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_arp.h>
  68 #include <net/ethernet.h>
  69 #include <net/if_dl.h>
  70 #include <net/if_media.h>
  71 #include <net/if_types.h>
  72
  73 #include <net80211/ieee80211_var.h>
  74 #include <net80211/ieee80211_radiotap.h>
  75 #include <net80211/ieee80211_input.h>
  76 #include <net80211/ieee80211_regdomain.h>
  77
  78 #include <netinet/in.h>
  79 #include <netinet/in_systm.h>
  80 #include <netinet/in_var.h>
  81 #include <netinet/ip.h>
  82 #include <netinet/if_ether.h>
  83
  84 #include <dev/iwi/if_iwireg.h>
  85 #include <dev/iwi/if_iwivar.h>
  86
  87 #define IWI_DEBUG
  88 #ifdef IWI_DEBUG
  89 #define DPRINTF(x)      do { if (iwi_debug > 0) printf x; } while (0)
  90 #define DPRINTFN(n, x)  do { if (iwi_debug >= (n)) printf x; } while (0)
  91 int iwi_debug = 0;
  92 SYSCTL_INT(_debug, OID_AUTO, iwi, CTLFLAG_RW, &iwi_debug, 0, "iwi debug level");
  93
  94 static const char *iwi_fw_states[] = {
  95         "IDLE",                 /* IWI_FW_IDLE */
  96         "LOADING",              /* IWI_FW_LOADING */
  97         "ASSOCIATING",          /* IWI_FW_ASSOCIATING */
  98         "DISASSOCIATING",       /* IWI_FW_DISASSOCIATING */
  99         "SCANNING",             /* IWI_FW_SCANNING */
 100 };
 101 #else
 102 #define DPRINTF(x)
 103 #define DPRINTFN(n, x)
 104 #endif
 105
 106 MODULE_DEPEND(iwi, pci,  1, 1, 1);
 107 MODULE_DEPEND(iwi, wlan, 1, 1, 1);
 108 MODULE_DEPEND(iwi, firmware, 1, 1, 1);
 109
 110 enum {
 111         IWI_LED_TX,
 112         IWI_LED_RX,
 113         IWI_LED_POLL,
 114 };
 115
 116 struct iwi_ident {
 117         uint16_t        vendor;
 118         uint16_t        device;
 119         const char      *name;
 120 };
 121
 122 static const struct iwi_ident iwi_ident_table[] = {
 123         { 0x8086, 0x4220, "Intel(R) PRO/Wireless 2200BG" },
 124         { 0x8086, 0x4221, "Intel(R) PRO/Wireless 2225BG" },
 125         { 0x8086, 0x4223, "Intel(R) PRO/Wireless 2915ABG" },
 126         { 0x8086, 0x4224, "Intel(R) PRO/Wireless 2915ABG" },
 127
 128         { 0, 0, NULL }
 129 };
 130
 131 static struct ieee80211vap *iwi_vap_create(struct ieee80211com *,
 132                     const char [IFNAMSIZ], int, enum ieee80211_opmode, int,
 133                     const uint8_t [IEEE80211_ADDR_LEN],
 134                     const uint8_t [IEEE80211_ADDR_LEN]);
 135 static void     iwi_vap_delete(struct ieee80211vap *);
 136 static void     iwi_dma_map_addr(void *, bus_dma_segment_t *, int, int);
 137 static int      iwi_alloc_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *,
 138                     int);
 139 static void     iwi_reset_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 140 static void     iwi_free_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 141 static int      iwi_alloc_tx_ring(struct iwi_softc *, struct iwi_tx_ring *,
 142                     int, bus_addr_t, bus_addr_t);
 143 static void     iwi_reset_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 144 static void     iwi_free_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 145 static int      iwi_alloc_rx_ring(struct iwi_softc *, struct iwi_rx_ring *,
 146                     int);
 147 static void     iwi_reset_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 148 static void     iwi_free_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 149 static struct ieee80211_node *iwi_node_alloc(struct ieee80211vap *,
 150                     const uint8_t [IEEE80211_ADDR_LEN]);
 151 static void     iwi_node_free(struct ieee80211_node *);
 152 static void     iwi_media_status(struct ifnet *, struct ifmediareq *);
 153 static int      iwi_newstate(struct ieee80211vap *, enum ieee80211_state, int);
 154 static void     iwi_wme_init(struct iwi_softc *);
 155 static int      iwi_wme_setparams(struct iwi_softc *, struct ieee80211com *);
 156 static void     iwi_update_wme(void *, int);
 157 static int      iwi_wme_update(struct ieee80211com *);
 158 static uint16_t iwi_read_prom_word(struct iwi_softc *, uint8_t);
 159 static void     iwi_frame_intr(struct iwi_softc *, struct iwi_rx_data *, int,
 160                     struct iwi_frame *);
 161 static void     iwi_notification_intr(struct iwi_softc *, struct iwi_notif *);
 162 static void     iwi_rx_intr(struct iwi_softc *);
 163 static void     iwi_tx_intr(struct iwi_softc *, struct iwi_tx_ring *);
 164 static void     iwi_intr(void *);
 165 static int      iwi_cmd(struct iwi_softc *, uint8_t, void *, uint8_t);
 166 static void     iwi_write_ibssnode(struct iwi_softc *, const u_int8_t [], int);
 167 static int      iwi_tx_start(struct ifnet *, struct mbuf *,
 168                     struct ieee80211_node *, int);
 169 static int      iwi_raw_xmit(struct ieee80211_node *, struct mbuf *,
 170                     const struct ieee80211_bpf_params *);
 171 static void     iwi_start_locked(struct ifnet *);
 172 static void     iwi_start(struct ifnet *);
 173 static void     iwi_watchdog(void *);
 174 static int      iwi_ioctl(struct ifnet *, u_long, caddr_t);
 175 static void     iwi_stop_master(struct iwi_softc *);
 176 static int      iwi_reset(struct iwi_softc *);
 177 static int      iwi_load_ucode(struct iwi_softc *, const struct iwi_fw *);
 178 static int      iwi_load_firmware(struct iwi_softc *, const struct iwi_fw *);
 179 static void     iwi_release_fw_dma(struct iwi_softc *sc);
 180 static int      iwi_config(struct iwi_softc *);
 181 static int      iwi_get_firmware(struct iwi_softc *, enum ieee80211_opmode);
 182 static void     iwi_put_firmware(struct iwi_softc *);
 183 static void     iwi_monitor_scan(void *, int);
 184 static int      iwi_scanchan(struct iwi_softc *, unsigned long, int);
 185 static void     iwi_scan_start(struct ieee80211com *);
 186 static void     iwi_scan_end(struct ieee80211com *);
 187 static void     iwi_set_channel(struct ieee80211com *);
 188 static void     iwi_scan_curchan(struct ieee80211_scan_state *, unsigned long maxdwell);
 189 static void     iwi_scan_mindwell(struct ieee80211_scan_state *);
 190 static int      iwi_auth_and_assoc(struct iwi_softc *, struct ieee80211vap *);
 191 static void     iwi_disassoc(void *, int);
 192 static int      iwi_disassociate(struct iwi_softc *, int quiet);
 193 static void     iwi_init_locked(struct iwi_softc *);
 194 static void     iwi_init(void *);
 195 static int      iwi_init_fw_dma(struct iwi_softc *, int);
 196 static void     iwi_stop_locked(void *);
 197 static void     iwi_stop(struct iwi_softc *);
 198 static void     iwi_restart(void *, int);
 199 static int      iwi_getrfkill(struct iwi_softc *);
 200 static void     iwi_radio_on(void *, int);
 201 static void     iwi_radio_off(void *, int);
 202 static void     iwi_sysctlattach(struct iwi_softc *);
 203 static void     iwi_led_event(struct iwi_softc *, int);
 204 static void     iwi_ledattach(struct iwi_softc *);
 205
 206 static int iwi_probe(device_t);
 207 static int iwi_attach(device_t);
 208 static int iwi_detach(device_t);
 209 static int iwi_shutdown(device_t);
 210 static int iwi_suspend(device_t);
 211 static int iwi_resume(device_t);
 212
 213 static device_method_t iwi_methods[] = {
 214         /* Device interface */
 215         DEVMETHOD(device_probe,         iwi_probe),
 216         DEVMETHOD(device_attach,        iwi_attach),
 217         DEVMETHOD(device_detach,        iwi_detach),
 218         DEVMETHOD(device_shutdown,      iwi_shutdown),
 219         DEVMETHOD(device_suspend,       iwi_suspend),
 220         DEVMETHOD(device_resume,        iwi_resume),
 221
 222         { 0, 0 }
 223 };
 224
 225 static driver_t iwi_driver = {
 226         "iwi",
 227         iwi_methods,
 228         sizeof (struct iwi_softc)
 229 };
 230
 231 static devclass_t iwi_devclass;
 232
 233 DRIVER_MODULE(iwi, pci, iwi_driver, iwi_devclass, 0, 0);
 234
 235 MODULE_VERSION(iwi, 1);
 236
 237 static __inline uint8_t
 238 MEM_READ_1(struct iwi_softc *sc, uint32_t addr)
 239 {
 240         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 241         return CSR_READ_1(sc, IWI_CSR_INDIRECT_DATA);
 242 }
 243
 244 static __inline uint32_t
 245 MEM_READ_4(struct iwi_softc *sc, uint32_t addr)
 246 {
 247         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 248         return CSR_READ_4(sc, IWI_CSR_INDIRECT_DATA);
 249 }
 250
 251 static int
 252 iwi_probe(device_t dev)
 253 {
 254         const struct iwi_ident *ident;
 255
 256         for (ident = iwi_ident_table; ident->name != NULL; ident++) {
 257                 if (pci_get_vendor(dev) == ident->vendor &&
 258                     pci_get_device(dev) == ident->device) {
 259                         device_set_desc(dev, ident->name);
 260                         return 0;
 261                 }
 262         }
 263         return ENXIO;
 264 }
 265
 266 /* Base Address Register */
 267 #define IWI_PCI_BAR0    0x10
 268
 269 static int
 270 iwi_attach(device_t dev)
 271 {
 272         struct iwi_softc *sc = device_get_softc(dev);
 273         struct ifnet *ifp;
 274         struct ieee80211com *ic;
 275         uint16_t val;
 276         int i, error;
 277         uint8_t bands;
 278         uint8_t macaddr[IEEE80211_ADDR_LEN];
 279
 280         sc->sc_dev = dev;
 281
 282         ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211);
 283         if (ifp == NULL) {
 284                 device_printf(dev, "can not if_alloc()\n");
 285                 return ENXIO;
 286         }
 287         ic = ifp->if_l2com;
 288
 289         IWI_LOCK_INIT(sc);
 290
 291         sc->sc_unr = new_unrhdr(1, IWI_MAX_IBSSNODE-1, &sc->sc_mtx);
 292
 293         TASK_INIT(&sc->sc_radiontask, 0, iwi_radio_on, sc);
 294         TASK_INIT(&sc->sc_radiofftask, 0, iwi_radio_off, sc);
 295         TASK_INIT(&sc->sc_restarttask, 0, iwi_restart, sc);
 296         TASK_INIT(&sc->sc_disassoctask, 0, iwi_disassoc, sc);
 297         TASK_INIT(&sc->sc_wmetask, 0, iwi_update_wme, sc);
 298         TASK_INIT(&sc->sc_monitortask, 0, iwi_monitor_scan, sc);
 299
 300         callout_init_mtx(&sc->sc_wdtimer, &sc->sc_mtx, 0);
 301         callout_init_mtx(&sc->sc_rftimer, &sc->sc_mtx, 0);
 302
 303         if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
 304                 device_printf(dev, "chip is in D%d power mode "
 305                     "-- setting to D0\n", pci_get_powerstate(dev));
 306                 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
 307         }
 308
 309         pci_write_config(dev, 0x41, 0, 1);
 310
 311         /* enable bus-mastering */
 312         pci_enable_busmaster(dev);
 313
 314         sc->mem_rid = IWI_PCI_BAR0;
 315         sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid,
 316             RF_ACTIVE);
 317         if (sc->mem == NULL) {
 318                 device_printf(dev, "could not allocate memory resource\n");
 319                 goto fail;
 320         }
 321
 322         sc->sc_st = rman_get_bustag(sc->mem);
 323         sc->sc_sh = rman_get_bushandle(sc->mem);
 324
 325         sc->irq_rid = 0;
 326         sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
 327             RF_ACTIVE | RF_SHAREABLE);
 328         if (sc->irq == NULL) {
 329                 device_printf(dev, "could not allocate interrupt resource\n");
 330                 goto fail;
 331         }
 332
 333         if (iwi_reset(sc) != 0) {
 334                 device_printf(dev, "could not reset adapter\n");
 335                 goto fail;
 336         }
 337
 338         /*
 339          * Allocate rings.
 340          */
 341         if (iwi_alloc_cmd_ring(sc, &sc->cmdq, IWI_CMD_RING_COUNT) != 0) {
 342                 device_printf(dev, "could not allocate Cmd ring\n");
 343                 goto fail;
 344         }
 345
 346         for (i = 0; i < 4; i++) {
 347                 error = iwi_alloc_tx_ring(sc, &sc->txq[i], IWI_TX_RING_COUNT,
 348                     IWI_CSR_TX1_RIDX + i * 4,
 349                     IWI_CSR_TX1_WIDX + i * 4);
 350                 if (error != 0) {
 351                         device_printf(dev, "could not allocate Tx ring %d\n",
 352                                 i+i);
 353                         goto fail;
 354                 }
 355         }
 356
 357         if (iwi_alloc_rx_ring(sc, &sc->rxq, IWI_RX_RING_COUNT) != 0) {
 358                 device_printf(dev, "could not allocate Rx ring\n");
 359                 goto fail;
 360         }
 361
 362         iwi_wme_init(sc);
 363
 364         ifp->if_softc = sc;
 365         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 366         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
 367         ifp->if_init = iwi_init;
 368         ifp->if_ioctl = iwi_ioctl;
 369         ifp->if_start = iwi_start;
 370         IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
 371         ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
 372         IFQ_SET_READY(&ifp->if_snd);
 373
 374         ic->ic_ifp = ifp;
 375         ic->ic_opmode = IEEE80211_M_STA;
 376         ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
 377
 378         /* set device capabilities */
 379         ic->ic_caps =
 380               IEEE80211_C_STA           /* station mode supported */
 381             | IEEE80211_C_IBSS          /* IBSS mode supported */
 382             | IEEE80211_C_MONITOR       /* monitor mode supported */
 383             | IEEE80211_C_PMGT          /* power save supported */
 384             | IEEE80211_C_SHPREAMBLE    /* short preamble supported */
 385             | IEEE80211_C_WPA           /* 802.11i */
 386             | IEEE80211_C_WME           /* 802.11e */
 387 #if 0
 388             | IEEE80211_C_BGSCAN        /* capable of bg scanning */
 389 #endif
 390             ;
 391
 392         /* read MAC address from EEPROM */
 393         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 0);
 394         macaddr[0] = val & 0xff;
 395         macaddr[1] = val >> 8;
 396         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 1);
 397         macaddr[2] = val & 0xff;
 398         macaddr[3] = val >> 8;
 399         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 2);
 400         macaddr[4] = val & 0xff;
 401         macaddr[5] = val >> 8;
 402
 403         bands = 0;
 404         setbit(&bands, IEEE80211_MODE_11B);
 405         setbit(&bands, IEEE80211_MODE_11G);
 406         if (pci_get_device(dev) >= 0x4223)
 407                 setbit(&bands, IEEE80211_MODE_11A);
 408         ieee80211_init_channels(ic, NULL, &bands);
 409
 410         ieee80211_ifattach(ic, macaddr);
 411         /* override default methods */
 412         ic->ic_node_alloc = iwi_node_alloc;
 413         sc->sc_node_free = ic->ic_node_free;
 414         ic->ic_node_free = iwi_node_free;
 415         ic->ic_raw_xmit = iwi_raw_xmit;
 416         ic->ic_scan_start = iwi_scan_start;
 417         ic->ic_scan_end = iwi_scan_end;
 418         ic->ic_set_channel = iwi_set_channel;
 419         ic->ic_scan_curchan = iwi_scan_curchan;
 420         ic->ic_scan_mindwell = iwi_scan_mindwell;
 421         ic->ic_wme.wme_update = iwi_wme_update;
 422
 423         ic->ic_vap_create = iwi_vap_create;
 424         ic->ic_vap_delete = iwi_vap_delete;
 425
 426         ieee80211_radiotap_attach(ic,
 427             &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
 428                 IWI_TX_RADIOTAP_PRESENT,
 429             &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
 430                 IWI_RX_RADIOTAP_PRESENT);
 431
 432         iwi_sysctlattach(sc);
 433         iwi_ledattach(sc);
 434
 435         /*
 436          * Hook our interrupt after all initialization is complete.
