sys/dev/netif/iwi/if_iwi.c

   1 /*-
   2  * Copyright (c) 2004, 2005
   3  *      Damien Bergamini <damien.bergamini@free.fr>. All rights reserved.
   4  * Copyright (c) 2005-2006 Sam Leffler, Errno Consulting
   5  * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice unmodified, this list of conditions, and the following
  12  *    disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/sys/dev/iwi/if_iwi.c,v 1.72 2009/07/10 15:28:33 rpaulo Exp $
  30  */
  31
  32 /*-
  33  * Intel(R) PRO/Wireless 2200BG/2225BG/2915ABG driver
  34  * http://www.intel.com/network/connectivity/products/wireless/prowireless_mobile.htm
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/sysctl.h>
  39 #include <sys/sockio.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/kernel.h>
  42 #include <sys/socket.h>
  43 #include <sys/systm.h>
  44 #include <sys/malloc.h>
  45 #include <sys/lock.h>
  46 #include <sys/mutex.h>
  47 #include <sys/module.h>
  48 #include <sys/bus.h>
  49 #include <sys/endian.h>
  50 #include <sys/proc.h>
  51 #include <sys/mount.h>
  52 #include <sys/namei.h>
  53 #include <sys/linker.h>
  54 #include <sys/firmware.h>
  55 #include <sys/taskqueue.h>
  56 #include <sys/devfs.h>
  57
  58 #include <sys/resource.h>
  59 #include <sys/rman.h>
  60
  61 #include <bus/pci/pcireg.h>
  62 #include <bus/pci/pcivar.h>
  63
  64 #include <net/bpf.h>
  65 #include <net/if.h>
  66 #include <net/if_arp.h>
  67 #include <net/ethernet.h>
  68 #include <net/if_dl.h>
  69 #include <net/if_media.h>
  70 #include <net/if_types.h>
  71 #include <net/ifq_var.h>
  72
  73 #include <netproto/802_11/ieee80211_var.h>
  74 #include <netproto/802_11/ieee80211_radiotap.h>
  75 #include <netproto/802_11/ieee80211_input.h>
  76 #include <netproto/802_11/ieee80211_regdomain.h>
  77
  78 #include <netinet/in.h>
  79 #include <netinet/in_systm.h>
  80 #include <netinet/in_var.h>
  81 #include <netinet/ip.h>
  82 #include <netinet/if_ether.h>
  83
  84 #include <dev/netif/iwi/if_iwireg.h>
  85 #include <dev/netif/iwi/if_iwivar.h>
  86
  87 #define IWI_DEBUG
  88 #ifdef IWI_DEBUG
  89 #define DPRINTF(x)      do { if (iwi_debug > 0) kprintf x; } while (0)
  90 #define DPRINTFN(n, x)  do { if (iwi_debug >= (n)) kprintf x; } while (0)
  91 int iwi_debug = 0;
  92 SYSCTL_INT(_debug, OID_AUTO, iwi, CTLFLAG_RW, &iwi_debug, 0, "iwi debug level");
  93
  94 static const char *iwi_fw_states[] = {
  95         "IDLE",                 /* IWI_FW_IDLE */
  96         "LOADING",              /* IWI_FW_LOADING */
  97         "ASSOCIATING",          /* IWI_FW_ASSOCIATING */
  98         "DISASSOCIATING",       /* IWI_FW_DISASSOCIATING */
  99         "SCANNING",             /* IWI_FW_SCANNING */
 100 };
 101 #else
 102 #define DPRINTF(x)
 103 #define DPRINTFN(n, x)
 104 #endif
 105
 106 MODULE_DEPEND(iwi, pci,  1, 1, 1);
 107 MODULE_DEPEND(iwi, wlan, 1, 1, 1);
 108 MODULE_DEPEND(iwi, firmware, 1, 1, 1);
 109
 110 enum {
 111         IWI_LED_TX,
 112         IWI_LED_RX,
 113         IWI_LED_POLL,
 114 };
 115
 116 struct iwi_ident {
 117         uint16_t        vendor;
 118         uint16_t        device;
 119         const char      *name;
 120 };
 121
 122 static const struct iwi_ident iwi_ident_table[] = {
 123         { 0x8086, 0x4220, "Intel(R) PRO/Wireless 2200BG" },
 124         { 0x8086, 0x4221, "Intel(R) PRO/Wireless 2225BG" },
 125         { 0x8086, 0x4223, "Intel(R) PRO/Wireless 2915ABG" },
 126         { 0x8086, 0x4224, "Intel(R) PRO/Wireless 2915ABG" },
 127
 128         { 0, 0, NULL }
 129 };
 130
 131 static struct ieee80211vap *iwi_vap_create(struct ieee80211com *,
 132                     const char name[IFNAMSIZ], int unit, int opmode, int flags,
 133                     const uint8_t bssid[IEEE80211_ADDR_LEN],
 134                     const uint8_t mac[IEEE80211_ADDR_LEN]);
 135 static void     iwi_vap_delete(struct ieee80211vap *);
 136 static void     iwi_dma_map_addr(void *, bus_dma_segment_t *, int, int);
 137 static int      iwi_alloc_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *,
 138                     int);
 139 static void     iwi_reset_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 140 static void     iwi_free_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 141 static int      iwi_alloc_tx_ring(struct iwi_softc *, struct iwi_tx_ring *,
 142                     int, bus_addr_t, bus_addr_t);
 143 static void     iwi_reset_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 144 static void     iwi_free_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 145 static int      iwi_alloc_rx_ring(struct iwi_softc *, struct iwi_rx_ring *,
 146                     int);
 147 static void     iwi_reset_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 148 static void     iwi_free_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 149 static struct ieee80211_node *iwi_node_alloc(struct ieee80211vap *,
 150                     const uint8_t [IEEE80211_ADDR_LEN]);
 151 static void     iwi_node_free(struct ieee80211_node *);
 152 static void     iwi_media_status(struct ifnet *, struct ifmediareq *);
 153 static int      iwi_newstate(struct ieee80211vap *, enum ieee80211_state, int);
 154 static void     iwi_wme_init(struct iwi_softc *);
 155 static int      iwi_wme_setparams(struct iwi_softc *, struct ieee80211com *);
 156 static void     iwi_update_wme_task(void *, int);
 157 static int      iwi_wme_update(struct ieee80211com *);
 158 static uint16_t iwi_read_prom_word(struct iwi_softc *, uint8_t);
 159 static void     iwi_frame_intr(struct iwi_softc *, struct iwi_rx_data *, int,
 160                     struct iwi_frame *);
 161 static void     iwi_notification_intr(struct iwi_softc *, struct iwi_notif *);
 162 static void     iwi_rx_intr(struct iwi_softc *);
 163 static void     iwi_tx_intr(struct iwi_softc *, struct iwi_tx_ring *);
 164 static void     iwi_intr(void *);
 165 static int      iwi_cmd(struct iwi_softc *, uint8_t, void *, uint8_t);
 166 static void     iwi_write_ibssnode(struct iwi_softc *, const u_int8_t [], int);
 167 static int      iwi_tx_start(struct ifnet *, struct mbuf *,
 168                     struct ieee80211_node *, int);
 169 static int      iwi_raw_xmit(struct ieee80211_node *, struct mbuf *,
 170                     const struct ieee80211_bpf_params *);
 171 static void     iwi_start_locked(struct ifnet *);
 172 static void     iwi_start(struct ifnet *);
 173 static void     iwi_watchdog(void *);
 174 static int      iwi_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *ucred);
 175 static void     iwi_stop_master(struct iwi_softc *);
 176 static int      iwi_reset(struct iwi_softc *);
 177 static int      iwi_load_ucode(struct iwi_softc *, const struct iwi_fw *);
 178 static int      iwi_load_firmware(struct iwi_softc *, const struct iwi_fw *);
 179 static void     iwi_release_fw_dma(struct iwi_softc *sc);
 180 static int      iwi_config(struct iwi_softc *);
 181 static int      iwi_get_firmware(struct iwi_softc *, enum ieee80211_opmode);
 182 static void     iwi_put_firmware(struct iwi_softc *);
 183 static int      iwi_scanchan(struct iwi_softc *, unsigned long, int);
 184 static void     iwi_scan_start(struct ieee80211com *);
 185 static void     iwi_scan_end(struct ieee80211com *);
 186 static void     iwi_set_channel(struct ieee80211com *);
 187 static void     iwi_scan_curchan(struct ieee80211_scan_state *, unsigned long maxdwell);
 188 static void     iwi_scan_mindwell(struct ieee80211_scan_state *);
 189 static int      iwi_auth_and_assoc(struct iwi_softc *, struct ieee80211vap *);
 190 static void     iwi_disassoc_task(void *, int);
 191 static int      iwi_disassociate(struct iwi_softc *, int quiet);
 192 static void     iwi_init_locked(struct iwi_softc *);
 193 static void     iwi_init(void *);
 194 static int      iwi_init_fw_dma(struct iwi_softc *, int);
 195 static void     iwi_stop_locked(void *);
 196 static void     iwi_stop(struct iwi_softc *);
 197 static void     iwi_restart_task(void *, int);
 198 static int      iwi_getrfkill(struct iwi_softc *);
 199 static void     iwi_radio_on_task(void *, int);
 200 static void     iwi_radio_off_task(void *, int);
 201 static void     iwi_sysctlattach(struct iwi_softc *);
 202 static void     iwi_led_event(struct iwi_softc *, int);
 203 static void     iwi_ledattach(struct iwi_softc *);
 204
 205 static int iwi_probe(device_t);
 206 static int iwi_attach(device_t);
 207 static int iwi_detach(device_t);
 208 static int iwi_shutdown(device_t);
 209 static int iwi_suspend(device_t);
 210 static int iwi_resume(device_t);
 211
 212 static device_method_t iwi_methods[] = {
 213         /* Device interface */
 214         DEVMETHOD(device_probe,         iwi_probe),
 215         DEVMETHOD(device_attach,        iwi_attach),
 216         DEVMETHOD(device_detach,        iwi_detach),
 217         DEVMETHOD(device_shutdown,      iwi_shutdown),
 218         DEVMETHOD(device_suspend,       iwi_suspend),
 219         DEVMETHOD(device_resume,        iwi_resume),
 220
 221         { 0, 0 }
 222 };
 223
 224 static driver_t iwi_driver = {
 225         "iwi",
 226         iwi_methods,
 227         sizeof (struct iwi_softc)
 228 };
 229
 230 static devclass_t iwi_devclass;
 231
 232 DRIVER_MODULE(iwi, pci, iwi_driver, iwi_devclass, NULL, NULL);
 233
 234 static __inline uint8_t
 235 MEM_READ_1(struct iwi_softc *sc, uint32_t addr)
 236 {
 237         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 238         return CSR_READ_1(sc, IWI_CSR_INDIRECT_DATA);
 239 }
 240
 241 static __inline uint32_t
 242 MEM_READ_4(struct iwi_softc *sc, uint32_t addr)
 243 {
 244         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 245         return CSR_READ_4(sc, IWI_CSR_INDIRECT_DATA);
 246 }
 247
 248 static int
 249 iwi_probe(device_t dev)
 250 {
 251         const struct iwi_ident *ident;
 252
 253         wlan_serialize_enter();
 254         for (ident = iwi_ident_table; ident->name != NULL; ident++) {
 255                 if (pci_get_vendor(dev) == ident->vendor &&
 256                     pci_get_device(dev) == ident->device) {
 257                         device_set_desc(dev, ident->name);
 258                         wlan_serialize_exit();
 259                         return 0;
 260                 }
 261         }
 262         wlan_serialize_exit();
 263         return ENXIO;
 264 }
 265
 266 /* Base Address Register */
 267 #define IWI_PCI_BAR0    0x10
 268
 269 static int
 270 iwi_attach(device_t dev)
 271 {
 272         struct iwi_softc *sc = device_get_softc(dev);
 273         struct ifnet *ifp;
 274         struct ieee80211com *ic;
 275         uint16_t val;
 276         int i, error;
 277         uint8_t bands;
 278         uint8_t macaddr[IEEE80211_ADDR_LEN];
 279
 280         wlan_serialize_enter();
 281
 282         sc->sc_dev = dev;
 283
 284         ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211);
 285         if (ifp == NULL) {
 286                 device_printf(dev, "can not if_alloc()\n");
 287                 wlan_serialize_exit();
 288                 return ENXIO;
 289         }
 290         ic = ifp->if_l2com;
 291
 292         devfs_clone_bitmap_init(&sc->sc_unr);
 293
 294         TASK_INIT(&sc->sc_radiontask, 0, iwi_radio_on_task, sc);
 295         TASK_INIT(&sc->sc_radiofftask, 0, iwi_radio_off_task, sc);
 296         TASK_INIT(&sc->sc_restarttask, 0, iwi_restart_task, sc);
 297         TASK_INIT(&sc->sc_disassoctask, 0, iwi_disassoc_task, sc);
 298         TASK_INIT(&sc->sc_wmetask, 0, iwi_update_wme_task, sc);
 299
 300         callout_init(&sc->sc_wdtimer_callout);
 301         callout_init(&sc->sc_rftimer_callout);
 302
 303         if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
 304                 device_printf(dev, "chip is in D%d power mode "
 305                     "-- setting to D0\n", pci_get_powerstate(dev));
 306                 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
 307         }
 308
 309         pci_write_config(dev, 0x41, 0, 1);
 310
 311         /* enable bus-mastering */
 312         pci_enable_busmaster(dev);
 313
 314         sc->mem_rid = IWI_PCI_BAR0;
 315         sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid,
 316             RF_ACTIVE);
 317         if (sc->mem == NULL) {
 318                 device_printf(dev, "could not allocate memory resource\n");
 319                 goto fail;
 320         }
 321
 322         sc->sc_st = rman_get_bustag(sc->mem);
 323         sc->sc_sh = rman_get_bushandle(sc->mem);
 324
 325         sc->irq_rid = 0;
 326         sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
 327             RF_ACTIVE | RF_SHAREABLE);
 328         if (sc->irq == NULL) {
 329                 device_printf(dev, "could not allocate interrupt resource\n");
 330                 goto fail;
 331         }
 332
 333         if (iwi_reset(sc) != 0) {
 334                 device_printf(dev, "could not reset adapter\n");
 335                 goto fail;
 336         }
 337
 338         /*
 339          * Allocate rings.
 340          */
 341         if (iwi_alloc_cmd_ring(sc, &sc->cmdq, IWI_CMD_RING_COUNT) != 0) {
 342                 device_printf(dev, "could not allocate Cmd ring\n");
 343                 goto fail;
 344         }
 345
 346         for (i = 0; i < 4; i++) {
 347                 error = iwi_alloc_tx_ring(sc, &sc->txq[i], IWI_TX_RING_COUNT,
 348                     IWI_CSR_TX1_RIDX + i * 4,
 349                     IWI_CSR_TX1_WIDX + i * 4);
 350                 if (error != 0) {
 351                         device_printf(dev, "could not allocate Tx ring %d\n",
 352                                 i+i);
 353                         goto fail;
 354                 }
 355         }
 356
 357         if (iwi_alloc_rx_ring(sc, &sc->rxq, IWI_RX_RING_COUNT) != 0) {
 358                 device_printf(dev, "could not allocate Rx ring\n");
 359                 goto fail;
 360         }
 361
 362         iwi_wme_init(sc);
 363
 364         ifp->if_softc = sc;
 365         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 366         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
 367         ifp->if_init = iwi_init;
 368         ifp->if_ioctl = iwi_ioctl;
 369         ifp->if_start = iwi_start;
 370         ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
 371         ifq_set_ready(&ifp->if_snd);
 372
 373         ic->ic_ifp = ifp;
 374         ic->ic_opmode = IEEE80211_M_STA;
 375         ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
 376
 377         /* set device capabilities */
 378         ic->ic_caps =
 379               IEEE80211_C_STA           /* station mode supported */
 380             | IEEE80211_C_IBSS          /* IBSS mode supported */
 381             | IEEE80211_C_MONITOR       /* monitor mode supported */
 382             | IEEE80211_C_PMGT          /* power save supported */
 383             | IEEE80211_C_SHPREAMBLE    /* short preamble supported */
 384             | IEEE80211_C_WPA           /* 802.11i */
 385             | IEEE80211_C_WME           /* 802.11e */
 386 #if 0
 387             | IEEE80211_C_BGSCAN        /* capable of bg scanning */
 388 #endif
 389             ;
 390
 391         /* read MAC address from EEPROM */
 392         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 0);
 393         macaddr[0] = val & 0xff;
 394         macaddr[1] = val >> 8;
 395         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 1);
 396         macaddr[2] = val & 0xff;
 397         macaddr[3] = val >> 8;
 398         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 2);
 399         macaddr[4] = val & 0xff;
 400         macaddr[5] = val >> 8;
 401
 402         bands = 0;
 403         setbit(&bands, IEEE80211_MODE_11B);
 404         setbit(&bands, IEEE80211_MODE_11G);
 405         if (pci_get_device(dev) >= 0x4223)
 406                 setbit(&bands, IEEE80211_MODE_11A);
 407         ieee80211_init_channels(ic, NULL, &bands);
 408
 409         ieee80211_ifattach(ic, macaddr);
 410         /* override default methods */
 411         ic->ic_node_alloc = iwi_node_alloc;
 412         sc->sc_node_free = ic->ic_node_free;
 413         ic->ic_node_free = iwi_node_free;
 414         ic->ic_raw_xmit = iwi_raw_xmit;
 415         ic->ic_scan_start = iwi_scan_start;
 416         ic->ic_scan_end = iwi_scan_end;
 417         ic->ic_set_channel = iwi_set_channel;
 418         ic->ic_scan_curchan = iwi_scan_curchan;
 419         ic->ic_scan_mindwell = iwi_scan_mindwell;
 420         ic->ic_wme.wme_update = iwi_wme_update;
 421
 422         ic->ic_vap_create = iwi_vap_create;
 423         ic->ic_vap_delete = iwi_vap_delete;
 424
 425         ieee80211_radiotap_attach(ic,
 426             &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
 427                 IWI_TX_RADIOTAP_PRESENT,
 428             &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
 429                 IWI_RX_RADIOTAP_PRESENT);
 430
 431         iwi_sysctlattach(sc);
 432         iwi_ledattach(sc);
 433
 434         /*
 435          * Hook our interrupt after all initialization is complete.
