *iwm, u8 *buf,
 739                                unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 740 {
 741         struct iwm_umac_notif_bss_removed *bss_rm =
 742                 (struct iwm_umac_notif_bss_removed *)buf;
 743         struct iwm_bss_info *bss, *next;
 744         u16 table_idx;
 745         int i;
 746
 747         for (i = 0; i < le32_to_cpu(bss_rm->count); i++) {
 748                 table_idx = (le16_to_cpu(bss_rm->entries[i])
 749                              & IWM_BSS_REMOVE_INDEX_MSK);
 750                 list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
 751                         if (bss->bss->table_idx == cpu_to_le16(table_idx)) {
 752                                 struct ieee80211_mgmt *mgmt;
 753
 754                                 mgmt = (struct ieee80211_mgmt *)
 755                                         (bss->bss->frame_buf);
 756                                 IWM_DBG_MLME(iwm, ERR,
 757                                              "BSS removed: %pM\n",
 758                                              mgmt->bssid);
 759                                 list_del(&bss->node);
 760                                 kfree(bss->bss);
 761                                 kfree(bss);
 762                         }
 763         }
 764
 765         return 0;
 766 }
 767
 768 static int iwm_mlme_mgt_frame(struct iwm_priv *iwm, u8 *buf,
 769                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 770 {
 771         struct iwm_umac_notif_mgt_frame *mgt_frame =
 772         (struct iwm_umac_notif_mgt_frame *)buf;
 773         struct ieee80211_mgmt *mgt = (struct ieee80211_mgmt *)mgt_frame->frame;
 774         u8 *ie;
 775         unsigned int event;
 776         union iwreq_data wrqu;
 777
 778         IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame,
 779                     le16_to_cpu(mgt_frame->len));
 780
 781         if (ieee80211_is_assoc_req(mgt->frame_control)) {
 782                 ie = mgt->u.assoc_req.variable;;
 783                 event = IWEVASSOCREQIE;
 784         } else if (ieee80211_is_reassoc_req(mgt->frame_control)) {
 785                 ie = mgt->u.reassoc_req.variable;;
 786                 event = IWEVASSOCREQIE;
 787         } else if (ieee80211_is_assoc_resp(mgt->frame_control)) {
 788                 ie = mgt->u.assoc_resp.variable;;
 789                 event = IWEVASSOCRESPIE;
 790         } else if (ieee80211_is_reassoc_resp(mgt->frame_control)) {
 791                 ie = mgt->u.reassoc_resp.variable;;
 792                 event = IWEVASSOCRESPIE;
 793         } else {
 794                 IWM_ERR(iwm, "Unsupported management frame");
 795                 return 0;
 796         }
 797
 798         wrqu.data.length = le16_to_cpu(mgt_frame->len) - (ie - (u8 *)mgt);
 799
 800         IWM_HEXDUMP(iwm, DBG, MLME, "EVT: ", ie, wrqu.data.length);
 801         wireless_send_event(iwm_to_ndev(iwm), event, &wrqu, ie);
 802
 803         return 0;
 804 }
 805
 806 static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf,
 807                         unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 808 {
 809         struct iwm_umac_notif_wifi_if *notif =
 810                 (struct iwm_umac_notif_wifi_if *)buf;
 811
 812         switch (notif->status) {
 813         case WIFI_IF_NTFY_ASSOC_START:
 814                 return iwm_mlme_assoc_start(iwm, buf, buf_size, cmd);
 815         case WIFI_IF_NTFY_ASSOC_COMPLETE:
 816                 return iwm_mlme_assoc_complete(iwm, buf, buf_size, cmd);
 817         case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE:
