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

   1 /*
   2  * Copyright (c) 2012 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/pci.h>
  18 #include <linux/io.h>
  19 #include <linux/list.h>
  20 #include <linux/etherdevice.h>
  21
  22 #include "wil6210.h"
  23 #include "wmi.h"
  24
  25 /**
  26  * WMI event receiving - theory of operations
  27  *
  28  * When firmware about to report WMI event, it fills memory area
  29  * in the mailbox and raises misc. IRQ. Thread interrupt handler invoked for
  30  * the misc IRQ, function @wmi_recv_cmd called by thread IRQ handler.
  31  *
  32  * @wmi_recv_cmd reads event, allocates memory chunk  and attaches it to the
  33  * event list @wil->pending_wmi_ev. Then, work queue @wil->wmi_wq wakes up
  34  * and handles events within the @wmi_event_worker. Every event get detached
  35  * from list, processed and deleted.
  36  *
  37  * Purpose for this mechanism is to release IRQ thread; otherwise,
  38  * if WMI event handling involves another WMI command flow, this 2-nd flow
  39  * won't be completed because of blocked IRQ thread.
  40  */
  41
  42 /**
  43  * Addressing - theory of operations
  44  *
  45  * There are several buses present on the WIL6210 card.
  46  * Same memory areas are visible at different address on
  47  * the different busses. There are 3 main bus masters:
  48  *  - MAC CPU (ucode)
  49  *  - User CPU (firmware)
  50  *  - AHB (host)
  51  *
  52  * On the PCI bus, there is one BAR (BAR0) of 2Mb size, exposing
  53  * AHB addresses starting from 0x880000
  54  *
  55  * Internally, firmware uses addresses that allows faster access but
  56  * are invisible from the host. To read from these addresses, alternative
  57  * AHB address must be used.
  58  *
  59  * Memory mapping
  60  * Linker address         PCI/Host address
  61  *                        0x880000 .. 0xa80000  2Mb BAR0
  62  * 0x800000 .. 0x807000   0x900000 .. 0x907000  28k DCCM
  63  * 0x840000 .. 0x857000   0x908000 .. 0x91f000  92k PERIPH
  64  */
  65
  66 /**
  67  * @fw_mapping provides memory remapping table
  68  */
  69 static const struct {
  70         u32 from; /* linker address - from, inclusive */
  71         u32 to;   /* linker address - to, exclusive */
  72         u32 host; /* PCI/Host address - BAR0 + 0x880000 */
  73 } fw_mapping[] = {
  74         {0x000000, 0x040000, 0x8c0000}, /* FW code RAM 256k */
  75         {0x800000, 0x808000, 0x900000}, /* FW data RAM 32k */
  76         {0x840000, 0x860000, 0x908000}, /* peripheral data RAM 128k/96k used */
  77         {0x880000, 0x88a000, 0x880000}, /* various RGF */
  78         {0x8c0000, 0x932000, 0x8c0000}, /* trivial mapping for upper area */
  79         /*
  80          * 920000..930000 ucode code RAM
  81          * 930000..932000 ucode data RAM
  82          */
  83 };
  84
  85 /**
  86  * return AHB address for given firmware/ucode internal (linker) address
  87  * @x - internal address
  88  * If address have no valid AHB mapping, return 0
  89  */
  90 static u32 wmi_addr_remap(u32 x)
  91 {
  92         uint i;
  93
  94         for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
  95                 if ((x >= fw_mapping[i].from) && (x < fw_mapping[i].to))
  96                         return x + fw_mapping[i].host - fw_mapping[i].from;
  97         }
  98
  99         return 0;
 100 }
 101
 102 /**
 103  * Check address validity for WMI buffer; remap if needed
 104  * @ptr - internal (linker) fw/ucode address
 105  *
 106  * Valid buffer should be DWORD aligned
 107  *
 108  * return address for accessing buffer from the host;
 109  * if buffer is not valid, return NULL.
