sys/dev/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
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 /*-
  34  * Intel(R) PRO/Wireless 2200BG/2225BG/2915ABG driver
  35  * http://www.intel.com/network/connectivity/products/wireless/prowireless_mobile.htm
  36  */
  37
  38 #include <sys/param.h>
  39 #include <sys/sysctl.h>
  40 #include <sys/sockio.h>
  41 #include <sys/mbuf.h>
  42 #include <sys/kernel.h>
  43 #include <sys/socket.h>
  44 #include <sys/systm.h>
  45 #include <sys/malloc.h>
  46 #include <sys/lock.h>
  47 #include <sys/mutex.h>
  48 #include <sys/module.h>
  49 #include <sys/bus.h>
  50 #include <sys/endian.h>
  51 #include <sys/proc.h>
  52 #include <sys/mount.h>
  53 #include <sys/namei.h>
  54 #include <sys/linker.h>
  55 #include <sys/firmware.h>
  56 #include <sys/taskqueue.h>
  57
  58 #include <machine/bus.h>
  59 #include <machine/resource.h>
  60 #include <sys/rman.h>
  61
  62 #include <dev/pci/pcireg.h>
  63 #include <dev/pci/pcivar.h>
  64
  65 #include <net/bpf.h>
  66 #include <net/if.h>
  67 #include <net/if_var.h>
  68 #include <net/if_arp.h>
  69 #include <net/ethernet.h>
  70 #include <net/if_dl.h>
  71 #include <net/if_media.h>
  72 #include <net/if_types.h>
  73
  74 #include <net80211/ieee80211_var.h>
  75 #include <net80211/ieee80211_radiotap.h>
  76 #include <net80211/ieee80211_input.h>
  77 #include <net80211/ieee80211_regdomain.h>
  78
  79 #include <netinet/in.h>
  80 #include <netinet/in_systm.h>
  81 #include <netinet/in_var.h>
  82 #include <netinet/ip.h>
  83 #include <netinet/if_ether.h>
  84
  85 #include <dev/iwi/if_iwireg.h>
  86 #include <dev/iwi/if_iwivar.h>
  87 #include <dev/iwi/if_iwi_ioctl.h>
  88
  89 #define IWI_DEBUG
  90 #ifdef IWI_DEBUG
  91 #define DPRINTF(x)      do { if (iwi_debug > 0) printf x; } while (0)
  92 #define DPRINTFN(n, x)  do { if (iwi_debug >= (n)) printf x; } while (0)
  93 int iwi_debug = 0;
  94 SYSCTL_INT(_debug, OID_AUTO, iwi, CTLFLAG_RW, &iwi_debug, 0, "iwi debug level");
  95
  96 static const char *iwi_fw_states[] = {
  97         "IDLE",                 /* IWI_FW_IDLE */
  98         "LOADING",              /* IWI_FW_LOADING */
  99         "ASSOCIATING",          /* IWI_FW_ASSOCIATING */
 100         "DISASSOCIATING",       /* IWI_FW_DISASSOCIATING */
 101         "SCANNING",             /* IWI_FW_SCANNING */
 102 };
 103 #else
 104 #define DPRINTF(x)
 105 #define DPRINTFN(n, x)
 106 #endif
 107
 108 MODULE_DEPEND(iwi, pci,  1, 1, 1);
 109 MODULE_DEPEND(iwi, wlan, 1, 1, 1);
 110 MODULE_DEPEND(iwi, firmware, 1, 1, 1);
 111
 112 enum {
 113         IWI_LED_TX,
 114         IWI_LED_RX,
 115         IWI_LED_POLL,
 116 };
 117
 118 struct iwi_ident {
 119         uint16_t        vendor;
 120         uint16_t        device;
 121         const char      *name;
 122 };
 123
 124 static const struct iwi_ident iwi_ident_table[] = {
 125         { 0x8086, 0x4220, "Intel(R) PRO/Wireless 2200BG" },
 126         { 0x8086, 0x4221, "Intel(R) PRO/Wireless 2225BG" },
 127         { 0x8086, 0x4223, "Intel(R) PRO/Wireless 2915ABG" },
 128         { 0x8086, 0x4224, "Intel(R) PRO/Wireless 2915ABG" },
 129
 130         { 0, 0, NULL }
 131 };
 132
 133 static struct ieee80211vap *iwi_vap_create(struct ieee80211com *,
 134                     const char [IFNAMSIZ], int, enum ieee80211_opmode, int,
 135                     const uint8_t [IEEE80211_ADDR_LEN],
 136                     const uint8_t [IEEE80211_ADDR_LEN]);
 137 static void     iwi_vap_delete(struct ieee80211vap *);
 138 static void     iwi_dma_map_addr(void *, bus_dma_segment_t *, int, int);
 139 static int      iwi_alloc_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *,
 140                     int);
 141 static void     iwi_reset_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 142 static void     iwi_free_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 143 static int      iwi_alloc_tx_ring(struct iwi_softc *, struct iwi_tx_ring *,
 144                     int, bus_addr_t, bus_addr_t);
 145 static void     iwi_reset_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 146 static void     iwi_free_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 147 static int      iwi_alloc_rx_ring(struct iwi_softc *, struct iwi_rx_ring *,
 148                     int);
 149 static void     iwi_reset_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 150 static void     iwi_free_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 151 static struct ieee80211_node *iwi_node_alloc(struct ieee80211vap *,
 152                     const uint8_t [IEEE80211_ADDR_LEN]);
 153 static void     iwi_node_free(struct ieee80211_node *);
 154 static void     iwi_media_status(struct ifnet *, struct ifmediareq *);
 155 static int      iwi_newstate(struct ieee80211vap *, enum ieee80211_state, int);
 156 static void     iwi_wme_init(struct iwi_softc *);
 157 static int      iwi_wme_setparams(struct iwi_softc *, struct ieee80211com *);
 158 static void     iwi_update_wme(void *, int);
 159 static int      iwi_wme_update(struct ieee80211com *);
 160 static uint16_t iwi_read_prom_word(struct iwi_softc *, uint8_t);
 161 static void     iwi_frame_intr(struct iwi_softc *, struct iwi_rx_data *, int,
 162                     struct iwi_frame *);
 163 static void     iwi_notification_intr(struct iwi_softc *, struct iwi_notif *);
 164 static void     iwi_rx_intr(struct iwi_softc *);
 165 static void     iwi_tx_intr(struct iwi_softc *, struct iwi_tx_ring *);
 166 static void     iwi_intr(void *);
 167 static int      iwi_cmd(struct iwi_softc *, uint8_t, void *, uint8_t);
 168 static void     iwi_write_ibssnode(struct iwi_softc *, const u_int8_t [], int);
 169 static int      iwi_tx_start(struct ifnet *, struct mbuf *,
 170                     struct ieee80211_node *, int);
 171 static int      iwi_raw_xmit(struct ieee80211_node *, struct mbuf *,
 172                     const struct ieee80211_bpf_params *);
 173 static void     iwi_start_locked(struct ifnet *);
 174 static void     iwi_start(struct ifnet *);
 175 static void     iwi_watchdog(void *);
 176 static int      iwi_ioctl(struct ifnet *, u_long, caddr_t);
 177 static void     iwi_stop_master(struct iwi_softc *);
 178 static int      iwi_reset(struct iwi_softc *);
 179 static int      iwi_load_ucode(struct iwi_softc *, const struct iwi_fw *);
 180 static int      iwi_load_firmware(struct iwi_softc *, const struct iwi_fw *);
 181 static void     iwi_release_fw_dma(struct iwi_softc *sc);
 182 static int      iwi_config(struct iwi_softc *);
 183 static int      iwi_get_firmware(struct iwi_softc *, enum ieee80211_opmode);
 184 static void     iwi_put_firmware(struct iwi_softc *);
 185 static void     iwi_monitor_scan(void *, int);
 186 static int      iwi_scanchan(struct iwi_softc *, unsigned long, int);
 187 static void     iwi_scan_start(struct ieee80211com *);
 188 static void     iwi_scan_end(struct ieee80211com *);
 189 static void     iwi_set_channel(struct ieee80211com *);
 190 static void     iwi_scan_curchan(struct ieee80211_scan_state *, unsigned long maxdwell);
 191 static void     iwi_scan_mindwell(struct ieee80211_scan_state *);
 192 static int      iwi_auth_and_assoc(struct iwi_softc *, struct ieee80211vap *);
 193 static void     iwi_disassoc(void *, int);
 194 static int      iwi_disassociate(struct iwi_softc *, int quiet);
 195 static void     iwi_init_locked(struct iwi_softc *);
 196 static void     iwi_init(void *);
 197 static int      iwi_init_fw_dma(struct iwi_softc *, int);
 198 static void     iwi_stop_locked(void *);
 199 static void     iwi_stop(struct iwi_softc *);
 200 static void     iwi_restart(void *, int);
 201 static int      iwi_getrfkill(struct iwi_softc *);
 202 static void     iwi_radio_on(void *, int);
 203 static void     iwi_radio_off(void *, int);
 204 static void     iwi_sysctlattach(struct iwi_softc *);
 205 static void     iwi_led_event(struct iwi_softc *, int);
 206 static void     iwi_ledattach(struct iwi_softc *);
 207
 208 static int iwi_probe(device_t);
 209 static int iwi_attach(device_t);
 210 static int iwi_detach(device_t);
 211 static int iwi_shutdown(device_t);
 212 static int iwi_suspend(device_t);
 213 static int iwi_resume(device_t);
 214
 215 static device_method_t iwi_methods[] = {
 216         /* Device interface */
 217         DEVMETHOD(device_probe,         iwi_probe),
 218         DEVMETHOD(device_attach,        iwi_attach),
 219         DEVMETHOD(device_detach,        iwi_detach),
 220         DEVMETHOD(device_shutdown,      iwi_shutdown),
 221         DEVMETHOD(device_suspend,       iwi_suspend),
 222         DEVMETHOD(device_resume,        iwi_resume),
 223
 224         DEVMETHOD_END
 225 };
 226
 227 static driver_t iwi_driver = {
 228         "iwi",
 229         iwi_methods,
 230         sizeof (struct iwi_softc)
 231 };
 232
 233 static devclass_t iwi_devclass;
 234
 235 DRIVER_MODULE(iwi, pci, iwi_driver, iwi_devclass, NULL, NULL);
 236
 237 MODULE_VERSION(iwi, 1);
 238
 239 static __inline uint8_t
 240 MEM_READ_1(struct iwi_softc *sc, uint32_t addr)
 241 {
 242         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 243         return CSR_READ_1(sc, IWI_CSR_INDIRECT_DATA);
 244 }
 245
 246 static __inline uint32_t
 247 MEM_READ_4(struct iwi_softc *sc, uint32_t addr)
 248 {
 249         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 250         return CSR_READ_4(sc, IWI_CSR_INDIRECT_DATA);
 251 }
 252
 253 static int
 254 iwi_probe(device_t dev)
 255 {
 256         const struct iwi_ident *ident;
 257
 258         for (ident = iwi_ident_table; ident->name != NULL; ident++) {
 259                 if (pci_get_vendor(dev) == ident->vendor &&
 260                     pci_get_device(dev) == ident->device) {
 261                         device_set_desc(dev, ident->name);
 262                         return (BUS_PROBE_DEFAULT);
 263                 }
 264         }
 265         return ENXIO;
 266 }
 267
 268 static int
 269 iwi_attach(device_t dev)
 270 {
 271         struct iwi_softc *sc = device_get_softc(dev);
 272         struct ifnet *ifp;
 273         struct ieee80211com *ic;
 274         uint16_t val;
 275         int i, error;
 276         uint8_t bands;
 277         uint8_t macaddr[IEEE80211_ADDR_LEN];
 278
 279         sc->sc_dev = dev;
 280
 281         ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211);
 282         if (ifp == NULL) {
 283                 device_printf(dev, "can not if_alloc()\n");
 284                 return ENXIO;
 285         }
 286         ic = ifp->if_l2com;
 287
 288         IWI_LOCK_INIT(sc);
 289
 290         sc->sc_unr = new_unrhdr(1, IWI_MAX_IBSSNODE-1, &sc->sc_mtx);
 291
 292         TASK_INIT(&sc->sc_radiontask, 0, iwi_radio_on, sc);
 293         TASK_INIT(&sc->sc_radiofftask, 0, iwi_radio_off, sc);
 294         TASK_INIT(&sc->sc_restarttask, 0, iwi_restart, sc);
 295         TASK_INIT(&sc->sc_disassoctask, 0, iwi_disassoc, sc);
 296         TASK_INIT(&sc->sc_wmetask, 0, iwi_update_wme, sc);
 297         TASK_INIT(&sc->sc_monitortask, 0, iwi_monitor_scan, sc);
 298
 299         callout_init_mtx(&sc->sc_wdtimer, &sc->sc_mtx, 0);
 300         callout_init_mtx(&sc->sc_rftimer, &sc->sc_mtx, 0);
 301
 302         pci_write_config(dev, 0x41, 0, 1);
 303
 304         /* enable bus-mastering */
 305         pci_enable_busmaster(dev);
 306
 307         i = PCIR_BAR(0);
 308         sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i, RF_ACTIVE);
 309         if (sc->mem == NULL) {
 310                 device_printf(dev, "could not allocate memory resource\n");
 311                 goto fail;
 312         }
 313
 314         sc->sc_st = rman_get_bustag(sc->mem);
 315         sc->sc_sh = rman_get_bushandle(sc->mem);
 316
 317         i = 0;
 318         sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i,
 319             RF_ACTIVE | RF_SHAREABLE);
 320         if (sc->irq == NULL) {
 321                 device_printf(dev, "could not allocate interrupt resource\n");
 322                 goto fail;
 323         }
 324
 325         if (iwi_reset(sc) != 0) {
 326                 device_printf(dev, "could not reset adapter\n");
 327                 goto fail;
 328         }
 329
 330         /*
 331          * Allocate rings.
 332          */
 333         if (iwi_alloc_cmd_ring(sc, &sc->cmdq, IWI_CMD_RING_COUNT) != 0) {
 334                 device_printf(dev, "could not allocate Cmd ring\n");
 335                 goto fail;
 336         }
 337
 338         for (i = 0; i < 4; i++) {
 339                 error = iwi_alloc_tx_ring(sc, &sc->txq[i], IWI_TX_RING_COUNT,
 340                     IWI_CSR_TX1_RIDX + i * 4,
 341                     IWI_CSR_TX1_WIDX + i * 4);
 342                 if (error != 0) {
 343                         device_printf(dev, "could not allocate Tx ring %d\n",
 344                                 i+i);
 345                         goto fail;
 346                 }
 347         }
 348
 349         if (iwi_alloc_rx_ring(sc, &sc->rxq, IWI_RX_RING_COUNT) != 0) {
 350                 device_printf(dev, "could not allocate Rx ring\n");
 351                 goto fail;
 352         }
 353
 354         iwi_wme_init(sc);
 355
 356         ifp->if_softc = sc;
 357         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 358         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
 359         ifp->if_init = iwi_init;
 360         ifp->if_ioctl = iwi_ioctl;
 361         ifp->if_start = iwi_start;
 362         IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
 363         ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
 364         IFQ_SET_READY(&ifp->if_snd);
 365
 366         ic->ic_ifp = ifp;
 367         ic->ic_opmode = IEEE80211_M_STA;
 368         ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
 369
 370         /* set device capabilities */
 371         ic->ic_caps =
 372               IEEE80211_C_STA           /* station mode supported */
 373             | IEEE80211_C_IBSS          /* IBSS mode supported */
 374             | IEEE80211_C_MONITOR       /* monitor mode supported */
 375             | IEEE80211_C_PMGT          /* power save supported */
 376             | IEEE80211_C_SHPREAMBLE    /* short preamble supported */
 377             | IEEE80211_C_WPA           /* 802.11i */
 378             | IEEE80211_C_WME           /* 802.11e */
 379 #if 0
 380             | IEEE80211_C_BGSCAN        /* capable of bg scanning */
 381 #endif
 382             ;
 383
 384         /* read MAC address from EEPROM */
 385         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 0);
 386         macaddr[0] = val & 0xff;
 387         macaddr[1] = val >> 8;
 388         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 1);
 389         macaddr[2] = val & 0xff;
 390         macaddr[3] = val >> 8;
 391         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 2);
 392         macaddr[4] = val & 0xff;
 393         macaddr[5] = val >> 8;
 394
 395         bands = 0;
 396         setbit(&bands, IEEE80211_MODE_11B);
 397         setbit(&bands, IEEE80211_MODE_11G);
 398         if (pci_get_device(dev) >= 0x4223)
 399                 setbit(&bands, IEEE80211_MODE_11A);
 400         ieee80211_init_channels(ic, NULL, &bands);
 401
 402         ieee80211_ifattach(ic, macaddr);
 403         /* override default methods */
 404         ic->ic_node_alloc = iwi_node_alloc;
 405         sc->sc_node_free = ic->ic_node_free;
 406         ic->ic_node_free = iwi_node_free;
 407         ic->ic_raw_xmit = iwi_raw_xmit;
 408         ic->ic_scan_start = iwi_scan_start;
 409         ic->ic_scan_end = iwi_scan_end;
 410         ic->ic_set_channel = iwi_set_channel;
 411         ic->ic_scan_curchan = iwi_scan_curchan;
 412         ic->ic_scan_mindwell = iwi_scan_mindwell;
 413         ic->ic_wme.wme_update = iwi_wme_update;
 414
 415         ic->ic_vap_create = iwi_vap_create;
 416         ic->ic_vap_delete = iwi_vap_delete;
 417
 418         ieee80211_radiotap_attach(ic,
 419             &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
 420                 IWI_TX_RADIOTAP_PRESENT,
 421             &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
 422                 IWI_RX_RADIOTAP_PRESENT);
 423
 424         iwi_sysctlattach(sc);
 425         iwi_ledattach(sc);
 426
 427         /*
 428          * Hook our interrupt after all initialization is complete.