 818                 return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd);
 819         case WIFI_IF_NTFY_CONNECTION_TERMINATED:
 820                 IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
 821                 break;
 822         case WIFI_IF_NTFY_SCAN_COMPLETE:
 823                 return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd);
 824         case WIFI_IF_NTFY_STA_TABLE_CHANGE:
 825                 return iwm_mlme_update_sta_table(iwm, buf, buf_size, cmd);
 826         case WIFI_IF_NTFY_EXTENDED_IE_REQUIRED:
 827                 IWM_DBG_MLME(iwm, DBG, "Extended IE required\n");
 828                 break;
 829         case WIFI_IF_NTFY_BSS_TRK_TABLE_CHANGED:
 830                 return iwm_mlme_update_bss_table(iwm, buf, buf_size, cmd);
 831         case WIFI_IF_NTFY_BSS_TRK_ENTRIES_REMOVED:
 832                 return iwm_mlme_remove_bss(iwm, buf, buf_size, cmd);
 833                 break;
 834         case WIFI_IF_NTFY_MGMT_FRAME:
 835                 return iwm_mlme_mgt_frame(iwm, buf, buf_size, cmd);
 836         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_START:
 837         case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_COMPLETE:
 838         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_START:
 839         case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_RESULT:
 840         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_START:
 841         case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_COMPLETE:
 842         case WIFI_DBG_IF_NTFY_CNCT_ATC_START:
 843         case WIFI_DBG_IF_NTFY_COEX_NOTIFICATION:
 844         case WIFI_DBG_IF_NTFY_COEX_HANDLE_ENVELOP:
 845         case WIFI_DBG_IF_NTFY_COEX_HANDLE_RELEASE_ENVELOP:
 846                 IWM_DBG_MLME(iwm, DBG, "MLME debug notification: 0x%x\n",
 847                              notif->status);
 848                 break;
 849         default:
 850                 IWM_ERR(iwm, "Unhandled notification: 0x%x\n", notif->status);
 851                 break;
 852         }
 853
 854         return 0;
 855 }
 856
 857 #define IWM_STATS_UPDATE_INTERVAL               (2 * HZ)
 858
 859 static int iwm_ntf_statistics(struct iwm_priv *iwm, u8 *buf,
 860                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
 861 {
 862         struct iwm_umac_notif_stats *stats = (struct iwm_umac_notif_stats *)buf;
 863         struct iw_statistics *wstats = &iwm->wstats;
 864         u16 max_rate = 0;
 865         int i;
 866
 867         IWM_DBG_MLME(iwm, DBG, "Statistics notification received\n");
 868
 869         if (test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) {
 870                 for (i = 0; i < UMAC_NTF_RATE_SAMPLE_NR; i++) {
 871                         max_rate = max_t(u16, max_rate,
 872                                          max(le16_to_cpu(stats->tx_rate[i]),
 873                                              le16_to_cpu(stats->rx_rate[i])));
 874                 }
 875                 /* UMAC passes rate info multiplies by 2 */
 876                 iwm->rate = max_rate >> 1;
 877         }
 878
 879         wstats->status = 0;
 880
 881         wstats->discard.nwid = le32_to_cpu(stats->rx_drop_other_bssid);
 882         wstats->discard.code = le32_to_cpu(stats->rx_drop_decode);
 883         wstats->discard.fragment = le32_to_cpu(stats->rx_drop_reassembly);
 884         wstats->discard.retries = le32_to_cpu(stats->tx_drop_max_retry);
 885
 886         wstats->miss.beacon = le32_to_cpu(stats->missed_beacons);
 887
 888         /* according to cfg80211 */
 889         if (stats->rssi_dbm < -110)
 890                 wstats->qual.qual = 0;