 110  */
 111 void __iomem *wmi_buffer(struct wil6210_priv *wil, __le32 ptr_)
 112 {
 113         u32 off;
 114         u32 ptr = le32_to_cpu(ptr_);
 115
 116         if (ptr % 4)
 117                 return NULL;
 118
 119         ptr = wmi_addr_remap(ptr);
 120         if (ptr < WIL6210_FW_HOST_OFF)
 121                 return NULL;
 122
 123         off = HOSTADDR(ptr);
 124         if (off > WIL6210_MEM_SIZE - 4)
 125                 return NULL;
 126
 127         return wil->csr + off;
 128 }
 129
 130 /**
 131  * Check address validity
 132  */
 133 void __iomem *wmi_addr(struct wil6210_priv *wil, u32 ptr)
 134 {
 135         u32 off;
 136
 137         if (ptr % 4)
 138                 return NULL;
 139
 140         if (ptr < WIL6210_FW_HOST_OFF)
 141                 return NULL;
 142
 143         off = HOSTADDR(ptr);
 144         if (off > WIL6210_MEM_SIZE - 4)
 145                 return NULL;
 146
 147         return wil->csr + off;
 148 }
 149
 150 int wmi_read_hdr(struct wil6210_priv *wil, __le32 ptr,
 151                  struct wil6210_mbox_hdr *hdr)
 152 {
 153         void __iomem *src = wmi_buffer(wil, ptr);
 154         if (!src)
 155                 return -EINVAL;
 156
 157         wil_memcpy_fromio_32(hdr, src, sizeof(*hdr));
 158
 159         return 0;
 160 }
 161
 162 static int __wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
 163 {
 164         struct {
 165                 struct wil6210_mbox_hdr hdr;
 166                 struct wil6210_mbox_hdr_wmi wmi;
 167         } __packed cmd = {
 168                 .hdr = {
 169                         .type = WIL_MBOX_HDR_TYPE_WMI,
 170                         .flags = 0,
 171                         .len = cpu_to_le16(sizeof(cmd.wmi) + len),
 172                 },
 173                 .wmi = {
 174                         .id = cpu_to_le16(cmdid),
 175                         .info1 = 0,
 176                 },
 177         };
 178         struct wil6210_mbox_ring *r = &wil->mbox_ctl.tx;
 179         struct wil6210_mbox_ring_desc d_head;
 180         u32 next_head;
 181         void __iomem *dst;
 182         void __iomem *head = wmi_addr(wil, r->head);
 183         uint retry;
 184
 185         if (sizeof(cmd) + len > r->entry_size) {
 186                 wil_err(wil, "WMI size too large: %d bytes, max is %d\n",
 187                         (int)(sizeof(cmd) + len), r->entry_size);
 188                 return -ERANGE;
 189
 190         }
 191
 192         might_sleep();
 193
 194         if (!test_bit(wil_status_fwready, &wil->status)) {
 195                 wil_err(wil, "FW not ready\n");
 196                 return -EAGAIN;
 197         }
 198
 199         if (!head) {
 200                 wil_err(wil, "WMI head is garbage: 0x%08x\n", r->head);
 201                 return -EINVAL;
 202         }
 203         /* read Tx head till it is not busy */
 204         for (retry = 5; retry > 0; retry--) {
 205                 wil_memcpy_fromio_32(&d_head, head, sizeof(d_head));
 206                 if (d_head.sync == 0)
 207                         break;
 208                 msleep(20);
 209         }
 210         if (d_head.sync != 0) {
 211                 wil_err(wil, "WMI head busy\n");
 212                 return -EBUSY;
 213         }
 214         /* next head */
 215         next_head = r->base + ((r->head - r->base + sizeof(d_head)) % r->size);
 216         wil_dbg_WMI(wil, "Head 0x%08x -> 0x%08x\n", r->head, next_head);
 217         /* wait till FW finish with previous command */
 218         for (retry = 5; retry > 0; retry--) {
 219                 r->tail = ioread32(wil->csr + HOST_MBOX +
 220                                    offsetof(struct wil6210_mbox_ctl, tx.tail));
 221                 if (next_head != r->tail)
 222                         break;
 223                 msleep(20);
 224         }
 225         if (next_head == r->tail) {
 226                 wil_err(wil, "WMI ring full\n");
 227                 return -EBUSY;
 228         }
 229         dst = wmi_buffer(wil, d_head.addr);
 230         if (!dst) {
 231                 wil_err(wil, "invalid WMI buffer: 0x%08x\n",
 232                         le32_to_cpu(d_head.addr));
 233                 return -EINVAL;
 234         }
 235         cmd.hdr.seq = cpu_to_le16(++wil->wmi_seq);
 236         /* set command */
 237         wil_dbg_WMI(wil, "WMI command 0x%04x [%d]\n", cmdid, len);
 238         wil_hex_dump_WMI("Cmd ", DUMP_PREFIX_OFFSET, 16, 1, &cmd,
 239                          sizeof(cmd), true);
 240         wil_hex_dump_WMI("cmd ", DUMP_PREFIX_OFFSET, 16, 1, buf,
 241                          len, true);
 242         wil_memcpy_toio_32(dst, &cmd, sizeof(cmd));
 243         wil_memcpy_toio_32(dst + sizeof(cmd), buf, len);
 244         /* mark entry as full */
 245         iowrite32(1, wil->csr + HOSTADDR(r->head) +
