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                 u64 tsf = le64_to_cpu(rx_mgmt_frame->u.beacon.timestamp);
 328                 u16 cap = le16_to_cpu(rx_mgmt_frame->u.beacon.capab_info);
 329                 u16 bi = le16_to_cpu(rx_mgmt_frame->u.beacon.beacon_int);
 330                 const u8 *ie_buf = rx_mgmt_frame->u.beacon.variable;
 331                 size_t ie_len = d_len - offsetof(struct ieee80211_mgmt,
 332                                                  u.beacon.variable);
 333                 wil_dbg_wmi(wil, "Capability info : 0x%04x\n", cap);
 334
 335                 bss = cfg80211_inform_bss(wiphy, channel, rx_mgmt_frame->bssid,
 336                                           tsf, cap, bi, ie_buf, ie_len,
 337                                           signal, GFP_KERNEL);
 338                 if (bss) {
 339                         wil_dbg_wmi(wil, "Added BSS %pM\n",
 340                                     rx_mgmt_frame->bssid);
 341                         cfg80211_put_bss(wiphy, bss);
 342                 } else {
 343                         wil_err(wil, "cfg80211_inform_bss() failed\n");
 344                 }
 345         }
 346 }
 347
 348 static void wmi_evt_scan_complete(struct wil6210_priv *wil, int id,
 349                                   void *d, int len)
 350 {
 351         if (wil->scan_request) {
 352                 struct wmi_scan_complete_event *data = d;
 353                 bool aborted = (data->status != 0);
 354
 355                 wil_dbg_wmi(wil, "SCAN_COMPLETE(0x%08x)\n", data->status);
 356                 cfg80211_scan_done(wil->scan_request, aborted);
 357                 wil->scan_request = NULL;
 358         } else {
 359                 wil_err(wil, "SCAN_COMPLETE while not scanning\n");
 360         }
 361 }
 362
 363 static void wmi_evt_connect(struct wil6210_priv *wil, int id, void *d, int len)
 364 {
 365         struct net_device *ndev = wil_to_ndev(wil);
 366         struct wireless_dev *wdev = wil->wdev;
 367         struct wmi_connect_event *evt = d;
 368         int ch; /* channel number */
 369         struct station_info sinfo;
 370         u8 *assoc_req_ie, *assoc_resp_ie;
 371         size_t assoc_req_ielen, assoc_resp_ielen;
 372         /* capinfo(u16) + listen_interval(u16) + IEs */
 373         const size_t assoc_req_ie_offset = sizeof(u16) * 2;
 374         /* capinfo(u16) + status_code(u16) + associd(u16) + IEs */
 375         const size_t assoc_resp_ie_offset = sizeof(u16) * 3;
 376
 377         if (len < sizeof(*evt)) {
 378                 wil_err(wil, "Connect event too short : %d bytes\n", len);
 379                 return;
 380         }
 381         if (len != sizeof(*evt) + evt->beacon_ie_len + evt->assoc_req_len +
 382                    evt->assoc_resp_len) {
 383                 wil_err(wil,
 384                         "Connect event corrupted : %d != %d + %d + %d + %d\n",
 385                         len, (int)sizeof(*evt), evt->beacon_ie_len,
 386                         evt->assoc_req_len, evt->assoc_resp_len);
 387                 return;
 388         }
 389         ch = evt->channel + 1;
 390         wil_dbg_wmi(wil, "Connect %pM channel [%d] cid %d\n",
 391                     evt->bssid, ch, evt->cid);
 392         wil_hex_dump_wmi("connect AI : ", DUMP_PREFIX_OFFSET, 16, 1,
 393                          evt->assoc_info, len - sizeof(*evt), true);
 394
 395         /* figure out IE's */
 396         assoc_req_ie = &evt->assoc_info[evt->beacon_ie_len +
 397                                         assoc_req_ie_offset];
 398         assoc_req_ielen = evt->assoc_req_len - assoc_req_ie_offset;
 399         if (evt->assoc_req_len <= assoc_req_ie_offset) {
 400                 assoc_req_ie = NULL;
 401                 assoc_req_ielen = 0;