 891         else if (stats->rssi_dbm > -40)
 892                 wstats->qual.qual = 70;
 893         else
 894                 wstats->qual.qual = stats->rssi_dbm + 110;
 895
 896         wstats->qual.level = stats->rssi_dbm;
 897         wstats->qual.noise = stats->noise_dbm;
 898         wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
 899
 900         schedule_delayed_work(&iwm->stats_request, IWM_STATS_UPDATE_INTERVAL);
 901
 902         mod_timer(&iwm->watchdog, round_jiffies(jiffies + IWM_WATCHDOG_PERIOD));
 903
 904         return 0;
 905 }
 906
 907 static int iwm_ntf_eeprom_proxy(struct iwm_priv *iwm, u8 *buf,
 908                                 unsigned long buf_size,
 909                                 struct iwm_wifi_cmd *cmd)
 910 {
 911         struct iwm_umac_cmd_eeprom_proxy *eeprom_proxy =
 912                 (struct iwm_umac_cmd_eeprom_proxy *)
 913                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 914         struct iwm_umac_cmd_eeprom_proxy_hdr *hdr = &eeprom_proxy->hdr;
 915         u32 hdr_offset = le32_to_cpu(hdr->offset);
 916         u32 hdr_len = le32_to_cpu(hdr->len);
 917         u32 hdr_type = le32_to_cpu(hdr->type);
 918
 919         IWM_DBG_NTF(iwm, DBG, "type: 0x%x, len: %d, offset: 0x%x\n",
 920                     hdr_type, hdr_len, hdr_offset);
 921
 922         if ((hdr_offset + hdr_len) > IWM_EEPROM_LEN)
 923                 return -EINVAL;
 924
 925 #ifdef CONFIG_IWM_B0_HW_SUPPORT
 926         if (hdr_offset == IWM_EEPROM_SKU_CAP_OFF) {
 927                 if (eeprom_proxy->buf[0] == 0xff)
 928                         iwm->conf.hw_b0 = 1;
 929         }
 930 #endif
 931
 932         switch (hdr_type) {
 933         case IWM_UMAC_CMD_EEPROM_TYPE_READ:
 934                 memcpy(iwm->eeprom + hdr_offset, eeprom_proxy->buf, hdr_len);
 935                 break;
 936         case IWM_UMAC_CMD_EEPROM_TYPE_WRITE:
 937         default:
 938                 return -ENOTSUPP;
 939         }
 940
 941         return 0;
 942 }
 943
 944 static int iwm_ntf_channel_info_list(struct iwm_priv *iwm, u8 *buf,
 945                                      unsigned long buf_size,
 946                                      struct iwm_wifi_cmd *cmd)
 947 {
 948         struct iwm_umac_cmd_get_channel_list *ch_list =
 949                         (struct iwm_umac_cmd_get_channel_list *)
 950                         (buf + sizeof(struct iwm_umac_wifi_in_hdr));
 951         struct wiphy *wiphy = iwm_to_wiphy(iwm);
 952         struct ieee80211_supported_band *band;
 953         int i;
 954
 955         band = wiphy->bands[IEEE80211_BAND_2GHZ];
 956
 957         for (i = 0; i < band->n_channels; i++) {
 958                 unsigned long ch_mask_0 =
 959                         le32_to_cpu(ch_list->ch[0].channels_mask);
 960                 unsigned long ch_mask_2 =
 961                         le32_to_cpu(ch_list->ch[2].channels_mask);
 962
 963                 if (!test_bit(i, &ch_mask_0))
 964                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
 965
 966                 if (!test_bit(i, &ch_mask_2))
 967                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
 968         }
 969
 970         band = wiphy->bands[IEEE80211_BAND_5GHZ];
 971
 972         for (i = 0; i < min(band->n_channels, 32); i++) {
 973                 unsigned long ch_mask_1 =
 974                         le32_to_cpu(ch_list->ch[1].channels_mask);
 975                 unsigned long ch_mask_3 =
 976                         le32_to_cpu(ch_list->ch[3].channels_mask);
 977
 978                 if (!test_bit(i, &ch_mask_1))
