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         } else {
 338                 cfg80211_rx_mgmt(wil->wdev, freq, signal,
 339                                  (void *)rx_mgmt_frame, d_len, GFP_KERNEL);
 340         }
 341 }
 342
 343 static void wmi_evt_scan_complete(struct wil6210_priv *wil, int id,
 344                                   void *d, int len)
 345 {
 346         if (wil->scan_request) {
 347                 struct wmi_scan_complete_event *data = d;
 348                 bool aborted = (data->status != 0);
 349
 350                 wil_dbg_wmi(wil, "SCAN_COMPLETE(0x%08x)\n", data->status);
 351                 cfg80211_scan_done(wil->scan_request, aborted);
 352                 wil->scan_request = NULL;
 353         } else {
 354                 wil_err(wil, "SCAN_COMPLETE while not scanning\n");
 355         }
 356 }
 357
 358 static void wmi_evt_connect(struct wil6210_priv *wil, int id, void *d, int len)
 359 {
 360         struct net_device *ndev = wil_to_ndev(wil);
 361         struct wireless_dev *wdev = wil->wdev;
 362         struct wmi_connect_event *evt = d;
 363         int ch; /* channel number */
 364         struct station_info sinfo;
 365         u8 *assoc_req_ie, *assoc_resp_ie;
 366         size_t assoc_req_ielen, assoc_resp_ielen;
 367         /* capinfo(u16) + listen_interval(u16) + IEs */
 368         const size_t assoc_req_ie_offset = sizeof(u16) * 2;
 369         /* capinfo(u16) + status_code(u16) + associd(u16) + IEs */
 370         const size_t assoc_resp_ie_offset = sizeof(u16) * 3;
 371
 372         if (len < sizeof(*evt)) {
 373                 wil_err(wil, "Connect event too short : %d bytes\n", len);
 374                 return;
 375         }
 376         if (len != sizeof(*evt) + evt->beacon_ie_len + evt->assoc_req_len +
 377                    evt->assoc_resp_len) {
 378                 wil_err(wil,
 379                         "Connect event corrupted : %d != %d + %d + %d + %d\n",
 380                         len, (int)sizeof(*evt), evt->beacon_ie_len,
 381                         evt->assoc_req_len, evt->assoc_resp_len);
 382                 return;
 383         }
 384         ch = evt->channel + 1;
 385         wil_dbg_wmi(wil, "Connect %pM channel [%d] cid %d\n",
 386                     evt->bssid, ch, evt->cid);
 387         wil_hex_dump_wmi("connect AI : ", DUMP_PREFIX_OFFSET, 16, 1,
 388                          evt->assoc_info, len - sizeof(*evt), true);
 389
 390         /* figure out IE's */
 391         assoc_req_ie = &evt->assoc_info[evt->beacon_ie_len +
 392                                         assoc_req_ie_offset];
 393         assoc_req_ielen = evt->assoc_req_len - assoc_req_ie_offset;
 394         if (evt->assoc_req_len <= assoc_req_ie_offset) {
 395                 assoc_req_ie = NULL;
 396                 assoc_req_ielen = 0;
 397         }
 398
 399         assoc_resp_ie = &evt->assoc_info[evt->beacon_ie_len +
 400                                          evt->assoc_req_len +
 401                                          assoc_resp_ie_offset];
 402         assoc_resp_ielen = evt->assoc_resp_len - assoc_resp_ie_offset;
 403         if (evt->assoc_resp_len <= assoc_resp_ie_offset) {
 404                 assoc_resp_ie = NULL;
 405                 assoc_resp_ielen = 0;
 406         }
 407
 408         if ((wdev->iftype == NL80211_IFTYPE_STATION) ||
 409             (wdev->iftype == NL80211_IFTYPE_P2P_CLIENT)) {
 410                 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