 429          */
 430         error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE,
 431             NULL, iwi_intr, sc, &sc->sc_ih);
 432         if (error != 0) {
 433                 device_printf(dev, "could not set up interrupt\n");
 434                 goto fail;
 435         }
 436
 437         if (bootverbose)
 438                 ieee80211_announce(ic);
 439
 440         return 0;
 441 fail:
 442         /* XXX fix */
 443         iwi_detach(dev);
 444         return ENXIO;
 445 }
 446
 447 static int
 448 iwi_detach(device_t dev)
 449 {
 450         struct iwi_softc *sc = device_get_softc(dev);
 451         struct ifnet *ifp = sc->sc_ifp;
 452         struct ieee80211com *ic = ifp->if_l2com;
 453
 454         bus_teardown_intr(dev, sc->irq, sc->sc_ih);
 455
 456         /* NB: do early to drain any pending tasks */
 457         ieee80211_draintask(ic, &sc->sc_radiontask);
 458         ieee80211_draintask(ic, &sc->sc_radiofftask);
 459         ieee80211_draintask(ic, &sc->sc_restarttask);
 460         ieee80211_draintask(ic, &sc->sc_disassoctask);
 461         ieee80211_draintask(ic, &sc->sc_monitortask);
 462
 463         iwi_stop(sc);
 464
 465         ieee80211_ifdetach(ic);
 466
 467         iwi_put_firmware(sc);
 468         iwi_release_fw_dma(sc);
 469
 470         iwi_free_cmd_ring(sc, &sc->cmdq);
 471         iwi_free_tx_ring(sc, &sc->txq[0]);
 472         iwi_free_tx_ring(sc, &sc->txq[1]);
 473         iwi_free_tx_ring(sc, &sc->txq[2]);
 474         iwi_free_tx_ring(sc, &sc->txq[3]);
 475         iwi_free_rx_ring(sc, &sc->rxq);
 476
 477         bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq), sc->irq);
 478
 479         bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(sc->mem),
 480             sc->mem);
 481
 482         delete_unrhdr(sc->sc_unr);
 483
 484         IWI_LOCK_DESTROY(sc);
 485
 486         if_free(ifp);
 487
 488         return 0;
 489 }
 490
 491 static struct ieee80211vap *
 492 iwi_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
 493     enum ieee80211_opmode opmode, int flags,
 494     const uint8_t bssid[IEEE80211_ADDR_LEN],
 495     const uint8_t mac[IEEE80211_ADDR_LEN])
 496 {
 497         struct ifnet *ifp = ic->ic_ifp;
 498         struct iwi_softc *sc = ifp->if_softc;
 499         struct iwi_vap *ivp;
 500         struct ieee80211vap *vap;
 501         int i;
 502
 503         if (!TAILQ_EMPTY(&ic->ic_vaps))         /* only one at a time */
 504                 return NULL;
 505         /*
 506          * Get firmware image (and possibly dma memory) on mode change.
 507          */
 508         if (iwi_get_firmware(sc, opmode))
 509                 return NULL;
 510         /* allocate DMA memory for mapping firmware image */
 511         i = sc->fw_fw.size;
 512         if (sc->fw_boot.size > i)
 513                 i = sc->fw_boot.size;
 514         /* XXX do we dma the ucode as well ? */
 515         if (sc->fw_uc.size > i)
 516                 i = sc->fw_uc.size;
 517         if (iwi_init_fw_dma(sc, i))
 518                 return NULL;
 519
 520         ivp = (struct iwi_vap *) malloc(sizeof(struct iwi_vap),
 521             M_80211_VAP, M_NOWAIT | M_ZERO);
 522         if (ivp == NULL)
 523                 return NULL;
 524         vap = &ivp->iwi_vap;
 525         ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
 526         /* override the default, the setting comes from the linux driver */
 527         vap->iv_bmissthreshold = 24;
 528         /* override with driver methods */
 529         ivp->iwi_newstate = vap->iv_newstate;
 530         vap->iv_newstate = iwi_newstate;
 531
 532         /* complete setup */
 533         ieee80211_vap_attach(vap, ieee80211_media_change, iwi_media_status);
 534         ic->ic_opmode = opmode;
 535         return vap;
 536 }
 537
 538 static void
 539 iwi_vap_delete(struct ieee80211vap *vap)
 540 {
 541         struct iwi_vap *ivp = IWI_VAP(vap);
 542
 543         ieee80211_vap_detach(vap);
 544         free(ivp, M_80211_VAP);
 545 }
 546
 547 static void
 548 iwi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 549 {
 550         if (error != 0)
 551                 return;
 552
 553         KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
 554
 555         *(bus_addr_t *)arg = segs[0].ds_addr;
 556 }
 557
 558 static int
 559 iwi_alloc_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring, int count)
 560 {
 561         int error;
 562
 563         ring->count = count;
 564         ring->queued = 0;
 565         ring->cur = ring->next = 0;
 566
 567         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
 568             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 569             count * IWI_CMD_DESC_SIZE, 1, count * IWI_CMD_DESC_SIZE, 0,
 570             NULL, NULL, &ring->desc_dmat);
 571         if (error != 0) {
 572                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 573                 goto fail;
 574         }
 575
 576         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 577             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 578         if (error != 0) {
 579                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 580                 goto fail;
 581         }
 582
 583         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 584             count * IWI_CMD_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 585         if (error != 0) {
 586                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 587                 goto fail;
 588         }
 589
 590         return 0;
 591
 592 fail:   iwi_free_cmd_ring(sc, ring);
 593         return error;
 594 }
 595
 596 static void
 597 iwi_reset_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 598 {
 599         ring->queued = 0;
 600         ring->cur = ring->next = 0;
 601 }
 602
 603 static void
 604 iwi_free_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 605 {
 606         if (ring->desc != NULL) {
 607                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 608                     BUS_DMASYNC_POSTWRITE);
 609                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 610                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 611         }
 612
 613         if (ring->desc_dmat != NULL)
 614                 bus_dma_tag_destroy(ring->desc_dmat);
 615 }
 616
 617 static int
 618 iwi_alloc_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring, int count,
 619     bus_addr_t csr_ridx, bus_addr_t csr_widx)
 620 {
 621         int i, error;
 622
 623         ring->count = count;
 624         ring->queued = 0;
 625         ring->cur = ring->next = 0;
 626         ring->csr_ridx = csr_ridx;
 627         ring->csr_widx = csr_widx;
 628
 629         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
 630             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 631             count * IWI_TX_DESC_SIZE, 1, count * IWI_TX_DESC_SIZE, 0, NULL,
 632             NULL, &ring->desc_dmat);
 633         if (error != 0) {
 634                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 635                 goto fail;
 636         }
 637
 638         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 639             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 640         if (error != 0) {
 641                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 642                 goto fail;
 643         }
 644
 645         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 646             count * IWI_TX_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 647         if (error != 0) {
 648                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 649                 goto fail;
 650         }
 651
 652         ring->data = malloc(count * sizeof (struct iwi_tx_data), M_DEVBUF,
 653             M_NOWAIT | M_ZERO);
 654         if (ring->data == NULL) {
 655                 device_printf(sc->sc_dev, "could not allocate soft data\n");
 656                 error = ENOMEM;
 657                 goto fail;
 658         }
 659
 660         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
 661         BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
 662         IWI_MAX_NSEG, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
 663         if (error != 0) {
 664                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 665                 goto fail;
 666         }
 667
 668         for (i = 0; i < count; i++) {
 669                 error = bus_dmamap_create(ring->data_dmat, 0,
 670                     &ring->data[i].map);
 671                 if (error != 0) {
 672                         device_printf(sc->sc_dev, "could not create DMA map\n");
 673                         goto fail;
 674                 }
 675         }
 676
 677         return 0;
 678
 679 fail:   iwi_free_tx_ring(sc, ring);
 680         return error;
 681 }
 682
 683 static void
 684 iwi_reset_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 685 {
 686         struct iwi_tx_data *data;
 687         int i;
 688
 689         for (i = 0; i < ring->count; i++) {
 690                 data = &ring->data[i];
 691
 692                 if (data->m != NULL) {
 693                         bus_dmamap_sync(ring->data_dmat, data->map,
 694                             BUS_DMASYNC_POSTWRITE);
 695                         bus_dmamap_unload(ring->data_dmat, data->map);
 696                         m_freem(data->m);
 697                         data->m = NULL;
 698                 }
 699
 700                 if (data->ni != NULL) {
 701                         ieee80211_free_node(data->ni);
 702                         data->ni = NULL;
 703                 }
 704         }
 705
 706         ring->queued = 0;
 707         ring->cur = ring->next = 0;
 708 }
 709
 710 static void
 711 iwi_free_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 712 {
 713         struct iwi_tx_data *data;
 714         int i;
 715
 716         if (ring->desc != NULL) {
 717                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 718                     BUS_DMASYNC_POSTWRITE);
 719                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 720                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 721         }
 722
 723         if (ring->desc_dmat != NULL)
 724                 bus_dma_tag_destroy(ring->desc_dmat);
 725
 726         if (ring->data != NULL) {
 727                 for (i = 0; i < ring->count; i++) {
 728                         data = &ring->data[i];
 729
 730                         if (data->m != NULL) {
 731                                 bus_dmamap_sync(ring->data_dmat, data->map,
 732                                     BUS_DMASYNC_POSTWRITE);
 733                                 bus_dmamap_unload(ring->data_dmat, data->map);
 734                                 m_freem(data->m);
 735                         }
 736
 737                         if (data->ni != NULL)
 738                                 ieee80211_free_node(data->ni);
 739
 740                         if (data->map != NULL)
 741                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 742                 }
 743
 744                 free(ring->data, M_DEVBUF);
 745         }
 746
 747         if (ring->data_dmat != NULL)
 748                 bus_dma_tag_destroy(ring->data_dmat);
 749 }
 750
 751 static int
 752 iwi_alloc_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring, int count)
 753 {
 754         struct iwi_rx_data *data;
 755         int i, error;
 756
 757         ring->count = count;
 758         ring->cur = 0;
 759
 760         ring->data = malloc(count * sizeof (struct iwi_rx_data), M_DEVBUF,
 761             M_NOWAIT | M_ZERO);
 762         if (ring->data == NULL) {
 763                 device_printf(sc->sc_dev, "could not allocate soft data\n");
 764                 error = ENOMEM;
 765                 goto fail;
 766         }
 767
 768         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
 769             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
 770             1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
 771         if (error != 0) {
 772                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 773                 goto fail;
 774         }
 775
 776         for (i = 0; i < count; i++) {
 777                 data = &ring->data[i];
 778
 779                 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
 780                 if (error != 0) {
 781                         device_printf(sc->sc_dev, "could not create DMA map\n");
 782                         goto fail;
 783                 }
 784
 785                 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
 786                 if (data->m == NULL) {
 787                         device_printf(sc->sc_dev,
 788                             "could not allocate rx mbuf\n");
 789                         error = ENOMEM;
 790                         goto fail;
 791                 }
 792
 793                 error = bus_dmamap_load(ring->data_dmat, data->map,
 794                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
 795                     &data->physaddr, 0);
 796                 if (error != 0) {
 797                         device_printf(sc->sc_dev,
 798                             "could not load rx buf DMA map");
 799                         goto fail;
 800                 }
 801
 802                 data->reg = IWI_CSR_RX_BASE + i * 4;
 803         }
 804
 805         return 0;
 806
 807 fail:   iwi_free_rx_ring(sc, ring);
 808         return error;
 809 }
 810
 811 static void
 812 iwi_reset_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 813 {
 814         ring->cur = 0;
 815 }
 816
 817 static void
 818 iwi_free_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 819 {
 820         struct iwi_rx_data *data;
 821         int i;
 822
 823         if (ring->data != NULL) {
 824                 for (i = 0; i < ring->count; i++) {
 825                         data = &ring->data[i];
 826
 827                         if (data->m != NULL) {
 828                                 bus_dmamap_sync(ring->data_dmat, data->map,
 829                                     BUS_DMASYNC_POSTREAD);
 830                                 bus_dmamap_unload(ring->data_dmat, data->map);
 831                                 m_freem(data->m);
 832                         }
 833
 834                         if (data->map != NULL)
 835                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 836                 }
 837
 838                 free(ring->data, M_DEVBUF);
 839         }
 840
 841         if (ring->data_dmat != NULL)
 842                 bus_dma_tag_destroy(ring->data_dmat);
 843 }
 844
 845 static int
 846 iwi_shutdown(device_t dev)
 847 {
 848         struct iwi_softc *sc = device_get_softc(dev);
 849
 850         iwi_stop(sc);
 851         iwi_put_firmware(sc);           /* ??? XXX */
 852
 853         return 0;
 854 }
 855
 856 static int
 857 iwi_suspend(device_t dev)
 858 {
 859         struct iwi_softc *sc = device_get_softc(dev);
 860         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
 861
 862         ieee80211_suspend_all(ic);
 863         return 0;
 864 }
 865
 866 static int
 867 iwi_resume(device_t dev)
 868 {
 869         struct iwi_softc *sc = device_get_softc(dev);
 870         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
 871
 872         pci_write_config(dev, 0x41, 0, 1);
 873
 874         ieee80211_resume_all(ic);
 875         return 0;
 876 }
 877
 878 static struct ieee80211_node *
 879 iwi_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN])
 880 {
 881         struct iwi_node *in;
 882
 883         in = malloc(sizeof (struct iwi_node), M_80211_NODE, M_NOWAIT | M_ZERO);
 884         if (in == NULL)
 885                 return NULL;
 886         /* XXX assign sta table entry for adhoc */
 887         in->in_station = -1;
 888
 889         return &in->in_node;
 890 }
 891
 892 static void
 893 iwi_node_free(struct ieee80211_node *ni)
 894 {
 895         struct ieee80211com *ic = ni->ni_ic;
 896         struct iwi_softc *sc = ic->ic_ifp->if_softc;
 897         struct iwi_node *in = (struct iwi_node *)ni;
 898
 899         if (in->in_station != -1) {
 900                 DPRINTF(("%s mac %6D station %u\n", __func__,
 901                     ni->ni_macaddr, ":", in->in_station));
 902                 free_unr(sc->sc_unr, in->in_station);
 903         }
 904
 905         sc->sc_node_free(ni);
 906 }
 907
 908 /*
 909  * Convert h/w rate code to IEEE rate code.
 910  */
 911 static int
 912 iwi_cvtrate(int iwirate)
 913 {
 914         switch (iwirate) {
 915         case IWI_RATE_DS1:      return 2;
 916         case IWI_RATE_DS2:      return 4;
 917         case IWI_RATE_DS5:      return 11;
 918         case IWI_RATE_DS11:     return 22;
 919         case IWI_RATE_OFDM6:    return 12;
 920         case IWI_RATE_OFDM9:    return 18;
 921         case IWI_RATE_OFDM12:   return 24;
 922         case IWI_RATE_OFDM18:   return 36;
 923         case IWI_RATE_OFDM24:   return 48;
 924         case IWI_RATE_OFDM36:   return 72;
 925         case IWI_RATE_OFDM48:   return 96;
 926         case IWI_RATE_OFDM54:   return 108;
 927         }
 928         return 0;
 929 }
 930
 931 /*
 932  * The firmware automatically adapts the transmit speed.  We report its current
 933  * value here.
 934  */
 935 static void
 936 iwi_media_status(struct ifnet *ifp, struct ifmediareq *imr)
 937 {
 938         struct ieee80211vap *vap = ifp->if_softc;
 939         struct ieee80211com *ic = vap->iv_ic;
 940         struct iwi_softc *sc = ic->ic_ifp->if_softc;
 941         struct ieee80211_node *ni;
 942
 943         /* read current transmission rate from adapter */
 944         ni = ieee80211_ref_node(vap->iv_bss);
 945         ni->ni_txrate =
 946             iwi_cvtrate(CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE));
 947         ieee80211_free_node(ni);
 948         ieee80211_media_status(ifp, imr);
 949 }
 950
 951 static int
 952 iwi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 953 {
 954         struct iwi_vap *ivp = IWI_VAP(vap);
 955         struct ieee80211com *ic = vap->iv_ic;
 956         struct ifnet *ifp = ic->ic_ifp;
 957         struct iwi_softc *sc = ifp->if_softc;
 958         IWI_LOCK_DECL;
 959
 960         DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__,
 961                 ieee80211_state_name[vap->iv_state],
 962                 ieee80211_state_name[nstate], sc->flags));
 963
 964         IEEE80211_UNLOCK(ic);
 965         IWI_LOCK(sc);
 966         switch (nstate) {
 967         case IEEE80211_S_INIT:
 968                 /*
 969                  * NB: don't try to do this if iwi_stop_master has
 970                  *     shutdown the firmware and disabled interrupts.
