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/etherdevice.h>
  18 #include <linux/if_arp.h>
  19
  20 #include "wil6210.h"
  21 #include "txrx.h"
  22 #include "wmi.h"
  23 #include "trace.h"
  24
  25 /**
  26  * WMI event receiving - theory of operations
  27  *
  28  * When firmware about to report WMI event, it fills memory area
  29  * in the mailbox and raises misc. IRQ. Thread interrupt handler invoked for
  30  * the misc IRQ, function @wmi_recv_cmd called by thread IRQ handler.
  31  *
  32  * @wmi_recv_cmd reads event, allocates memory chunk  and attaches it to the
  33  * event list @wil->pending_wmi_ev. Then, work queue @wil->wmi_wq wakes up
  34  * and handles events within the @wmi_event_worker. Every event get detached
  35  * from list, processed and deleted.
  36  *
  37  * Purpose for this mechanism is to release IRQ thread; otherwise,
  38  * if WMI event handling involves another WMI command flow, this 2-nd flow
  39  * won't be completed because of blocked IRQ thread.
  40  */
  41
  42 /**
  43  * Addressing - theory of operations
  44  *
  45  * There are several buses present on the WIL6210 card.
  46  * Same memory areas are visible at different address on
  47  * the different busses. There are 3 main bus masters:
  48  *  - MAC CPU (ucode)
  49  *  - User CPU (firmware)
  50  *  - AHB (host)
  51  *
  52  * On the PCI bus, there is one BAR (BAR0) of 2Mb size, exposing
  53  * AHB addresses starting from 0x880000
  54  *
  55  * Internally, firmware uses addresses that allows faster access but
  56  * are invisible from the host. To read from these addresses, alternative
  57  * AHB address must be used.
  58  *
  59  * Memory mapping
  60  * Linker address         PCI/Host address
  61  *                        0x880000 .. 0xa80000  2Mb BAR0
  62  * 0x800000 .. 0x807000   0x900000 .. 0x907000  28k DCCM
  63  * 0x840000 .. 0x857000   0x908000 .. 0x91f000  92k PERIPH
  64  */
  65
  66 /**
  67  * @fw_mapping provides memory remapping table
  68  */
  69 static const struct {
  70         u32 from; /* linker address - from, inclusive */
  71         u32 to;   /* linker address - to, exclusive */
  72         u32 host; /* PCI/Host address - BAR0 + 0x880000 */
  73 } fw_mapping[] = {
  74         {0x000000, 0x040000, 0x8c0000}, /* FW code RAM 256k */
  75         {0x800000, 0x808000, 0x900000}, /* FW data RAM 32k */
  76         {0x840000, 0x860000, 0x908000}, /* peripheral data RAM 128k/96k used */
  77         {0x880000, 0x88a000, 0x880000}, /* various RGF */
  78         {0x8c0000, 0x949000, 0x8c0000}, /* trivial mapping for upper area */
  79         /*
  80          * 920000..930000 ucode code RAM
  81          * 930000..932000 ucode data RAM
  82          * 932000..949000 back-door debug data
  83          */
  84 };
  85
  86 /**
  87  * return AHB address for given firmware/ucode internal (linker) address
  88  * @x - internal address
  89  * If address have no valid AHB mapping, return 0
  90  */
  91 static u32 wmi_addr_remap(u32 x)
  92 {
  93         uint i;
  94
  95         for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
  96                 if ((x >= fw_mapping[i].from) && (x < fw_mapping[i].to))
  97                         return x + fw_mapping[i].host - fw_mapping[i].from;
  98         }
  99
 100         return 0;
 101 }
 102
 103 /**
 104  * Check address validity for WMI buffer; remap if needed
 105  * @ptr - internal (linker) fw/ucode address
 106  *
 107  * Valid buffer should be DWORD aligned
 108  *
 109  * return address for accessing buffer from the host;
 110  * if buffer is not valid, return NULL.
 111  */
 112 void __iomem *wmi_buffer(struct wil6210_priv *wil, __le32 ptr_)
 113 {
 114         u32 off;
 115         u32 ptr = le32_to_cpu(ptr_);
 116
 117         if (ptr % 4)
 118                 return NULL;
 119
 120         ptr = wmi_addr_remap(ptr);
 121         if (ptr < WIL6210_FW_HOST_OFF)
 122                 return NULL;
 123
 124         off = HOSTADDR(ptr);
 125         if (off > WIL6210_MEM_SIZE - 4)
 126                 return NULL;
 127
 128         return wil->csr + off;
 129 }
 130
 131 /**
 132  * Check address validity
 133  */
 134 void __iomem *wmi_addr(struct wil6210_priv *wil, u32 ptr)
 135 {
 136         u32 off;
 137
 138         if (ptr % 4)
 139                 return NULL;
 140
 141         if (ptr < WIL6210_FW_HOST_OFF)
 142                 return NULL;
 143
 144         off = HOSTADDR(ptr);
 145         if (off > WIL6210_MEM_SIZE - 4)
 146                 return NULL;
 147
 148         return wil->csr + off;
 149 }
 150
 151 int wmi_read_hdr(struct wil6210_priv *wil, __le32 ptr,
 152                  struct wil6210_mbox_hdr *hdr)
 153 {
 154         void __iomem *src = wmi_buffer(wil, ptr);
 155         if (!src)
 156                 return -EINVAL;
 157
 158         wil_memcpy_fromio_32(hdr, src, sizeof(*hdr));
 159
 160         return 0;
 161 }
 162
 163 static int __wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
 164 {
 165         struct {
 166                 struct wil6210_mbox_hdr hdr;
 167                 struct wil6210_mbox_hdr_wmi wmi;
 168         } __packed cmd = {
 169                 .hdr = {
 170                         .type = WIL_MBOX_HDR_TYPE_WMI,
