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 #include <linux/if_arp.h>
  22
  23 #include "wil6210.h"
  24 #include "txrx.h"
  25 #include "wmi.h"
  26
  27 /**
  28  * WMI event receiving - theory of operations
  29  *
  30  * When firmware about to report WMI event, it fills memory area
  31  * in the mailbox and raises misc. IRQ. Thread interrupt handler invoked for
  32  * the misc IRQ, function @wmi_recv_cmd called by thread IRQ handler.
  33  *
  34  * @wmi_recv_cmd reads event, allocates memory chunk  and attaches it to the
  35  * event list @wil->pending_wmi_ev. Then, work queue @wil->wmi_wq wakes up
  36  * and handles events within the @wmi_event_worker. Every event get detached
  37  * from list, processed and deleted.
  38  *
  39  * Purpose for this mechanism is to release IRQ thread; otherwise,
  40  * if WMI event handling involves another WMI command flow, this 2-nd flow
  41  * won't be completed because of blocked IRQ thread.
  42  */
  43
  44 /**
  45  * Addressing - theory of operations
  46  *
  47  * There are several buses present on the WIL6210 card.
  48  * Same memory areas are visible at different address on
  49  * the different busses. There are 3 main bus masters:
  50  *  - MAC CPU (ucode)
  51  *  - User CPU (firmware)
  52  *  - AHB (host)
  53  *
  54  * On the PCI bus, there is one BAR (BAR0) of 2Mb size, exposing
  55  * AHB addresses starting from 0x880000
  56  *
  57  * Internally, firmware uses addresses that allows faster access but
  58  * are invisible from the host. To read from these addresses, alternative
  59  * AHB address must be used.
  60  *
  61  * Memory mapping
  62  * Linker address         PCI/Host address
  63  *                        0x880000 .. 0xa80000  2Mb BAR0
  64  * 0x800000 .. 0x807000   0x900000 .. 0x907000  28k DCCM
  65  * 0x840000 .. 0x857000   0x908000 .. 0x91f000  92k PERIPH
  66  */
  67
  68 /**
  69  * @fw_mapping provides memory remapping table
  70  */
  71 static const struct {
  72         u32 from; /* linker address - from, inclusive */
  73         u32 to;   /* linker address - to, exclusive */
  74         u32 host; /* PCI/Host address - BAR0 + 0x880000 */
  75 } fw_mapping[] = {
  76         {0x000000, 0x040000, 0x8c0000}, /* FW code RAM 256k */
  77         {0x800000, 0x808000, 0x900000}, /* FW data RAM 32k */
  78         {0x840000, 0x860000, 0x908000}, /* peripheral data RAM 128k/96k used */
  79         {0x880000, 0x88a000, 0x880000}, /* various RGF */
  80         {0x8c0000, 0x932000, 0x8c0000}, /* trivial mapping for upper area */
  81         /*
  82          * 920000..930000 ucode code RAM
  83          * 930000..932000 ucode data RAM
  84          */
  85 };
  86
  87 /**
  88  * return AHB address for given firmware/ucode internal (linker) address
  89  * @x - internal address
  90  * If address have no valid AHB mapping, return 0
  91  */
  92 static u32 wmi_addr_remap(u32 x)
  93 {
  94         uint i;
  95
  96         for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
  97                 if ((x >= fw_mapping[i].from) && (x < fw_mapping[i].to))
  98                         return x + fw_mapping[i].host - fw_mapping[i].from;
  99         }
 100
 101         return 0;
 102 }
 103
 104 /**
 105  * Check address validity for WMI buffer; remap if needed
 106  * @ptr - internal (linker) fw/ucode address
 107  *
 108  * Valid buffer should be DWORD aligned
 109  *
 110  * return address for accessing buffer from the host;
 111  * if buffer is not valid, return NULL.
 112  */
 113 void __iomem *wmi_buffer(struct wil6210_priv *wil, __le32 ptr_)
 114 {
 115         u32 off;
 116         u32 ptr = le32_to_cpu(ptr_);
 117
 118         if (ptr % 4)
 119                 return NULL;
 120
 121         ptr = wmi_addr_remap(ptr);
 122         if (ptr < WIL6210_FW_HOST_OFF)
 123                 return NULL;
 124
 125         off = HOSTADDR(ptr);
 126         if (off > WIL6210_MEM_SIZE - 4)
 127                 return NULL;
 128
 129         return wil->csr + off;
 130 }
 131
 132 /**
 133  * Check address validity
 134  */
 135 void __iomem *wmi_addr(struct wil6210_priv *wil, u32 ptr)
 136 {
 137         u32 off;
 138
 139         if (ptr % 4)
 140                 return NULL;
 141
 142         if (ptr < WIL6210_FW_HOST_OFF)
 143                 return NULL;
 144
 145         off = HOSTADDR(ptr);
 146         if (off > WIL6210_MEM_SIZE - 4)
 147                 return NULL;
 148
 149         return wil->csr + off;
 150 }
 151
 152 int wmi_read_hdr(struct wil6210_priv *wil, __le32 ptr,
 153                  struct wil6210_mbox_hdr *hdr)
 154 {
 155         void __iomem *src = wmi_buffer(wil, ptr);
 156         if (!src)
 157                 return -EINVAL;