 971                  */
 972                 if (vap->iv_state == IEEE80211_S_RUN &&
 973                     (sc->flags & IWI_FLAG_FW_INITED))
 974                         iwi_disassociate(sc, 0);
 975                 break;
 976         case IEEE80211_S_AUTH:
 977                 iwi_auth_and_assoc(sc, vap);
 978                 break;
 979         case IEEE80211_S_RUN:
 980                 if (vap->iv_opmode == IEEE80211_M_IBSS &&
 981                     vap->iv_state == IEEE80211_S_SCAN) {
 982                         /*
 983                          * XXX when joining an ibss network we are called
 984                          * with a SCAN -> RUN transition on scan complete.
 985                          * Use that to call iwi_auth_and_assoc.  On completing
 986                          * the join we are then called again with an
 987                          * AUTH -> RUN transition and we want to do nothing.
 988                          * This is all totally bogus and needs to be redone.
 989                          */
 990                         iwi_auth_and_assoc(sc, vap);
 991                 } else if (vap->iv_opmode == IEEE80211_M_MONITOR)
 992                         ieee80211_runtask(ic, &sc->sc_monitortask);
 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         IWI_UNLOCK(sc);
1008         IEEE80211_LOCK(ic);
1009         return ivp->iwi_newstate(vap, nstate, arg);
1010 }
1011
1012 /*
1013  * WME parameters coming from IEEE 802.11e specification.  These values are
1014  * already declared in ieee80211_proto.c, but they are static so they can't
1015  * be reused here.
1016  */
1017 static const struct wmeParams iwi_wme_cck_params[WME_NUM_AC] = {
1018         { 0, 3, 5,  7,   0 },   /* WME_AC_BE */
1019         { 0, 3, 5, 10,   0 },   /* WME_AC_BK */
1020         { 0, 2, 4,  5, 188 },   /* WME_AC_VI */
1021         { 0, 2, 3,  4, 102 }    /* WME_AC_VO */
1022 };
1023
1024 static const struct wmeParams iwi_wme_ofdm_params[WME_NUM_AC] = {
1025         { 0, 3, 4,  6,   0 },   /* WME_AC_BE */
1026         { 0, 3, 4, 10,   0 },   /* WME_AC_BK */
1027         { 0, 2, 3,  4,  94 },   /* WME_AC_VI */
1028         { 0, 2, 2,  3,  47 }    /* WME_AC_VO */
1029 };
1030 #define IWI_EXP2(v)     htole16((1 << (v)) - 1)
1031 #define IWI_USEC(v)     htole16(IEEE80211_TXOP_TO_US(v))
1032
1033 static void
1034 iwi_wme_init(struct iwi_softc *sc)
1035 {
1036         const struct wmeParams *wmep;
1037         int ac;
1038
1039         memset(sc->wme, 0, sizeof sc->wme);
1040         for (ac = 0; ac < WME_NUM_AC; ac++) {
1041                 /* set WME values for CCK modulation */
1042                 wmep = &iwi_wme_cck_params[ac];
1043                 sc->wme[1].aifsn[ac] = wmep->wmep_aifsn;
1044                 sc->wme[1].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1045                 sc->wme[1].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1046                 sc->wme[1].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1047                 sc->wme[1].acm[ac]   = wmep->wmep_acm;
1048
1049                 /* set WME values for OFDM modulation */
1050                 wmep = &iwi_wme_ofdm_params[ac];
1051                 sc->wme[2].aifsn[ac] = wmep->wmep_aifsn;
1052                 sc->wme[2].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1053                 sc->wme[2].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1054                 sc->wme[2].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1055                 sc->wme[2].acm[ac]   = wmep->wmep_acm;
1056         }
1057 }
1058
1059 static int
1060 iwi_wme_setparams(struct iwi_softc *sc, struct ieee80211com *ic)
1061 {
1062         const struct wmeParams *wmep;
1063         int ac;
1064
1065         for (ac = 0; ac < WME_NUM_AC; ac++) {
1066                 /* set WME values for current operating mode */
1067                 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac];
1068                 sc->wme[0].aifsn[ac] = wmep->wmep_aifsn;
1069                 sc->wme[0].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1070                 sc->wme[0].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1071                 sc->wme[0].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1072                 sc->wme[0].acm[ac]   = wmep->wmep_acm;
1073         }
1074
1075         DPRINTF(("Setting WME parameters\n"));
1076         return iwi_cmd(sc, IWI_CMD_SET_WME_PARAMS, sc->wme, sizeof sc->wme);
1077 }
1078 #undef IWI_USEC
1079 #undef IWI_EXP2
1080
1081 static void
1082 iwi_update_wme(void *arg, int npending)
1083 {
1084         struct ieee80211com *ic = arg;
1085         struct iwi_softc *sc = ic->ic_ifp->if_softc;
1086         IWI_LOCK_DECL;
1087
1088         IWI_LOCK(sc);
1089         (void) iwi_wme_setparams(sc, ic);
1090         IWI_UNLOCK(sc);
1091 }
1092
1093 static int
1094 iwi_wme_update(struct ieee80211com *ic)
1095 {
1096         struct iwi_softc *sc = ic->ic_ifp->if_softc;
1097         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1098
1099         /*
1100          * We may be called to update the WME parameters in
1101          * the adapter at various places.  If we're already
1102          * associated then initiate the request immediately;
1103          * otherwise we assume the params will get sent down
1104          * to the adapter as part of the work iwi_auth_and_assoc
1105          * does.
1106          */
1107         if (vap->iv_state == IEEE80211_S_RUN)
1108                 ieee80211_runtask(ic, &sc->sc_wmetask);
1109         return (0);
1110 }
1111
1112 static int
1113 iwi_wme_setie(struct iwi_softc *sc)
1114 {
1115         struct ieee80211_wme_info wme;
1116
1117         memset(&wme, 0, sizeof wme);
1118         wme.wme_id = IEEE80211_ELEMID_VENDOR;
1119         wme.wme_len = sizeof (struct ieee80211_wme_info) - 2;
1120         wme.wme_oui[0] = 0x00;
1121         wme.wme_oui[1] = 0x50;
1122         wme.wme_oui[2] = 0xf2;
1123         wme.wme_type = WME_OUI_TYPE;
1124         wme.wme_subtype = WME_INFO_OUI_SUBTYPE;
1125         wme.wme_version = WME_VERSION;
1126         wme.wme_info = 0;
1127
1128         DPRINTF(("Setting WME IE (len=%u)\n", wme.wme_len));
1129         return iwi_cmd(sc, IWI_CMD_SET_WMEIE, &wme, sizeof wme);
1130 }
1131
1132 /*
1133  * Read 16 bits at address 'addr' from the serial EEPROM.
1134  */
1135 static uint16_t
1136 iwi_read_prom_word(struct iwi_softc *sc, uint8_t addr)
1137 {
1138         uint32_t tmp;
1139         uint16_t val;
1140         int n;
1141
1142         /* clock C once before the first command */
1143         IWI_EEPROM_CTL(sc, 0);
1144         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1145         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1146         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1147
1148         /* write start bit (1) */
1149         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1150         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1151
1152         /* write READ opcode (10) */
1153         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1154         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1155         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1156         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1157
1158         /* write address A7-A0 */
1159         for (n = 7; n >= 0; n--) {
1160                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1161                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D));
1162                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1163                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D) | IWI_EEPROM_C);
1164         }
1165
1166         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1167
1168         /* read data Q15-Q0 */
1169         val = 0;
1170         for (n = 15; n >= 0; n--) {
1171                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1172                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1173                 tmp = MEM_READ_4(sc, IWI_MEM_EEPROM_CTL);
1174                 val |= ((tmp & IWI_EEPROM_Q) >> IWI_EEPROM_SHIFT_Q) << n;
1175         }
1176
1177         IWI_EEPROM_CTL(sc, 0);
1178
1179         /* clear Chip Select and clock C */
1180         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1181         IWI_EEPROM_CTL(sc, 0);
1182         IWI_EEPROM_CTL(sc, IWI_EEPROM_C);
1183
1184         return val;
1185 }
1186
1187 static void
1188 iwi_setcurchan(struct iwi_softc *sc, int chan)
1189 {
1190         struct ifnet *ifp = sc->sc_ifp;
1191         struct ieee80211com *ic = ifp->if_l2com;
1192
1193         sc->curchan = chan;
1194         ieee80211_radiotap_chan_change(ic);
1195 }
1196
1197 static void
1198 iwi_frame_intr(struct iwi_softc *sc, struct iwi_rx_data *data, int i,
1199     struct iwi_frame *frame)
1200 {
1201         struct ifnet *ifp = sc->sc_ifp;
1202         struct ieee80211com *ic = ifp->if_l2com;
1203         struct mbuf *mnew, *m;
1204         struct ieee80211_node *ni;
1205         int type, error, framelen;
1206         int8_t rssi, nf;
1207         IWI_LOCK_DECL;
1208
1209         framelen = le16toh(frame->len);
1210         if (framelen < IEEE80211_MIN_LEN || framelen > MCLBYTES) {
1211                 /*
1212                  * XXX >MCLBYTES is bogus as it means the h/w dma'd
1213                  *     out of bounds; need to figure out how to limit
1214                  *     frame size in the firmware
1215                  */
1216                 /* XXX stat */
1217                 DPRINTFN(1,
1218                     ("drop rx frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1219                     le16toh(frame->len), frame->chan, frame->rssi,
1220                     frame->rssi_dbm));
1221                 return;
1222         }
1223
1224         DPRINTFN(5, ("received frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1225             le16toh(frame->len), frame->chan, frame->rssi, frame->rssi_dbm));
1226
1227         if (frame->chan != sc->curchan)
1228                 iwi_setcurchan(sc, frame->chan);
1229
1230         /*
1231          * Try to allocate a new mbuf for this ring element and load it before
1232          * processing the current mbuf. If the ring element cannot be loaded,
1233          * drop the received packet and reuse the old mbuf. In the unlikely
1234          * case that the old mbuf can't be reloaded either, explicitly panic.
1235          */
1236         mnew = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
1237         if (mnew == NULL) {
1238                 ifp->if_ierrors++;
1239                 return;
1240         }
1241
1242         bus_dmamap_unload(sc->rxq.data_dmat, data->map);
1243
1244         error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1245             mtod(mnew, void *), MCLBYTES, iwi_dma_map_addr, &data->physaddr,
1246             0);
1247         if (error != 0) {
1248                 m_freem(mnew);
1249
1250                 /* try to reload the old mbuf */
1251                 error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1252                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
1253                     &data->physaddr, 0);
1254                 if (error != 0) {
1255                         /* very unlikely that it will fail... */
1256                         panic("%s: could not load old rx mbuf",
1257                             device_get_name(sc->sc_dev));
1258                 }
1259                 ifp->if_ierrors++;
1260                 return;
1261         }
1262
1263         /*
1264          * New mbuf successfully loaded, update Rx ring and continue
1265          * processing.
1266          */
1267         m = data->m;
1268         data->m = mnew;
1269         CSR_WRITE_4(sc, data->reg, data->physaddr);
1270
1271         /* finalize mbuf */
1272         m->m_pkthdr.rcvif = ifp;
1273         m->m_pkthdr.len = m->m_len = sizeof (struct iwi_hdr) +
1274             sizeof (struct iwi_frame) + framelen;
1275
1276         m_adj(m, sizeof (struct iwi_hdr) + sizeof (struct iwi_frame));
1277
1278         rssi = frame->rssi_dbm;
1279         nf = -95;
1280         if (ieee80211_radiotap_active(ic)) {
1281                 struct iwi_rx_radiotap_header *tap = &sc->sc_rxtap;
1282
1283                 tap->wr_flags = 0;
1284                 tap->wr_antsignal = rssi;
1285                 tap->wr_antnoise = nf;
1286                 tap->wr_rate = iwi_cvtrate(frame->rate);
1287                 tap->wr_antenna = frame->antenna;
1288         }
1289         IWI_UNLOCK(sc);
1290
1291         ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *));
1292         if (ni != NULL) {
1293                 type = ieee80211_input(ni, m, rssi, nf);
1294                 ieee80211_free_node(ni);
1295         } else
1296                 type = ieee80211_input_all(ic, m, rssi, nf);
1297
1298         IWI_LOCK(sc);
1299         if (sc->sc_softled) {
1300                 /*
1301                  * Blink for any data frame.  Otherwise do a
1302                  * heartbeat-style blink when idle.  The latter
1303                  * is mainly for station mode where we depend on
1304                  * periodic beacon frames to trigger the poll event.
1305                  */
1306                 if (type == IEEE80211_FC0_TYPE_DATA) {
1307                         sc->sc_rxrate = frame->rate;
1308                         iwi_led_event(sc, IWI_LED_RX);
1309                 } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle)
1310                         iwi_led_event(sc, IWI_LED_POLL);
1311         }
1312 }
1313
1314 /*
1315  * Check for an association response frame to see if QoS
1316  * has been negotiated.  We parse just enough to figure
1317  * out if we're supposed to use QoS.  The proper solution
1318  * is to pass the frame up so ieee80211_input can do the
1319  * work but that's made hard by how things currently are
1320  * done in the driver.
1321  */
1322 static void
1323 iwi_checkforqos(struct ieee80211vap *vap,
1324         const struct ieee80211_frame *wh, int len)
1325 {
1326 #define SUBTYPE(wh)     ((wh)->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
1327         const uint8_t *frm, *efrm, *wme;
1328         struct ieee80211_node *ni;
1329         uint16_t capinfo, status, associd;
1330
1331         /* NB: +8 for capinfo, status, associd, and first ie */
1332         if (!(sizeof(*wh)+8 < len && len < IEEE80211_MAX_LEN) ||
1333             SUBTYPE(wh) != IEEE80211_FC0_SUBTYPE_ASSOC_RESP)
1334                 return;
1335         /*
1336          * asresp frame format
1337          *      [2] capability information
1338          *      [2] status
1339          *      [2] association ID
1340          *      [tlv] supported rates
1341          *      [tlv] extended supported rates
1342          *      [tlv] WME
1343          */
1344         frm = (const uint8_t *)&wh[1];
1345         efrm = ((const uint8_t *) wh) + len;
1346
1347         capinfo = le16toh(*(const uint16_t *)frm);
1348         frm += 2;
1349         status = le16toh(*(const uint16_t *)frm);
1350         frm += 2;
1351         associd = le16toh(*(const uint16_t *)frm);
1352         frm += 2;
1353
1354         wme = NULL;
1355         while (efrm - frm > 1) {
1356                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1357                 switch (*frm) {
1358                 case IEEE80211_ELEMID_VENDOR:
1359                         if (iswmeoui(frm))
1360                                 wme = frm;
1361                         break;
1362                 }
1363                 frm += frm[1] + 2;
1364         }
1365
1366         ni = ieee80211_ref_node(vap->iv_bss);
1367         ni->ni_capinfo = capinfo;
1368         ni->ni_associd = associd & 0x3fff;
1369         if (wme != NULL)
1370                 ni->ni_flags |= IEEE80211_NODE_QOS;
1371         else
1372                 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1373         ieee80211_free_node(ni);
1374 #undef SUBTYPE
1375 }
1376
1377 static void
1378 iwi_notif_link_quality(struct iwi_softc *sc, struct iwi_notif *notif)
1379 {
1380         struct iwi_notif_link_quality *lq;
1381         int len;
1382
1383         len = le16toh(notif->len);
1384
1385         DPRINTFN(5, ("Notification (%u) - len=%d, sizeof=%zu\n",
1386             notif->type,
1387             len,
1388             sizeof(struct iwi_notif_link_quality)
1389             ));
1390
1391         /* enforce length */
1392         if (len != sizeof(struct iwi_notif_link_quality)) {
1393                 DPRINTFN(5, ("Notification: (%u) too short (%d)\n",
1394                     notif->type,
1395                     len));
1396                 return;
1397         }
1398
1399         lq = (struct iwi_notif_link_quality *)(notif + 1);
1400         memcpy(&sc->sc_linkqual, lq, sizeof(sc->sc_linkqual));
1401         sc->sc_linkqual_valid = 1;
1402 }
1403
1404 /*
1405  * Task queue callbacks for iwi_notification_intr used to avoid LOR's.
1406  */
1407
1408 static void
1409 iwi_notification_intr(struct iwi_softc *sc, struct iwi_notif *notif)
1410 {
1411         struct ifnet *ifp = sc->sc_ifp;
1412         struct ieee80211com *ic = ifp->if_l2com;
1413         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1414         struct iwi_notif_scan_channel *chan;
1415         struct iwi_notif_scan_complete *scan;
1416         struct iwi_notif_authentication *auth;
1417         struct iwi_notif_association *assoc;
1418         struct iwi_notif_beacon_state *beacon;
1419
1420         switch (notif->type) {
1421         case IWI_NOTIF_TYPE_SCAN_CHANNEL:
1422                 chan = (struct iwi_notif_scan_channel *)(notif + 1);
1423
1424                 DPRINTFN(3, ("Scan of channel %u complete (%u)\n",
1425                     ieee80211_ieee2mhz(chan->nchan, 0), chan->nchan));
1426
1427                 /* Reset the timer, the scan is still going */
1428                 sc->sc_state_timer = 3;
1429                 break;
1430
1431         case IWI_NOTIF_TYPE_SCAN_COMPLETE:
1432                 scan = (struct iwi_notif_scan_complete *)(notif + 1);
1433
1434                 DPRINTFN(2, ("Scan completed (%u, %u)\n", scan->nchan,
1435                     scan->status));
1436
1437                 IWI_STATE_END(sc, IWI_FW_SCANNING);
1438
1439                 /*
1440                  * Monitor mode works by doing a passive scan to set
1441                  * the channel and enable rx.  Because we don't want
1442                  * to abort a scan lest the firmware crash we scan
1443                  * for a short period of time and automatically restart
1444                  * the scan when notified the sweep has completed.