 411                         wil_err(wil, "Not in connecting state\n");
 412                         return;
 413                 }
 414                 del_timer_sync(&wil->connect_timer);
 415                 cfg80211_connect_result(ndev, evt->bssid,
 416                                         assoc_req_ie, assoc_req_ielen,
 417                                         assoc_resp_ie, assoc_resp_ielen,
 418                                         WLAN_STATUS_SUCCESS, GFP_KERNEL);
 419
 420         } else if ((wdev->iftype == NL80211_IFTYPE_AP) ||
 421                    (wdev->iftype == NL80211_IFTYPE_P2P_GO)) {
 422                 memset(&sinfo, 0, sizeof(sinfo));
 423
 424                 sinfo.generation = wil->sinfo_gen++;
 425
 426                 if (assoc_req_ie) {
 427                         sinfo.assoc_req_ies = assoc_req_ie;
 428                         sinfo.assoc_req_ies_len = assoc_req_ielen;
 429                         sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
 430                 }
 431
 432                 cfg80211_new_sta(ndev, evt->bssid, &sinfo, GFP_KERNEL);
 433         }
 434         set_bit(wil_status_fwconnected, &wil->status);
 435
 436         /* FIXME FW can transmit only ucast frames to peer */
 437         /* FIXME real ring_id instead of hard coded 0 */
 438         memcpy(wil->dst_addr[0], evt->bssid, ETH_ALEN);
 439
 440         wil->pending_connect_cid = evt->cid;
 441         queue_work(wil->wmi_wq_conn, &wil->connect_worker);
 442 }
 443
 444 static void wmi_evt_disconnect(struct wil6210_priv *wil, int id,
 445                                void *d, int len)
 446 {
 447         struct wmi_disconnect_event *evt = d;
 448
 449         wil_dbg_wmi(wil, "Disconnect %pM reason %d proto %d wmi\n",
 450                     evt->bssid,
 451                     evt->protocol_reason_status, evt->disconnect_reason);
 452
 453         wil->sinfo_gen++;
 454
 455         wil6210_disconnect(wil, evt->bssid);
 456 }
 457
 458 static void wmi_evt_notify(struct wil6210_priv *wil, int id, void *d, int len)
 459 {
 460         struct wmi_notify_req_done_event *evt = d;
 461
 462         if (len < sizeof(*evt)) {
 463                 wil_err(wil, "Short NOTIFY event\n");
 464                 return;
 465         }
 466
 467         wil->stats.tsf = le64_to_cpu(evt->tsf);
 468         wil->stats.snr = le32_to_cpu(evt->snr_val);
 469         wil->stats.bf_mcs = le16_to_cpu(evt->bf_mcs);
 470         wil->stats.my_rx_sector = le16_to_cpu(evt->my_rx_sector);
 471         wil->stats.my_tx_sector = le16_to_cpu(evt->my_tx_sector);
 472         wil->stats.peer_rx_sector = le16_to_cpu(evt->other_rx_sector);
 473         wil->stats.peer_tx_sector = le16_to_cpu(evt->other_tx_sector);
 474         wil_dbg_wmi(wil, "Link status, MCS %d TSF 0x%016llx\n"
 475                     "BF status 0x%08x SNR 0x%08x\n"
 476                     "Tx Tpt %d goodput %d Rx goodput %d\n"
 477                     "Sectors(rx:tx) my %d:%d peer %d:%d\n",
 478                     wil->stats.bf_mcs, wil->stats.tsf, evt->status,
 479                     wil->stats.snr, le32_to_cpu(evt->tx_tpt),
 480                     le32_to_cpu(evt->tx_goodput), le32_to_cpu(evt->rx_goodput),
 481                     wil->stats.my_rx_sector, wil->stats.my_tx_sector,
 482                     wil->stats.peer_rx_sector, wil->stats.peer_tx_sector);
 483 }
 484
 485 /*
 486  * Firmware reports EAPOL frame using WME event.