 171                         .flags = 0,
 172                         .len = cpu_to_le16(sizeof(cmd.wmi) + len),
 173                 },
 174                 .wmi = {
 175                         .mid = 0,
 176                         .id = cpu_to_le16(cmdid),
 177                 },
 178         };
 179         struct wil6210_mbox_ring *r = &wil->mbox_ctl.tx;
 180         struct wil6210_mbox_ring_desc d_head;
 181         u32 next_head;
 182         void __iomem *dst;
 183         void __iomem *head = wmi_addr(wil, r->head);
 184         uint retry;
 185
 186         if (sizeof(cmd) + len > r->entry_size) {
 187                 wil_err(wil, "WMI size too large: %d bytes, max is %d\n",
 188                         (int)(sizeof(cmd) + len), r->entry_size);
 189                 return -ERANGE;
 190         }
 191
 192         might_sleep();
 193
 194         if (!test_bit(wil_status_fwready, &wil->status)) {
 195                 wil_err(wil, "FW not ready\n");
 196                 return -EAGAIN;
 197         }
 198
 199         if (!head) {
 200                 wil_err(wil, "WMI head is garbage: 0x%08x\n", r->head);
 201                 return -EINVAL;
 202         }
 203         /* read Tx head till it is not busy */
 204         for (retry = 5; retry > 0; retry--) {
 205                 wil_memcpy_fromio_32(&d_head, head, sizeof(d_head));
 206                 if (d_head.sync == 0)
 207                         break;
 208                 msleep(20);
 209         }
 210         if (d_head.sync != 0) {
 211                 wil_err(wil, "WMI head busy\n");
 212                 return -EBUSY;
 213         }
 214         /* next head */
 215         next_head = r->base + ((r->head - r->base + sizeof(d_head)) % r->size);
 216         wil_dbg_wmi(wil, "Head 0x%08x -> 0x%08x\n", r->head, next_head);
 217         /* wait till FW finish with previous command */
 218         for (retry = 5; retry > 0; retry--) {
 219                 r->tail = ioread32(wil->csr + HOST_MBOX +
 220                                    offsetof(struct wil6210_mbox_ctl, tx.tail));
 221                 if (next_head != r->tail)
 222                         break;
 223                 msleep(20);
 224         }
 225         if (next_head == r->tail) {
 226                 wil_err(wil, "WMI ring full\n");
 227                 return -EBUSY;
 228         }
 229         dst = wmi_buffer(wil, d_head.addr);
 230         if (!dst) {
 231                 wil_err(wil, "invalid WMI buffer: 0x%08x\n",
 232                         le32_to_cpu(d_head.addr));
 233                 return -EINVAL;
 234         }
 235         cmd.hdr.seq = cpu_to_le16(++wil->wmi_seq);
 236         /* set command */
 237         wil_dbg_wmi(wil, "WMI command 0x%04x [%d]\n", cmdid, len);
 238         wil_hex_dump_wmi("Cmd ", DUMP_PREFIX_OFFSET, 16, 1, &cmd,
 239                          sizeof(cmd), true);
 240         wil_hex_dump_wmi("cmd ", DUMP_PREFIX_OFFSET, 16, 1, buf,
 241                          len, true);
 242         wil_memcpy_toio_32(dst, &cmd, sizeof(cmd));
 243         wil_memcpy_toio_32(dst + sizeof(cmd), buf, len);
 244         /* mark entry as full */
 245         iowrite32(1, wil->csr + HOSTADDR(r->head) +
 246                   offsetof(struct wil6210_mbox_ring_desc, sync));
 247         /* advance next ptr */
 248         iowrite32(r->head = next_head, wil->csr + HOST_MBOX +
 249                   offsetof(struct wil6210_mbox_ctl, tx.head));
 250
 251         trace_wil6210_wmi_cmd(&cmd.wmi, buf, len);
 252
 253         /* interrupt to FW */
 254         iowrite32(SW_INT_MBOX, wil->csr + HOST_SW_INT);
 255
 256         return 0;
 257 }
 258
 259 int wmi_send(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len)
 260 {
 261         int rc;
 262
 263         mutex_lock(&wil->wmi_mutex);
 264         rc = __wmi_send(wil, cmdid, buf, len);
 265         mutex_unlock(&wil->wmi_mutex);
 266
 267         return rc;
 268 }
 269
 270 /*=== Event handlers ===*/
 271 static void wmi_evt_ready(struct wil6210_priv *wil, int id, void *d, int len)
 272 {
 273         struct net_device *ndev = wil_to_ndev(wil);
 274         struct wireless_dev *wdev = wil->wdev;
 275         struct wmi_ready_event *evt = d;
 276         wil->fw_version = le32_to_cpu(evt->sw_version);
 277         wil->n_mids = evt->numof_additional_mids;
 278
 279         wil_dbg_wmi(wil, "FW ver. %d; MAC %pM; %d MID's\n", wil->fw_version,
 280                     evt->mac, wil->n_mids);
 281
 282         if (!is_valid_ether_addr(ndev->dev_addr)) {
 283                 memcpy(ndev->dev_addr, evt->mac, ETH_ALEN);
 284                 memcpy(ndev->perm_addr, evt->mac, ETH_ALEN);
 285         }
 286         snprintf(wdev->wiphy->fw_version, sizeof(wdev->wiphy->fw_version),
 287                  "%d", wil->fw_version);
 288 }
 289
 290 static void wmi_evt_fw_ready(struct wil6210_priv *wil, int id, void *d,
 291                              int len)
 292 {
 293         wil_dbg_wmi(wil, "WMI: FW ready\n");
 294
 295         set_bit(wil_status_fwready, &wil->status);
 296         /* reuse wmi_ready for the firmware ready indication */
 297         complete(&wil->wmi_ready);
 298 }
 299
