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 void wmi_evt_linkup(struct wil6210_priv *wil, int id, void *d, int len)
 532 {
 533         struct net_device *ndev = wil_to_ndev(wil);
 534         struct wmi_data_port_open_event *evt = d;
 535
 536         wil_dbg_wmi(wil, "Link UP for CID %d\n", evt->cid);
 537
 538         netif_carrier_on(ndev);
 539 }
 540
 541 static void wmi_evt_linkdown(struct wil6210_priv *wil, int id, void *d, int len)
 542 {
 543         struct net_device *ndev = wil_to_ndev(wil);
 544         struct wmi_wbe_link_down_event *evt = d;
 545
 546         wil_dbg_wmi(wil, "Link DOWN for CID %d, reason %d\n",
 547                     evt->cid, le32_to_cpu(evt->reason));
 548
 549         netif_carrier_off(ndev);
 550 }
 551
 552 static void wmi_evt_ba_status(struct wil6210_priv *wil, int id, void *d,
 553                               int len)
 554 {
 555         struct wmi_vring_ba_status_event *evt = d;
 556
 557         wil_dbg_wmi(wil, "BACK[%d] %s {%d} timeout %d\n",
 558                     evt->ringid, evt->status ? "N/A" : "OK", evt->agg_wsize,
 559                     __le16_to_cpu(evt->ba_timeout));
 560 }
 561
 562 static const struct {
 563         int eventid;
 564         void (*handler)(struct wil6210_priv *wil, int eventid,
 565                         void *data, int data_len);
 566 } wmi_evt_handlers[] = {
 567         {WMI_READY_EVENTID,             wmi_evt_ready},
 568         {WMI_FW_READY_EVENTID,          wmi_evt_fw_ready},
 569         {WMI_RX_MGMT_PACKET_EVENTID,    wmi_evt_rx_mgmt},
 570         {WMI_SCAN_COMPLETE_EVENTID,     wmi_evt_scan_complete},
 571         {WMI_CONNECT_EVENTID,           wmi_evt_connect},
 572         {WMI_DISCONNECT_EVENTID,        wmi_evt_disconnect},
 573         {WMI_NOTIFY_REQ_DONE_EVENTID,   wmi_evt_notify},
 574         {WMI_EAPOL_RX_EVENTID,          wmi_evt_eapol_rx},
 575         {WMI_DATA_PORT_OPEN_EVENTID,    wmi_evt_linkup},
 576         {WMI_WBE_LINKDOWN_EVENTID,      wmi_evt_linkdown},
 577         {WMI_BA_STATUS_EVENTID,         wmi_evt_ba_status},
 578 };
 579
 580 /*
 581  * Run in IRQ context
 582  * Extract WMI command from mailbox. Queue it to the @wil->pending_wmi_ev
 583  * that will be eventually handled by the @wmi_event_worker in the thread
 584  * context of thread "wil6210_wmi"
 585  */
 586 void wmi_recv_cmd(struct wil6210_priv *wil)
 587 {
 588         struct wil6210_mbox_ring_desc d_tail;
 589         struct wil6210_mbox_hdr hdr;
 590         struct wil6210_mbox_ring *r = &wil->mbox_ctl.rx;
 591         struct pending_wmi_event *evt;
 592         u8 *cmd;
 593         void __iomem *src;
 594         ulong flags;
 595
 596         for (;;) {
 597                 u16 len;
 598
 599                 r->head = ioread32(wil->csr + HOST_MBOX +
 600                                    offsetof(struct wil6210_mbox_ctl, rx.head));
 601                 if (r->tail == r->head)
 602                         return;
 603
 604                 /* read cmd from tail */
 605                 wil_memcpy_fromio_32(&d_tail, wil->csr + HOSTADDR(r->tail),
 606                                      sizeof(struct wil6210_mbox_ring_desc));
 607                 if (d_tail.sync == 0) {
 608                         wil_err(wil, "Mbox evt not owned by FW?\n");
 609                         return;
 610                 }
 611
 612                 if (0 != wmi_read_hdr(wil, d_tail.addr, &hdr)) {
 613                         wil_err(wil, "Mbox evt at 0x%08x?\n",
 614                                 le32_to_cpu(d_tail.addr));
 615                         return;
 616                 }
 617
 618                 len = le16_to_cpu(hdr.len);
 619                 src = wmi_buffer(wil, d_tail.addr) +
 620                       sizeof(struct wil6210_mbox_hdr);
 621                 evt = kmalloc(ALIGN(offsetof(struct pending_wmi_event,
 622                                              event.wmi) + len, 4),
 623                               GFP_KERNEL);
 624                 if (!evt)
 625                         return;