 402         }
 403
 404         assoc_resp_ie = &evt->assoc_info[evt->beacon_ie_len +
 405                                          evt->assoc_req_len +
 406                                          assoc_resp_ie_offset];
 407         assoc_resp_ielen = evt->assoc_resp_len - assoc_resp_ie_offset;
 408         if (evt->assoc_resp_len <= assoc_resp_ie_offset) {
 409                 assoc_resp_ie = NULL;
 410                 assoc_resp_ielen = 0;
 411         }
 412
 413         if ((wdev->iftype == NL80211_IFTYPE_STATION) ||
 414             (wdev->iftype == NL80211_IFTYPE_P2P_CLIENT)) {
 415                 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
 416                         wil_err(wil, "Not in connecting state\n");
 417                         return;
 418                 }
 419                 del_timer_sync(&wil->connect_timer);
 420                 cfg80211_connect_result(ndev, evt->bssid,
 421                                         assoc_req_ie, assoc_req_ielen,
 422                                         assoc_resp_ie, assoc_resp_ielen,
 423                                         WLAN_STATUS_SUCCESS, GFP_KERNEL);
 424
 425         } else if ((wdev->iftype == NL80211_IFTYPE_AP) ||
 426                    (wdev->iftype == NL80211_IFTYPE_P2P_GO)) {
 427                 memset(&sinfo, 0, sizeof(sinfo));
 428
 429                 sinfo.generation = wil->sinfo_gen++;
 430
 431                 if (assoc_req_ie) {
 432                         sinfo.assoc_req_ies = assoc_req_ie;
 433                         sinfo.assoc_req_ies_len = assoc_req_ielen;
 434                         sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
 435                 }
 436
 437                 cfg80211_new_sta(ndev, evt->bssid, &sinfo, GFP_KERNEL);
 438         }
 439         set_bit(wil_status_fwconnected, &wil->status);
 440
 441         /* FIXME FW can transmit only ucast frames to peer */
 442         /* FIXME real ring_id instead of hard coded 0 */
 443         memcpy(wil->dst_addr[0], evt->bssid, ETH_ALEN);
 444
 445         wil->pending_connect_cid = evt->cid;
 446         queue_work(wil->wmi_wq_conn, &wil->wmi_connect_worker);
 447 }
 448
 449 static void wmi_evt_disconnect(struct wil6210_priv *wil, int id,
 450                                void *d, int len)
 451 {
 452         struct wmi_disconnect_event *evt = d;
 453
 454         wil_dbg_wmi(wil, "Disconnect %pM reason %d proto %d wmi\n",
 455                     evt->bssid,
 456                     evt->protocol_reason_status, evt->disconnect_reason);
 457
 458         wil->sinfo_gen++;
 459
 460         wil6210_disconnect(wil, evt->bssid);
 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                         return;
 592
 593                 evt->event.hdr = hdr;
 594                 cmd = (void *)&evt->event.wmi;
 595                 wil_memcpy_fromio_32(cmd, src, len);
 596                 /* mark entry as empty */
 597                 iowrite32(0, wil->csr + HOSTADDR(r->tail) +
 598                           offsetof(struct wil6210_mbox_ring_desc, sync));
 599                 /* indicate */
 600                 wil_dbg_wmi(wil, "Mbox evt %04x %04x %04x %02x\n",
 601                             le16_to_cpu(hdr.seq), len, le16_to_cpu(hdr.type),
 602                             hdr.flags);
 603                 if ((hdr.type == WIL_MBOX_HDR_TYPE_WMI) &&
 604                     (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 605                         wil_dbg_wmi(wil, "WMI event 0x%04x\n",
 606                                     evt->event.wmi.id);
 607                 }
 608                 wil_hex_dump_wmi("evt ", DUMP_PREFIX_OFFSET, 16, 1,
 609                                  &evt->event.hdr, sizeof(hdr) + len, true);
 610
