drivers/net/wireless/ath/wil6210/wmi.c

   1 /*
   2  * Copyright (c) 2012-2014 Qualcomm Atheros, Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/moduleparam.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/if_arp.h>
  20
  21 #include "wil6210.h"
  22 #include "txrx.h"
  23 #include "wmi.h"
  24 #include "trace.h"
  25
  26 static uint max_assoc_sta = 1;
  27 module_param(max_assoc_sta, uint, S_IRUGO | S_IWUSR);
  28 MODULE_PARM_DESC(max_assoc_sta, " Max number of stations associated to the AP");
  29
  30 /**
  31  * WMI event receiving - theory of operations
  32  *
  33  * When firmware about to report WMI event, it fills memory area
  34  * in the mailbox and raises misc. IRQ. Thread interrupt handler invoked for
  35  * the misc IRQ, function @wmi_recv_cmd called by thread IRQ handler.
  36  *
  37  * @wmi_recv_cmd reads event, allocates memory chunk  and attaches it to the
  38  * event list @wil->pending_wmi_ev. Then, work queue @wil->wmi_wq wakes up
  39  * and handles events within the @wmi_event_worker. Every event get detached
  40  * from list, processed and deleted.
  41  *
  42  * Purpose for this mechanism is to release IRQ thread; otherwise,
  43  * if WMI event handling involves another WMI command flow, this 2-nd flow
  44  * won't be completed because of blocked IRQ thread.
  45  */
  46
  47 /**
  48  * Addressing - theory of operations
  49  *
  50  * There are several buses present on the WIL6210 card.
  51  * Same memory areas are visible at different address on
  52  * the different busses. There are 3 main bus masters:
  53  *  - MAC CPU (ucode)
  54  *  - User CPU (firmware)
  55  *  - AHB (host)
  56  *
  57  * On the PCI bus, there is one BAR (BAR0) of 2Mb size, exposing
  58  * AHB addresses starting from 0x880000
  59  *
  60  * Internally, firmware uses addresses that allows faster access but
  61  * are invisible from the host. To read from these addresses, alternative
  62  * AHB address must be used.
  63  *
  64  * Memory mapping
  65  * Linker address         PCI/Host address
  66  *                        0x880000 .. 0xa80000  2Mb BAR0
  67  * 0x800000 .. 0x807000   0x900000 .. 0x907000  28k DCCM
  68  * 0x840000 .. 0x857000   0x908000 .. 0x91f000  92k PERIPH
  69  */
  70
  71 /**
  72  * @fw_mapping provides memory remapping table
  73  *
  74  * array size should be in sync with the declaration in the wil6210.h
  75  */
  76 const struct fw_map fw_mapping[] = {
  77         {0x000000, 0x040000, 0x8c0000, "fw_code"}, /* FW code RAM      256k */
  78         {0x800000, 0x808000, 0x900000, "fw_data"}, /* FW data RAM       32k */
  79         {0x840000, 0x860000, 0x908000, "fw_peri"}, /* periph. data RAM 128k */
  80         {0x880000, 0x88a000, 0x880000, "rgf"},     /* various RGF       40k */
  81         {0x88a000, 0x88b000, 0x88a000, "AGC_tbl"}, /* AGC table          4k */
  82         {0x88b000, 0x88c000, 0x88b000, "rgf_ext"}, /* Pcie_ext_rgf       4k */
  83         {0x8c0000, 0x949000, 0x8c0000, "upper"},   /* upper area       548k */
  84         /*
  85          * 920000..930000 ucode code RAM
  86          * 930000..932000 ucode data RAM
  87          * 932000..949000 back-door debug data
  88          */
  89 };
  90
  91 /**
  92  * return AHB address for given firmware/ucode internal (linker) address
  93  * @x - internal address
  94  * If address have no valid AHB mapping, return 0
  95  */
  96 static u32 wmi_addr_remap(u32 x)
  97 {
  98         uint i;
  99
 100         for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
 101                 if ((x >= fw_mapping[i].from) && (x < fw_mapping[i].to))
 102                         return x + fw_mapping[i].host - fw_mapping[i].from;
 103         }
 104
 105         return 0;
 106 }
 107
 108 /**
 109  * Check address validity for WMI buffer; remap if needed
 110  * @ptr - internal (linker) fw/ucode address
 111  *
 112  * Valid buffer should be DWORD aligned
 113  *
 114  * return address for accessing buffer from the host;
 115  * if buffer is not valid, return NULL.
 116  */
 117 void __iomem *wmi_buffer(struct wil6210_priv *wil, __le32 ptr_)
 118 {
 119         u32 off;
 120         u32 ptr = le32_to_cpu(ptr_);
 121
 122         if (ptr % 4)
 123                 return NULL;
 124
 125         ptr = wmi_addr_remap(ptr);
 126         if (ptr < WIL6210_FW_HOST_OFF)
 127                 return NULL;
 128
 129         off = HOSTADDR(ptr);
 130         if (off > WIL6210_MEM_SIZE - 4)
 131                 return NULL;
 132
 133         return wil->csr + off;
 134 }
 135
 136 /**
 137  * Check address validity
 138  */
 139 void __iomem *wmi_addr(struct wil6210_priv *wil, u32 ptr)
 140 {
 141         u32 off;
 142
 143         if (ptr % 4)
 144                 return NULL;
 145
 146         if (ptr < WIL6210_FW_HOST_OFF)
 147                 return NULL;
 148
 149         off = HOSTADDR(ptr);
 150         if (off > WIL6210_MEM_SIZE - 4)
 151                 return NULL;
 152
 153         return wil->csr + off;
 154 }
 155
 156 int wmi_read_hdr(struct wil6210_priv *wil, __le32 ptr,
 157                  struct wil6210_mbox_hdr *hdr)
 158 {
 159         void __iomem *src = wmi_buffer(wil, ptr);
 160         if (!src)
 161                 return -EINVAL;
 162
 163         wil_memcpy_fromio_32(hdr, src, sizeof(*hdr));
 164
 165         return 0;
 166 }
 167
 168 static int __wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
 169 {
 170         struct {
 171                 struct wil6210_mbox_hdr hdr;
 172                 struct wil6210_mbox_hdr_wmi wmi;
 173         } __packed cmd = {
 174                 .hdr = {
 175                         .type = WIL_MBOX_HDR_TYPE_WMI,
 176                         .flags = 0,
 177                         .len = cpu_to_le16(sizeof(cmd.wmi) + len),
 178                 },
 179                 .wmi = {
 180                         .mid = 0,