 158
 159         wil_memcpy_fromio_32(hdr, src, sizeof(*hdr));
 160
 161         return 0;
 162 }
 163
 164 static int __wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
 165 {
 166         struct {
 167                 struct wil6210_mbox_hdr hdr;
 168                 struct wil6210_mbox_hdr_wmi wmi;
 169         } __packed cmd = {
 170                 .hdr = {
 171                         .type = WIL_MBOX_HDR_TYPE_WMI,
 172                         .flags = 0,
 173                         .len = cpu_to_le16(sizeof(cmd.wmi) + len),
 174                 },
 175                 .wmi = {
 176                         .id = cpu_to_le16(cmdid),
 177                         .info1 = 0,
 178                 },
 179         };
 180         struct wil6210_mbox_ring *r = &wil->mbox_ctl.tx;
 181         struct wil6210_mbox_ring_desc d_head;
 182         u32 next_head;
 183         void __iomem *dst;
 184         void __iomem *head = wmi_addr(wil, r->head);
 185         uint retry;
 186
 187         if (sizeof(cmd) + len > r->entry_size) {
 188                 wil_err(wil, "WMI size too large: %d bytes, max is %d\n",
 189                         (int)(sizeof(cmd) + len), r->entry_size);
 190                 return -ERANGE;
 191         }
 192
 193         might_sleep();
 194
 195         if (!test_bit(wil_status_fwready, &wil->status)) {
 196                 wil_err(wil, "FW not ready\n");
 197                 return -EAGAIN;
 198         }
 199
 200         if (!head) {
 201                 wil_err(wil, "WMI head is garbage: 0x%08x\n", r->head);
 202                 return -EINVAL;
 203         }
 204         /* read Tx head till it is not busy */
 205         for (retry = 5; retry > 0; retry--) {
 206                 wil_memcpy_fromio_32(&d_head, head, sizeof(d_head));
 207                 if (d_head.sync == 0)
 208                         break;
 209                 msleep(20);
 210         }
 211         if (d_head.sync != 0) {
 212                 wil_err(wil, "WMI head busy\n");
 213                 return -EBUSY;
 214         }
 215         /* next head */
 216         next_head = r->base + ((r->head - r->base + sizeof(d_head)) % r->size);
 217         wil_dbg_wmi(wil, "Head 0x%08x -> 0x%08x\n", r->head, next_head);
 218         /* wait till FW finish with previous command */
 219         for (retry = 5; retry > 0; retry--) {
 220                 r->tail = ioread32(wil->csr + HOST_MBOX +
 221                                    offsetof(struct wil6210_mbox_ctl, tx.tail));
 222                 if (next_head != r->tail)
 223                         break;
 224                 msleep(20);
 225         }
 226         if (next_head == r->tail) {
 227                 wil_err(wil, "WMI ring full\n");
 228                 return -EBUSY;
 229         }
 230         dst = wmi_buffer(wil, d_head.addr);
 231         if (!dst) {
 232                 wil_err(wil, "invalid WMI buffer: 0x%08x\n",
 233                         le32_to_cpu(d_head.addr));
 234                 return -EINVAL;
 235         }
 236         cmd.hdr.seq = cpu_to_le16(++wil->wmi_seq);
 237         /* set command */
 238         wil_dbg_wmi(wil, "WMI command 0x%04x [%d]\n", cmdid, len);
 239         wil_hex_dump_wmi("Cmd ", DUMP_PREFIX_OFFSET, 16, 1, &cmd,
 240                          sizeof(cmd), true);
 241         wil_hex_dump_wmi("cmd ", DUMP_PREFIX_OFFSET, 16, 1, buf,
 242                          len, true);
 243         wil_memcpy_toio_32(dst, &cmd, sizeof(cmd));
 244         wil_memcpy_toio_32(dst + sizeof(cmd), buf, len);
 245         /* mark entry as full */
 246         iowrite32(1, wil->csr + HOSTADDR(r->head) +
 247                   offsetof(struct wil6210_mbox_ring_desc, sync));
 248         /* advance next ptr */
 249         iowrite32(r->head = next_head, wil->csr + HOST_MBOX +
 250                   offsetof(struct wil6210_mbox_ctl, tx.head));
 251
 252         /* interrupt to FW */
 253         iowrite32(SW_INT_MBOX, wil->csr + HOST_SW_INT);
 254
 255         return 0;
 256 }
 257
 258 int wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
 259 {
 260         int rc;
 261
 262         mutex_lock(&wil->wmi_mutex);
 263         rc = __wmi_send(wil, cmdid, buf, len);
 264         mutex_unlock(&wil->wmi_mutex);
 265
 266         return rc;
 267 }
 268
 269 /*=== Event handlers ===*/
 270 static void wmi_evt_ready(struct wil6210_priv *wil, int id, void *d, int len)
 271 {
 272         struct net_device *ndev = wil_to_ndev(wil);
 273         struct wireless_dev *wdev = wil->wdev;
 274         struct wmi_ready_event *evt = d;
 275         u32 ver = le32_to_cpu(evt->sw_version);
 276
 277         wil_dbg_wmi(wil, "FW ver. %d; MAC %pM\n", ver, evt->mac);
 278