 487  * Reconstruct Ethernet frame and deliver it via normal Rx
 488  */
 489 static void wmi_evt_eapol_rx(struct wil6210_priv *wil, int id,
 490                              void *d, int len)
 491 {
 492         struct net_device *ndev = wil_to_ndev(wil);
 493         struct wmi_eapol_rx_event *evt = d;
 494         u16 eapol_len = le16_to_cpu(evt->eapol_len);
 495         int sz = eapol_len + ETH_HLEN;
 496         struct sk_buff *skb;
 497         struct ethhdr *eth;
 498
 499         wil_dbg_wmi(wil, "EAPOL len %d from %pM\n", eapol_len,
 500                     evt->src_mac);
 501
 502         if (eapol_len > 196) { /* TODO: revisit size limit */
 503                 wil_err(wil, "EAPOL too large\n");
 504                 return;
 505         }
 506
 507         skb = alloc_skb(sz, GFP_KERNEL);
 508         if (!skb) {
 509                 wil_err(wil, "Failed to allocate skb\n");
 510                 return;
 511         }
 512         eth = (struct ethhdr *)skb_put(skb, ETH_HLEN);
 513         memcpy(eth->h_dest, ndev->dev_addr, ETH_ALEN);
 514         memcpy(eth->h_source, evt->src_mac, ETH_ALEN);
 515         eth->h_proto = cpu_to_be16(ETH_P_PAE);
 516         memcpy(skb_put(skb, eapol_len), evt->eapol, eapol_len);
 517         skb->protocol = eth_type_trans(skb, ndev);
 518         if (likely(netif_rx_ni(skb) == NET_RX_SUCCESS)) {
 519                 ndev->stats.rx_packets++;
 520                 ndev->stats.rx_bytes += skb->len;
 521         } else {
 522                 ndev->stats.rx_dropped++;
 523         }
 524 }
 525
 526 static void wmi_evt_linkup(struct wil6210_priv *wil, int id, void *d, int len)
 527 {
 528         struct net_device *ndev = wil_to_ndev(wil);
 529         struct wmi_data_port_open_event *evt = d;
 530
 531         wil_dbg_wmi(wil, "Link UP for CID %d\n", evt->cid);
 532
 533         netif_carrier_on(ndev);
 534 }
 535
 536 static void wmi_evt_linkdown(struct wil6210_priv *wil, int id, void *d, int len)
 537 {
 538         struct net_device *ndev = wil_to_ndev(wil);
 539         struct wmi_wbe_link_down_event *evt = d;
 540
 541         wil_dbg_wmi(wil, "Link DOWN for CID %d, reason %d\n",
 542                     evt->cid, le32_to_cpu(evt->reason));
 543
 544         netif_carrier_off(ndev);
 545 }
 546
 547 static void wmi_evt_ba_status(struct wil6210_priv *wil, int id, void *d,
 548                               int len)
 549 {
 550         struct wmi_vring_ba_status_event *evt = d;
 551
 552         wil_dbg_wmi(wil, "BACK[%d] %s {%d} timeout %d\n",
 553                     evt->ringid, evt->status ? "N/A" : "OK", evt->agg_wsize,
 554                     __le16_to_cpu(evt->ba_timeout));
 555 }
 556
 557 static const struct {
 558         int eventid;
 559         void (*handler)(struct wil6210_priv *wil, int eventid,
 560                         void *data, int data_len);
 561 } wmi_evt_handlers[] = {
 562         {WMI_READY_EVENTID,             wmi_evt_ready},
 563         {WMI_FW_READY_EVENTID,          wmi_evt_fw_ready},
 564         {WMI_RX_MGMT_PACKET_EVENTID,    wmi_evt_rx_mgmt},
 565         {WMI_SCAN_COMPLETE_EVENTID,     wmi_evt_scan_complete},
 566         {WMI_CONNECT_EVENTID,           wmi_evt_connect},
 567         {WMI_DISCONNECT_EVENTID,        wmi_evt_disconnect},
 568         {WMI_NOTIFY_REQ_DONE_EVENTID,   wmi_evt_notify},
 569         {WMI_EAPOL_RX_EVENTID,          wmi_evt_eapol_rx},
 570         {WMI_DATA_PORT_OPEN_EVENTID,    wmi_evt_linkup},
 571         {WMI_WBE_LINKDOWN_EVENTID,      wmi_evt_linkdown},