1445                  */
1446                 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
1447                         ieee80211_runtask(ic, &sc->sc_monitortask);
1448                         break;
1449                 }
1450
1451                 if (scan->status == IWI_SCAN_COMPLETED) {
1452                         /* NB: don't need to defer, net80211 does it for us */
1453                         ieee80211_scan_next(vap);
1454                 }
1455                 break;
1456
1457         case IWI_NOTIF_TYPE_AUTHENTICATION:
1458                 auth = (struct iwi_notif_authentication *)(notif + 1);
1459                 switch (auth->state) {
1460                 case IWI_AUTH_SUCCESS:
1461                         DPRINTFN(2, ("Authentication succeeeded\n"));
1462                         ieee80211_new_state(vap, IEEE80211_S_ASSOC, -1);
1463                         break;
1464                 case IWI_AUTH_FAIL:
1465                         /*
1466                          * These are delivered as an unsolicited deauth
1467                          * (e.g. due to inactivity) or in response to an
1468                          * associate request.
1469                          */
1470                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1471                         if (vap->iv_state != IEEE80211_S_RUN) {
1472                                 DPRINTFN(2, ("Authentication failed\n"));
1473                                 vap->iv_stats.is_rx_auth_fail++;
1474                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1475                         } else {
1476                                 DPRINTFN(2, ("Deauthenticated\n"));
1477                                 vap->iv_stats.is_rx_deauth++;
1478                         }
1479                         ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1480                         break;
1481                 case IWI_AUTH_SENT_1:
1482                 case IWI_AUTH_RECV_2:
1483                 case IWI_AUTH_SEQ1_PASS:
1484                         break;
1485                 case IWI_AUTH_SEQ1_FAIL:
1486                         DPRINTFN(2, ("Initial authentication handshake failed; "
1487                                 "you probably need shared key\n"));
1488                         vap->iv_stats.is_rx_auth_fail++;
1489                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1490                         /* XXX retry shared key when in auto */
1491                         break;
1492                 default:
1493                         device_printf(sc->sc_dev,
1494                             "unknown authentication state %u\n", auth->state);
1495                         break;
1496                 }
1497                 break;
1498
1499         case IWI_NOTIF_TYPE_ASSOCIATION:
1500                 assoc = (struct iwi_notif_association *)(notif + 1);
1501                 switch (assoc->state) {
1502                 case IWI_AUTH_SUCCESS:
1503                         /* re-association, do nothing */
1504                         break;
1505                 case IWI_ASSOC_SUCCESS:
1506                         DPRINTFN(2, ("Association succeeded\n"));
1507                         sc->flags |= IWI_FLAG_ASSOCIATED;
1508                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1509                         iwi_checkforqos(vap,
1510                             (const struct ieee80211_frame *)(assoc+1),
1511                             le16toh(notif->len) - sizeof(*assoc) - 1);
1512                         ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
1513                         break;
1514                 case IWI_ASSOC_INIT:
1515                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1516                         switch (sc->fw_state) {
1517                         case IWI_FW_ASSOCIATING:
1518                                 DPRINTFN(2, ("Association failed\n"));
1519                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1520                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1521                                 break;
1522
1523                         case IWI_FW_DISASSOCIATING:
1524                                 DPRINTFN(2, ("Dissassociated\n"));
1525                                 IWI_STATE_END(sc, IWI_FW_DISASSOCIATING);
1526                                 vap->iv_stats.is_rx_disassoc++;
1527                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1528                                 break;
1529                         }
1530                         break;
1531                 default:
1532                         device_printf(sc->sc_dev,
1533                             "unknown association state %u\n", assoc->state);
1534                         break;
1535                 }
1536                 break;
1537
1538         case IWI_NOTIF_TYPE_BEACON:
1539                 /* XXX check struct length */
1540                 beacon = (struct iwi_notif_beacon_state *)(notif + 1);
1541
1542                 DPRINTFN(5, ("Beacon state (%u, %u)\n",
1543                     beacon->state, le32toh(beacon->number)));
1544
1545                 if (beacon->state == IWI_BEACON_MISS) {
1546                         /*
1547                          * The firmware notifies us of every beacon miss
1548                          * so we need to track the count against the
1549                          * configured threshold before notifying the
1550                          * 802.11 layer.
1551                          * XXX try to roam, drop assoc only on much higher count
1552                          */
1553                         if (le32toh(beacon->number) >= vap->iv_bmissthreshold) {
1554                                 DPRINTF(("Beacon miss: %u >= %u\n",
1555                                     le32toh(beacon->number),
1556                                     vap->iv_bmissthreshold));
1557                                 vap->iv_stats.is_beacon_miss++;
1558                                 /*
1559                                  * It's pointless to notify the 802.11 layer
1560                                  * as it'll try to send a probe request (which
1561                                  * we'll discard) and then timeout and drop us
1562                                  * into scan state.  Instead tell the firmware
1563                                  * to disassociate and then on completion we'll
1564                                  * kick the state machine to scan.
1565                                  */
1566                                 ieee80211_runtask(ic, &sc->sc_disassoctask);
1567                         }
1568                 }
1569                 break;
1570
1571         case IWI_NOTIF_TYPE_CALIBRATION:
1572         case IWI_NOTIF_TYPE_NOISE:
1573                 /* XXX handle? */
1574                 DPRINTFN(5, ("Notification (%u)\n", notif->type));
1575                 break;
1576         case IWI_NOTIF_TYPE_LINK_QUALITY:
1577                 iwi_notif_link_quality(sc, notif);
1578                 break;
1579
1580         default:
1581                 DPRINTF(("unknown notification type %u flags 0x%x len %u\n",
1582                     notif->type, notif->flags, le16toh(notif->len)));
1583                 break;
1584         }
1585 }
1586
1587 static void
1588 iwi_rx_intr(struct iwi_softc *sc)
1589 {
1590         struct iwi_rx_data *data;
1591         struct iwi_hdr *hdr;
1592         uint32_t hw;
1593
1594         hw = CSR_READ_4(sc, IWI_CSR_RX_RIDX);
1595
1596         for (; sc->rxq.cur != hw;) {
1597                 data = &sc->rxq.data[sc->rxq.cur];
1598
1599                 bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1600                     BUS_DMASYNC_POSTREAD);
1601
1602                 hdr = mtod(data->m, struct iwi_hdr *);
1603
1604                 switch (hdr->type) {
1605                 case IWI_HDR_TYPE_FRAME:
1606                         iwi_frame_intr(sc, data, sc->rxq.cur,
1607                             (struct iwi_frame *)(hdr + 1));
1608                         break;
1609
1610                 case IWI_HDR_TYPE_NOTIF:
1611                         iwi_notification_intr(sc,
1612                             (struct iwi_notif *)(hdr + 1));
1613                         break;
1614
1615                 default:
1616                         device_printf(sc->sc_dev, "unknown hdr type %u\n",
1617                             hdr->type);
1618                 }
1619
1620                 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur));
1621
1622                 sc->rxq.cur = (sc->rxq.cur + 1) % IWI_RX_RING_COUNT;
1623         }
1624
1625         /* tell the firmware what we have processed */
1626         hw = (hw == 0) ? IWI_RX_RING_COUNT - 1 : hw - 1;
1627         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, hw);
1628 }
1629
1630 static void
1631 iwi_tx_intr(struct iwi_softc *sc, struct iwi_tx_ring *txq)
1632 {
1633         struct ifnet *ifp = sc->sc_ifp;
1634         struct iwi_tx_data *data;
1635         uint32_t hw;
1636
1637         hw = CSR_READ_4(sc, txq->csr_ridx);
1638
1639         for (; txq->next != hw;) {
1640                 data = &txq->data[txq->next];
1641
1642                 bus_dmamap_sync(txq->data_dmat, data->map,
1643                     BUS_DMASYNC_POSTWRITE);
1644                 bus_dmamap_unload(txq->data_dmat, data->map);
1645                 if (data->m->m_flags & M_TXCB)
1646                         ieee80211_process_callback(data->ni, data->m, 0/*XXX*/);
1647                 m_freem(data->m);
1648                 data->m = NULL;
1649                 ieee80211_free_node(data->ni);
1650                 data->ni = NULL;
1651
1652                 DPRINTFN(15, ("tx done idx=%u\n", txq->next));
1653
1654                 ifp->if_opackets++;
1655
1656                 txq->queued--;
1657                 txq->next = (txq->next + 1) % IWI_TX_RING_COUNT;
1658         }
1659
1660         sc->sc_tx_timer = 0;
1661         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1662
1663         if (sc->sc_softled)
1664                 iwi_led_event(sc, IWI_LED_TX);
1665
1666         iwi_start_locked(ifp);
1667 }
1668
1669 static void
1670 iwi_fatal_error_intr(struct iwi_softc *sc)
1671 {
1672         struct ifnet *ifp = sc->sc_ifp;
1673         struct ieee80211com *ic = ifp->if_l2com;
1674         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1675
1676         device_printf(sc->sc_dev, "firmware error\n");
1677         if (vap != NULL)
1678                 ieee80211_cancel_scan(vap);
1679         ieee80211_runtask(ic, &sc->sc_restarttask);
1680
1681         sc->flags &= ~IWI_FLAG_BUSY;
1682         sc->sc_busy_timer = 0;
1683         wakeup(sc);
1684 }
1685
1686 static void
1687 iwi_radio_off_intr(struct iwi_softc *sc)
1688 {
1689         struct ifnet *ifp = sc->sc_ifp;
1690         struct ieee80211com *ic = ifp->if_l2com;
1691
1692         ieee80211_runtask(ic, &sc->sc_radiofftask);
1693 }
1694
1695 static void
1696 iwi_intr(void *arg)
1697 {
1698         struct iwi_softc *sc = arg;
1699         uint32_t r;
1700         IWI_LOCK_DECL;
1701
1702         IWI_LOCK(sc);
1703
1704         if ((r = CSR_READ_4(sc, IWI_CSR_INTR)) == 0 || r == 0xffffffff) {
1705                 IWI_UNLOCK(sc);
1706                 return;
1707         }
1708
1709         /* acknowledge interrupts */
1710         CSR_WRITE_4(sc, IWI_CSR_INTR, r);
1711
1712         if (r & IWI_INTR_FATAL_ERROR) {
1713                 iwi_fatal_error_intr(sc);
1714                 goto done;
1715         }
1716
1717         if (r & IWI_INTR_FW_INITED) {
1718                 if (!(r & (IWI_INTR_FATAL_ERROR | IWI_INTR_PARITY_ERROR)))
1719                         wakeup(sc);
1720         }
1721
1722         if (r & IWI_INTR_RADIO_OFF)
1723                 iwi_radio_off_intr(sc);
1724
1725         if (r & IWI_INTR_CMD_DONE) {
1726                 sc->flags &= ~IWI_FLAG_BUSY;
1727                 sc->sc_busy_timer = 0;
1728                 wakeup(sc);
1729         }
1730
1731         if (r & IWI_INTR_TX1_DONE)
1732                 iwi_tx_intr(sc, &sc->txq[0]);
1733
1734         if (r & IWI_INTR_TX2_DONE)
1735                 iwi_tx_intr(sc, &sc->txq[1]);
1736
1737         if (r & IWI_INTR_TX3_DONE)
1738                 iwi_tx_intr(sc, &sc->txq[2]);
1739
1740         if (r & IWI_INTR_TX4_DONE)
1741                 iwi_tx_intr(sc, &sc->txq[3]);
1742
1743         if (r & IWI_INTR_RX_DONE)
1744                 iwi_rx_intr(sc);
1745
1746         if (r & IWI_INTR_PARITY_ERROR) {
1747                 /* XXX rate-limit */
1748                 device_printf(sc->sc_dev, "parity error\n");
1749         }
1750 done:
1751         IWI_UNLOCK(sc);
1752 }
1753
1754 static int
1755 iwi_cmd(struct iwi_softc *sc, uint8_t type, void *data, uint8_t len)
1756 {
1757         struct iwi_cmd_desc *desc;
1758
1759         IWI_LOCK_ASSERT(sc);
1760
1761         if (sc->flags & IWI_FLAG_BUSY) {
1762                 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n",
1763                         __func__, type);
1764                 return EAGAIN;
1765         }
1766         sc->flags |= IWI_FLAG_BUSY;
1767         sc->sc_busy_timer = 2;
1768
1769         desc = &sc->cmdq.desc[sc->cmdq.cur];
1770
1771         desc->hdr.type = IWI_HDR_TYPE_COMMAND;
1772         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1773         desc->type = type;
1774         desc->len = len;
1775         memcpy(desc->data, data, len);
1776
1777         bus_dmamap_sync(sc->cmdq.desc_dmat, sc->cmdq.desc_map,
1778             BUS_DMASYNC_PREWRITE);
1779
1780         DPRINTFN(2, ("sending command idx=%u type=%u len=%u\n", sc->cmdq.cur,
1781             type, len));
1782
1783         sc->cmdq.cur = (sc->cmdq.cur + 1) % IWI_CMD_RING_COUNT;
1784         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
1785
1786         return msleep(sc, &sc->sc_mtx, 0, "iwicmd", hz);
1787 }
1788
1789 static void
1790 iwi_write_ibssnode(struct iwi_softc *sc,
1791         const u_int8_t addr[IEEE80211_ADDR_LEN], int entry)
1792 {
1793         struct iwi_ibssnode node;
1794
1795         /* write node information into NIC memory */
1796         memset(&node, 0, sizeof node);
1797         IEEE80211_ADDR_COPY(node.bssid, addr);
1798
1799         DPRINTF(("%s mac %6D station %u\n", __func__, node.bssid, ":", entry));
1800
1801         CSR_WRITE_REGION_1(sc,
1802             IWI_CSR_NODE_BASE + entry * sizeof node,
1803             (uint8_t *)&node, sizeof node);
1804 }
1805
1806 static int
1807 iwi_tx_start(struct ifnet *ifp, struct mbuf *m0, struct ieee80211_node *ni,
1808     int ac)
1809 {
1810         struct iwi_softc *sc = ifp->if_softc;
1811         struct ieee80211vap *vap = ni->ni_vap;
1812         struct ieee80211com *ic = ni->ni_ic;
1813         struct iwi_node *in = (struct iwi_node *)ni;
1814         const struct ieee80211_frame *wh;
1815         struct ieee80211_key *k;
1816         const struct chanAccParams *cap;
1817         struct iwi_tx_ring *txq = &sc->txq[ac];
1818         struct iwi_tx_data *data;
1819         struct iwi_tx_desc *desc;
1820         struct mbuf *mnew;
1821         bus_dma_segment_t segs[IWI_MAX_NSEG];
1822         int error, nsegs, hdrlen, i;
1823         int ismcast, flags, xflags, staid;
1824
1825         IWI_LOCK_ASSERT(sc);
1826         wh = mtod(m0, const struct ieee80211_frame *);
1827         /* NB: only data frames use this path */
1828         hdrlen = ieee80211_hdrsize(wh);
1829         ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1830         flags = xflags = 0;
1831
1832         if (!ismcast)
1833                 flags |= IWI_DATA_FLAG_NEED_ACK;
1834         if (vap->iv_flags & IEEE80211_F_SHPREAMBLE)
1835                 flags |= IWI_DATA_FLAG_SHPREAMBLE;
1836         if (IEEE80211_QOS_HAS_SEQ(wh)) {
1837                 xflags |= IWI_DATA_XFLAG_QOS;
1838                 cap = &ic->ic_wme.wme_chanParams;
1839                 if (!cap->cap_wmeParams[ac].wmep_noackPolicy)
1840                         flags &= ~IWI_DATA_FLAG_NEED_ACK;
1841         }
1842
1843         /*
1844          * This is only used in IBSS mode where the firmware expect an index
1845          * in a h/w table instead of a destination address.
1846          */
1847         if (vap->iv_opmode == IEEE80211_M_IBSS) {
1848                 if (!ismcast) {
1849                         if (in->in_station == -1) {
1850                                 in->in_station = alloc_unr(sc->sc_unr);
1851                                 if (in->in_station == -1) {
1852                                         /* h/w table is full */
1853                                         m_freem(m0);
1854                                         ieee80211_free_node(ni);
1855                                         ifp->if_oerrors++;
1856                                         return 0;
1857                                 }
1858                                 iwi_write_ibssnode(sc,
1859                                         ni->ni_macaddr, in->in_station);
1860                         }
1861                         staid = in->in_station;
1862                 } else {
1863                         /*
1864                          * Multicast addresses have no associated node
1865                          * so there will be no station entry.  We reserve
1866                          * entry 0 for one mcast address and use that.
1867                          * If there are many being used this will be
1868                          * expensive and we'll need to do a better job
1869                          * but for now this handles the broadcast case.