 300 static void wmi_evt_rx_mgmt(struct wil6210_priv *wil, int id, void *d, int len)
 301 {
 302         struct wmi_rx_mgmt_packet_event *data = d;
 303         struct wiphy *wiphy = wil_to_wiphy(wil);
 304         struct ieee80211_mgmt *rx_mgmt_frame =
 305                         (struct ieee80211_mgmt *)data->payload;
 306         int ch_no = data->info.channel+1;
 307         u32 freq = ieee80211_channel_to_frequency(ch_no,
 308                         IEEE80211_BAND_60GHZ);
 309         struct ieee80211_channel *channel = ieee80211_get_channel(wiphy, freq);
 310         /* TODO convert LE to CPU */
 311         s32 signal = 0; /* TODO */
 312         __le16 fc = rx_mgmt_frame->frame_control;
 313         u32 d_len = le32_to_cpu(data->info.len);
 314         u16 d_status = le16_to_cpu(data->info.status);
 315
 316         wil_dbg_wmi(wil, "MGMT: channel %d MCS %d SNR %d\n",
 317                     data->info.channel, data->info.mcs, data->info.snr);
 318         wil_dbg_wmi(wil, "status 0x%04x len %d fc 0x%04x\n", d_status, d_len,
 319                     le16_to_cpu(fc));
 320         wil_dbg_wmi(wil, "qid %d mid %d cid %d\n",
 321                     data->info.qid, data->info.mid, data->info.cid);
 322
 323         if (!channel) {
 324                 wil_err(wil, "Frame on unsupported channel\n");
 325                 return;
 326         }
 327
 328         if (ieee80211_is_beacon(fc) || ieee80211_is_probe_resp(fc)) {
 329                 struct cfg80211_bss *bss;
 330
 331                 bss = cfg80211_inform_bss_frame(wiphy, channel, rx_mgmt_frame,
 332                                                 d_len, signal, GFP_KERNEL);
 333                 if (bss) {
 334                         wil_dbg_wmi(wil, "Added BSS %pM\n",
 335                                     rx_mgmt_frame->bssid);
 336                         cfg80211_put_bss(wiphy, bss);
 337                 } else {
 338                         wil_err(wil, "cfg80211_inform_bss() failed\n");
 339                 }
 340         } else {
 341                 cfg80211_rx_mgmt(wil->wdev, freq, signal,
 342                                  (void *)rx_mgmt_frame, d_len, 0, GFP_KERNEL);
 343         }
 344 }
 345
 346 static void wmi_evt_scan_complete(struct wil6210_priv *wil, int id,
 347                                   void *d, int len)
 348 {
 349         if (wil->scan_request) {
 350                 struct wmi_scan_complete_event *data = d;
 351                 bool aborted = (data->status != 0);
 352
 353                 wil_dbg_wmi(wil, "SCAN_COMPLETE(0x%08x)\n", data->status);
 354                 cfg80211_scan_done(wil->scan_request, aborted);
 355                 wil->scan_request = NULL;
 356         } else {
 357                 wil_err(wil, "SCAN_COMPLETE while not scanning\n");
 358         }
 359 }
 360
 361 static void wmi_evt_connect(struct wil6210_priv *wil, int id, void *d, int len)
 362 {
 363         struct net_device *ndev = wil_to_ndev(wil);
 364         struct wireless_dev *wdev = wil->wdev;
 365         struct wmi_connect_event *evt = d;
 366         int ch; /* channel number */
 367         struct station_info sinfo;
 368         u8 *assoc_req_ie, *assoc_resp_ie;
 369         size_t assoc_req_ielen, assoc_resp_ielen;
 370         /* capinfo(u16) + listen_interval(u16) + IEs */
 371         const size_t assoc_req_ie_offset = sizeof(u16) * 2;
 372         /* capinfo(u16) + status_code(u16) + associd(u16) + IEs */
 373         const size_t assoc_resp_ie_offset = sizeof(u16) * 3;
 374
 375         if (len < sizeof(*evt)) {
 376                 wil_err(wil, "Connect event too short : %d bytes\n", len);
 377                 return;
 378         }
 379         if (len != sizeof(*evt) + evt->beacon_ie_len + evt->assoc_req_len +
 380                    evt->assoc_resp_len) {
 381                 wil_err(wil,
 382                         "Connect event corrupted : %d != %d + %d + %d + %d\n",
 383                         len, (int)sizeof(*evt), evt->beacon_ie_len,
 384                         evt->assoc_req_len, evt->assoc_resp_len);
 385                 return;
 386         }
 387         ch = evt->channel + 1;
 388         wil_dbg_wmi(wil, "Connect %pM channel [%d] cid %d\n",
 389                     evt->bssid, ch, evt->cid);
 390         wil_hex_dump_wmi("connect AI : ", DUMP_PREFIX_OFFSET, 16, 1,
 391                          evt->assoc_info, len - sizeof(*evt), true);
 392
 393         /* figure out IE's */
 394         assoc_req_ie = &evt->assoc_info[evt->beacon_ie_len +
 395                                         assoc_req_ie_offset];
 396         assoc_req_ielen = evt->assoc_req_len - assoc_req_ie_offset;
 397         if (evt->assoc_req_len <= assoc_req_ie_offset) {
 398                 assoc_req_ie = NULL;
 399                 assoc_req_ielen = 0;
 400         }
 401
 402         assoc_resp_ie = &evt->assoc_info[evt->beacon_ie_len +
 403                                          evt->assoc_req_len +
 404                                          assoc_resp_ie_offset];
 405         assoc_resp_ielen = evt->assoc_resp_len - assoc_resp_ie_offset;
 406         if (evt->assoc_resp_len <= assoc_resp_ie_offset) {
 407                 assoc_resp_ie = NULL;
 408                 assoc_resp_ielen = 0;