 626
 627                 evt->event.hdr = hdr;
 628                 cmd = (void *)&evt->event.wmi;
 629                 wil_memcpy_fromio_32(cmd, src, len);
 630                 /* mark entry as empty */
 631                 iowrite32(0, wil->csr + HOSTADDR(r->tail) +
 632                           offsetof(struct wil6210_mbox_ring_desc, sync));
 633                 /* indicate */
 634                 wil_dbg_wmi(wil, "Mbox evt %04x %04x %04x %02x\n",
 635                             le16_to_cpu(hdr.seq), len, le16_to_cpu(hdr.type),
 636                             hdr.flags);
 637                 if ((hdr.type == WIL_MBOX_HDR_TYPE_WMI) &&
 638                     (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 639                         wil_dbg_wmi(wil, "WMI event 0x%04x\n",
 640                                     evt->event.wmi.id);
 641                 }
 642                 wil_hex_dump_wmi("evt ", DUMP_PREFIX_OFFSET, 16, 1,
 643                                  &evt->event.hdr, sizeof(hdr) + len, true);
 644
 645                 /* advance tail */
 646                 r->tail = r->base + ((r->tail - r->base +
 647                           sizeof(struct wil6210_mbox_ring_desc)) % r->size);
 648                 iowrite32(r->tail, wil->csr + HOST_MBOX +
 649                           offsetof(struct wil6210_mbox_ctl, rx.tail));
 650
 651                 /* add to the pending list */
 652                 spin_lock_irqsave(&wil->wmi_ev_lock, flags);
 653                 list_add_tail(&evt->list, &wil->pending_wmi_ev);
 654                 spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
 655                 {
 656                         int q = queue_work(wil->wmi_wq,
 657                                            &wil->wmi_event_worker);
 658                         wil_dbg_wmi(wil, "queue_work -> %d\n", q);
 659                 }
 660         }
 661 }
 662
 663 int wmi_call(struct wil6210_priv *wil, u16 cmdid, void *buf, u16 len,
 664              u16 reply_id, void *reply, u8 reply_size, int to_msec)
 665 {
 666         int rc;
 667         int remain;
 668
 669         mutex_lock(&wil->wmi_mutex);
 670
 671         rc = __wmi_send(wil, cmdid, buf, len);
 672         if (rc)
 673                 goto out;
 674
 675         wil->reply_id = reply_id;
 676         wil->reply_buf = reply;
 677         wil->reply_size = reply_size;
 678         remain = wait_for_completion_timeout(&wil->wmi_ready,
 679                         msecs_to_jiffies(to_msec));
 680         if (0 == remain) {
 681                 wil_err(wil, "wmi_call(0x%04x->0x%04x) timeout %d msec\n",
 682                         cmdid, reply_id, to_msec);
 683                 rc = -ETIME;
 684         } else {
 685                 wil_dbg_wmi(wil,
 686                             "wmi_call(0x%04x->0x%04x) completed in %d msec\n",
 687                             cmdid, reply_id,
 688                             to_msec - jiffies_to_msecs(remain));
 689         }
 690         wil->reply_id = 0;
 691         wil->reply_buf = NULL;
 692         wil->reply_size = 0;
 693  out:
 694         mutex_unlock(&wil->wmi_mutex);
 695
 696         return rc;
 697 }
 698
 699 int wmi_echo(struct wil6210_priv *wil)
 700 {
 701         struct wmi_echo_cmd cmd = {
 702                 .value = cpu_to_le32(0x12345678),
 703         };
 704
 705         return wmi_call(wil, WMI_ECHO_CMDID, &cmd, sizeof(cmd),
 706                          WMI_ECHO_RSP_EVENTID, NULL, 0, 20);
 707 }
 708
 709 int wmi_set_mac_address(struct wil6210_priv *wil, void *addr)
 710 {
 711         struct wmi_set_mac_address_cmd cmd;
 712
 713         memcpy(cmd.mac, addr, ETH_ALEN);
 714
 715         wil_dbg_wmi(wil, "Set MAC %pM\n", addr);
 716
 717         return wmi_send(wil, WMI_SET_MAC_ADDRESS_CMDID, &cmd, sizeof(cmd));
 718 }
 719
 720 int wmi_set_bcon(struct wil6210_priv *wil, int bi, u8 wmi_nettype)
 721 {
 722         struct wmi_bcon_ctrl_cmd cmd = {
 723                 .bcon_interval = cpu_to_le16(bi),