1870                          */
1871                         if (!IEEE80211_ADDR_EQ(wh->i_addr1, sc->sc_mcast)) {
1872                                 IEEE80211_ADDR_COPY(sc->sc_mcast, wh->i_addr1);
1873                                 iwi_write_ibssnode(sc, sc->sc_mcast, 0);
1874                         }
1875                         staid = 0;
1876                 }
1877         } else
1878                 staid = 0;
1879
1880         if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1881                 k = ieee80211_crypto_encap(ni, m0);
1882                 if (k == NULL) {
1883                         m_freem(m0);
1884                         return ENOBUFS;
1885                 }
1886
1887                 /* packet header may have moved, reset our local pointer */
1888                 wh = mtod(m0, struct ieee80211_frame *);
1889         }
1890
1891         if (ieee80211_radiotap_active_vap(vap)) {
1892                 struct iwi_tx_radiotap_header *tap = &sc->sc_txtap;
1893
1894                 tap->wt_flags = 0;
1895
1896                 ieee80211_radiotap_tx(vap, m0);
1897         }
1898
1899         data = &txq->data[txq->cur];
1900         desc = &txq->desc[txq->cur];
1901
1902         /* save and trim IEEE802.11 header */
1903         m_copydata(m0, 0, hdrlen, (caddr_t)&desc->wh);
1904         m_adj(m0, hdrlen);
1905
1906         error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, segs,
1907             &nsegs, 0);
1908         if (error != 0 && error != EFBIG) {
1909                 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1910                     error);
1911                 m_freem(m0);
1912                 return error;
1913         }
1914         if (error != 0) {
1915                 mnew = m_defrag(m0, M_NOWAIT);
1916                 if (mnew == NULL) {
1917                         device_printf(sc->sc_dev,
1918                             "could not defragment mbuf\n");
1919                         m_freem(m0);
1920                         return ENOBUFS;
1921                 }
1922                 m0 = mnew;
1923
1924                 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map,
1925                     m0, segs, &nsegs, 0);
1926                 if (error != 0) {
1927                         device_printf(sc->sc_dev,
1928                             "could not map mbuf (error %d)\n", error);
1929                         m_freem(m0);
1930                         return error;
1931                 }
1932         }
1933
1934         data->m = m0;
1935         data->ni = ni;
1936
1937         desc->hdr.type = IWI_HDR_TYPE_DATA;
1938         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1939         desc->station = staid;
1940         desc->cmd = IWI_DATA_CMD_TX;
1941         desc->len = htole16(m0->m_pkthdr.len);
1942         desc->flags = flags;
1943         desc->xflags = xflags;
1944
1945 #if 0
1946         if (vap->iv_flags & IEEE80211_F_PRIVACY)
1947                 desc->wep_txkey = vap->iv_def_txkey;
1948         else
1949 #endif
1950                 desc->flags |= IWI_DATA_FLAG_NO_WEP;
1951
1952         desc->nseg = htole32(nsegs);
1953         for (i = 0; i < nsegs; i++) {
1954                 desc->seg_addr[i] = htole32(segs[i].ds_addr);
1955                 desc->seg_len[i]  = htole16(segs[i].ds_len);
1956         }
1957
1958         bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1959         bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE);
1960
1961         DPRINTFN(5, ("sending data frame txq=%u idx=%u len=%u nseg=%u\n",
1962             ac, txq->cur, le16toh(desc->len), nsegs));
1963
1964         txq->queued++;
1965         txq->cur = (txq->cur + 1) % IWI_TX_RING_COUNT;
1966         CSR_WRITE_4(sc, txq->csr_widx, txq->cur);
1967
1968         return 0;
1969 }
1970
1971 static int
1972 iwi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
1973         const struct ieee80211_bpf_params *params)
1974 {
1975         /* no support; just discard */
1976         m_freem(m);
1977         ieee80211_free_node(ni);
1978         return 0;
1979 }
1980
1981 static void
1982 iwi_start_locked(struct ifnet *ifp)
1983 {
1984         struct iwi_softc *sc = ifp->if_softc;
1985         struct mbuf *m;
1986         struct ieee80211_node *ni;
1987         int ac;
1988
1989         IWI_LOCK_ASSERT(sc);
1990
1991         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1992                 return;
1993
1994         for (;;) {
1995                 IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
1996                 if (m == NULL)
1997                         break;
1998                 ac = M_WME_GETAC(m);
1999                 if (sc->txq[ac].queued > IWI_TX_RING_COUNT - 8) {
2000                         /* there is no place left in this ring; tail drop */
2001                         /* XXX tail drop */
2002                         IFQ_DRV_PREPEND(&ifp->if_snd, m);
2003                         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
2004                         break;
2005                 }
2006
2007                 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
2008                 if (iwi_tx_start(ifp, m, ni, ac) != 0) {
2009                         ieee80211_free_node(ni);
2010                         ifp->if_oerrors++;
2011                         break;
2012                 }
2013
2014                 sc->sc_tx_timer = 5;
2015         }
2016 }
2017
2018 static void
2019 iwi_start(struct ifnet *ifp)
2020 {
2021         struct iwi_softc *sc = ifp->if_softc;
2022         IWI_LOCK_DECL;
2023
2024         IWI_LOCK(sc);
2025         iwi_start_locked(ifp);
2026         IWI_UNLOCK(sc);
2027 }
2028
2029 static void
2030 iwi_watchdog(void *arg)
2031 {
2032         struct iwi_softc *sc = arg;
2033         struct ifnet *ifp = sc->sc_ifp;
2034         struct ieee80211com *ic = ifp->if_l2com;
2035
2036         IWI_LOCK_ASSERT(sc);
2037
2038         if (sc->sc_tx_timer > 0) {
2039                 if (--sc->sc_tx_timer == 0) {
2040                         if_printf(ifp, "device timeout\n");
2041                         ifp->if_oerrors++;
2042                         ieee80211_runtask(ic, &sc->sc_restarttask);
2043                 }
2044         }
2045         if (sc->sc_state_timer > 0) {
2046                 if (--sc->sc_state_timer == 0) {
2047                         if_printf(ifp, "firmware stuck in state %d, resetting\n",
2048                             sc->fw_state);
2049                         if (sc->fw_state == IWI_FW_SCANNING) {
2050                                 struct ieee80211com *ic = ifp->if_l2com;
2051                                 ieee80211_cancel_scan(TAILQ_FIRST(&ic->ic_vaps));
2052                         }
2053                         ieee80211_runtask(ic, &sc->sc_restarttask);
2054                         sc->sc_state_timer = 3;
2055                 }
2056         }
2057         if (sc->sc_busy_timer > 0) {
2058                 if (--sc->sc_busy_timer == 0) {
2059                         if_printf(ifp, "firmware command timeout, resetting\n");
2060                         ieee80211_runtask(ic, &sc->sc_restarttask);
2061                 }
2062         }
2063         callout_reset(&sc->sc_wdtimer, hz, iwi_watchdog, sc);
2064 }
2065
2066 static int
2067 iwi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
2068 {
2069         struct iwi_softc *sc = ifp->if_softc;
2070         struct ieee80211com *ic = ifp->if_l2com;
2071         struct ifreq *ifr = (struct ifreq *) data;
2072         int error = 0, startall = 0;
2073         IWI_LOCK_DECL;
2074
2075         switch (cmd) {
2076         case SIOCSIFFLAGS:
2077                 IWI_LOCK(sc);
2078                 if (ifp->if_flags & IFF_UP) {
2079                         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2080                                 iwi_init_locked(sc);
2081                                 startall = 1;
2082                         }
2083                 } else {
2084                         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
2085                                 iwi_stop_locked(sc);
2086                 }
2087                 IWI_UNLOCK(sc);
2088                 if (startall)
2089                         ieee80211_start_all(ic);
2090                 break;
2091         case SIOCGIFMEDIA:
2092                 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
2093                 break;
2094         case SIOCGIFADDR:
2095                 error = ether_ioctl(ifp, cmd, data);
2096                 break;
2097         case SIOCGIWISTATS:
2098                 IWI_LOCK(sc);
2099                 /* XXX validate permissions/memory/etc? */
2100                 error = copyout(&sc->sc_linkqual, ifr->ifr_data,
2101                     sizeof(struct iwi_notif_link_quality));
2102                 IWI_UNLOCK(sc);
2103                 break;
2104         case SIOCZIWISTATS:
2105                 IWI_LOCK(sc);
2106                 memset(&sc->sc_linkqual, 0,
2107                     sizeof(struct iwi_notif_link_quality));
2108                 IWI_UNLOCK(sc);
2109                 error = 0;
2110                 break;
2111         default:
2112                 error = EINVAL;
2113                 break;
2114         }
2115                 return error;
2116 }
2117
2118 static void
2119 iwi_stop_master(struct iwi_softc *sc)
2120 {
2121         uint32_t tmp;
2122         int ntries;
2123
2124         /* disable interrupts */
2125         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, 0);
2126
2127         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_STOP_MASTER);
2128         for (ntries = 0; ntries < 5; ntries++) {
2129                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2130                         break;
2131                 DELAY(10);
2132         }
2133         if (ntries == 5)
2134                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2135
2136         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2137         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_PRINCETON_RESET);
2138
2139         sc->flags &= ~IWI_FLAG_FW_INITED;
2140 }
2141
2142 static int
2143 iwi_reset(struct iwi_softc *sc)
2144 {
2145         uint32_t tmp;
2146         int i, ntries;
2147
2148         iwi_stop_master(sc);
2149
2150         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2151         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2152
2153         CSR_WRITE_4(sc, IWI_CSR_READ_INT, IWI_READ_INT_INIT_HOST);
2154
2155         /* wait for clock stabilization */
2156         for (ntries = 0; ntries < 1000; ntries++) {
2157                 if (CSR_READ_4(sc, IWI_CSR_CTL) & IWI_CTL_CLOCK_READY)
2158                         break;
2159                 DELAY(200);
2160         }
2161         if (ntries == 1000) {
2162                 device_printf(sc->sc_dev,
2163                     "timeout waiting for clock stabilization\n");
2164                 return EIO;
2165         }
2166
2167         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2168         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_SOFT_RESET);
2169
2170         DELAY(10);
2171
2172         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2173         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2174
2175         /* clear NIC memory */
2176         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0);
2177         for (i = 0; i < 0xc000; i++)
2178                 CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2179
2180         return 0;
2181 }
2182
2183 static const struct iwi_firmware_ohdr *
2184 iwi_setup_ofw(struct iwi_softc *sc, struct iwi_fw *fw)
2185 {
2186         const struct firmware *fp = fw->fp;
2187         const struct iwi_firmware_ohdr *hdr;
2188
2189         if (fp->datasize < sizeof (struct iwi_firmware_ohdr)) {
2190                 device_printf(sc->sc_dev, "image '%s' too small\n", fp->name);
2191                 return NULL;
2192         }
2193         hdr = (const struct iwi_firmware_ohdr *)fp->data;
2194         if ((IWI_FW_GET_MAJOR(le32toh(hdr->version)) != IWI_FW_REQ_MAJOR) ||
2195             (IWI_FW_GET_MINOR(le32toh(hdr->version)) != IWI_FW_REQ_MINOR)) {
2196                 device_printf(sc->sc_dev, "version for '%s' %d.%d != %d.%d\n",
2197                     fp->name, IWI_FW_GET_MAJOR(le32toh(hdr->version)),
2198                     IWI_FW_GET_MINOR(le32toh(hdr->version)), IWI_FW_REQ_MAJOR,
2199                     IWI_FW_REQ_MINOR);
2200                 return NULL;
2201         }
2202         fw->data = ((const char *) fp->data) + sizeof(struct iwi_firmware_ohdr);
2203         fw->size = fp->datasize - sizeof(struct iwi_firmware_ohdr);
2204         fw->name = fp->name;
2205         return hdr;
2206 }
2207
2208 static const struct iwi_firmware_ohdr *
2209 iwi_setup_oucode(struct iwi_softc *sc, struct iwi_fw *fw)
2210 {
2211         const struct iwi_firmware_ohdr *hdr;
2212
2213         hdr = iwi_setup_ofw(sc, fw);
2214         if (hdr != NULL && le32toh(hdr->mode) != IWI_FW_MODE_UCODE) {
2215                 device_printf(sc->sc_dev, "%s is not a ucode image\n",
2216                     fw->name);
2217                 hdr = NULL;
2218         }
2219         return hdr;
2220 }
2221
2222 static void
2223 iwi_getfw(struct iwi_fw *fw, const char *fwname,
2224           struct iwi_fw *uc, const char *ucname)
2225 {
2226         if (fw->fp == NULL)
2227                 fw->fp = firmware_get(fwname);
2228         /* NB: pre-3.0 ucode is packaged separately */
2229         if (uc->fp == NULL && fw->fp != NULL && fw->fp->version < 300)
2230                 uc->fp = firmware_get(ucname);
2231 }
2232
2233 /*
2234  * Get the required firmware images if not already loaded.
2235  * Note that we hold firmware images so long as the device
2236  * is marked up in case we need to reload them on device init.
2237  * This is necessary because we re-init the device sometimes
2238  * from a context where we cannot read from the filesystem
2239  * (e.g. from the taskqueue thread when rfkill is re-enabled).
2240  * XXX return 0 on success, 1 on error.
2241  *
2242  * NB: the order of get'ing and put'ing images here is
2243  * intentional to support handling firmware images bundled
2244  * by operating mode and/or all together in one file with
2245  * the boot firmware as "master".
2246  */
2247 static int
2248 iwi_get_firmware(struct iwi_softc *sc, enum ieee80211_opmode opmode)
2249 {
2250         const struct iwi_firmware_hdr *hdr;
2251         const struct firmware *fp;
2252
2253         /* invalidate cached firmware on mode change */
2254         if (sc->fw_mode != opmode)
2255                 iwi_put_firmware(sc);
2256
2257         switch (opmode) {
2258         case IEEE80211_M_STA:
2259                 iwi_getfw(&sc->fw_fw, "iwi_bss", &sc->fw_uc, "iwi_ucode_bss");
2260                 break;
2261         case IEEE80211_M_IBSS:
2262                 iwi_getfw(&sc->fw_fw, "iwi_ibss", &sc->fw_uc, "iwi_ucode_ibss");
2263                 break;
2264         case IEEE80211_M_MONITOR:
2265                 iwi_getfw(&sc->fw_fw, "iwi_monitor",
2266                           &sc->fw_uc, "iwi_ucode_monitor");
2267                 break;
2268         default:
2269                 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode);
2270                 return EINVAL;
2271         }
2272         fp = sc->fw_fw.fp;
2273         if (fp == NULL) {
2274                 device_printf(sc->sc_dev, "could not load firmware\n");
2275                 goto bad;
2276         }
2277         if (fp->version < 300) {
2278                 /*
2279                  * Firmware prior to 3.0 was packaged as separate
2280                  * boot, firmware, and ucode images.  Verify the
2281                  * ucode image was read in, retrieve the boot image
2282                  * if needed, and check version stamps for consistency.
2283                  * The version stamps in the data are also checked
2284                  * above; this is a bit paranoid but is a cheap
2285                  * safeguard against mis-packaging.
2286                  */
2287                 if (sc->fw_uc.fp == NULL) {
2288                         device_printf(sc->sc_dev, "could not load ucode\n");
2289                         goto bad;
2290                 }
2291                 if (sc->fw_boot.fp == NULL) {
2292                         sc->fw_boot.fp = firmware_get("iwi_boot");
2293                         if (sc->fw_boot.fp == NULL) {
2294                                 device_printf(sc->sc_dev,
2295                                         "could not load boot firmware\n");
2296                                 goto bad;
2297                         }
2298                 }
2299                 if (sc->fw_boot.fp->version != sc->fw_fw.fp->version ||
2300                     sc->fw_boot.fp->version != sc->fw_uc.fp->version) {
2301                         device_printf(sc->sc_dev,
2302                             "firmware version mismatch: "
2303                             "'%s' is %d, '%s' is %d, '%s' is %d\n",
2304                             sc->fw_boot.fp->name, sc->fw_boot.fp->version,
2305                             sc->fw_uc.fp->name, sc->fw_uc.fp->version,
2306                             sc->fw_fw.fp->name, sc->fw_fw.fp->version
2307                         );
2308                         goto bad;
2309                 }
2310                 /*
2311                  * Check and setup each image.
2312                  */
2313                 if (iwi_setup_oucode(sc, &sc->fw_uc) == NULL ||
2314                     iwi_setup_ofw(sc, &sc->fw_boot) == NULL ||
2315                     iwi_setup_ofw(sc, &sc->fw_fw) == NULL)
2316                         goto bad;
2317         } else {
2318                 /*
2319                  * Check and setup combined image.