 979                         band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
 980
 981                 if (!test_bit(i, &ch_mask_3))
 982                         band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
 983         }
 984
 985         return 0;
 986 }
 987
 988 static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf,
 989                                    unsigned long buf_size,
 990                                    struct iwm_wifi_cmd *cmd)
 991 {
 992         struct iwm_umac_wifi_if *hdr =
 993                         (struct iwm_umac_wifi_if *)cmd->buf.payload;
 994
 995         IWM_DBG_NTF(iwm, DBG, "WIFI_IF_WRAPPER cmd is delivered to UMAC: "
 996                     "oid is 0x%x\n", hdr->oid);
 997
 998         if (hdr->oid <= WIFI_IF_NTFY_MAX) {
 999                 set_bit(hdr->oid, &iwm->wifi_ntfy[0]);
1000                 wake_up_interruptible(&iwm->wifi_ntfy_queue);
1001         } else
1002                 return -EINVAL;
1003
1004         switch (hdr->oid) {
1005         case UMAC_WIFI_IF_CMD_SET_PROFILE:
1006                 iwm->umac_profile_active = 1;
1007                 break;
1008         default:
1009                 break;
1010         }
1011
1012         return 0;
1013 }
1014
1015 static int iwm_ntf_card_state(struct iwm_priv *iwm, u8 *buf,
1016                               unsigned long buf_size, struct iwm_wifi_cmd *cmd)
1017 {
1018         struct iwm_lmac_card_state *state = (struct iwm_lmac_card_state *)
1019                                 (buf + sizeof(struct iwm_umac_wifi_in_hdr));
1020         u32 flags = le32_to_cpu(state->flags);
1021
1022         IWM_INFO(iwm, "HW RF Kill %s, CT Kill %s\n",
1023                  flags & IWM_CARD_STATE_HW_DISABLED ? "ON" : "OFF",
1024                  flags & IWM_CARD_STATE_CTKILL_DISABLED ? "ON" : "OFF");
1025
1026         if (flags & IWM_CARD_STATE_HW_DISABLED)
1027                 set_bit(IWM_RADIO_RFKILL_HW, &iwm->radio);
1028         else
1029                 clear_bit(IWM_RADIO_RFKILL_HW, &iwm->radio);
1030
1031         return 0;
1032 }
1033
1034 static int iwm_rx_handle_wifi(struct iwm_priv *iwm, u8 *buf,
1035                               unsigned long buf_size)
1036 {
1037         struct iwm_umac_wifi_in_hdr *wifi_hdr;
1038         struct iwm_wifi_cmd *cmd;
1039         u8 source, cmd_id;
1040         u16 seq_num;
1041         u32 count;
1042         u8 resp;
1043
1044         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1045         cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1046
1047         source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1048         if (source >= IWM_SRC_NUM) {
1049                 IWM_CRIT(iwm, "invalid source %d\n", source);
1050                 return -EINVAL;
1051         }
1052
1053         count = (GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_BYTE_COUNT));
1054         count += sizeof(struct iwm_umac_wifi_in_hdr) -
1055                  sizeof(struct iwm_dev_cmd_hdr);
1056         if (count > buf_size) {
1057                 IWM_CRIT(iwm, "count %d, buf size:%ld\n", count, buf_size);
1058                 return -EINVAL;
1059         }
1060
1061         resp = GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_STATUS);
1062
1063         seq_num = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
1064
1065         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x, seqnum: %d\n",
1066                    cmd_id, source, seq_num);
1067
1068         /*
1069          * If this is a response to a previously sent command, there must
1070          * be a pending command for this sequence number.