 246                   offsetof(struct wil6210_mbox_ring_desc, sync));
 247         /* advance next ptr */
 248         iowrite32(r->head = next_head, wil->csr + HOST_MBOX +
 249                   offsetof(struct wil6210_mbox_ctl, tx.head));
 250
 251         /* interrupt to FW */
 252         iowrite32(SW_INT_MBOX, wil->csr + HOST_SW_INT);
 253
 254         return 0;
 255 }
 256
 257 int wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
 258 {
 259         int rc;
 260
 261         mutex_lock(&wil->wmi_mutex);
 262         rc = __wmi_send(wil, cmdid, buf, len);
 263         mutex_unlock(&wil->wmi_mutex);
 264
 265         return rc;
 266 }
 267
 268 /*=== Event handlers ===*/
 269 static void wmi_evt_ready(struct wil6210_priv *wil, int id, void *d, int len)
 270 {
 271         struct net_device *ndev = wil_to_ndev(wil);
 272         struct wireless_dev *wdev = wil->wdev;
 273         struct wmi_ready_event *evt = d;
 274         u32 ver = le32_to_cpu(evt->sw_version);
 275
 276         wil_dbg_WMI(wil, "FW ver. %d; MAC %pM\n", ver, evt->mac);
 277
 278         if (!is_valid_ether_addr(ndev->dev_addr)) {
 279                 memcpy(ndev->dev_addr, evt->mac, ETH_ALEN);
 280                 memcpy(ndev->perm_addr, evt->mac, ETH_ALEN);
 281         }
 282         snprintf(wdev->wiphy->fw_version, sizeof(wdev->wiphy->fw_version),
 283                  "%d", ver);
 284 }
 285
 286 static void wmi_evt_fw_ready(struct wil6210_priv *wil, int id, void *d,
 287                              int len)
 288 {
 289         wil_dbg_WMI(wil, "WMI: FW ready\n");
 290
 291         set_bit(wil_status_fwready, &wil->status);
 292         /* reuse wmi_ready for the firmware ready indication */
 293         complete(&wil->wmi_ready);
 294 }
 295
 296 static void wmi_evt_rx_mgmt(struct wil6210_priv *wil, int id, void *d, int len)
 297 {
 298         struct wmi_rx_mgmt_packet_event *data = d;
 299         struct wiphy *wiphy = wil_to_wiphy(wil);
 300         struct ieee80211_mgmt *rx_mgmt_frame =
 301                         (struct ieee80211_mgmt *)data->payload;
 302         int ch_no = data->info.channel+1;
 303         u32 freq = ieee80211_channel_to_frequency(ch_no,
 304                         IEEE80211_BAND_60GHZ);
 305         struct ieee80211_channel *channel = ieee80211_get_channel(wiphy, freq);
 306         /* TODO convert LE to CPU */
 307         s32 signal = 0; /* TODO */
 308         __le16 fc = rx_mgmt_frame->frame_control;
 309         u32 d_len = le32_to_cpu(data->info.len);
 310         u16 d_status = le16_to_cpu(data->info.status);
 311
 312         wil_dbg_WMI(wil, "MGMT: channel %d MCS %d SNR %d\n",
 313                     data->info.channel, data->info.mcs, data->info.snr);
 314         wil_dbg_WMI(wil, "status 0x%04x len %d stype %04x\n", d_status, d_len,
 315                     le16_to_cpu(data->info.stype));
 316         wil_dbg_WMI(wil, "qid %d mid %d cid %d\n",
 317                     data->info.qid, data->info.mid, data->info.cid);
 318
 319         if (!channel) {
 320                 wil_err(wil, "Frame on unsupported channel\n");
 321                 return;
 322         }
 323
 324         if (ieee80211_is_beacon(fc) || ieee80211_is_probe_resp(fc)) {
 325                 struct cfg80211_bss *bss;
 326                 u64 tsf = le64_to_cpu(rx_mgmt_frame->u.beacon.timestamp);
 327                 u16 cap = le16_to_cpu(rx_mgmt_frame->u.beacon.capab_info);
 328                 u16 bi = le16_to_cpu(rx_mgmt_frame->u.beacon.beacon_int);
 329                 const u8 *ie_buf = rx_mgmt_frame->u.beacon.variable;
 330                 size_t ie_len = d_len - offsetof(struct ieee80211_mgmt,
 331                                                  u.beacon.variable);
 332                 wil_dbg_WMI(wil, "Capability info : 0x%04x\n", cap);
 333
 334                 bss = cfg80211_inform_bss(wiphy, channel, rx_mgmt_frame->bssid,
 335                                           tsf, cap, bi, ie_buf, ie_len,
 336                                           signal, GFP_KERNEL);
 337                 if (bss) {
 338                         wil_dbg_WMI(wil, "Added BSS %pM\n",
 339                                     rx_mgmt_frame->bssid);
 340                         cfg80211_put_bss(bss);
 341                 } else {
 342                         wil_err(wil, "cfg80211_inform_bss() failed\n");
 343                 }
 344         }
 345 }
 346
 347 static void wmi_evt_scan_complete(struct wil6210_priv *wil, int id,
 348                                   void *d, int len)
 349 {
 350         if (wil->scan_request) {
 351                 struct wmi_scan_complete_event *data = d;
 352                 bool aborted = (data->status != 0);
 353
 354                 wil_dbg_WMI(wil, "SCAN_COMPLETE(0x%08x)\n", data->status);
 355                 cfg80211_scan_done(wil->scan_request, aborted);