 724                 .network_type = wmi_nettype,
 725                 .disable_sec_offload = 1,
 726         };
 727
 728         if (!wil->secure_pcp)
 729                 cmd.disable_sec = 1;
 730
 731         return wmi_send(wil, WMI_BCON_CTRL_CMDID, &cmd, sizeof(cmd));
 732 }
 733
 734 int wmi_set_ssid(struct wil6210_priv *wil, u8 ssid_len, const void *ssid)
 735 {
 736         struct wmi_set_ssid_cmd cmd = {
 737                 .ssid_len = cpu_to_le32(ssid_len),
 738         };
 739
 740         if (ssid_len > sizeof(cmd.ssid))
 741                 return -EINVAL;
 742
 743         memcpy(cmd.ssid, ssid, ssid_len);
 744
 745         return wmi_send(wil, WMI_SET_SSID_CMDID, &cmd, sizeof(cmd));
 746 }
 747
 748 int wmi_get_ssid(struct wil6210_priv *wil, u8 *ssid_len, void *ssid)
 749 {
 750         int rc;
 751         struct {
 752                 struct wil6210_mbox_hdr_wmi wmi;
 753                 struct wmi_set_ssid_cmd cmd;
 754         } __packed reply;
 755         int len; /* reply.cmd.ssid_len in CPU order */
 756
 757         rc = wmi_call(wil, WMI_GET_SSID_CMDID, NULL, 0, WMI_GET_SSID_EVENTID,
 758                       &reply, sizeof(reply), 20);
 759         if (rc)
 760                 return rc;
 761
 762         len = le32_to_cpu(reply.cmd.ssid_len);
 763         if (len > sizeof(reply.cmd.ssid))
 764                 return -EINVAL;
 765
 766         *ssid_len = len;
 767         memcpy(ssid, reply.cmd.ssid, len);
 768
 769         return 0;
 770 }
 771
 772 int wmi_set_channel(struct wil6210_priv *wil, int channel)
 773 {
 774         struct wmi_set_pcp_channel_cmd cmd = {
 775                 .channel = channel - 1,
 776         };
 777
 778         return wmi_send(wil, WMI_SET_PCP_CHANNEL_CMDID, &cmd, sizeof(cmd));
 779 }
 780
 781 int wmi_get_channel(struct wil6210_priv *wil, int *channel)
 782 {
 783         int rc;
 784         struct {
 785                 struct wil6210_mbox_hdr_wmi wmi;
 786                 struct wmi_set_pcp_channel_cmd cmd;
 787         } __packed reply;
 788
 789         rc = wmi_call(wil, WMI_GET_PCP_CHANNEL_CMDID, NULL, 0,
 790                       WMI_GET_PCP_CHANNEL_EVENTID, &reply, sizeof(reply), 20);
 791         if (rc)
 792                 return rc;
 793
 794         if (reply.cmd.channel > 3)
 795                 return -EINVAL;
 796
 797         *channel = reply.cmd.channel + 1;
 798
 799         return 0;
 800 }
 801
 802 int wmi_tx_eapol(struct wil6210_priv *wil, struct sk_buff *skb)
 803 {
 804         struct wmi_eapol_tx_cmd *cmd;
 805         struct ethhdr *eth;
 806         u16 eapol_len = skb->len - ETH_HLEN;
 807         void *eapol = skb->data + ETH_HLEN;
 808         uint i;
 809         int rc;
 810
 811         skb_set_mac_header(skb, 0);
 812         eth = eth_hdr(skb);
 813         wil_dbg_wmi(wil, "EAPOL %d bytes to %pM\n", eapol_len, eth->h_dest);
 814         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 815                 if (memcmp(wil->dst_addr[i], eth->h_dest, ETH_ALEN) == 0)
 816                         goto found_dest;
 817         }
 818
 819         return -EINVAL;
 820
 821  found_dest:
 822         /* find out eapol data & len */
 823         cmd = kzalloc(sizeof(*cmd) + eapol_len, GFP_KERNEL);
 824         if (!cmd)
 825                 return -EINVAL;
 826
 827         memcpy(cmd->dst_mac, eth->h_dest, ETH_ALEN);
 828         cmd->eapol_len = cpu_to_le16(eapol_len);
 829         memcpy(cmd->eapol, eapol, eapol_len);
 830         rc = wmi_send(wil, WMI_EAPOL_TX_CMDID, cmd, sizeof(*cmd) + eapol_len);
 831         kfree(cmd);
 832
 833         return rc;
 834 }
 835
 836 int wmi_del_cipher_key(struct wil6210_priv *wil, u8 key_index,
 837                        const void *mac_addr)
 838 {
 839         struct wmi_delete_cipher_key_cmd cmd = {
 840                 .key_index = key_index,
 841         };
 842
 843         if (mac_addr)
 844                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 845
 846         return wmi_send(wil, WMI_DELETE_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 847 }