1071          */
1072         cmd = iwm_get_pending_wifi_cmd(iwm, seq_num);
1073
1074         /* Notify the caller only for sync commands. */
1075         switch (source) {
1076         case UMAC_HDI_IN_SOURCE_FHRX:
1077                 if (iwm->lmac_handlers[cmd_id] &&
1078                     test_bit(cmd_id, &iwm->lmac_handler_map[0]))
1079                         return iwm_notif_send(iwm, cmd, cmd_id, source,
1080                                               buf, count);
1081                 break;
1082         case UMAC_HDI_IN_SOURCE_FW:
1083                 if (iwm->umac_handlers[cmd_id] &&
1084                     test_bit(cmd_id, &iwm->umac_handler_map[0]))
1085                         return iwm_notif_send(iwm, cmd, cmd_id, source,
1086                                               buf, count);
1087                 break;
1088         case UMAC_HDI_IN_SOURCE_UDMA:
1089                 break;
1090         }
1091
1092         return iwm_rx_handle_resp(iwm, buf, count, cmd);
1093 }
1094
1095 int iwm_rx_handle_resp(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size,
1096                        struct iwm_wifi_cmd *cmd)
1097 {
1098         u8 source, cmd_id;
1099         struct iwm_umac_wifi_in_hdr *wifi_hdr;
1100         int ret = 0;
1101
1102         wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
1103         cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
1104
1105         source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
1106
1107         IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x\n", cmd_id, source);
1108
1109         switch (source) {
1110         case UMAC_HDI_IN_SOURCE_FHRX:
1111                 if (iwm->lmac_handlers[cmd_id])
1112                         ret = iwm->lmac_handlers[cmd_id]
1113                                         (iwm, buf, buf_size, cmd);
1114                 break;
1115         case UMAC_HDI_IN_SOURCE_FW:
1116                 if (iwm->umac_handlers[cmd_id])
1117                         ret = iwm->umac_handlers[cmd_id]
1118                                         (iwm, buf, buf_size, cmd);
1119                 break;
1120         case UMAC_HDI_IN_SOURCE_UDMA:
1121                 ret = -EINVAL;
1122                 break;
1123         }
1124
1125         kfree(cmd);
1126
1127         return ret;
1128 }
1129
1130 static int iwm_rx_handle_nonwifi(struct iwm_priv *iwm, u8 *buf,
1131                                  unsigned long buf_size)
1132 {
1133         u8 seq_num;
1134         struct iwm_udma_in_hdr *hdr = (struct iwm_udma_in_hdr *)buf;
1135         struct iwm_nonwifi_cmd *cmd, *next;
1136
1137         seq_num = GET_VAL32(hdr->cmd, UDMA_HDI_IN_CMD_NON_WIFI_HW_SEQ_NUM);
1138
1139         /*
1140          * We received a non wifi answer.
1141          * Let's check if there's a pending command for it, and if so
1142          * replace the command payload with the buffer, and then wake the
1143          * callers up.
1144          * That means we only support synchronised non wifi command response
1145          * schemes.
1146          */
1147         list_for_each_entry_safe(cmd, next, &iwm->nonwifi_pending_cmd, pending)
1148                 if (cmd->seq_num == seq_num) {
1149                         cmd->resp_received = 1;
1150                         cmd->buf.len = buf_size;
1151                         memcpy(cmd->buf.hdr, buf, buf_size);
1152                         wake_up_interruptible(&iwm->nonwifi_queue);
1153                 }
1154
1155         return 0;
1156 }
1157
1158 static int iwm_rx_handle_umac(struct iwm_priv *iwm, u8 *buf,
1159                               unsigned long buf_size)
1160 {
1161         int ret = 0;
1162         u8 op_code;
1163         unsigned long buf_offset = 0;
1164         struct iwm_udma_in_hdr *hdr;
1165
1166         /*
1167          * To allow for a more efficient bus usage, UMAC
1168          * messages are encapsulated into UDMA ones. This
1169          * way we can have several UMAC messages in one bus
1170          * transfer.
1171          * A UDMA frame size is always aligned on 16 bytes,
1172          * and a UDMA frame must not start with a UMAC_PAD_TERMINAL
1173          * word. This is how we parse a bus frame into several
1174          * UDMA ones.