 437          */
 438         error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE,
 439             NULL, iwi_intr, sc, &sc->sc_ih);
 440         if (error != 0) {
 441                 device_printf(dev, "could not set up interrupt\n");
 442                 goto fail;
 443         }
 444
 445         if (bootverbose)
 446                 ieee80211_announce(ic);
 447
 448         return 0;
 449 fail:
 450         /* XXX fix */
 451         iwi_detach(dev);
 452         return ENXIO;
 453 }
 454
 455 static int
 456 iwi_detach(device_t dev)
 457 {
 458         struct iwi_softc *sc = device_get_softc(dev);
 459         struct ifnet *ifp = sc->sc_ifp;
 460         struct ieee80211com *ic = ifp->if_l2com;
 461
 462         /* NB: do early to drain any pending tasks */
 463         ieee80211_draintask(ic, &sc->sc_radiontask);
 464         ieee80211_draintask(ic, &sc->sc_radiofftask);
 465         ieee80211_draintask(ic, &sc->sc_restarttask);
 466         ieee80211_draintask(ic, &sc->sc_disassoctask);
 467         ieee80211_draintask(ic, &sc->sc_monitortask);
 468
 469         iwi_stop(sc);
 470
 471         ieee80211_ifdetach(ic);
 472
 473         iwi_put_firmware(sc);
 474         iwi_release_fw_dma(sc);
 475
 476         iwi_free_cmd_ring(sc, &sc->cmdq);
 477         iwi_free_tx_ring(sc, &sc->txq[0]);
 478         iwi_free_tx_ring(sc, &sc->txq[1]);
 479         iwi_free_tx_ring(sc, &sc->txq[2]);
 480         iwi_free_tx_ring(sc, &sc->txq[3]);
 481         iwi_free_rx_ring(sc, &sc->rxq);
 482
 483         bus_teardown_intr(dev, sc->irq, sc->sc_ih);
 484         bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, sc->irq);
 485
 486         bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, sc->mem);
 487
 488         delete_unrhdr(sc->sc_unr);
 489
 490         IWI_LOCK_DESTROY(sc);
 491
 492         if_free(ifp);
 493
 494         return 0;
 495 }
 496
 497 static struct ieee80211vap *
 498 iwi_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
 499     enum ieee80211_opmode opmode, int flags,
 500     const uint8_t bssid[IEEE80211_ADDR_LEN],
 501     const uint8_t mac[IEEE80211_ADDR_LEN])
 502 {
 503         struct ifnet *ifp = ic->ic_ifp;
 504         struct iwi_softc *sc = ifp->if_softc;
 505         struct iwi_vap *ivp;
 506         struct ieee80211vap *vap;
 507         int i;
 508
 509         if (!TAILQ_EMPTY(&ic->ic_vaps))         /* only one at a time */
 510                 return NULL;
 511         /*
 512          * Get firmware image (and possibly dma memory) on mode change.
 513          */
 514         if (iwi_get_firmware(sc, opmode))
 515                 return NULL;
 516         /* allocate DMA memory for mapping firmware image */
 517         i = sc->fw_fw.size;
 518         if (sc->fw_boot.size > i)
 519                 i = sc->fw_boot.size;
 520         /* XXX do we dma the ucode as well ? */
 521         if (sc->fw_uc.size > i)
 522                 i = sc->fw_uc.size;
 523         if (iwi_init_fw_dma(sc, i))
 524                 return NULL;
 525
 526         ivp = (struct iwi_vap *) malloc(sizeof(struct iwi_vap),
 527             M_80211_VAP, M_NOWAIT | M_ZERO);
 528         if (ivp == NULL)
 529                 return NULL;
 530         vap = &ivp->iwi_vap;
 531         ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
 532         /* override the default, the setting comes from the linux driver */
 533         vap->iv_bmissthreshold = 24;
 534         /* override with driver methods */
 535         ivp->iwi_newstate = vap->iv_newstate;
 536         vap->iv_newstate = iwi_newstate;
 537
 538         /* complete setup */
 539         ieee80211_vap_attach(vap, ieee80211_media_change, iwi_media_status);
 540         ic->ic_opmode = opmode;
 541         return vap;
 542 }
 543
 544 static void
 545 iwi_vap_delete(struct ieee80211vap *vap)
 546 {
 547         struct iwi_vap *ivp = IWI_VAP(vap);
 548
 549         ieee80211_vap_detach(vap);
 550         free(ivp, M_80211_VAP);
 551 }
 552
 553 static void
 554 iwi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 555 {
 556         if (error != 0)
 557                 return;
 558
 559         KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
 560
 561         *(bus_addr_t *)arg = segs[0].ds_addr;
 562 }
 563
 564 static int
 565 iwi_alloc_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring, int count)
 566 {
 567         int error;
 568
 569         ring->count = count;
 570         ring->queued = 0;
 571         ring->cur = ring->next = 0;
 572
 573         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
 574             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 575             count * IWI_CMD_DESC_SIZE, 1, count * IWI_CMD_DESC_SIZE, 0,
 576             NULL, NULL, &ring->desc_dmat);
 577         if (error != 0) {
 578                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 579                 goto fail;
 580         }
 581
 582         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 583             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 584         if (error != 0) {
 585                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 586                 goto fail;
 587         }
 588
 589         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 590             count * IWI_CMD_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 591         if (error != 0) {
 592                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 593                 goto fail;
 594         }
 595
 596         return 0;
 597
 598 fail:   iwi_free_cmd_ring(sc, ring);
 599         return error;
 600 }
 601
 602 static void
 603 iwi_reset_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 604 {
 605         ring->queued = 0;
 606         ring->cur = ring->next = 0;
 607 }
 608
 609 static void
 610 iwi_free_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 611 {
 612         if (ring->desc != NULL) {
 613                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 614                     BUS_DMASYNC_POSTWRITE);
 615                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 616                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 617         }
 618
 619         if (ring->desc_dmat != NULL)
 620                 bus_dma_tag_destroy(ring->desc_dmat);
 621 }
 622
 623 static int
 624 iwi_alloc_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring, int count,
 625     bus_addr_t csr_ridx, bus_addr_t csr_widx)
 626 {
 627         int i, error;
 628
 629         ring->count = count;
 630         ring->queued = 0;
 631         ring->cur = ring->next = 0;
 632         ring->csr_ridx = csr_ridx;
 633         ring->csr_widx = csr_widx;
 634
 635         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
 636             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 637             count * IWI_TX_DESC_SIZE, 1, count * IWI_TX_DESC_SIZE, 0, NULL,
 638             NULL, &ring->desc_dmat);
 639         if (error != 0) {
 640                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 641                 goto fail;
 642         }
 643
 644         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 645             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 646         if (error != 0) {
 647                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 648                 goto fail;
 649         }
 650
 651         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 652             count * IWI_TX_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 653         if (error != 0) {
 654                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 655                 goto fail;
 656         }
 657
 658         ring->data = malloc(count * sizeof (struct iwi_tx_data), M_DEVBUF,
 659             M_NOWAIT | M_ZERO);
 660         if (ring->data == NULL) {
 661                 device_printf(sc->sc_dev, "could not allocate soft data\n");
 662                 error = ENOMEM;
 663                 goto fail;
 664         }
 665
 666         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
 667         BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
 668         IWI_MAX_NSEG, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
 669         if (error != 0) {
 670                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 671                 goto fail;
 672         }
 673
 674         for (i = 0; i < count; i++) {
 675                 error = bus_dmamap_create(ring->data_dmat, 0,
 676                     &ring->data[i].map);
 677                 if (error != 0) {
 678                         device_printf(sc->sc_dev, "could not create DMA map\n");
 679                         goto fail;
 680                 }
 681         }
 682
 683         return 0;
 684
 685 fail:   iwi_free_tx_ring(sc, ring);
 686         return error;
 687 }
 688
 689 static void
 690 iwi_reset_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 691 {
 692         struct iwi_tx_data *data;
 693         int i;
 694
 695         for (i = 0; i < ring->count; i++) {
 696                 data = &ring->data[i];
 697
 698                 if (data->m != NULL) {
 699                         bus_dmamap_sync(ring->data_dmat, data->map,
 700                             BUS_DMASYNC_POSTWRITE);
 701                         bus_dmamap_unload(ring->data_dmat, data->map);
 702                         m_freem(data->m);
 703                         data->m = NULL;
 704                 }
 705
 706                 if (data->ni != NULL) {
 707                         ieee80211_free_node(data->ni);
 708                         data->ni = NULL;
 709                 }
 710         }
 711
 712         ring->queued = 0;
 713         ring->cur = ring->next = 0;
 714 }
 715
 716 static void
 717 iwi_free_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 718 {
 719         struct iwi_tx_data *data;
 720         int i;
 721
 722         if (ring->desc != NULL) {
 723                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 724                     BUS_DMASYNC_POSTWRITE);
 725                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 726                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 727         }
 728
 729         if (ring->desc_dmat != NULL)
 730                 bus_dma_tag_destroy(ring->desc_dmat);
 731
 732         if (ring->data != NULL) {
 733                 for (i = 0; i < ring->count; i++) {
 734                         data = &ring->data[i];
 735
 736                         if (data->m != NULL) {
 737                                 bus_dmamap_sync(ring->data_dmat, data->map,
 738                                     BUS_DMASYNC_POSTWRITE);
 739                                 bus_dmamap_unload(ring->data_dmat, data->map);
 740                                 m_freem(data->m);
 741                         }
 742
 743                         if (data->ni != NULL)
 744                                 ieee80211_free_node(data->ni);
 745
 746                         if (data->map != NULL)
 747                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 748                 }
 749
 750                 free(ring->data, M_DEVBUF);
 751         }
 752
 753         if (ring->data_dmat != NULL)
 754                 bus_dma_tag_destroy(ring->data_dmat);
 755 }
 756
 757 static int
 758 iwi_alloc_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring, int count)
 759 {
 760         struct iwi_rx_data *data;
 761         int i, error;
 762
 763         ring->count = count;
 764         ring->cur = 0;
 765
 766         ring->data = malloc(count * sizeof (struct iwi_rx_data), M_DEVBUF,
 767             M_NOWAIT | M_ZERO);
 768         if (ring->data == NULL) {
 769                 device_printf(sc->sc_dev, "could not allocate soft data\n");
 770                 error = ENOMEM;
 771                 goto fail;
 772         }
 773
 774         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
 775             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
 776             1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
 777         if (error != 0) {
 778                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 779                 goto fail;
 780         }
 781
 782         for (i = 0; i < count; i++) {
 783                 data = &ring->data[i];
 784
 785                 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
 786                 if (error != 0) {
 787                         device_printf(sc->sc_dev, "could not create DMA map\n");
 788                         goto fail;
 789                 }
 790
 791                 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
 792                 if (data->m == NULL) {
 793                         device_printf(sc->sc_dev,
 794                             "could not allocate rx mbuf\n");
 795                         error = ENOMEM;
 796                         goto fail;
 797                 }
 798
 799                 error = bus_dmamap_load(ring->data_dmat, data->map,
 800                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
 801                     &data->physaddr, 0);
 802                 if (error != 0) {
 803                         device_printf(sc->sc_dev,
 804                             "could not load rx buf DMA map");
 805                         goto fail;
 806                 }
 807
 808                 data->reg = IWI_CSR_RX_BASE + i * 4;
 809         }
 810
 811         return 0;
 812
 813 fail:   iwi_free_rx_ring(sc, ring);
 814         return error;
 815 }
 816
 817 static void
 818 iwi_reset_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 819 {
 820         ring->cur = 0;
 821 }
 822
 823 static void
 824 iwi_free_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 825 {
 826         struct iwi_rx_data *data;
 827         int i;
 828
 829         if (ring->data != NULL) {
 830                 for (i = 0; i < ring->count; i++) {
 831                         data = &ring->data[i];
 832
 833                         if (data->m != NULL) {
 834                                 bus_dmamap_sync(ring->data_dmat, data->map,
 835                                     BUS_DMASYNC_POSTREAD);
 836                                 bus_dmamap_unload(ring->data_dmat, data->map);
 837                                 m_freem(data->m);
 838                         }
 839
 840                         if (data->map != NULL)
 841                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 842                 }
 843
 844                 free(ring->data, M_DEVBUF);
 845         }
 846
 847         if (ring->data_dmat != NULL)
 848                 bus_dma_tag_destroy(ring->data_dmat);
 849 }
 850
 851 static int
 852 iwi_shutdown(device_t dev)
 853 {
 854         struct iwi_softc *sc = device_get_softc(dev);
 855
 856         iwi_stop(sc);
 857         iwi_put_firmware(sc);           /* ??? XXX */
 858
 859         return 0;
 860 }
 861
 862 static int
 863 iwi_suspend(device_t dev)
 864 {
 865         struct iwi_softc *sc = device_get_softc(dev);
 866         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
 867
 868         ieee80211_suspend_all(ic);
 869         return 0;
 870 }
 871
 872 static int
 873 iwi_resume(device_t dev)
 874 {
 875         struct iwi_softc *sc = device_get_softc(dev);
 876         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
 877
 878         pci_write_config(dev, 0x41, 0, 1);
 879
 880         ieee80211_resume_all(ic);
 881         return 0;
 882 }
 883
 884 static struct ieee80211_node *
 885 iwi_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN])
 886 {
 887         struct iwi_node *in;
 888
 889         in = malloc(sizeof (struct iwi_node), M_80211_NODE, M_NOWAIT | M_ZERO);
 890         if (in == NULL)
 891                 return NULL;
 892         /* XXX assign sta table entry for adhoc */
 893         in->in_station = -1;
 894
 895         return &in->in_node;
 896 }
 897
 898 static void
 899 iwi_node_free(struct ieee80211_node *ni)
 900 {
 901         struct ieee80211com *ic = ni->ni_ic;
 902         struct iwi_softc *sc = ic->ic_ifp->if_softc;
 903         struct iwi_node *in = (struct iwi_node *)ni;
 904
 905         if (in->in_station != -1) {
 906                 DPRINTF(("%s mac %6D station %u\n", __func__,
 907                     ni->ni_macaddr, ":", in->in_station));
 908                 free_unr(sc->sc_unr, in->in_station);
 909         }
 910
 911         sc->sc_node_free(ni);
 912 }
 913
 914 /*
 915  * Convert h/w rate code to IEEE rate code.
 916  */
 917 static int
 918 iwi_cvtrate(int iwirate)
 919 {
 920         switch (iwirate) {
 921         case IWI_RATE_DS1:      return 2;
 922         case IWI_RATE_DS2:      return 4;
 923         case IWI_RATE_DS5:      return 11;
 924         case IWI_RATE_DS11:     return 22;
 925         case IWI_RATE_OFDM6:    return 12;
 926         case IWI_RATE_OFDM9:    return 18;
 927         case IWI_RATE_OFDM12:   return 24;
 928         case IWI_RATE_OFDM18:   return 36;
 929         case IWI_RATE_OFDM24:   return 48;
 930         case IWI_RATE_OFDM36:   return 72;
 931         case IWI_RATE_OFDM48:   return 96;
 932         case IWI_RATE_OFDM54:   return 108;
 933         }
 934         return 0;
 935 }
 936
 937 /*
 938  * The firmware automatically adapts the transmit speed.  We report its current
 939  * value here.