 181                         .id = cpu_to_le16(cmdid),
 182                 },
 183         };
 184         struct wil6210_mbox_ring *r = &wil->mbox_ctl.tx;
 185         struct wil6210_mbox_ring_desc d_head;
 186         u32 next_head;
 187         void __iomem *dst;
 188         void __iomem *head = wmi_addr(wil, r->head);
 189         uint retry;
 190
 191         if (sizeof(cmd) + len > r->entry_size) {
 192                 wil_err(wil, "WMI size too large: %d bytes, max is %d\n",
 193                         (int)(sizeof(cmd) + len), r->entry_size);
 194                 return -ERANGE;
 195         }
 196
 197         might_sleep();
 198
 199         if (!test_bit(wil_status_fwready, &wil->status)) {
 200                 wil_err(wil, "WMI: cannot send command while FW not ready\n");
 201                 return -EAGAIN;
 202         }
 203
 204         if (!head) {
 205                 wil_err(wil, "WMI head is garbage: 0x%08x\n", r->head);
 206                 return -EINVAL;
 207         }
 208         /* read Tx head till it is not busy */
 209         for (retry = 5; retry > 0; retry--) {
 210                 wil_memcpy_fromio_32(&d_head, head, sizeof(d_head));
 211                 if (d_head.sync == 0)
 212                         break;
 213                 msleep(20);
 214         }
 215         if (d_head.sync != 0) {
 216                 wil_err(wil, "WMI head busy\n");
 217                 return -EBUSY;
 218         }
 219         /* next head */
 220         next_head = r->base + ((r->head - r->base + sizeof(d_head)) % r->size);
 221         wil_dbg_wmi(wil, "Head 0x%08x -> 0x%08x\n", r->head, next_head);
 222         /* wait till FW finish with previous command */
 223         for (retry = 5; retry > 0; retry--) {
 224                 r->tail = ioread32(wil->csr + HOST_MBOX +
 225                                    offsetof(struct wil6210_mbox_ctl, tx.tail));
 226                 if (next_head != r->tail)
 227                         break;
 228                 msleep(20);
 229         }
 230         if (next_head == r->tail) {
 231                 wil_err(wil, "WMI ring full\n");
 232                 return -EBUSY;
 233         }
 234         dst = wmi_buffer(wil, d_head.addr);
 235         if (!dst) {
 236                 wil_err(wil, "invalid WMI buffer: 0x%08x\n",
 237                         le32_to_cpu(d_head.addr));
 238                 return -EINVAL;
 239         }
 240         cmd.hdr.seq = cpu_to_le16(++wil->wmi_seq);
 241         /* set command */
 242         wil_dbg_wmi(wil, "WMI command 0x%04x [%d]\n", cmdid, len);
 243         wil_hex_dump_wmi("Cmd ", DUMP_PREFIX_OFFSET, 16, 1, &cmd,
 244                          sizeof(cmd), true);
 245         wil_hex_dump_wmi("cmd ", DUMP_PREFIX_OFFSET, 16, 1, buf,
 246                          len, true);
 247         wil_memcpy_toio_32(dst, &cmd, sizeof(cmd));
 248         wil_memcpy_toio_32(dst + sizeof(cmd), buf, len);
 249         /* mark entry as full */
 250         iowrite32(1, wil->csr + HOSTADDR(r->head) +
 251                   offsetof(struct wil6210_mbox_ring_desc, sync));
 252         /* advance next ptr */
 253         iowrite32(r->head = next_head, wil->csr + HOST_MBOX +
 254                   offsetof(struct wil6210_mbox_ctl, tx.head));
 255
 256         trace_wil6210_wmi_cmd(&cmd.wmi, buf, len);
 257
 258         /* interrupt to FW */
 259         iowrite32(SW_INT_MBOX, wil->csr + HOST_SW_INT);
 260
 261         return 0;
 262 }
 263
 264 int wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
 265 {
 266         int rc;
 267
 268         mutex_lock(&wil->wmi_mutex);
 269         rc = __wmi_send(wil, cmdid, buf, len);
 270         mutex_unlock(&wil->wmi_mutex);
 271
 272         return rc;
 273 }
 274
 275 /*=== Event handlers ===*/
 276 static void wmi_evt_ready(struct wil6210_priv *wil, int id, void *d, int len)
 277 {
 278         struct net_device *ndev = wil_to_ndev(wil);
 279         struct wireless_dev *wdev = wil->wdev;
 280         struct wmi_ready_event *evt = d;
 281         wil->fw_version = le32_to_cpu(evt->sw_version);
 282         wil->n_mids = evt->numof_additional_mids;
 283
 284         wil_info(wil, "FW ver. %d; MAC %pM; %d MID's\n", wil->fw_version,
 285                  evt->mac, wil->n_mids);
 286
 287         if (!is_valid_ether_addr(ndev->dev_addr)) {
 288                 memcpy(ndev->dev_addr, evt->mac, ETH_ALEN);
 289                 memcpy(ndev->perm_addr, evt->mac, ETH_ALEN);
 290         }
 291         snprintf(wdev->wiphy->fw_version, sizeof(wdev->wiphy->fw_version),
 292                  "%d", wil->fw_version);
 293 }
 294
 295 static void wmi_evt_fw_ready(struct wil6210_priv *wil, int id, void *d,
 296                              int len)
 297 {
 298         wil_dbg_wmi(wil, "WMI: got FW ready event\n");
 299
 300         set_bit(wil_status_fwready, &wil->status);
 301         /* reuse wmi_ready for the firmware ready indication */
 302         complete(&wil->wmi_ready);
 303 }
 304
 305 static void wmi_evt_rx_mgmt(struct wil6210_priv *wil, int id, void *d, int len)
 306 {
 307         struct wmi_rx_mgmt_packet_event *data = d;
 308         struct wiphy *wiphy = wil_to_wiphy(wil);
 309         struct ieee80211_mgmt *rx_mgmt_frame =
 310                         (struct ieee80211_mgmt *)data->payload;
 311         int ch_no = data->info.channel+1;
 312         u32 freq = ieee80211_channel_to_frequency(ch_no,
 313                         IEEE80211_BAND_60GHZ);
 314         struct ieee80211_channel *channel = ieee80211_get_channel(wiphy, freq);
 315         s32 signal = data->info.sqi;
 316         __le16 fc = rx_mgmt_frame->frame_control;
 317         u32 d_len = le32_to_cpu(data->info.len);
 318         u16 d_status = le16_to_cpu(data->info.status);
 319
 320         wil_dbg_wmi(wil, "MGMT: channel %d MCS %d SNR %d SQI %d%%\n",
 321                     data->info.channel, data->info.mcs, data->info.snr,