1175          */
1176         while (buf_offset < buf_size) {
1177
1178                 hdr = (struct iwm_udma_in_hdr *)(buf + buf_offset);
1179
1180                 if (iwm_rx_check_udma_hdr(hdr) < 0) {
1181                         IWM_DBG_RX(iwm, DBG, "End of frame\n");
1182                         break;
1183                 }
1184
1185                 op_code = GET_VAL32(hdr->cmd, UMAC_HDI_IN_CMD_OPCODE);
1186
1187                 IWM_DBG_RX(iwm, DBG, "Op code: 0x%x\n", op_code);
1188
1189                 if (op_code == UMAC_HDI_IN_OPCODE_WIFI) {
1190                         ret |= iwm_rx_handle_wifi(iwm, buf + buf_offset,
1191                                                   buf_size - buf_offset);
1192                 } else if (op_code < UMAC_HDI_IN_OPCODE_NONWIFI_MAX) {
1193                         if (GET_VAL32(hdr->cmd,
1194                                       UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) !=
1195                             UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) {
1196                                 IWM_ERR(iwm, "Incorrect hw signature\n");
1197                                 return -EINVAL;
1198                         }
1199                         ret |= iwm_rx_handle_nonwifi(iwm, buf + buf_offset,
1200                                                      buf_size - buf_offset);
1201                 } else {
1202                         IWM_ERR(iwm, "Invalid RX opcode: 0x%x\n", op_code);
1203                         ret |= -EINVAL;
1204                 }
1205
1206                 buf_offset += iwm_rx_resp_size(hdr);
1207         }
1208
1209         return ret;
1210 }
1211
1212 int iwm_rx_handle(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size)
1213 {
1214         struct iwm_udma_in_hdr *hdr;
1215
1216         hdr = (struct iwm_udma_in_hdr *)buf;
1217
1218         switch (le32_to_cpu(hdr->cmd)) {
1219         case UMAC_REBOOT_BARKER:
1220                 return iwm_notif_send(iwm, NULL, IWM_BARKER_REBOOT_NOTIFICATION,
1221                                       IWM_SRC_UDMA, buf, buf_size);
1222         case UMAC_ACK_BARKER:
1223                 return iwm_notif_send(iwm, NULL, IWM_ACK_BARKER_NOTIFICATION,
1224                                       IWM_SRC_UDMA, NULL, 0);
1225         default:
1226                 IWM_DBG_RX(iwm, DBG, "Received cmd: 0x%x\n", hdr->cmd);
1227                 return iwm_rx_handle_umac(iwm, buf, buf_size);
1228         }
1229
1230         return 0;
1231 }
1232
1233 static const iwm_handler iwm_umac_handlers[] =
1234 {
1235         [UMAC_NOTIFY_OPCODE_ERROR]              = iwm_ntf_error,
1236         [UMAC_NOTIFY_OPCODE_ALIVE]              = iwm_ntf_umac_alive,
1237         [UMAC_NOTIFY_OPCODE_INIT_COMPLETE]      = iwm_ntf_init_complete,
1238         [UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS]   = iwm_ntf_wifi_status,
1239         [UMAC_NOTIFY_OPCODE_WIFI_IF_WRAPPER]    = iwm_ntf_mlme,
1240         [UMAC_NOTIFY_OPCODE_PAGE_DEALLOC]       = iwm_ntf_tx_credit_update,
1241         [UMAC_NOTIFY_OPCODE_RX_TICKET]          = iwm_ntf_rx_ticket,
1242         [UMAC_CMD_OPCODE_RESET]                 = iwm_ntf_umac_reset,
1243         [UMAC_NOTIFY_OPCODE_STATS]              = iwm_ntf_statistics,
1244         [UMAC_CMD_OPCODE_EEPROM_PROXY]          = iwm_ntf_eeprom_proxy,
1245         [UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST]    = iwm_ntf_channel_info_list,
1246         [REPLY_RX_MPDU_CMD]                     = iwm_ntf_rx_packet,
1247         [UMAC_CMD_OPCODE_WIFI_IF_WRAPPER]       = iwm_ntf_wifi_if_wrapper,
1248 };
1249
1250 static const iwm_handler iwm_lmac_handlers[] =
1251 {
1252         [REPLY_TX]                              = iwm_ntf_tx,
1253         [REPLY_ALIVE]                           = iwm_ntf_lmac_version,
1254         [CALIBRATION_RES_NOTIFICATION]          = iwm_ntf_calib_res,