 279         if (!is_valid_ether_addr(ndev->dev_addr)) {
 280                 memcpy(ndev->dev_addr, evt->mac, ETH_ALEN);
 281                 memcpy(ndev->perm_addr, evt->mac, ETH_ALEN);
 282         }
 283         snprintf(wdev->wiphy->fw_version, sizeof(wdev->wiphy->fw_version),
 284                  "%d", ver);
 285 }
 286
 287 static void wmi_evt_fw_ready(struct wil6210_priv *wil, int id, void *d,
 288                              int len)
 289 {
 290         wil_dbg_wmi(wil, "WMI: FW ready\n");
 291
 292         set_bit(wil_status_fwready, &wil->status);
 293         /* reuse wmi_ready for the firmware ready indication */
 294         complete(&wil->wmi_ready);
 295 }
 296
 297 static void wmi_evt_rx_mgmt(struct wil6210_priv *wil, int id, void *d, int len)
 298 {
 299         struct wmi_rx_mgmt_packet_event *data = d;
 300         struct wiphy *wiphy = wil_to_wiphy(wil);
 301         struct ieee80211_mgmt *rx_mgmt_frame =
 302                         (struct ieee80211_mgmt *)data->payload;
 303         int ch_no = data->info.channel+1;
 304         u32 freq = ieee80211_channel_to_frequency(ch_no,
 305                         IEEE80211_BAND_60GHZ);
 306         struct ieee80211_channel *channel = ieee80211_get_channel(wiphy, freq);
 307         /* TODO convert LE to CPU */
 308         s32 signal = 0; /* TODO */
 309         __le16 fc = rx_mgmt_frame->frame_control;
 310         u32 d_len = le32_to_cpu(data->info.len);
 311         u16 d_status = le16_to_cpu(data->info.status);
 312
 313         wil_dbg_wmi(wil, "MGMT: channel %d MCS %d SNR %d\n",
 314                     data->info.channel, data->info.mcs, data->info.snr);
 315         wil_dbg_wmi(wil, "status 0x%04x len %d stype %04x\n", d_status, d_len,
 316                     le16_to_cpu(data->info.stype));
 317         wil_dbg_wmi(wil, "qid %d mid %d cid %d\n",
 318                     data->info.qid, data->info.mid, data->info.cid);
 319
 320         if (!channel) {
 321                 wil_err(wil, "Frame on unsupported channel\n");
 322                 return;
 323         }
 324
 325         if (ieee80211_is_beacon(fc) || ieee80211_is_probe_resp(fc)) {
 326                 struct cfg80211_bss *bss;
 327
 328                 bss = cfg80211_inform_bss_frame(wiphy, channel, rx_mgmt_frame,
 329                                                 d_len, signal, GFP_KERNEL);
 330                 if (bss) {
 331                         wil_dbg_wmi(wil, "Added BSS %pM\n",
 332                                     rx_mgmt_frame->bssid);
 333                         cfg80211_put_bss(wiphy, bss);
 334                 } else {
 335                         wil_err(wil, "cfg80211_inform_bss() failed\n");
 336                 }
 337         }
 338 }
 339
 340 static void wmi_evt_scan_complete(struct wil6210_priv *wil, int id,
 341                                   void *d, int len)
 342 {
 343         if (wil->scan_request) {
 344                 struct wmi_scan_complete_event *data = d;
 345                 bool aborted = (data->status != 0);
 346
 347                 wil_dbg_wmi(wil, "SCAN_COMPLETE(0x%08x)\n", data->status);
 348                 cfg80211_scan_done(wil->scan_request, aborted);
 349                 wil->scan_request = NULL;
 350         } else {
 351                 wil_err(wil, "SCAN_COMPLETE while not scanning\n");
 352         }
 353 }
 354
 355 static void wmi_evt_connect(struct wil6210_priv *wil, int id, void *d, int len)
 356 {
 357         struct net_device *ndev = wil_to_ndev(wil);
 358         struct wireless_dev *wdev = wil->wdev;
 359         struct wmi_connect_event *evt = d;
 360         int ch; /* channel number */
 361         struct station_info sinfo;
 362         u8 *assoc_req_ie, *assoc_resp_ie;
 363         size_t assoc_req_ielen, assoc_resp_ielen;
 364         /* capinfo(u16) + listen_interval(u16) + IEs */
 365         const size_t assoc_req_ie_offset = sizeof(u16) * 2;
 366         /* capinfo(u16) + status_code(u16) + associd(u16) + IEs */
 367         const size_t assoc_resp_ie_offset = sizeof(u16) * 3;
 368
 369         if (len < sizeof(*evt)) {
 370                 wil_err(wil, "Connect event too short : %d bytes\n", len);
 371                 return;
 372         }
 373         if (len != sizeof(*evt) + evt->beacon_ie_len + evt->assoc_req_len +
 374                    evt->assoc_resp_len) {
 375                 wil_err(wil,
 376                         "Connect event corrupted : %d != %d + %d + %d + %d\n",
 377                         len, (int)sizeof(*evt), evt->beacon_ie_len,
 378                         evt->assoc_req_len, evt->assoc_resp_len);
 379                 return;
 380         }
 381         ch = evt->channel + 1;
 382         wil_dbg_wmi(wil, "Connect %pM channel [%d] cid %d\n",