 322                     data->info.sqi);
 323         wil_dbg_wmi(wil, "status 0x%04x len %d fc 0x%04x\n", d_status, d_len,
 324                     le16_to_cpu(fc));
 325         wil_dbg_wmi(wil, "qid %d mid %d cid %d\n",
 326                     data->info.qid, data->info.mid, data->info.cid);
 327
 328         if (!channel) {
 329                 wil_err(wil, "Frame on unsupported channel\n");
 330                 return;
 331         }
 332
 333         if (ieee80211_is_beacon(fc) || ieee80211_is_probe_resp(fc)) {
 334                 struct cfg80211_bss *bss;
 335                 u64 tsf = le64_to_cpu(rx_mgmt_frame->u.beacon.timestamp);
 336                 u16 cap = le16_to_cpu(rx_mgmt_frame->u.beacon.capab_info);
 337                 u16 bi = le16_to_cpu(rx_mgmt_frame->u.beacon.beacon_int);
 338                 const u8 *ie_buf = rx_mgmt_frame->u.beacon.variable;
 339                 size_t ie_len = d_len - offsetof(struct ieee80211_mgmt,
 340                                                  u.beacon.variable);
 341                 wil_dbg_wmi(wil, "Capability info : 0x%04x\n", cap);
 342                 wil_dbg_wmi(wil, "TSF : 0x%016llx\n", tsf);
 343                 wil_dbg_wmi(wil, "Beacon interval : %d\n", bi);
 344                 wil_hex_dump_wmi("IE ", DUMP_PREFIX_OFFSET, 16, 1, ie_buf,
 345                                  ie_len, true);
 346
 347                 bss = cfg80211_inform_bss_frame(wiphy, channel, rx_mgmt_frame,
 348                                                 d_len, signal, GFP_KERNEL);
 349                 if (bss) {
 350                         wil_dbg_wmi(wil, "Added BSS %pM\n",
 351                                     rx_mgmt_frame->bssid);
 352                         cfg80211_put_bss(wiphy, bss);
 353                 } else {
 354                         wil_err(wil, "cfg80211_inform_bss_frame() failed\n");
 355                 }
 356         } else {
 357                 cfg80211_rx_mgmt(wil->wdev, freq, signal,
 358                                  (void *)rx_mgmt_frame, d_len, 0);
 359         }
 360 }
 361
 362 static void wmi_evt_scan_complete(struct wil6210_priv *wil, int id,
 363                                   void *d, int len)
 364 {
 365         if (wil->scan_request) {
 366                 struct wmi_scan_complete_event *data = d;
 367                 bool aborted = (data->status != WMI_SCAN_SUCCESS);
 368
 369                 wil_dbg_wmi(wil, "SCAN_COMPLETE(0x%08x)\n", data->status);
 370                 wil_dbg_misc(wil, "Complete scan_request 0x%p aborted %d\n",
 371                              wil->scan_request, aborted);
 372
 373                 del_timer_sync(&wil->scan_timer);
 374                 cfg80211_scan_done(wil->scan_request, aborted);
 375                 wil->scan_request = NULL;
 376         } else {
 377                 wil_err(wil, "SCAN_COMPLETE while not scanning\n");
 378         }
 379 }
 380
 381 static void wmi_evt_connect(struct wil6210_priv *wil, int id, void *d, int len)
 382 {
 383         struct net_device *ndev = wil_to_ndev(wil);
 384         struct wireless_dev *wdev = wil->wdev;
 385         struct wmi_connect_event *evt = d;
 386         int ch; /* channel number */
 387         struct station_info sinfo;
 388         u8 *assoc_req_ie, *assoc_resp_ie;
 389         size_t assoc_req_ielen, assoc_resp_ielen;
 390         /* capinfo(u16) + listen_interval(u16) + IEs */
 391         const size_t assoc_req_ie_offset = sizeof(u16) * 2;
 392         /* capinfo(u16) + status_code(u16) + associd(u16) + IEs */
 393         const size_t assoc_resp_ie_offset = sizeof(u16) * 3;
 394
 395         if (len < sizeof(*evt)) {
 396                 wil_err(wil, "Connect event too short : %d bytes\n", len);
 397                 return;
 398         }
 399         if (len != sizeof(*evt) + evt->beacon_ie_len + evt->assoc_req_len +
 400                    evt->assoc_resp_len) {
 401                 wil_err(wil,
 402                         "Connect event corrupted : %d != %d + %d + %d + %d\n",
 403                         len, (int)sizeof(*evt), evt->beacon_ie_len,
 404                         evt->assoc_req_len, evt->assoc_resp_len);
 405                 return;
 406         }
 407         if (evt->cid >= WIL6210_MAX_CID) {
 408                 wil_err(wil, "Connect CID invalid : %d\n", evt->cid);
 409                 return;
 410         }
 411
 412         ch = evt->channel + 1;
 413         wil_dbg_wmi(wil, "Connect %pM channel [%d] cid %d\n",
 414                     evt->bssid, ch, evt->cid);
 415         wil_hex_dump_wmi("connect AI : ", DUMP_PREFIX_OFFSET, 16, 1,
 416                          evt->assoc_info, len - sizeof(*evt), true);
 417
 418         /* figure out IE's */
 419         assoc_req_ie = &evt->assoc_info[evt->beacon_ie_len +
 420                                         assoc_req_ie_offset];
 421         assoc_req_ielen = evt->assoc_req_len - assoc_req_ie_offset;
 422         if (evt->assoc_req_len <= assoc_req_ie_offset) {
 423                 assoc_req_ie = NULL;
 424                 assoc_req_ielen = 0;
 425         }
 426
 427         assoc_resp_ie = &evt->assoc_info[evt->beacon_ie_len +
 428                                          evt->assoc_req_len +
 429                                          assoc_resp_ie_offset];
 430         assoc_resp_ielen = evt->assoc_resp_len - assoc_resp_ie_offset;
 431         if (evt->assoc_resp_len <= assoc_resp_ie_offset) {
 432                 assoc_resp_ie = NULL;
 433                 assoc_resp_ielen = 0;
 434         }
 435
 436         if ((wdev->iftype == NL80211_IFTYPE_STATION) ||
 437             (wdev->iftype == NL80211_IFTYPE_P2P_CLIENT)) {
 438                 if (!test_bit(wil_status_fwconnecting, &wil->status)) {
 439                         wil_err(wil, "Not in connecting state\n");
 440                         return;