 572         {WMI_BA_STATUS_EVENTID,         wmi_evt_ba_status},
 573 };
 574
 575 /*
 576  * Run in IRQ context
 577  * Extract WMI command from mailbox. Queue it to the @wil->pending_wmi_ev
 578  * that will be eventually handled by the @wmi_event_worker in the thread
 579  * context of thread "wil6210_wmi"
 580  */
 581 void wmi_recv_cmd(struct wil6210_priv *wil)
 582 {
 583         struct wil6210_mbox_ring_desc d_tail;
 584         struct wil6210_mbox_hdr hdr;
 585         struct wil6210_mbox_ring *r = &wil->mbox_ctl.rx;
 586         struct pending_wmi_event *evt;
 587         u8 *cmd;
 588         void __iomem *src;
 589         ulong flags;
 590
 591         for (;;) {
 592                 u16 len;
 593
 594                 r->head = ioread32(wil->csr + HOST_MBOX +
 595                                    offsetof(struct wil6210_mbox_ctl, rx.head));
 596                 if (r->tail == r->head)
 597                         return;
 598
 599                 /* read cmd from tail */
 600                 wil_memcpy_fromio_32(&d_tail, wil->csr + HOSTADDR(r->tail),
 601                                      sizeof(struct wil6210_mbox_ring_desc));
 602                 if (d_tail.sync == 0) {
 603                         wil_err(wil, "Mbox evt not owned by FW?\n");
 604                         return;
 605                 }
 606
 607                 if (0 != wmi_read_hdr(wil, d_tail.addr, &hdr)) {
 608                         wil_err(wil, "Mbox evt at 0x%08x?\n",
 609                                 le32_to_cpu(d_tail.addr));
 610                         return;
 611                 }
 612
 613                 len = le16_to_cpu(hdr.len);
 614                 src = wmi_buffer(wil, d_tail.addr) +
 615                       sizeof(struct wil6210_mbox_hdr);
 616                 evt = kmalloc(ALIGN(offsetof(struct pending_wmi_event,
 617                                              event.wmi) + len, 4),
 618                               GFP_KERNEL);
 619                 if (!evt)
 620                         return;
 621
 622                 evt->event.hdr = hdr;
 623                 cmd = (void *)&evt->event.wmi;
 624                 wil_memcpy_fromio_32(cmd, src, len);
 625                 /* mark entry as empty */
 626                 iowrite32(0, wil->csr + HOSTADDR(r->tail) +
 627                           offsetof(struct wil6210_mbox_ring_desc, sync));
 628                 /* indicate */
 629                 wil_dbg_wmi(wil, "Mbox evt %04x %04x %04x %02x\n",
 630                             le16_to_cpu(hdr.seq), len, le16_to_cpu(hdr.type),
 631                             hdr.flags);
 632                 if ((hdr.type == WIL_MBOX_HDR_TYPE_WMI) &&
 633                     (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 634                         wil_dbg_wmi(wil, "WMI event 0x%04x\n",
 635                                     evt->event.wmi.id);
 636                 }
 637                 wil_hex_dump_wmi("evt ", DUMP_PREFIX_OFFSET, 16, 1,
 638                                  &evt->event.hdr, sizeof(hdr) + len, true);
 639
 640                 /* advance tail */
 641                 r->tail = r->base + ((r->tail - r->base +
 642                           sizeof(struct wil6210_mbox_ring_desc)) % r->size);
 643                 iowrite32(r->tail, wil->csr + HOST_MBOX +
 644                           offsetof(struct wil6210_mbox_ctl, rx.tail));
 645
 646                 /* add to the pending list */