 436          */
 437         error = bus_setup_intr(dev, sc->irq, INTR_MPSAFE,
 438             iwi_intr, sc, &sc->sc_ih, &wlan_global_serializer);
 439         if (error != 0) {
 440                 device_printf(dev, "could not set up interrupt\n");
 441                 goto fail;
 442         }
 443
 444         if (bootverbose)
 445                 ieee80211_announce(ic);
 446
 447         wlan_serialize_exit();
 448         return 0;
 449 fail:
 450         /* XXX fix */
 451         wlan_serialize_exit();
 452         iwi_detach(dev);
 453         return ENXIO;
 454 }
 455
 456 static int
 457 iwi_detach(device_t dev)
 458 {
 459         struct iwi_softc *sc = device_get_softc(dev);
 460         struct ifnet *ifp = sc->sc_ifp;
 461         struct ieee80211com *ic = ifp->if_l2com;
 462
 463         wlan_serialize_enter();
 464
 465         /* NB: do early to drain any pending tasks */
 466         ieee80211_draintask(ic, &sc->sc_radiontask);
 467         ieee80211_draintask(ic, &sc->sc_radiofftask);
 468         ieee80211_draintask(ic, &sc->sc_restarttask);
 469         ieee80211_draintask(ic, &sc->sc_disassoctask);
 470
 471         iwi_stop(sc);
 472
 473         ieee80211_ifdetach(ic);
 474
 475         iwi_put_firmware(sc);
 476         iwi_release_fw_dma(sc);
 477
 478         iwi_free_cmd_ring(sc, &sc->cmdq);
 479         iwi_free_tx_ring(sc, &sc->txq[0]);
 480         iwi_free_tx_ring(sc, &sc->txq[1]);
 481         iwi_free_tx_ring(sc, &sc->txq[2]);
 482         iwi_free_tx_ring(sc, &sc->txq[3]);
 483         iwi_free_rx_ring(sc, &sc->rxq);
 484
 485         bus_teardown_intr(dev, sc->irq, sc->sc_ih);
 486         bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, sc->irq);
 487
 488         bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, sc->mem);
 489
 490         devfs_clone_bitmap_uninit(&sc->sc_unr);
 491
 492         if (sc->sc_sysctl_tree != NULL)
 493                 sysctl_ctx_free(&sc->sc_sysctl_ctx);
 494
 495         if_free(ifp);
 496
 497         wlan_serialize_exit();
 498         return 0;
 499 }
 500
 501 static struct ieee80211vap *
 502 iwi_vap_create(struct ieee80211com *ic,
 503         const char name[IFNAMSIZ], int unit, int opmode, int flags,
 504         const uint8_t bssid[IEEE80211_ADDR_LEN],
 505         const uint8_t mac[IEEE80211_ADDR_LEN])
 506 {
 507         struct ifnet *ifp = ic->ic_ifp;
 508         struct iwi_softc *sc = ifp->if_softc;
 509         struct iwi_vap *ivp;
 510         struct ieee80211vap *vap;
 511         int i;
 512
 513         if (!TAILQ_EMPTY(&ic->ic_vaps))         /* only one at a time */
 514                 return NULL;
 515         /*
 516          * Get firmware image (and possibly dma memory) on mode change.
 517          */
 518         if (iwi_get_firmware(sc, opmode))
 519                 return NULL;
 520         /* allocate DMA memory for mapping firmware image */
 521         i = sc->fw_fw.size;
 522         if (sc->fw_boot.size > i)
 523                 i = sc->fw_boot.size;
 524         /* XXX do we dma the ucode as well ? */
 525         if (sc->fw_uc.size > i)
 526                 i = sc->fw_uc.size;
 527         if (iwi_init_fw_dma(sc, i))
 528                 return NULL;
 529
 530         ivp = (struct iwi_vap *) kmalloc(sizeof(struct iwi_vap),
 531             M_80211_VAP, M_WAITOK | M_ZERO);
 532         if (ivp == NULL)
 533                 return NULL;
 534         vap = &ivp->iwi_vap;
 535         ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
 536         /* override the default, the setting comes from the linux driver */
 537         vap->iv_bmissthreshold = 24;
 538         /* override with driver methods */
 539         ivp->iwi_newstate = vap->iv_newstate;
 540         vap->iv_newstate = iwi_newstate;
 541
 542         /* complete setup */
 543         ieee80211_vap_attach(vap, ieee80211_media_change, iwi_media_status);
 544         ic->ic_opmode = opmode;
 545         return vap;
 546 }
 547
 548 static void
 549 iwi_vap_delete(struct ieee80211vap *vap)
 550 {
 551         struct iwi_vap *ivp = IWI_VAP(vap);
 552
 553         ieee80211_vap_detach(vap);
 554         kfree(ivp, M_80211_VAP);
 555 }
 556
 557 static void
 558 iwi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 559 {
 560         if (error != 0)
 561                 return;
 562
 563         KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
 564
 565         *(bus_addr_t *)arg = segs[0].ds_addr;
 566 }
 567
 568 static int
 569 iwi_alloc_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring, int count)
 570 {
 571         int error;
 572
 573         ring->count = count;
 574         ring->queued = 0;
 575         ring->cur = ring->next = 0;
 576
 577         error = bus_dma_tag_create(NULL, 4, 0,
 578             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 579             count * IWI_CMD_DESC_SIZE, 1, count * IWI_CMD_DESC_SIZE,
 580             0 , &ring->desc_dmat);
 581         if (error != 0) {
 582                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 583                 goto fail;
 584         }
 585
 586         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 587             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 588         if (error != 0) {
 589                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 590                 goto fail;
 591         }
 592
 593         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 594             count * IWI_CMD_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 595         if (error != 0) {
 596                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 597                 goto fail;
 598         }
 599
 600         return 0;
 601
 602 fail:   iwi_free_cmd_ring(sc, ring);
 603         return error;
 604 }
 605
 606 static void
 607 iwi_reset_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 608 {
 609         ring->queued = 0;
 610         ring->cur = ring->next = 0;
 611 }
 612
 613 static void
 614 iwi_free_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 615 {
 616         if (ring->desc != NULL) {
 617                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 618                     BUS_DMASYNC_POSTWRITE);
 619                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 620                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 621         }
 622
 623         if (ring->desc_dmat != NULL)
 624                 bus_dma_tag_destroy(ring->desc_dmat);
 625 }
 626
 627 static int
 628 iwi_alloc_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring, int count,
 629     bus_addr_t csr_ridx, bus_addr_t csr_widx)
 630 {
 631         int i, error;
 632
 633         ring->count = count;
 634         ring->queued = 0;
 635         ring->cur = ring->next = 0;
 636         ring->csr_ridx = csr_ridx;
 637         ring->csr_widx = csr_widx;
 638
 639         error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT,
 640             BUS_SPACE_MAXADDR, NULL, NULL, count * IWI_TX_DESC_SIZE, 1,
 641             count * IWI_TX_DESC_SIZE, 0, &ring->desc_dmat);
 642         if (error != 0) {
 643                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 644                 goto fail;
 645         }
 646
 647         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 648             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 649         if (error != 0) {
 650                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 651                 goto fail;
 652         }
 653
 654         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 655             count * IWI_TX_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 656         if (error != 0) {
 657                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 658                 goto fail;
 659         }
 660
 661         ring->data = kmalloc(count * sizeof (struct iwi_tx_data), M_DEVBUF,
 662             M_WAITOK | M_ZERO);
 663
 664         error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT,
 665             BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, IWI_MAX_NSEG,
 666             MCLBYTES, 0, &ring->data_dmat);
 667         if (error != 0) {
 668                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 669                 goto fail;
 670         }
 671
 672         for (i = 0; i < count; i++) {
 673                 error = bus_dmamap_create(ring->data_dmat, 0,
 674                     &ring->data[i].map);
 675                 if (error != 0) {
 676                         device_printf(sc->sc_dev, "could not create DMA map\n");
 677                         goto fail;
 678                 }
 679         }
 680
 681         return 0;
 682
 683 fail:   iwi_free_tx_ring(sc, ring);
 684         return error;
 685 }
 686
 687 static void
 688 iwi_reset_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 689 {
 690         struct iwi_tx_data *data;
 691         int i;
 692
 693         for (i = 0; i < ring->count; i++) {
 694                 data = &ring->data[i];
 695
 696                 if (data->m != NULL) {
 697                         bus_dmamap_sync(ring->data_dmat, data->map,
 698                             BUS_DMASYNC_POSTWRITE);
 699                         bus_dmamap_unload(ring->data_dmat, data->map);
 700                         m_freem(data->m);
 701                         data->m = NULL;
 702                 }
 703
 704                 if (data->ni != NULL) {
 705                         ieee80211_free_node(data->ni);
 706                         data->ni = NULL;
 707                 }
 708         }
 709
 710         ring->queued = 0;
 711         ring->cur = ring->next = 0;
 712 }
 713
 714 static void
 715 iwi_free_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 716 {
 717         struct iwi_tx_data *data;
 718         int i;
 719
 720         if (ring->desc != NULL) {
 721                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 722                     BUS_DMASYNC_POSTWRITE);
 723                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 724                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 725         }
 726
 727         if (ring->desc_dmat != NULL)
 728                 bus_dma_tag_destroy(ring->desc_dmat);
 729
 730         if (ring->data != NULL) {
 731                 for (i = 0; i < ring->count; i++) {
 732                         data = &ring->data[i];
 733
 734                         if (data->m != NULL) {
 735                                 bus_dmamap_sync(ring->data_dmat, data->map,
 736                                     BUS_DMASYNC_POSTWRITE);
 737                                 bus_dmamap_unload(ring->data_dmat, data->map);
 738                                 m_freem(data->m);
 739                         }
 740
 741                         if (data->ni != NULL)
 742                                 ieee80211_free_node(data->ni);
 743
 744                         if (data->map != NULL)
 745                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 746                 }
 747
 748                 kfree(ring->data, M_DEVBUF);
 749         }
 750
 751         if (ring->data_dmat != NULL)
 752                 bus_dma_tag_destroy(ring->data_dmat);
 753 }
 754
 755 static int
 756 iwi_alloc_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring, int count)
 757 {
 758         struct iwi_rx_data *data;
 759         int i, error;
 760
 761         ring->count = count;
 762         ring->cur = 0;
 763
 764         ring->data = kmalloc(count * sizeof (struct iwi_rx_data), M_DEVBUF,
 765             M_WAITOK | M_ZERO);
 766
 767         error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT,
 768             BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, MCLBYTES,
 769             0, &ring->data_dmat);
 770         if (error != 0) {
 771                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 772                 goto fail;
 773         }
 774
 775         for (i = 0; i < count; i++) {
 776                 data = &ring->data[i];
 777
 778                 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
 779                 if (error != 0) {
 780                         device_printf(sc->sc_dev, "could not create DMA map\n");
 781                         goto fail;
 782                 }
 783
 784                 data->m = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
 785                 if (data->m == NULL) {
 786                         device_printf(sc->sc_dev,
 787                             "could not allocate rx mbuf\n");
 788                         error = ENOMEM;
 789                         goto fail;
 790                 }
 791
 792                 error = bus_dmamap_load(ring->data_dmat, data->map,
 793                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
 794                     &data->physaddr, 0);
 795                 if (error != 0) {
 796                         device_printf(sc->sc_dev,
 797                             "could not load rx buf DMA map");
 798                         goto fail;
 799                 }
 800
 801                 data->reg = IWI_CSR_RX_BASE + i * 4;
 802         }
 803
 804         return 0;
 805
 806 fail:   iwi_free_rx_ring(sc, ring);
 807         return error;
 808 }
 809
 810 static void
 811 iwi_reset_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 812 {
 813         ring->cur = 0;
 814 }
 815
 816 static void
 817 iwi_free_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 818 {
 819         struct iwi_rx_data *data;
 820         int i;
 821
 822         if (ring->data != NULL) {
 823                 for (i = 0; i < ring->count; i++) {
 824                         data = &ring->data[i];
 825
 826                         if (data->m != NULL) {
 827                                 bus_dmamap_sync(ring->data_dmat, data->map,
 828                                     BUS_DMASYNC_POSTREAD);
 829                                 bus_dmamap_unload(ring->data_dmat, data->map);
 830                                 m_freem(data->m);
 831                         }
 832
 833                         if (data->map != NULL)
 834                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 835                 }
 836
 837                 kfree(ring->data, M_DEVBUF);
 838         }
 839
 840         if (ring->data_dmat != NULL)
 841                 bus_dma_tag_destroy(ring->data_dmat);
 842 }
 843
 844 static int
 845 iwi_shutdown(device_t dev)
 846 {
 847         struct iwi_softc *sc = device_get_softc(dev);
 848
 849         wlan_serialize_enter();
 850         iwi_stop(sc);
 851         iwi_put_firmware(sc);           /* ??? XXX */
 852         wlan_serialize_exit();
 853
 854         return 0;
 855 }
 856
 857 static int
 858 iwi_suspend(device_t dev)
 859 {
 860         struct iwi_softc *sc = device_get_softc(dev);
 861
 862         wlan_serialize_enter();
 863         iwi_stop(sc);
 864         wlan_serialize_exit();
 865
 866         return 0;
 867 }
 868
 869 static int
 870 iwi_resume(device_t dev)
 871 {
 872         struct iwi_softc *sc = device_get_softc(dev);
 873         struct ifnet *ifp = sc->sc_ifp;
 874
 875         wlan_serialize_enter();
 876         pci_write_config(dev, 0x41, 0, 1);
 877
 878         if (ifp->if_flags & IFF_UP)
 879                 iwi_init(sc);
 880
 881         wlan_serialize_exit();
 882         return 0;
 883 }
 884
 885 static struct ieee80211_node *
 886 iwi_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN])
 887 {
 888         struct iwi_node *in;
 889
 890         in = kmalloc(sizeof (struct iwi_node), M_80211_NODE, M_NOWAIT | M_ZERO);
 891         if (in == NULL)
 892                 return NULL;
 893         /* XXX assign sta table entry for adhoc */
 894         in->in_station = -1;
 895
 896         return &in->in_node;
 897 }
 898
 899 static void
 900 iwi_node_free(struct ieee80211_node *ni)
 901 {
 902         struct ieee80211com *ic = ni->ni_ic;
 903         struct iwi_softc *sc = ic->ic_ifp->if_softc;
 904         struct iwi_node *in = (struct iwi_node *)ni;
 905
 906         if (in->in_station != -1) {
 907                 DPRINTF(("%s mac %6D station %u\n", __func__,
 908                     ni->ni_macaddr, ":", in->in_station));
 909                 devfs_clone_bitmap_put(&sc->sc_unr, in->in_station);
 910         }
 911
 912         sc->sc_node_free(ni);
 913 }
 914
 915 /*
 916  * Convert h/w rate code to IEEE rate code.
 917  */
 918 static int
 919 iwi_cvtrate(int iwirate)
 920 {
 921         switch (iwirate) {
 922         case IWI_RATE_DS1:      return 2;
 923         case IWI_RATE_DS2:      return 4;
 924         case IWI_RATE_DS5:      return 11;
 925         case IWI_RATE_DS11:     return 22;
 926         case IWI_RATE_OFDM6:    return 12;
 927         case IWI_RATE_OFDM9:    return 18;
 928         case IWI_RATE_OFDM12:   return 24;
 929         case IWI_RATE_OFDM18:   return 36;
 930         case IWI_RATE_OFDM24:   return 48;
 931         case IWI_RATE_OFDM36:   return 72;
 932         case IWI_RATE_OFDM48:   return 96;
 933         case IWI_RATE_OFDM54:   return 108;
 934         }
 935         return 0;
 936 }
 937
 938 /*
 939  * The firmware automatically adapts the transmit speed.  We report its current
 940  * value here.