 356                 wil->scan_request = NULL;
 357         } else {
 358                 wil_err(wil, "SCAN_COMPLETE while not scanning\n");
 359         }
 360 }
 361
 362 static void wmi_evt_connect(struct wil6210_priv *wil, int id, void *d, int len)
 363 {
 364         struct net_device *ndev = wil_to_ndev(wil);
 365         struct wireless_dev *wdev = wil->wdev;
 366         struct wmi_connect_event *evt = d;
 367         int ch; /* channel number */
 368         struct station_info sinfo;
 369         u8 *assoc_req_ie, *assoc_resp_ie;
 370         size_t assoc_req_ielen, assoc_resp_ielen;
 371         /* capinfo(u16) + listen_interval(u16) + IEs */
 372         const size_t assoc_req_ie_offset = sizeof(u16) * 2;
 373         /* capinfo(u16) + status_code(u16) + associd(u16) + IEs */
 374         const size_t assoc_resp_ie_offset = sizeof(u16) * 3;
 375
 376         if (len < sizeof(*evt)) {
 377                 wil_err(wil, "Connect event too short : %d bytes\n", len);
 378                 return;
 379         }
 380         if (len != sizeof(*evt) + evt->beacon_ie_len + evt->assoc_req_len +
 381                    evt->assoc_resp_len) {
 382                 wil_err(wil,
 383                         "Connect event corrupted : %d != %d + %d + %d + %d\n",
 384                         len, (int)sizeof(*evt), evt->beacon_ie_len,
 385                         evt->assoc_req_len, evt->assoc_resp_len);
 386                 return;
 387         }
 388         ch = evt->channel + 1;
 389         wil_dbg_WMI(wil, "Connect %pM channel [%d] cid %d\n",
 390                     evt->bssid, ch, evt->cid);
 391         wil_hex_dump_WMI("connect AI : ", DUMP_PREFIX_OFFSET, 16, 1,
 392                          evt->assoc_info, len - sizeof(*evt), true);
 393
 394         /* figure out IE's */
 395         assoc_req_ie = &evt->assoc_info[evt->beacon_ie_len +
 396                                         assoc_req_ie_offset];
 397         assoc_req_ielen = evt->assoc_req_len - assoc_req_ie_offset;
 398         if (evt->assoc_req_len <= assoc_req_ie_offset) {
 399                 assoc_req_ie = NULL;
 400                 assoc_req_ielen = 0;
 401         }
 402
 403         assoc_resp_ie = &evt->assoc_info[evt->beacon_ie_len +
 404                                          evt->assoc_req_len +
 405                                          assoc_resp_ie_offset];
 406         assoc_resp_ielen = evt->assoc_resp_len - assoc_resp_ie_offset;
 407         if (evt->assoc_resp_len <= assoc_resp_ie_offset) {
 408                 assoc_resp_ie = NULL;
 409                 assoc_resp_ielen = 0;
 410         }
 411
 412         if ((wdev->iftype == NL80211_IFTYPE_STATION) ||
 413             (wdev->iftype == NL80211_IFTYPE_P2P_CLIENT)) {
 414                 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
 415                         wil_err(wil, "Not in connecting state\n");
 416                         return;
 417                 }
 418                 del_timer_sync(&wil->connect_timer);
 419                 cfg80211_connect_result(ndev, evt->bssid,
 420                                         assoc_req_ie, assoc_req_ielen,
 421                                         assoc_resp_ie, assoc_resp_ielen,
 422                                         WLAN_STATUS_SUCCESS, GFP_KERNEL);
 423
 424         } else if ((wdev->iftype == NL80211_IFTYPE_AP) ||
 425                    (wdev->iftype == NL80211_IFTYPE_P2P_GO)) {
 426                 memset(&sinfo, 0, sizeof(sinfo));
 427
 428                 sinfo.generation = wil->sinfo_gen++;
 429
 430                 if (assoc_req_ie) {
 431                         sinfo.assoc_req_ies = assoc_req_ie;
 432                         sinfo.assoc_req_ies_len = assoc_req_ielen;
 433                         sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
 434                 }
 435
 436                 cfg80211_new_sta(ndev, evt->bssid, &sinfo, GFP_KERNEL);
 437         }
 438         set_bit(wil_status_fwconnected, &wil->status);
 439
 440         /* FIXME FW can transmit only ucast frames to peer */
 441         /* FIXME real ring_id instead of hard coded 0 */
 442         memcpy(wil->dst_addr[0], evt->bssid, ETH_ALEN);
 443
 444         wil->pending_connect_cid = evt->cid;
 445         queue_work(wil->wmi_wq_conn, &wil->wmi_connect_worker);
 446 }
 447
 448 static void wmi_evt_disconnect(struct wil6210_priv *wil, int id,
 449                                void *d, int len)
 450 {
 451         struct wmi_disconnect_event *evt = d;
 452
 453         wil_dbg_WMI(wil, "Disconnect %pM reason %d proto %d wmi\n",
 454                     evt->bssid,
 455                     evt->protocol_reason_status, evt->disconnect_reason);
 456
 457         wil->sinfo_gen++;
 458
 459         wil6210_disconnect(wil, evt->bssid);
 460         clear_bit(wil_status_dontscan, &wil->status);
 461 }