 383                     evt->bssid, ch, evt->cid);
 384         wil_hex_dump_wmi("connect AI : ", DUMP_PREFIX_OFFSET, 16, 1,
 385                          evt->assoc_info, len - sizeof(*evt), true);
 386
 387         /* figure out IE's */
 388         assoc_req_ie = &evt->assoc_info[evt->beacon_ie_len +
 389                                         assoc_req_ie_offset];
 390         assoc_req_ielen = evt->assoc_req_len - assoc_req_ie_offset;
 391         if (evt->assoc_req_len <= assoc_req_ie_offset) {
 392                 assoc_req_ie = NULL;
 393                 assoc_req_ielen = 0;
 394         }
 395
 396         assoc_resp_ie = &evt->assoc_info[evt->beacon_ie_len +
 397                                          evt->assoc_req_len +
 398                                          assoc_resp_ie_offset];
 399         assoc_resp_ielen = evt->assoc_resp_len - assoc_resp_ie_offset;
 400         if (evt->assoc_resp_len <= assoc_resp_ie_offset) {
 401                 assoc_resp_ie = NULL;
 402                 assoc_resp_ielen = 0;
 403         }
 404
 405         if ((wdev->iftype == NL80211_IFTYPE_STATION) ||
 406             (wdev->iftype == NL80211_IFTYPE_P2P_CLIENT)) {
 407                 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
 408                         wil_err(wil, "Not in connecting state\n");
 409                         return;
 410                 }
 411                 del_timer_sync(&wil->connect_timer);
 412                 cfg80211_connect_result(ndev, evt->bssid,
 413                                         assoc_req_ie, assoc_req_ielen,
 414                                         assoc_resp_ie, assoc_resp_ielen,
 415                                         WLAN_STATUS_SUCCESS, GFP_KERNEL);
 416
 417         } else if ((wdev->iftype == NL80211_IFTYPE_AP) ||
 418                    (wdev->iftype == NL80211_IFTYPE_P2P_GO)) {
 419                 memset(&sinfo, 0, sizeof(sinfo));
 420
 421                 sinfo.generation = wil->sinfo_gen++;
 422
 423                 if (assoc_req_ie) {
 424                         sinfo.assoc_req_ies = assoc_req_ie;
 425                         sinfo.assoc_req_ies_len = assoc_req_ielen;
 426                         sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
 427                 }
 428
 429                 cfg80211_new_sta(ndev, evt->bssid, &sinfo, GFP_KERNEL);
 430         }
 431         set_bit(wil_status_fwconnected, &wil->status);
 432
 433         /* FIXME FW can transmit only ucast frames to peer */
 434         /* FIXME real ring_id instead of hard coded 0 */
 435         memcpy(wil->dst_addr[0], evt->bssid, ETH_ALEN);
 436
 437         wil->pending_connect_cid = evt->cid;
 438         queue_work(wil->wmi_wq_conn, &wil->connect_worker);
 439 }
 440
 441 static void wmi_evt_disconnect(struct wil6210_priv *wil, int id,
 442                                void *d, int len)
 443 {
 444         struct wmi_disconnect_event *evt = d;
 445
 446         wil_dbg_wmi(wil, "Disconnect %pM reason %d proto %d wmi\n",
 447                     evt->bssid,
 448                     evt->protocol_reason_status, evt->disconnect_reason);
 449
 450         wil->sinfo_gen++;
 451
 452         wil6210_disconnect(wil, evt->bssid);
 453 }
 454
 455 static void wmi_evt_notify(struct wil6210_priv *wil, int id, void *d, int len)
 456 {
 457         struct wmi_notify_req_done_event *evt = d;
 458
 459         if (len < sizeof(*evt)) {
 460                 wil_err(wil, "Short NOTIFY event\n");
 461                 return;
 462         }
 463
 464         wil->stats.tsf = le64_to_cpu(evt->tsf);
 465         wil->stats.snr = le32_to_cpu(evt->snr_val);
 466         wil->stats.bf_mcs = le16_to_cpu(evt->bf_mcs);
 467         wil->stats.my_rx_sector = le16_to_cpu(evt->my_rx_sector);
 468         wil->stats.my_tx_sector = le16_to_cpu(evt->my_tx_sector);
 469         wil->stats.peer_rx_sector = le16_to_cpu(evt->other_rx_sector);
 470         wil->stats.peer_tx_sector = le16_to_cpu(evt->other_tx_sector);
 471         wil_dbg_wmi(wil, "Link status, MCS %d TSF 0x%016llx\n"
 472                     "BF status 0x%08x SNR 0x%08x\n"
 473                     "Tx Tpt %d goodput %d Rx goodput %d\n"
 474                     "Sectors(rx:tx) my %d:%d peer %d:%d\n",
 475                     wil->stats.bf_mcs, wil->stats.tsf, evt->status,
 476                     wil->stats.snr, le32_to_cpu(evt->tx_tpt),
 477                     le32_to_cpu(evt->tx_goodput), le32_to_cpu(evt->rx_goodput),
 478                     wil->stats.my_rx_sector, wil->stats.my_tx_sector,
 479                     wil->stats.peer_rx_sector, wil->stats.peer_tx_sector);
 480 }
 481
 482 /*
 483  * Firmware reports EAPOL frame using WME event.