2320                  */
2321                 if (fp->datasize < sizeof(struct iwi_firmware_hdr)) {
2322                         device_printf(sc->sc_dev, "image '%s' too small\n",
2323                             fp->name);
2324                         goto bad;
2325                 }
2326                 hdr = (const struct iwi_firmware_hdr *)fp->data;
2327                 if (fp->datasize < sizeof(*hdr) + le32toh(hdr->bsize) + le32toh(hdr->usize)
2328                                 + le32toh(hdr->fsize)) {
2329                         device_printf(sc->sc_dev, "image '%s' too small (2)\n",
2330                             fp->name);
2331                         goto bad;
2332                 }
2333                 sc->fw_boot.data = ((const char *) fp->data) + sizeof(*hdr);
2334                 sc->fw_boot.size = le32toh(hdr->bsize);
2335                 sc->fw_boot.name = fp->name;
2336                 sc->fw_uc.data = sc->fw_boot.data + sc->fw_boot.size;
2337                 sc->fw_uc.size = le32toh(hdr->usize);
2338                 sc->fw_uc.name = fp->name;
2339                 sc->fw_fw.data = sc->fw_uc.data + sc->fw_uc.size;
2340                 sc->fw_fw.size = le32toh(hdr->fsize);
2341                 sc->fw_fw.name = fp->name;
2342         }
2343 #if 0
2344         device_printf(sc->sc_dev, "boot %d ucode %d fw %d bytes\n",
2345                 sc->fw_boot.size, sc->fw_uc.size, sc->fw_fw.size);
2346 #endif
2347
2348         sc->fw_mode = opmode;
2349         return 0;
2350 bad:
2351         iwi_put_firmware(sc);
2352         return 1;
2353 }
2354
2355 static void
2356 iwi_put_fw(struct iwi_fw *fw)
2357 {
2358         if (fw->fp != NULL) {
2359                 firmware_put(fw->fp, FIRMWARE_UNLOAD);
2360                 fw->fp = NULL;
2361         }
2362         fw->data = NULL;
2363         fw->size = 0;
2364         fw->name = NULL;
2365 }
2366
2367 /*
2368  * Release any cached firmware images.
2369  */
2370 static void
2371 iwi_put_firmware(struct iwi_softc *sc)
2372 {
2373         iwi_put_fw(&sc->fw_uc);
2374         iwi_put_fw(&sc->fw_fw);
2375         iwi_put_fw(&sc->fw_boot);
2376 }
2377
2378 static int
2379 iwi_load_ucode(struct iwi_softc *sc, const struct iwi_fw *fw)
2380 {
2381         uint32_t tmp;
2382         const uint16_t *w;
2383         const char *uc = fw->data;
2384         size_t size = fw->size;
2385         int i, ntries, error;
2386
2387         IWI_LOCK_ASSERT(sc);
2388         error = 0;
2389         CSR_WRITE_4(sc, IWI_CSR_RST, CSR_READ_4(sc, IWI_CSR_RST) |
2390             IWI_RST_STOP_MASTER);
2391         for (ntries = 0; ntries < 5; ntries++) {
2392                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2393                         break;
2394                 DELAY(10);
2395         }
2396         if (ntries == 5) {
2397                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2398                 error = EIO;
2399                 goto fail;
2400         }
2401
2402         MEM_WRITE_4(sc, 0x3000e0, 0x80000000);
2403         DELAY(5000);
2404
2405         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2406         tmp &= ~IWI_RST_PRINCETON_RESET;
2407         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2408
2409         DELAY(5000);
2410         MEM_WRITE_4(sc, 0x3000e0, 0);
2411         DELAY(1000);
2412         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 1);
2413         DELAY(1000);
2414         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 0);
2415         DELAY(1000);
2416         MEM_WRITE_1(sc, 0x200000, 0x00);
2417         MEM_WRITE_1(sc, 0x200000, 0x40);
2418         DELAY(1000);
2419
2420         /* write microcode into adapter memory */
2421         for (w = (const uint16_t *)uc; size > 0; w++, size -= 2)
2422                 MEM_WRITE_2(sc, 0x200010, htole16(*w));
2423
2424         MEM_WRITE_1(sc, 0x200000, 0x00);
2425         MEM_WRITE_1(sc, 0x200000, 0x80);
2426
2427         /* wait until we get an answer */
2428         for (ntries = 0; ntries < 100; ntries++) {
2429                 if (MEM_READ_1(sc, 0x200000) & 1)
2430                         break;
2431                 DELAY(100);
2432         }
2433         if (ntries == 100) {
2434                 device_printf(sc->sc_dev,
2435                     "timeout waiting for ucode to initialize\n");
2436                 error = EIO;
2437                 goto fail;
2438         }
2439
2440         /* read the answer or the firmware will not initialize properly */
2441         for (i = 0; i < 7; i++)
2442                 MEM_READ_4(sc, 0x200004);
2443
2444         MEM_WRITE_1(sc, 0x200000, 0x00);
2445
2446 fail:
2447         return error;
2448 }
2449
2450 /* macro to handle unaligned little endian data in firmware image */
2451 #define GETLE32(p) ((p)[0] | (p)[1] << 8 | (p)[2] << 16 | (p)[3] << 24)
2452
2453 static int
2454 iwi_load_firmware(struct iwi_softc *sc, const struct iwi_fw *fw)
2455 {
2456         u_char *p, *end;
2457         uint32_t sentinel, ctl, src, dst, sum, len, mlen, tmp;
2458         int ntries, error;
2459
2460         IWI_LOCK_ASSERT(sc);
2461
2462         /* copy firmware image to DMA memory */
2463         memcpy(sc->fw_virtaddr, fw->data, fw->size);
2464
2465         /* make sure the adapter will get up-to-date values */
2466         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_PREWRITE);
2467
2468         /* tell the adapter where the command blocks are stored */
2469         MEM_WRITE_4(sc, 0x3000a0, 0x27000);
2470
2471         /*
2472          * Store command blocks into adapter's internal memory using register
2473          * indirections. The adapter will read the firmware image through DMA
2474          * using information stored in command blocks.
2475          */
2476         src = sc->fw_physaddr;
2477         p = sc->fw_virtaddr;
2478         end = p + fw->size;
2479         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0x27000);
2480
2481         while (p < end) {
2482                 dst = GETLE32(p); p += 4; src += 4;
2483                 len = GETLE32(p); p += 4; src += 4;
2484                 p += len;
2485
2486                 while (len > 0) {
2487                         mlen = min(len, IWI_CB_MAXDATALEN);
2488
2489                         ctl = IWI_CB_DEFAULT_CTL | mlen;
2490                         sum = ctl ^ src ^ dst;
2491
2492                         /* write a command block */
2493                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, ctl);
2494                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, src);
2495                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, dst);
2496                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, sum);
2497
2498                         src += mlen;
2499                         dst += mlen;
2500                         len -= mlen;
2501                 }
2502         }
2503
2504         /* write a fictive final command block (sentinel) */
2505         sentinel = CSR_READ_4(sc, IWI_CSR_AUTOINC_ADDR);
2506         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2507
2508         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2509         tmp &= ~(IWI_RST_MASTER_DISABLED | IWI_RST_STOP_MASTER);
2510         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2511
2512         /* tell the adapter to start processing command blocks */
2513         MEM_WRITE_4(sc, 0x3000a4, 0x540100);
2514
2515         /* wait until the adapter reaches the sentinel */
2516         for (ntries = 0; ntries < 400; ntries++) {
2517                 if (MEM_READ_4(sc, 0x3000d0) >= sentinel)
2518                         break;
2519                 DELAY(100);
2520         }
2521         /* sync dma, just in case */
2522         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_POSTWRITE);
2523         if (ntries == 400) {
2524                 device_printf(sc->sc_dev,
2525                     "timeout processing command blocks for %s firmware\n",
2526                     fw->name);
2527                 return EIO;
2528         }
2529
2530         /* we're done with command blocks processing */
2531         MEM_WRITE_4(sc, 0x3000a4, 0x540c00);
2532
2533         /* allow interrupts so we know when the firmware is ready */
2534         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, IWI_INTR_MASK);
2535
2536         /* tell the adapter to initialize the firmware */
2537         CSR_WRITE_4(sc, IWI_CSR_RST, 0);
2538
2539         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2540         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_ALLOW_STANDBY);
2541
2542         /* wait at most one second for firmware initialization to complete */
2543         if ((error = msleep(sc, &sc->sc_mtx, 0, "iwiinit", hz)) != 0) {
2544                 device_printf(sc->sc_dev, "timeout waiting for %s firmware "
2545                     "initialization to complete\n", fw->name);
2546         }
2547
2548         return error;
2549 }
2550
2551 static int
2552 iwi_setpowermode(struct iwi_softc *sc, struct ieee80211vap *vap)
2553 {
2554         uint32_t data;
2555
2556         if (vap->iv_flags & IEEE80211_F_PMGTON) {
2557                 /* XXX set more fine-grained operation */
2558                 data = htole32(IWI_POWER_MODE_MAX);
2559         } else
2560                 data = htole32(IWI_POWER_MODE_CAM);
2561
2562         DPRINTF(("Setting power mode to %u\n", le32toh(data)));
2563         return iwi_cmd(sc, IWI_CMD_SET_POWER_MODE, &data, sizeof data);
2564 }
2565
2566 static int
2567 iwi_setwepkeys(struct iwi_softc *sc, struct ieee80211vap *vap)
2568 {
2569         struct iwi_wep_key wepkey;
2570         struct ieee80211_key *wk;
2571         int error, i;
2572
2573         for (i = 0; i < IEEE80211_WEP_NKID; i++) {
2574                 wk = &vap->iv_nw_keys[i];
2575
2576                 wepkey.cmd = IWI_WEP_KEY_CMD_SETKEY;
2577                 wepkey.idx = i;
2578                 wepkey.len = wk->wk_keylen;
2579                 memset(wepkey.key, 0, sizeof wepkey.key);
2580                 memcpy(wepkey.key, wk->wk_key, wk->wk_keylen);
2581                 DPRINTF(("Setting wep key index %u len %u\n", wepkey.idx,
2582                     wepkey.len));
2583                 error = iwi_cmd(sc, IWI_CMD_SET_WEP_KEY, &wepkey,
2584                     sizeof wepkey);
2585                 if (error != 0)
2586                         return error;
2587         }
2588         return 0;
2589 }
2590
2591 static int
2592 iwi_config(struct iwi_softc *sc)
2593 {
2594         struct ifnet *ifp = sc->sc_ifp;
2595         struct ieee80211com *ic = ifp->if_l2com;
2596         struct iwi_configuration config;
2597         struct iwi_rateset rs;
2598         struct iwi_txpower power;
2599         uint32_t data;
2600         int error, i;
2601
2602         IWI_LOCK_ASSERT(sc);
2603
2604         DPRINTF(("Setting MAC address to %6D\n", IF_LLADDR(ifp), ":"));
2605         error = iwi_cmd(sc, IWI_CMD_SET_MAC_ADDRESS, IF_LLADDR(ifp),
2606             IEEE80211_ADDR_LEN);
2607         if (error != 0)
2608                 return error;
2609
2610         memset(&config, 0, sizeof config);
2611         config.bluetooth_coexistence = sc->bluetooth;
2612         config.silence_threshold = 0x1e;
2613         config.antenna = sc->antenna;
2614         config.multicast_enabled = 1;
2615         config.answer_pbreq = (ic->ic_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2616         config.disable_unicast_decryption = 1;
2617         config.disable_multicast_decryption = 1;
2618         if (ic->ic_opmode == IEEE80211_M_MONITOR) {
2619                 config.allow_invalid_frames = 1;
2620                 config.allow_beacon_and_probe_resp = 1;
2621                 config.allow_mgt = 1;
2622         }
2623         DPRINTF(("Configuring adapter\n"));
2624         error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2625         if (error != 0)
2626                 return error;
2627         if (ic->ic_opmode == IEEE80211_M_IBSS) {
2628                 power.mode = IWI_MODE_11B;
2629                 power.nchan = 11;
2630                 for (i = 0; i < 11; i++) {
2631                         power.chan[i].chan = i + 1;
2632                         power.chan[i].power = IWI_TXPOWER_MAX;
2633                 }
2634                 DPRINTF(("Setting .11b channels tx power\n"));
2635                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2636                 if (error != 0)
2637                         return error;
2638
2639                 power.mode = IWI_MODE_11G;
2640                 DPRINTF(("Setting .11g channels tx power\n"));
2641                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2642                 if (error != 0)
2643                         return error;
2644         }
2645
2646         memset(&rs, 0, sizeof rs);
2647         rs.mode = IWI_MODE_11G;
2648         rs.type = IWI_RATESET_TYPE_SUPPORTED;
2649         rs.nrates = ic->ic_sup_rates[IEEE80211_MODE_11G].rs_nrates;
2650         memcpy(rs.rates, ic->ic_sup_rates[IEEE80211_MODE_11G].rs_rates,
2651             rs.nrates);
2652         DPRINTF(("Setting .11bg supported rates (%u)\n", rs.nrates));
2653         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2654         if (error != 0)
2655                 return error;
2656
2657         memset(&rs, 0, sizeof rs);
2658         rs.mode = IWI_MODE_11A;
2659         rs.type = IWI_RATESET_TYPE_SUPPORTED;
2660         rs.nrates = ic->ic_sup_rates[IEEE80211_MODE_11A].rs_nrates;
2661         memcpy(rs.rates, ic->ic_sup_rates[IEEE80211_MODE_11A].rs_rates,
2662             rs.nrates);
2663         DPRINTF(("Setting .11a supported rates (%u)\n", rs.nrates));
2664         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2665         if (error != 0)
2666                 return error;
2667
2668         data = htole32(arc4random());
2669         DPRINTF(("Setting initialization vector to %u\n", le32toh(data)));
2670         error = iwi_cmd(sc, IWI_CMD_SET_IV, &data, sizeof data);
2671         if (error != 0)
2672                 return error;
2673
2674         /* enable adapter */
2675         DPRINTF(("Enabling adapter\n"));
2676         return iwi_cmd(sc, IWI_CMD_ENABLE, NULL, 0);
2677 }
2678
2679 static __inline void
2680 set_scan_type(struct iwi_scan_ext *scan, int ix, int scan_type)
2681 {
2682         uint8_t *st = &scan->scan_type[ix / 2];
2683         if (ix % 2)
2684                 *st = (*st & 0xf0) | ((scan_type & 0xf) << 0);
2685         else
2686                 *st = (*st & 0x0f) | ((scan_type & 0xf) << 4);
2687 }
2688
2689 static int
2690 scan_type(const struct ieee80211_scan_state *ss,
2691         const struct ieee80211_channel *chan)
2692 {
2693         /* We can only set one essid for a directed scan */
2694         if (ss->ss_nssid != 0)
2695                 return IWI_SCAN_TYPE_BDIRECTED;
2696         if ((ss->ss_flags & IEEE80211_SCAN_ACTIVE) &&
2697             (chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0)
2698                 return IWI_SCAN_TYPE_BROADCAST;
2699         return IWI_SCAN_TYPE_PASSIVE;
2700 }
2701
2702 static __inline int
2703 scan_band(const struct ieee80211_channel *c)
2704 {
2705         return IEEE80211_IS_CHAN_5GHZ(c) ?  IWI_CHAN_5GHZ : IWI_CHAN_2GHZ;
2706 }
2707
2708 static void
2709 iwi_monitor_scan(void *arg, int npending)
2710 {
2711         struct iwi_softc *sc = arg;
2712         IWI_LOCK_DECL;
2713
2714         IWI_LOCK(sc);
2715         (void) iwi_scanchan(sc, 2000, 0);
2716         IWI_UNLOCK(sc);
2717 }
2718
2719 /*
2720  * Start a scan on the current channel or all channels.
2721  */
2722 static int
2723 iwi_scanchan(struct iwi_softc *sc, unsigned long maxdwell, int allchan)
2724 {
2725         struct ieee80211com *ic;
2726         struct ieee80211_channel *chan;
2727         struct ieee80211_scan_state *ss;
2728         struct iwi_scan_ext scan;
2729         int error = 0;
2730
2731         IWI_LOCK_ASSERT(sc);
2732         if (sc->fw_state == IWI_FW_SCANNING) {
2733                 /*
2734                  * This should not happen as we only trigger scan_next after
2735                  * completion
2736                  */
2737                 DPRINTF(("%s: called too early - still scanning\n", __func__));
2738                 return (EBUSY);
2739         }
2740         IWI_STATE_BEGIN(sc, IWI_FW_SCANNING);
2741
2742         ic = sc->sc_ifp->if_l2com;
2743         ss = ic->ic_scan;
2744
2745         memset(&scan, 0, sizeof scan);
2746         scan.full_scan_index = htole32(++sc->sc_scangen);
2747         scan.dwell_time[IWI_SCAN_TYPE_PASSIVE] = htole16(maxdwell);
2748         if (ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) {
2749                 /*
2750                  * Use very short dwell times for when we send probe request
2751                  * frames.  Without this bg scans hang.  Ideally this should
2752                  * be handled with early-termination as done by net80211 but
2753                  * that's not feasible (aborting a scan is problematic).
2754                  */
2755                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(30);
2756                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(30);
2757         } else {
2758                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(maxdwell);
2759                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(maxdwell);
2760         }
2761
2762         /* We can only set one essid for a directed scan */
2763         if (ss->ss_nssid != 0) {
2764                 error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ss->ss_ssid[0].ssid,
2765                     ss->ss_ssid[0].len);
2766                 if (error)
2767                         return (error);
2768         }
2769
2770         if (allchan) {
2771                 int i, next, band, b, bstart;
2772                 /*
2773                  * Convert scan list to run-length encoded channel list
2774                  * the firmware requires (preserving the order setup by
2775                  * net80211).  The first entry in each run specifies the
2776                  * band and the count of items in the run.