 462
 463 static void wmi_evt_notify(struct wil6210_priv *wil, int id, void *d, int len)
 464 {
 465         struct wmi_notify_req_done_event *evt = d;
 466
 467         if (len < sizeof(*evt)) {
 468                 wil_err(wil, "Short NOTIFY event\n");
 469                 return;
 470         }
 471
 472         wil->stats.tsf = le64_to_cpu(evt->tsf);
 473         wil->stats.snr = le32_to_cpu(evt->snr_val);
 474         wil->stats.bf_mcs = le16_to_cpu(evt->bf_mcs);
 475         wil->stats.my_rx_sector = le16_to_cpu(evt->my_rx_sector);
 476         wil->stats.my_tx_sector = le16_to_cpu(evt->my_tx_sector);
 477         wil->stats.peer_rx_sector = le16_to_cpu(evt->other_rx_sector);
 478         wil->stats.peer_tx_sector = le16_to_cpu(evt->other_tx_sector);
 479         wil_dbg_WMI(wil, "Link status, MCS %d TSF 0x%016llx\n"
 480                     "BF status 0x%08x SNR 0x%08x\n"
 481                     "Tx Tpt %d goodput %d Rx goodput %d\n"
 482                     "Sectors(rx:tx) my %d:%d peer %d:%d\n",
 483                     wil->stats.bf_mcs, wil->stats.tsf, evt->status,
 484                     wil->stats.snr, le32_to_cpu(evt->tx_tpt),
 485                     le32_to_cpu(evt->tx_goodput), le32_to_cpu(evt->rx_goodput),
 486                     wil->stats.my_rx_sector, wil->stats.my_tx_sector,
 487                     wil->stats.peer_rx_sector, wil->stats.peer_tx_sector);
 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
 504         wil_dbg_WMI(wil, "EAPOL len %d from %pM\n", eapol_len,
 505                     evt->src_mac);
 506
 507         if (eapol_len > 196) { /* TODO: revisit size limit */
 508                 wil_err(wil, "EAPOL too large\n");
 509                 return;
 510         }
 511
 512         skb = alloc_skb(sz, GFP_KERNEL);
 513         if (!skb) {
 514                 wil_err(wil, "Failed to allocate skb\n");
 515                 return;
 516         }
 517         eth = (struct ethhdr *)skb_put(skb, ETH_HLEN);
 518         memcpy(eth->h_dest, ndev->dev_addr, ETH_ALEN);
 519         memcpy(eth->h_source, evt->src_mac, ETH_ALEN);
 520         eth->h_proto = cpu_to_be16(ETH_P_PAE);
 521         memcpy(skb_put(skb, eapol_len), evt->eapol, eapol_len);
 522         skb->protocol = eth_type_trans(skb, ndev);
 523         if (likely(netif_rx_ni(skb) == NET_RX_SUCCESS)) {
 524                 ndev->stats.rx_packets++;
 525                 ndev->stats.rx_bytes += skb->len;
 526         } else {
 527                 ndev->stats.rx_dropped++;
 528         }
 529 }
 530
 531 static const struct {
 532         int eventid;
 533         void (*handler)(struct wil6210_priv *wil, int eventid,
 534                         void *data, int data_len);
 535 } wmi_evt_handlers[] = {
 536         {WMI_READY_EVENTID,             wmi_evt_ready},
 537         {WMI_FW_READY_EVENTID,          wmi_evt_fw_ready},
 538         {WMI_RX_MGMT_PACKET_EVENTID,    wmi_evt_rx_mgmt},
 539         {WMI_SCAN_COMPLETE_EVENTID,     wmi_evt_scan_complete},
 540         {WMI_CONNECT_EVENTID,           wmi_evt_connect},
 541         {WMI_DISCONNECT_EVENTID,        wmi_evt_disconnect},
 542         {WMI_NOTIFY_REQ_DONE_EVENTID,   wmi_evt_notify},
 543         {WMI_EAPOL_RX_EVENTID,          wmi_evt_eapol_rx},
 544 };
 545
 546 /*
 547  * Run in IRQ context
 548  * Extract WMI command from mailbox. Queue it to the @wil->pending_wmi_ev
 549  * that will be eventually handled by the @wmi_event_worker in the thread
 550  * context of thread "wil6210_wmi"
 551  */
 552 void wmi_recv_cmd(struct wil6210_priv *wil)
 553 {
 554         struct wil6210_mbox_ring_desc d_tail;
 555         struct wil6210_mbox_hdr hdr;
 556         struct wil6210_mbox_ring *r = &wil->mbox_ctl.rx;
 557         struct pending_wmi_event *evt;
 558         u8 *cmd;
 559         void __iomem *src;
 560         ulong flags;
 561
 562         for (;;) {
 563                 u16 len;
 564
 565                 r->head = ioread32(wil->csr + HOST_MBOX +
 566                                    offsetof(struct wil6210_mbox_ctl, rx.head));
 567                 if (r->tail == r->head)
 568                         return;
 569
 570                 /* read cmd from tail */
 571                 wil_memcpy_fromio_32(&d_tail, wil->csr + HOSTADDR(r->tail),
 572                                      sizeof(struct wil6210_mbox_ring_desc));
 573                 if (d_tail.sync == 0) {
 574                         wil_err(wil, "Mbox evt not owned by FW?\n");
 575                         return;
 576                 }
 577
 578                 if (0 != wmi_read_hdr(wil, d_tail.addr, &hdr)) {
 579                         wil_err(wil, "Mbox evt at 0x%08x?\n",
 580                                 le32_to_cpu(d_tail.addr));
 581                         return;
 582                 }
 583
 584                 len = le16_to_cpu(hdr.len);