 611                 /* advance tail */
 612                 r->tail = r->base + ((r->tail - r->base +
 613                           sizeof(struct wil6210_mbox_ring_desc)) % r->size);
 614                 iowrite32(r->tail, wil->csr + HOST_MBOX +
 615                           offsetof(struct wil6210_mbox_ctl, rx.tail));
 616
 617                 /* add to the pending list */
 618                 spin_lock_irqsave(&wil->wmi_ev_lock, flags);
 619                 list_add_tail(&evt->list, &wil->pending_wmi_ev);
 620                 spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
 621                 {
 622                         int q = queue_work(wil->wmi_wq,
 623                                            &wil->wmi_event_worker);
 624                         wil_dbg_wmi(wil, "queue_work -> %d\n", q);
 625                 }
 626         }
 627 }
 628
 629 int wmi_call(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len,
 630              u16 reply_id, void *reply, u8 reply_size, int to_msec)
 631 {
 632         int rc;
 633         int remain;
 634
 635         mutex_lock(&wil->wmi_mutex);
 636
 637         rc = __wmi_send(wil, cmdid, buf, len);
 638         if (rc)
 639                 goto out;
 640
 641         wil->reply_id = reply_id;
 642         wil->reply_buf = reply;
 643         wil->reply_size = reply_size;
 644         remain = wait_for_completion_timeout(&wil->wmi_ready,
 645                         msecs_to_jiffies(to_msec));
 646         if (0 == remain) {
 647                 wil_err(wil, "wmi_call(0x%04x->0x%04x) timeout %d msec\n",
 648                         cmdid, reply_id, to_msec);
 649                 rc = -ETIME;
 650         } else {
 651                 wil_dbg_wmi(wil,
 652                             "wmi_call(0x%04x->0x%04x) completed in %d msec\n",
 653                             cmdid, reply_id,
 654                             to_msec - jiffies_to_msecs(remain));
 655         }
 656         wil->reply_id = 0;
 657         wil->reply_buf = NULL;
 658         wil->reply_size = 0;
 659  out:
 660         mutex_unlock(&wil->wmi_mutex);
 661
 662         return rc;
 663 }
 664
 665 int wmi_echo(struct wil6210_priv *wil)
 666 {
 667         struct wmi_echo_cmd cmd = {
 668                 .value = cpu_to_le32(0x12345678),
 669         };
 670
 671         return wmi_call(wil, WMI_ECHO_CMDID, &cmd, sizeof(cmd),
 672                          WMI_ECHO_RSP_EVENTID, NULL, 0, 20);
 673 }
 674
 675 int wmi_set_mac_address(struct wil6210_priv *wil, void *addr)
 676 {
 677         struct wmi_set_mac_address_cmd cmd;
 678
 679         memcpy(cmd.mac, addr, ETH_ALEN);
 680
 681         wil_dbg_wmi(wil, "Set MAC %pM\n", addr);
 682
 683         return wmi_send(wil, WMI_SET_MAC_ADDRESS_CMDID, &cmd, sizeof(cmd));
 684 }
 685
 686 int wmi_set_bcon(struct wil6210_priv *wil, int bi, u8 wmi_nettype)
 687 {
 688         struct wmi_bcon_ctrl_cmd cmd = {
 689                 .bcon_interval = cpu_to_le16(bi),
 690                 .network_type = wmi_nettype,
 691                 .disable_sec_offload = 1,
 692         };
 693
 694         if (!wil->secure_pcp)
 695                 cmd.disable_sec = 1;
 696
 697         return wmi_send(wil, WMI_BCON_CTRL_CMDID, &cmd, sizeof(cmd));
 698 }
 699
 700 int wmi_set_ssid(struct wil6210_priv *wil, u8 ssid_len, const void *ssid)
 701 {
 702         struct wmi_set_ssid_cmd cmd = {
 703                 .ssid_len = cpu_to_le32(ssid_len),
 704         };
 705
 706         if (ssid_len > sizeof(cmd.ssid))
 707                 return -EINVAL;
 708
 709         memcpy(cmd.ssid, ssid, ssid_len);
 710
 711         return wmi_send(wil, WMI_SET_SSID_CMDID, &cmd, sizeof(cmd));
 712 }
 713
 714 int wmi_get_ssid(struct wil6210_priv *wil, u8 *ssid_len, void *ssid)
 715 {