 647                 spin_lock_irqsave(&wil->wmi_ev_lock, flags);
 648                 list_add_tail(&evt->list, &wil->pending_wmi_ev);
 649                 spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
 650                 {
 651                         int q = queue_work(wil->wmi_wq,
 652                                            &wil->wmi_event_worker);
 653                         wil_dbg_wmi(wil, "queue_work -> %d\n", q);
 654                 }
 655         }
 656 }
 657
 658 int wmi_call(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len,
 659              u16 reply_id, void *reply, u8 reply_size, int to_msec)
 660 {
 661         int rc;
 662         int remain;
 663
 664         mutex_lock(&wil->wmi_mutex);
 665
 666         rc = __wmi_send(wil, cmdid, buf, len);
 667         if (rc)
 668                 goto out;
 669
 670         wil->reply_id = reply_id;
 671         wil->reply_buf = reply;
 672         wil->reply_size = reply_size;
 673         remain = wait_for_completion_timeout(&wil->wmi_ready,
 674                         msecs_to_jiffies(to_msec));
 675         if (0 == remain) {
 676                 wil_err(wil, "wmi_call(0x%04x->0x%04x) timeout %d msec\n",
 677                         cmdid, reply_id, to_msec);
 678                 rc = -ETIME;
 679         } else {
 680                 wil_dbg_wmi(wil,
 681                             "wmi_call(0x%04x->0x%04x) completed in %d msec\n",
 682                             cmdid, reply_id,
 683                             to_msec - jiffies_to_msecs(remain));
 684         }
 685         wil->reply_id = 0;
 686         wil->reply_buf = NULL;
 687         wil->reply_size = 0;
 688  out:
 689         mutex_unlock(&wil->wmi_mutex);
 690
 691         return rc;
 692 }
 693
 694 int wmi_echo(struct wil6210_priv *wil)
 695 {
 696         struct wmi_echo_cmd cmd = {
 697                 .value = cpu_to_le32(0x12345678),
 698         };
 699
 700         return wmi_call(wil, WMI_ECHO_CMDID, &cmd, sizeof(cmd),
 701                          WMI_ECHO_RSP_EVENTID, NULL, 0, 20);
 702 }
 703
 704 int wmi_set_mac_address(struct wil6210_priv *wil, void *addr)
 705 {
 706         struct wmi_set_mac_address_cmd cmd;
 707
 708         memcpy(cmd.mac, addr, ETH_ALEN);
 709
 710         wil_dbg_wmi(wil, "Set MAC %pM\n", addr);
 711
 712         return wmi_send(wil, WMI_SET_MAC_ADDRESS_CMDID, &cmd, sizeof(cmd));
 713 }
 714
 715 int wmi_set_bcon(struct wil6210_priv *wil, int bi, u8 wmi_nettype)
 716 {
 717         struct wmi_bcon_ctrl_cmd cmd = {
 718                 .bcon_interval = cpu_to_le16(bi),
 719                 .network_type = wmi_nettype,
 720                 .disable_sec_offload = 1,
 721         };
 722
 723         if (!wil->secure_pcp)
 724                 cmd.disable_sec = 1;
 725
 726         return wmi_send(wil, WMI_BCON_CTRL_CMDID, &cmd, sizeof(cmd));
 727 }
 728
 729 int wmi_set_ssid(struct wil6210_priv *wil, u8 ssid_len, const void *ssid)
 730 {
 731         struct wmi_set_ssid_cmd cmd = {
 732                 .ssid_len = cpu_to_le32(ssid_len),
 733         };
 734
 735         if (ssid_len > sizeof(cmd.ssid))
 736                 return -EINVAL;
 737
 738         memcpy(cmd.ssid, ssid, ssid_len);
 739
 740         return wmi_send(wil, WMI_SET_SSID_CMDID, &cmd, sizeof(cmd));
 741 }
 742
 743 int wmi_get_ssid(struct wil6210_priv *wil, u8 *ssid_len, void *ssid)
 744 {
 745         int rc;
 746         struct {
 747                 struct wil6210_mbox_hdr_wmi wmi;