 585                 src = wmi_buffer(wil, d_tail.addr) +
 586                       sizeof(struct wil6210_mbox_hdr);
 587                 evt = kmalloc(ALIGN(offsetof(struct pending_wmi_event,
 588                                              event.wmi) + len, 4),
 589                               GFP_KERNEL);
 590                 if (!evt) {
 591                         wil_err(wil, "kmalloc for WMI event (%d) failed\n",
 592                                 len);
 593                         return;
 594                 }
 595                 evt->event.hdr = hdr;
 596                 cmd = (void *)&evt->event.wmi;
 597                 wil_memcpy_fromio_32(cmd, src, len);
 598                 /* mark entry as empty */
 599                 iowrite32(0, wil->csr + HOSTADDR(r->tail) +
 600                           offsetof(struct wil6210_mbox_ring_desc, sync));
 601                 /* indicate */
 602                 wil_dbg_WMI(wil, "Mbox evt %04x %04x %04x %02x\n",
 603                             le16_to_cpu(hdr.seq), len, le16_to_cpu(hdr.type),
 604                             hdr.flags);
 605                 if ((hdr.type == WIL_MBOX_HDR_TYPE_WMI) &&
 606                     (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 607                         wil_dbg_WMI(wil, "WMI event 0x%04x\n",
 608                                     evt->event.wmi.id);
 609                 }
 610                 wil_hex_dump_WMI("evt ", DUMP_PREFIX_OFFSET, 16, 1,
 611                                  &evt->event.hdr, sizeof(hdr) + len, true);
 612
 613                 /* advance tail */
 614                 r->tail = r->base + ((r->tail - r->base +
 615                           sizeof(struct wil6210_mbox_ring_desc)) % r->size);
 616                 iowrite32(r->tail, wil->csr + HOST_MBOX +
 617                           offsetof(struct wil6210_mbox_ctl, rx.tail));
 618
 619                 /* add to the pending list */
 620                 spin_lock_irqsave(&wil->wmi_ev_lock, flags);
 621                 list_add_tail(&evt->list, &wil->pending_wmi_ev);
 622                 spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
 623                 {
 624                         int q = queue_work(wil->wmi_wq,
 625                                            &wil->wmi_event_worker);
 626                         wil_dbg_WMI(wil, "queue_work -> %d\n", q);
 627                 }
 628         }
 629 }
 630
 631 int wmi_call(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len,
 632              u16 reply_id, void *reply, u8 reply_size, int to_msec)
 633 {
 634         int rc;
 635         int remain;
 636
 637         mutex_lock(&wil->wmi_mutex);
 638
 639         rc = __wmi_send(wil, cmdid, buf, len);
 640         if (rc)
 641                 goto out;
 642
 643         wil->reply_id = reply_id;
 644         wil->reply_buf = reply;
 645         wil->reply_size = reply_size;
 646         remain = wait_for_completion_timeout(&wil->wmi_ready,
 647                         msecs_to_jiffies(to_msec));
 648         if (0 == remain) {
 649                 wil_err(wil, "wmi_call(0x%04x->0x%04x) timeout %d msec\n",
 650                         cmdid, reply_id, to_msec);
 651                 rc = -ETIME;
 652         } else {
 653                 wil_dbg_WMI(wil,
 654                             "wmi_call(0x%04x->0x%04x) completed in %d msec\n",
 655                             cmdid, reply_id,
 656                             to_msec - jiffies_to_msecs(remain));
 657         }
 658         wil->reply_id = 0;
 659         wil->reply_buf = NULL;
 660         wil->reply_size = 0;
 661  out:
 662         mutex_unlock(&wil->wmi_mutex);
 663
 664         return rc;
 665 }
 666
 667 int wmi_echo(struct wil6210_priv *wil)
 668 {
 669         struct wmi_echo_cmd cmd = {
 670                 .value = cpu_to_le32(0x12345678),
 671         };
 672
 673         return wmi_call(wil, WMI_ECHO_CMDID, &cmd, sizeof(cmd),
 674                          WMI_ECHO_RSP_EVENTID, NULL, 0, 20);
 675 }
 676
 677 int wmi_set_mac_address(struct wil6210_priv *wil, void *addr)
 678 {
 679         struct wmi_set_mac_address_cmd cmd;
 680
 681         memcpy(cmd.mac, addr, ETH_ALEN);
 682
 683         wil_dbg_WMI(wil, "Set MAC %pM\n", addr);
 684
 685         return wmi_send(wil, WMI_SET_MAC_ADDRESS_CMDID, &cmd, sizeof(cmd));
 686 }
 687
 688 int wmi_set_bcon(struct wil6210_priv *wil, int bi, u8 wmi_nettype)
 689 {
 690         struct wmi_bcon_ctrl_cmd cmd = {
 691                 .bcon_interval = cpu_to_le16(bi),
 692                 .network_type = wmi_nettype,
 693                 .disable_sec_offload = 1,
 694         };
 695
 696         if (!wil->secure_pcp)
 697                 cmd.disable_sec = 1;
 698
 699         return wmi_send(wil, WMI_BCON_CTRL_CMDID, &cmd, sizeof(cmd));
 700 }
 701
 702 int wmi_set_ssid(struct wil6210_priv *wil, u8 ssid_len, const void *ssid)