 441                 }
 442                 del_timer_sync(&wil->connect_timer);
 443                 cfg80211_connect_result(ndev, evt->bssid,
 444                                         assoc_req_ie, assoc_req_ielen,
 445                                         assoc_resp_ie, assoc_resp_ielen,
 446                                         WLAN_STATUS_SUCCESS, GFP_KERNEL);
 447
 448         } else if ((wdev->iftype == NL80211_IFTYPE_AP) ||
 449                    (wdev->iftype == NL80211_IFTYPE_P2P_GO)) {
 450                 memset(&sinfo, 0, sizeof(sinfo));
 451
 452                 sinfo.generation = wil->sinfo_gen++;
 453
 454                 if (assoc_req_ie) {
 455                         sinfo.assoc_req_ies = assoc_req_ie;
 456                         sinfo.assoc_req_ies_len = assoc_req_ielen;
 457                         sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
 458                 }
 459
 460                 cfg80211_new_sta(ndev, evt->bssid, &sinfo, GFP_KERNEL);
 461         }
 462         clear_bit(wil_status_fwconnecting, &wil->status);
 463         set_bit(wil_status_fwconnected, &wil->status);
 464
 465         /* FIXME FW can transmit only ucast frames to peer */
 466         /* FIXME real ring_id instead of hard coded 0 */
 467         memcpy(wil->sta[evt->cid].addr, evt->bssid, ETH_ALEN);
 468         wil->sta[evt->cid].status = wil_sta_conn_pending;
 469
 470         wil->pending_connect_cid = evt->cid;
 471         queue_work(wil->wmi_wq_conn, &wil->connect_worker);
 472 }
 473
 474 static void wmi_evt_disconnect(struct wil6210_priv *wil, int id,
 475                                void *d, int len)
 476 {
 477         struct wmi_disconnect_event *evt = d;
 478
 479         wil_dbg_wmi(wil, "Disconnect %pM reason %d proto %d wmi\n",
 480                     evt->bssid,
 481                     evt->protocol_reason_status, evt->disconnect_reason);
 482
 483         wil->sinfo_gen++;
 484
 485         mutex_lock(&wil->mutex);
 486         wil6210_disconnect(wil, evt->bssid);
 487         mutex_unlock(&wil->mutex);
 488 }
 489
 490 /*
 491  * Firmware reports EAPOL frame using WME event.
 492  * Reconstruct Ethernet frame and deliver it via normal Rx
 493  */
 494 static void wmi_evt_eapol_rx(struct wil6210_priv *wil, int id,
 495                              void *d, int len)
 496 {
 497         struct net_device *ndev = wil_to_ndev(wil);
 498         struct wmi_eapol_rx_event *evt = d;
 499         u16 eapol_len = le16_to_cpu(evt->eapol_len);
 500         int sz = eapol_len + ETH_HLEN;
 501         struct sk_buff *skb;
 502         struct ethhdr *eth;
 503         int cid;
 504         struct wil_net_stats *stats = NULL;
 505
 506         wil_dbg_wmi(wil, "EAPOL len %d from %pM\n", eapol_len,
 507                     evt->src_mac);
 508
 509         cid = wil_find_cid(wil, evt->src_mac);
 510         if (cid >= 0)
 511                 stats = &wil->sta[cid].stats;
 512
 513         if (eapol_len > 196) { /* TODO: revisit size limit */
 514                 wil_err(wil, "EAPOL too large\n");
 515                 return;
 516         }
 517
 518         skb = alloc_skb(sz, GFP_KERNEL);
 519         if (!skb) {
 520                 wil_err(wil, "Failed to allocate skb\n");
 521                 return;
 522         }
 523
 524         eth = (struct ethhdr *)skb_put(skb, ETH_HLEN);
 525         memcpy(eth->h_dest, ndev->dev_addr, ETH_ALEN);
 526         memcpy(eth->h_source, evt->src_mac, ETH_ALEN);
 527         eth->h_proto = cpu_to_be16(ETH_P_PAE);
 528         memcpy(skb_put(skb, eapol_len), evt->eapol, eapol_len);
 529         skb->protocol = eth_type_trans(skb, ndev);
 530         if (likely(netif_rx_ni(skb) == NET_RX_SUCCESS)) {
 531                 ndev->stats.rx_packets++;
 532                 ndev->stats.rx_bytes += sz;
 533                 if (stats) {
 534                         stats->rx_packets++;
 535                         stats->rx_bytes += sz;
 536                 }
 537         } else {
 538                 ndev->stats.rx_dropped++;
 539                 if (stats)
 540                         stats->rx_dropped++;
 541         }
 542 }
 543
 544 static void wmi_evt_linkup(struct wil6210_priv *wil, int id, void *d, int len)
 545 {
 546         struct net_device *ndev = wil_to_ndev(wil);
 547         struct wmi_data_port_open_event *evt = d;
 548         u8 cid = evt->cid;
 549
 550         wil_dbg_wmi(wil, "Link UP for CID %d\n", cid);
 551
 552         if (cid >= ARRAY_SIZE(wil->sta)) {
 553                 wil_err(wil, "Link UP for invalid CID %d\n", cid);
 554                 return;
 555         }
 556
 557         wil->sta[cid].data_port_open = true;
 558         netif_carrier_on(ndev);
 559 }
 560
 561 static void wmi_evt_linkdown(struct wil6210_priv *wil, int id, void *d, int len)
 562 {
 563         struct net_device *ndev = wil_to_ndev(wil);
 564         struct wmi_wbe_link_down_event *evt = d;
 565         u8 cid = evt->cid;
 566
 567         wil_dbg_wmi(wil, "Link DOWN for CID %d, reason %d\n",
 568                     cid, le32_to_cpu(evt->reason));
 569
 570         if (cid >= ARRAY_SIZE(wil->sta)) {
 571                 wil_err(wil, "Link DOWN for invalid CID %d\n", cid);
 572                 return;
 573         }
 574
 575         wil->sta[cid].data_port_open = false;
 576         netif_carrier_off(ndev);
 577 }
 578
 579 static void wmi_evt_ba_status(struct wil6210_priv *wil, int id, void *d,
 580                               int len)
 581 {
 582         struct wmi_vring_ba_status_event *evt = d;
 583         struct wil_sta_info *sta;
 584         uint i, cid;
 585
 586         /* TODO: use Rx BA status, not Tx one */
 587
 588         wil_dbg_wmi(wil, "BACK[%d] %s {%d} timeout %d\n",
 589                     evt->ringid,
 590                     evt->status == WMI_BA_AGREED ? "OK" : "N/A",