 940  */
 941 static void
 942 iwi_media_status(struct ifnet *ifp, struct ifmediareq *imr)
 943 {
 944         struct ieee80211vap *vap = ifp->if_softc;
 945         struct ieee80211com *ic = vap->iv_ic;
 946         struct iwi_softc *sc = ic->ic_ifp->if_softc;
 947
 948         /* read current transmission rate from adapter */
 949         vap->iv_bss->ni_txrate =
 950             iwi_cvtrate(CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE));
 951         ieee80211_media_status(ifp, imr);
 952 }
 953
 954 static int
 955 iwi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 956 {
 957         struct iwi_vap *ivp = IWI_VAP(vap);
 958         struct ieee80211com *ic = vap->iv_ic;
 959         struct ifnet *ifp = ic->ic_ifp;
 960         struct iwi_softc *sc = ifp->if_softc;
 961         IWI_LOCK_DECL;
 962
 963         DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__,
 964                 ieee80211_state_name[vap->iv_state],
 965                 ieee80211_state_name[nstate], sc->flags));
 966
 967         IEEE80211_UNLOCK(ic);
 968         IWI_LOCK(sc);
 969         switch (nstate) {
 970         case IEEE80211_S_INIT:
 971                 /*
 972                  * NB: don't try to do this if iwi_stop_master has
 973                  *     shutdown the firmware and disabled interrupts.
 974                  */
 975                 if (vap->iv_state == IEEE80211_S_RUN &&
 976                     (sc->flags & IWI_FLAG_FW_INITED))
 977                         iwi_disassociate(sc, 0);
 978                 break;
 979         case IEEE80211_S_AUTH:
 980                 iwi_auth_and_assoc(sc, vap);
 981                 break;
 982         case IEEE80211_S_RUN:
 983                 if (vap->iv_opmode == IEEE80211_M_IBSS &&
 984                     vap->iv_state == IEEE80211_S_SCAN) {
 985                         /*
 986                          * XXX when joining an ibss network we are called
 987                          * with a SCAN -> RUN transition on scan complete.
 988                          * Use that to call iwi_auth_and_assoc.  On completing
 989                          * the join we are then called again with an
 990                          * AUTH -> RUN transition and we want to do nothing.
 991                          * This is all totally bogus and needs to be redone.
 992                          */
 993                         iwi_auth_and_assoc(sc, vap);
 994                 } else if (vap->iv_opmode == IEEE80211_M_MONITOR)
 995                         ieee80211_runtask(ic, &sc->sc_monitortask);
 996                 break;
 997         case IEEE80211_S_ASSOC:
 998                 /*
 999                  * If we are transitioning from AUTH then just wait
1000                  * for the ASSOC status to come back from the firmware.
1001                  * Otherwise we need to issue the association request.
1002                  */
1003                 if (vap->iv_state == IEEE80211_S_AUTH)
1004                         break;
1005                 iwi_auth_and_assoc(sc, vap);
1006                 break;
1007         default:
1008                 break;
1009         }
1010         IWI_UNLOCK(sc);
1011         IEEE80211_LOCK(ic);
1012         return ivp->iwi_newstate(vap, nstate, arg);
1013 }
1014
1015 /*
1016  * WME parameters coming from IEEE 802.11e specification.  These values are
1017  * already declared in ieee80211_proto.c, but they are static so they can't
1018  * be reused here.
1019  */
1020 static const struct wmeParams iwi_wme_cck_params[WME_NUM_AC] = {
1021         { 0, 3, 5,  7,   0 },   /* WME_AC_BE */
1022         { 0, 3, 5, 10,   0 },   /* WME_AC_BK */
1023         { 0, 2, 4,  5, 188 },   /* WME_AC_VI */
1024         { 0, 2, 3,  4, 102 }    /* WME_AC_VO */
1025 };
1026
1027 static const struct wmeParams iwi_wme_ofdm_params[WME_NUM_AC] = {
1028         { 0, 3, 4,  6,   0 },   /* WME_AC_BE */
1029         { 0, 3, 4, 10,   0 },   /* WME_AC_BK */
1030         { 0, 2, 3,  4,  94 },   /* WME_AC_VI */
1031         { 0, 2, 2,  3,  47 }    /* WME_AC_VO */
1032 };
1033 #define IWI_EXP2(v)     htole16((1 << (v)) - 1)
1034 #define IWI_USEC(v)     htole16(IEEE80211_TXOP_TO_US(v))
1035
1036 static void
1037 iwi_wme_init(struct iwi_softc *sc)
1038 {
1039         const struct wmeParams *wmep;
1040         int ac;
1041
1042         memset(sc->wme, 0, sizeof sc->wme);
1043         for (ac = 0; ac < WME_NUM_AC; ac++) {
1044                 /* set WME values for CCK modulation */
1045                 wmep = &iwi_wme_cck_params[ac];
1046                 sc->wme[1].aifsn[ac] = wmep->wmep_aifsn;
1047                 sc->wme[1].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1048                 sc->wme[1].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1049                 sc->wme[1].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1050                 sc->wme[1].acm[ac]   = wmep->wmep_acm;
1051
1052                 /* set WME values for OFDM modulation */
1053                 wmep = &iwi_wme_ofdm_params[ac];
1054                 sc->wme[2].aifsn[ac] = wmep->wmep_aifsn;
1055                 sc->wme[2].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1056                 sc->wme[2].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1057                 sc->wme[2].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1058                 sc->wme[2].acm[ac]   = wmep->wmep_acm;
1059         }
1060 }
1061
1062 static int
1063 iwi_wme_setparams(struct iwi_softc *sc, struct ieee80211com *ic)
1064 {
1065         const struct wmeParams *wmep;
1066         int ac;
1067
1068         for (ac = 0; ac < WME_NUM_AC; ac++) {
1069                 /* set WME values for current operating mode */
1070                 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac];
1071                 sc->wme[0].aifsn[ac] = wmep->wmep_aifsn;
1072                 sc->wme[0].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1073                 sc->wme[0].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1074                 sc->wme[0].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1075                 sc->wme[0].acm[ac]   = wmep->wmep_acm;
1076         }
1077
1078         DPRINTF(("Setting WME parameters\n"));
1079         return iwi_cmd(sc, IWI_CMD_SET_WME_PARAMS, sc->wme, sizeof sc->wme);
1080 }
1081 #undef IWI_USEC
1082 #undef IWI_EXP2
1083
1084 static void
1085 iwi_update_wme(void *arg, int npending)
1086 {
1087         struct ieee80211com *ic = arg;
1088         struct iwi_softc *sc = ic->ic_ifp->if_softc;
1089         IWI_LOCK_DECL;
1090
1091         IWI_LOCK(sc);
1092         (void) iwi_wme_setparams(sc, ic);
1093         IWI_UNLOCK(sc);
1094 }
1095
1096 static int
1097 iwi_wme_update(struct ieee80211com *ic)
1098 {
1099         struct iwi_softc *sc = ic->ic_ifp->if_softc;
1100         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1101
1102         /*
1103          * We may be called to update the WME parameters in
1104          * the adapter at various places.  If we're already
1105          * associated then initiate the request immediately;
1106          * otherwise we assume the params will get sent down
1107          * to the adapter as part of the work iwi_auth_and_assoc
1108          * does.
1109          */
1110         if (vap->iv_state == IEEE80211_S_RUN)
1111                 ieee80211_runtask(ic, &sc->sc_wmetask);
1112         return (0);
1113 }
1114
1115 static int
1116 iwi_wme_setie(struct iwi_softc *sc)
1117 {
1118         struct ieee80211_wme_info wme;
1119
1120         memset(&wme, 0, sizeof wme);
1121         wme.wme_id = IEEE80211_ELEMID_VENDOR;
1122         wme.wme_len = sizeof (struct ieee80211_wme_info) - 2;
1123         wme.wme_oui[0] = 0x00;
1124         wme.wme_oui[1] = 0x50;
1125         wme.wme_oui[2] = 0xf2;
1126         wme.wme_type = WME_OUI_TYPE;
1127         wme.wme_subtype = WME_INFO_OUI_SUBTYPE;
1128         wme.wme_version = WME_VERSION;
1129         wme.wme_info = 0;
1130
1131         DPRINTF(("Setting WME IE (len=%u)\n", wme.wme_len));
1132         return iwi_cmd(sc, IWI_CMD_SET_WMEIE, &wme, sizeof wme);
1133 }
1134
1135 /*
1136  * Read 16 bits at address 'addr' from the serial EEPROM.
1137  */
1138 static uint16_t
1139 iwi_read_prom_word(struct iwi_softc *sc, uint8_t addr)
1140 {
1141         uint32_t tmp;
1142         uint16_t val;
1143         int n;
1144
1145         /* clock C once before the first command */
1146         IWI_EEPROM_CTL(sc, 0);
1147         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1148         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1149         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1150
1151         /* write start bit (1) */
1152         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1153         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1154
1155         /* write READ opcode (10) */
1156         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1157         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1158         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1159         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1160
1161         /* write address A7-A0 */
1162         for (n = 7; n >= 0; n--) {
1163                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1164                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D));
1165                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1166                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D) | IWI_EEPROM_C);
1167         }
1168
1169         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1170
1171         /* read data Q15-Q0 */
1172         val = 0;
1173         for (n = 15; n >= 0; n--) {
1174                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1175                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1176                 tmp = MEM_READ_4(sc, IWI_MEM_EEPROM_CTL);
1177                 val |= ((tmp & IWI_EEPROM_Q) >> IWI_EEPROM_SHIFT_Q) << n;
1178         }
1179
1180         IWI_EEPROM_CTL(sc, 0);
1181
1182         /* clear Chip Select and clock C */
1183         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1184         IWI_EEPROM_CTL(sc, 0);
1185         IWI_EEPROM_CTL(sc, IWI_EEPROM_C);
1186
1187         return val;
1188 }
1189
1190 static void
1191 iwi_setcurchan(struct iwi_softc *sc, int chan)
1192 {
1193         struct ifnet *ifp = sc->sc_ifp;
1194         struct ieee80211com *ic = ifp->if_l2com;
1195
1196         sc->curchan = chan;
1197         ieee80211_radiotap_chan_change(ic);
1198 }
1199
1200 static void
1201 iwi_frame_intr(struct iwi_softc *sc, struct iwi_rx_data *data, int i,
1202     struct iwi_frame *frame)
1203 {
1204         struct ifnet *ifp = sc->sc_ifp;
1205         struct ieee80211com *ic = ifp->if_l2com;
1206         struct mbuf *mnew, *m;
1207         struct ieee80211_node *ni;
1208         int type, error, framelen;
1209         int8_t rssi, nf;
1210         IWI_LOCK_DECL;
1211
1212         framelen = le16toh(frame->len);
1213         if (framelen < IEEE80211_MIN_LEN || framelen > MCLBYTES) {
1214                 /*
1215                  * XXX >MCLBYTES is bogus as it means the h/w dma'd
1216                  *     out of bounds; need to figure out how to limit
1217                  *     frame size in the firmware
1218                  */
1219                 /* XXX stat */
1220                 DPRINTFN(1,
1221                     ("drop rx frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1222                     le16toh(frame->len), frame->chan, frame->rssi,
1223                     frame->rssi_dbm));
1224                 return;
1225         }
1226
1227         DPRINTFN(5, ("received frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1228             le16toh(frame->len), frame->chan, frame->rssi, frame->rssi_dbm));
1229
1230         if (frame->chan != sc->curchan)
1231                 iwi_setcurchan(sc, frame->chan);
1232
1233         /*
1234          * Try to allocate a new mbuf for this ring element and load it before
1235          * processing the current mbuf. If the ring element cannot be loaded,
1236          * drop the received packet and reuse the old mbuf. In the unlikely
1237          * case that the old mbuf can't be reloaded either, explicitly panic.
1238          */
1239         mnew = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
1240         if (mnew == NULL) {
1241                 ifp->if_ierrors++;
1242                 return;
1243         }
1244
1245         bus_dmamap_unload(sc->rxq.data_dmat, data->map);
1246
1247         error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1248             mtod(mnew, void *), MCLBYTES, iwi_dma_map_addr, &data->physaddr,
1249             0);
1250         if (error != 0) {
1251                 m_freem(mnew);
1252
1253                 /* try to reload the old mbuf */
1254                 error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1255                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
1256                     &data->physaddr, 0);
1257                 if (error != 0) {
1258                         /* very unlikely that it will fail... */
1259                         panic("%s: could not load old rx mbuf",
1260                             device_get_name(sc->sc_dev));
1261                 }
1262                 ifp->if_ierrors++;
1263                 return;
1264         }
1265
1266         /*
1267          * New mbuf successfully loaded, update Rx ring and continue
1268          * processing.
1269          */
1270         m = data->m;
1271         data->m = mnew;
1272         CSR_WRITE_4(sc, data->reg, data->physaddr);
1273
1274         /* finalize mbuf */
1275         m->m_pkthdr.rcvif = ifp;
1276         m->m_pkthdr.len = m->m_len = sizeof (struct iwi_hdr) +
1277             sizeof (struct iwi_frame) + framelen;
1278
1279         m_adj(m, sizeof (struct iwi_hdr) + sizeof (struct iwi_frame));
1280
1281         rssi = frame->rssi_dbm;
1282         nf = -95;
1283         if (ieee80211_radiotap_active(ic)) {
1284                 struct iwi_rx_radiotap_header *tap = &sc->sc_rxtap;
1285
1286                 tap->wr_flags = 0;
1287                 tap->wr_antsignal = rssi;
1288                 tap->wr_antnoise = nf;
1289                 tap->wr_rate = iwi_cvtrate(frame->rate);
1290                 tap->wr_antenna = frame->antenna;
1291         }
1292         IWI_UNLOCK(sc);
1293
1294         ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *));
1295         if (ni != NULL) {
1296                 type = ieee80211_input(ni, m, rssi, nf);
1297                 ieee80211_free_node(ni);
1298         } else
1299                 type = ieee80211_input_all(ic, m, rssi, nf);
1300
1301         IWI_LOCK(sc);
1302         if (sc->sc_softled) {
1303                 /*
1304                  * Blink for any data frame.  Otherwise do a
1305                  * heartbeat-style blink when idle.  The latter
1306                  * is mainly for station mode where we depend on
1307                  * periodic beacon frames to trigger the poll event.
1308                  */
1309                 if (type == IEEE80211_FC0_TYPE_DATA) {
1310                         sc->sc_rxrate = frame->rate;
1311                         iwi_led_event(sc, IWI_LED_RX);
1312                 } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle)
1313                         iwi_led_event(sc, IWI_LED_POLL);
1314         }
1315 }
1316
1317 /*
1318  * Check for an association response frame to see if QoS
1319  * has been negotiated.  We parse just enough to figure
1320  * out if we're supposed to use QoS.  The proper solution
1321  * is to pass the frame up so ieee80211_input can do the
1322  * work but that's made hard by how things currently are
1323  * done in the driver.