 409         }
 410
 411         if ((wdev->iftype == NL80211_IFTYPE_STATION) ||
 412             (wdev->iftype == NL80211_IFTYPE_P2P_CLIENT)) {
 413                 if (!test_bit(wil_status_fwconnecting, &wil->status)) {
 414                         wil_err(wil, "Not in connecting state\n");
 415                         return;
 416                 }
 417                 del_timer_sync(&wil->connect_timer);
 418                 cfg80211_connect_result(ndev, evt->bssid,
 419                                         assoc_req_ie, assoc_req_ielen,
 420                                         assoc_resp_ie, assoc_resp_ielen,
 421                                         WLAN_STATUS_SUCCESS, GFP_KERNEL);
 422
 423         } else if ((wdev->iftype == NL80211_IFTYPE_AP) ||
 424                    (wdev->iftype == NL80211_IFTYPE_P2P_GO)) {
 425                 memset(&sinfo, 0, sizeof(sinfo));
 426
 427                 sinfo.generation = wil->sinfo_gen++;
 428
 429                 if (assoc_req_ie) {
 430                         sinfo.assoc_req_ies = assoc_req_ie;
 431                         sinfo.assoc_req_ies_len = assoc_req_ielen;
 432                         sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;
 433                 }
 434
 435                 cfg80211_new_sta(ndev, evt->bssid, &sinfo, GFP_KERNEL);
 436         }
 437         clear_bit(wil_status_fwconnecting, &wil->status);
 438         set_bit(wil_status_fwconnected, &wil->status);
 439
 440         /* FIXME FW can transmit only ucast frames to peer */
 441         /* FIXME real ring_id instead of hard coded 0 */
 442         memcpy(wil->dst_addr[0], evt->bssid, ETH_ALEN);
 443
 444         wil->pending_connect_cid = evt->cid;
 445         queue_work(wil->wmi_wq_conn, &wil->connect_worker);
 446 }
 447
 448 static void wmi_evt_disconnect(struct wil6210_priv *wil, int id,
 449                                void *d, int len)
 450 {
 451         struct wmi_disconnect_event *evt = d;
 452
 453         wil_dbg_wmi(wil, "Disconnect %pM reason %d proto %d wmi\n",
 454                     evt->bssid,
 455                     evt->protocol_reason_status, evt->disconnect_reason);
 456
 457         wil->sinfo_gen++;
 458
 459         wil6210_disconnect(wil, evt->bssid);
 460 }
 461
 462 static void wmi_evt_notify(struct wil6210_priv *wil, int id, void *d, int len)
 463 {
 464         struct wmi_notify_req_done_event *evt = d;
 465
 466         if (len < sizeof(*evt)) {
 467                 wil_err(wil, "Short NOTIFY event\n");
 468                 return;
 469         }
 470
 471         wil->stats.tsf = le64_to_cpu(evt->tsf);
 472         wil->stats.snr = le32_to_cpu(evt->snr_val);
 473         wil->stats.bf_mcs = le16_to_cpu(evt->bf_mcs);
 474         wil->stats.my_rx_sector = le16_to_cpu(evt->my_rx_sector);
 475         wil->stats.my_tx_sector = le16_to_cpu(evt->my_tx_sector);
 476         wil->stats.peer_rx_sector = le16_to_cpu(evt->other_rx_sector);
 477         wil->stats.peer_tx_sector = le16_to_cpu(evt->other_tx_sector);
 478         wil_dbg_wmi(wil, "Link status, MCS %d TSF 0x%016llx\n"
 479                     "BF status 0x%08x SNR 0x%08x\n"
 480                     "Tx Tpt %d goodput %d Rx goodput %d\n"
 481                     "Sectors(rx:tx) my %d:%d peer %d:%d\n",
 482                     wil->stats.bf_mcs, wil->stats.tsf, evt->status,
 483                     wil->stats.snr, le32_to_cpu(evt->tx_tpt),
 484                     le32_to_cpu(evt->tx_goodput), le32_to_cpu(evt->rx_goodput),
 485                     wil->stats.my_rx_sector, wil->stats.my_tx_sector,
 486                     wil->stats.peer_rx_sector, wil->stats.peer_tx_sector);
 487 }
 488
 489 /*
 490  * Firmware reports EAPOL frame using WME event.
 491  * Reconstruct Ethernet frame and deliver it via normal Rx
 492  */
 493 static void wmi_evt_eapol_rx(struct wil6210_priv *wil, int id,
 494                              void *d, int len)
 495 {
 496         struct net_device *ndev = wil_to_ndev(wil);
 497         struct wmi_eapol_rx_event *evt = d;
 498         u16 eapol_len = le16_to_cpu(evt->eapol_len);
 499         int sz = eapol_len + ETH_HLEN;
 500         struct sk_buff *skb;
 501         struct ethhdr *eth;
 502
 503         wil_dbg_wmi(wil, "EAPOL len %d from %pM\n", eapol_len,
 504                     evt->src_mac);
 505
 506         if (eapol_len > 196) { /* TODO: revisit size limit */
 507                 wil_err(wil, "EAPOL too large\n");
 508                 return;
 509         }
 510
 511         skb = alloc_skb(sz, GFP_KERNEL);
 512         if (!skb) {
 513                 wil_err(wil, "Failed to allocate skb\n");
 514                 return;
 515         }
 516         eth = (struct ethhdr *)skb_put(skb, ETH_HLEN);
 517         memcpy(eth->h_dest, ndev->dev_addr, ETH_ALEN);
 518         memcpy(eth->h_source, evt->src_mac, ETH_ALEN);
 519         eth->h_proto = cpu_to_be16(ETH_P_PAE);
 520         memcpy(skb_put(skb, eapol_len), evt->eapol, eapol_len);
 521         skb->protocol = eth_type_trans(skb, ndev);
 522         if (likely(netif_rx_ni(skb) == NET_RX_SUCCESS)) {
 523                 ndev->stats.rx_packets++;
 524                 ndev->stats.rx_bytes += skb->len;
 525         } else {