2777                  */
2778                 next = 0;               /* next open slot */
2779                 bstart = 0;             /* NB: not needed, silence compiler */
2780                 band = -1;              /* NB: impossible value */
2781                 KASSERT(ss->ss_last > 0, ("no channels"));
2782                 for (i = 0; i < ss->ss_last; i++) {
2783                         chan = ss->ss_chans[i];
2784                         b = scan_band(chan);
2785                         if (b != band) {
2786                                 if (band != -1)
2787                                         scan.channels[bstart] =
2788                                             (next - bstart) | band;
2789                                 /* NB: this allocates a slot for the run-len */
2790                                 band = b, bstart = next++;
2791                         }
2792                         if (next >= IWI_SCAN_CHANNELS) {
2793                                 DPRINTF(("truncating scan list\n"));
2794                                 break;
2795                         }
2796                         scan.channels[next] = ieee80211_chan2ieee(ic, chan);
2797                         set_scan_type(&scan, next, scan_type(ss, chan));
2798                         next++;
2799                 }
2800                 scan.channels[bstart] = (next - bstart) | band;
2801         } else {
2802                 /* Scan the current channel only */
2803                 chan = ic->ic_curchan;
2804                 scan.channels[0] = 1 | scan_band(chan);
2805                 scan.channels[1] = ieee80211_chan2ieee(ic, chan);
2806                 set_scan_type(&scan, 1, scan_type(ss, chan));
2807         }
2808 #ifdef IWI_DEBUG
2809         if (iwi_debug > 0) {
2810                 static const char *scantype[8] =
2811                    { "PSTOP", "PASV", "DIR", "BCAST", "BDIR", "5", "6", "7" };
2812                 int i;
2813                 printf("Scan request: index %u dwell %d/%d/%d\n"
2814                     , le32toh(scan.full_scan_index)
2815                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_PASSIVE])
2816                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BROADCAST])
2817                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED])
2818                 );
2819                 i = 0;
2820                 do {
2821                         int run = scan.channels[i];
2822                         if (run == 0)
2823                                 break;
2824                         printf("Scan %d %s channels:", run & 0x3f,
2825                             run & IWI_CHAN_2GHZ ? "2.4GHz" : "5GHz");
2826                         for (run &= 0x3f, i++; run > 0; run--, i++) {
2827                                 uint8_t type = scan.scan_type[i/2];
2828                                 printf(" %u/%s", scan.channels[i],
2829                                     scantype[(i & 1 ? type : type>>4) & 7]);
2830                         }
2831                         printf("\n");
2832                 } while (i < IWI_SCAN_CHANNELS);
2833         }
2834 #endif
2835
2836         return (iwi_cmd(sc, IWI_CMD_SCAN_EXT, &scan, sizeof scan));
2837 }
2838
2839 static int
2840 iwi_set_sensitivity(struct iwi_softc *sc, int8_t rssi_dbm)
2841 {
2842         struct iwi_sensitivity sens;
2843
2844         DPRINTF(("Setting sensitivity to %d\n", rssi_dbm));
2845
2846         memset(&sens, 0, sizeof sens);
2847         sens.rssi = htole16(rssi_dbm);
2848         return iwi_cmd(sc, IWI_CMD_SET_SENSITIVITY, &sens, sizeof sens);
2849 }
2850
2851 static int
2852 iwi_auth_and_assoc(struct iwi_softc *sc, struct ieee80211vap *vap)
2853 {
2854         struct ieee80211com *ic = vap->iv_ic;
2855         struct ifnet *ifp = vap->iv_ifp;
2856         struct ieee80211_node *ni;
2857         struct iwi_configuration config;
2858         struct iwi_associate *assoc = &sc->assoc;
2859         struct iwi_rateset rs;
2860         uint16_t capinfo;
2861         uint32_t data;
2862         int error, mode;
2863
2864         IWI_LOCK_ASSERT(sc);
2865
2866         ni = ieee80211_ref_node(vap->iv_bss);
2867
2868         if (sc->flags & IWI_FLAG_ASSOCIATED) {
2869                 DPRINTF(("Already associated\n"));
2870                 return (-1);
2871         }
2872
2873         IWI_STATE_BEGIN(sc, IWI_FW_ASSOCIATING);
2874         error = 0;
2875         mode = 0;
2876
2877         if (IEEE80211_IS_CHAN_A(ic->ic_curchan))
2878                 mode = IWI_MODE_11A;
2879         else if (IEEE80211_IS_CHAN_G(ic->ic_curchan))
2880                 mode = IWI_MODE_11G;
2881         if (IEEE80211_IS_CHAN_B(ic->ic_curchan))
2882                 mode = IWI_MODE_11B;
2883
2884         if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) {
2885                 memset(&config, 0, sizeof config);
2886                 config.bluetooth_coexistence = sc->bluetooth;
2887                 config.antenna = sc->antenna;
2888                 config.multicast_enabled = 1;
2889                 if (mode == IWI_MODE_11G)
2890                         config.use_protection = 1;
2891                 config.answer_pbreq =
2892                     (vap->iv_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2893                 config.disable_unicast_decryption = 1;
2894                 config.disable_multicast_decryption = 1;
2895                 DPRINTF(("Configuring adapter\n"));
2896                 error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2897                 if (error != 0)
2898                         goto done;
2899         }
2900
2901 #ifdef IWI_DEBUG
2902         if (iwi_debug > 0) {
2903                 printf("Setting ESSID to ");
2904                 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
2905                 printf("\n");
2906         }
2907 #endif
2908         error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ni->ni_essid, ni->ni_esslen);
2909         if (error != 0)
2910                 goto done;
2911
2912         error = iwi_setpowermode(sc, vap);
2913         if (error != 0)
2914                 goto done;
2915
2916         data = htole32(vap->iv_rtsthreshold);
2917         DPRINTF(("Setting RTS threshold to %u\n", le32toh(data)));
2918         error = iwi_cmd(sc, IWI_CMD_SET_RTS_THRESHOLD, &data, sizeof data);
2919         if (error != 0)
2920                 goto done;
2921
2922         data = htole32(vap->iv_fragthreshold);
2923         DPRINTF(("Setting fragmentation threshold to %u\n", le32toh(data)));
2924         error = iwi_cmd(sc, IWI_CMD_SET_FRAG_THRESHOLD, &data, sizeof data);
2925         if (error != 0)
2926                 goto done;
2927
2928         /* the rate set has already been "negotiated" */
2929         memset(&rs, 0, sizeof rs);
2930         rs.mode = mode;
2931         rs.type = IWI_RATESET_TYPE_NEGOTIATED;
2932         rs.nrates = ni->ni_rates.rs_nrates;
2933         if (rs.nrates > IWI_RATESET_SIZE) {
2934                 DPRINTF(("Truncating negotiated rate set from %u\n",
2935                     rs.nrates));
2936                 rs.nrates = IWI_RATESET_SIZE;
2937         }
2938         memcpy(rs.rates, ni->ni_rates.rs_rates, rs.nrates);
2939         DPRINTF(("Setting negotiated rates (%u)\n", rs.nrates));
2940         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2941         if (error != 0)
2942                 goto done;
2943
2944         memset(assoc, 0, sizeof *assoc);
2945
2946         if ((vap->iv_flags & IEEE80211_F_WME) && ni->ni_ies.wme_ie != NULL) {
2947                 /* NB: don't treat WME setup as failure */
2948                 if (iwi_wme_setparams(sc, ic) == 0 && iwi_wme_setie(sc) == 0)
2949                         assoc->policy |= htole16(IWI_POLICY_WME);
2950                 /* XXX complain on failure? */
2951         }
2952
2953         if (vap->iv_appie_wpa != NULL) {
2954                 struct ieee80211_appie *ie = vap->iv_appie_wpa;
2955
2956                 DPRINTF(("Setting optional IE (len=%u)\n", ie->ie_len));
2957                 error = iwi_cmd(sc, IWI_CMD_SET_OPTIE, ie->ie_data, ie->ie_len);
2958                 if (error != 0)
2959                         goto done;
2960         }
2961
2962         error = iwi_set_sensitivity(sc, ic->ic_node_getrssi(ni));
2963         if (error != 0)
2964                 goto done;
2965
2966         assoc->mode = mode;
2967         assoc->chan = ic->ic_curchan->ic_ieee;
2968         /*
2969          * NB: do not arrange for shared key auth w/o privacy
2970          *     (i.e. a wep key); it causes a firmware error.
2971          */
2972         if ((vap->iv_flags & IEEE80211_F_PRIVACY) &&
2973             ni->ni_authmode == IEEE80211_AUTH_SHARED) {
2974                 assoc->auth = IWI_AUTH_SHARED;
2975                 /*
2976                  * It's possible to have privacy marked but no default
2977                  * key setup.  This typically is due to a user app bug
2978                  * but if we blindly grab the key the firmware will
2979                  * barf so avoid it for now.
2980                  */
2981                 if (vap->iv_def_txkey != IEEE80211_KEYIX_NONE)
2982                         assoc->auth |= vap->iv_def_txkey << 4;
2983
2984                 error = iwi_setwepkeys(sc, vap);
2985                 if (error != 0)
2986                         goto done;
2987         }
2988         if (vap->iv_flags & IEEE80211_F_WPA)
2989                 assoc->policy |= htole16(IWI_POLICY_WPA);
2990         if (vap->iv_opmode == IEEE80211_M_IBSS && ni->ni_tstamp.tsf == 0)
2991                 assoc->type = IWI_HC_IBSS_START;
2992         else
2993                 assoc->type = IWI_HC_ASSOC;
2994         memcpy(assoc->tstamp, ni->ni_tstamp.data, 8);
2995
2996         if (vap->iv_opmode == IEEE80211_M_IBSS)
2997                 capinfo = IEEE80211_CAPINFO_IBSS;
2998         else
2999                 capinfo = IEEE80211_CAPINFO_ESS;
3000         if (vap->iv_flags & IEEE80211_F_PRIVACY)
3001                 capinfo |= IEEE80211_CAPINFO_PRIVACY;
3002         if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
3003             IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
3004                 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
3005         if (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)
3006                 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
3007         assoc->capinfo = htole16(capinfo);
3008
3009         assoc->lintval = htole16(ic->ic_lintval);
3010         assoc->intval = htole16(ni->ni_intval);
3011         IEEE80211_ADDR_COPY(assoc->bssid, ni->ni_bssid);
3012         if (vap->iv_opmode == IEEE80211_M_IBSS)
3013                 IEEE80211_ADDR_COPY(assoc->dst, ifp->if_broadcastaddr);
3014         else
3015                 IEEE80211_ADDR_COPY(assoc->dst, ni->ni_bssid);
3016
3017         DPRINTF(("%s bssid %6D dst %6D channel %u policy 0x%x "
3018             "auth %u capinfo 0x%x lintval %u bintval %u\n",
3019             assoc->type == IWI_HC_IBSS_START ? "Start" : "Join",
3020             assoc->bssid, ":", assoc->dst, ":",
3021             assoc->chan, le16toh(assoc->policy), assoc->auth,
3022             le16toh(assoc->capinfo), le16toh(assoc->lintval),
3023             le16toh(assoc->intval)));
3024         error = iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
3025 done:
3026         ieee80211_free_node(ni);
3027         if (error)
3028                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
3029
3030         return (error);
3031 }
3032
3033 static void
3034 iwi_disassoc(void *arg, int pending)
3035 {
3036         struct iwi_softc *sc = arg;
3037         IWI_LOCK_DECL;
3038
3039         IWI_LOCK(sc);
3040         iwi_disassociate(sc, 0);
3041         IWI_UNLOCK(sc);
3042 }
3043
3044 static int
3045 iwi_disassociate(struct iwi_softc *sc, int quiet)
3046 {
3047         struct iwi_associate *assoc = &sc->assoc;
3048
3049         if ((sc->flags & IWI_FLAG_ASSOCIATED) == 0) {
3050                 DPRINTF(("Not associated\n"));
3051                 return (-1);
3052         }
3053
3054         IWI_STATE_BEGIN(sc, IWI_FW_DISASSOCIATING);
3055
3056         if (quiet)
3057                 assoc->type = IWI_HC_DISASSOC_QUIET;
3058         else
3059                 assoc->type = IWI_HC_DISASSOC;
3060
3061         DPRINTF(("Trying to disassociate from %6D channel %u\n",
3062             assoc->bssid, ":", assoc->chan));
3063         return iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
3064 }
3065
3066 /*
3067  * release dma resources for the firmware
3068  */
3069 static void
3070 iwi_release_fw_dma(struct iwi_softc *sc)
3071 {
3072         if (sc->fw_flags & IWI_FW_HAVE_PHY)
3073                 bus_dmamap_unload(sc->fw_dmat, sc->fw_map);
3074         if (sc->fw_flags & IWI_FW_HAVE_MAP)
3075                 bus_dmamem_free(sc->fw_dmat, sc->fw_virtaddr, sc->fw_map);
3076         if (sc->fw_flags & IWI_FW_HAVE_DMAT)
3077                 bus_dma_tag_destroy(sc->fw_dmat);
3078
3079         sc->fw_flags = 0;
3080         sc->fw_dma_size = 0;
3081         sc->fw_dmat = NULL;
3082         sc->fw_map = NULL;
3083         sc->fw_physaddr = 0;
3084         sc->fw_virtaddr = NULL;
3085 }
3086
3087 /*
3088  * allocate the dma descriptor for the firmware.
3089  * Return 0 on success, 1 on error.
3090  * Must be called unlocked, protected by IWI_FLAG_FW_LOADING.