1324  */
1325 static void
1326 iwi_checkforqos(struct ieee80211vap *vap,
1327         const struct ieee80211_frame *wh, int len)
1328 {
1329 #define SUBTYPE(wh)     ((wh)->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
1330         const uint8_t *frm, *efrm, *wme;
1331         struct ieee80211_node *ni;
1332         uint16_t capinfo, status, associd;
1333
1334         /* NB: +8 for capinfo, status, associd, and first ie */
1335         if (!(sizeof(*wh)+8 < len && len < IEEE80211_MAX_LEN) ||
1336             SUBTYPE(wh) != IEEE80211_FC0_SUBTYPE_ASSOC_RESP)
1337                 return;
1338         /*
1339          * asresp frame format
1340          *      [2] capability information
1341          *      [2] status
1342          *      [2] association ID
1343          *      [tlv] supported rates
1344          *      [tlv] extended supported rates
1345          *      [tlv] WME
1346          */
1347         frm = (const uint8_t *)&wh[1];
1348         efrm = ((const uint8_t *) wh) + len;
1349
1350         capinfo = le16toh(*(const uint16_t *)frm);
1351         frm += 2;
1352         status = le16toh(*(const uint16_t *)frm);
1353         frm += 2;
1354         associd = le16toh(*(const uint16_t *)frm);
1355         frm += 2;
1356
1357         wme = NULL;
1358         while (efrm - frm > 1) {
1359                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1360                 switch (*frm) {
1361                 case IEEE80211_ELEMID_VENDOR:
1362                         if (iswmeoui(frm))
1363                                 wme = frm;
1364                         break;
1365                 }
1366                 frm += frm[1] + 2;
1367         }
1368
1369         ni = vap->iv_bss;
1370         ni->ni_capinfo = capinfo;
1371         ni->ni_associd = associd & 0x3fff;
1372         if (wme != NULL)
1373                 ni->ni_flags |= IEEE80211_NODE_QOS;
1374         else
1375                 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1376 #undef SUBTYPE
1377 }
1378
1379 /*
1380  * Task queue callbacks for iwi_notification_intr used to avoid LOR's.
1381  */
1382
1383 static void
1384 iwi_notification_intr(struct iwi_softc *sc, struct iwi_notif *notif)
1385 {
1386         struct ifnet *ifp = sc->sc_ifp;
1387         struct ieee80211com *ic = ifp->if_l2com;
1388         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1389         struct iwi_notif_scan_channel *chan;
1390         struct iwi_notif_scan_complete *scan;
1391         struct iwi_notif_authentication *auth;
1392         struct iwi_notif_association *assoc;
1393         struct iwi_notif_beacon_state *beacon;
1394
1395         switch (notif->type) {
1396         case IWI_NOTIF_TYPE_SCAN_CHANNEL:
1397                 chan = (struct iwi_notif_scan_channel *)(notif + 1);
1398
1399                 DPRINTFN(3, ("Scan of channel %u complete (%u)\n",
1400                     ieee80211_ieee2mhz(chan->nchan, 0), chan->nchan));
1401
1402                 /* Reset the timer, the scan is still going */
1403                 sc->sc_state_timer = 3;
1404                 break;
1405
1406         case IWI_NOTIF_TYPE_SCAN_COMPLETE:
1407                 scan = (struct iwi_notif_scan_complete *)(notif + 1);
1408
1409                 DPRINTFN(2, ("Scan completed (%u, %u)\n", scan->nchan,
1410                     scan->status));
1411
1412                 IWI_STATE_END(sc, IWI_FW_SCANNING);
1413
1414                 /*
1415                  * Monitor mode works by doing a passive scan to set
1416                  * the channel and enable rx.  Because we don't want
1417                  * to abort a scan lest the firmware crash we scan
1418                  * for a short period of time and automatically restart
1419                  * the scan when notified the sweep has completed.
1420                  */
1421                 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
1422                         ieee80211_runtask(ic, &sc->sc_monitortask);
1423                         break;
1424                 }
1425
1426                 if (scan->status == IWI_SCAN_COMPLETED) {
1427                         /* NB: don't need to defer, net80211 does it for us */
1428                         ieee80211_scan_next(vap);
1429                 }
1430                 break;
1431
1432         case IWI_NOTIF_TYPE_AUTHENTICATION:
1433                 auth = (struct iwi_notif_authentication *)(notif + 1);
1434                 switch (auth->state) {
1435                 case IWI_AUTH_SUCCESS:
1436                         DPRINTFN(2, ("Authentication succeeeded\n"));
1437                         ieee80211_new_state(vap, IEEE80211_S_ASSOC, -1);
1438                         break;
1439                 case IWI_AUTH_FAIL:
1440                         /*
1441                          * These are delivered as an unsolicited deauth
1442                          * (e.g. due to inactivity) or in response to an
1443                          * associate request.
1444                          */
1445                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1446                         if (vap->iv_state != IEEE80211_S_RUN) {
1447                                 DPRINTFN(2, ("Authentication failed\n"));
1448                                 vap->iv_stats.is_rx_auth_fail++;
1449                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1450                         } else {
1451                                 DPRINTFN(2, ("Deauthenticated\n"));
1452                                 vap->iv_stats.is_rx_deauth++;
1453                         }
1454                         ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1455                         break;
1456                 case IWI_AUTH_SENT_1:
1457                 case IWI_AUTH_RECV_2:
1458                 case IWI_AUTH_SEQ1_PASS:
1459                         break;
1460                 case IWI_AUTH_SEQ1_FAIL:
1461                         DPRINTFN(2, ("Initial authentication handshake failed; "
1462                                 "you probably need shared key\n"));
1463                         vap->iv_stats.is_rx_auth_fail++;
1464                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1465                         /* XXX retry shared key when in auto */
1466                         break;
1467                 default:
1468                         device_printf(sc->sc_dev,
1469                             "unknown authentication state %u\n", auth->state);
1470                         break;
1471                 }
1472                 break;
1473
1474         case IWI_NOTIF_TYPE_ASSOCIATION:
1475                 assoc = (struct iwi_notif_association *)(notif + 1);
1476                 switch (assoc->state) {
1477                 case IWI_AUTH_SUCCESS:
1478                         /* re-association, do nothing */
1479                         break;
1480                 case IWI_ASSOC_SUCCESS:
1481                         DPRINTFN(2, ("Association succeeded\n"));
1482                         sc->flags |= IWI_FLAG_ASSOCIATED;
1483                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1484                         iwi_checkforqos(vap,
1485                             (const struct ieee80211_frame *)(assoc+1),
1486                             le16toh(notif->len) - sizeof(*assoc) - 1);
1487                         ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
1488                         break;
1489                 case IWI_ASSOC_INIT:
1490                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1491                         switch (sc->fw_state) {
1492                         case IWI_FW_ASSOCIATING:
1493                                 DPRINTFN(2, ("Association failed\n"));
1494                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1495                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1496                                 break;
1497
1498                         case IWI_FW_DISASSOCIATING:
1499                                 DPRINTFN(2, ("Dissassociated\n"));
1500                                 IWI_STATE_END(sc, IWI_FW_DISASSOCIATING);
1501                                 vap->iv_stats.is_rx_disassoc++;
1502                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1503                                 break;
1504                         }
1505                         break;
1506                 default:
1507                         device_printf(sc->sc_dev,
1508                             "unknown association state %u\n", assoc->state);
1509                         break;
1510                 }
1511                 break;
1512
1513         case IWI_NOTIF_TYPE_BEACON:
1514                 /* XXX check struct length */
1515                 beacon = (struct iwi_notif_beacon_state *)(notif + 1);
1516
1517                 DPRINTFN(5, ("Beacon state (%u, %u)\n",
1518                     beacon->state, le32toh(beacon->number)));
1519
1520                 if (beacon->state == IWI_BEACON_MISS) {
1521                         /*
1522                          * The firmware notifies us of every beacon miss
1523                          * so we need to track the count against the
1524                          * configured threshold before notifying the
1525                          * 802.11 layer.
1526                          * XXX try to roam, drop assoc only on much higher count
1527                          */
1528                         if (le32toh(beacon->number) >= vap->iv_bmissthreshold) {
1529                                 DPRINTF(("Beacon miss: %u >= %u\n",
1530                                     le32toh(beacon->number),
1531                                     vap->iv_bmissthreshold));
1532                                 vap->iv_stats.is_beacon_miss++;
1533                                 /*
1534                                  * It's pointless to notify the 802.11 layer
1535                                  * as it'll try to send a probe request (which
1536                                  * we'll discard) and then timeout and drop us
1537                                  * into scan state.  Instead tell the firmware
1538                                  * to disassociate and then on completion we'll
1539                                  * kick the state machine to scan.
1540                                  */
1541                                 ieee80211_runtask(ic, &sc->sc_disassoctask);
1542                         }
1543                 }
1544                 break;
1545
1546         case IWI_NOTIF_TYPE_CALIBRATION:
1547         case IWI_NOTIF_TYPE_NOISE:
1548         case IWI_NOTIF_TYPE_LINK_QUALITY:
1549                 DPRINTFN(5, ("Notification (%u)\n", notif->type));
1550                 break;
1551
1552         default:
1553                 DPRINTF(("unknown notification type %u flags 0x%x len %u\n",
1554                     notif->type, notif->flags, le16toh(notif->len)));
1555                 break;
1556         }
1557 }
1558
1559 static void
1560 iwi_rx_intr(struct iwi_softc *sc)
1561 {
1562         struct iwi_rx_data *data;
1563         struct iwi_hdr *hdr;
1564         uint32_t hw;
1565
1566         hw = CSR_READ_4(sc, IWI_CSR_RX_RIDX);
1567
1568         for (; sc->rxq.cur != hw;) {
1569                 data = &sc->rxq.data[sc->rxq.cur];
1570
1571                 bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1572                     BUS_DMASYNC_POSTREAD);
1573
1574                 hdr = mtod(data->m, struct iwi_hdr *);
1575
1576                 switch (hdr->type) {
1577                 case IWI_HDR_TYPE_FRAME:
1578                         iwi_frame_intr(sc, data, sc->rxq.cur,
1579                             (struct iwi_frame *)(hdr + 1));
1580                         break;
1581
1582                 case IWI_HDR_TYPE_NOTIF:
1583                         iwi_notification_intr(sc,
1584                             (struct iwi_notif *)(hdr + 1));
1585                         break;
1586
1587                 default:
1588                         device_printf(sc->sc_dev, "unknown hdr type %u\n",
1589                             hdr->type);
1590                 }
1591
1592                 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur));
1593
1594                 sc->rxq.cur = (sc->rxq.cur + 1) % IWI_RX_RING_COUNT;
1595         }
1596
1597         /* tell the firmware what we have processed */
1598         hw = (hw == 0) ? IWI_RX_RING_COUNT - 1 : hw - 1;
1599         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, hw);
1600 }
1601
1602 static void
1603 iwi_tx_intr(struct iwi_softc *sc, struct iwi_tx_ring *txq)
1604 {
1605         struct ifnet *ifp = sc->sc_ifp;
1606         struct iwi_tx_data *data;
1607         uint32_t hw;
1608
1609         hw = CSR_READ_4(sc, txq->csr_ridx);
1610
1611         for (; txq->next != hw;) {
1612                 data = &txq->data[txq->next];
1613
1614                 bus_dmamap_sync(txq->data_dmat, data->map,
1615                     BUS_DMASYNC_POSTWRITE);
1616                 bus_dmamap_unload(txq->data_dmat, data->map);
1617                 if (data->m->m_flags & M_TXCB)
1618                         ieee80211_process_callback(data->ni, data->m, 0/*XXX*/);
1619                 m_freem(data->m);
1620                 data->m = NULL;
1621                 ieee80211_free_node(data->ni);
1622                 data->ni = NULL;
1623
1624                 DPRINTFN(15, ("tx done idx=%u\n", txq->next));
1625
1626                 ifp->if_opackets++;
1627
1628                 txq->queued--;
1629                 txq->next = (txq->next + 1) % IWI_TX_RING_COUNT;
1630         }
1631
1632         sc->sc_tx_timer = 0;
1633         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1634
1635         if (sc->sc_softled)
1636                 iwi_led_event(sc, IWI_LED_TX);
1637
1638         iwi_start_locked(ifp);
1639 }
1640
1641 static void
1642 iwi_fatal_error_intr(struct iwi_softc *sc)
1643 {
1644         struct ifnet *ifp = sc->sc_ifp;
1645         struct ieee80211com *ic = ifp->if_l2com;
1646         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1647
1648         device_printf(sc->sc_dev, "firmware error\n");
1649         if (vap != NULL)
1650                 ieee80211_cancel_scan(vap);
1651         ieee80211_runtask(ic, &sc->sc_restarttask);
1652
1653         sc->flags &= ~IWI_FLAG_BUSY;
1654         sc->sc_busy_timer = 0;
1655         wakeup(sc);
1656 }
1657
1658 static void
1659 iwi_radio_off_intr(struct iwi_softc *sc)
1660 {
1661         struct ifnet *ifp = sc->sc_ifp;
1662         struct ieee80211com *ic = ifp->if_l2com;
1663
1664         ieee80211_runtask(ic, &sc->sc_radiofftask);
1665 }
1666
1667 static void
1668 iwi_intr(void *arg)
1669 {
1670         struct iwi_softc *sc = arg;
1671         uint32_t r;
1672         IWI_LOCK_DECL;
1673
1674         IWI_LOCK(sc);
1675
1676         if ((r = CSR_READ_4(sc, IWI_CSR_INTR)) == 0 || r == 0xffffffff) {
1677                 IWI_UNLOCK(sc);
1678                 return;
1679         }
1680
1681         /* acknowledge interrupts */
1682         CSR_WRITE_4(sc, IWI_CSR_INTR, r);
1683
1684         if (r & IWI_INTR_FATAL_ERROR) {
1685                 iwi_fatal_error_intr(sc);
1686                 goto done;
1687         }
1688
1689         if (r & IWI_INTR_FW_INITED) {
1690                 if (!(r & (IWI_INTR_FATAL_ERROR | IWI_INTR_PARITY_ERROR)))
1691                         wakeup(sc);
1692         }
1693
1694         if (r & IWI_INTR_RADIO_OFF)
1695                 iwi_radio_off_intr(sc);
1696
1697         if (r & IWI_INTR_CMD_DONE) {
1698                 sc->flags &= ~IWI_FLAG_BUSY;
1699                 sc->sc_busy_timer = 0;
1700                 wakeup(sc);
1701         }
1702
1703         if (r & IWI_INTR_TX1_DONE)
1704                 iwi_tx_intr(sc, &sc->txq[0]);
1705
1706         if (r & IWI_INTR_TX2_DONE)
1707                 iwi_tx_intr(sc, &sc->txq[1]);
1708
1709         if (r & IWI_INTR_TX3_DONE)
1710                 iwi_tx_intr(sc, &sc->txq[2]);
1711
1712         if (r & IWI_INTR_TX4_DONE)
1713                 iwi_tx_intr(sc, &sc->txq[3]);
1714
1715         if (r & IWI_INTR_RX_DONE)
1716                 iwi_rx_intr(sc);
1717
1718         if (r & IWI_INTR_PARITY_ERROR) {
1719                 /* XXX rate-limit */
1720                 device_printf(sc->sc_dev, "parity error\n");
1721         }
1722 done:
1723         IWI_UNLOCK(sc);
1724 }
1725
1726 static int
1727 iwi_cmd(struct iwi_softc *sc, uint8_t type, void *data, uint8_t len)
1728 {
1729         struct iwi_cmd_desc *desc;
1730
1731         IWI_LOCK_ASSERT(sc);
1732
1733         if (sc->flags & IWI_FLAG_BUSY) {
1734                 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n",
1735                         __func__, type);
1736                 return EAGAIN;
1737         }
1738         sc->flags |= IWI_FLAG_BUSY;
1739         sc->sc_busy_timer = 2;
1740
1741         desc = &sc->cmdq.desc[sc->cmdq.cur];
1742
1743         desc->hdr.type = IWI_HDR_TYPE_COMMAND;
1744         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1745         desc->type = type;
1746         desc->len = len;
1747         memcpy(desc->data, data, len);
1748
1749         bus_dmamap_sync(sc->cmdq.desc_dmat, sc->cmdq.desc_map,
1750             BUS_DMASYNC_PREWRITE);
1751
1752         DPRINTFN(2, ("sending command idx=%u type=%u len=%u\n", sc->cmdq.cur,
1753             type, len));
1754
1755         sc->cmdq.cur = (sc->cmdq.cur + 1) % IWI_CMD_RING_COUNT;
1756         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
1757
1758         return msleep(sc, &sc->sc_mtx, 0, "iwicmd", hz);
1759 }
1760
1761 static void
1762 iwi_write_ibssnode(struct iwi_softc *sc,
1763         const u_int8_t addr[IEEE80211_ADDR_LEN], int entry)
1764 {
1765         struct iwi_ibssnode node;
1766
1767         /* write node information into NIC memory */
1768         memset(&node, 0, sizeof node);
1769         IEEE80211_ADDR_COPY(node.bssid, addr);
1770
1771         DPRINTF(("%s mac %6D station %u\n", __func__, node.bssid, ":", entry));
1772
1773         CSR_WRITE_REGION_1(sc,
1774             IWI_CSR_NODE_BASE + entry * sizeof node,
1775             (uint8_t *)&node, sizeof node);
1776 }
1777
1778 static int
1779 iwi_tx_start(struct ifnet *ifp, struct mbuf *m0, struct ieee80211_node *ni,
1780     int ac)
1781 {
1782         struct iwi_softc *sc = ifp->if_softc;
1783         struct ieee80211vap *vap = ni->ni_vap;
1784         struct ieee80211com *ic = ni->ni_ic;
1785         struct iwi_node *in = (struct iwi_node *)ni;
1786         const struct ieee80211_frame *wh;
1787         struct ieee80211_key *k;
1788         const struct chanAccParams *cap;
1789         struct iwi_tx_ring *txq = &sc->txq[ac];
1790         struct iwi_tx_data *data;
1791         struct iwi_tx_desc *desc;
1792         struct mbuf *mnew;
1793         bus_dma_segment_t segs[IWI_MAX_NSEG];
1794         int error, nsegs, hdrlen, i;
1795         int ismcast, flags, xflags, staid;
1796
1797         IWI_LOCK_ASSERT(sc);
1798         wh = mtod(m0, const struct ieee80211_frame *);
1799         /* NB: only data frames use this path */
1800         hdrlen = ieee80211_hdrsize(wh);
1801         ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1802         flags = xflags = 0;
1803
1804         if (!ismcast)
1805                 flags |= IWI_DATA_FLAG_NEED_ACK;
1806         if (vap->iv_flags & IEEE80211_F_SHPREAMBLE)
1807                 flags |= IWI_DATA_FLAG_SHPREAMBLE;
1808         if (IEEE80211_QOS_HAS_SEQ(wh)) {
1809                 xflags |= IWI_DATA_XFLAG_QOS;
1810                 cap = &ic->ic_wme.wme_chanParams;
1811                 if (!cap->cap_wmeParams[ac].wmep_noackPolicy)
1812                         flags &= ~IWI_DATA_FLAG_NEED_ACK;
1813         }
1814
1815         /*
1816          * This is only used in IBSS mode where the firmware expect an index
1817          * in a h/w table instead of a destination address.