 748                 struct wmi_set_ssid_cmd cmd;
 749         } __packed reply;
 750         int len; /* reply.cmd.ssid_len in CPU order */
 751
 752         rc = wmi_call(wil, WMI_GET_SSID_CMDID, NULL, 0, WMI_GET_SSID_EVENTID,
 753                       &reply, sizeof(reply), 20);
 754         if (rc)
 755                 return rc;
 756
 757         len = le32_to_cpu(reply.cmd.ssid_len);
 758         if (len > sizeof(reply.cmd.ssid))
 759                 return -EINVAL;
 760
 761         *ssid_len = len;
 762         memcpy(ssid, reply.cmd.ssid, len);
 763
 764         return 0;
 765 }
 766
 767 int wmi_set_channel(struct wil6210_priv *wil, int channel)
 768 {
 769         struct wmi_set_pcp_channel_cmd cmd = {
 770                 .channel = channel - 1,
 771         };
 772
 773         return wmi_send(wil, WMI_SET_PCP_CHANNEL_CMDID, &cmd, sizeof(cmd));
 774 }
 775
 776 int wmi_get_channel(struct wil6210_priv *wil, int *channel)
 777 {
 778         int rc;
 779         struct {
 780                 struct wil6210_mbox_hdr_wmi wmi;
 781                 struct wmi_set_pcp_channel_cmd cmd;
 782         } __packed reply;
 783
 784         rc = wmi_call(wil, WMI_GET_PCP_CHANNEL_CMDID, NULL, 0,
 785                       WMI_GET_PCP_CHANNEL_EVENTID, &reply, sizeof(reply), 20);
 786         if (rc)
 787                 return rc;
 788
 789         if (reply.cmd.channel > 3)
 790                 return -EINVAL;
 791
 792         *channel = reply.cmd.channel + 1;
 793
 794         return 0;
 795 }
 796
 797 int wmi_tx_eapol(struct wil6210_priv *wil, struct sk_buff *skb)
 798 {
 799         struct wmi_eapol_tx_cmd *cmd;
 800         struct ethhdr *eth;
 801         u16 eapol_len = skb->len - ETH_HLEN;
 802         void *eapol = skb->data + ETH_HLEN;
 803         uint i;
 804         int rc;
 805
 806         skb_set_mac_header(skb, 0);
 807         eth = eth_hdr(skb);
 808         wil_dbg_wmi(wil, "EAPOL %d bytes to %pM\n", eapol_len, eth->h_dest);
 809         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 810                 if (memcmp(wil->dst_addr[i], eth->h_dest, ETH_ALEN) == 0)
 811                         goto found_dest;
 812         }
 813
 814         return -EINVAL;
 815
 816  found_dest:
 817         /* find out eapol data & len */
 818         cmd = kzalloc(sizeof(*cmd) + eapol_len, GFP_KERNEL);
 819         if (!cmd)
 820                 return -EINVAL;
 821
 822         memcpy(cmd->dst_mac, eth->h_dest, ETH_ALEN);
 823         cmd->eapol_len = cpu_to_le16(eapol_len);
 824         memcpy(cmd->eapol, eapol, eapol_len);
 825         rc = wmi_send(wil, WMI_EAPOL_TX_CMDID, cmd, sizeof(*cmd) + eapol_len);
 826         kfree(cmd);
 827
 828         return rc;
 829 }
 830
 831 int wmi_del_cipher_key(struct wil6210_priv *wil, u8 key_index,
 832                        const void *mac_addr)
 833 {
 834         struct wmi_delete_cipher_key_cmd cmd = {
 835                 .key_index = key_index,
 836         };
 837
 838         if (mac_addr)
 839                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 840
 841         return wmi_send(wil, WMI_DELETE_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 842 }
 843
 844 int wmi_add_cipher_key(struct wil6210_priv *wil, u8 key_index,
 845                        const void *mac_addr, int key_len, const void *key)
 846 {
 847         struct wmi_add_cipher_key_cmd cmd = {
 848                 .key_index = key_index,
 849                 .key_usage = WMI_KEY_USE_PAIRWISE,
 850                 .key_len = key_len,