 484  * Reconstruct Ethernet frame and deliver it via normal Rx
 485  */
 486 static void wmi_evt_eapol_rx(struct wil6210_priv *wil, int id,
 487                              void *d, int len)
 488 {
 489         struct net_device *ndev = wil_to_ndev(wil);
 490         struct wmi_eapol_rx_event *evt = d;
 491         u16 eapol_len = le16_to_cpu(evt->eapol_len);
 492         int sz = eapol_len + ETH_HLEN;
 493         struct sk_buff *skb;
 494         struct ethhdr *eth;
 495
 496         wil_dbg_wmi(wil, "EAPOL len %d from %pM\n", eapol_len,
 497                     evt->src_mac);
 498
 499         if (eapol_len > 196) { /* TODO: revisit size limit */
 500                 wil_err(wil, "EAPOL too large\n");
 501                 return;
 502         }
 503
 504         skb = alloc_skb(sz, GFP_KERNEL);
 505         if (!skb) {
 506                 wil_err(wil, "Failed to allocate skb\n");
 507                 return;
 508         }
 509         eth = (struct ethhdr *)skb_put(skb, ETH_HLEN);
 510         memcpy(eth->h_dest, ndev->dev_addr, ETH_ALEN);
 511         memcpy(eth->h_source, evt->src_mac, ETH_ALEN);
 512         eth->h_proto = cpu_to_be16(ETH_P_PAE);
 513         memcpy(skb_put(skb, eapol_len), evt->eapol, eapol_len);
 514         skb->protocol = eth_type_trans(skb, ndev);
 515         if (likely(netif_rx_ni(skb) == NET_RX_SUCCESS)) {
 516                 ndev->stats.rx_packets++;
 517                 ndev->stats.rx_bytes += skb->len;
 518         } else {
 519                 ndev->stats.rx_dropped++;
 520         }
 521 }
 522
 523 static void wmi_evt_linkup(struct wil6210_priv *wil, int id, void *d, int len)
 524 {
 525         struct net_device *ndev = wil_to_ndev(wil);
 526         struct wmi_data_port_open_event *evt = d;
 527
 528         wil_dbg_wmi(wil, "Link UP for CID %d\n", evt->cid);
 529
 530         netif_carrier_on(ndev);
 531 }
 532
 533 static void wmi_evt_linkdown(struct wil6210_priv *wil, int id, void *d, int len)
 534 {
 535         struct net_device *ndev = wil_to_ndev(wil);
 536         struct wmi_wbe_link_down_event *evt = d;
 537
 538         wil_dbg_wmi(wil, "Link DOWN for CID %d, reason %d\n",
 539                     evt->cid, le32_to_cpu(evt->reason));
 540
 541         netif_carrier_off(ndev);
 542 }
 543
 544 static void wmi_evt_ba_status(struct wil6210_priv *wil, int id, void *d,
 545                               int len)
 546 {
 547         struct wmi_vring_ba_status_event *evt = d;
 548
 549         wil_dbg_wmi(wil, "BACK[%d] %s {%d} timeout %d\n",
 550                     evt->ringid, evt->status ? "N/A" : "OK", evt->agg_wsize,
 551                     __le16_to_cpu(evt->ba_timeout));
 552 }
 553
 554 static const struct {
 555         int eventid;
 556         void (*handler)(struct wil6210_priv *wil, int eventid,
 557                         void *data, int data_len);
 558 } wmi_evt_handlers[] = {
 559         {WMI_READY_EVENTID,             wmi_evt_ready},
 560         {WMI_FW_READY_EVENTID,          wmi_evt_fw_ready},
 561         {WMI_RX_MGMT_PACKET_EVENTID,    wmi_evt_rx_mgmt},
 562         {WMI_SCAN_COMPLETE_EVENTID,     wmi_evt_scan_complete},
 563         {WMI_CONNECT_EVENTID,           wmi_evt_connect},
 564         {WMI_DISCONNECT_EVENTID,        wmi_evt_disconnect},
 565         {WMI_NOTIFY_REQ_DONE_EVENTID,   wmi_evt_notify},
 566         {WMI_EAPOL_RX_EVENTID,          wmi_evt_eapol_rx},
 567         {WMI_DATA_PORT_OPEN_EVENTID,    wmi_evt_linkup},
 568         {WMI_WBE_LINKDOWN_EVENTID,      wmi_evt_linkdown},
 569         {WMI_BA_STATUS_EVENTID,         wmi_evt_ba_status},
 570 };
 571
 572 /*
 573  * Run in IRQ context
 574  * Extract WMI command from mailbox. Queue it to the @wil->pending_wmi_ev
 575  * that will be eventually handled by the @wmi_event_worker in the thread
 576  * context of thread "wil6210_wmi"
 577  */
 578 void wmi_recv_cmd(struct wil6210_priv *wil)
 579 {
 580         struct wil6210_mbox_ring_desc d_tail;
 581         struct wil6210_mbox_hdr hdr;
 582         struct wil6210_mbox_ring *r = &wil->mbox_ctl.rx;
 583         struct pending_wmi_event *evt;
 584         u8 *cmd;
 585         void __iomem *src;
 586         ulong flags;
 587
 588         for (;;) {
 589                 u16 len;
 590
 591                 r->head = ioread32(wil->csr + HOST_MBOX +
 592                                    offsetof(struct wil6210_mbox_ctl, rx.head));
 593                 if (r->tail == r->head)
 594                         return;
 595
 596                 /* read cmd from tail */
 597                 wil_memcpy_fromio_32(&d_tail, wil->csr + HOSTADDR(r->tail),
 598                                      sizeof(struct wil6210_mbox_ring_desc));
 599                 if (d_tail.sync == 0) {
 600                         wil_err(wil, "Mbox evt not owned by FW?\n");
 601                         return;
 602                 }
 603
 604                 if (0 != wmi_read_hdr(wil, d_tail.addr, &hdr)) {
 605                         wil_err(wil, "Mbox evt at 0x%08x?\n",
 606                                 le32_to_cpu(d_tail.addr));
 607                         return;
 608                 }
 609
 610                 len = le16_to_cpu(hdr.len);
 611                 src = wmi_buffer(wil, d_tail.addr) +