 941  */
 942 static void
 943 iwi_media_status(struct ifnet *ifp, struct ifmediareq *imr)
 944 {
 945         struct ieee80211vap *vap = ifp->if_softc;
 946         struct ieee80211com *ic = vap->iv_ic;
 947         struct iwi_softc *sc = ic->ic_ifp->if_softc;
 948
 949         /* read current transmission rate from adapter */
 950         vap->iv_bss->ni_txrate =
 951             iwi_cvtrate(CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE));
 952         ieee80211_media_status(ifp, imr);
 953 }
 954
 955 static int
 956 iwi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 957 {
 958         struct iwi_vap *ivp = IWI_VAP(vap);
 959         struct ieee80211com *ic = vap->iv_ic;
 960         struct ifnet *ifp = ic->ic_ifp;
 961         struct iwi_softc *sc = ifp->if_softc;
 962
 963         DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__,
 964                 ieee80211_state_name[vap->iv_state],
 965                 ieee80211_state_name[nstate], sc->flags));
 966
 967         switch (nstate) {
 968         case IEEE80211_S_INIT:
 969                 /*
 970                  * NB: don't try to do this if iwi_stop_master has
 971                  *     shutdown the firmware and disabled interrupts.
 972                  */
 973                 if (vap->iv_state == IEEE80211_S_RUN &&
 974                     (sc->flags & IWI_FLAG_FW_INITED))
 975                         iwi_disassociate(sc, 0);
 976                 break;
 977         case IEEE80211_S_AUTH:
 978                 iwi_auth_and_assoc(sc, vap);
 979                 break;
 980         case IEEE80211_S_RUN:
 981                 if (vap->iv_opmode == IEEE80211_M_IBSS &&
 982                     vap->iv_state == IEEE80211_S_SCAN) {
 983                         /*
 984                          * XXX when joining an ibss network we are called
 985                          * with a SCAN -> RUN transition on scan complete.
 986                          * Use that to call iwi_auth_and_assoc.  On completing
 987                          * the join we are then called again with an
 988                          * AUTH -> RUN transition and we want to do nothing.
 989                          * This is all totally bogus and needs to be redone.
 990                          */
 991                         iwi_auth_and_assoc(sc, vap);
 992                 }
 993                 break;
 994         case IEEE80211_S_ASSOC:
 995                 /*
 996                  * If we are transitioning from AUTH then just wait
 997                  * for the ASSOC status to come back from the firmware.
 998                  * Otherwise we need to issue the association request.
 999                  */
1000                 if (vap->iv_state == IEEE80211_S_AUTH)
1001                         break;
1002                 iwi_auth_and_assoc(sc, vap);
1003                 break;
1004         default:
1005                 break;
1006         }
1007
1008         return ivp->iwi_newstate(vap, nstate, arg);
1009 }
1010
1011 /*
1012  * WME parameters coming from IEEE 802.11e specification.  These values are
1013  * already declared in ieee80211_proto.c, but they are static so they can't
1014  * be reused here.
1015  */
1016 static const struct wmeParams iwi_wme_cck_params[WME_NUM_AC] = {
1017         { 0, 3, 5,  7,   0 },   /* WME_AC_BE */
1018         { 0, 3, 5, 10,   0 },   /* WME_AC_BK */
1019         { 0, 2, 4,  5, 188 },   /* WME_AC_VI */
1020         { 0, 2, 3,  4, 102 }    /* WME_AC_VO */
1021 };
1022
1023 static const struct wmeParams iwi_wme_ofdm_params[WME_NUM_AC] = {
1024         { 0, 3, 4,  6,   0 },   /* WME_AC_BE */
1025         { 0, 3, 4, 10,   0 },   /* WME_AC_BK */
1026         { 0, 2, 3,  4,  94 },   /* WME_AC_VI */
1027         { 0, 2, 2,  3,  47 }    /* WME_AC_VO */
1028 };
1029 #define IWI_EXP2(v)     htole16((1 << (v)) - 1)
1030 #define IWI_USEC(v)     htole16(IEEE80211_TXOP_TO_US(v))
1031
1032 static void
1033 iwi_wme_init(struct iwi_softc *sc)
1034 {
1035         const struct wmeParams *wmep;
1036         int ac;
1037
1038         memset(sc->wme, 0, sizeof sc->wme);
1039         for (ac = 0; ac < WME_NUM_AC; ac++) {
1040                 /* set WME values for CCK modulation */
1041                 wmep = &iwi_wme_cck_params[ac];
1042                 sc->wme[1].aifsn[ac] = wmep->wmep_aifsn;
1043                 sc->wme[1].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1044                 sc->wme[1].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1045                 sc->wme[1].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1046                 sc->wme[1].acm[ac]   = wmep->wmep_acm;
1047
1048                 /* set WME values for OFDM modulation */
1049                 wmep = &iwi_wme_ofdm_params[ac];
1050                 sc->wme[2].aifsn[ac] = wmep->wmep_aifsn;
1051                 sc->wme[2].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1052                 sc->wme[2].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1053                 sc->wme[2].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1054                 sc->wme[2].acm[ac]   = wmep->wmep_acm;
1055         }
1056 }
1057
1058 static int
1059 iwi_wme_setparams(struct iwi_softc *sc, struct ieee80211com *ic)
1060 {
1061         const struct wmeParams *wmep;
1062         int ac;
1063
1064         for (ac = 0; ac < WME_NUM_AC; ac++) {
1065                 /* set WME values for current operating mode */
1066                 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac];
1067                 sc->wme[0].aifsn[ac] = wmep->wmep_aifsn;
1068                 sc->wme[0].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1069                 sc->wme[0].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1070                 sc->wme[0].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1071                 sc->wme[0].acm[ac]   = wmep->wmep_acm;
1072         }
1073
1074         DPRINTF(("Setting WME parameters\n"));
1075         return iwi_cmd(sc, IWI_CMD_SET_WME_PARAMS, sc->wme, sizeof sc->wme);
1076 }
1077 #undef IWI_USEC
1078 #undef IWI_EXP2
1079
1080 static void
1081 iwi_update_wme_task(void *arg, int npending)
1082 {
1083         struct ieee80211com *ic = arg;
1084         struct iwi_softc *sc = ic->ic_ifp->if_softc;
1085
1086         wlan_serialize_enter();
1087         (void) iwi_wme_setparams(sc, ic);
1088         wlan_serialize_exit();
1089 }
1090
1091 static int
1092 iwi_wme_update(struct ieee80211com *ic)
1093 {
1094         struct iwi_softc *sc = ic->ic_ifp->if_softc;
1095         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1096
1097         /*
1098          * We may be called to update the WME parameters in
1099          * the adapter at various places.  If we're already
1100          * associated then initiate the request immediately;
1101          * otherwise we assume the params will get sent down
1102          * to the adapter as part of the work iwi_auth_and_assoc
1103          * does.
1104          */
1105         if (vap->iv_state == IEEE80211_S_RUN)
1106                 ieee80211_runtask(ic, &sc->sc_wmetask);
1107         return (0);
1108 }
1109
1110 static int
1111 iwi_wme_setie(struct iwi_softc *sc)
1112 {
1113         struct ieee80211_wme_info wme;
1114
1115         memset(&wme, 0, sizeof wme);
1116         wme.wme_id = IEEE80211_ELEMID_VENDOR;
1117         wme.wme_len = sizeof (struct ieee80211_wme_info) - 2;
1118         wme.wme_oui[0] = 0x00;
1119         wme.wme_oui[1] = 0x50;
1120         wme.wme_oui[2] = 0xf2;
1121         wme.wme_type = WME_OUI_TYPE;
1122         wme.wme_subtype = WME_INFO_OUI_SUBTYPE;
1123         wme.wme_version = WME_VERSION;
1124         wme.wme_info = 0;
1125
1126         DPRINTF(("Setting WME IE (len=%u)\n", wme.wme_len));
1127         return iwi_cmd(sc, IWI_CMD_SET_WMEIE, &wme, sizeof wme);
1128 }
1129
1130 /*
1131  * Read 16 bits at address 'addr' from the serial EEPROM.
1132  */
1133 static uint16_t
1134 iwi_read_prom_word(struct iwi_softc *sc, uint8_t addr)
1135 {
1136         uint32_t tmp;
1137         uint16_t val;
1138         int n;
1139
1140         /* clock C once before the first command */
1141         IWI_EEPROM_CTL(sc, 0);
1142         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1143         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1144         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1145
1146         /* write start bit (1) */
1147         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1148         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1149
1150         /* write READ opcode (10) */
1151         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1152         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1153         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1154         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1155
1156         /* write address A7-A0 */
1157         for (n = 7; n >= 0; n--) {
1158                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1159                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D));
1160                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1161                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D) | IWI_EEPROM_C);
1162         }
1163
1164         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1165
1166         /* read data Q15-Q0 */
1167         val = 0;
1168         for (n = 15; n >= 0; n--) {
1169                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1170                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1171                 tmp = MEM_READ_4(sc, IWI_MEM_EEPROM_CTL);
1172                 val |= ((tmp & IWI_EEPROM_Q) >> IWI_EEPROM_SHIFT_Q) << n;
1173         }
1174
1175         IWI_EEPROM_CTL(sc, 0);
1176
1177         /* clear Chip Select and clock C */
1178         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1179         IWI_EEPROM_CTL(sc, 0);
1180         IWI_EEPROM_CTL(sc, IWI_EEPROM_C);
1181
1182         return val;
1183 }
1184
1185 static void
1186 iwi_setcurchan(struct iwi_softc *sc, int chan)
1187 {
1188         struct ifnet *ifp = sc->sc_ifp;
1189         struct ieee80211com *ic = ifp->if_l2com;
1190
1191         sc->curchan = chan;
1192         ieee80211_radiotap_chan_change(ic);
1193 }
1194
1195 static void
1196 iwi_frame_intr(struct iwi_softc *sc, struct iwi_rx_data *data, int i,
1197     struct iwi_frame *frame)
1198 {
1199         struct ifnet *ifp = sc->sc_ifp;
1200         struct ieee80211com *ic = ifp->if_l2com;
1201         struct mbuf *mnew, *m;
1202         struct ieee80211_node *ni;
1203         int type, error, framelen;
1204         int8_t rssi, nf;
1205
1206         framelen = le16toh(frame->len);
1207         if (framelen < IEEE80211_MIN_LEN || framelen > MCLBYTES) {
1208                 /*
1209                  * XXX >MCLBYTES is bogus as it means the h/w dma'd
1210                  *     out of bounds; need to figure out how to limit
1211                  *     frame size in the firmware
1212                  */
1213                 /* XXX stat */
1214                 DPRINTFN(1,
1215                     ("drop rx frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1216                     le16toh(frame->len), frame->chan, frame->rssi,
1217                     frame->rssi_dbm));
1218                 return;
1219         }
1220
1221         DPRINTFN(5, ("received frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1222             le16toh(frame->len), frame->chan, frame->rssi, frame->rssi_dbm));
1223
1224         if (frame->chan != sc->curchan)
1225                 iwi_setcurchan(sc, frame->chan);
1226
1227         /*
1228          * Try to allocate a new mbuf for this ring element and load it before
1229          * processing the current mbuf. If the ring element cannot be loaded,
1230          * drop the received packet and reuse the old mbuf. In the unlikely
1231          * case that the old mbuf can't be reloaded either, explicitly panic.
1232          */
1233         mnew = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
1234         if (mnew == NULL) {
1235                 ifp->if_ierrors++;
1236                 return;
1237         }
1238
1239         bus_dmamap_unload(sc->rxq.data_dmat, data->map);
1240
1241         error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1242             mtod(mnew, void *), MCLBYTES, iwi_dma_map_addr, &data->physaddr,
1243             0);
1244         if (error != 0) {
1245                 m_freem(mnew);
1246
1247                 /* try to reload the old mbuf */
1248                 error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1249                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
1250                     &data->physaddr, 0);
1251                 if (error != 0) {
1252                         /* very unlikely that it will fail... */
1253                         panic("%s: could not load old rx mbuf",
1254                             device_get_name(sc->sc_dev));
1255                 }
1256                 ifp->if_ierrors++;
1257                 return;
1258         }
1259
1260         /*
1261          * New mbuf successfully loaded, update Rx ring and continue
1262          * processing.
1263          */
1264         m = data->m;
1265         data->m = mnew;
1266         CSR_WRITE_4(sc, data->reg, data->physaddr);
1267
1268         /* finalize mbuf */
1269         m->m_pkthdr.rcvif = ifp;
1270         m->m_pkthdr.len = m->m_len = sizeof (struct iwi_hdr) +
1271             sizeof (struct iwi_frame) + framelen;
1272
1273         m_adj(m, sizeof (struct iwi_hdr) + sizeof (struct iwi_frame));
1274
1275         rssi = frame->rssi_dbm;
1276         nf = -95;
1277         if (ieee80211_radiotap_active(ic)) {
1278                 struct iwi_rx_radiotap_header *tap = &sc->sc_rxtap;
1279
1280                 tap->wr_flags = 0;
1281                 tap->wr_antsignal = rssi;
1282                 tap->wr_antnoise = nf;
1283                 tap->wr_rate = iwi_cvtrate(frame->rate);
1284                 tap->wr_antenna = frame->antenna;
1285         }
1286
1287         ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *));
1288         if (ni != NULL) {
1289                 type = ieee80211_input(ni, m, rssi, nf);
1290                 ieee80211_free_node(ni);
1291         } else
1292                 type = ieee80211_input_all(ic, m, rssi, nf);
1293
1294         if (sc->sc_softled) {
1295                 /*
1296                  * Blink for any data frame.  Otherwise do a
1297                  * heartbeat-style blink when idle.  The latter
1298                  * is mainly for station mode where we depend on
1299                  * periodic beacon frames to trigger the poll event.
1300                  */
1301                 if (type == IEEE80211_FC0_TYPE_DATA) {
1302                         sc->sc_rxrate = frame->rate;
1303                         iwi_led_event(sc, IWI_LED_RX);
1304                 } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle)
1305                         iwi_led_event(sc, IWI_LED_POLL);
1306         }
1307 }
1308
1309 /*
1310  * Check for an association response frame to see if QoS
1311  * has been negotiated.  We parse just enough to figure
1312  * out if we're supposed to use QoS.  The proper solution
1313  * is to pass the frame up so ieee80211_input can do the
1314  * work but that's made hard by how things currently are
1315  * done in the driver.
1316  */
1317 static void
1318 iwi_checkforqos(struct ieee80211vap *vap,
1319         const struct ieee80211_frame *wh, int len)
1320 {
1321 #define SUBTYPE(wh)     ((wh)->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
1322         const uint8_t *frm, *efrm, *wme;
1323         struct ieee80211_node *ni;
1324         uint16_t capinfo, status, associd;
1325
1326         /* NB: +8 for capinfo, status, associd, and first ie */
1327         if (!(sizeof(*wh)+8 < len && len < IEEE80211_MAX_LEN) ||
1328             SUBTYPE(wh) != IEEE80211_FC0_SUBTYPE_ASSOC_RESP)
1329                 return;
1330         /*
1331          * asresp frame format
1332          *      [2] capability information
1333          *      [2] status
1334          *      [2] association ID
1335          *      [tlv] supported rates
1336          *      [tlv] extended supported rates
1337          *      [tlv] WME
1338          */
1339         frm = (const uint8_t *)&wh[1];
1340         efrm = ((const uint8_t *) wh) + len;
1341
1342         capinfo = le16toh(*(const uint16_t *)frm);
1343         frm += 2;
1344         status = le16toh(*(const uint16_t *)frm);
1345         frm += 2;
1346         associd = le16toh(*(const uint16_t *)frm);
1347         frm += 2;
1348
1349         wme = NULL;
1350         while (frm < efrm) {
1351                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1], return);
1352                 switch (*frm) {
1353                 case IEEE80211_ELEMID_VENDOR:
1354                         if (iswmeoui(frm))
1355                                 wme = frm;
1356                         break;
1357                 }
1358                 frm += frm[1] + 2;
1359         }
1360
1361         ni = vap->iv_bss;
1362         ni->ni_capinfo = capinfo;
1363         ni->ni_associd = associd;
1364         if (wme != NULL)
1365                 ni->ni_flags |= IEEE80211_NODE_QOS;
1366         else
1367                 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1368 #undef SUBTYPE
1369 }
1370
1371 /*
1372  * Task queue callbacks for iwi_notification_intr used to avoid LOR's.