 851         };
 852
 853         if (!key || (key_len > sizeof(cmd.key)))
 854                 return -EINVAL;
 855
 856         memcpy(cmd.key, key, key_len);
 857         if (mac_addr)
 858                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 859
 860         return wmi_send(wil, WMI_ADD_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 861 }
 862
 863 int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie)
 864 {
 865         int rc;
 866         u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len;
 867         struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL);
 868         if (!cmd)
 869                 return -ENOMEM;
 870
 871         cmd->mgmt_frm_type = type;
 872         /* BUG: FW API define ieLen as u8. Will fix FW */
 873         cmd->ie_len = cpu_to_le16(ie_len);
 874         memcpy(cmd->ie_info, ie, ie_len);
 875         rc = wmi_send(wil, WMI_SET_APPIE_CMDID, cmd, len);
 876         kfree(cmd);
 877
 878         return rc;
 879 }
 880
 881 int wmi_rx_chain_add(struct wil6210_priv *wil, struct vring *vring)
 882 {
 883         struct wireless_dev *wdev = wil->wdev;
 884         struct net_device *ndev = wil_to_ndev(wil);
 885         struct wmi_cfg_rx_chain_cmd cmd = {
 886                 .action = WMI_RX_CHAIN_ADD,
 887                 .rx_sw_ring = {
 888                         .max_mpdu_size = cpu_to_le16(RX_BUF_LEN),
 889                         .ring_mem_base = cpu_to_le64(vring->pa),
 890                         .ring_size = cpu_to_le16(vring->size),
 891                 },
 892                 .mid = 0, /* TODO - what is it? */
 893                 .decap_trans_type = WMI_DECAP_TYPE_802_3,
 894         };
 895         struct {
 896                 struct wil6210_mbox_hdr_wmi wmi;
 897                 struct wmi_cfg_rx_chain_done_event evt;
 898         } __packed evt;
 899         int rc;
 900
 901         if (wdev->iftype == NL80211_IFTYPE_MONITOR) {
 902                 struct ieee80211_channel *ch = wdev->preset_chandef.chan;
 903
 904                 cmd.sniffer_cfg.mode = cpu_to_le32(WMI_SNIFFER_ON);
 905                 if (ch)
 906                         cmd.sniffer_cfg.channel = ch->hw_value - 1;
 907                 cmd.sniffer_cfg.phy_info_mode =
 908                         cpu_to_le32(ndev->type == ARPHRD_IEEE80211_RADIOTAP);
 909                 cmd.sniffer_cfg.phy_support =
 910                         cpu_to_le32((wil->monitor_flags & MONITOR_FLAG_CONTROL)
 911                                     ? WMI_SNIFFER_CP : WMI_SNIFFER_DP);
 912         }
 913         /* typical time for secure PCP is 840ms */
 914         rc = wmi_call(wil, WMI_CFG_RX_CHAIN_CMDID, &cmd, sizeof(cmd),
 915                       WMI_CFG_RX_CHAIN_DONE_EVENTID, &evt, sizeof(evt), 2000);
 916         if (rc)
 917                 return rc;
 918
 919         vring->hwtail = le32_to_cpu(evt.evt.rx_ring_tail_ptr);
 920
 921         wil_dbg_misc(wil, "Rx init: status %d tail 0x%08x\n",
 922                      le32_to_cpu(evt.evt.status), vring->hwtail);
 923
 924         if (le32_to_cpu(evt.evt.status) != WMI_CFG_RX_CHAIN_SUCCESS)
 925                 rc = -EINVAL;
 926
 927         return rc;
 928 }
 929
 930 void wmi_event_flush(struct wil6210_priv *wil)
 931 {
 932         struct pending_wmi_event *evt, *t;
 933
 934         wil_dbg_wmi(wil, "%s()\n", __func__);
 935
 936         list_for_each_entry_safe(evt, t, &wil->pending_wmi_ev, list) {
 937                 list_del(&evt->list);