 612                       sizeof(struct wil6210_mbox_hdr);
 613                 evt = kmalloc(ALIGN(offsetof(struct pending_wmi_event,
 614                                              event.wmi) + len, 4),
 615                               GFP_KERNEL);
 616                 if (!evt)
 617                         return;
 618
 619                 evt->event.hdr = hdr;
 620                 cmd = (void *)&evt->event.wmi;
 621                 wil_memcpy_fromio_32(cmd, src, len);
 622                 /* mark entry as empty */
 623                 iowrite32(0, wil->csr + HOSTADDR(r->tail) +
 624                           offsetof(struct wil6210_mbox_ring_desc, sync));
 625                 /* indicate */
 626                 wil_dbg_wmi(wil, "Mbox evt %04x %04x %04x %02x\n",
 627                             le16_to_cpu(hdr.seq), len, le16_to_cpu(hdr.type),
 628                             hdr.flags);
 629                 if ((hdr.type == WIL_MBOX_HDR_TYPE_WMI) &&
 630                     (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 631                         wil_dbg_wmi(wil, "WMI event 0x%04x\n",
 632                                     evt->event.wmi.id);
 633                 }
 634                 wil_hex_dump_wmi("evt ", DUMP_PREFIX_OFFSET, 16, 1,
 635                                  &evt->event.hdr, sizeof(hdr) + len, true);
 636
 637                 /* advance tail */
 638                 r->tail = r->base + ((r->tail - r->base +
 639                           sizeof(struct wil6210_mbox_ring_desc)) % r->size);
 640                 iowrite32(r->tail, wil->csr + HOST_MBOX +
 641                           offsetof(struct wil6210_mbox_ctl, rx.tail));
 642
 643                 /* add to the pending list */
 644                 spin_lock_irqsave(&wil->wmi_ev_lock, flags);
 645                 list_add_tail(&evt->list, &wil->pending_wmi_ev);
 646                 spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
 647                 {
 648                         int q = queue_work(wil->wmi_wq,
 649                                            &wil->wmi_event_worker);
 650                         wil_dbg_wmi(wil, "queue_work -> %d\n", q);
 651                 }
 652         }
 653 }
 654
 655 int wmi_call(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len,
 656              u16 reply_id, void *reply, u8 reply_size, int to_msec)
 657 {
 658         int rc;
 659         int remain;
 660
 661         mutex_lock(&wil->wmi_mutex);
 662
 663         rc = __wmi_send(wil, cmdid, buf, len);
 664         if (rc)
 665                 goto out;
 666
 667         wil->reply_id = reply_id;
 668         wil->reply_buf = reply;
 669         wil->reply_size = reply_size;
 670         remain = wait_for_completion_timeout(&wil->wmi_ready,
 671                         msecs_to_jiffies(to_msec));
 672         if (0 == remain) {
 673                 wil_err(wil, "wmi_call(0x%04x->0x%04x) timeout %d msec\n",
 674                         cmdid, reply_id, to_msec);
 675                 rc = -ETIME;
 676         } else {
 677                 wil_dbg_wmi(wil,
 678                             "wmi_call(0x%04x->0x%04x) completed in %d msec\n",
 679                             cmdid, reply_id,
 680                             to_msec - jiffies_to_msecs(remain));
 681         }
 682         wil->reply_id = 0;
 683         wil->reply_buf = NULL;
 684         wil->reply_size = 0;
 685  out:
 686         mutex_unlock(&wil->wmi_mutex);
 687
 688         return rc;
 689 }
 690
 691 int wmi_echo(struct wil6210_priv *wil)
 692 {
 693         struct wmi_echo_cmd cmd = {
 694                 .value = cpu_to_le32(0x12345678),
 695         };
 696
 697         return wmi_call(wil, WMI_ECHO_CMDID, &cmd, sizeof(cmd),
 698                          WMI_ECHO_RSP_EVENTID, NULL, 0, 20);
 699 }
 700
 701 int wmi_set_mac_address(struct wil6210_priv *wil, void *addr)
 702 {
 703         struct wmi_set_mac_address_cmd cmd;
 704
 705         memcpy(cmd.mac, addr, ETH_ALEN);
 706
 707         wil_dbg_wmi(wil, "Set MAC %pM\n", addr);
 708
 709         return wmi_send(wil, WMI_SET_MAC_ADDRESS_CMDID, &cmd, sizeof(cmd));
 710 }
 711
 712 int wmi_set_bcon(struct wil6210_priv *wil, int bi, u8 wmi_nettype)
 713 {
 714         struct wmi_bcon_ctrl_cmd cmd = {
 715                 .bcon_interval = cpu_to_le16(bi),
 716                 .network_type = wmi_nettype,
 717                 .disable_sec_offload = 1,
 718         };
 719
 720         if (!wil->secure_pcp)
 721                 cmd.disable_sec = 1;
 722
 723         return wmi_send(wil, WMI_BCON_CTRL_CMDID, &cmd, sizeof(cmd));
 724 }
 725
 726 int wmi_set_ssid(struct wil6210_priv *wil, u8 ssid_len, const void *ssid)
 727 {
 728         struct wmi_set_ssid_cmd cmd = {
 729                 .ssid_len = cpu_to_le32(ssid_len),
 730         };
 731
 732         if (ssid_len > sizeof(cmd.ssid))
 733                 return -EINVAL;
 734
 735         memcpy(cmd.ssid, ssid, ssid_len);
 736
 737         return wmi_send(wil, WMI_SET_SSID_CMDID, &cmd, sizeof(cmd));
 738 }
 739
 740 int wmi_get_ssid(struct wil6210_priv *wil, u8 *ssid_len, void *ssid)
 741 {
 742         int rc;
 743         struct {
 744                 struct wil6210_mbox_hdr_wmi wmi;