 703 {
 704         struct wmi_set_ssid_cmd cmd = {
 705                 .ssid_len = cpu_to_le32(ssid_len),
 706         };
 707
 708         if (ssid_len > sizeof(cmd.ssid))
 709                 return -EINVAL;
 710
 711         memcpy(cmd.ssid, ssid, ssid_len);
 712
 713         return wmi_send(wil, WMI_SET_SSID_CMDID, &cmd, sizeof(cmd));
 714 }
 715
 716 int wmi_get_ssid(struct wil6210_priv *wil, u8 *ssid_len, void *ssid)
 717 {
 718         int rc;
 719         struct {
 720                 struct wil6210_mbox_hdr_wmi wmi;
 721                 struct wmi_set_ssid_cmd cmd;
 722         } __packed reply;
 723         int len; /* reply.cmd.ssid_len in CPU order */
 724
 725         rc = wmi_call(wil, WMI_GET_SSID_CMDID, NULL, 0, WMI_GET_SSID_EVENTID,
 726                       &reply, sizeof(reply), 20);
 727         if (rc)
 728                 return rc;
 729
 730         len = le32_to_cpu(reply.cmd.ssid_len);
 731         if (len > sizeof(reply.cmd.ssid))
 732                 return -EINVAL;
 733
 734         *ssid_len = len;
 735         memcpy(ssid, reply.cmd.ssid, len);
 736
 737         return 0;
 738 }
 739
 740 int wmi_set_channel(struct wil6210_priv *wil, int channel)
 741 {
 742         struct wmi_set_pcp_channel_cmd cmd = {
 743                 .channel = channel - 1,
 744         };
 745
 746         return wmi_send(wil, WMI_SET_PCP_CHANNEL_CMDID, &cmd, sizeof(cmd));
 747 }
 748
 749 int wmi_get_channel(struct wil6210_priv *wil, int *channel)
 750 {
 751         int rc;
 752         struct {
 753                 struct wil6210_mbox_hdr_wmi wmi;
 754                 struct wmi_set_pcp_channel_cmd cmd;
 755         } __packed reply;
 756
 757         rc = wmi_call(wil, WMI_GET_PCP_CHANNEL_CMDID, NULL, 0,
 758                       WMI_GET_PCP_CHANNEL_EVENTID, &reply, sizeof(reply), 20);
 759         if (rc)
 760                 return rc;
 761
 762         if (reply.cmd.channel > 3)
 763                 return -EINVAL;
 764
 765         *channel = reply.cmd.channel + 1;
 766
 767         return 0;
 768 }
 769
 770 int wmi_tx_eapol(struct wil6210_priv *wil, struct sk_buff *skb)
 771 {
 772         struct wmi_eapol_tx_cmd *cmd;
 773         struct ethhdr *eth;
 774         u16 eapol_len = skb->len - ETH_HLEN;
 775         void *eapol = skb->data + ETH_HLEN;
 776         uint i;
 777         int rc;
 778
 779         skb_set_mac_header(skb, 0);
 780         eth = eth_hdr(skb);
 781         wil_dbg_WMI(wil, "EAPOL %d bytes to %pM\n", eapol_len, eth->h_dest);
 782         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 783                 if (memcmp(wil->dst_addr[i], eth->h_dest, ETH_ALEN) == 0)
 784                         goto found_dest;
 785         }
 786
 787         return -EINVAL;
 788
 789  found_dest:
 790         /* find out eapol data & len */
 791         cmd = kzalloc(sizeof(*cmd) + eapol_len, GFP_KERNEL);
 792         if (!cmd)
 793                 return -EINVAL;
 794
 795         memcpy(cmd->dst_mac, eth->h_dest, ETH_ALEN);
 796         cmd->eapol_len = cpu_to_le16(eapol_len);
 797         memcpy(cmd->eapol, eapol, eapol_len);
 798         rc = wmi_send(wil, WMI_EAPOL_TX_CMDID, cmd, sizeof(*cmd) + eapol_len);
 799         kfree(cmd);
 800
 801         return rc;
 802 }
 803
 804 int wmi_del_cipher_key(struct wil6210_priv *wil, u8 key_index,
 805                        const void *mac_addr)
 806 {
 807         struct wmi_delete_cipher_key_cmd cmd = {
 808                 .key_index = key_index,
 809         };
 810
 811         if (mac_addr)
 812                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 813
 814         return wmi_send(wil, WMI_DELETE_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 815 }
 816
 817 int wmi_add_cipher_key(struct wil6210_priv *wil, u8 key_index,
 818                        const void *mac_addr, int key_len, const void *key)
 819 {
 820         struct wmi_add_cipher_key_cmd cmd = {
 821                 .key_index = key_index,
 822                 .key_usage = WMI_KEY_USE_PAIRWISE,
 823                 .key_len = key_len,
 824         };
 825
 826         if (!key || (key_len > sizeof(cmd.key)))
 827                 return -EINVAL;
 828
 829         memcpy(cmd.key, key, key_len);
 830         if (mac_addr)
 831                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 832
 833         return wmi_send(wil, WMI_ADD_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 834 }
 835
 836 int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie)
 837 {
 838         int rc;
 839         u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len;
 840         struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL);
 841         if (!cmd) {
 842                 wil_err(wil, "kmalloc(%d) failed\n", len);
 843                 return -ENOMEM;
 844         }
 845