 848
 849 int wmi_add_cipher_key(struct wil6210_priv *wil, u8 key_index,
 850                        const void *mac_addr, int key_len, const void *key)
 851 {
 852         struct wmi_add_cipher_key_cmd cmd = {
 853                 .key_index = key_index,
 854                 .key_usage = WMI_KEY_USE_PAIRWISE,
 855                 .key_len = key_len,
 856         };
 857
 858         if (!key || (key_len > sizeof(cmd.key)))
 859                 return -EINVAL;
 860
 861         memcpy(cmd.key, key, key_len);
 862         if (mac_addr)
 863                 memcpy(cmd.mac, mac_addr, WMI_MAC_LEN);
 864
 865         return wmi_send(wil, WMI_ADD_CIPHER_KEY_CMDID, &cmd, sizeof(cmd));
 866 }
 867
 868 int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie)
 869 {
 870         int rc;
 871         u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len;
 872         struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL);
 873         if (!cmd)
 874                 return -ENOMEM;
 875
 876         cmd->mgmt_frm_type = type;
 877         /* BUG: FW API define ieLen as u8. Will fix FW */
 878         cmd->ie_len = cpu_to_le16(ie_len);
 879         memcpy(cmd->ie_info, ie, ie_len);
 880         rc = wmi_send(wil, WMI_SET_APPIE_CMDID, &cmd, len);
 881         kfree(cmd);
 882
 883         return rc;
 884 }
 885
 886 int wmi_rx_chain_add(struct wil6210_priv *wil, struct vring *vring)
 887 {
 888         struct wireless_dev *wdev = wil->wdev;
 889         struct net_device *ndev = wil_to_ndev(wil);
 890         struct wmi_cfg_rx_chain_cmd cmd = {
 891                 .action = WMI_RX_CHAIN_ADD,
 892                 .rx_sw_ring = {
 893                         .max_mpdu_size = cpu_to_le16(RX_BUF_LEN),
 894                         .ring_mem_base = cpu_to_le64(vring->pa),
 895                         .ring_size = cpu_to_le16(vring->size),
 896                 },
 897                 .mid = 0, /* TODO - what is it? */
 898                 .decap_trans_type = WMI_DECAP_TYPE_802_3,
 899         };
 900         struct {
 901                 struct wil6210_mbox_hdr_wmi wmi;
 902                 struct wmi_cfg_rx_chain_done_event evt;
 903         } __packed evt;
 904         int rc;
 905
 906         if (wdev->iftype == NL80211_IFTYPE_MONITOR) {
 907                 struct ieee80211_channel *ch = wdev->preset_chandef.chan;
 908
 909                 cmd.sniffer_cfg.mode = cpu_to_le32(WMI_SNIFFER_ON);
 910                 if (ch)
 911                         cmd.sniffer_cfg.channel = ch->hw_value - 1;
 912                 cmd.sniffer_cfg.phy_info_mode =
 913                         cpu_to_le32(ndev->type == ARPHRD_IEEE80211_RADIOTAP);
 914                 cmd.sniffer_cfg.phy_support =
 915                         cpu_to_le32((wil->monitor_flags & MONITOR_FLAG_CONTROL)
 916                                     ? WMI_SNIFFER_CP : WMI_SNIFFER_DP);
 917         }
 918         /* typical time for secure PCP is 840ms */
 919         rc = wmi_call(wil, WMI_CFG_RX_CHAIN_CMDID, &cmd, sizeof(cmd),
 920                       WMI_CFG_RX_CHAIN_DONE_EVENTID, &evt, sizeof(evt), 2000);
 921         if (rc)
 922                 return rc;
 923
 924         vring->hwtail = le32_to_cpu(evt.evt.rx_ring_tail_ptr);
 925
 926         wil_dbg_misc(wil, "Rx init: status %d tail 0x%08x\n",
 927                      le32_to_cpu(evt.evt.status), vring->hwtail);
 928
 929         if (le32_to_cpu(evt.evt.status) != WMI_CFG_RX_CHAIN_SUCCESS)
 930                 rc = -EINVAL;
 931
 932         return rc;
 933 }
 934
 935 void wmi_event_flush(struct wil6210_priv *wil)
 936 {
 937         struct pending_wmi_event *evt, *t;
 938
 939         wil_dbg_wmi(wil, "%s()\n", __func__);
 940
 941         list_for_each_entry_safe(evt, t, &wil->pending_wmi_ev, list) {
 942                 list_del(&evt->list);
 943                 kfree(evt);
 944         }
 945 }
 946
 947 static bool wmi_evt_call_handler(struct wil6210_priv *wil, int id,
 948                                  void *d, int len)
 949 {