 526                 ndev->stats.rx_dropped++;
 527         }
 528 }
 529
 530 static void wmi_evt_linkup(struct wil6210_priv *wil, int id, void *d, int len)
 531 {
 532         struct net_device *ndev = wil_to_ndev(wil);
 533         struct wmi_data_port_open_event *evt = d;
 534
 535         wil_dbg_wmi(wil, "Link UP for CID %d\n", evt->cid);
 536
 537         netif_carrier_on(ndev);
 538 }
 539
 540 static void wmi_evt_linkdown(struct wil6210_priv *wil, int id, void *d, int len)
 541 {
 542         struct net_device *ndev = wil_to_ndev(wil);
 543         struct wmi_wbe_link_down_event *evt = d;
 544
 545         wil_dbg_wmi(wil, "Link DOWN for CID %d, reason %d\n",
 546                     evt->cid, le32_to_cpu(evt->reason));
 547
 548         netif_carrier_off(ndev);
 549 }
 550
 551 static void wmi_evt_ba_status(struct wil6210_priv *wil, int id, void *d,
 552                               int len)
 553 {
 554         struct wmi_vring_ba_status_event *evt = d;
 555
 556         wil_dbg_wmi(wil, "BACK[%d] %s {%d} timeout %d\n",
 557                     evt->ringid, evt->status ? "N/A" : "OK", evt->agg_wsize,
 558                     __le16_to_cpu(evt->ba_timeout));
 559 }
 560
 561 static const struct {
 562         int eventid;
 563         void (*handler)(struct wil6210_priv *wil, int eventid,
 564                         void *data, int data_len);
 565 } wmi_evt_handlers[] = {
 566         {WMI_READY_EVENTID,             wmi_evt_ready},
 567         {WMI_FW_READY_EVENTID,          wmi_evt_fw_ready},
 568         {WMI_RX_MGMT_PACKET_EVENTID,    wmi_evt_rx_mgmt},
 569         {WMI_SCAN_COMPLETE_EVENTID,     wmi_evt_scan_complete},
 570         {WMI_CONNECT_EVENTID,           wmi_evt_connect},
 571         {WMI_DISCONNECT_EVENTID,        wmi_evt_disconnect},
 572         {WMI_NOTIFY_REQ_DONE_EVENTID,   wmi_evt_notify},
 573         {WMI_EAPOL_RX_EVENTID,          wmi_evt_eapol_rx},
 574         {WMI_DATA_PORT_OPEN_EVENTID,    wmi_evt_linkup},
 575         {WMI_WBE_LINKDOWN_EVENTID,      wmi_evt_linkdown},
 576         {WMI_BA_STATUS_EVENTID,         wmi_evt_ba_status},
 577 };
 578
 579 /*
 580  * Run in IRQ context
 581  * Extract WMI command from mailbox. Queue it to the @wil->pending_wmi_ev
 582  * that will be eventually handled by the @wmi_event_worker in the thread
 583  * context of thread "wil6210_wmi"
 584  */
 585 void wmi_recv_cmd(struct wil6210_priv *wil)
 586 {
 587         struct wil6210_mbox_ring_desc d_tail;
 588         struct wil6210_mbox_hdr hdr;
 589         struct wil6210_mbox_ring *r = &wil->mbox_ctl.rx;
 590         struct pending_wmi_event *evt;
 591         u8 *cmd;
 592         void __iomem *src;
 593         ulong flags;
 594
 595         if (!test_bit(wil_status_reset_done, &wil->status)) {
 596                 wil_err(wil, "Reset not completed\n");
 597                 return;
 598         }
 599
 600         for (;;) {
 601                 u16 len;
 602
 603                 r->head = ioread32(wil->csr + HOST_MBOX +
 604                                    offsetof(struct wil6210_mbox_ctl, rx.head));
 605                 if (r->tail == r->head)
 606                         return;
 607
 608                 /* read cmd from tail */
 609                 wil_memcpy_fromio_32(&d_tail, wil->csr + HOSTADDR(r->tail),
 610                                      sizeof(struct wil6210_mbox_ring_desc));
 611                 if (d_tail.sync == 0) {
 612                         wil_err(wil, "Mbox evt not owned by FW?\n");
 613                         return;
 614                 }
 615
 616                 if (0 != wmi_read_hdr(wil, d_tail.addr, &hdr)) {
 617                         wil_err(wil, "Mbox evt at 0x%08x?\n",
 618                                 le32_to_cpu(d_tail.addr));
 619                         return;
 620                 }
 621
 622                 len = le16_to_cpu(hdr.len);
 623                 src = wmi_buffer(wil, d_tail.addr) +
 624                       sizeof(struct wil6210_mbox_hdr);
 625                 evt = kmalloc(ALIGN(offsetof(struct pending_wmi_event,
 626                                              event.wmi) + len, 4),
 627                               GFP_KERNEL);
 628                 if (!evt)
 629                         return;
 630
 631                 evt->event.hdr = hdr;
 632                 cmd = (void *)&evt->event.wmi;
 633                 wil_memcpy_fromio_32(cmd, src, len);
 634                 /* mark entry as empty */
 635                 iowrite32(0, wil->csr + HOSTADDR(r->tail) +
 636                           offsetof(struct wil6210_mbox_ring_desc, sync));
 637                 /* indicate */
 638                 wil_dbg_wmi(wil, "Mbox evt %04x %04x %04x %02x\n",
 639                             le16_to_cpu(hdr.seq), len, le16_to_cpu(hdr.type),
 640                             hdr.flags);
 641                 if ((hdr.type == WIL_MBOX_HDR_TYPE_WMI) &&
 642                     (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 643                         struct wil6210_mbox_hdr_wmi *wmi = &evt->event.wmi;
 644                         u16 id = le16_to_cpu(wmi->id);
 645                         u32 tstamp = le32_to_cpu(wmi->timestamp);