1373  */
1374
1375 static void
1376 iwi_notification_intr(struct iwi_softc *sc, struct iwi_notif *notif)
1377 {
1378         struct ifnet *ifp = sc->sc_ifp;
1379         struct ieee80211com *ic = ifp->if_l2com;
1380         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1381         struct iwi_notif_scan_channel *chan;
1382         struct iwi_notif_scan_complete *scan;
1383         struct iwi_notif_authentication *auth;
1384         struct iwi_notif_association *assoc;
1385         struct iwi_notif_beacon_state *beacon;
1386
1387         switch (notif->type) {
1388         case IWI_NOTIF_TYPE_SCAN_CHANNEL:
1389                 chan = (struct iwi_notif_scan_channel *)(notif + 1);
1390
1391                 DPRINTFN(3, ("Scan of channel %u complete (%u)\n",
1392                     ieee80211_ieee2mhz(chan->nchan, 0), chan->nchan));
1393
1394                 /* Reset the timer, the scan is still going */
1395                 sc->sc_state_timer = 3;
1396                 break;
1397
1398         case IWI_NOTIF_TYPE_SCAN_COMPLETE:
1399                 scan = (struct iwi_notif_scan_complete *)(notif + 1);
1400
1401                 DPRINTFN(2, ("Scan completed (%u, %u)\n", scan->nchan,
1402                     scan->status));
1403
1404                 IWI_STATE_END(sc, IWI_FW_SCANNING);
1405
1406                 if (scan->status == IWI_SCAN_COMPLETED) {
1407                         /* NB: don't need to defer, net80211 does it for us */
1408                         ieee80211_scan_next(vap);
1409                 }
1410                 break;
1411
1412         case IWI_NOTIF_TYPE_AUTHENTICATION:
1413                 auth = (struct iwi_notif_authentication *)(notif + 1);
1414                 switch (auth->state) {
1415                 case IWI_AUTH_SUCCESS:
1416                         DPRINTFN(2, ("Authentication succeeeded\n"));
1417                         ieee80211_new_state(vap, IEEE80211_S_ASSOC, -1);
1418                         break;
1419                 case IWI_AUTH_FAIL:
1420                         /*
1421                          * These are delivered as an unsolicited deauth
1422                          * (e.g. due to inactivity) or in response to an
1423                          * associate request.
1424                          */
1425                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1426                         if (vap->iv_state != IEEE80211_S_RUN) {
1427                                 DPRINTFN(2, ("Authentication failed\n"));
1428                                 vap->iv_stats.is_rx_auth_fail++;
1429                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1430                         } else {
1431                                 DPRINTFN(2, ("Deauthenticated\n"));
1432                                 vap->iv_stats.is_rx_deauth++;
1433                         }
1434                         ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1435                         break;
1436                 case IWI_AUTH_SENT_1:
1437                 case IWI_AUTH_RECV_2:
1438                 case IWI_AUTH_SEQ1_PASS:
1439                         break;
1440                 case IWI_AUTH_SEQ1_FAIL:
1441                         DPRINTFN(2, ("Initial authentication handshake failed; "
1442                                 "you probably need shared key\n"));
1443                         vap->iv_stats.is_rx_auth_fail++;
1444                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1445                         /* XXX retry shared key when in auto */
1446                         break;
1447                 default:
1448                         device_printf(sc->sc_dev,
1449                             "unknown authentication state %u\n", auth->state);
1450                         break;
1451                 }
1452                 break;
1453
1454         case IWI_NOTIF_TYPE_ASSOCIATION:
1455                 assoc = (struct iwi_notif_association *)(notif + 1);
1456                 switch (assoc->state) {
1457                 case IWI_AUTH_SUCCESS:
1458                         /* re-association, do nothing */
1459                         break;
1460                 case IWI_ASSOC_SUCCESS:
1461                         DPRINTFN(2, ("Association succeeded\n"));
1462                         sc->flags |= IWI_FLAG_ASSOCIATED;
1463                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1464                         iwi_checkforqos(vap,
1465                             (const struct ieee80211_frame *)(assoc+1),
1466                             le16toh(notif->len) - sizeof(*assoc));
1467                         ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
1468                         break;
1469                 case IWI_ASSOC_INIT:
1470                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1471                         switch (sc->fw_state) {
1472                         case IWI_FW_ASSOCIATING:
1473                                 DPRINTFN(2, ("Association failed\n"));
1474                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1475                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1476                                 break;
1477
1478                         case IWI_FW_DISASSOCIATING:
1479                                 DPRINTFN(2, ("Dissassociated\n"));
1480                                 IWI_STATE_END(sc, IWI_FW_DISASSOCIATING);
1481                                 vap->iv_stats.is_rx_disassoc++;
1482                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1483                                 break;
1484                         }
1485                         break;
1486                 default:
1487                         device_printf(sc->sc_dev,
1488                             "unknown association state %u\n", assoc->state);
1489                         break;
1490                 }
1491                 break;
1492
1493         case IWI_NOTIF_TYPE_BEACON:
1494                 /* XXX check struct length */
1495                 beacon = (struct iwi_notif_beacon_state *)(notif + 1);
1496
1497                 DPRINTFN(5, ("Beacon state (%u, %u)\n",
1498                     beacon->state, le32toh(beacon->number)));
1499
1500                 if (beacon->state == IWI_BEACON_MISS) {
1501                         /*
1502                          * The firmware notifies us of every beacon miss
1503                          * so we need to track the count against the
1504                          * configured threshold before notifying the
1505                          * 802.11 layer.
1506                          * XXX try to roam, drop assoc only on much higher count
1507                          */
1508                         if (le32toh(beacon->number) >= vap->iv_bmissthreshold) {
1509                                 DPRINTF(("Beacon miss: %u >= %u\n",
1510                                     le32toh(beacon->number),
1511                                     vap->iv_bmissthreshold));
1512                                 vap->iv_stats.is_beacon_miss++;
1513                                 /*
1514                                  * It's pointless to notify the 802.11 layer
1515                                  * as it'll try to send a probe request (which
1516                                  * we'll discard) and then timeout and drop us
1517                                  * into scan state.  Instead tell the firmware
1518                                  * to disassociate and then on completion we'll
1519                                  * kick the state machine to scan.
1520                                  */
1521                                 ieee80211_runtask(ic, &sc->sc_disassoctask);
1522                         }
1523                 }
1524                 break;
1525
1526         case IWI_NOTIF_TYPE_CALIBRATION:
1527         case IWI_NOTIF_TYPE_NOISE:
1528         case IWI_NOTIF_TYPE_LINK_QUALITY:
1529                 DPRINTFN(5, ("Notification (%u)\n", notif->type));
1530                 break;
1531
1532         default:
1533                 DPRINTF(("unknown notification type %u flags 0x%x len %u\n",
1534                     notif->type, notif->flags, le16toh(notif->len)));
1535                 break;
1536         }
1537 }
1538
1539 static void
1540 iwi_rx_intr(struct iwi_softc *sc)
1541 {
1542         struct iwi_rx_data *data;
1543         struct iwi_hdr *hdr;
1544         uint32_t hw;
1545
1546         hw = CSR_READ_4(sc, IWI_CSR_RX_RIDX);
1547
1548         for (; sc->rxq.cur != hw;) {
1549                 data = &sc->rxq.data[sc->rxq.cur];
1550
1551                 bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1552                     BUS_DMASYNC_POSTREAD);
1553
1554                 hdr = mtod(data->m, struct iwi_hdr *);
1555
1556                 switch (hdr->type) {
1557                 case IWI_HDR_TYPE_FRAME:
1558                         iwi_frame_intr(sc, data, sc->rxq.cur,
1559                             (struct iwi_frame *)(hdr + 1));
1560                         break;
1561
1562                 case IWI_HDR_TYPE_NOTIF:
1563                         iwi_notification_intr(sc,
1564                             (struct iwi_notif *)(hdr + 1));
1565                         break;
1566
1567                 default:
1568                         device_printf(sc->sc_dev, "unknown hdr type %u\n",
1569                             hdr->type);
1570                 }
1571
1572                 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur));
1573
1574                 sc->rxq.cur = (sc->rxq.cur + 1) % IWI_RX_RING_COUNT;
1575         }
1576
1577         /* tell the firmware what we have processed */
1578         hw = (hw == 0) ? IWI_RX_RING_COUNT - 1 : hw - 1;
1579         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, hw);
1580 }
1581
1582 static void
1583 iwi_tx_intr(struct iwi_softc *sc, struct iwi_tx_ring *txq)
1584 {
1585         struct ifnet *ifp = sc->sc_ifp;
1586         struct iwi_tx_data *data;
1587         uint32_t hw;
1588
1589         hw = CSR_READ_4(sc, txq->csr_ridx);
1590
1591         for (; txq->next != hw;) {
1592                 data = &txq->data[txq->next];
1593
1594                 bus_dmamap_sync(txq->data_dmat, data->map,
1595                     BUS_DMASYNC_POSTWRITE);
1596                 bus_dmamap_unload(txq->data_dmat, data->map);
1597                 if (data->m->m_flags & M_TXCB)
1598                         ieee80211_process_callback(data->ni, data->m, 0/*XXX*/);
1599                 m_freem(data->m);
1600                 data->m = NULL;
1601                 ieee80211_free_node(data->ni);
1602                 data->ni = NULL;
1603
1604                 DPRINTFN(15, ("tx done idx=%u\n", txq->next));
1605
1606                 ifp->if_opackets++;
1607
1608                 txq->queued--;
1609                 txq->next = (txq->next + 1) % IWI_TX_RING_COUNT;
1610         }
1611
1612         sc->sc_tx_timer = 0;
1613         ifq_clr_oactive(&ifp->if_snd);
1614
1615         if (sc->sc_softled)
1616                 iwi_led_event(sc, IWI_LED_TX);
1617
1618         iwi_start_locked(ifp);
1619 }
1620
1621 static void
1622 iwi_fatal_error_intr(struct iwi_softc *sc)
1623 {
1624         struct ifnet *ifp = sc->sc_ifp;
1625         struct ieee80211com *ic = ifp->if_l2com;
1626         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1627
1628         device_printf(sc->sc_dev, "firmware error\n");
1629         if (vap != NULL)
1630                 ieee80211_cancel_scan(vap);
1631         ieee80211_runtask(ic, &sc->sc_restarttask);
1632
1633         sc->flags &= ~IWI_FLAG_BUSY;
1634         sc->sc_busy_timer = 0;
1635         wakeup(sc);
1636 }
1637
1638 static void
1639 iwi_radio_off_intr(struct iwi_softc *sc)
1640 {
1641         struct ifnet *ifp = sc->sc_ifp;
1642         struct ieee80211com *ic = ifp->if_l2com;
1643
1644         ieee80211_runtask(ic, &sc->sc_radiofftask);
1645 }
1646
1647 static void
1648 iwi_intr(void *arg)
1649 {
1650         struct iwi_softc *sc = arg;
1651         uint32_t r;
1652
1653         if ((r = CSR_READ_4(sc, IWI_CSR_INTR)) == 0 || r == 0xffffffff) {
1654                 return;
1655         }
1656
1657         /* acknowledge interrupts */
1658         CSR_WRITE_4(sc, IWI_CSR_INTR, r);
1659
1660         if (r & IWI_INTR_FATAL_ERROR) {
1661                 iwi_fatal_error_intr(sc);
1662                 return;
1663         }
1664
1665         if (r & IWI_INTR_FW_INITED) {
1666                 if (!(r & (IWI_INTR_FATAL_ERROR | IWI_INTR_PARITY_ERROR)))
1667                         wakeup(sc);
1668         }
1669
1670         if (r & IWI_INTR_RADIO_OFF)
1671                 iwi_radio_off_intr(sc);
1672
1673         if (r & IWI_INTR_CMD_DONE) {
1674                 sc->flags &= ~IWI_FLAG_BUSY;
1675                 sc->sc_busy_timer = 0;
1676                 wakeup(sc);
1677         }
1678
1679         if (r & IWI_INTR_TX1_DONE)
1680                 iwi_tx_intr(sc, &sc->txq[0]);
1681
1682         if (r & IWI_INTR_TX2_DONE)
1683                 iwi_tx_intr(sc, &sc->txq[1]);
1684
1685         if (r & IWI_INTR_TX3_DONE)
1686                 iwi_tx_intr(sc, &sc->txq[2]);
1687
1688         if (r & IWI_INTR_TX4_DONE)
1689                 iwi_tx_intr(sc, &sc->txq[3]);
1690
1691         if (r & IWI_INTR_RX_DONE)
1692                 iwi_rx_intr(sc);
1693
1694         if (r & IWI_INTR_PARITY_ERROR) {
1695                 /* XXX rate-limit */
1696                 device_printf(sc->sc_dev, "parity error\n");
1697         }
1698 }
1699
1700 static int
1701 iwi_cmd(struct iwi_softc *sc, uint8_t type, void *data, uint8_t len)
1702 {
1703         struct iwi_cmd_desc *desc;
1704
1705         if (sc->flags & IWI_FLAG_BUSY) {
1706                 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n",
1707                         __func__, type);
1708                 return EAGAIN;
1709         }
1710
1711         sc->flags |= IWI_FLAG_BUSY;
1712         sc->sc_busy_timer = 2;
1713
1714         desc = &sc->cmdq.desc[sc->cmdq.cur];
1715
1716         desc->hdr.type = IWI_HDR_TYPE_COMMAND;
1717         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1718         desc->type = type;
1719         desc->len = len;
1720         memcpy(desc->data, data, len);
1721
1722         bus_dmamap_sync(sc->cmdq.desc_dmat, sc->cmdq.desc_map,
1723             BUS_DMASYNC_PREWRITE);
1724
1725         DPRINTFN(2, ("sending command idx=%u type=%u len=%u\n", sc->cmdq.cur,
1726             type, len));
1727
1728         sc->cmdq.cur = (sc->cmdq.cur + 1) % IWI_CMD_RING_COUNT;
1729         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
1730
1731         return zsleep(sc, &wlan_global_serializer, 0, "iwicmd", hz);
1732 }
1733
1734 static void
1735 iwi_write_ibssnode(struct iwi_softc *sc,
1736         const u_int8_t addr[IEEE80211_ADDR_LEN], int entry)
1737 {
1738         struct iwi_ibssnode node;
1739
1740         /* write node information into NIC memory */
1741         memset(&node, 0, sizeof node);
1742         IEEE80211_ADDR_COPY(node.bssid, addr);
1743
1744         DPRINTF(("%s mac %6D station %u\n", __func__, node.bssid, ":", entry));
1745
1746         CSR_WRITE_REGION_1(sc,
1747             IWI_CSR_NODE_BASE + entry * sizeof node,
1748             (uint8_t *)&node, sizeof node);
1749 }
1750
1751 static int
1752 iwi_tx_start(struct ifnet *ifp, struct mbuf *m0, struct ieee80211_node *ni,
1753     int ac)
1754 {
1755         struct iwi_softc *sc = ifp->if_softc;
1756         struct ieee80211vap *vap = ni->ni_vap;
1757         struct ieee80211com *ic = ni->ni_ic;
1758         struct iwi_node *in = (struct iwi_node *)ni;
1759         const struct ieee80211_frame *wh;
1760         struct ieee80211_key *k;
1761         const struct chanAccParams *cap;
1762         struct iwi_tx_ring *txq = &sc->txq[ac];
1763         struct iwi_tx_data *data;
1764         struct iwi_tx_desc *desc;
1765         struct mbuf *mnew;
1766         bus_dma_segment_t segs[IWI_MAX_NSEG];
1767         int error, nsegs, hdrlen, i;
1768         int ismcast, flags, xflags, staid;
1769
1770         wh = mtod(m0, const struct ieee80211_frame *);
1771         /* NB: only data frames use this path */
1772         hdrlen = ieee80211_hdrsize(wh);
1773         ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1774         flags = xflags = 0;
1775
1776         if (!ismcast)
1777                 flags |= IWI_DATA_FLAG_NEED_ACK;
1778         if (vap->iv_flags & IEEE80211_F_SHPREAMBLE)
1779                 flags |= IWI_DATA_FLAG_SHPREAMBLE;
1780         if (IEEE80211_QOS_HAS_SEQ(wh)) {
1781                 xflags |= IWI_DATA_XFLAG_QOS;
1782                 cap = &ic->ic_wme.wme_chanParams;
1783                 if (!cap->cap_wmeParams[ac].wmep_noackPolicy)
1784                         flags &= ~IWI_DATA_FLAG_NEED_ACK;
1785         }
1786
1787         /*
1788          * This is only used in IBSS mode where the firmware expect an index
1789          * in a h/w table instead of a destination address.
1790          */
1791         if (vap->iv_opmode == IEEE80211_M_IBSS) {
1792                 if (!ismcast) {
1793                         if (in->in_station == -1) {
1794                                 in->in_station = devfs_clone_bitmap_get(&sc->sc_unr,
1795                                         IWI_MAX_IBSSNODE-1);
1796                                 if (in->in_station == -1) {
1797                                         /* h/w table is full */
1798                                         m_freem(m0);
1799                                         ieee80211_free_node(ni);
1800                                         ifp->if_oerrors++;
1801                                         return 0;
1802                                 }
1803                                 iwi_write_ibssnode(sc,
1804                                         ni->ni_macaddr, in->in_station);
1805                         }
1806                         staid = in->in_station;
1807                 } else {
1808                         /*
1809                          * Multicast addresses have no associated node
1810                          * so there will be no station entry.  We reserve
1811                          * entry 0 for one mcast address and use that.
1812                          * If there are many being used this will be
1813                          * expensive and we'll need to do a better job
1814                          * but for now this handles the broadcast case.