1818          */
1819         if (vap->iv_opmode == IEEE80211_M_IBSS) {
1820                 if (!ismcast) {
1821                         if (in->in_station == -1) {
1822                                 in->in_station = alloc_unr(sc->sc_unr);
1823                                 if (in->in_station == -1) {
1824                                         /* h/w table is full */
1825                                         m_freem(m0);
1826                                         ieee80211_free_node(ni);
1827                                         ifp->if_oerrors++;
1828                                         return 0;
1829                                 }
1830                                 iwi_write_ibssnode(sc,
1831                                         ni->ni_macaddr, in->in_station);
1832                         }
1833                         staid = in->in_station;
1834                 } else {
1835                         /*
1836                          * Multicast addresses have no associated node
1837                          * so there will be no station entry.  We reserve
1838                          * entry 0 for one mcast address and use that.
1839                          * If there are many being used this will be
1840                          * expensive and we'll need to do a better job
1841                          * but for now this handles the broadcast case.
1842                          */
1843                         if (!IEEE80211_ADDR_EQ(wh->i_addr1, sc->sc_mcast)) {
1844                                 IEEE80211_ADDR_COPY(sc->sc_mcast, wh->i_addr1);
1845                                 iwi_write_ibssnode(sc, sc->sc_mcast, 0);
1846                         }
1847                         staid = 0;
1848                 }
1849         } else
1850                 staid = 0;
1851
1852         if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1853                 k = ieee80211_crypto_encap(ni, m0);
1854                 if (k == NULL) {
1855                         m_freem(m0);
1856                         return ENOBUFS;
1857                 }
1858
1859                 /* packet header may have moved, reset our local pointer */
1860                 wh = mtod(m0, struct ieee80211_frame *);
1861         }
1862
1863         if (ieee80211_radiotap_active_vap(vap)) {
1864                 struct iwi_tx_radiotap_header *tap = &sc->sc_txtap;
1865
1866                 tap->wt_flags = 0;
1867
1868                 ieee80211_radiotap_tx(vap, m0);
1869         }
1870
1871         data = &txq->data[txq->cur];
1872         desc = &txq->desc[txq->cur];
1873
1874         /* save and trim IEEE802.11 header */
1875         m_copydata(m0, 0, hdrlen, (caddr_t)&desc->wh);
1876         m_adj(m0, hdrlen);
1877
1878         error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, segs,
1879             &nsegs, 0);
1880         if (error != 0 && error != EFBIG) {
1881                 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1882                     error);
1883                 m_freem(m0);
1884                 return error;
1885         }
1886         if (error != 0) {
1887                 mnew = m_defrag(m0, M_NOWAIT);
1888                 if (mnew == NULL) {
1889                         device_printf(sc->sc_dev,
1890                             "could not defragment mbuf\n");
1891                         m_freem(m0);
1892                         return ENOBUFS;
1893                 }
1894                 m0 = mnew;
1895
1896                 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map,
1897                     m0, segs, &nsegs, 0);
1898                 if (error != 0) {
1899                         device_printf(sc->sc_dev,
1900                             "could not map mbuf (error %d)\n", error);
1901                         m_freem(m0);
1902                         return error;
1903                 }
1904         }
1905
1906         data->m = m0;
1907         data->ni = ni;
1908
1909         desc->hdr.type = IWI_HDR_TYPE_DATA;
1910         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1911         desc->station = staid;
1912         desc->cmd = IWI_DATA_CMD_TX;
1913         desc->len = htole16(m0->m_pkthdr.len);
1914         desc->flags = flags;
1915         desc->xflags = xflags;
1916
1917 #if 0
1918         if (vap->iv_flags & IEEE80211_F_PRIVACY)
1919                 desc->wep_txkey = vap->iv_def_txkey;
1920         else
1921 #endif
1922                 desc->flags |= IWI_DATA_FLAG_NO_WEP;
1923
1924         desc->nseg = htole32(nsegs);
1925         for (i = 0; i < nsegs; i++) {
1926                 desc->seg_addr[i] = htole32(segs[i].ds_addr);
1927                 desc->seg_len[i]  = htole16(segs[i].ds_len);
1928         }
1929
1930         bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1931         bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE);
1932
1933         DPRINTFN(5, ("sending data frame txq=%u idx=%u len=%u nseg=%u\n",
1934             ac, txq->cur, le16toh(desc->len), nsegs));
1935
1936         txq->queued++;
1937         txq->cur = (txq->cur + 1) % IWI_TX_RING_COUNT;
1938         CSR_WRITE_4(sc, txq->csr_widx, txq->cur);
1939
1940         return 0;
1941 }
1942
1943 static int
1944 iwi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
1945         const struct ieee80211_bpf_params *params)
1946 {
1947         /* no support; just discard */
1948         m_freem(m);
1949         ieee80211_free_node(ni);
1950         return 0;
1951 }
1952
1953 static void
1954 iwi_start_locked(struct ifnet *ifp)
1955 {
1956         struct iwi_softc *sc = ifp->if_softc;
1957         struct mbuf *m;
1958         struct ieee80211_node *ni;
1959         int ac;
1960
1961         IWI_LOCK_ASSERT(sc);
1962
1963         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1964                 return;
1965
1966         for (;;) {
1967                 IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
1968                 if (m == NULL)
1969                         break;
1970                 ac = M_WME_GETAC(m);
1971                 if (sc->txq[ac].queued > IWI_TX_RING_COUNT - 8) {
1972                         /* there is no place left in this ring; tail drop */
1973                         /* XXX tail drop */
1974                         IFQ_DRV_PREPEND(&ifp->if_snd, m);
1975                         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
1976                         break;
1977                 }
1978
1979                 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
1980                 if (iwi_tx_start(ifp, m, ni, ac) != 0) {
1981                         ieee80211_free_node(ni);
1982                         ifp->if_oerrors++;
1983                         break;
1984                 }
1985
1986                 sc->sc_tx_timer = 5;
1987         }
1988 }
1989
1990 static void
1991 iwi_start(struct ifnet *ifp)
1992 {
1993         struct iwi_softc *sc = ifp->if_softc;
1994         IWI_LOCK_DECL;
1995
1996         IWI_LOCK(sc);
1997         iwi_start_locked(ifp);
1998         IWI_UNLOCK(sc);
1999 }
2000
2001 static void
2002 iwi_watchdog(void *arg)
2003 {
2004         struct iwi_softc *sc = arg;
2005         struct ifnet *ifp = sc->sc_ifp;
2006         struct ieee80211com *ic = ifp->if_l2com;
2007
2008         IWI_LOCK_ASSERT(sc);
2009
2010         if (sc->sc_tx_timer > 0) {
2011                 if (--sc->sc_tx_timer == 0) {
2012                         if_printf(ifp, "device timeout\n");
2013                         ifp->if_oerrors++;
2014                         ieee80211_runtask(ic, &sc->sc_restarttask);
2015                 }
2016         }
2017         if (sc->sc_state_timer > 0) {
2018                 if (--sc->sc_state_timer == 0) {
2019                         if_printf(ifp, "firmware stuck in state %d, resetting\n",
2020                             sc->fw_state);
2021                         if (sc->fw_state == IWI_FW_SCANNING) {
2022                                 struct ieee80211com *ic = ifp->if_l2com;
2023                                 ieee80211_cancel_scan(TAILQ_FIRST(&ic->ic_vaps));
2024                         }
2025                         ieee80211_runtask(ic, &sc->sc_restarttask);
2026                         sc->sc_state_timer = 3;
2027                 }
2028         }
2029         if (sc->sc_busy_timer > 0) {
2030                 if (--sc->sc_busy_timer == 0) {
2031                         if_printf(ifp, "firmware command timeout, resetting\n");
2032                         ieee80211_runtask(ic, &sc->sc_restarttask);
2033                 }
2034         }
2035         callout_reset(&sc->sc_wdtimer, hz, iwi_watchdog, sc);
2036 }
2037
2038 static int
2039 iwi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
2040 {
2041         struct iwi_softc *sc = ifp->if_softc;
2042         struct ieee80211com *ic = ifp->if_l2com;
2043         struct ifreq *ifr = (struct ifreq *) data;
2044         int error = 0, startall = 0;
2045         IWI_LOCK_DECL;
2046
2047         switch (cmd) {
2048         case SIOCSIFFLAGS:
2049                 IWI_LOCK(sc);
2050                 if (ifp->if_flags & IFF_UP) {
2051                         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2052                                 iwi_init_locked(sc);
2053                                 startall = 1;
2054                         }
2055                 } else {
2056                         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
2057                                 iwi_stop_locked(sc);
2058                 }
2059                 IWI_UNLOCK(sc);
2060                 if (startall)
2061                         ieee80211_start_all(ic);
2062                 break;
2063         case SIOCGIFMEDIA:
2064                 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
2065                 break;
2066         case SIOCGIFADDR:
2067                 error = ether_ioctl(ifp, cmd, data);
2068                 break;
2069         default:
2070                 error = EINVAL;
2071                 break;
2072         }
2073         return error;
2074 }
2075
2076 static void
2077 iwi_stop_master(struct iwi_softc *sc)
2078 {
2079         uint32_t tmp;
2080         int ntries;
2081
2082         /* disable interrupts */
2083         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, 0);
2084
2085         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_STOP_MASTER);
2086         for (ntries = 0; ntries < 5; ntries++) {
2087                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2088                         break;
2089                 DELAY(10);
2090         }
2091         if (ntries == 5)
2092                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2093
2094         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2095         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_PRINCETON_RESET);
2096
2097         sc->flags &= ~IWI_FLAG_FW_INITED;
2098 }
2099
2100 static int
2101 iwi_reset(struct iwi_softc *sc)
2102 {
2103         uint32_t tmp;
2104         int i, ntries;
2105
2106         iwi_stop_master(sc);
2107
2108         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2109         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2110
2111         CSR_WRITE_4(sc, IWI_CSR_READ_INT, IWI_READ_INT_INIT_HOST);
2112
2113         /* wait for clock stabilization */
2114         for (ntries = 0; ntries < 1000; ntries++) {
2115                 if (CSR_READ_4(sc, IWI_CSR_CTL) & IWI_CTL_CLOCK_READY)
2116                         break;
2117                 DELAY(200);
2118         }
2119         if (ntries == 1000) {
2120                 device_printf(sc->sc_dev,
2121                     "timeout waiting for clock stabilization\n");
2122                 return EIO;
2123         }
2124
2125         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2126         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_SOFT_RESET);
2127
2128         DELAY(10);
2129
2130         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2131         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2132
2133         /* clear NIC memory */
2134         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0);
2135         for (i = 0; i < 0xc000; i++)
2136                 CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2137
2138         return 0;
2139 }
2140
2141 static const struct iwi_firmware_ohdr *
2142 iwi_setup_ofw(struct iwi_softc *sc, struct iwi_fw *fw)
2143 {
2144         const struct firmware *fp = fw->fp;
2145         const struct iwi_firmware_ohdr *hdr;
2146
2147         if (fp->datasize < sizeof (struct iwi_firmware_ohdr)) {
2148                 device_printf(sc->sc_dev, "image '%s' too small\n", fp->name);
2149                 return NULL;
2150         }
2151         hdr = (const struct iwi_firmware_ohdr *)fp->data;
2152         if ((IWI_FW_GET_MAJOR(le32toh(hdr->version)) != IWI_FW_REQ_MAJOR) ||
2153             (IWI_FW_GET_MINOR(le32toh(hdr->version)) != IWI_FW_REQ_MINOR)) {
2154                 device_printf(sc->sc_dev, "version for '%s' %d.%d != %d.%d\n",
2155                     fp->name, IWI_FW_GET_MAJOR(le32toh(hdr->version)),
2156                     IWI_FW_GET_MINOR(le32toh(hdr->version)), IWI_FW_REQ_MAJOR,
2157                     IWI_FW_REQ_MINOR);
2158                 return NULL;
2159         }
2160         fw->data = ((const char *) fp->data) + sizeof(struct iwi_firmware_ohdr);
2161         fw->size = fp->datasize - sizeof(struct iwi_firmware_ohdr);
2162         fw->name = fp->name;
2163         return hdr;
2164 }
2165
2166 static const struct iwi_firmware_ohdr *
2167 iwi_setup_oucode(struct iwi_softc *sc, struct iwi_fw *fw)
2168 {
2169         const struct iwi_firmware_ohdr *hdr;
2170
2171         hdr = iwi_setup_ofw(sc, fw);
2172         if (hdr != NULL && le32toh(hdr->mode) != IWI_FW_MODE_UCODE) {
2173                 device_printf(sc->sc_dev, "%s is not a ucode image\n",
2174                     fw->name);
2175                 hdr = NULL;
2176         }
2177         return hdr;
2178 }
2179
2180 static void
2181 iwi_getfw(struct iwi_fw *fw, const char *fwname,
2182           struct iwi_fw *uc, const char *ucname)
2183 {
2184         if (fw->fp == NULL)
2185                 fw->fp = firmware_get(fwname);
2186         /* NB: pre-3.0 ucode is packaged separately */
2187         if (uc->fp == NULL && fw->fp != NULL && fw->fp->version < 300)
2188                 uc->fp = firmware_get(ucname);
2189 }
2190
2191 /*
2192  * Get the required firmware images if not already loaded.