 716         int rc;
 717         struct {
 718                 struct wil6210_mbox_hdr_wmi wmi;
 719                 struct wmi_set_ssid_cmd cmd;
 720         } __packed reply;
 721         int len; /* reply.cmd.ssid_len in CPU order */
 722
 723         rc = wmi_call(wil, WMI_GET_SSID_CMDID, NULL, 0, WMI_GET_SSID_EVENTID,
 724                       &reply, sizeof(reply), 20);
 725         if (rc)
 726                 return rc;
 727
 728         len = le32_to_cpu(reply.cmd.ssid_len);
 729         if (len > sizeof(reply.cmd.ssid))
 730                 return -EINVAL;
 731
 732         *ssid_len = len;
 733         memcpy(ssid, reply.cmd.ssid, len);
 734
 735         return 0;
 736 }
 737
 738 int wmi_set_channel(struct wil6210_priv *wil, int channel)
 739 {
 740         struct wmi_set_pcp_channel_cmd cmd = {
 741                 .channel = channel - 1,
 742         };
 743
 744         return wmi_send(wil, WMI_SET_PCP_CHANNEL_CMDID, &cmd, sizeof(cmd));
 745 }
 746
 747 int wmi_get_channel(struct wil6210_priv *wil, int *channel)
 748 {
 749         int rc;
 750         struct {
 751                 struct wil6210_mbox_hdr_wmi wmi;
 752                 struct wmi_set_pcp_channel_cmd cmd;
 753         } __packed reply;
 754
 755         rc = wmi_call(wil, WMI_GET_PCP_CHANNEL_CMDID, NULL, 0,
 756                       WMI_GET_PCP_CHANNEL_EVENTID, &reply, sizeof(reply), 20);
 757         if (rc)
 758                 return rc;
 759
 760         if (reply.cmd.channel > 3)
 761                 return -EINVAL;
 762
 763         *channel = reply.cmd.channel + 1;
 764
 765         return 0;
 766 }
 767
 768 int wmi_tx_eapol(struct wil6210_priv *wil, struct sk_buff *skb)
 769 {
 770         struct wmi_eapol_tx_cmd *cmd;
 771         struct ethhdr *eth;
 772         u16 eapol_len = skb->len - ETH_HLEN;
 773         void *eapol = skb->data + ETH_HLEN;
 774         uint i;
 775         int rc;
 776
 777         skb_set_mac_header(skb, 0);
 778         eth = eth_hdr(skb);
 779         wil_dbg_wmi(wil, "EAPOL %d bytes to %pM\n", eapol_len, eth->h_dest);
 780         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 781                 if (memcmp(wil->dst_addr[i], eth->h_dest, ETH_ALEN) == 0)
 782                         goto found_dest;
 783         }
 784
 785         return -EINVAL;
 786
 787  found_dest:
 788         /* find out eapol data & len */
 789         cmd = kzalloc(sizeof(*cmd) + eapol_len, GFP_KERNEL);
 790         if (!cmd)
 791                 return -EINVAL;
 792
 793         memcpy(cmd->dst_mac, eth->h_dest, ETH_ALEN);
 794         cmd->eapol_len = cpu_to_le16(eapol_len);
 795         memcpy(cmd->eapol, eapol, eapol_len);
 796         rc = wmi_send(wil, WMI_EAPOL_TX_CMDID, cmd, sizeof(*cmd) + eapol_len);
 797         kfree(cmd);
 798
 799         return rc;
 800 }
 801
 802 int wmi_del_cipher_key(struct wil6210_priv *wil, u8 key_index,
 803                        const void *mac_addr)
 804 {
 805         struct wmi_delete_cipher_key_cmd cmd = {
 806                 .key_index = key_index,
 807         };
 808
 809         if (mac_addr)
 810                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 811
 812         return wmi_send(wil, WMI_DELETE_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 813 }
 814
 815 int wmi_add_cipher_key(struct wil6210_priv *wil, u8 key_index,
 816                        const void *mac_addr, int key_len, const void *key)
 817 {
 818         struct wmi_add_cipher_key_cmd cmd = {
 819                 .key_index = key_index,
 820                 .key_usage = WMI_KEY_USE_PAIRWISE,
 821                 .key_len = key_len,
 822         };
 823
 824         if (!key || (key_len > sizeof(cmd.key)))
 825                 return -EINVAL;
 826
 827         memcpy(cmd.key, key, key_len);