1815                          */
1816                         if (!IEEE80211_ADDR_EQ(wh->i_addr1, sc->sc_mcast)) {
1817                                 IEEE80211_ADDR_COPY(sc->sc_mcast, wh->i_addr1);
1818                                 iwi_write_ibssnode(sc, sc->sc_mcast, 0);
1819                         }
1820                         staid = 0;
1821                 }
1822         } else
1823                 staid = 0;
1824
1825         if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1826                 k = ieee80211_crypto_encap(ni, m0);
1827                 if (k == NULL) {
1828                         m_freem(m0);
1829                         return ENOBUFS;
1830                 }
1831
1832                 /* packet header may have moved, reset our local pointer */
1833                 wh = mtod(m0, struct ieee80211_frame *);
1834         }
1835
1836         if (ieee80211_radiotap_active_vap(vap)) {
1837                 struct iwi_tx_radiotap_header *tap = &sc->sc_txtap;
1838
1839                 tap->wt_flags = 0;
1840
1841                 ieee80211_radiotap_tx(vap, m0);
1842         }
1843
1844         data = &txq->data[txq->cur];
1845         desc = &txq->desc[txq->cur];
1846
1847         /* save and trim IEEE802.11 header */
1848         m_copydata(m0, 0, hdrlen, (caddr_t)&desc->wh);
1849         m_adj(m0, hdrlen);
1850
1851         error = bus_dmamap_load_mbuf_segment(txq->data_dmat, data->map,
1852             m0, segs, 1, &nsegs, BUS_DMA_NOWAIT);
1853         if (error != 0 && error != EFBIG) {
1854                 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1855                     error);
1856                 m_freem(m0);
1857                 return error;
1858         }
1859         if (error != 0) {
1860                 mnew = m_defrag(m0, MB_DONTWAIT);
1861                 if (mnew == NULL) {
1862                         device_printf(sc->sc_dev,
1863                             "could not defragment mbuf\n");
1864                         m_freem(m0);
1865                         return ENOBUFS;
1866                 }
1867                 m0 = mnew;
1868
1869                 error = bus_dmamap_load_mbuf_segment(txq->data_dmat,
1870                     data->map, m0, segs, 1, &nsegs, BUS_DMA_NOWAIT);
1871                 if (error != 0) {
1872                         device_printf(sc->sc_dev,
1873                             "could not map mbuf (error %d)\n", error);
1874                         m_freem(m0);
1875                         return error;
1876                 }
1877         }
1878
1879         data->m = m0;
1880         data->ni = ni;
1881
1882         desc->hdr.type = IWI_HDR_TYPE_DATA;
1883         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1884         desc->station = staid;
1885         desc->cmd = IWI_DATA_CMD_TX;
1886         desc->len = htole16(m0->m_pkthdr.len);
1887         desc->flags = flags;
1888         desc->xflags = xflags;
1889
1890 #if 0
1891         if (vap->iv_flags & IEEE80211_F_PRIVACY)
1892                 desc->wep_txkey = vap->iv_def_txkey;
1893         else
1894 #endif
1895                 desc->flags |= IWI_DATA_FLAG_NO_WEP;
1896
1897         desc->nseg = htole32(nsegs);
1898         for (i = 0; i < nsegs; i++) {
1899                 desc->seg_addr[i] = htole32(segs[i].ds_addr);
1900                 desc->seg_len[i]  = htole16(segs[i].ds_len);
1901         }
1902
1903         bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1904         bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE);
1905
1906         DPRINTFN(5, ("sending data frame txq=%u idx=%u len=%u nseg=%u\n",
1907             ac, txq->cur, le16toh(desc->len), nsegs));
1908
1909         txq->queued++;
1910         txq->cur = (txq->cur + 1) % IWI_TX_RING_COUNT;
1911         CSR_WRITE_4(sc, txq->csr_widx, txq->cur);
1912
1913         return 0;
1914 }
1915
1916 static int
1917 iwi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
1918         const struct ieee80211_bpf_params *params)
1919 {
1920         /* no support; just discard */
1921         m_freem(m);
1922         ieee80211_free_node(ni);
1923         return 0;
1924 }
1925
1926 static void
1927 iwi_start_locked(struct ifnet *ifp)
1928 {
1929         struct iwi_softc *sc = ifp->if_softc;
1930         struct mbuf *m;
1931         struct ieee80211_node *ni;
1932         int ac;
1933
1934         if ((ifp->if_flags & IFF_RUNNING) == 0)
1935                 return;
1936
1937         for (;;) {
1938                 IF_DEQUEUE(&ifp->if_snd, m);
1939                 if (m == NULL)
1940                         break;
1941                 ac = M_WME_GETAC(m);
1942                 if (sc->txq[ac].queued > IWI_TX_RING_COUNT - 8) {
1943                         /* there is no place left in this ring; tail drop */
1944                         /* XXX tail drop */
1945                         IF_PREPEND(&ifp->if_snd, m);
1946                         ifq_set_oactive(&ifp->if_snd);
1947                         break;
1948                 }
1949
1950                 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
1951                 if (iwi_tx_start(ifp, m, ni, ac) != 0) {
1952                         ieee80211_free_node(ni);
1953                         ifp->if_oerrors++;
1954                         break;
1955                 }
1956
1957                 sc->sc_tx_timer = 5;
1958         }
1959 }
1960
1961 static void
1962 iwi_start(struct ifnet *ifp)
1963 {
1964         iwi_start_locked(ifp);
1965 }
1966
1967 static void
1968 iwi_watchdog(void *arg)
1969 {
1970         struct iwi_softc *sc = arg;
1971         struct ifnet *ifp = sc->sc_ifp;
1972         struct ieee80211com *ic = ifp->if_l2com;
1973
1974         wlan_serialize_enter();
1975         if (sc->sc_tx_timer > 0) {
1976                 if (--sc->sc_tx_timer == 0) {
1977                         if_printf(ifp, "device timeout\n");
1978                         ifp->if_oerrors++;
1979                         wlan_serialize_exit();
1980                         ieee80211_runtask(ic, &sc->sc_restarttask);
1981                         wlan_serialize_enter();
1982                 }
1983         }
1984         if (sc->sc_state_timer > 0) {
1985                 if (--sc->sc_state_timer == 0) {
1986                         if_printf(ifp, "firmware stuck in state %d, resetting\n",
1987                             sc->fw_state);
1988                         if (sc->fw_state == IWI_FW_SCANNING) {
1989                                 struct ieee80211com *ic = ifp->if_l2com;
1990                                 ieee80211_cancel_scan(TAILQ_FIRST(&ic->ic_vaps));
1991                         }
1992                         wlan_serialize_exit();
1993                         ieee80211_runtask(ic, &sc->sc_restarttask);
1994                         wlan_serialize_enter();
1995                         sc->sc_state_timer = 3;
1996                 }
1997         }
1998         if (sc->sc_busy_timer > 0) {
1999                 if (--sc->sc_busy_timer == 0) {
2000                         if_printf(ifp, "firmware command timeout, resetting\n");
2001                         wlan_serialize_exit();
2002                         ieee80211_runtask(ic, &sc->sc_restarttask);
2003                         wlan_serialize_enter();
2004                 }
2005         }
2006         callout_reset(&sc->sc_wdtimer_callout, hz, iwi_watchdog, sc);
2007         wlan_serialize_exit();
2008 }
2009
2010 static int
2011 iwi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *ucred)
2012 {
2013         struct iwi_softc *sc = ifp->if_softc;
2014         struct ieee80211com *ic = ifp->if_l2com;
2015         struct ifreq *ifr = (struct ifreq *) data;
2016         int error = 0, startall = 0;
2017
2018         switch (cmd) {
2019         case SIOCSIFFLAGS:
2020                 if (ifp->if_flags & IFF_UP) {
2021                         if (!(ifp->if_flags & IFF_RUNNING)) {
2022                                 iwi_init_locked(sc);
2023                                 startall = 1;
2024                         }
2025                 } else {
2026                         if (ifp->if_flags & IFF_RUNNING)
2027                                 iwi_stop_locked(sc);
2028                 }
2029                 if (startall)
2030                         ieee80211_start_all(ic);
2031                 break;
2032         case SIOCGIFMEDIA:
2033                 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
2034                 break;
2035         case SIOCGIFADDR:
2036                 error = ether_ioctl(ifp, cmd, data);
2037                 break;
2038         default:
2039                 error = EINVAL;
2040                 break;
2041         }
2042         return error;
2043 }
2044
2045 static void
2046 iwi_stop_master(struct iwi_softc *sc)
2047 {
2048         uint32_t tmp;
2049         int ntries;
2050
2051         /* disable interrupts */
2052         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, 0);
2053
2054         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_STOP_MASTER);
2055         for (ntries = 0; ntries < 5; ntries++) {
2056                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2057                         break;
2058                 DELAY(10);
2059         }
2060         if (ntries == 5)
2061                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2062
2063         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2064         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_PRINCETON_RESET);
2065
2066         sc->flags &= ~IWI_FLAG_FW_INITED;
2067 }
2068
2069 static int
2070 iwi_reset(struct iwi_softc *sc)
2071 {
2072         uint32_t tmp;
2073         int i, ntries;
2074
2075         iwi_stop_master(sc);
2076
2077         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2078         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2079
2080         CSR_WRITE_4(sc, IWI_CSR_READ_INT, IWI_READ_INT_INIT_HOST);
2081
2082         /* wait for clock stabilization */
2083         for (ntries = 0; ntries < 1000; ntries++) {
2084                 if (CSR_READ_4(sc, IWI_CSR_CTL) & IWI_CTL_CLOCK_READY)
2085                         break;
2086                 DELAY(200);
2087         }
2088         if (ntries == 1000) {
2089                 device_printf(sc->sc_dev,
2090                     "timeout waiting for clock stabilization\n");
2091                 return EIO;
2092         }
2093
2094         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2095         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_SOFT_RESET);
2096
2097         DELAY(10);
2098
2099         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2100         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2101
2102         /* clear NIC memory */
2103         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0);
2104         for (i = 0; i < 0xc000; i++)
2105                 CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2106
2107         return 0;
2108 }
2109
2110 static const struct iwi_firmware_ohdr *
2111 iwi_setup_ofw(struct iwi_softc *sc, struct iwi_fw *fw)
2112 {
2113         const struct firmware *fp = fw->fp;
2114         const struct iwi_firmware_ohdr *hdr;
2115
2116         if (fp->datasize < sizeof (struct iwi_firmware_ohdr)) {
2117                 device_printf(sc->sc_dev, "image '%s' too small\n", fp->name);
2118                 return NULL;
2119         }
2120         hdr = (const struct iwi_firmware_ohdr *)fp->data;
2121         if ((IWI_FW_GET_MAJOR(le32toh(hdr->version)) != IWI_FW_REQ_MAJOR) ||
2122             (IWI_FW_GET_MINOR(le32toh(hdr->version)) != IWI_FW_REQ_MINOR)) {
2123                 device_printf(sc->sc_dev, "version for '%s' %d.%d != %d.%d\n",
2124                     fp->name, IWI_FW_GET_MAJOR(le32toh(hdr->version)),
2125                     IWI_FW_GET_MINOR(le32toh(hdr->version)), IWI_FW_REQ_MAJOR,
2126                     IWI_FW_REQ_MINOR);
2127                 return NULL;
2128         }
2129         fw->data = ((const char *) fp->data) + sizeof(struct iwi_firmware_ohdr);
2130         fw->size = fp->datasize - sizeof(struct iwi_firmware_ohdr);
2131         fw->name = fp->name;
2132         return hdr;
2133 }
2134
2135 static const struct iwi_firmware_ohdr *
2136 iwi_setup_oucode(struct iwi_softc *sc, struct iwi_fw *fw)
2137 {
2138         const struct iwi_firmware_ohdr *hdr;
2139
2140         hdr = iwi_setup_ofw(sc, fw);
2141         if (hdr != NULL && le32toh(hdr->mode) != IWI_FW_MODE_UCODE) {
2142                 device_printf(sc->sc_dev, "%s is not a ucode image\n",
2143                     fw->name);
2144                 hdr = NULL;
2145         }
2146         return hdr;
2147 }
2148
2149 static void
2150 iwi_getfw(struct iwi_fw *fw, const char *fwname,
2151           struct iwi_fw *uc, const char *ucname)
2152 {
2153         wlan_assert_serialized();
2154         wlan_serialize_exit();
2155         if (fw->fp == NULL)
2156                 fw->fp = firmware_get(fwname);
2157
2158         /* NB: pre-3.0 ucode is packaged separately */
2159         if (uc->fp == NULL && fw->fp != NULL && fw->fp->version < 300)
2160                 uc->fp = firmware_get(ucname);
2161         wlan_serialize_enter();
2162 }
2163
2164 /*
2165  * Get the required firmware images if not already loaded.
2166  * Note that we hold firmware images so long as the device
2167  * is marked up in case we need to reload them on device init.
2168  * This is necessary because we re-init the device sometimes
2169  * from a context where we cannot read from the filesystem
2170  * (e.g. from the taskqueue thread when rfkill is re-enabled).
2171  * XXX return 0 on success, 1 on error.
2172  *
2173  * NB: the order of get'ing and put'ing images here is
2174  * intentional to support handling firmware images bundled
2175  * by operating mode and/or all together in one file with
2176  * the boot firmware as "master".
2177  */
2178 static int
2179 iwi_get_firmware(struct iwi_softc *sc, enum ieee80211_opmode opmode)
2180 {
2181         const struct iwi_firmware_hdr *hdr;
2182         const struct firmware *fp;
2183
2184         wlan_serialize_enter();
2185
2186         /* invalidate cached firmware on mode change */
2187         if (sc->fw_mode != opmode)
2188                 iwi_put_firmware(sc);
2189
2190         switch (opmode) {
2191         case IEEE80211_M_STA:
2192                 iwi_getfw(&sc->fw_fw, "iwi_bss", &sc->fw_uc, "iwi_ucode_bss");
2193                 break;
2194         case IEEE80211_M_IBSS:
2195                 iwi_getfw(&sc->fw_fw, "iwi_ibss", &sc->fw_uc, "iwi_ucode_ibss");
2196                 break;
2197         case IEEE80211_M_MONITOR:
2198                 iwi_getfw(&sc->fw_fw, "iwi_monitor",
2199                           &sc->fw_uc, "iwi_ucode_monitor");
2200                 break;
2201         default:
2202                 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode);
2203                 wlan_serialize_exit();
2204                 return EINVAL;
2205         }
2206         fp = sc->fw_fw.fp;
2207         if (fp == NULL) {
2208                 device_printf(sc->sc_dev, "could not load firmware\n");
2209                 goto bad;
2210         }
2211         if (fp->version < 300) {
2212                 /*
2213                  * Firmware prior to 3.0 was packaged as separate
2214                  * boot, firmware, and ucode images.  Verify the
2215                  * ucode image was read in, retrieve the boot image
2216                  * if needed, and check version stamps for consistency.
2217                  * The version stamps in the data are also checked
2218                  * above; this is a bit paranoid but is a cheap
2219                  * safeguard against mis-packaging.
2220                  */
2221                 if (sc->fw_uc.fp == NULL) {
2222                         device_printf(sc->sc_dev, "could not load ucode\n");
2223                         goto bad;
2224                 }
2225                 if (sc->fw_boot.fp == NULL) {
2226                         sc->fw_boot.fp = firmware_get("iwi_boot");
2227                         if (sc->fw_boot.fp == NULL) {
2228                                 device_printf(sc->sc_dev,
2229                                         "could not load boot firmware\n");
2230                                 goto bad;
2231                         }
2232                 }
2233                 if (sc->fw_boot.fp->version != sc->fw_fw.fp->version ||
2234                     sc->fw_boot.fp->version != sc->fw_uc.fp->version) {
2235                         device_printf(sc->sc_dev,
2236                             "firmware version mismatch: "
2237                             "'%s' is %d, '%s' is %d, '%s' is %d\n",
2238                             sc->fw_boot.fp->name, sc->fw_boot.fp->version,
2239                             sc->fw_uc.fp->name, sc->fw_uc.fp->version,
2240                             sc->fw_fw.fp->name, sc->fw_fw.fp->version
2241                         );
2242                         goto bad;
2243                 }
2244                 /*
2245                  * Check and setup each image.
2246                  */
2247                 if (iwi_setup_oucode(sc, &sc->fw_uc) == NULL ||
2248                     iwi_setup_ofw(sc, &sc->fw_boot) == NULL ||
2249                     iwi_setup_ofw(sc, &sc->fw_fw) == NULL)
2250                         goto bad;
2251         } else {
2252                 /*
2253                  * Check and setup combined image.