1255         [CALIBRATION_COMPLETE_NOTIFICATION]     = iwm_ntf_calib_complete,
1256         [CALIBRATION_CFG_CMD]                   = iwm_ntf_calib_cfg,
1257         [REPLY_RX_MPDU_CMD]                     = iwm_ntf_rx_packet,
1258         [CARD_STATE_NOTIFICATION]               = iwm_ntf_card_state,
1259 };
1260
1261 void iwm_rx_setup_handlers(struct iwm_priv *iwm)
1262 {
1263         iwm->umac_handlers = (iwm_handler *) iwm_umac_handlers;
1264         iwm->lmac_handlers = (iwm_handler *) iwm_lmac_handlers;
1265 }
1266
1267 static void iwm_remove_iv(struct sk_buff *skb, u32 hdr_total_len)
1268 {
1269         struct ieee80211_hdr *hdr;
1270         unsigned int hdr_len;
1271
1272         hdr = (struct ieee80211_hdr *)skb->data;
1273
1274         if (!ieee80211_has_protected(hdr->frame_control))
1275                 return;
1276
1277         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1278         if (hdr_total_len <= hdr_len)
1279                 return;
1280
1281         memmove(skb->data + (hdr_total_len - hdr_len), skb->data, hdr_len);
1282         skb_pull(skb, (hdr_total_len - hdr_len));
1283 }
1284
1285 static void iwm_rx_adjust_packet(struct iwm_priv *iwm,
1286                                  struct iwm_rx_packet *packet,
1287                                  struct iwm_rx_ticket_node *ticket_node)
1288 {
1289         u32 payload_offset = 0, payload_len;
1290         struct iwm_rx_ticket *ticket = ticket_node->ticket;
1291         struct iwm_rx_mpdu_hdr *mpdu_hdr;
1292         struct ieee80211_hdr *hdr;
1293
1294         mpdu_hdr = (struct iwm_rx_mpdu_hdr *)packet->skb->data;
1295         payload_offset += sizeof(struct iwm_rx_mpdu_hdr);
1296         /* Padding is 0 or 2 bytes */
1297         payload_len = le16_to_cpu(mpdu_hdr->len) +
1298                 (le16_to_cpu(ticket->flags) & IWM_RX_TICKET_PAD_SIZE_MSK);
1299         payload_len -= ticket->tail_len;
1300
1301         IWM_DBG_RX(iwm, DBG, "Packet adjusted, len:%d, offset:%d, "
1302                    "ticket offset:%d ticket tail len:%d\n",
1303                    payload_len, payload_offset, ticket->payload_offset,
1304                    ticket->tail_len);
1305
1306         IWM_HEXDUMP(iwm, DBG, RX, "RAW: ", packet->skb->data, packet->skb->len);
1307
1308         skb_pull(packet->skb, payload_offset);
1309         skb_trim(packet->skb, payload_len);
1310
1311         iwm_remove_iv(packet->skb, ticket->payload_offset);
1312
1313         hdr = (struct ieee80211_hdr *) packet->skb->data;
1314         if (ieee80211_is_data_qos(hdr->frame_control)) {
1315                 /* UMAC handed QOS_DATA frame with 2 padding bytes appended
1316                  * to the qos_ctl field in IEEE 802.11 headers. */
1317                 memmove(packet->skb->data + IEEE80211_QOS_CTL_LEN + 2,
1318                         packet->skb->data,
1319                         ieee80211_hdrlen(hdr->frame_control) -
1320                         IEEE80211_QOS_CTL_LEN);
1321                 hdr = (struct ieee80211_hdr *) skb_pull(packet->skb,
1322                                 IEEE80211_QOS_CTL_LEN + 2);
1323                 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1324         }
1325
1326         IWM_HEXDUMP(iwm, DBG, RX, "ADJUSTED: ",
1327                     packet->skb->data, packet->skb->len);
1328 }
1329
1330 static void classify8023(struct sk_buff *skb)
1331 {
1332         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1333
1334         if (ieee80211_is_data_qos(hdr->frame_control)) {
1335                 u8 *qc = ieee80211_get_qos_ctl(hdr);
1336                 /* frame has qos control */
1337                 skb->priority = *qc & IEEE80211_QOS_CTL_TID_MASK;
1338         } else {
1339                 skb->priority = 0;
1340         }
1341 }
1342
1343 static void iwm_rx_process_packet(struct iwm_priv *iwm,