 591                     evt->agg_wsize, __le16_to_cpu(evt->ba_timeout));
 592
 593         if (evt->ringid >= WIL6210_MAX_TX_RINGS) {
 594                 wil_err(wil, "invalid ring id %d\n", evt->ringid);
 595                 return;
 596         }
 597
 598         cid = wil->vring2cid_tid[evt->ringid][0];
 599         if (cid >= WIL6210_MAX_CID) {
 600                 wil_err(wil, "invalid CID %d for vring %d\n", cid, evt->ringid);
 601                 return;
 602         }
 603
 604         sta = &wil->sta[cid];
 605         if (sta->status == wil_sta_unused) {
 606                 wil_err(wil, "CID %d unused\n", cid);
 607                 return;
 608         }
 609
 610         wil_dbg_wmi(wil, "BACK for CID %d %pM\n", cid, sta->addr);
 611         for (i = 0; i < WIL_STA_TID_NUM; i++) {
 612                 struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
 613                 sta->tid_rx[i] = NULL;
 614                 wil_tid_ampdu_rx_free(wil, r);
 615                 if ((evt->status == WMI_BA_AGREED) && evt->agg_wsize)
 616                         sta->tid_rx[i] = wil_tid_ampdu_rx_alloc(wil,
 617                                                 evt->agg_wsize, 0);
 618         }
 619 }
 620
 621 static const struct {
 622         int eventid;
 623         void (*handler)(struct wil6210_priv *wil, int eventid,
 624                         void *data, int data_len);
 625 } wmi_evt_handlers[] = {
 626         {WMI_READY_EVENTID,             wmi_evt_ready},
 627         {WMI_FW_READY_EVENTID,          wmi_evt_fw_ready},
 628         {WMI_RX_MGMT_PACKET_EVENTID,    wmi_evt_rx_mgmt},
 629         {WMI_SCAN_COMPLETE_EVENTID,     wmi_evt_scan_complete},
 630         {WMI_CONNECT_EVENTID,           wmi_evt_connect},
 631         {WMI_DISCONNECT_EVENTID,        wmi_evt_disconnect},
 632         {WMI_EAPOL_RX_EVENTID,          wmi_evt_eapol_rx},
 633         {WMI_DATA_PORT_OPEN_EVENTID,    wmi_evt_linkup},
 634         {WMI_WBE_LINKDOWN_EVENTID,      wmi_evt_linkdown},
 635         {WMI_BA_STATUS_EVENTID,         wmi_evt_ba_status},
 636 };
 637
 638 /*
 639  * Run in IRQ context
 640  * Extract WMI command from mailbox. Queue it to the @wil->pending_wmi_ev
 641  * that will be eventually handled by the @wmi_event_worker in the thread
 642  * context of thread "wil6210_wmi"
 643  */
 644 void wmi_recv_cmd(struct wil6210_priv *wil)
 645 {
 646         struct wil6210_mbox_ring_desc d_tail;
 647         struct wil6210_mbox_hdr hdr;
 648         struct wil6210_mbox_ring *r = &wil->mbox_ctl.rx;
 649         struct pending_wmi_event *evt;
 650         u8 *cmd;
 651         void __iomem *src;
 652         ulong flags;
 653         unsigned n;
 654
 655         if (!test_bit(wil_status_reset_done, &wil->status)) {
 656                 wil_err(wil, "Reset not completed\n");
 657                 return;
 658         }
 659
 660         for (n = 0;; n++) {
 661                 u16 len;
 662                 bool q;
 663
 664                 r->head = ioread32(wil->csr + HOST_MBOX +
 665                                    offsetof(struct wil6210_mbox_ctl, rx.head));
 666                 if (r->tail == r->head)
 667                         break;
 668
 669                 wil_dbg_wmi(wil, "Mbox head %08x tail %08x\n",
 670                             r->head, r->tail);
 671                 /* read cmd descriptor from tail */
 672                 wil_memcpy_fromio_32(&d_tail, wil->csr + HOSTADDR(r->tail),
 673                                      sizeof(struct wil6210_mbox_ring_desc));
 674                 if (d_tail.sync == 0) {
 675                         wil_err(wil, "Mbox evt not owned by FW?\n");
 676                         break;
 677                 }
 678
 679                 /* read cmd header from descriptor */
 680                 if (0 != wmi_read_hdr(wil, d_tail.addr, &hdr)) {
 681                         wil_err(wil, "Mbox evt at 0x%08x?\n",
 682                                 le32_to_cpu(d_tail.addr));
 683                         break;
 684                 }
 685                 len = le16_to_cpu(hdr.len);
 686                 wil_dbg_wmi(wil, "Mbox evt %04x %04x %04x %02x\n",
 687                             le16_to_cpu(hdr.seq), len, le16_to_cpu(hdr.type),
 688                             hdr.flags);
 689
 690                 /* read cmd buffer from descriptor */
 691                 src = wmi_buffer(wil, d_tail.addr) +
 692                       sizeof(struct wil6210_mbox_hdr);
 693                 evt = kmalloc(ALIGN(offsetof(struct pending_wmi_event,
 694                                              event.wmi) + len, 4),
 695                               GFP_KERNEL);
 696                 if (!evt)
 697                         break;
 698
 699                 evt->event.hdr = hdr;
 700                 cmd = (void *)&evt->event.wmi;
 701                 wil_memcpy_fromio_32(cmd, src, len);
 702                 /* mark entry as empty */
 703                 iowrite32(0, wil->csr + HOSTADDR(r->tail) +
 704                           offsetof(struct wil6210_mbox_ring_desc, sync));
 705                 /* indicate */
 706                 if ((hdr.type == WIL_MBOX_HDR_TYPE_WMI) &&
 707                     (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 708                         struct wil6210_mbox_hdr_wmi *wmi = &evt->event.wmi;
 709                         u16 id = le16_to_cpu(wmi->id);
 710                         u32 tstamp = le32_to_cpu(wmi->timestamp);
 711                         wil_dbg_wmi(wil, "WMI event 0x%04x MID %d @%d msec\n",
 712                                     id, wmi->mid, tstamp);
 713                         trace_wil6210_wmi_event(wmi, &wmi[1],
 714                                                 len - sizeof(*wmi));
 715                 }
 716                 wil_hex_dump_wmi("evt ", DUMP_PREFIX_OFFSET, 16, 1,
 717                                  &evt->event.hdr, sizeof(hdr) + len, true);