 846         cmd->mgmt_frm_type = type;
 847         /* BUG: FW API define ieLen as u8. Will fix FW */
 848         cmd->ie_len = cpu_to_le16(ie_len);
 849         memcpy(cmd->ie_info, ie, ie_len);
 850         rc = wmi_send(wil, WMI_SET_APPIE_CMDID, &cmd, len);
 851         kfree(cmd);
 852
 853         return rc;
 854 }
 855
 856 void wmi_event_flush(struct wil6210_priv *wil)
 857 {
 858         struct pending_wmi_event *evt, *t;
 859
 860         wil_dbg_WMI(wil, "%s()\n", __func__);
 861
 862         list_for_each_entry_safe(evt, t, &wil->pending_wmi_ev, list) {
 863                 list_del(&evt->list);
 864                 kfree(evt);
 865         }
 866 }
 867
 868 static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id,
 869                                  void *d, int len)
 870 {
 871         uint i;
 872
 873         for (i = 0; i < ARRAY_SIZE(wmi_evt_handlers); i++) {
 874                 if (wmi_evt_handlers[i].eventid == id) {
 875                         wmi_evt_handlers[i].handler(wil, id, d, len);
 876                         return true;
 877                 }
 878         }
 879
 880         return false;
 881 }
 882
 883 static void wmi_event_handle(struct wil6210_priv *wil,
 884                              struct wil6210_mbox_hdr *hdr)
 885 {
 886         u16 len = le16_to_cpu(hdr->len);
 887
 888         if ((hdr->type == WIL_MBOX_HDR_TYPE_WMI) &&
 889             (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 890                 struct wil6210_mbox_hdr_wmi *wmi = (void *)(&hdr[1]);
 891                 void *evt_data = (void *)(&wmi[1]);
 892                 u16 id = le16_to_cpu(wmi->id);
 893                 /* check if someone waits for this event */
 894                 if (wil->reply_id && wil->reply_id == id) {
 895                         if (wil->reply_buf) {
 896                                 memcpy(wil->reply_buf, wmi,
 897                                        min(len, wil->reply_size));
 898                         } else {
 899                                 wmi_evt_call_handler(wil, id, evt_data,
 900                                                      len - sizeof(*wmi));
 901                         }
 902                         wil_dbg_WMI(wil, "Complete WMI 0x%04x\n", id);
 903                         complete(&wil->wmi_ready);
 904                         return;
 905                 }
 906                 /* unsolicited event */
 907                 /* search for handler */
 908                 if (!wmi_evt_call_handler(wil, id, evt_data,
 909                                           len - sizeof(*wmi))) {
 910                         wil_err(wil, "Unhandled event 0x%04x\n", id);
 911                 }
 912         } else {
 913                 wil_err(wil, "Unknown event type\n");
 914                 print_hex_dump(KERN_ERR, "evt?? ", DUMP_PREFIX_OFFSET, 16, 1,
 915                                hdr, sizeof(*hdr) + len, true);
 916         }
 917 }
 918
 919 /*
 920  * Retrieve next WMI event from the pending list
 921  */
 922 static struct list_head *next_wmi_ev(struct wil6210_priv *wil)
 923 {
 924         ulong flags;
 925         struct list_head *ret = NULL;
 926
 927         spin_lock_irqsave(&wil->wmi_ev_lock, flags);
 928
 929         if (!list_empty(&wil->pending_wmi_ev)) {
 930                 ret = wil->pending_wmi_ev.next;
 931                 list_del(ret);
 932         }
 933
 934         spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
 935
 936         return ret;
 937 }
 938
 939 /*
 940  * Handler for the WMI events
 941  */
 942 void wmi_event_worker(struct work_struct *work)
 943 {
 944         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 945                                                  wmi_event_worker);
 946         struct pending_wmi_event *evt;
 947         struct list_head *lh;
 948
 949         while ((lh = next_wmi_ev(wil)) != NULL) {
 950                 evt = list_entry(lh, struct pending_wmi_event, list);
 951                 wmi_event_handle(wil, &evt->event.hdr);
 952                 kfree(evt);
 953         }
 954 }
 955
 956 void wmi_connect_worker(struct work_struct *work)
 957 {
 958         int rc;
 959         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 960                                                 wmi_connect_worker);
 961
 962         if (wil->pending_connect_cid < 0) {
 963                 wil_err(wil, "No connection pending\n");
 964                 return;
 965         }
 966
 967         wil_dbg_WMI(wil, "Configure for connection CID %d\n",
 968                     wil->pending_connect_cid);
 969
 970         rc = wil_vring_init_tx(wil, 0, WIL6210_TX_RING_SIZE,
 971                                wil->pending_connect_cid, 0);
 972         wil->pending_connect_cid = -1;
 973         if (rc == 0)
 974                 wil_link_on(wil);
 975 }