2254                  */
2255                 if (fp->datasize < sizeof(struct iwi_firmware_hdr)) {
2256                         device_printf(sc->sc_dev, "image '%s' too small\n",
2257                             fp->name);
2258                         goto bad;
2259                 }
2260                 hdr = (const struct iwi_firmware_hdr *)fp->data;
2261                 if (fp->datasize < sizeof(*hdr) + le32toh(hdr->bsize) + le32toh(hdr->usize)
2262                                 + le32toh(hdr->fsize)) {
2263                         device_printf(sc->sc_dev, "image '%s' too small (2)\n",
2264                             fp->name);
2265                         goto bad;
2266                 }
2267                 sc->fw_boot.data = ((const char *) fp->data) + sizeof(*hdr);
2268                 sc->fw_boot.size = le32toh(hdr->bsize);
2269                 sc->fw_boot.name = fp->name;
2270                 sc->fw_uc.data = sc->fw_boot.data + sc->fw_boot.size;
2271                 sc->fw_uc.size = le32toh(hdr->usize);
2272                 sc->fw_uc.name = fp->name;
2273                 sc->fw_fw.data = sc->fw_uc.data + sc->fw_uc.size;
2274                 sc->fw_fw.size = le32toh(hdr->fsize);
2275                 sc->fw_fw.name = fp->name;
2276         }
2277 #if 0
2278         device_printf(sc->sc_dev, "boot %d ucode %d fw %d bytes\n",
2279                 sc->fw_boot.size, sc->fw_uc.size, sc->fw_fw.size);
2280 #endif
2281
2282         sc->fw_mode = opmode;
2283         wlan_serialize_exit();
2284         return 0;
2285 bad:
2286         iwi_put_firmware(sc);
2287         wlan_serialize_exit();
2288         return 1;
2289 }
2290
2291 static void
2292 iwi_put_fw(struct iwi_fw *fw)
2293 {
2294         wlan_assert_serialized();
2295         wlan_serialize_exit();
2296         if (fw->fp != NULL) {
2297                 firmware_put(fw->fp, FIRMWARE_UNLOAD);
2298                 fw->fp = NULL;
2299         }
2300         wlan_serialize_enter();
2301         fw->data = NULL;
2302         fw->size = 0;
2303         fw->name = NULL;
2304 }
2305
2306 /*
2307  * Release any cached firmware images.
2308  */
2309 static void
2310 iwi_put_firmware(struct iwi_softc *sc)
2311 {
2312         iwi_put_fw(&sc->fw_uc);
2313         iwi_put_fw(&sc->fw_fw);
2314         iwi_put_fw(&sc->fw_boot);
2315 }
2316
2317 static int
2318 iwi_load_ucode(struct iwi_softc *sc, const struct iwi_fw *fw)
2319 {
2320         uint32_t tmp;
2321         const uint16_t *w;
2322         const char *uc = fw->data;
2323         size_t size = fw->size;
2324         int i, ntries, error;
2325
2326         error = 0;
2327         CSR_WRITE_4(sc, IWI_CSR_RST, CSR_READ_4(sc, IWI_CSR_RST) |
2328             IWI_RST_STOP_MASTER);
2329         for (ntries = 0; ntries < 5; ntries++) {
2330                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2331                         break;
2332                 DELAY(10);
2333         }
2334         if (ntries == 5) {
2335                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2336                 error = EIO;
2337                 goto fail;
2338         }
2339
2340         MEM_WRITE_4(sc, 0x3000e0, 0x80000000);
2341         DELAY(5000);
2342
2343         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2344         tmp &= ~IWI_RST_PRINCETON_RESET;
2345         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2346
2347         DELAY(5000);
2348         MEM_WRITE_4(sc, 0x3000e0, 0);
2349         DELAY(1000);
2350         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 1);
2351         DELAY(1000);
2352         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 0);
2353         DELAY(1000);
2354         MEM_WRITE_1(sc, 0x200000, 0x00);
2355         MEM_WRITE_1(sc, 0x200000, 0x40);
2356         DELAY(1000);
2357
2358         /* write microcode into adapter memory */
2359         for (w = (const uint16_t *)uc; size > 0; w++, size -= 2)
2360                 MEM_WRITE_2(sc, 0x200010, htole16(*w));
2361
2362         MEM_WRITE_1(sc, 0x200000, 0x00);
2363         MEM_WRITE_1(sc, 0x200000, 0x80);
2364
2365         /* wait until we get an answer */
2366         for (ntries = 0; ntries < 100; ntries++) {
2367                 if (MEM_READ_1(sc, 0x200000) & 1)
2368                         break;
2369                 DELAY(100);
2370         }
2371         if (ntries == 100) {
2372                 device_printf(sc->sc_dev,
2373                     "timeout waiting for ucode to initialize\n");
2374                 error = EIO;
2375                 goto fail;
2376         }
2377
2378         /* read the answer or the firmware will not initialize properly */
2379         for (i = 0; i < 7; i++)
2380                 MEM_READ_4(sc, 0x200004);
2381
2382         MEM_WRITE_1(sc, 0x200000, 0x00);
2383
2384 fail:
2385         return error;
2386 }
2387
2388 /* macro to handle unaligned little endian data in firmware image */
2389 #define GETLE32(p) ((p)[0] | (p)[1] << 8 | (p)[2] << 16 | (p)[3] << 24)
2390
2391 static int
2392 iwi_load_firmware(struct iwi_softc *sc, const struct iwi_fw *fw)
2393 {
2394         u_char *p, *end;
2395         uint32_t sentinel, ctl, src, dst, sum, len, mlen, tmp;
2396         int ntries, error;
2397
2398         /* copy firmware image to DMA memory */
2399         memcpy(sc->fw_virtaddr, fw->data, fw->size);
2400
2401         /* make sure the adapter will get up-to-date values */
2402         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_PREWRITE);
2403
2404         /* tell the adapter where the command blocks are stored */
2405         MEM_WRITE_4(sc, 0x3000a0, 0x27000);
2406
2407         /*
2408          * Store command blocks into adapter's internal memory using register
2409          * indirections. The adapter will read the firmware image through DMA
2410          * using information stored in command blocks.
2411          */
2412         src = sc->fw_physaddr;
2413         p = sc->fw_virtaddr;
2414         end = p + fw->size;
2415         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0x27000);
2416
2417         while (p < end) {
2418                 dst = GETLE32(p); p += 4; src += 4;
2419                 len = GETLE32(p); p += 4; src += 4;
2420                 p += len;
2421
2422                 while (len > 0) {
2423                         mlen = min(len, IWI_CB_MAXDATALEN);
2424
2425                         ctl = IWI_CB_DEFAULT_CTL | mlen;
2426                         sum = ctl ^ src ^ dst;
2427
2428                         /* write a command block */
2429                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, ctl);
2430                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, src);
2431                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, dst);
2432                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, sum);
2433
2434                         src += mlen;
2435                         dst += mlen;
2436                         len -= mlen;
2437                 }
2438         }
2439
2440         /* write a fictive final command block (sentinel) */
2441         sentinel = CSR_READ_4(sc, IWI_CSR_AUTOINC_ADDR);
2442         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2443
2444         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2445         tmp &= ~(IWI_RST_MASTER_DISABLED | IWI_RST_STOP_MASTER);
2446         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2447
2448         /* tell the adapter to start processing command blocks */
2449         MEM_WRITE_4(sc, 0x3000a4, 0x540100);
2450
2451         /* wait until the adapter reaches the sentinel */
2452         for (ntries = 0; ntries < 400; ntries++) {
2453                 if (MEM_READ_4(sc, 0x3000d0) >= sentinel)
2454                         break;
2455                 DELAY(100);
2456         }
2457         /* sync dma, just in case */
2458         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_POSTWRITE);
2459         if (ntries == 400) {
2460                 device_printf(sc->sc_dev,
2461                     "timeout processing command blocks for %s firmware\n",
2462                     fw->name);
2463                 return EIO;
2464         }
2465
2466         /* we're done with command blocks processing */
2467         MEM_WRITE_4(sc, 0x3000a4, 0x540c00);
2468
2469         /* allow interrupts so we know when the firmware is ready */
2470         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, IWI_INTR_MASK);
2471
2472         /* tell the adapter to initialize the firmware */
2473         CSR_WRITE_4(sc, IWI_CSR_RST, 0);
2474
2475         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2476         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_ALLOW_STANDBY);
2477
2478         /* wait at most one second for firmware initialization to complete */
2479         error = zsleep(sc, &wlan_global_serializer, 0, "iwiinit", hz);
2480         if (error != 0) {
2481                 device_printf(sc->sc_dev, "timeout waiting for firmware "
2482                             "initialization to complete\n");
2483         }
2484
2485         return error;
2486 }
2487
2488 static int
2489 iwi_setpowermode(struct iwi_softc *sc, struct ieee80211vap *vap)
2490 {
2491         uint32_t data;
2492
2493         if (vap->iv_flags & IEEE80211_F_PMGTON) {
2494                 /* XXX set more fine-grained operation */
2495                 data = htole32(IWI_POWER_MODE_MAX);
2496         } else
2497                 data = htole32(IWI_POWER_MODE_CAM);
2498
2499         DPRINTF(("Setting power mode to %u\n", le32toh(data)));
2500         return iwi_cmd(sc, IWI_CMD_SET_POWER_MODE, &data, sizeof data);
2501 }
2502
2503 static int
2504 iwi_setwepkeys(struct iwi_softc *sc, struct ieee80211vap *vap)
2505 {
2506         struct iwi_wep_key wepkey;
2507         struct ieee80211_key *wk;
2508         int error, i;
2509
2510         for (i = 0; i < IEEE80211_WEP_NKID; i++) {
2511                 wk = &vap->iv_nw_keys[i];
2512
2513                 wepkey.cmd = IWI_WEP_KEY_CMD_SETKEY;
2514                 wepkey.idx = i;
2515                 wepkey.len = wk->wk_keylen;
2516                 memset(wepkey.key, 0, sizeof wepkey.key);
2517                 memcpy(wepkey.key, wk->wk_key, wk->wk_keylen);
2518                 DPRINTF(("Setting wep key index %u len %u\n", wepkey.idx,
2519                     wepkey.len));
2520                 error = iwi_cmd(sc, IWI_CMD_SET_WEP_KEY, &wepkey,
2521                     sizeof wepkey);
2522                 if (error != 0)
2523                         return error;
2524         }
2525         return 0;
2526 }
2527
2528 static int
2529 iwi_config(struct iwi_softc *sc)
2530 {
2531         struct ifnet *ifp = sc->sc_ifp;
2532         struct ieee80211com *ic = ifp->if_l2com;
2533         struct iwi_configuration config;
2534         struct iwi_rateset rs;
2535         struct iwi_txpower power;
2536         uint32_t data;
2537         int error, i;
2538         const uint8_t *eaddr = IF_LLADDR(ifp);
2539
2540         DPRINTF(("Setting MAC address to %6D\n", eaddr, ":"));
2541         error = iwi_cmd(sc, IWI_CMD_SET_MAC_ADDRESS, IF_LLADDR(ifp),
2542             IEEE80211_ADDR_LEN);
2543         if (error != 0)
2544                 return error;
2545
2546         memset(&config, 0, sizeof config);
2547         config.bluetooth_coexistence = sc->bluetooth;
2548         config.silence_threshold = 0x1e;
2549         config.antenna = sc->antenna;
2550         config.multicast_enabled = 1;
2551         config.answer_pbreq = (ic->ic_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2552         config.disable_unicast_decryption = 1;
2553         config.disable_multicast_decryption = 1;
2554         DPRINTF(("Configuring adapter\n"));
2555         error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2556         if (error != 0)
2557                 return error;
2558         if (ic->ic_opmode == IEEE80211_M_IBSS) {
2559                 power.mode = IWI_MODE_11B;
2560                 power.nchan = 11;
2561                 for (i = 0; i < 11; i++) {
2562                         power.chan[i].chan = i + 1;
2563                         power.chan[i].power = IWI_TXPOWER_MAX;
2564                 }
2565                 DPRINTF(("Setting .11b channels tx power\n"));
2566                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2567                 if (error != 0)
2568                         return error;
2569
2570                 power.mode = IWI_MODE_11G;
2571                 DPRINTF(("Setting .11g channels tx power\n"));
2572                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2573                 if (error != 0)
2574                         return error;
2575         }
2576
2577         memset(&rs, 0, sizeof rs);
2578         rs.mode = IWI_MODE_11G;
2579         rs.type = IWI_RATESET_TYPE_SUPPORTED;
2580         rs.nrates = ic->ic_sup_rates[IEEE80211_MODE_11G].rs_nrates;
2581         memcpy(rs.rates, ic->ic_sup_rates[IEEE80211_MODE_11G].rs_rates,
2582             rs.nrates);
2583         DPRINTF(("Setting .11bg supported rates (%u)\n", rs.nrates));
2584         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2585         if (error != 0)
2586                 return error;
2587
2588         memset(&rs, 0, sizeof rs);
2589         rs.mode = IWI_MODE_11A;
2590         rs.type = IWI_RATESET_TYPE_SUPPORTED;
2591         rs.nrates = ic->ic_sup_rates[IEEE80211_MODE_11A].rs_nrates;
2592         memcpy(rs.rates, ic->ic_sup_rates[IEEE80211_MODE_11A].rs_rates,
2593             rs.nrates);
2594         DPRINTF(("Setting .11a supported rates (%u)\n", rs.nrates));
2595         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2596         if (error != 0)
2597                 return error;
2598
2599         data = htole32(karc4random());
2600         DPRINTF(("Setting initialization vector to %u\n", le32toh(data)));
2601         error = iwi_cmd(sc, IWI_CMD_SET_IV, &data, sizeof data);
2602         if (error != 0)
2603                 return error;
2604
2605         /* enable adapter */
2606         DPRINTF(("Enabling adapter\n"));
2607         return iwi_cmd(sc, IWI_CMD_ENABLE, NULL, 0);
2608 }
2609
2610 static __inline void
2611 set_scan_type(struct iwi_scan_ext *scan, int ix, int scan_type)
2612 {
2613         uint8_t *st = &scan->scan_type[ix / 2];
2614         if (ix % 2)
2615                 *st = (*st & 0xf0) | ((scan_type & 0xf) << 0);
2616         else
2617                 *st = (*st & 0x0f) | ((scan_type & 0xf) << 4);
2618 }
2619
2620 static int
2621 scan_type(const struct ieee80211_scan_state *ss,
2622         const struct ieee80211_channel *chan)
2623 {
2624         /* We can only set one essid for a directed scan */
2625         if (ss->ss_nssid != 0)
2626                 return IWI_SCAN_TYPE_BDIRECTED;
2627         if ((ss->ss_flags & IEEE80211_SCAN_ACTIVE) &&
2628             (chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0)
2629                 return IWI_SCAN_TYPE_BROADCAST;
2630         return IWI_SCAN_TYPE_PASSIVE;
2631 }
2632
2633 static __inline int
2634 scan_band(const struct ieee80211_channel *c)
2635 {
2636         return IEEE80211_IS_CHAN_5GHZ(c) ?  IWI_CHAN_5GHZ : IWI_CHAN_2GHZ;
2637 }
2638
2639 /*
2640  * Start a scan on the current channel or all channels.
2641  */
2642 static int
2643 iwi_scanchan(struct iwi_softc *sc, unsigned long maxdwell, int allchan)
2644 {
2645         struct ieee80211com *ic;
2646         struct ieee80211_channel *chan;
2647         struct ieee80211_scan_state *ss;
2648         struct iwi_scan_ext scan;
2649         int error = 0;
2650
2651         if (sc->fw_state == IWI_FW_SCANNING) {
2652                 /*
2653                  * This should not happen as we only trigger scan_next after
2654                  * completion
2655                  */
2656                 DPRINTF(("%s: called too early - still scanning\n", __func__));
2657                 return (EBUSY);
2658         }
2659         IWI_STATE_BEGIN(sc, IWI_FW_SCANNING);
2660
2661         ic = sc->sc_ifp->if_l2com;
2662         ss = ic->ic_scan;
2663
2664         memset(&scan, 0, sizeof scan);
2665         scan.full_scan_index = htole32(++sc->sc_scangen);
2666         scan.dwell_time[IWI_SCAN_TYPE_PASSIVE] = htole16(maxdwell);
2667         if (ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) {
2668                 /*
2669                  * Use very short dwell times for when we send probe request
2670                  * frames.  Without this bg scans hang.  Ideally this should
2671                  * be handled with early-termination as done by net80211 but
2672                  * that's not feasible (aborting a scan is problematic).
2673                  */
2674                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(30);
2675                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(30);
2676         } else {
2677                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(maxdwell);
2678                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(maxdwell);
2679         }
2680
2681         /* We can only set one essid for a directed scan */
2682         if (ss->ss_nssid != 0) {
2683                 error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ss->ss_ssid[0].ssid,
2684                     ss->ss_ssid[0].len);
2685                 if (error)
2686                         return (error);
2687         }
2688
2689         if (allchan) {
2690                 int i, next, band, b, bstart;
2691                 /*
2692                  * Convert scan list to run-length encoded channel list
2693                  * the firmware requires (preserving the order setup by
2694                  * net80211).  The first entry in each run specifies the
2695                  * band and the count of items in the run.