 718
 719                 /* advance tail */
 720                 r->tail = r->base + ((r->tail - r->base +
 721                           sizeof(struct wil6210_mbox_ring_desc)) % r->size);
 722                 iowrite32(r->tail, wil->csr + HOST_MBOX +
 723                           offsetof(struct wil6210_mbox_ctl, rx.tail));
 724
 725                 /* add to the pending list */
 726                 spin_lock_irqsave(&wil->wmi_ev_lock, flags);
 727                 list_add_tail(&evt->list, &wil->pending_wmi_ev);
 728                 spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
 729                 q = queue_work(wil->wmi_wq, &wil->wmi_event_worker);
 730                 wil_dbg_wmi(wil, "queue_work -> %d\n", q);
 731         }
 732         /* normally, 1 event per IRQ should be processed */
 733         wil_dbg_wmi(wil, "%s -> %d events queued\n", __func__, n);
 734 }
 735
 736 int wmi_call(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len,
 737              u16 reply_id, void *reply, u8 reply_size, int to_msec)
 738 {
 739         int rc;
 740         int remain;
 741
 742         mutex_lock(&wil->wmi_mutex);
 743
 744         rc = __wmi_send(wil, cmdid, buf, len);
 745         if (rc)
 746                 goto out;
 747
 748         wil->reply_id = reply_id;
 749         wil->reply_buf = reply;
 750         wil->reply_size = reply_size;
 751         remain = wait_for_completion_timeout(&wil->wmi_ready,
 752                         msecs_to_jiffies(to_msec));
 753         if (0 == remain) {
 754                 wil_err(wil, "wmi_call(0x%04x->0x%04x) timeout %d msec\n",
 755                         cmdid, reply_id, to_msec);
 756                 rc = -ETIME;
 757         } else {
 758                 wil_dbg_wmi(wil,
 759                             "wmi_call(0x%04x->0x%04x) completed in %d msec\n",
 760                             cmdid, reply_id,
 761                             to_msec - jiffies_to_msecs(remain));
 762         }
 763         wil->reply_id = 0;
 764         wil->reply_buf = NULL;
 765         wil->reply_size = 0;
 766  out:
 767         mutex_unlock(&wil->wmi_mutex);
 768
 769         return rc;
 770 }
 771
 772 int wmi_echo(struct wil6210_priv *wil)
 773 {
 774         struct wmi_echo_cmd cmd = {
 775                 .value = cpu_to_le32(0x12345678),
 776         };
 777
 778         return wmi_call(wil, WMI_ECHO_CMDID, &cmd, sizeof(cmd),
 779                          WMI_ECHO_RSP_EVENTID, NULL, 0, 20);
 780 }
 781
 782 int wmi_set_mac_address(struct wil6210_priv *wil, void *addr)
 783 {
 784         struct wmi_set_mac_address_cmd cmd;
 785
 786         memcpy(cmd.mac, addr, ETH_ALEN);
 787
 788         wil_dbg_wmi(wil, "Set MAC %pM\n", addr);
 789
 790         return wmi_send(wil, WMI_SET_MAC_ADDRESS_CMDID, &cmd, sizeof(cmd));
 791 }
 792
 793 int wmi_pcp_start(struct wil6210_priv *wil, int bi, u8 wmi_nettype, u8 chan)
 794 {
 795         int rc;
 796
 797         struct wmi_pcp_start_cmd cmd = {
 798                 .bcon_interval = cpu_to_le16(bi),
 799                 .network_type = wmi_nettype,
 800                 .disable_sec_offload = 1,
 801                 .channel = chan - 1,
 802                 .pcp_max_assoc_sta = max_assoc_sta,
 803         };
 804         struct {
 805                 struct wil6210_mbox_hdr_wmi wmi;
 806                 struct wmi_pcp_started_event evt;
 807         } __packed reply;
 808
 809         if (!wil->secure_pcp)
 810                 cmd.disable_sec = 1;
 811
 812         if ((cmd.pcp_max_assoc_sta > WIL6210_MAX_CID) ||
 813             (cmd.pcp_max_assoc_sta <= 0)) {
 814                 wil_info(wil,
 815                          "Requested connection limit %u, valid values are 1 - %d. Setting to %d\n",
 816                          max_assoc_sta, WIL6210_MAX_CID, WIL6210_MAX_CID);
 817                 cmd.pcp_max_assoc_sta = WIL6210_MAX_CID;
 818         }
 819
 820         /*
 821          * Processing time may be huge, in case of secure AP it takes about
 822          * 3500ms for FW to start AP
 823          */
 824         rc = wmi_call(wil, WMI_PCP_START_CMDID, &cmd, sizeof(cmd),
 825                       WMI_PCP_STARTED_EVENTID, &reply, sizeof(reply), 5000);
 826         if (rc)
 827                 return rc;
 828
 829         if (reply.evt.status != WMI_FW_STATUS_SUCCESS)
 830                 rc = -EINVAL;
 831
 832         return rc;
 833 }
 834
 835 int wmi_pcp_stop(struct wil6210_priv *wil)
 836 {
 837         return wmi_call(wil, WMI_PCP_STOP_CMDID, NULL, 0,
 838                         WMI_PCP_STOPPED_EVENTID, NULL, 0, 20);
 839 }
 840
 841 int wmi_set_ssid(struct wil6210_priv *wil, u8 ssid_len, const void *ssid)
 842 {
 843         struct wmi_set_ssid_cmd cmd = {
 844                 .ssid_len = cpu_to_le32(ssid_len),
 845         };
 846
 847         if (ssid_len > sizeof(cmd.ssid))
 848                 return -EINVAL;
 849
 850         memcpy(cmd.ssid, ssid, ssid_len);
 851
 852         return wmi_send(wil, WMI_SET_SSID_CMDID, &cmd, sizeof(cmd));
 853 }
 854
 855 int wmi_get_ssid(struct wil6210_priv *wil, u8 *ssid_len, void *ssid)
 856 {
 857         int rc;
 858         struct {
 859                 struct wil6210_mbox_hdr_wmi wmi;
 860                 struct wmi_set_ssid_cmd cmd;
 861         } __packed reply;
 862         int len; /* reply.cmd.ssid_len in CPU order */
 863
 864         rc = wmi_call(wil, WMI_GET_SSID_CMDID, NULL, 0, WMI_GET_SSID_EVENTID,
 865                       &reply, sizeof(reply), 20);
 866         if (rc)
 867                 return rc;
 868
 869         len = le32_to_cpu(reply.cmd.ssid_len);
 870         if (len > sizeof(reply.cmd.ssid))
 871                 return -EINVAL;
 872
 873         *ssid_len = len;
 874         memcpy(ssid, reply.cmd.ssid, len);
 875
 876         return 0;
 877 }
 878
 879 int wmi_set_channel(struct wil6210_priv *wil, int channel)