 646                         wil_dbg_wmi(wil, "WMI event 0x%04x MID %d @%d msec\n",
 647                                     id, wmi->mid, tstamp);
 648                         trace_wil6210_wmi_event(wmi, &wmi[1],
 649                                                 len - sizeof(*wmi));
 650                 }
 651                 wil_hex_dump_wmi("evt ", DUMP_PREFIX_OFFSET, 16, 1,
 652                                  &evt->event.hdr, sizeof(hdr) + len, true);
 653
 654                 /* advance tail */
 655                 r->tail = r->base + ((r->tail - r->base +
 656                           sizeof(struct wil6210_mbox_ring_desc)) % r->size);
 657                 iowrite32(r->tail, wil->csr + HOST_MBOX +
 658                           offsetof(struct wil6210_mbox_ctl, rx.tail));
 659
 660                 /* add to the pending list */
 661                 spin_lock_irqsave(&wil->wmi_ev_lock, flags);
 662                 list_add_tail(&evt->list, &wil->pending_wmi_ev);
 663                 spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
 664                 {
 665                         int q = queue_work(wil->wmi_wq,
 666                                            &wil->wmi_event_worker);
 667                         wil_dbg_wmi(wil, "queue_work -> %d\n", q);
 668                 }
 669         }
 670 }
 671
 672 int wmi_call(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len,
 673              u16 reply_id, void *reply, u8 reply_size, int to_msec)
 674 {
 675         int rc;
 676         int remain;
 677
 678         mutex_lock(&wil->wmi_mutex);
 679
 680         rc = __wmi_send(wil, cmdid, buf, len);
 681         if (rc)
 682                 goto out;
 683
 684         wil->reply_id = reply_id;
 685         wil->reply_buf = reply;
 686         wil->reply_size = reply_size;
 687         remain = wait_for_completion_timeout(&wil->wmi_ready,
 688                         msecs_to_jiffies(to_msec));
 689         if (0 == remain) {
 690                 wil_err(wil, "wmi_call(0x%04x->0x%04x) timeout %d msec\n",
 691                         cmdid, reply_id, to_msec);
 692                 rc = -ETIME;
 693         } else {
 694                 wil_dbg_wmi(wil,
 695                             "wmi_call(0x%04x->0x%04x) completed in %d msec\n",
 696                             cmdid, reply_id,
 697                             to_msec - jiffies_to_msecs(remain));
 698         }
 699         wil->reply_id = 0;
 700         wil->reply_buf = NULL;
 701         wil->reply_size = 0;
 702  out:
 703         mutex_unlock(&wil->wmi_mutex);
 704
 705         return rc;
 706 }
 707
 708 int wmi_echo(struct wil6210_priv *wil)
 709 {
 710         struct wmi_echo_cmd cmd = {
 711                 .value = cpu_to_le32(0x12345678),
 712         };
 713
 714         return wmi_call(wil, WMI_ECHO_CMDID, &cmd, sizeof(cmd),
 715                          WMI_ECHO_RSP_EVENTID, NULL, 0, 20);
 716 }
 717
 718 int wmi_set_mac_address(struct wil6210_priv *wil, void *addr)
 719 {
 720         struct wmi_set_mac_address_cmd cmd;
 721
 722         memcpy(cmd.mac, addr, ETH_ALEN);
 723
 724         wil_dbg_wmi(wil, "Set MAC %pM\n", addr);
 725
 726         return wmi_send(wil, WMI_SET_MAC_ADDRESS_CMDID, &cmd, sizeof(cmd));
 727 }
 728
 729 int wmi_pcp_start(struct wil6210_priv *wil, int bi, u8 wmi_nettype, u8 chan)
 730 {
 731         int rc;
 732
 733         struct wmi_pcp_start_cmd cmd = {
 734                 .bcon_interval = cpu_to_le16(bi),
 735                 .network_type = wmi_nettype,
 736                 .disable_sec_offload = 1,
 737                 .channel = chan - 1,
 738         };
 739         struct {
 740                 struct wil6210_mbox_hdr_wmi wmi;
 741                 struct wmi_pcp_started_event evt;
 742         } __packed reply;
 743
 744         if (!wil->secure_pcp)
 745                 cmd.disable_sec = 1;
 746
 747         /*
 748          * Processing time may be huge, in case of secure AP it takes about
 749          * 3500ms for FW to start AP
 750          */
 751         rc = wmi_call(wil, WMI_PCP_START_CMDID, &cmd, sizeof(cmd),
 752                       WMI_PCP_STARTED_EVENTID, &reply, sizeof(reply), 5000);
 753         if (rc)
 754                 return rc;
 755
 756         if (reply.evt.status != WMI_FW_STATUS_SUCCESS)
 757                 rc = -EINVAL;
 758
 759         return rc;
 760 }
 761
 762 int wmi_pcp_stop(struct wil6210_priv *wil)
 763 {
 764         return wmi_call(wil, WMI_PCP_STOP_CMDID, NULL, 0,
 765                         WMI_PCP_STOPPED_EVENTID, NULL, 0, 20);
 766 }
 767
 768 int wmi_set_ssid(struct wil6210_priv *wil, u8 ssid_len, const void *ssid)
 769 {
 770         struct wmi_set_ssid_cmd cmd = {
 771                 .ssid_len = cpu_to_le32(ssid_len),
 772         };
 773
 774         if (ssid_len > sizeof(cmd.ssid))
 775                 return -EINVAL;
 776
 777         memcpy(cmd.ssid, ssid, ssid_len);
 778
 779         return wmi_send(wil, WMI_SET_SSID_CMDID, &cmd, sizeof(cmd));
 780 }
 781
 782 int wmi_get_ssid(struct wil6210_priv *wil, u8 *ssid_len, void *ssid)
 783 {
 784         int rc;
 785         struct {
 786                 struct wil6210_mbox_hdr_wmi wmi;
 787                 struct wmi_set_ssid_cmd cmd;
 788         } __packed reply;