 745                 struct wmi_set_ssid_cmd cmd;
 746         } __packed reply;
 747         int len; /* reply.cmd.ssid_len in CPU order */
 748
 749         rc = wmi_call(wil, WMI_GET_SSID_CMDID, NULL, 0, WMI_GET_SSID_EVENTID,
 750                       &reply, sizeof(reply), 20);
 751         if (rc)
 752                 return rc;
 753
 754         len = le32_to_cpu(reply.cmd.ssid_len);
 755         if (len > sizeof(reply.cmd.ssid))
 756                 return -EINVAL;
 757
 758         *ssid_len = len;
 759         memcpy(ssid, reply.cmd.ssid, len);
 760
 761         return 0;
 762 }
 763
 764 int wmi_set_channel(struct wil6210_priv *wil, int channel)
 765 {
 766         struct wmi_set_pcp_channel_cmd cmd = {
 767                 .channel = channel - 1,
 768         };
 769
 770         return wmi_send(wil, WMI_SET_PCP_CHANNEL_CMDID, &cmd, sizeof(cmd));
 771 }
 772
 773 int wmi_get_channel(struct wil6210_priv *wil, int *channel)
 774 {
 775         int rc;
 776         struct {
 777                 struct wil6210_mbox_hdr_wmi wmi;
 778                 struct wmi_set_pcp_channel_cmd cmd;
 779         } __packed reply;
 780
 781         rc = wmi_call(wil, WMI_GET_PCP_CHANNEL_CMDID, NULL, 0,
 782                       WMI_GET_PCP_CHANNEL_EVENTID, &reply, sizeof(reply), 20);
 783         if (rc)
 784                 return rc;
 785
 786         if (reply.cmd.channel > 3)
 787                 return -EINVAL;
 788
 789         *channel = reply.cmd.channel + 1;
 790
 791         return 0;
 792 }
 793
 794 int wmi_tx_eapol(struct wil6210_priv *wil, struct sk_buff *skb)
 795 {
 796         struct wmi_eapol_tx_cmd *cmd;
 797         struct ethhdr *eth;
 798         u16 eapol_len = skb->len - ETH_HLEN;
 799         void *eapol = skb->data + ETH_HLEN;
 800         uint i;
 801         int rc;
 802
 803         skb_set_mac_header(skb, 0);
 804         eth = eth_hdr(skb);
 805         wil_dbg_wmi(wil, "EAPOL %d bytes to %pM\n", eapol_len, eth->h_dest);
 806         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 807                 if (memcmp(wil->dst_addr[i], eth->h_dest, ETH_ALEN) == 0)
 808                         goto found_dest;
 809         }
 810
 811         return -EINVAL;
 812
 813  found_dest:
 814         /* find out eapol data & len */
 815         cmd = kzalloc(sizeof(*cmd) + eapol_len, GFP_KERNEL);
 816         if (!cmd)
 817                 return -EINVAL;
 818
 819         memcpy(cmd->dst_mac, eth->h_dest, ETH_ALEN);
 820         cmd->eapol_len = cpu_to_le16(eapol_len);
 821         memcpy(cmd->eapol, eapol, eapol_len);
 822         rc = wmi_send(wil, WMI_EAPOL_TX_CMDID, cmd, sizeof(*cmd) + eapol_len);
 823         kfree(cmd);
 824
 825         return rc;
 826 }
 827
 828 int wmi_del_cipher_key(struct wil6210_priv *wil, u8 key_index,
 829                        const void *mac_addr)
 830 {
 831         struct wmi_delete_cipher_key_cmd cmd = {
 832                 .key_index = key_index,
 833         };
 834
 835         if (mac_addr)
 836                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 837
 838         return wmi_send(wil, WMI_DELETE_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 839 }
 840
 841 int wmi_add_cipher_key(struct wil6210_priv *wil, u8 key_index,
 842                        const void *mac_addr, int key_len, const void *key)
 843 {
 844         struct wmi_add_cipher_key_cmd cmd = {
 845                 .key_index = key_index,
 846                 .key_usage = WMI_KEY_USE_PAIRWISE,
 847                 .key_len = key_len,
 848         };
 849
 850         if (!key || (key_len > sizeof(cmd.key)))
 851                 return -EINVAL;
 852
 853         memcpy(cmd.key, key, key_len);
 854         if (mac_addr)
 855                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 856
 857         return wmi_send(wil, WMI_ADD_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 858 }
 859
 860 int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie)
 861 {
 862         int rc;
 863         u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len;
 864         struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL);
 865         if (!cmd)
 866                 return -ENOMEM;
 867
 868         cmd->mgmt_frm_type = type;
 869         /* BUG: FW API define ieLen as u8. Will fix FW */
 870         cmd->ie_len = cpu_to_le16(ie_len);
 871         memcpy(cmd->ie_info, ie, ie_len);
 872         rc = wmi_send(wil, WMI_SET_APPIE_CMDID, cmd, len);
 873         kfree(cmd);
 874
 875         return rc;
 876 }
 877
 878 int wmi_rx_chain_add(struct wil6210_priv *wil, struct vring *vring)
 879 {
 880         struct wireless_dev *wdev = wil->wdev;
 881         struct net_device *ndev = wil_to_ndev(wil);
 882         struct wmi_cfg_rx_chain_cmd cmd = {
 883                 .action = WMI_RX_CHAIN_ADD,
 884                 .rx_sw_ring = {
 885                         .max_mpdu_size = cpu_to_le16(RX_BUF_LEN),
 886                         .ring_mem_base = cpu_to_le64(vring->pa),
 887                         .ring_size = cpu_to_le16(vring->size),
 888                 },
 889                 .mid = 0, /* TODO - what is it? */
 890                 .decap_trans_type = WMI_DECAP_TYPE_802_3,
 891         };
 892         struct {