 880 {
 881         struct wmi_set_pcp_channel_cmd cmd = {
 882                 .channel = channel - 1,
 883         };
 884
 885         return wmi_send(wil, WMI_SET_PCP_CHANNEL_CMDID, &cmd, sizeof(cmd));
 886 }
 887
 888 int wmi_get_channel(struct wil6210_priv *wil, int *channel)
 889 {
 890         int rc;
 891         struct {
 892                 struct wil6210_mbox_hdr_wmi wmi;
 893                 struct wmi_set_pcp_channel_cmd cmd;
 894         } __packed reply;
 895
 896         rc = wmi_call(wil, WMI_GET_PCP_CHANNEL_CMDID, NULL, 0,
 897                       WMI_GET_PCP_CHANNEL_EVENTID, &reply, sizeof(reply), 20);
 898         if (rc)
 899                 return rc;
 900
 901         if (reply.cmd.channel > 3)
 902                 return -EINVAL;
 903
 904         *channel = reply.cmd.channel + 1;
 905
 906         return 0;
 907 }
 908
 909 int wmi_p2p_cfg(struct wil6210_priv *wil, int channel)
 910 {
 911         struct wmi_p2p_cfg_cmd cmd = {
 912                 .discovery_mode = WMI_DISCOVERY_MODE_NON_OFFLOAD,
 913                 .channel = channel - 1,
 914         };
 915
 916         return wmi_send(wil, WMI_P2P_CFG_CMDID, &cmd, sizeof(cmd));
 917 }
 918
 919 int wmi_del_cipher_key(struct wil6210_priv *wil, u8 key_index,
 920                        const void *mac_addr)
 921 {
 922         struct wmi_delete_cipher_key_cmd cmd = {
 923                 .key_index = key_index,
 924         };
 925
 926         if (mac_addr)
 927                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 928
 929         return wmi_send(wil, WMI_DELETE_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 930 }
 931
 932 int wmi_add_cipher_key(struct wil6210_priv *wil, u8 key_index,
 933                        const void *mac_addr, int key_len, const void *key)
 934 {
 935         struct wmi_add_cipher_key_cmd cmd = {
 936                 .key_index = key_index,
 937                 .key_usage = WMI_KEY_USE_PAIRWISE,
 938                 .key_len = key_len,
 939         };
 940
 941         if (!key || (key_len > sizeof(cmd.key)))
 942                 return -EINVAL;
 943
 944         memcpy(cmd.key, key, key_len);
 945         if (mac_addr)
 946                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 947
 948         return wmi_send(wil, WMI_ADD_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 949 }
 950
 951 int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie)
 952 {
 953         int rc;
 954         u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len;
 955         struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL);
 956         if (!cmd)
 957                 return -ENOMEM;
 958
 959         cmd->mgmt_frm_type = type;
 960         /* BUG: FW API define ieLen as u8. Will fix FW */
 961         cmd->ie_len = cpu_to_le16(ie_len);
 962         memcpy(cmd->ie_info, ie, ie_len);
 963         rc = wmi_send(wil, WMI_SET_APPIE_CMDID, cmd, len);
 964         kfree(cmd);
 965
 966         return rc;
 967 }
 968
 969 /**
 970  * wmi_rxon - turn radio on/off
 971  * @on:         turn on if true, off otherwise
 972  *
 973  * Only switch radio. Channel should be set separately.
 974  * No timeout for rxon - radio turned on forever unless some other call
 975  * turns it off
 976  */
 977 int wmi_rxon(struct wil6210_priv *wil, bool on)
 978 {
 979         int rc;
 980         struct {
 981                 struct wil6210_mbox_hdr_wmi wmi;
 982                 struct wmi_listen_started_event evt;
 983         } __packed reply;
 984
 985         wil_info(wil, "%s(%s)\n", __func__, on ? "on" : "off");
 986
 987         if (on) {
 988                 rc = wmi_call(wil, WMI_START_LISTEN_CMDID, NULL, 0,
 989                               WMI_LISTEN_STARTED_EVENTID,
 990                               &reply, sizeof(reply), 100);
 991                 if ((rc == 0) && (reply.evt.status != WMI_FW_STATUS_SUCCESS))
 992                         rc = -EINVAL;
 993         } else {
 994                 rc = wmi_call(wil, WMI_DISCOVERY_STOP_CMDID, NULL, 0,
 995                               WMI_DISCOVERY_STOPPED_EVENTID, NULL, 0, 20);
 996         }
 997
 998         return rc;
 999 }
1000
1001 int wmi_rx_chain_add(struct wil6210_priv *wil, struct vring *vring)
1002 {
1003         struct wireless_dev *wdev = wil->wdev;
1004         struct net_device *ndev = wil_to_ndev(wil);
1005         struct wmi_cfg_rx_chain_cmd cmd = {
1006                 .action = WMI_RX_CHAIN_ADD,
1007                 .rx_sw_ring = {
1008                         .max_mpdu_size = cpu_to_le16(RX_BUF_LEN),
1009                         .ring_mem_base = cpu_to_le64(vring->pa),
1010                         .ring_size = cpu_to_le16(vring->size),
1011                 },
1012                 .mid = 0, /* TODO - what is it? */
1013                 .decap_trans_type = WMI_DECAP_TYPE_802_3,
1014                 .reorder_type = WMI_RX_SW_REORDER,
1015         };
1016         struct {
1017                 struct wil6210_mbox_hdr_wmi wmi;
1018                 struct wmi_cfg_rx_chain_done_event evt;
1019         } __packed evt;
1020         int rc;
1021
1022         if (wdev->iftype == NL80211_IFTYPE_MONITOR) {
1023                 struct ieee80211_channel *ch = wdev->preset_chandef.chan;
1024
1025                 cmd.sniffer_cfg.mode = cpu_to_le32(WMI_SNIFFER_ON);
1026                 if (ch)
1027                         cmd.sniffer_cfg.channel = ch->hw_value - 1;
1028                 cmd.sniffer_cfg.phy_info_mode =
1029                         cpu_to_le32(ndev->type == ARPHRD_IEEE80211_RADIOTAP);
1030                 cmd.sniffer_cfg.phy_support =
1031                         cpu_to_le32((wil->monitor_flags & MONITOR_FLAG_CONTROL)
1032                                     ? WMI_SNIFFER_CP : WMI_SNIFFER_DP);
1033         } else {
1034                 /* Initialize offload (in non-sniffer mode).