 789         int len; /* reply.cmd.ssid_len in CPU order */
 790
 791         rc = wmi_call(wil, WMI_GET_SSID_CMDID, NULL, 0, WMI_GET_SSID_EVENTID,
 792                       &reply, sizeof(reply), 20);
 793         if (rc)
 794                 return rc;
 795
 796         len = le32_to_cpu(reply.cmd.ssid_len);
 797         if (len > sizeof(reply.cmd.ssid))
 798                 return -EINVAL;
 799
 800         *ssid_len = len;
 801         memcpy(ssid, reply.cmd.ssid, len);
 802
 803         return 0;
 804 }
 805
 806 int wmi_set_channel(struct wil6210_priv *wil, int channel)
 807 {
 808         struct wmi_set_pcp_channel_cmd cmd = {
 809                 .channel = channel - 1,
 810         };
 811
 812         return wmi_send(wil, WMI_SET_PCP_CHANNEL_CMDID, &cmd, sizeof(cmd));
 813 }
 814
 815 int wmi_get_channel(struct wil6210_priv *wil, int *channel)
 816 {
 817         int rc;
 818         struct {
 819                 struct wil6210_mbox_hdr_wmi wmi;
 820                 struct wmi_set_pcp_channel_cmd cmd;
 821         } __packed reply;
 822
 823         rc = wmi_call(wil, WMI_GET_PCP_CHANNEL_CMDID, NULL, 0,
 824                       WMI_GET_PCP_CHANNEL_EVENTID, &reply, sizeof(reply), 20);
 825         if (rc)
 826                 return rc;
 827
 828         if (reply.cmd.channel > 3)
 829                 return -EINVAL;
 830
 831         *channel = reply.cmd.channel + 1;
 832
 833         return 0;
 834 }
 835
 836 int wmi_p2p_cfg(struct wil6210_priv *wil, int channel)
 837 {
 838         struct wmi_p2p_cfg_cmd cmd = {
 839                 .discovery_mode = WMI_DISCOVERY_MODE_NON_OFFLOAD,
 840                 .channel = channel - 1,
 841         };
 842
 843         return wmi_send(wil, WMI_P2P_CFG_CMDID, &cmd, sizeof(cmd));
 844 }
 845
 846 int wmi_del_cipher_key(struct wil6210_priv *wil, u8 key_index,
 847                        const void *mac_addr)
 848 {
 849         struct wmi_delete_cipher_key_cmd cmd = {
 850                 .key_index = key_index,
 851         };
 852
 853         if (mac_addr)
 854                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 855
 856         return wmi_send(wil, WMI_DELETE_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 857 }
 858
 859 int wmi_add_cipher_key(struct wil6210_priv *wil, u8 key_index,
 860                        const void *mac_addr, int key_len, const void *key)
 861 {
 862         struct wmi_add_cipher_key_cmd cmd = {
 863                 .key_index = key_index,
 864                 .key_usage = WMI_KEY_USE_PAIRWISE,
 865                 .key_len = key_len,
 866         };
 867
 868         if (!key || (key_len > sizeof(cmd.key)))
 869                 return -EINVAL;
 870
 871         memcpy(cmd.key, key, key_len);
 872         if (mac_addr)
 873                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 874
 875         return wmi_send(wil, WMI_ADD_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 876 }
 877
 878 int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie)
 879 {
 880         int rc;
 881         u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len;
 882         struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL);
 883         if (!cmd)
 884                 return -ENOMEM;
 885
 886         cmd->mgmt_frm_type = type;
 887         /* BUG: FW API define ieLen as u8. Will fix FW */
 888         cmd->ie_len = cpu_to_le16(ie_len);
 889         memcpy(cmd->ie_info, ie, ie_len);
 890         rc = wmi_send(wil, WMI_SET_APPIE_CMDID, cmd, len);
 891         kfree(cmd);
 892
 893         return rc;
 894 }
 895
 896 int wmi_rx_chain_add(struct wil6210_priv *wil, struct vring *vring)
 897 {
 898         struct wireless_dev *wdev = wil->wdev;
 899         struct net_device *ndev = wil_to_ndev(wil);
 900         struct wmi_cfg_rx_chain_cmd cmd = {
 901                 .action = WMI_RX_CHAIN_ADD,
 902                 .rx_sw_ring = {
 903                         .max_mpdu_size = cpu_to_le16(RX_BUF_LEN),
 904                         .ring_mem_base = cpu_to_le64(vring->pa),
 905                         .ring_size = cpu_to_le16(vring->size),
 906                 },
 907                 .mid = 0, /* TODO - what is it? */
 908                 .decap_trans_type = WMI_DECAP_TYPE_802_3,
 909         };
 910         struct {
 911                 struct wil6210_mbox_hdr_wmi wmi;
 912                 struct wmi_cfg_rx_chain_done_event evt;
 913         } __packed evt;
 914         int rc;
 915
 916         if (wdev->iftype == NL80211_IFTYPE_MONITOR) {
 917                 struct ieee80211_channel *ch = wdev->preset_chandef.chan;
 918
 919                 cmd.sniffer_cfg.mode = cpu_to_le32(WMI_SNIFFER_ON);
 920                 if (ch)
 921                         cmd.sniffer_cfg.channel = ch->hw_value - 1;
 922                 cmd.sniffer_cfg.phy_info_mode =
 923                         cpu_to_le32(ndev->type == ARPHRD_IEEE80211_RADIOTAP);
 924                 cmd.sniffer_cfg.phy_support =
 925                         cpu_to_le32((wil->monitor_flags & MONITOR_FLAG_CONTROL)
 926                                     ? WMI_SNIFFER_CP : WMI_SNIFFER_DP);
 927         } else {
 928                 /* Initialize offload (in non-sniffer mode).