 828         if (mac_addr)
 829                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 830
 831         return wmi_send(wil, WMI_ADD_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 832 }
 833
 834 int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie)
 835 {
 836         int rc;
 837         u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len;
 838         struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL);
 839         if (!cmd)
 840                 return -ENOMEM;
 841
 842         cmd->mgmt_frm_type = type;
 843         /* BUG: FW API define ieLen as u8. Will fix FW */
 844         cmd->ie_len = cpu_to_le16(ie_len);
 845         memcpy(cmd->ie_info, ie, ie_len);
 846         rc = wmi_send(wil, WMI_SET_APPIE_CMDID, &cmd, len);
 847         kfree(cmd);
 848
 849         return rc;
 850 }
 851
 852 int wmi_rx_chain_add(struct wil6210_priv *wil, struct vring *vring)
 853 {
 854         struct wireless_dev *wdev = wil->wdev;
 855         struct net_device *ndev = wil_to_ndev(wil);
 856         struct wmi_cfg_rx_chain_cmd cmd = {
 857                 .action = WMI_RX_CHAIN_ADD,
 858                 .rx_sw_ring = {
 859                         .max_mpdu_size = cpu_to_le16(RX_BUF_LEN),
 860                         .ring_mem_base = cpu_to_le64(vring->pa),
 861                         .ring_size = cpu_to_le16(vring->size),
 862                 },
 863                 .mid = 0, /* TODO - what is it? */
 864                 .decap_trans_type = WMI_DECAP_TYPE_802_3,
 865         };
 866         struct {
 867                 struct wil6210_mbox_hdr_wmi wmi;
 868                 struct wmi_cfg_rx_chain_done_event evt;
 869         } __packed evt;
 870         int rc;
 871
 872         if (wdev->iftype == NL80211_IFTYPE_MONITOR) {
 873                 struct ieee80211_channel *ch = wdev->preset_chandef.chan;
 874
 875                 cmd.sniffer_cfg.mode = cpu_to_le32(WMI_SNIFFER_ON);
 876                 if (ch)
 877                         cmd.sniffer_cfg.channel = ch->hw_value - 1;
 878                 cmd.sniffer_cfg.phy_info_mode =
 879                         cpu_to_le32(ndev->type == ARPHRD_IEEE80211_RADIOTAP);
 880                 cmd.sniffer_cfg.phy_support =
 881                         cpu_to_le32((wil->monitor_flags & MONITOR_FLAG_CONTROL)
 882                                     ? WMI_SNIFFER_CP : WMI_SNIFFER_DP);
 883         }
 884         /* typical time for secure PCP is 840ms */
 885         rc = wmi_call(wil, WMI_CFG_RX_CHAIN_CMDID, &cmd, sizeof(cmd),
 886                       WMI_CFG_RX_CHAIN_DONE_EVENTID, &evt, sizeof(evt), 2000);
 887         if (rc)
 888                 return rc;
 889
 890         vring->hwtail = le32_to_cpu(evt.evt.rx_ring_tail_ptr);
 891
 892         wil_dbg_misc(wil, "Rx init: status %d tail 0x%08x\n",
 893                      le32_to_cpu(evt.evt.status), vring->hwtail);
 894
 895         if (le32_to_cpu(evt.evt.status) != WMI_CFG_RX_CHAIN_SUCCESS)
 896                 rc = -EINVAL;
 897
 898         return rc;
 899 }
 900
 901 void wmi_event_flush(struct wil6210_priv *wil)
 902 {
 903         struct pending_wmi_event *evt, *t;
 904
 905         wil_dbg_wmi(wil, "%s()\n", __func__);
 906
 907         list_for_each_entry_safe(evt, t, &wil->pending_wmi_ev, list) {
 908                 list_del(&evt->list);
 909                 kfree(evt);
 910         }
 911 }
 912
 913 static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id,
 914                                  void *d, int len)
 915 {
 916         uint i;
 917
 918         for (i = 0; i < ARRAY_SIZE(wmi_evt_handlers); i++) {
 919                 if (wmi_evt_handlers[i].eventid == id) {
 920                         wmi_evt_handlers[i].handler(wil, id, d, len);
 921                         return true;