1035                  * Linux IP stack always calculates IP checksum
1036                  * HW always calculate TCP/UDP checksum
1037                  */
1038                 cmd.l3_l4_ctrl |= (1 << L3_L4_CTRL_TCPIP_CHECKSUM_EN_POS);
1039         }
1040         /* typical time for secure PCP is 840ms */
1041         rc = wmi_call(wil, WMI_CFG_RX_CHAIN_CMDID, &cmd, sizeof(cmd),
1042                       WMI_CFG_RX_CHAIN_DONE_EVENTID, &evt, sizeof(evt), 2000);
1043         if (rc)
1044                 return rc;
1045
1046         vring->hwtail = le32_to_cpu(evt.evt.rx_ring_tail_ptr);
1047
1048         wil_dbg_misc(wil, "Rx init: status %d tail 0x%08x\n",
1049                      le32_to_cpu(evt.evt.status), vring->hwtail);
1050
1051         if (le32_to_cpu(evt.evt.status) != WMI_CFG_RX_CHAIN_SUCCESS)
1052                 rc = -EINVAL;
1053
1054         return rc;
1055 }
1056
1057 int wmi_get_temperature(struct wil6210_priv *wil, u32 *t_m, u32 *t_r)
1058 {
1059         int rc;
1060         struct wmi_temp_sense_cmd cmd = {
1061                 .measure_marlon_m_en = cpu_to_le32(!!t_m),
1062                 .measure_marlon_r_en = cpu_to_le32(!!t_r),
1063         };
1064         struct {
1065                 struct wil6210_mbox_hdr_wmi wmi;
1066                 struct wmi_temp_sense_done_event evt;
1067         } __packed reply;
1068
1069         rc = wmi_call(wil, WMI_TEMP_SENSE_CMDID, &cmd, sizeof(cmd),
1070                       WMI_TEMP_SENSE_DONE_EVENTID, &reply, sizeof(reply), 100);
1071         if (rc)
1072                 return rc;
1073
1074         if (t_m)
1075                 *t_m = le32_to_cpu(reply.evt.marlon_m_t1000);
1076         if (t_r)
1077                 *t_r = le32_to_cpu(reply.evt.marlon_r_t1000);
1078
1079         return 0;
1080 }
1081
1082 int wmi_disconnect_sta(struct wil6210_priv *wil, const u8 *mac, u16 reason)
1083 {
1084         struct wmi_disconnect_sta_cmd cmd = {
1085                 .disconnect_reason = cpu_to_le16(reason),
1086         };
1087         memcpy(cmd.dst_mac, mac, ETH_ALEN);
1088
1089         wil_dbg_wmi(wil, "%s(%pM, reason %d)\n", __func__, mac, reason);
1090
1091         return wmi_send(wil, WMI_DISCONNECT_STA_CMDID, &cmd, sizeof(cmd));
1092 }
1093
1094 void wmi_event_flush(struct wil6210_priv *wil)
1095 {
1096         struct pending_wmi_event *evt, *t;
1097
1098         wil_dbg_wmi(wil, "%s()\n", __func__);
1099
1100         list_for_each_entry_safe(evt, t, &wil->pending_wmi_ev, list) {
1101                 list_del(&evt->list);
1102                 kfree(evt);
1103         }
1104 }
1105
1106 static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id,
1107                                  void *d, int len)
1108 {
1109         uint i;
1110
1111         for (i = 0; i < ARRAY_SIZE(wmi_evt_handlers); i++) {
1112                 if (wmi_evt_handlers[i].eventid == id) {
1113                         wmi_evt_handlers[i].handler(wil, id, d, len);
1114                         return true;
1115                 }
1116         }
1117
1118         return false;
1119 }
1120
1121 static void wmi_event_handle(struct wil6210_priv *wil,
1122                              struct wil6210_mbox_hdr *hdr)
1123 {
1124         u16 len = le16_to_cpu(hdr->len);
1125
1126         if ((hdr->type == WIL_MBOX_HDR_TYPE_WMI) &&
1127             (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
1128                 struct wil6210_mbox_hdr_wmi *wmi = (void *)(&hdr[1]);
1129                 void *evt_data = (void *)(&wmi[1]);
1130                 u16 id = le16_to_cpu(wmi->id);
1131                 /* check if someone waits for this event */
1132                 if (wil->reply_id && wil->reply_id == id) {
1133                         if (wil->reply_buf) {
1134                                 memcpy(wil->reply_buf, wmi,
1135                                        min(len, wil->reply_size));
1136                         } else {
1137                                 wmi_evt_call_handler(wil, id, evt_data,
1138                                                      len - sizeof(*wmi));
1139                         }
1140                         wil_dbg_wmi(wil, "Complete WMI 0x%04x\n", id);
1141                         complete(&wil->wmi_ready);
1142                         return;
1143                 }
1144                 /* unsolicited event */
1145                 /* search for handler */
1146                 if (!wmi_evt_call_handler(wil, id, evt_data,
1147                                           len - sizeof(*wmi))) {
1148                         wil_err(wil, "Unhandled event 0x%04x\n", id);
1149                 }
1150         } else {
1151                 wil_err(wil, "Unknown event type\n");
1152                 print_hex_dump(KERN_ERR, "evt?? ", DUMP_PREFIX_OFFSET, 16, 1,
1153                                hdr, sizeof(*hdr) + len, true);
1154         }
1155 }
1156
1157 /*
1158  * Retrieve next WMI event from the pending list
1159  */
1160 static struct list_head *next_wmi_ev(struct wil6210_priv *wil)
1161 {
1162         ulong flags;
1163         struct list_head *ret = NULL;
1164
1165         spin_lock_irqsave(&wil->wmi_ev_lock, flags);
1166
1167         if (!list_empty(&wil->pending_wmi_ev)) {
1168                 ret = wil->pending_wmi_ev.next;
1169                 list_del(ret);
1170         }
1171
1172         spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
1173
1174         return ret;
1175 }
1176
1177 /*
1178  * Handler for the WMI events
1179  */
1180 void wmi_event_worker(struct work_struct *work)
1181 {
1182         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
1183                                                  wmi_event_worker);
1184         struct pending_wmi_event *evt;
1185         struct list_head *lh;
1186
1187         while ((lh = next_wmi_ev(wil)) != NULL) {
1188                 evt = list_entry(lh, struct pending_wmi_event, list);
1189                 wmi_event_handle(wil, &evt->event.hdr);
1190                 kfree(evt);
1191         }
1192 }