2193  * Note that we hold firmware images so long as the device
2194  * is marked up in case we need to reload them on device init.
2195  * This is necessary because we re-init the device sometimes
2196  * from a context where we cannot read from the filesystem
2197  * (e.g. from the taskqueue thread when rfkill is re-enabled).
2198  * XXX return 0 on success, 1 on error.
2199  *
2200  * NB: the order of get'ing and put'ing images here is
2201  * intentional to support handling firmware images bundled
2202  * by operating mode and/or all together in one file with
2203  * the boot firmware as "master".
2204  */
2205 static int
2206 iwi_get_firmware(struct iwi_softc *sc, enum ieee80211_opmode opmode)
2207 {
2208         const struct iwi_firmware_hdr *hdr;
2209         const struct firmware *fp;
2210
2211         /* invalidate cached firmware on mode change */
2212         if (sc->fw_mode != opmode)
2213                 iwi_put_firmware(sc);
2214
2215         switch (opmode) {
2216         case IEEE80211_M_STA:
2217                 iwi_getfw(&sc->fw_fw, "iwi_bss", &sc->fw_uc, "iwi_ucode_bss");
2218                 break;
2219         case IEEE80211_M_IBSS:
2220                 iwi_getfw(&sc->fw_fw, "iwi_ibss", &sc->fw_uc, "iwi_ucode_ibss");
2221                 break;
2222         case IEEE80211_M_MONITOR:
2223                 iwi_getfw(&sc->fw_fw, "iwi_monitor",
2224                           &sc->fw_uc, "iwi_ucode_monitor");
2225                 break;
2226         default:
2227                 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode);
2228                 return EINVAL;
2229         }
2230         fp = sc->fw_fw.fp;
2231         if (fp == NULL) {
2232                 device_printf(sc->sc_dev, "could not load firmware\n");
2233                 goto bad;
2234         }
2235         if (fp->version < 300) {
2236                 /*
2237                  * Firmware prior to 3.0 was packaged as separate
2238                  * boot, firmware, and ucode images.  Verify the
2239                  * ucode image was read in, retrieve the boot image
2240                  * if needed, and check version stamps for consistency.
2241                  * The version stamps in the data are also checked
2242                  * above; this is a bit paranoid but is a cheap
2243                  * safeguard against mis-packaging.
2244                  */
2245                 if (sc->fw_uc.fp == NULL) {
2246                         device_printf(sc->sc_dev, "could not load ucode\n");
2247                         goto bad;
2248                 }
2249                 if (sc->fw_boot.fp == NULL) {
2250                         sc->fw_boot.fp = firmware_get("iwi_boot");
2251                         if (sc->fw_boot.fp == NULL) {
2252                                 device_printf(sc->sc_dev,
2253                                         "could not load boot firmware\n");
2254                                 goto bad;
2255                         }
2256                 }
2257                 if (sc->fw_boot.fp->version != sc->fw_fw.fp->version ||
2258                     sc->fw_boot.fp->version != sc->fw_uc.fp->version) {
2259                         device_printf(sc->sc_dev,
2260                             "firmware version mismatch: "
2261                             "'%s' is %d, '%s' is %d, '%s' is %d\n",
2262                             sc->fw_boot.fp->name, sc->fw_boot.fp->version,
2263                             sc->fw_uc.fp->name, sc->fw_uc.fp->version,
2264                             sc->fw_fw.fp->name, sc->fw_fw.fp->version
2265                         );
2266                         goto bad;
2267                 }
2268                 /*
2269                  * Check and setup each image.
2270                  */
2271                 if (iwi_setup_oucode(sc, &sc->fw_uc) == NULL ||
2272                     iwi_setup_ofw(sc, &sc->fw_boot) == NULL ||
2273                     iwi_setup_ofw(sc, &sc->fw_fw) == NULL)
2274                         goto bad;
2275         } else {
2276                 /*
2277                  * Check and setup combined image.
2278                  */
2279                 if (fp->datasize < sizeof(struct iwi_firmware_hdr)) {
2280                         device_printf(sc->sc_dev, "image '%s' too small\n",
2281                             fp->name);
2282                         goto bad;
2283                 }
2284                 hdr = (const struct iwi_firmware_hdr *)fp->data;
2285                 if (fp->datasize < sizeof(*hdr) + le32toh(hdr->bsize) + le32toh(hdr->usize)
2286                                 + le32toh(hdr->fsize)) {
2287                         device_printf(sc->sc_dev, "image '%s' too small (2)\n",
2288                             fp->name);
2289                         goto bad;
2290                 }
2291                 sc->fw_boot.data = ((const char *) fp->data) + sizeof(*hdr);
2292                 sc->fw_boot.size = le32toh(hdr->bsize);
2293                 sc->fw_boot.name = fp->name;
2294                 sc->fw_uc.data = sc->fw_boot.data + sc->fw_boot.size;
2295                 sc->fw_uc.size = le32toh(hdr->usize);
2296                 sc->fw_uc.name = fp->name;
2297                 sc->fw_fw.data = sc->fw_uc.data + sc->fw_uc.size;
2298                 sc->fw_fw.size = le32toh(hdr->fsize);
2299                 sc->fw_fw.name = fp->name;
2300         }
2301 #if 0
2302         device_printf(sc->sc_dev, "boot %d ucode %d fw %d bytes\n",
2303                 sc->fw_boot.size, sc->fw_uc.size, sc->fw_fw.size);
2304 #endif
2305
2306         sc->fw_mode = opmode;
2307         return 0;
2308 bad:
2309         iwi_put_firmware(sc);
2310         return 1;
2311 }
2312
2313 static void
2314 iwi_put_fw(struct iwi_fw *fw)
2315 {
2316         if (fw->fp != NULL) {
2317                 firmware_put(fw->fp, FIRMWARE_UNLOAD);
2318                 fw->fp = NULL;
2319         }
2320         fw->data = NULL;
2321         fw->size = 0;
2322         fw->name = NULL;
2323 }
2324
2325 /*
2326  * Release any cached firmware images.
2327  */
2328 static void
2329 iwi_put_firmware(struct iwi_softc *sc)
2330 {
2331         iwi_put_fw(&sc->fw_uc);
2332         iwi_put_fw(&sc->fw_fw);
2333         iwi_put_fw(&sc->fw_boot);
2334 }
2335
2336 static int
2337 iwi_load_ucode(struct iwi_softc *sc, const struct iwi_fw *fw)
2338 {
2339         uint32_t tmp;
2340         const uint16_t *w;
2341         const char *uc = fw->data;
2342         size_t size = fw->size;
2343         int i, ntries, error;
2344
2345         IWI_LOCK_ASSERT(sc);
2346         error = 0;
2347         CSR_WRITE_4(sc, IWI_CSR_RST, CSR_READ_4(sc, IWI_CSR_RST) |
2348             IWI_RST_STOP_MASTER);
2349         for (ntries = 0; ntries < 5; ntries++) {
2350                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2351                         break;
2352                 DELAY(10);
2353         }
2354         if (ntries == 5) {
2355                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2356                 error = EIO;
2357                 goto fail;
2358         }
2359
2360         MEM_WRITE_4(sc, 0x3000e0, 0x80000000);
2361         DELAY(5000);
2362
2363         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2364         tmp &= ~IWI_RST_PRINCETON_RESET;
2365         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2366
2367         DELAY(5000);
2368         MEM_WRITE_4(sc, 0x3000e0, 0);
2369         DELAY(1000);
2370         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 1);
2371         DELAY(1000);
2372         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 0);
2373         DELAY(1000);
2374         MEM_WRITE_1(sc, 0x200000, 0x00);
2375         MEM_WRITE_1(sc, 0x200000, 0x40);
2376         DELAY(1000);
2377
2378         /* write microcode into adapter memory */
2379         for (w = (const uint16_t *)uc; size > 0; w++, size -= 2)
2380                 MEM_WRITE_2(sc, 0x200010, htole16(*w));
2381
2382         MEM_WRITE_1(sc, 0x200000, 0x00);
2383         MEM_WRITE_1(sc, 0x200000, 0x80);
2384
2385         /* wait until we get an answer */
2386         for (ntries = 0; ntries < 100; ntries++) {
2387                 if (MEM_READ_1(sc, 0x200000) & 1)
2388                         break;
2389                 DELAY(100);
2390         }
2391         if (ntries == 100) {
2392                 device_printf(sc->sc_dev,
2393                     "timeout waiting for ucode to initialize\n");
2394                 error = EIO;
2395                 goto fail;
2396         }
2397
2398         /* read the answer or the firmware will not initialize properly */
2399         for (i = 0; i < 7; i++)
2400                 MEM_READ_4(sc, 0x200004);
2401
2402         MEM_WRITE_1(sc, 0x200000, 0x00);
2403
2404 fail:
2405         return error;
2406 }
2407
2408 /* macro to handle unaligned little endian data in firmware image */
2409 #define GETLE32(p) ((p)[0] | (p)[1] << 8 | (p)[2] << 16 | (p)[3] << 24)
2410
2411 static int
2412 iwi_load_firmware(struct iwi_softc *sc, const struct iwi_fw *fw)
2413 {
2414         u_char *p, *end;
2415         uint32_t sentinel, ctl, src, dst, sum, len, mlen, tmp;
2416         int ntries, error;
2417
2418         IWI_LOCK_ASSERT(sc);
2419
2420         /* copy firmware image to DMA memory */
2421         memcpy(sc->fw_virtaddr, fw->data, fw->size);
2422
2423         /* make sure the adapter will get up-to-date values */
2424         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_PREWRITE);
2425
2426         /* tell the adapter where the command blocks are stored */
2427         MEM_WRITE_4(sc, 0x3000a0, 0x27000);
2428
2429         /*
2430          * Store command blocks into adapter's internal memory using register
2431          * indirections. The adapter will read the firmware image through DMA
2432          * using information stored in command blocks.
2433          */
2434         src = sc->fw_physaddr;
2435         p = sc->fw_virtaddr;
2436         end = p + fw->size;
2437         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0x27000);
2438
2439         while (p < end) {
2440                 dst = GETLE32(p); p += 4; src += 4;
2441                 len = GETLE32(p); p += 4; src += 4;
2442                 p += len;
2443
2444                 while (len > 0) {
2445                         mlen = min(len, IWI_CB_MAXDATALEN);
2446
2447                         ctl = IWI_CB_DEFAULT_CTL | mlen;
2448                         sum = ctl ^ src ^ dst;
2449
2450                         /* write a command block */
2451                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, ctl);
2452                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, src);
2453                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, dst);
2454                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, sum);
2455
2456                         src += mlen;
2457                         dst += mlen;
2458                         len -= mlen;
2459                 }
2460         }
2461
2462         /* write a fictive final command block (sentinel) */
2463         sentinel = CSR_READ_4(sc, IWI_CSR_AUTOINC_ADDR);
2464         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2465
2466         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2467         tmp &= ~(IWI_RST_MASTER_DISABLED | IWI_RST_STOP_MASTER);
2468         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2469
2470         /* tell the adapter to start processing command blocks */
2471         MEM_WRITE_4(sc, 0x3000a4, 0x540100);
2472
2473         /* wait until the adapter reaches the sentinel */
2474         for (ntries = 0; ntries < 400; ntries++) {
2475                 if (MEM_READ_4(sc, 0x3000d0) >= sentinel)
2476                         break;
2477                 DELAY(100);
2478         }
2479         /* sync dma, just in case */
2480         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_POSTWRITE);
2481         if (ntries == 400) {
2482                 device_printf(sc->sc_dev,
2483                     "timeout processing command blocks for %s firmware\n",
2484                     fw->name);
2485                 return EIO;
2486         }
2487
2488         /* we're done with command blocks processing */
2489         MEM_WRITE_4(sc, 0x3000a4, 0x540c00);
2490
2491         /* allow interrupts so we know when the firmware is ready */
2492         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, IWI_INTR_MASK);
2493
2494         /* tell the adapter to initialize the firmware */
2495         CSR_WRITE_4(sc, IWI_CSR_RST, 0);
2496
2497         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2498         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_ALLOW_STANDBY);
2499
2500         /* wait at most one second for firmware initialization to complete */
2501         if ((error = msleep(sc, &sc->sc_mtx, 0, "iwiinit", hz)) != 0) {
2502                 device_printf(sc->sc_dev, "timeout waiting for %s firmware "
2503                     "initialization to complete\n", fw->name);
2504         }
2505
2506         return error;
2507 }
2508
2509 static int
2510 iwi_setpowermode(struct iwi_softc *sc, struct ieee80211vap *vap)
2511 {
2512         uint32_t data;
2513
2514         if (vap->iv_flags & IEEE80211_F_PMGTON) {
2515                 /* XXX set more fine-grained operation */
2516                 data = htole32(IWI_POWER_MODE_MAX);
2517         } else
2518                 data = htole32(IWI_POWER_MODE_CAM);
2519
2520         DPRINTF(("Setting power mode to %u\n", le32toh(data)));
2521         return iwi_cmd(sc, IWI_CMD_SET_POWER_MODE, &data, sizeof data);
2522 }
2523
2524 static int
2525 iwi_setwepkeys(struct iwi_softc *sc, struct ieee80211vap *vap)
2526 {
2527         struct iwi_wep_key wepkey;
2528         struct ieee80211_key *wk;
2529         int error, i;
2530
2531         for (i = 0; i < IEEE80211_WEP_NKID; i++) {
2532                 wk = &vap->iv_nw_keys[i];
2533
2534                 wepkey.cmd = IWI_WEP_KEY_CMD_SETKEY;
2535                 wepkey.idx = i;
2536                 wepkey.len = wk->wk_keylen;
2537                 memset(wepkey.key, 0, sizeof wepkey.key);
2538                 memcpy(wepkey.key, wk->wk_key, wk->wk_keylen);
2539                 DPRINTF(("Setting wep key index %u len %u\n", wepkey.idx,
2540                     wepkey.len));
2541                 error = iwi_cmd(sc, IWI_CMD_SET_WEP_KEY, &wepkey,
2542                     sizeof wepkey);
2543                 if (error != 0)
2544                         return error;
2545         }
2546         return 0;
2547 }
2548
2549 static int
2550 iwi_config(struct iwi_softc *sc)
2551 {
2552         struct ifnet *ifp = sc->sc_ifp;
2553         struct ieee80211com *ic = ifp->if_l2com;
2554         struct iwi_configuration config;
2555         struct iwi_rateset rs;
2556         struct iwi_txpower power;
2557         uint32_t data;
2558         int error, i;
2559
2560         IWI_LOCK_ASSERT(sc);
2561
2562         DPRINTF(("Setting MAC address to %6D\n", IF_LLADDR(ifp), ":"));
2563         error = iwi_cmd(sc, IWI_CMD_SET_MAC_ADDRESS, IF_LLADDR(ifp),
2564             IEEE80211_ADDR_LEN);
2565         if (error != 0)
2566                 return error;
2567
2568         memset(&config, 0, sizeof config);
2569         config.bluetooth_coexistence = sc->bluetooth;
2570         config.silence_threshold = 0x1e;
2571         config.antenna = sc->antenna;
2572         config.multicast_enabled = 1;
2573         config.answer_pbreq = (ic->ic_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2574         config.disable_unicast_decryption = 1;
2575         config.disable_multicast_decryption = 1;
2576         if (ic->ic_opmode == IEEE80211_M_MONITOR) {
2577                 config.allow_invalid_frames = 1;
2578                 config.allow_beacon_and_probe_resp = 1;
2579                 config.allow_mgt = 1;
2580         }
2581         DPRINTF(("Configuring adapter\n"));
2582         error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2583         if (error != 0)
2584                 return error;
2585         if (ic->ic_opmode == IEEE80211_M_IBSS) {
2586                 power.mode = IWI_MODE_11B;
2587                 power.nchan = 11;
2588                 for (i = 0; i < 11; i++) {
2589                         power.chan[i].chan = i + 1;
2590                         power.chan[i].power = IWI_TXPOWER_MAX;
2591                 }
2592                 DPRINTF(("Setting .11b channels tx power\n"));
2593                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2594                 if (error != 0)
2595                         return error;
2596
2597                 power.mode = IWI_MODE_11G;
2598                 DPRINTF(("Setting .11g channels tx power\n"));
2599                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2600                 if (error != 0)
2601                         return error;
2602         }
2603
2604         memset(&rs, 0, sizeof rs);
2605         rs.mode = IWI_MODE_11G;
2606         rs.type = IWI_RATESET_TYPE_SUPPORTED;
2607         rs.nrates = ic->ic_sup_rates[IEEE80211_MODE_11G].rs_nrates;
2608         memcpy(rs.rates, ic->ic_sup_rates[IEEE80211_MODE_11G].rs_rates,
2609             rs.nrates);
2610         DPRINTF(("Setting .11bg supported rates (%u)\n", rs.nrates));
2611         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2612         if (error != 0)
2613                 return error;
2614
2615         memset(&rs, 0, sizeof rs);
2616         rs.mode = IWI_MODE_11A;
2617         rs.type = IWI_RATESET_TYPE_SUPPORTED;
2618         rs.nrates = ic->ic_sup_rates[IEEE80211_MODE_11A].rs_nrates;
2619         memcpy(rs.rates, ic->ic_sup_rates[IEEE80211_MODE_11A].rs_rates,
2620             rs.nrates);
2621         DPRINTF(("Setting .11a supported rates (%u)\n", rs.nrates));
2622         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2623         if (error != 0)
2624                 return error;
2625
2626         data = htole32(arc4random());
2627         DPRINTF(("Setting initialization vector to %u\n", le32toh(data)));
2628         error = iwi_cmd(sc, IWI_CMD_SET_IV, &data, sizeof data);
2629         if (error != 0)
2630                 return error;
2631
2632         /* enable adapter */
2633         DPRINTF(("Enabling adapter\n"));
2634         return iwi_cmd(sc, IWI_CMD_ENABLE, NULL, 0);
2635 }
2636
2637 static __inline void
2638 set_scan_type(struct iwi_scan_ext *scan, int ix, int scan_type)
2639 {
2640         uint8_t *st = &scan->scan_type[ix / 2];
2641         if (ix % 2)
2642                 *st = (*st & 0xf0) | ((scan_type & 0xf) << 0);
2643         else
2644                 *st = (*st & 0x0f) | ((scan_type & 0xf) << 4);
2645 }
2646
2647 static int
2648 scan_type(const struct ieee80211_scan_state *ss,
2649         const struct ieee80211_channel *chan)
2650 {
2651         /* We can only set one essid for a directed scan */
2652         if (ss->ss_nssid != 0)
2653                 return IWI_SCAN_TYPE_BDIRECTED;
2654         if ((ss->ss_flags & IEEE80211_SCAN_ACTIVE) &&
2655             (chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0)
2656                 return IWI_SCAN_TYPE_BROADCAST;
2657         return IWI_SCAN_TYPE_PASSIVE;
2658 }
2659
2660 static __inline int
2661 scan_band(const struct ieee80211_channel *c)
2662 {
2663         return IEEE80211_IS_CHAN_5GHZ(c) ?  IWI_CHAN_5GHZ : IWI_CHAN_2GHZ;
2664 }
2665
2666 static void
2667 iwi_monitor_scan(void *arg, int npending)
2668 {
2669         struct iwi_softc *sc = arg;
2670         IWI_LOCK_DECL;
2671
2672         IWI_LOCK(sc);
2673         (void) iwi_scanchan(sc, 2000, 0);
2674         IWI_UNLOCK(sc);
2675 }
2676
2677 /*
2678  * Start a scan on the current channel or all channels.