1344                                   struct iwm_rx_packet *packet,
1345                                   struct iwm_rx_ticket_node *ticket_node)
1346 {
1347         int ret;
1348         struct sk_buff *skb = packet->skb;
1349         struct wireless_dev *wdev = iwm_to_wdev(iwm);
1350         struct net_device *ndev = iwm_to_ndev(iwm);
1351
1352         IWM_DBG_RX(iwm, DBG, "Processing packet ID %d\n", packet->id);
1353
1354         switch (le16_to_cpu(ticket_node->ticket->action)) {
1355         case IWM_RX_TICKET_RELEASE:
1356                 IWM_DBG_RX(iwm, DBG, "RELEASE packet\n");
1357                 classify8023(skb);
1358                 iwm_rx_adjust_packet(iwm, packet, ticket_node);
1359                 ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype);
1360                 if (ret < 0) {
1361                         IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - "
1362                                    "%d\n", ret);
1363                         break;
1364                 }
1365
1366                 IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
1367
1368                 skb->dev = iwm_to_ndev(iwm);
1369                 skb->protocol = eth_type_trans(skb, ndev);
1370                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1371                 memset(skb->cb, 0, sizeof(skb->cb));
1372
1373                 ndev->stats.rx_packets++;
1374                 ndev->stats.rx_bytes += skb->len;
1375
1376                 if (netif_rx(skb) == NET_RX_DROP) {
1377                         IWM_ERR(iwm, "Packet dropped\n");
1378                         ndev->stats.rx_dropped++;
1379                 }
1380                 break;
1381         case IWM_RX_TICKET_DROP:
1382                 IWM_DBG_RX(iwm, DBG, "DROP packet\n");
1383                 kfree_skb(packet->skb);
1384                 break;
1385         default:
1386                 IWM_ERR(iwm, "Unknow ticket action: %d\n",
1387                         le16_to_cpu(ticket_node->ticket->action));
1388                 kfree_skb(packet->skb);
1389         }
1390
1391         kfree(packet);
1392         iwm_rx_ticket_node_free(ticket_node);
1393 }
1394
1395 /*
1396  * Rx data processing:
1397  *
1398  * We're receiving Rx packet from the LMAC, and Rx ticket from
1399  * the UMAC.
1400  * To forward a target data packet upstream (i.e. to the
1401  * kernel network stack), we must have received an Rx ticket
1402  * that tells us we're allowed to release this packet (ticket
1403  * action is IWM_RX_TICKET_RELEASE). The Rx ticket also indicates,
1404  * among other things, where valid data actually starts in the Rx
1405  * packet.
1406  */
1407 void iwm_rx_worker(struct work_struct *work)
1408 {
1409         struct iwm_priv *iwm;
1410         struct iwm_rx_ticket_node *ticket, *next;
1411
1412         iwm = container_of(work, struct iwm_priv, rx_worker);
1413
1414         /*
1415          * We go through the tickets list and if there is a pending
1416          * packet for it, we push it upstream.
1417          * We stop whenever a ticket is missing its packet, as we're
1418          * supposed to send the packets in order.
1419          */
1420         list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
1421                 struct iwm_rx_packet *packet =
1422                         iwm_rx_packet_get(iwm, le16_to_cpu(ticket->ticket->id));
1423
1424                 if (!packet) {
1425                         IWM_DBG_RX(iwm, DBG, "Skip rx_work: Wait for ticket %d "
1426                                    "to be handled first\n",
1427                                    le16_to_cpu(ticket->ticket->id));
1428                         return;
1429                 }
1430
1431                 list_del(&ticket->node);
1432                 list_del(&packet->node);
1433                 iwm_rx_process_packet(iwm, packet, ticket);
1434         }
1435 }
1436