 929                  * Linux IP stack always calculates IP checksum
 930                  * HW always calculate TCP/UDP checksum
 931                  */
 932                 cmd.l3_l4_ctrl |= (1 << L3_L4_CTRL_TCPIP_CHECKSUM_EN_POS);
 933         }
 934         /* typical time for secure PCP is 840ms */
 935         rc = wmi_call(wil, WMI_CFG_RX_CHAIN_CMDID, &cmd, sizeof(cmd),
 936                       WMI_CFG_RX_CHAIN_DONE_EVENTID, &evt, sizeof(evt), 2000);
 937         if (rc)
 938                 return rc;
 939
 940         vring->hwtail = le32_to_cpu(evt.evt.rx_ring_tail_ptr);
 941
 942         wil_dbg_misc(wil, "Rx init: status %d tail 0x%08x\n",
 943                      le32_to_cpu(evt.evt.status), vring->hwtail);
 944
 945         if (le32_to_cpu(evt.evt.status) != WMI_CFG_RX_CHAIN_SUCCESS)
 946                 rc = -EINVAL;
 947
 948         return rc;
 949 }
 950
 951 int wmi_get_temperature(struct wil6210_priv *wil, u32 *t_m, u32 *t_r)
 952 {
 953         int rc;
 954         struct wmi_temp_sense_cmd cmd = {
 955                 .measure_marlon_m_en = cpu_to_le32(!!t_m),
 956                 .measure_marlon_r_en = cpu_to_le32(!!t_r),
 957         };
 958         struct {
 959                 struct wil6210_mbox_hdr_wmi wmi;
 960                 struct wmi_temp_sense_done_event evt;
 961         } __packed reply;
 962
 963         rc = wmi_call(wil, WMI_TEMP_SENSE_CMDID, &cmd, sizeof(cmd),
 964                       WMI_TEMP_SENSE_DONE_EVENTID, &reply, sizeof(reply), 100);
 965         if (rc)
 966                 return rc;
 967
 968         if (t_m)
 969                 *t_m = le32_to_cpu(reply.evt.marlon_m_t1000);
 970         if (t_r)
 971                 *t_r = le32_to_cpu(reply.evt.marlon_r_t1000);
 972
 973         return 0;
 974 }
 975
 976 void wmi_event_flush(struct wil6210_priv *wil)
 977 {
 978         struct pending_wmi_event *evt, *t;
 979
 980         wil_dbg_wmi(wil, "%s()\n", __func__);
 981
 982         list_for_each_entry_safe(evt, t, &wil->pending_wmi_ev, list) {
 983                 list_del(&evt->list);
 984                 kfree(evt);
 985         }
 986 }
 987
 988 static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id,
 989                                  void *d, int len)
 990 {
 991         uint i;
 992
 993         for (i = 0; i < ARRAY_SIZE(wmi_evt_handlers); i++) {
 994                 if (wmi_evt_handlers[i].eventid == id) {
 995                         wmi_evt_handlers[i].handler(wil, id, d, len);
 996                         return true;
 997                 }
 998         }
 999
1000         return false;
1001 }
1002
1003 static void wmi_event_handle(struct wil6210_priv *wil,
1004                              struct wil6210_mbox_hdr *hdr)
1005 {
1006         u16 len = le16_to_cpu(hdr->len);
1007
1008         if ((hdr->type == WIL_MBOX_HDR_TYPE_WMI) &&
1009             (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
1010                 struct wil6210_mbox_hdr_wmi *wmi = (void *)(&hdr[1]);
1011                 void *evt_data = (void *)(&wmi[1]);
1012                 u16 id = le16_to_cpu(wmi->id);
1013                 /* check if someone waits for this event */
1014                 if (wil->reply_id && wil->reply_id == id) {
1015                         if (wil->reply_buf) {
1016                                 memcpy(wil->reply_buf, wmi,
1017                                        min(len, wil->reply_size));
1018                         } else {
1019                                 wmi_evt_call_handler(wil, id, evt_data,
1020                                                      len - sizeof(*wmi));
1021                         }
1022                         wil_dbg_wmi(wil, "Complete WMI 0x%04x\n", id);
1023                         complete(&wil->wmi_ready);
1024                         return;
1025                 }
1026                 /* unsolicited event */
1027                 /* search for handler */
1028                 if (!wmi_evt_call_handler(wil, id, evt_data,
1029                                           len - sizeof(*wmi))) {
1030                         wil_err(wil, "Unhandled event 0x%04x\n", id);
1031                 }
1032         } else {
1033                 wil_err(wil, "Unknown event type\n");
1034                 print_hex_dump(KERN_ERR, "evt?? ", DUMP_PREFIX_OFFSET, 16, 1,
1035                                hdr, sizeof(*hdr) + len, true);
1036         }
1037 }
1038
1039 /*
1040  * Retrieve next WMI event from the pending list
1041  */
1042 static struct list_head *next_wmi_ev(struct wil6210_priv *wil)
1043 {
1044         ulong flags;
1045         struct list_head *ret = NULL;
1046
1047         spin_lock_irqsave(&wil->wmi_ev_lock, flags);
1048
1049         if (!list_empty(&wil->pending_wmi_ev)) {
1050                 ret = wil->pending_wmi_ev.next;
1051                 list_del(ret);
1052         }
1053
1054         spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
1055
1056         return ret;
1057 }
1058
1059 /*
1060  * Handler for the WMI events
1061  */
1062 void wmi_event_worker(struct work_struct *work)
1063 {
1064         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
1065                                                  wmi_event_worker);
1066         struct pending_wmi_event *evt;
1067         struct list_head *lh;
1068
1069         while ((lh = next_wmi_ev(wil)) != NULL) {
1070                 evt = list_entry(lh, struct pending_wmi_event, list);
1071                 wmi_event_handle(wil, &evt->event.hdr);
1072                 kfree(evt);
1073         }
1074 }