2679  */
2680 static int
2681 iwi_scanchan(struct iwi_softc *sc, unsigned long maxdwell, int allchan)
2682 {
2683         struct ieee80211com *ic;
2684         struct ieee80211_channel *chan;
2685         struct ieee80211_scan_state *ss;
2686         struct iwi_scan_ext scan;
2687         int error = 0;
2688
2689         IWI_LOCK_ASSERT(sc);
2690         if (sc->fw_state == IWI_FW_SCANNING) {
2691                 /*
2692                  * This should not happen as we only trigger scan_next after
2693                  * completion
2694                  */
2695                 DPRINTF(("%s: called too early - still scanning\n", __func__));
2696                 return (EBUSY);
2697         }
2698         IWI_STATE_BEGIN(sc, IWI_FW_SCANNING);
2699
2700         ic = sc->sc_ifp->if_l2com;
2701         ss = ic->ic_scan;
2702
2703         memset(&scan, 0, sizeof scan);
2704         scan.full_scan_index = htole32(++sc->sc_scangen);
2705         scan.dwell_time[IWI_SCAN_TYPE_PASSIVE] = htole16(maxdwell);
2706         if (ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) {
2707                 /*
2708                  * Use very short dwell times for when we send probe request
2709                  * frames.  Without this bg scans hang.  Ideally this should
2710                  * be handled with early-termination as done by net80211 but
2711                  * that's not feasible (aborting a scan is problematic).
2712                  */
2713                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(30);
2714                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(30);
2715         } else {
2716                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(maxdwell);
2717                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(maxdwell);
2718         }
2719
2720         /* We can only set one essid for a directed scan */
2721         if (ss->ss_nssid != 0) {
2722                 error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ss->ss_ssid[0].ssid,
2723                     ss->ss_ssid[0].len);
2724                 if (error)
2725                         return (error);
2726         }
2727
2728         if (allchan) {
2729                 int i, next, band, b, bstart;
2730                 /*
2731                  * Convert scan list to run-length encoded channel list
2732                  * the firmware requires (preserving the order setup by
2733                  * net80211).  The first entry in each run specifies the
2734                  * band and the count of items in the run.
2735                  */
2736                 next = 0;               /* next open slot */
2737                 bstart = 0;             /* NB: not needed, silence compiler */
2738                 band = -1;              /* NB: impossible value */
2739                 KASSERT(ss->ss_last > 0, ("no channels"));
2740                 for (i = 0; i < ss->ss_last; i++) {
2741                         chan = ss->ss_chans[i];
2742                         b = scan_band(chan);
2743                         if (b != band) {
2744                                 if (band != -1)
2745                                         scan.channels[bstart] =
2746                                             (next - bstart) | band;
2747                                 /* NB: this allocates a slot for the run-len */
2748                                 band = b, bstart = next++;
2749                         }
2750                         if (next >= IWI_SCAN_CHANNELS) {
2751                                 DPRINTF(("truncating scan list\n"));
2752                                 break;
2753                         }
2754                         scan.channels[next] = ieee80211_chan2ieee(ic, chan);
2755                         set_scan_type(&scan, next, scan_type(ss, chan));
2756                         next++;
2757                 }
2758                 scan.channels[bstart] = (next - bstart) | band;
2759         } else {
2760                 /* Scan the current channel only */
2761                 chan = ic->ic_curchan;
2762                 scan.channels[0] = 1 | scan_band(chan);
2763                 scan.channels[1] = ieee80211_chan2ieee(ic, chan);
2764                 set_scan_type(&scan, 1, scan_type(ss, chan));
2765         }
2766 #ifdef IWI_DEBUG
2767         if (iwi_debug > 0) {
2768                 static const char *scantype[8] =
2769                    { "PSTOP", "PASV", "DIR", "BCAST", "BDIR", "5", "6", "7" };
2770                 int i;
2771                 printf("Scan request: index %u dwell %d/%d/%d\n"
2772                     , le32toh(scan.full_scan_index)
2773                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_PASSIVE])
2774                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BROADCAST])
2775                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED])
2776                 );
2777                 i = 0;
2778                 do {
2779                         int run = scan.channels[i];
2780                         if (run == 0)
2781                                 break;
2782                         printf("Scan %d %s channels:", run & 0x3f,
2783                             run & IWI_CHAN_2GHZ ? "2.4GHz" : "5GHz");
2784                         for (run &= 0x3f, i++; run > 0; run--, i++) {
2785                                 uint8_t type = scan.scan_type[i/2];
2786                                 printf(" %u/%s", scan.channels[i],
2787                                     scantype[(i & 1 ? type : type>>4) & 7]);
2788                         }
2789                         printf("\n");
2790                 } while (i < IWI_SCAN_CHANNELS);
2791         }
2792 #endif
2793
2794         return (iwi_cmd(sc, IWI_CMD_SCAN_EXT, &scan, sizeof scan));
2795 }
2796
2797 static int
2798 iwi_set_sensitivity(struct iwi_softc *sc, int8_t rssi_dbm)
2799 {
2800         struct iwi_sensitivity sens;
2801
2802         DPRINTF(("Setting sensitivity to %d\n", rssi_dbm));
2803
2804         memset(&sens, 0, sizeof sens);
2805         sens.rssi = htole16(rssi_dbm);
2806         return iwi_cmd(sc, IWI_CMD_SET_SENSITIVITY, &sens, sizeof sens);
2807 }
2808
2809 static int
2810 iwi_auth_and_assoc(struct iwi_softc *sc, struct ieee80211vap *vap)
2811 {
2812         struct ieee80211com *ic = vap->iv_ic;
2813         struct ifnet *ifp = vap->iv_ifp;
2814         struct ieee80211_node *ni = vap->iv_bss;
2815         struct iwi_configuration config;
2816         struct iwi_associate *assoc = &sc->assoc;
2817         struct iwi_rateset rs;
2818         uint16_t capinfo;
2819         uint32_t data;
2820         int error, mode;
2821
2822         IWI_LOCK_ASSERT(sc);
2823
2824         if (sc->flags & IWI_FLAG_ASSOCIATED) {
2825                 DPRINTF(("Already associated\n"));
2826                 return (-1);
2827         }
2828
2829         IWI_STATE_BEGIN(sc, IWI_FW_ASSOCIATING);
2830         error = 0;
2831         mode = 0;
2832
2833         if (IEEE80211_IS_CHAN_A(ic->ic_curchan))
2834                 mode = IWI_MODE_11A;
2835         else if (IEEE80211_IS_CHAN_G(ic->ic_curchan))
2836                 mode = IWI_MODE_11G;
2837         if (IEEE80211_IS_CHAN_B(ic->ic_curchan))
2838                 mode = IWI_MODE_11B;
2839
2840         if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) {
2841                 memset(&config, 0, sizeof config);
2842                 config.bluetooth_coexistence = sc->bluetooth;
2843                 config.antenna = sc->antenna;
2844                 config.multicast_enabled = 1;
2845                 if (mode == IWI_MODE_11G)
2846                         config.use_protection = 1;
2847                 config.answer_pbreq =
2848                     (vap->iv_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2849                 config.disable_unicast_decryption = 1;
2850                 config.disable_multicast_decryption = 1;
2851                 DPRINTF(("Configuring adapter\n"));
2852                 error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2853                 if (error != 0)
2854                         goto done;
2855         }
2856
2857 #ifdef IWI_DEBUG
2858         if (iwi_debug > 0) {
2859                 printf("Setting ESSID to ");
2860                 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
2861                 printf("\n");
2862         }
2863 #endif
2864         error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ni->ni_essid, ni->ni_esslen);
2865         if (error != 0)
2866                 goto done;
2867
2868         error = iwi_setpowermode(sc, vap);
2869         if (error != 0)
2870                 goto done;
2871
2872         data = htole32(vap->iv_rtsthreshold);
2873         DPRINTF(("Setting RTS threshold to %u\n", le32toh(data)));
2874         error = iwi_cmd(sc, IWI_CMD_SET_RTS_THRESHOLD, &data, sizeof data);
2875         if (error != 0)
2876                 goto done;
2877
2878         data = htole32(vap->iv_fragthreshold);
2879         DPRINTF(("Setting fragmentation threshold to %u\n", le32toh(data)));
2880         error = iwi_cmd(sc, IWI_CMD_SET_FRAG_THRESHOLD, &data, sizeof data);
2881         if (error != 0)
2882                 goto done;
2883
2884         /* the rate set has already been "negotiated" */
2885         memset(&rs, 0, sizeof rs);
2886         rs.mode = mode;
2887         rs.type = IWI_RATESET_TYPE_NEGOTIATED;
2888         rs.nrates = ni->ni_rates.rs_nrates;
2889         if (rs.nrates > IWI_RATESET_SIZE) {
2890                 DPRINTF(("Truncating negotiated rate set from %u\n",
2891                     rs.nrates));
2892                 rs.nrates = IWI_RATESET_SIZE;
2893         }
2894         memcpy(rs.rates, ni->ni_rates.rs_rates, rs.nrates);
2895         DPRINTF(("Setting negotiated rates (%u)\n", rs.nrates));
2896         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2897         if (error != 0)
2898                 goto done;
2899
2900         memset(assoc, 0, sizeof *assoc);
2901
2902         if ((vap->iv_flags & IEEE80211_F_WME) && ni->ni_ies.wme_ie != NULL) {
2903                 /* NB: don't treat WME setup as failure */
2904                 if (iwi_wme_setparams(sc, ic) == 0 && iwi_wme_setie(sc) == 0)
2905                         assoc->policy |= htole16(IWI_POLICY_WME);
2906                 /* XXX complain on failure? */
2907         }
2908
2909         if (vap->iv_appie_wpa != NULL) {
2910                 struct ieee80211_appie *ie = vap->iv_appie_wpa;
2911
2912                 DPRINTF(("Setting optional IE (len=%u)\n", ie->ie_len));
2913                 error = iwi_cmd(sc, IWI_CMD_SET_OPTIE, ie->ie_data, ie->ie_len);
2914                 if (error != 0)
2915                         goto done;
2916         }
2917
2918         error = iwi_set_sensitivity(sc, ic->ic_node_getrssi(ni));
2919         if (error != 0)
2920                 goto done;
2921
2922         assoc->mode = mode;
2923         assoc->chan = ic->ic_curchan->ic_ieee;
2924         /*
2925          * NB: do not arrange for shared key auth w/o privacy
2926          *     (i.e. a wep key); it causes a firmware error.
2927          */
2928         if ((vap->iv_flags & IEEE80211_F_PRIVACY) &&
2929             ni->ni_authmode == IEEE80211_AUTH_SHARED) {
2930                 assoc->auth = IWI_AUTH_SHARED;
2931                 /*
2932                  * It's possible to have privacy marked but no default
2933                  * key setup.  This typically is due to a user app bug
2934                  * but if we blindly grab the key the firmware will
2935                  * barf so avoid it for now.