2696                  */
2697                 next = 0;               /* next open slot */
2698                 bstart = 0;             /* NB: not needed, silence compiler */
2699                 band = -1;              /* NB: impossible value */
2700                 KASSERT(ss->ss_last > 0, ("no channels"));
2701                 for (i = 0; i < ss->ss_last; i++) {
2702                         chan = ss->ss_chans[i];
2703                         b = scan_band(chan);
2704                         if (b != band) {
2705                                 if (band != -1)
2706                                         scan.channels[bstart] =
2707                                             (next - bstart) | band;
2708                                 /* NB: this allocates a slot for the run-len */
2709                                 band = b, bstart = next++;
2710                         }
2711                         if (next >= IWI_SCAN_CHANNELS) {
2712                                 DPRINTF(("truncating scan list\n"));
2713                                 break;
2714                         }
2715                         scan.channels[next] = ieee80211_chan2ieee(ic, chan);
2716                         set_scan_type(&scan, next, scan_type(ss, chan));
2717                         next++;
2718                 }
2719                 scan.channels[bstart] = (next - bstart) | band;
2720         } else {
2721                 /* Scan the current channel only */
2722                 chan = ic->ic_curchan;
2723                 scan.channels[0] = 1 | scan_band(chan);
2724                 scan.channels[1] = ieee80211_chan2ieee(ic, chan);
2725                 set_scan_type(&scan, 1, scan_type(ss, chan));
2726         }
2727 #ifdef IWI_DEBUG
2728         if (iwi_debug > 0) {
2729                 static const char *scantype[8] =
2730                    { "PSTOP", "PASV", "DIR", "BCAST", "BDIR", "5", "6", "7" };
2731                 int i;
2732                 kprintf("Scan request: index %u dwell %d/%d/%d\n"
2733                     , le32toh(scan.full_scan_index)
2734                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_PASSIVE])
2735                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BROADCAST])
2736                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED])
2737                 );
2738                 i = 0;
2739                 do {
2740                         int run = scan.channels[i];
2741                         if (run == 0)
2742                                 break;
2743                         kprintf("Scan %d %s channels:", run & 0x3f,
2744                             run & IWI_CHAN_2GHZ ? "2.4GHz" : "5GHz");
2745                         for (run &= 0x3f, i++; run > 0; run--, i++) {
2746                                 uint8_t type = scan.scan_type[i/2];
2747                                 kprintf(" %u/%s", scan.channels[i],
2748                                     scantype[(i & 1 ? type : type>>4) & 7]);
2749                         }
2750                         kprintf("\n");
2751                 } while (i < IWI_SCAN_CHANNELS);
2752         }
2753 #endif
2754
2755         return (iwi_cmd(sc, IWI_CMD_SCAN_EXT, &scan, sizeof scan));
2756 }
2757
2758 static int
2759 iwi_set_sensitivity(struct iwi_softc *sc, int8_t rssi_dbm)
2760 {
2761         struct iwi_sensitivity sens;
2762
2763         DPRINTF(("Setting sensitivity to %d\n", rssi_dbm));
2764
2765         memset(&sens, 0, sizeof sens);
2766         sens.rssi = htole16(rssi_dbm);
2767         return iwi_cmd(sc, IWI_CMD_SET_SENSITIVITY, &sens, sizeof sens);
2768 }
2769
2770 static int
2771 iwi_auth_and_assoc(struct iwi_softc *sc, struct ieee80211vap *vap)
2772 {
2773         struct ieee80211com *ic = vap->iv_ic;
2774         struct ifnet *ifp = vap->iv_ifp;
2775         struct ieee80211_node *ni = vap->iv_bss;
2776         struct iwi_configuration config;
2777         struct iwi_associate *assoc = &sc->assoc;
2778         struct iwi_rateset rs;
2779         uint16_t capinfo;
2780         uint32_t data;
2781         int error, mode;
2782
2783         if (sc->flags & IWI_FLAG_ASSOCIATED) {
2784                 DPRINTF(("Already associated\n"));
2785                 return (-1);
2786         }
2787
2788         IWI_STATE_BEGIN(sc, IWI_FW_ASSOCIATING);
2789         error = 0;
2790         mode = 0;
2791
2792         if (IEEE80211_IS_CHAN_A(ic->ic_curchan))
2793                 mode = IWI_MODE_11A;
2794         else if (IEEE80211_IS_CHAN_G(ic->ic_curchan))
2795                 mode = IWI_MODE_11G;
2796         if (IEEE80211_IS_CHAN_B(ic->ic_curchan))
2797                 mode = IWI_MODE_11B;
2798
2799         if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) {
2800                 memset(&config, 0, sizeof config);
2801                 config.bluetooth_coexistence = sc->bluetooth;
2802                 config.antenna = sc->antenna;
2803                 config.multicast_enabled = 1;
2804                 if (mode == IWI_MODE_11G)
2805                         config.use_protection = 1;
2806                 config.answer_pbreq =
2807                     (vap->iv_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2808                 config.disable_unicast_decryption = 1;
2809                 config.disable_multicast_decryption = 1;
2810                 DPRINTF(("Configuring adapter\n"));
2811                 error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2812                 if (error != 0)
2813                         goto done;
2814         }
2815
2816 #ifdef IWI_DEBUG
2817         if (iwi_debug > 0) {
2818                 kprintf("Setting ESSID to ");
2819                 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
2820                 kprintf("\n");
2821         }
2822 #endif
2823         error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ni->ni_essid, ni->ni_esslen);
2824         if (error != 0)
2825                 goto done;
2826
2827         error = iwi_setpowermode(sc, vap);
2828         if (error != 0)
2829                 goto done;
2830
2831         data = htole32(vap->iv_rtsthreshold);
2832         DPRINTF(("Setting RTS threshold to %u\n", le32toh(data)));
2833         error = iwi_cmd(sc, IWI_CMD_SET_RTS_THRESHOLD, &data, sizeof data);
2834         if (error != 0)
2835                 goto done;
2836
2837         data = htole32(vap->iv_fragthreshold);
2838         DPRINTF(("Setting fragmentation threshold to %u\n", le32toh(data)));
2839         error = iwi_cmd(sc, IWI_CMD_SET_FRAG_THRESHOLD, &data, sizeof data);
2840         if (error != 0)
2841                 goto done;
2842
2843         /* the rate set has already been "negotiated" */
2844         memset(&rs, 0, sizeof rs);
2845         rs.mode = mode;
2846         rs.type = IWI_RATESET_TYPE_NEGOTIATED;
2847         rs.nrates = ni->ni_rates.rs_nrates;
2848         if (rs.nrates > IWI_RATESET_SIZE) {
2849                 DPRINTF(("Truncating negotiated rate set from %u\n",
2850                     rs.nrates));
2851                 rs.nrates = IWI_RATESET_SIZE;
2852         }
2853         memcpy(rs.rates, ni->ni_rates.rs_rates, rs.nrates);
2854         DPRINTF(("Setting negotiated rates (%u)\n", rs.nrates));
2855         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2856         if (error != 0)
2857                 goto done;
2858
2859         memset(assoc, 0, sizeof *assoc);
2860
2861         if ((vap->iv_flags & IEEE80211_F_WME) && ni->ni_ies.wme_ie != NULL) {
2862                 /* NB: don't treat WME setup as failure */
2863                 if (iwi_wme_setparams(sc, ic) == 0 && iwi_wme_setie(sc) == 0)
2864                         assoc->policy |= htole16(IWI_POLICY_WME);
2865                 /* XXX complain on failure? */
2866         }
2867
2868         if (vap->iv_appie_wpa != NULL) {
2869                 struct ieee80211_appie *ie = vap->iv_appie_wpa;
2870
2871                 DPRINTF(("Setting optional IE (len=%u)\n", ie->ie_len));
2872                 error = iwi_cmd(sc, IWI_CMD_SET_OPTIE, ie->ie_data, ie->ie_len);
2873                 if (error != 0)
2874                         goto done;
2875         }
2876
2877         error = iwi_set_sensitivity(sc, ic->ic_node_getrssi(ni));
2878         if (error != 0)
2879                 goto done;
2880
2881         assoc->mode = mode;
2882         assoc->chan = ic->ic_curchan->ic_ieee;
2883         /*
2884          * NB: do not arrange for shared key auth w/o privacy
2885          *     (i.e. a wep key); it causes a firmware error.
2886          */
2887         if ((vap->iv_flags & IEEE80211_F_PRIVACY) &&
2888             ni->ni_authmode == IEEE80211_AUTH_SHARED) {
2889                 assoc->auth = IWI_AUTH_SHARED;
2890                 /*
2891                  * It's possible to have privacy marked but no default
2892                  * key setup.  This typically is due to a user app bug
2893                  * but if we blindly grab the key the firmware will
2894                  * barf so avoid it for now.
2895                  */
2896                 if (vap->iv_def_txkey != IEEE80211_KEYIX_NONE)
2897                         assoc->auth |= vap->iv_def_txkey << 4;
2898
2899                 error = iwi_setwepkeys(sc, vap);
2900                 if (error != 0)
2901                         goto done;
2902         }
2903         if (vap->iv_flags & IEEE80211_F_WPA)
2904                 assoc->policy |= htole16(IWI_POLICY_WPA);
2905         if (vap->iv_opmode == IEEE80211_M_IBSS && ni->ni_tstamp.tsf == 0)
2906                 assoc->type = IWI_HC_IBSS_START;
2907         else
2908                 assoc->type = IWI_HC_ASSOC;
2909         memcpy(assoc->tstamp, ni->ni_tstamp.data, 8);
2910
2911         if (vap->iv_opmode == IEEE80211_M_IBSS)
2912                 capinfo = IEEE80211_CAPINFO_IBSS;
2913         else
2914                 capinfo = IEEE80211_CAPINFO_ESS;
2915         if (vap->iv_flags & IEEE80211_F_PRIVACY)
2916                 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2917         if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2918             IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
2919                 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2920         if (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)
2921                 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2922         assoc->capinfo = htole16(capinfo);
2923
2924         assoc->lintval = htole16(ic->ic_lintval);
2925         assoc->intval = htole16(ni->ni_intval);
2926         IEEE80211_ADDR_COPY(assoc->bssid, ni->ni_bssid);
2927         if (vap->iv_opmode == IEEE80211_M_IBSS)
2928                 IEEE80211_ADDR_COPY(assoc->dst, ifp->if_broadcastaddr);
2929         else
2930                 IEEE80211_ADDR_COPY(assoc->dst, ni->ni_bssid);
2931
2932         DPRINTF(("%s bssid %6D dst %6D channel %u policy 0x%x "
2933             "auth %u capinfo 0x%x lintval %u bintval %u\n",
2934             assoc->type == IWI_HC_IBSS_START ? "Start" : "Join",
2935             assoc->bssid, ":", assoc->dst, ":",
2936             assoc->chan, le16toh(assoc->policy), assoc->auth,
2937             le16toh(assoc->capinfo), le16toh(assoc->lintval),
2938             le16toh(assoc->intval)));
2939         error = iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
2940 done:
2941         if (error)
2942                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
2943
2944         return (error);
2945 }
2946
2947 static void
2948 iwi_disassoc_task(void *arg, int pending)
2949 {
2950         struct iwi_softc *sc = arg;
2951
2952         wlan_serialize_enter();
2953         iwi_disassociate(sc, 0);
2954         wlan_serialize_exit();
2955 }
2956
2957 static int
2958 iwi_disassociate(struct iwi_softc *sc, int quiet)
2959 {
2960         struct iwi_associate *assoc = &sc->assoc;
2961
2962         if ((sc->flags & IWI_FLAG_ASSOCIATED) == 0) {
2963                 DPRINTF(("Not associated\n"));
2964                 return (-1);
2965         }
2966
2967         IWI_STATE_BEGIN(sc, IWI_FW_DISASSOCIATING);
2968
2969         if (quiet)
2970                 assoc->type = IWI_HC_DISASSOC_QUIET;
2971         else
2972                 assoc->type = IWI_HC_DISASSOC;
2973
2974         DPRINTF(("Trying to disassociate from %6D channel %u\n",
2975             assoc->bssid, ":", assoc->chan));
2976         return iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
2977 }
2978
2979 /*
2980  * release dma resources for the firmware
2981  */
2982 static void
2983 iwi_release_fw_dma(struct iwi_softc *sc)
2984 {
2985         if (sc->fw_flags & IWI_FW_HAVE_PHY)
2986                 bus_dmamap_unload(sc->fw_dmat, sc->fw_map);
2987         if (sc->fw_flags & IWI_FW_HAVE_MAP)
2988                 bus_dmamem_free(sc->fw_dmat, sc->fw_virtaddr, sc->fw_map);
2989         if (sc->fw_flags & IWI_FW_HAVE_DMAT)
2990                 bus_dma_tag_destroy(sc->fw_dmat);
2991
2992         sc->fw_flags = 0;
2993         sc->fw_dma_size = 0;
2994         sc->fw_dmat = NULL;
2995         sc->fw_map = NULL;
2996         sc->fw_physaddr = 0;
2997         sc->fw_virtaddr = NULL;
2998 }
2999
3000 /*
3001  * allocate the dma descriptor for the firmware.
3002  * Return 0 on success, 1 on error.
3003  * Must be called unlocked, protected by IWI_FLAG_FW_LOADING.
3004  */
3005 static int
3006 iwi_init_fw_dma(struct iwi_softc *sc, int size)
3007 {
3008         if (sc->fw_dma_size >= size)
3009                 return 0;
3010         if (bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT,
3011             BUS_SPACE_MAXADDR, NULL, NULL, size, 1, size,
3012             0, &sc->fw_dmat) != 0) {
3013                 device_printf(sc->sc_dev,
3014                     "could not create firmware DMA tag\n");
3015                 goto error;
3016         }
3017         sc->fw_flags |= IWI_FW_HAVE_DMAT;
3018         if (bus_dmamem_alloc(sc->fw_dmat, &sc->fw_virtaddr, 0,
3019             &sc->fw_map) != 0) {
3020                 device_printf(sc->sc_dev,
3021                     "could not allocate firmware DMA memory\n");
3022                 goto error;
3023         }
3024         sc->fw_flags |= IWI_FW_HAVE_MAP;
3025         if (bus_dmamap_load(sc->fw_dmat, sc->fw_map, sc->fw_virtaddr,
3026             size, iwi_dma_map_addr, &sc->fw_physaddr, 0) != 0) {
3027                 device_printf(sc->sc_dev, "could not load firmware DMA map\n");
3028                 goto error;
3029         }
3030         sc->fw_flags |= IWI_FW_HAVE_PHY;
3031         sc->fw_dma_size = size;
3032         return 0;
3033
3034 error:
3035         iwi_release_fw_dma(sc);
3036         return 1;
3037 }
3038
3039 static void
3040 iwi_init_locked(struct iwi_softc *sc)
3041 {
3042         struct ifnet *ifp = sc->sc_ifp;
3043         struct iwi_rx_data *data;
3044         int i;
3045
3046         if (sc->fw_state == IWI_FW_LOADING) {
3047                 device_printf(sc->sc_dev, "%s: already loading\n", __func__);
3048                 return;         /* XXX: condvar? */
3049         }
3050
3051         iwi_stop_locked(sc);
3052
3053         IWI_STATE_BEGIN(sc, IWI_FW_LOADING);
3054
3055         if (iwi_reset(sc) != 0) {
3056                 device_printf(sc->sc_dev, "could not reset adapter\n");
3057                 goto fail;
3058         }
3059         if (iwi_load_firmware(sc, &sc->fw_boot) != 0) {
3060                 device_printf(sc->sc_dev,
3061                     "could not load boot firmware %s\n", sc->fw_boot.name);
3062                 goto fail;
3063         }
3064         if (iwi_load_ucode(sc, &sc->fw_uc) != 0) {
3065                 device_printf(sc->sc_dev,
3066                     "could not load microcode %s\n", sc->fw_uc.name);
3067                 goto fail;
3068         }
3069
3070         iwi_stop_master(sc);
3071
3072         CSR_WRITE_4(sc, IWI_CSR_CMD_BASE, sc->cmdq.physaddr);
3073         CSR_WRITE_4(sc, IWI_CSR_CMD_SIZE, sc->cmdq.count);
3074         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
3075
3076         CSR_WRITE_4(sc, IWI_CSR_TX1_BASE, sc->txq[0].physaddr);
3077         CSR_WRITE_4(sc, IWI_CSR_TX1_SIZE, sc->txq[0].count);
3078         CSR_WRITE_4(sc, IWI_CSR_TX1_WIDX, sc->txq[0].cur);
3079
3080         CSR_WRITE_4(sc, IWI_CSR_TX2_BASE, sc->txq[1].physaddr);
3081         CSR_WRITE_4(sc, IWI_CSR_TX2_SIZE, sc->txq[1].count);
3082         CSR_WRITE_4(sc, IWI_CSR_TX2_WIDX, sc->txq[1].cur);
3083
3084         CSR_WRITE_4(sc, IWI_CSR_TX3_BASE, sc->txq[2].physaddr);
3085         CSR_WRITE_4(sc, IWI_CSR_TX3_SIZE, sc->txq[2].count);
3086         CSR_WRITE_4(sc, IWI_CSR_TX3_WIDX, sc->txq[2].cur);
3087
3088         CSR_WRITE_4(sc, IWI_CSR_TX4_BASE, sc->txq[3].physaddr);
3089         CSR_WRITE_4(sc, IWI_CSR_TX4_SIZE, sc->txq[3].count);
3090         CSR_WRITE_4(sc, IWI_CSR_TX4_WIDX, sc->txq[3].cur);
3091
3092         for (i = 0; i < sc->rxq.count; i++) {
3093                 data = &sc->rxq.data[i];
3094                 CSR_WRITE_4(sc, data->reg, data->physaddr);
3095         }
3096
3097         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, sc->rxq.count - 1);
3098
3099         if (iwi_load_firmware(sc, &sc->fw_fw) != 0) {
3100                 device_printf(sc->sc_dev,
3101                     "could not load main firmware %s\n", sc->fw_fw.name);
3102                 goto fail;
3103         }
3104         sc->flags |= IWI_FLAG_FW_INITED;
3105
3106         IWI_STATE_END(sc, IWI_FW_LOADING);
3107
3108         if (iwi_config(sc) != 0) {
3109                 device_printf(sc->sc_dev, "unable to enable adapter\n");
3110                 goto fail2;
3111         }
3112
3113         callout_reset(&sc->sc_wdtimer_callout, hz, iwi_watchdog, sc);
3114         ifq_clr_oactive(&ifp->if_snd);
3115         ifp->if_flags |= IFF_RUNNING;
3116         return;
3117 fail:
3118         IWI_STATE_END(sc, IWI_FW_LOADING);
3119 fail2:
3120         iwi_stop_locked(sc);
3121 }
3122
3123 static void
3124 iwi_init(void *priv)
3125 {
3126         struct iwi_softc *sc = priv;
3127         struct ifnet *ifp = sc->sc_ifp;
3128         struct ieee80211com *ic = ifp->if_l2com;
3129
3130         iwi_init_locked(sc);
3131
3132         if (ifp->if_flags & IFF_RUNNING)
3133                 ieee80211_start_all(ic);
3134 }
3135
3136 static void
3137 iwi_stop_locked(void *priv)
3138 {
3139         struct iwi_softc *sc = priv;
3140         struct ifnet *ifp = sc->sc_ifp;
3141
3142         ifp->if_flags &= ~IFF_RUNNING;
3143         ifq_clr_oactive(&ifp->if_snd);
3144
3145         if (sc->sc_softled) {
3146                 callout_stop(&sc->sc_ledtimer_callout);
3147                 sc->sc_blinking = 0;
3148         }
3149         callout_stop(&sc->sc_wdtimer_callout);
3150         callout_stop(&sc->sc_rftimer_callout);
3151
3152         iwi_stop_master(sc);
3153
3154         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_SOFT_RESET);
3155
3156         /* reset rings */
3157         iwi_reset_cmd_ring(sc, &sc->cmdq);
3158         iwi_reset_tx_ring(sc, &sc->txq[0]);
3159         iwi_reset_tx_ring(sc, &sc->txq[1]);
3160         iwi_reset_tx_ring(sc, &sc->txq[2]);
3161         iwi_reset_tx_ring(sc, &sc->txq[3]);
3162         iwi_reset_rx_ring(sc, &sc->rxq);
3163
3164         sc->sc_tx_timer = 0;
3165         sc->sc_state_timer = 0;
3166         sc->sc_busy_timer = 0;
3167         sc->flags &= ~(IWI_FLAG_BUSY | IWI_FLAG_ASSOCIATED);
3168         sc->fw_state = IWI_FW_IDLE;
3169         wakeup(sc);
3170 }
3171
3172 static void
3173 iwi_stop(struct iwi_softc *sc)
3174 {
3175         iwi_stop_locked(sc);
3176 }
3177
3178 static void
3179 iwi_restart_task(void *arg, int npending)
3180 {
3181         struct iwi_softc *sc = arg;
3182
3183         wlan_serialize_enter();
3184         iwi_init(sc);
3185         wlan_serialize_exit();
3186 }
3187
3188 /*
3189  * Return whether or not the radio is enabled in hardware
3190  * (i.e. the rfkill switch is "off").