 893                 struct wil6210_mbox_hdr_wmi wmi;
 894                 struct wmi_cfg_rx_chain_done_event evt;
 895         } __packed evt;
 896         int rc;
 897
 898         if (wdev->iftype == NL80211_IFTYPE_MONITOR) {
 899                 struct ieee80211_channel *ch = wdev->preset_chandef.chan;
 900
 901                 cmd.sniffer_cfg.mode = cpu_to_le32(WMI_SNIFFER_ON);
 902                 if (ch)
 903                         cmd.sniffer_cfg.channel = ch->hw_value - 1;
 904                 cmd.sniffer_cfg.phy_info_mode =
 905                         cpu_to_le32(ndev->type == ARPHRD_IEEE80211_RADIOTAP);
 906                 cmd.sniffer_cfg.phy_support =
 907                         cpu_to_le32((wil->monitor_flags & MONITOR_FLAG_CONTROL)
 908                                     ? WMI_SNIFFER_CP : WMI_SNIFFER_DP);
 909         }
 910         /* typical time for secure PCP is 840ms */
 911         rc = wmi_call(wil, WMI_CFG_RX_CHAIN_CMDID, &cmd, sizeof(cmd),
 912                       WMI_CFG_RX_CHAIN_DONE_EVENTID, &evt, sizeof(evt), 2000);
 913         if (rc)
 914                 return rc;
 915
 916         vring->hwtail = le32_to_cpu(evt.evt.rx_ring_tail_ptr);
 917
 918         wil_dbg_misc(wil, "Rx init: status %d tail 0x%08x\n",
 919                      le32_to_cpu(evt.evt.status), vring->hwtail);
 920
 921         if (le32_to_cpu(evt.evt.status) != WMI_CFG_RX_CHAIN_SUCCESS)
 922                 rc = -EINVAL;
 923
 924         return rc;
 925 }
 926
 927 void wmi_event_flush(struct wil6210_priv *wil)
 928 {
 929         struct pending_wmi_event *evt, *t;
 930
 931         wil_dbg_wmi(wil, "%s()\n", __func__);
 932
 933         list_for_each_entry_safe(evt, t, &wil->pending_wmi_ev, list) {
 934                 list_del(&evt->list);
 935                 kfree(evt);
 936         }
 937 }
 938
 939 static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id,
 940                                  void *d, int len)
 941 {
 942         uint i;
 943
 944         for (i = 0; i < ARRAY_SIZE(wmi_evt_handlers); i++) {
 945                 if (wmi_evt_handlers[i].eventid == id) {
 946                         wmi_evt_handlers[i].handler(wil, id, d, len);
 947                         return true;
 948                 }
 949         }
 950
 951         return false;
 952 }
 953
 954 static void wmi_event_handle(struct wil6210_priv *wil,
 955                              struct wil6210_mbox_hdr *hdr)
 956 {
 957         u16 len = le16_to_cpu(hdr->len);
 958
 959         if ((hdr->type == WIL_MBOX_HDR_TYPE_WMI) &&
 960             (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 961                 struct wil6210_mbox_hdr_wmi *wmi = (void *)(&hdr[1]);
 962                 void *evt_data = (void *)(&wmi[1]);
 963                 u16 id = le16_to_cpu(wmi->id);
 964                 /* check if someone waits for this event */
 965                 if (wil->reply_id && wil->reply_id == id) {
 966                         if (wil->reply_buf) {
 967                                 memcpy(wil->reply_buf, wmi,
 968                                        min(len, wil->reply_size));
 969                         } else {
 970                                 wmi_evt_call_handler(wil, id, evt_data,
 971                                                      len - sizeof(*wmi));
 972                         }
 973                         wil_dbg_wmi(wil, "Complete WMI 0x%04x\n", id);
 974                         complete(&wil->wmi_ready);
 975                         return;
 976                 }
 977                 /* unsolicited event */
 978                 /* search for handler */
 979                 if (!wmi_evt_call_handler(wil, id, evt_data,
 980                                           len - sizeof(*wmi))) {
 981                         wil_err(wil, "Unhandled event 0x%04x\n", id);
 982                 }
 983         } else {
 984                 wil_err(wil, "Unknown event type\n");
 985                 print_hex_dump(KERN_ERR, "evt?? ", DUMP_PREFIX_OFFSET, 16, 1,
 986                                hdr, sizeof(*hdr) + len, true);
 987         }
 988 }
 989
 990 /*
 991  * Retrieve next WMI event from the pending list
 992  */
 993 static struct list_head *next_wmi_ev(struct wil6210_priv *wil)
 994 {
 995         ulong flags;
 996         struct list_head *ret = NULL;
 997
 998         spin_lock_irqsave(&wil->wmi_ev_lock, flags);
 999
1000         if (!list_empty(&wil->pending_wmi_ev)) {
1001                 ret = wil->pending_wmi_ev.next;
1002                 list_del(ret);
1003         }
1004
1005         spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
1006
1007         return ret;
1008 }
1009
1010 /*
1011  * Handler for the WMI events
1012  */
1013 void wmi_event_worker(struct work_struct *work)
1014 {
1015         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
1016                                                  wmi_event_worker);
1017         struct pending_wmi_event *evt;
1018         struct list_head *lh;
1019
1020         while ((lh = next_wmi_ev(wil)) != NULL) {
1021                 evt = list_entry(lh, struct pending_wmi_event, list);
1022                 wmi_event_handle(wil, &evt->event.hdr);
1023                 kfree(evt);
1024         }
1025 }