 922                 }
 923         }
 924
 925         return false;
 926 }
 927
 928 static void wmi_event_handle(struct wil6210_priv *wil,
 929                              struct wil6210_mbox_hdr *hdr)
 930 {
 931         u16 len = le16_to_cpu(hdr->len);
 932
 933         if ((hdr->type == WIL_MBOX_HDR_TYPE_WMI) &&
 934             (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 935                 struct wil6210_mbox_hdr_wmi *wmi = (void *)(&hdr[1]);
 936                 void *evt_data = (void *)(&wmi[1]);
 937                 u16 id = le16_to_cpu(wmi->id);
 938                 /* check if someone waits for this event */
 939                 if (wil->reply_id && wil->reply_id == id) {
 940                         if (wil->reply_buf) {
 941                                 memcpy(wil->reply_buf, wmi,
 942                                        min(len, wil->reply_size));
 943                         } else {
 944                                 wmi_evt_call_handler(wil, id, evt_data,
 945                                                      len - sizeof(*wmi));
 946                         }
 947                         wil_dbg_wmi(wil, "Complete WMI 0x%04x\n", id);
 948                         complete(&wil->wmi_ready);
 949                         return;
 950                 }
 951                 /* unsolicited event */
 952                 /* search for handler */
 953                 if (!wmi_evt_call_handler(wil, id, evt_data,
 954                                           len - sizeof(*wmi))) {
 955                         wil_err(wil, "Unhandled event 0x%04x\n", id);
 956                 }
 957         } else {
 958                 wil_err(wil, "Unknown event type\n");
 959                 print_hex_dump(KERN_ERR, "evt?? ", DUMP_PREFIX_OFFSET, 16, 1,
 960                                hdr, sizeof(*hdr) + len, true);
 961         }
 962 }
 963
 964 /*
 965  * Retrieve next WMI event from the pending list
 966  */
 967 static struct list_head *next_wmi_ev(struct wil6210_priv *wil)
 968 {
 969         ulong flags;
 970         struct list_head *ret = NULL;
 971
 972         spin_lock_irqsave(&wil->wmi_ev_lock, flags);
 973
 974         if (!list_empty(&wil->pending_wmi_ev)) {
 975                 ret = wil->pending_wmi_ev.next;
 976                 list_del(ret);
 977         }
 978
 979         spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
 980
 981         return ret;
 982 }
 983
 984 /*
 985  * Handler for the WMI events
 986  */
 987 void wmi_event_worker(struct work_struct *work)
 988 {
 989         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 990                                                  wmi_event_worker);
 991         struct pending_wmi_event *evt;
 992         struct list_head *lh;
 993
 994         while ((lh = next_wmi_ev(wil)) != NULL) {
 995                 evt = list_entry(lh, struct pending_wmi_event, list);
 996                 wmi_event_handle(wil, &evt->event.hdr);
 997                 kfree(evt);
 998         }
 999 }
1000
1001 void wmi_connect_worker(struct work_struct *work)
1002 {
1003         int rc;
1004         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
1005                                                 wmi_connect_worker);
1006
1007         if (wil->pending_connect_cid < 0) {
1008                 wil_err(wil, "No connection pending\n");
1009                 return;
1010         }
1011
1012         wil_dbg_wmi(wil, "Configure for connection CID %d\n",
1013                     wil->pending_connect_cid);
1014
1015         rc = wil_vring_init_tx(wil, 0, WIL6210_TX_RING_SIZE,
1016                                wil->pending_connect_cid, 0);
1017         wil->pending_connect_cid = -1;
1018         if (rc == 0)
1019                 wil_link_on(wil);
1020 }