3091  */
3092 static int
3093 iwi_init_fw_dma(struct iwi_softc *sc, int size)
3094 {
3095         if (sc->fw_dma_size >= size)
3096                 return 0;
3097         if (bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
3098             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
3099             size, 1, size, 0, NULL, NULL, &sc->fw_dmat) != 0) {
3100                 device_printf(sc->sc_dev,
3101                     "could not create firmware DMA tag\n");
3102                 goto error;
3103         }
3104         sc->fw_flags |= IWI_FW_HAVE_DMAT;
3105         if (bus_dmamem_alloc(sc->fw_dmat, &sc->fw_virtaddr, 0,
3106             &sc->fw_map) != 0) {
3107                 device_printf(sc->sc_dev,
3108                     "could not allocate firmware DMA memory\n");
3109                 goto error;
3110         }
3111         sc->fw_flags |= IWI_FW_HAVE_MAP;
3112         if (bus_dmamap_load(sc->fw_dmat, sc->fw_map, sc->fw_virtaddr,
3113             size, iwi_dma_map_addr, &sc->fw_physaddr, 0) != 0) {
3114                 device_printf(sc->sc_dev, "could not load firmware DMA map\n");
3115                 goto error;
3116         }
3117         sc->fw_flags |= IWI_FW_HAVE_PHY;
3118         sc->fw_dma_size = size;
3119         return 0;
3120
3121 error:
3122         iwi_release_fw_dma(sc);
3123         return 1;
3124 }
3125
3126 static void
3127 iwi_init_locked(struct iwi_softc *sc)
3128 {
3129         struct ifnet *ifp = sc->sc_ifp;
3130         struct iwi_rx_data *data;
3131         int i;
3132
3133         IWI_LOCK_ASSERT(sc);
3134
3135         if (sc->fw_state == IWI_FW_LOADING) {
3136                 device_printf(sc->sc_dev, "%s: already loading\n", __func__);
3137                 return;         /* XXX: condvar? */
3138         }
3139
3140         iwi_stop_locked(sc);
3141
3142         IWI_STATE_BEGIN(sc, IWI_FW_LOADING);
3143
3144         if (iwi_reset(sc) != 0) {
3145                 device_printf(sc->sc_dev, "could not reset adapter\n");
3146                 goto fail;
3147         }
3148         if (iwi_load_firmware(sc, &sc->fw_boot) != 0) {
3149                 device_printf(sc->sc_dev,
3150                     "could not load boot firmware %s\n", sc->fw_boot.name);
3151                 goto fail;
3152         }
3153         if (iwi_load_ucode(sc, &sc->fw_uc) != 0) {
3154                 device_printf(sc->sc_dev,
3155                     "could not load microcode %s\n", sc->fw_uc.name);
3156                 goto fail;
3157         }
3158
3159         iwi_stop_master(sc);
3160
3161         CSR_WRITE_4(sc, IWI_CSR_CMD_BASE, sc->cmdq.physaddr);
3162         CSR_WRITE_4(sc, IWI_CSR_CMD_SIZE, sc->cmdq.count);
3163         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
3164
3165         CSR_WRITE_4(sc, IWI_CSR_TX1_BASE, sc->txq[0].physaddr);
3166         CSR_WRITE_4(sc, IWI_CSR_TX1_SIZE, sc->txq[0].count);
3167         CSR_WRITE_4(sc, IWI_CSR_TX1_WIDX, sc->txq[0].cur);
3168
3169         CSR_WRITE_4(sc, IWI_CSR_TX2_BASE, sc->txq[1].physaddr);
3170         CSR_WRITE_4(sc, IWI_CSR_TX2_SIZE, sc->txq[1].count);
3171         CSR_WRITE_4(sc, IWI_CSR_TX2_WIDX, sc->txq[1].cur);
3172
3173         CSR_WRITE_4(sc, IWI_CSR_TX3_BASE, sc->txq[2].physaddr);
3174         CSR_WRITE_4(sc, IWI_CSR_TX3_SIZE, sc->txq[2].count);
3175         CSR_WRITE_4(sc, IWI_CSR_TX3_WIDX, sc->txq[2].cur);
3176
3177         CSR_WRITE_4(sc, IWI_CSR_TX4_BASE, sc->txq[3].physaddr);
3178         CSR_WRITE_4(sc, IWI_CSR_TX4_SIZE, sc->txq[3].count);
3179         CSR_WRITE_4(sc, IWI_CSR_TX4_WIDX, sc->txq[3].cur);
3180
3181         for (i = 0; i < sc->rxq.count; i++) {
3182                 data = &sc->rxq.data[i];
3183                 CSR_WRITE_4(sc, data->reg, data->physaddr);
3184         }
3185
3186         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, sc->rxq.count - 1);
3187
3188         if (iwi_load_firmware(sc, &sc->fw_fw) != 0) {
3189                 device_printf(sc->sc_dev,
3190                     "could not load main firmware %s\n", sc->fw_fw.name);
3191                 goto fail;
3192         }
3193         sc->flags |= IWI_FLAG_FW_INITED;
3194
3195         IWI_STATE_END(sc, IWI_FW_LOADING);
3196
3197         if (iwi_config(sc) != 0) {
3198                 device_printf(sc->sc_dev, "unable to enable adapter\n");
3199                 goto fail2;
3200         }
3201
3202         callout_reset(&sc->sc_wdtimer, hz, iwi_watchdog, sc);
3203         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
3204         ifp->if_drv_flags |= IFF_DRV_RUNNING;
3205         return;
3206 fail:
3207         IWI_STATE_END(sc, IWI_FW_LOADING);
3208 fail2:
3209         iwi_stop_locked(sc);
3210 }
3211
3212 static void
3213 iwi_init(void *priv)
3214 {
3215         struct iwi_softc *sc = priv;
3216         struct ifnet *ifp = sc->sc_ifp;
3217         struct ieee80211com *ic = ifp->if_l2com;
3218         IWI_LOCK_DECL;
3219
3220         IWI_LOCK(sc);
3221         iwi_init_locked(sc);
3222         IWI_UNLOCK(sc);
3223
3224         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
3225                 ieee80211_start_all(ic);
3226 }
3227
3228 static void
3229 iwi_stop_locked(void *priv)
3230 {
3231         struct iwi_softc *sc = priv;
3232         struct ifnet *ifp = sc->sc_ifp;
3233
3234         IWI_LOCK_ASSERT(sc);
3235
3236         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
3237
3238         if (sc->sc_softled) {
3239                 callout_stop(&sc->sc_ledtimer);
3240                 sc->sc_blinking = 0;
3241         }
3242         callout_stop(&sc->sc_wdtimer);
3243         callout_stop(&sc->sc_rftimer);
3244
3245         iwi_stop_master(sc);
3246
3247         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_SOFT_RESET);
3248
3249         /* reset rings */
3250         iwi_reset_cmd_ring(sc, &sc->cmdq);
3251         iwi_reset_tx_ring(sc, &sc->txq[0]);
3252         iwi_reset_tx_ring(sc, &sc->txq[1]);
3253         iwi_reset_tx_ring(sc, &sc->txq[2]);
3254         iwi_reset_tx_ring(sc, &sc->txq[3]);
3255         iwi_reset_rx_ring(sc, &sc->rxq);
3256
3257         sc->sc_tx_timer = 0;
3258         sc->sc_state_timer = 0;
3259         sc->sc_busy_timer = 0;
3260         sc->flags &= ~(IWI_FLAG_BUSY | IWI_FLAG_ASSOCIATED);
3261         sc->fw_state = IWI_FW_IDLE;
3262         wakeup(sc);
3263 }
3264
3265 static void
3266 iwi_stop(struct iwi_softc *sc)
3267 {
3268         IWI_LOCK_DECL;
3269
3270         IWI_LOCK(sc);
3271         iwi_stop_locked(sc);
3272         IWI_UNLOCK(sc);
3273 }
3274
3275 static void
3276 iwi_restart(void *arg, int npending)
3277 {
3278         struct iwi_softc *sc = arg;
3279
3280         iwi_init(sc);
3281 }
3282
3283 /*
3284  * Return whether or not the radio is enabled in hardware
3285  * (i.e. the rfkill switch is "off").
3286  */
3287 static int
3288 iwi_getrfkill(struct iwi_softc *sc)
3289 {
3290         return (CSR_READ_4(sc, IWI_CSR_IO) & IWI_IO_RADIO_ENABLED) == 0;
3291 }
3292
3293 static void
3294 iwi_radio_on(void *arg, int pending)
3295 {
3296         struct iwi_softc *sc = arg;
3297         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
3298
3299         device_printf(sc->sc_dev, "radio turned on\n");
3300
3301         iwi_init(sc);
3302         ieee80211_notify_radio(ic, 1);
3303 }
3304
3305 static void
3306 iwi_rfkill_poll(void *arg)
3307 {
3308         struct iwi_softc *sc = arg;
3309
3310         IWI_LOCK_ASSERT(sc);
3311
3312         /*
3313          * Check for a change in rfkill state.  We get an
3314          * interrupt when a radio is disabled but not when
3315          * it is enabled so we must poll for the latter.
3316          */
3317         if (!iwi_getrfkill(sc)) {
3318                 struct ifnet *ifp = sc->sc_ifp;
3319                 struct ieee80211com *ic = ifp->if_l2com;
3320
3321                 ieee80211_runtask(ic, &sc->sc_radiontask);
3322                 return;
3323         }
3324         callout_reset(&sc->sc_rftimer, 2*hz, iwi_rfkill_poll, sc);
3325 }
3326
3327 static void
3328 iwi_radio_off(void *arg, int pending)
3329 {
3330         struct iwi_softc *sc = arg;
3331         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
3332         IWI_LOCK_DECL;
3333
3334         device_printf(sc->sc_dev, "radio turned off\n");
3335
3336         ieee80211_notify_radio(ic, 0);
3337
3338         IWI_LOCK(sc);
3339         iwi_stop_locked(sc);
3340         iwi_rfkill_poll(sc);
3341         IWI_UNLOCK(sc);
3342 }
3343
3344 static int
3345 iwi_sysctl_stats(SYSCTL_HANDLER_ARGS)
3346 {
3347         struct iwi_softc *sc = arg1;
3348         uint32_t size, buf[128];
3349
3350         memset(buf, 0, sizeof buf);
3351
3352         if (!(sc->flags & IWI_FLAG_FW_INITED))
3353                 return SYSCTL_OUT(req, buf, sizeof buf);
3354
3355         size = min(CSR_READ_4(sc, IWI_CSR_TABLE0_SIZE), 128 - 1);
3356         CSR_READ_REGION_4(sc, IWI_CSR_TABLE0_BASE, &buf[1], size);
3357
3358         return SYSCTL_OUT(req, buf, size);
3359 }
3360
3361 static int
3362 iwi_sysctl_radio(SYSCTL_HANDLER_ARGS)
3363 {
3364         struct iwi_softc *sc = arg1;
3365         int val = !iwi_getrfkill(sc);
3366
3367         return SYSCTL_OUT(req, &val, sizeof val);
3368 }
3369
3370 /*
3371  * Add sysctl knobs.
3372  */
3373 static void
3374 iwi_sysctlattach(struct iwi_softc *sc)
3375 {
3376         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
3377         struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
3378
3379         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "radio",
3380             CTLTYPE_INT | CTLFLAG_RD, sc, 0, iwi_sysctl_radio, "I",
3381             "radio transmitter switch state (0=off, 1=on)");
3382
3383         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "stats",
3384             CTLTYPE_OPAQUE | CTLFLAG_RD, sc, 0, iwi_sysctl_stats, "S",
3385             "statistics");
3386
3387         sc->bluetooth = 0;
3388         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "bluetooth",
3389             CTLFLAG_RW, &sc->bluetooth, 0, "bluetooth coexistence");
3390
3391         sc->antenna = IWI_ANTENNA_AUTO;
3392         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "antenna",
3393             CTLFLAG_RW, &sc->antenna, 0, "antenna (0=auto)");
3394 }
3395
3396 /*
3397  * LED support.
3398  *
3399  * Different cards have different capabilities.  Some have three
3400  * led's while others have only one.  The linux ipw driver defines
3401  * led's for link state (associated or not), band (11a, 11g, 11b),
3402  * and for link activity.  We use one led and vary the blink rate
3403  * according to the tx/rx traffic a la the ath driver.
3404  */
3405
3406 static __inline uint32_t
3407 iwi_toggle_event(uint32_t r)
3408 {
3409         return r &~ (IWI_RST_STANDBY | IWI_RST_GATE_ODMA |
3410                      IWI_RST_GATE_IDMA | IWI_RST_GATE_ADMA);
3411 }
3412
3413 static uint32_t
3414 iwi_read_event(struct iwi_softc *sc)
3415 {
3416         return MEM_READ_4(sc, IWI_MEM_EEPROM_EVENT);
3417 }
3418
3419 static void
3420 iwi_write_event(struct iwi_softc *sc, uint32_t v)
3421 {
3422         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, v);
3423 }
3424
3425 static void
3426 iwi_led_done(void *arg)
3427 {
3428         struct iwi_softc *sc = arg;
3429
3430         sc->sc_blinking = 0;
3431 }
3432
3433 /*
3434  * Turn the activity LED off: flip the pin and then set a timer so no
3435  * update will happen for the specified duration.
3436  */
3437 static void
3438 iwi_led_off(void *arg)
3439 {
3440         struct iwi_softc *sc = arg;
3441         uint32_t v;
3442
3443         v = iwi_read_event(sc);
3444         v &= ~sc->sc_ledpin;
3445         iwi_write_event(sc, iwi_toggle_event(v));
3446         callout_reset(&sc->sc_ledtimer, sc->sc_ledoff, iwi_led_done, sc);
3447 }
3448
3449 /*
3450  * Blink the LED according to the specified on/off times.
3451  */
3452 static void
3453 iwi_led_blink(struct iwi_softc *sc, int on, int off)
3454 {
3455         uint32_t v;
3456
3457         v = iwi_read_event(sc);
3458         v |= sc->sc_ledpin;
3459         iwi_write_event(sc, iwi_toggle_event(v));
3460         sc->sc_blinking = 1;
3461         sc->sc_ledoff = off;
3462         callout_reset(&sc->sc_ledtimer, on, iwi_led_off, sc);
3463 }
3464
3465 static void
3466 iwi_led_event(struct iwi_softc *sc, int event)
3467 {
3468 #define N(a)    (sizeof(a)/sizeof(a[0]))
3469         /* NB: on/off times from the Atheros NDIS driver, w/ permission */
3470         static const struct {
3471                 u_int           rate;           /* tx/rx iwi rate */
3472                 u_int16_t       timeOn;         /* LED on time (ms) */
3473                 u_int16_t       timeOff;        /* LED off time (ms) */
3474         } blinkrates[] = {
3475                 { IWI_RATE_OFDM54, 40,  10 },
3476                 { IWI_RATE_OFDM48, 44,  11 },
3477                 { IWI_RATE_OFDM36, 50,  13 },
3478                 { IWI_RATE_OFDM24, 57,  14 },
3479                 { IWI_RATE_OFDM18, 67,  16 },
3480                 { IWI_RATE_OFDM12, 80,  20 },
3481                 { IWI_RATE_DS11,  100,  25 },
3482                 { IWI_RATE_OFDM9, 133,  34 },
3483                 { IWI_RATE_OFDM6, 160,  40 },
3484                 { IWI_RATE_DS5,   200,  50 },
3485                 {            6,   240,  58 },   /* XXX 3Mb/s if it existed */
3486                 { IWI_RATE_DS2,   267,  66 },
3487                 { IWI_RATE_DS1,   400, 100 },
3488                 {            0,   500, 130 },   /* unknown rate/polling */
3489         };
3490         uint32_t txrate;
3491         int j = 0;                      /* XXX silence compiler */
3492
3493         sc->sc_ledevent = ticks;        /* time of last event */
3494         if (sc->sc_blinking)            /* don't interrupt active blink */
3495                 return;
3496         switch (event) {
3497         case IWI_LED_POLL:
3498                 j = N(blinkrates)-1;
3499                 break;
3500         case IWI_LED_TX:
3501                 /* read current transmission rate from adapter */
3502                 txrate = CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE);
3503                 if (blinkrates[sc->sc_txrix].rate != txrate) {
3504                         for (j = 0; j < N(blinkrates)-1; j++)
3505                                 if (blinkrates[j].rate == txrate)
3506                                         break;
3507                         sc->sc_txrix = j;
3508                 } else
3509                         j = sc->sc_txrix;
3510                 break;
3511         case IWI_LED_RX:
3512                 if (blinkrates[sc->sc_rxrix].rate != sc->sc_rxrate) {
3513                         for (j = 0; j < N(blinkrates)-1; j++)
3514                                 if (blinkrates[j].rate == sc->sc_rxrate)
3515                                         break;
3516                         sc->sc_rxrix = j;
3517                 } else
3518                         j = sc->sc_rxrix;
3519                 break;
3520         }
3521         /* XXX beware of overflow */
3522         iwi_led_blink(sc, (blinkrates[j].timeOn * hz) / 1000,
3523                 (blinkrates[j].timeOff * hz) / 1000);
3524 #undef N
3525 }
3526
3527 static int
3528 iwi_sysctl_softled(SYSCTL_HANDLER_ARGS)
3529 {
3530         struct iwi_softc *sc = arg1;
3531         int softled = sc->sc_softled;
3532         int error;
3533
3534         error = sysctl_handle_int(oidp, &softled, 0, req);
3535         if (error || !req->newptr)
3536                 return error;
3537         softled = (softled != 0);
3538         if (softled != sc->sc_softled) {
3539                 if (softled) {
3540                         uint32_t v = iwi_read_event(sc);
3541                         v &= ~sc->sc_ledpin;
3542                         iwi_write_event(sc, iwi_toggle_event(v));
3543                 }
3544                 sc->sc_softled = softled;
3545         }
3546         return 0;
3547 }
3548
3549 static void
3550 iwi_ledattach(struct iwi_softc *sc)
3551 {
3552         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
3553         struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
3554
3555         sc->sc_blinking = 0;
3556         sc->sc_ledstate = 1;
3557         sc->sc_ledidle = (2700*hz)/1000;        /* 2.7sec */
3558         callout_init_mtx(&sc->sc_ledtimer, &sc->sc_mtx, 0);
3559
3560         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3561                 "softled", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
3562                 iwi_sysctl_softled, "I", "enable/disable software LED support");
3563         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3564                 "ledpin", CTLFLAG_RW, &sc->sc_ledpin, 0,
3565                 "pin setting to turn activity LED on");
3566         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3567                 "ledidle", CTLFLAG_RW, &sc->sc_ledidle, 0,
3568                 "idle time for inactivity LED (ticks)");
3569         /* XXX for debugging */
3570         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3571                 "nictype", CTLFLAG_RD, &sc->sc_nictype, 0,
3572                 "NIC type from EEPROM");
3573
3574         sc->sc_ledpin = IWI_RST_LED_ACTIVITY;
3575         sc->sc_softled = 1;
3576
3577         sc->sc_nictype = (iwi_read_prom_word(sc, IWI_EEPROM_NIC) >> 8) & 0xff;
3578         if (sc->sc_nictype == 1) {
3579                 /*
3580                  * NB: led's are reversed.
3581                  */
3582                 sc->sc_ledpin = IWI_RST_LED_ASSOCIATED;
3583         }
3584 }
3585
3586 static void
3587 iwi_scan_start(struct ieee80211com *ic)
3588 {
3589         /* ignore */
3590 }
3591
3592 static void
3593 iwi_set_channel(struct ieee80211com *ic)
3594 {
3595         struct ifnet *ifp = ic->ic_ifp;
3596         struct iwi_softc *sc = ifp->if_softc;
3597         if (sc->fw_state == IWI_FW_IDLE)
3598                 iwi_setcurchan(sc, ic->ic_curchan->ic_ieee);
3599 }
3600
3601 static void
3602 iwi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
3603 {
3604         struct ieee80211vap *vap = ss->ss_vap;
3605         struct ifnet *ifp = vap->iv_ic->ic_ifp;
3606         struct iwi_softc *sc = ifp->if_softc;
3607         IWI_LOCK_DECL;
3608
3609         IWI_LOCK(sc);
3610         if (iwi_scanchan(sc, maxdwell, 0))
3611                 ieee80211_cancel_scan(vap);
3612         IWI_UNLOCK(sc);
3613 }
3614
3615 static void
3616 iwi_scan_mindwell(struct ieee80211_scan_state *ss)
3617 {
3618         /* NB: don't try to abort scan; wait for firmware to finish */
3619 }
3620
3621 static void
3622 iwi_scan_end(struct ieee80211com *ic)
3623 {
3624         struct ifnet *ifp = ic->ic_ifp;
3625         struct iwi_softc *sc = ifp->if_softc;
3626         IWI_LOCK_DECL;
3627
3628         IWI_LOCK(sc);
3629         sc->flags &= ~IWI_FLAG_CHANNEL_SCAN;
3630         /* NB: make sure we're still scanning */
3631         if (sc->fw_state == IWI_FW_SCANNING)
3632                 iwi_cmd(sc, IWI_CMD_ABORT_SCAN, NULL, 0);
3633         IWI_UNLOCK(sc);
3634 }