 950         uint i;
 951
 952         for (i = 0; i < ARRAY_SIZE(wmi_evt_handlers); i++) {
 953                 if (wmi_evt_handlers[i].eventid == id) {
 954                         wmi_evt_handlers[i].handler(wil, id, d, len);
 955                         return true;
 956                 }
 957         }
 958
 959         return false;
 960 }
 961
 962 static void wmi_event_handle(struct wil6210_priv *wil,
 963                              struct wil6210_mbox_hdr *hdr)
 964 {
 965         u16 len = le16_to_cpu(hdr->len);
 966
 967         if ((hdr->type == WIL_MBOX_HDR_TYPE_WMI) &&
 968             (len >= sizeof(struct wil6210_mbox_hdr_wmi))) {
 969                 struct wil6210_mbox_hdr_wmi *wmi = (void *)(&hdr[1]);
 970                 void *evt_data = (void *)(&wmi[1]);
 971                 u16 id = le16_to_cpu(wmi->id);
 972                 /* check if someone waits for this event */
 973                 if (wil->reply_id && wil->reply_id == id) {
 974                         if (wil->reply_buf) {
 975                                 memcpy(wil->reply_buf, wmi,
 976                                        min(len, wil->reply_size));
 977                         } else {
 978                                 wmi_evt_call_handler(wil, id, evt_data,
 979                                                      len - sizeof(*wmi));
 980                         }
 981                         wil_dbg_wmi(wil, "Complete WMI 0x%04x\n", id);
 982                         complete(&wil->wmi_ready);
 983                         return;
 984                 }
 985                 /* unsolicited event */
 986                 /* search for handler */
 987                 if (!wmi_evt_call_handler(wil, id, evt_data,
 988                                           len - sizeof(*wmi))) {
 989                         wil_err(wil, "Unhandled event 0x%04x\n", id);
 990                 }
 991         } else {
 992                 wil_err(wil, "Unknown event type\n");
 993                 print_hex_dump(KERN_ERR, "evt?? ", DUMP_PREFIX_OFFSET, 16, 1,
 994                                hdr, sizeof(*hdr) + len, true);
 995         }
 996 }
 997
 998 /*
 999  * Retrieve next WMI event from the pending list
1000  */
1001 static struct list_head *next_wmi_ev(struct wil6210_priv *wil)
1002 {
1003         ulong flags;
1004         struct list_head *ret = NULL;
1005
1006         spin_lock_irqsave(&wil->wmi_ev_lock, flags);
1007
1008         if (!list_empty(&wil->pending_wmi_ev)) {
1009                 ret = wil->pending_wmi_ev.next;
1010                 list_del(ret);
1011         }
1012
1013         spin_unlock_irqrestore(&wil->wmi_ev_lock, flags);
1014
1015         return ret;
1016 }
1017
1018 /*
1019  * Handler for the WMI events
1020  */
1021 void wmi_event_worker(struct work_struct *work)
1022 {
1023         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
1024                                                  wmi_event_worker);
1025         struct pending_wmi_event *evt;
1026         struct list_head *lh;
1027
1028         while ((lh = next_wmi_ev(wil)) != NULL) {
1029                 evt = list_entry(lh, struct pending_wmi_event, list);
1030                 wmi_event_handle(wil, &evt->event.hdr);
1031                 kfree(evt);
1032         }
1033 }
1034
1035 void wmi_connect_worker(struct work_struct *work)
1036 {
1037         int rc;
1038         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
1039                                                 wmi_connect_worker);
1040
1041         if (wil->pending_connect_cid < 0) {
1042                 wil_err(wil, "No connection pending\n");
1043                 return;
1044         }
1045
1046         wil_dbg_wmi(wil, "Configure for connection CID %d\n",
1047                     wil->pending_connect_cid);
1048
1049         rc = wil_vring_init_tx(wil, 0, WIL6210_TX_RING_SIZE,
1050                                wil->pending_connect_cid, 0);
1051         wil->pending_connect_cid = -1;
1052         if (rc == 0)
1053                 wil_link_on(wil);
1054 }