3191  */
3192 static int
3193 iwi_getrfkill(struct iwi_softc *sc)
3194 {
3195         return (CSR_READ_4(sc, IWI_CSR_IO) & IWI_IO_RADIO_ENABLED) == 0;
3196 }
3197
3198 static void
3199 iwi_radio_on_task(void *arg, int pending)
3200 {
3201         struct iwi_softc *sc = arg;
3202         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
3203
3204         wlan_serialize_enter();
3205         device_printf(sc->sc_dev, "radio turned on\n");
3206
3207         iwi_init(sc);
3208         ieee80211_notify_radio(ic, 1);
3209         wlan_serialize_exit();
3210 }
3211
3212 static void
3213 iwi_rfkill_poll(void *arg)
3214 {
3215         struct iwi_softc *sc = arg;
3216
3217         /*
3218          * Check for a change in rfkill state.  We get an
3219          * interrupt when a radio is disabled but not when
3220          * it is enabled so we must poll for the latter.
3221          */
3222         if (!iwi_getrfkill(sc)) {
3223                 struct ifnet *ifp = sc->sc_ifp;
3224                 struct ieee80211com *ic = ifp->if_l2com;
3225
3226                 ieee80211_runtask(ic, &sc->sc_radiontask);
3227                 return;
3228         }
3229         callout_reset(&sc->sc_rftimer_callout, 2*hz, iwi_rfkill_poll, sc);
3230 }
3231
3232 static void
3233 iwi_radio_off_task(void *arg, int pending)
3234 {
3235         struct iwi_softc *sc = arg;
3236         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
3237
3238         wlan_serialize_enter();
3239         device_printf(sc->sc_dev, "radio turned off\n");
3240
3241         ieee80211_notify_radio(ic, 0);
3242
3243         iwi_stop_locked(sc);
3244         iwi_rfkill_poll(sc);
3245         wlan_serialize_exit();
3246 }
3247
3248 static int
3249 iwi_sysctl_stats(SYSCTL_HANDLER_ARGS)
3250 {
3251         struct iwi_softc *sc = arg1;
3252         uint32_t size, buf[128];
3253
3254         memset(buf, 0, sizeof buf);
3255
3256         if (!(sc->flags & IWI_FLAG_FW_INITED))
3257                 return SYSCTL_OUT(req, buf, sizeof buf);
3258
3259         size = min(CSR_READ_4(sc, IWI_CSR_TABLE0_SIZE), 128 - 1);
3260         CSR_READ_REGION_4(sc, IWI_CSR_TABLE0_BASE, &buf[1], size);
3261
3262         return SYSCTL_OUT(req, buf, size);
3263 }
3264
3265 static int
3266 iwi_sysctl_radio(SYSCTL_HANDLER_ARGS)
3267 {
3268         struct iwi_softc *sc = arg1;
3269         int val = !iwi_getrfkill(sc);
3270
3271         return SYSCTL_OUT(req, &val, sizeof val);
3272 }
3273
3274 /*
3275  * Add sysctl knobs.
3276  */
3277 static void
3278 iwi_sysctlattach(struct iwi_softc *sc)
3279 {
3280         struct sysctl_ctx_list *ctx;
3281         struct sysctl_oid *tree;
3282
3283         ctx = &sc->sc_sysctl_ctx;
3284         sysctl_ctx_init(ctx);
3285
3286         tree = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_hw),
3287                                OID_AUTO,
3288                                device_get_nameunit(sc->sc_dev),
3289                                CTLFLAG_RD, 0, "");
3290         if (tree == NULL) {
3291                 device_printf(sc->sc_dev, "can't add sysctl node\n");
3292                 return;
3293         }
3294
3295         sc->sc_sysctl_tree = tree;
3296
3297         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "radio",
3298             CTLTYPE_INT | CTLFLAG_RD, sc, 0, iwi_sysctl_radio, "I",
3299             "radio transmitter switch state (0=off, 1=on)");
3300
3301         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "stats",
3302             CTLTYPE_OPAQUE | CTLFLAG_RD, sc, 0, iwi_sysctl_stats, "S",
3303             "statistics");
3304
3305         sc->bluetooth = 0;
3306         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "bluetooth",
3307             CTLFLAG_RW, &sc->bluetooth, 0, "bluetooth coexistence");
3308
3309         sc->antenna = IWI_ANTENNA_AUTO;
3310         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "antenna",
3311             CTLFLAG_RW, &sc->antenna, 0, "antenna (0=auto)");
3312 }
3313
3314 /*
3315  * LED support.
3316  *
3317  * Different cards have different capabilities.  Some have three
3318  * led's while others have only one.  The linux ipw driver defines
3319  * led's for link state (associated or not), band (11a, 11g, 11b),
3320  * and for link activity.  We use one led and vary the blink rate
3321  * according to the tx/rx traffic a la the ath driver.
3322  */
3323
3324 static __inline uint32_t
3325 iwi_toggle_event(uint32_t r)
3326 {
3327         return r &~ (IWI_RST_STANDBY | IWI_RST_GATE_ODMA |
3328                      IWI_RST_GATE_IDMA | IWI_RST_GATE_ADMA);
3329 }
3330
3331 static uint32_t
3332 iwi_read_event(struct iwi_softc *sc)
3333 {
3334         return MEM_READ_4(sc, IWI_MEM_EEPROM_EVENT);
3335 }
3336
3337 static void
3338 iwi_write_event(struct iwi_softc *sc, uint32_t v)
3339 {
3340         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, v);
3341 }
3342
3343 static void
3344 iwi_led_done(void *arg)
3345 {
3346         struct iwi_softc *sc = arg;
3347
3348         sc->sc_blinking = 0;
3349 }
3350
3351 /*
3352  * Turn the activity LED off: flip the pin and then set a timer so no
3353  * update will happen for the specified duration.
3354  */
3355 static void
3356 iwi_led_off(void *arg)
3357 {
3358         struct iwi_softc *sc = arg;
3359         uint32_t v;
3360
3361         v = iwi_read_event(sc);
3362         v &= ~sc->sc_ledpin;
3363         iwi_write_event(sc, iwi_toggle_event(v));
3364         callout_reset(&sc->sc_ledtimer_callout, sc->sc_ledoff, iwi_led_done, sc);
3365 }
3366
3367 /*
3368  * Blink the LED according to the specified on/off times.
3369  */
3370 static void
3371 iwi_led_blink(struct iwi_softc *sc, int on, int off)
3372 {
3373         uint32_t v;
3374
3375         v = iwi_read_event(sc);
3376         v |= sc->sc_ledpin;
3377         iwi_write_event(sc, iwi_toggle_event(v));
3378         sc->sc_blinking = 1;
3379         sc->sc_ledoff = off;
3380         callout_reset(&sc->sc_ledtimer_callout, on, iwi_led_off, sc);
3381 }
3382
3383 static void
3384 iwi_led_event(struct iwi_softc *sc, int event)
3385 {
3386         /* NB: on/off times from the Atheros NDIS driver, w/ permission */
3387         static const struct {
3388                 u_int           rate;           /* tx/rx iwi rate */
3389                 u_int16_t       timeOn;         /* LED on time (ms) */
3390                 u_int16_t       timeOff;        /* LED off time (ms) */
3391         } blinkrates[] = {
3392                 { IWI_RATE_OFDM54, 40,  10 },
3393                 { IWI_RATE_OFDM48, 44,  11 },
3394                 { IWI_RATE_OFDM36, 50,  13 },
3395                 { IWI_RATE_OFDM24, 57,  14 },
3396                 { IWI_RATE_OFDM18, 67,  16 },
3397                 { IWI_RATE_OFDM12, 80,  20 },
3398                 { IWI_RATE_DS11,  100,  25 },
3399                 { IWI_RATE_OFDM9, 133,  34 },
3400                 { IWI_RATE_OFDM6, 160,  40 },
3401                 { IWI_RATE_DS5,   200,  50 },
3402                 {            6,   240,  58 },   /* XXX 3Mb/s if it existed */
3403                 { IWI_RATE_DS2,   267,  66 },
3404                 { IWI_RATE_DS1,   400, 100 },
3405                 {            0,   500, 130 },   /* unknown rate/polling */
3406         };
3407         uint32_t txrate;
3408         int j = 0;                      /* XXX silence compiler */
3409
3410         sc->sc_ledevent = ticks;        /* time of last event */
3411         if (sc->sc_blinking)            /* don't interrupt active blink */
3412                 return;
3413         switch (event) {
3414         case IWI_LED_POLL:
3415                 j = NELEM(blinkrates)-1;
3416                 break;
3417         case IWI_LED_TX:
3418                 /* read current transmission rate from adapter */
3419                 txrate = CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE);
3420                 if (blinkrates[sc->sc_txrix].rate != txrate) {
3421                         for (j = 0; j < NELEM(blinkrates)-1; j++)
3422                                 if (blinkrates[j].rate == txrate)
3423                                         break;
3424                         sc->sc_txrix = j;
3425                 } else
3426                         j = sc->sc_txrix;
3427                 break;
3428         case IWI_LED_RX:
3429                 if (blinkrates[sc->sc_rxrix].rate != sc->sc_rxrate) {
3430                         for (j = 0; j < NELEM(blinkrates)-1; j++)
3431                                 if (blinkrates[j].rate == sc->sc_rxrate)
3432                                         break;
3433                         sc->sc_rxrix = j;
3434                 } else
3435                         j = sc->sc_rxrix;
3436                 break;
3437         }
3438         /* XXX beware of overflow */
3439         iwi_led_blink(sc, (blinkrates[j].timeOn * hz) / 1000,
3440                 (blinkrates[j].timeOff * hz) / 1000);
3441 }
3442
3443 static int
3444 iwi_sysctl_softled(SYSCTL_HANDLER_ARGS)
3445 {
3446         struct iwi_softc *sc = arg1;
3447         int softled = sc->sc_softled;
3448         int error;
3449
3450         error = sysctl_handle_int(oidp, &softled, 0, req);
3451         if (error || !req->newptr)
3452                 return error;
3453         softled = (softled != 0);
3454         if (softled != sc->sc_softled) {
3455                 if (softled) {
3456                         uint32_t v = iwi_read_event(sc);
3457                         v &= ~sc->sc_ledpin;
3458                         iwi_write_event(sc, iwi_toggle_event(v));
3459                 }
3460                 sc->sc_softled = softled;
3461         }
3462         return 0;
3463 }
3464
3465 static void
3466 iwi_ledattach(struct iwi_softc *sc)
3467 {
3468         struct sysctl_ctx_list *ctx = &sc->sc_sysctl_ctx;
3469         struct sysctl_oid *tree = sc->sc_sysctl_tree;
3470
3471         sc->sc_blinking = 0;
3472         sc->sc_ledstate = 1;
3473         sc->sc_ledidle = (2700*hz)/1000;        /* 2.7sec */
3474         callout_init(&sc->sc_ledtimer_callout);
3475
3476         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3477                 "softled", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
3478                 iwi_sysctl_softled, "I", "enable/disable software LED support");
3479         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3480                 "ledpin", CTLFLAG_RW, &sc->sc_ledpin, 0,
3481                 "pin setting to turn activity LED on");
3482         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3483                 "ledidle", CTLFLAG_RW, &sc->sc_ledidle, 0,
3484                 "idle time for inactivity LED (ticks)");
3485         /* XXX for debugging */
3486         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3487                 "nictype", CTLFLAG_RD, &sc->sc_nictype, 0,
3488                 "NIC type from EEPROM");
3489
3490         sc->sc_ledpin = IWI_RST_LED_ACTIVITY;
3491         sc->sc_softled = 1;
3492
3493         sc->sc_nictype = (iwi_read_prom_word(sc, IWI_EEPROM_NIC) >> 8) & 0xff;
3494         if (sc->sc_nictype == 1) {
3495                 /*
3496                  * NB: led's are reversed.
3497                  */
3498                 sc->sc_ledpin = IWI_RST_LED_ASSOCIATED;
3499         }
3500 }
3501
3502 static void
3503 iwi_scan_start(struct ieee80211com *ic)
3504 {
3505         /* ignore */
3506 }
3507
3508 static void
3509 iwi_set_channel(struct ieee80211com *ic)
3510 {
3511         struct ifnet *ifp = ic->ic_ifp;
3512         struct iwi_softc *sc = ifp->if_softc;
3513         if (sc->fw_state == IWI_FW_IDLE)
3514                 iwi_setcurchan(sc, ic->ic_curchan->ic_ieee);
3515 }
3516
3517 static void
3518 iwi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
3519 {
3520         struct ieee80211vap *vap = ss->ss_vap;
3521         struct ifnet *ifp = vap->iv_ic->ic_ifp;
3522         struct iwi_softc *sc = ifp->if_softc;
3523
3524         if (iwi_scanchan(sc, maxdwell, 0))
3525                 ieee80211_cancel_scan(vap);
3526 }
3527
3528 static void
3529 iwi_scan_mindwell(struct ieee80211_scan_state *ss)
3530 {
3531         /* NB: don't try to abort scan; wait for firmware to finish */
3532 }
3533
3534 static void
3535 iwi_scan_end(struct ieee80211com *ic)
3536 {
3537         struct ifnet *ifp = ic->ic_ifp;
3538         struct iwi_softc *sc = ifp->if_softc;
3539
3540         sc->flags &= ~IWI_FLAG_CHANNEL_SCAN;
3541         /* NB: make sure we're still scanning */
3542         if (sc->fw_state == IWI_FW_SCANNING)
3543                 iwi_cmd(sc, IWI_CMD_ABORT_SCAN, NULL, 0);
3544 }