 938                 kfree(evt);
 939         }
 940 }
 941
 942 static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id,
 943                                  void *d, int len)
 944 {
 945         uint i;
 946
 947         for (i = 0; i < ARRAY_SIZE(wmi_evt_handlers); i++) {
 948                 if (wmi_evt_handlers[i].eventid == id) {
 949                         wmi_evt_handlers[i].handler(wil, id, d, len);
 950                         return true;
 951                 }
 952         }
 953
 954         return false;
 955 }
 956
 957 static void wmi_event_handle(struct wil6210_priv *wil,
 958                              struct wil6210_mbox_hdr *hdr)
 959 {
 960         u16 len = le16_to_cpu(hdr->len);
 961
 962         if ((hdr->type == WIL_MBOX_HDR_TYPE_WMI) &&
 963             (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 964                 struct wil6210_mbox_hdr_wmi *wmi = (void *)(&hdr[1]);
 965                 void *evt_data = (void *)(&wmi[1]);
 966                 u16 id = le16_to_cpu(wmi->id);
 967                 /* check if someone waits for this event */
 968                 if (wil->reply_id && wil->reply_id == id) {
 969                         if (wil->reply_buf) {
 970                                 memcpy(wil->reply_buf, wmi,
 971                                        min(len, wil->reply_size));
 972                         } else {
 973                                 wmi_evt_call_handler(wil, id, evt_data,
 974                                                      len - sizeof(*wmi));
 975                         }
 976                         wil_dbg_wmi(wil, "Complete WMI 0x%04x\n", id);
 977                         complete(&wil->wmi_ready);
 978                         return;
 979                 }
 980                 /* unsolicited event */
 981                 /* search for handler */
 982                 if (!wmi_evt_call_handler(wil, id, evt_data,
 983                                           len - sizeof(*wmi))) {
 984                         wil_err(wil, "Unhandled event 0x%04x\n", id);
 985                 }
 986         } else {
 987                 wil_err(wil, "Unknown event type\n");
 988                 print_hex_dump(KERN_ERR, "evt?? ", DUMP_PREFIX_OFFSET, 16, 1,
 989                                hdr, sizeof(*hdr) + len, true);
 990         }
 991 }
 992
 993 /*
 994  * Retrieve next WMI event from the pending list
 995  */
 996 static struct list_head *next_wmi_ev(struct wil6210_priv *wil)
 997 {
 998         ulong flags;
 999         struct list_head *ret = NULL;
1000
1001         spin_lock_irqsave(&wil->wmi_ev_lock, flags);
1002
1003         if (!list_empty(&wil->pending_wmi_ev)) {
1004                 ret = wil->pending_wmi_ev.next;
1005                 list_del(ret);
1006         }
1007
1008         spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
1009
1010         return ret;
1011 }
1012
1013 /*
1014  * Handler for the WMI events
1015  */
1016 void wmi_event_worker(struct work_struct *work)
1017 {
1018         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
1019                                                  wmi_event_worker);
1020         struct pending_wmi_event *evt;
1021         struct list_head *lh;
1022
1023         while ((lh = next_wmi_ev(wil)) != NULL) {
1024                 evt = list_entry(lh, struct pending_wmi_event, list);
1025                 wmi_event_handle(wil, &evt->event.hdr);
1026                 kfree(evt);
1027         }
1028 }