2936                  */
2937                 if (vap->iv_def_txkey != IEEE80211_KEYIX_NONE)
2938                         assoc->auth |= vap->iv_def_txkey << 4;
2939
2940                 error = iwi_setwepkeys(sc, vap);
2941                 if (error != 0)
2942                         goto done;
2943         }
2944         if (vap->iv_flags & IEEE80211_F_WPA)
2945                 assoc->policy |= htole16(IWI_POLICY_WPA);
2946         if (vap->iv_opmode == IEEE80211_M_IBSS && ni->ni_tstamp.tsf == 0)
2947                 assoc->type = IWI_HC_IBSS_START;
2948         else
2949                 assoc->type = IWI_HC_ASSOC;
2950         memcpy(assoc->tstamp, ni->ni_tstamp.data, 8);
2951
2952         if (vap->iv_opmode == IEEE80211_M_IBSS)
2953                 capinfo = IEEE80211_CAPINFO_IBSS;
2954         else
2955                 capinfo = IEEE80211_CAPINFO_ESS;
2956         if (vap->iv_flags & IEEE80211_F_PRIVACY)
2957                 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2958         if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2959             IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
2960                 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2961         if (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)
2962                 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2963         assoc->capinfo = htole16(capinfo);
2964
2965         assoc->lintval = htole16(ic->ic_lintval);
2966         assoc->intval = htole16(ni->ni_intval);
2967         IEEE80211_ADDR_COPY(assoc->bssid, ni->ni_bssid);
2968         if (vap->iv_opmode == IEEE80211_M_IBSS)
2969                 IEEE80211_ADDR_COPY(assoc->dst, ifp->if_broadcastaddr);
2970         else
2971                 IEEE80211_ADDR_COPY(assoc->dst, ni->ni_bssid);
2972
2973         DPRINTF(("%s bssid %6D dst %6D channel %u policy 0x%x "
2974             "auth %u capinfo 0x%x lintval %u bintval %u\n",
2975             assoc->type == IWI_HC_IBSS_START ? "Start" : "Join",
2976             assoc->bssid, ":", assoc->dst, ":",
2977             assoc->chan, le16toh(assoc->policy), assoc->auth,
2978             le16toh(assoc->capinfo), le16toh(assoc->lintval),
2979             le16toh(assoc->intval)));
2980         error = iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
2981 done:
2982         if (error)
2983                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
2984
2985         return (error);
2986 }
2987
2988 static void
2989 iwi_disassoc(void *arg, int pending)
2990 {
2991         struct iwi_softc *sc = arg;
2992         IWI_LOCK_DECL;
2993
2994         IWI_LOCK(sc);
2995         iwi_disassociate(sc, 0);
2996         IWI_UNLOCK(sc);
2997 }
2998
2999 static int
3000 iwi_disassociate(struct iwi_softc *sc, int quiet)
3001 {
3002         struct iwi_associate *assoc = &sc->assoc;
3003
3004         if ((sc->flags & IWI_FLAG_ASSOCIATED) == 0) {
3005                 DPRINTF(("Not associated\n"));
3006                 return (-1);
3007         }
3008
3009         IWI_STATE_BEGIN(sc, IWI_FW_DISASSOCIATING);
3010
3011         if (quiet)
3012                 assoc->type = IWI_HC_DISASSOC_QUIET;
3013         else
3014                 assoc->type = IWI_HC_DISASSOC;
3015
3016         DPRINTF(("Trying to disassociate from %6D channel %u\n",
3017             assoc->bssid, ":", assoc->chan));
3018         return iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
3019 }
3020
3021 /*
3022  * release dma resources for the firmware
3023  */
3024 static void
3025 iwi_release_fw_dma(struct iwi_softc *sc)
3026 {
3027         if (sc->fw_flags & IWI_FW_HAVE_PHY)
3028                 bus_dmamap_unload(sc->fw_dmat, sc->fw_map);
3029         if (sc->fw_flags & IWI_FW_HAVE_MAP)
3030                 bus_dmamem_free(sc->fw_dmat, sc->fw_virtaddr, sc->fw_map);
3031         if (sc->fw_flags & IWI_FW_HAVE_DMAT)
3032                 bus_dma_tag_destroy(sc->fw_dmat);
3033
3034         sc->fw_flags = 0;
3035         sc->fw_dma_size = 0;
3036         sc->fw_dmat = NULL;
3037         sc->fw_map = NULL;
3038         sc->fw_physaddr = 0;
3039         sc->fw_virtaddr = NULL;
3040 }
3041
3042 /*
3043  * allocate the dma descriptor for the firmware.
3044  * Return 0 on success, 1 on error.
3045  * Must be called unlocked, protected by IWI_FLAG_FW_LOADING.
3046  */
3047 static int
3048 iwi_init_fw_dma(struct iwi_softc *sc, int size)
3049 {
3050         if (sc->fw_dma_size >= size)
3051                 return 0;
3052         if (bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
3053             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
3054             size, 1, size, 0, NULL, NULL, &sc->fw_dmat) != 0) {
3055                 device_printf(sc->sc_dev,
3056                     "could not create firmware DMA tag\n");
3057                 goto error;
3058         }
3059         sc->fw_flags |= IWI_FW_HAVE_DMAT;
3060         if (bus_dmamem_alloc(sc->fw_dmat, &sc->fw_virtaddr, 0,
3061             &sc->fw_map) != 0) {
3062                 device_printf(sc->sc_dev,
3063                     "could not allocate firmware DMA memory\n");
3064                 goto error;
3065         }
3066         sc->fw_flags |= IWI_FW_HAVE_MAP;
3067         if (bus_dmamap_load(sc->fw_dmat, sc->fw_map, sc->fw_virtaddr,
3068             size, iwi_dma_map_addr, &sc->fw_physaddr, 0) != 0) {
3069                 device_printf(sc->sc_dev, "could not load firmware DMA map\n");
3070                 goto error;
3071         }
3072         sc->fw_flags |= IWI_FW_HAVE_PHY;
3073         sc->fw_dma_size = size;
3074         return 0;
3075
3076 error:
3077         iwi_release_fw_dma(sc);
3078         return 1;
3079 }
3080
3081 static void
3082 iwi_init_locked(struct iwi_softc *sc)
3083 {
3084         struct ifnet *ifp = sc->sc_ifp;
3085         struct iwi_rx_data *data;
3086         int i;
3087
3088         IWI_LOCK_ASSERT(sc);
3089
3090         if (sc->fw_state == IWI_FW_LOADING) {
3091                 device_printf(sc->sc_dev, "%s: already loading\n", __func__);
3092                 return;         /* XXX: condvar? */
3093         }
3094
3095         iwi_stop_locked(sc);
3096
3097         IWI_STATE_BEGIN(sc, IWI_FW_LOADING);
3098
3099         if (iwi_reset(sc) != 0) {
3100                 device_printf(sc->sc_dev, "could not reset adapter\n");
3101                 goto fail;
3102         }
3103         if (iwi_load_firmware(sc, &sc->fw_boot) != 0) {
3104                 device_printf(sc->sc_dev,
3105                     "could not load boot firmware %s\n", sc->fw_boot.name);
3106                 goto fail;
3107         }
3108         if (iwi_load_ucode(sc, &sc->fw_uc) != 0) {
3109                 device_printf(sc->sc_dev,
3110                     "could not load microcode %s\n", sc->fw_uc.name);
3111                 goto fail;
3112         }
3113
3114         iwi_stop_master(sc);
3115
3116         CSR_WRITE_4(sc, IWI_CSR_CMD_BASE, sc->cmdq.physaddr);
3117         CSR_WRITE_4(sc, IWI_CSR_CMD_SIZE, sc->cmdq.count);
3118         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
3119
3120         CSR_WRITE_4(sc, IWI_CSR_TX1_BASE, sc->txq[0].physaddr);
3121         CSR_WRITE_4(sc, IWI_CSR_TX1_SIZE, sc->txq[0].count);
3122         CSR_WRITE_4(sc, IWI_CSR_TX1_WIDX, sc->txq[0].cur);
3123
3124         CSR_WRITE_4(sc, IWI_CSR_TX2_BASE, sc->txq[1].physaddr);
3125         CSR_WRITE_4(sc, IWI_CSR_TX2_SIZE, sc->txq[1].count);
3126         CSR_WRITE_4(sc, IWI_CSR_TX2_WIDX, sc->txq[1].cur);
3127
3128         CSR_WRITE_4(sc, IWI_CSR_TX3_BASE, sc->txq[2].physaddr);
3129         CSR_WRITE_4(sc, IWI_CSR_TX3_SIZE, sc->txq[2].count);
3130         CSR_WRITE_4(sc, IWI_CSR_TX3_WIDX, sc->txq[2].cur);
3131
3132         CSR_WRITE_4(sc, IWI_CSR_TX4_BASE, sc->txq[3].physaddr);
3133         CSR_WRITE_4(sc, IWI_CSR_TX4_SIZE, sc->txq[3].count);
3134         CSR_WRITE_4(sc, IWI_CSR_TX4_WIDX, sc->txq[3].cur);
3135
3136         for (i = 0; i < sc->rxq.count; i++) {
3137                 data = &sc->rxq.data[i];
3138                 CSR_WRITE_4(sc, data->reg, data->physaddr);
3139         }
3140
3141         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, sc->rxq.count - 1);
3142
3143         if (iwi_load_firmware(sc, &sc->fw_fw) != 0) {
3144                 device_printf(sc->sc_dev,
3145                     "could not load main firmware %s\n", sc->fw_fw.name);
3146                 goto fail;
3147         }
3148         sc->flags |= IWI_FLAG_FW_INITED;
3149
3150         IWI_STATE_END(sc, IWI_FW_LOADING);
3151
3152         if (iwi_config(sc) != 0) {
3153                 device_printf(sc->sc_dev, "unable to enable adapter\n");
3154                 goto fail2;
3155         }
3156
3157         callout_reset(&sc->sc_wdtimer, hz, iwi_watchdog, sc);
3158         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
3159         ifp->if_drv_flags |= IFF_DRV_RUNNING;
3160         return;
3161 fail:
3162         IWI_STATE_END(sc, IWI_FW_LOADING);
3163 fail2:
3164         iwi_stop_locked(sc);
3165 }
3166
3167 static void
3168 iwi_init(void *priv)
3169 {
3170         struct iwi_softc *sc = priv;
3171         struct ifnet *ifp = sc->sc_ifp;
3172         struct ieee80211com *ic = ifp->if_l2com;
3173         IWI_LOCK_DECL;
3174
3175         IWI_LOCK(sc);
3176         iwi_init_locked(sc);
3177         IWI_UNLOCK(sc);
3178
3179         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
3180                 ieee80211_start_all(ic);
3181 }
3182
3183 static void
3184 iwi_stop_locked(void *priv)
3185 {
3186         struct iwi_softc *sc = priv;
3187         struct ifnet *ifp = sc->sc_ifp;
3188
3189         IWI_LOCK_ASSERT(sc);
3190
3191         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
3192
3193         if (sc->sc_softled) {
3194                 callout_stop(&sc->sc_ledtimer);
3195                 sc->sc_blinking = 0;
3196         }
3197         callout_stop(&sc->sc_wdtimer);
3198         callout_stop(&sc->sc_rftimer);
3199
3200         iwi_stop_master(sc);
3201
3202         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_SOFT_RESET);
3203
3204         /* reset rings */
3205         iwi_reset_cmd_ring(sc, &sc->cmdq);
3206         iwi_reset_tx_ring(sc, &sc->txq[0]);
3207         iwi_reset_tx_ring(sc, &sc->txq[1]);
3208         iwi_reset_tx_ring(sc, &sc->txq[2]);
3209         iwi_reset_tx_ring(sc, &sc->txq[3]);
3210         iwi_reset_rx_ring(sc, &sc->rxq);
3211
3212         sc->sc_tx_timer = 0;
3213         sc->sc_state_timer = 0;
3214         sc->sc_busy_timer = 0;
3215         sc->flags &= ~(IWI_FLAG_BUSY | IWI_FLAG_ASSOCIATED);
3216         sc->fw_state = IWI_FW_IDLE;
3217         wakeup(sc);
3218 }
3219
3220 static void
3221 iwi_stop(struct iwi_softc *sc)
3222 {
3223         IWI_LOCK_DECL;
3224
3225         IWI_LOCK(sc);
3226         iwi_stop_locked(sc);
3227         IWI_UNLOCK(sc);
3228 }
3229
3230 static void
3231 iwi_restart(void *arg, int npending)
3232 {
3233         struct iwi_softc *sc = arg;
3234
3235         iwi_init(sc);
3236 }
3237
3238 /*
3239  * Return whether or not the radio is enabled in hardware
3240  * (i.e. the rfkill switch is "off").
3241  */
3242 static int
3243 iwi_getrfkill(struct iwi_softc *sc)
3244 {
3245         return (CSR_READ_4(sc, IWI_CSR_IO) & IWI_IO_RADIO_ENABLED) == 0;
3246 }
3247
3248 static void
3249 iwi_radio_on(void *arg, int pending)
3250 {
3251         struct iwi_softc *sc = arg;
3252         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
3253
3254         device_printf(sc->sc_dev, "radio turned on\n");
3255
3256         iwi_init(sc);
3257         ieee80211_notify_radio(ic, 1);
3258 }
3259
3260 static void
3261 iwi_rfkill_poll(void *arg)
3262 {
3263         struct iwi_softc *sc = arg;
3264
3265         IWI_LOCK_ASSERT(sc);
3266
3267         /*
3268          * Check for a change in rfkill state.  We get an
3269          * interrupt when a radio is disabled but not when
3270          * it is enabled so we must poll for the latter.
3271          */
3272         if (!iwi_getrfkill(sc)) {
3273                 struct ifnet *ifp = sc->sc_ifp;
3274                 struct ieee80211com *ic = ifp->if_l2com;
3275
3276                 ieee80211_runtask(ic, &sc->sc_radiontask);
3277                 return;
3278         }
3279         callout_reset(&sc->sc_rftimer, 2*hz, iwi_rfkill_poll, sc);
3280 }
3281
3282 static void
3283 iwi_radio_off(void *arg, int pending)
3284 {
3285         struct iwi_softc *sc = arg;
3286         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
3287         IWI_LOCK_DECL;
3288
3289         device_printf(sc->sc_dev, "radio turned off\n");
3290
3291         ieee80211_notify_radio(ic, 0);
3292
3293         IWI_LOCK(sc);
3294         iwi_stop_locked(sc);
3295         iwi_rfkill_poll(sc);
3296         IWI_UNLOCK(sc);
3297 }
3298
3299 static int
3300 iwi_sysctl_stats(SYSCTL_HANDLER_ARGS)
3301 {
3302         struct iwi_softc *sc = arg1;
3303         uint32_t size, buf[128];
3304
3305         memset(buf, 0, sizeof buf);
3306
3307         if (!(sc->flags & IWI_FLAG_FW_INITED))
3308                 return SYSCTL_OUT(req, buf, sizeof buf);
3309
3310         size = min(CSR_READ_4(sc, IWI_CSR_TABLE0_SIZE), 128 - 1);
3311         CSR_READ_REGION_4(sc, IWI_CSR_TABLE0_BASE, &buf[1], size);
3312
3313         return SYSCTL_OUT(req, buf, size);
3314 }
3315
3316 static int
3317 iwi_sysctl_radio(SYSCTL_HANDLER_ARGS)
3318 {
3319         struct iwi_softc *sc = arg1;
3320         int val = !iwi_getrfkill(sc);
3321
3322         return SYSCTL_OUT(req, &val, sizeof val);
3323 }
3324
3325 /*
3326  * Add sysctl knobs.
3327  */
3328 static void
3329 iwi_sysctlattach(struct iwi_softc *sc)
3330 {
3331         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
3332         struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
3333
3334         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "radio",
3335             CTLTYPE_INT | CTLFLAG_RD, sc, 0, iwi_sysctl_radio, "I",
3336             "radio transmitter switch state (0=off, 1=on)");
3337
3338         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "stats",
3339             CTLTYPE_OPAQUE | CTLFLAG_RD, sc, 0, iwi_sysctl_stats, "S",
3340             "statistics");
3341
3342         sc->bluetooth = 0;
3343         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "bluetooth",
3344             CTLFLAG_RW, &sc->bluetooth, 0, "bluetooth coexistence");
3345
3346         sc->antenna = IWI_ANTENNA_AUTO;
3347         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "antenna",
3348             CTLFLAG_RW, &sc->antenna, 0, "antenna (0=auto)");
3349 }
3350
3351 /*
3352  * LED support.
3353  *
3354  * Different cards have different capabilities.  Some have three
3355  * led's while others have only one.  The linux ipw driver defines
3356  * led's for link state (associated or not), band (11a, 11g, 11b),
3357  * and for link activity.  We use one led and vary the blink rate
3358  * according to the tx/rx traffic a la the ath driver.
3359  */
3360
3361 static __inline uint32_t
3362 iwi_toggle_event(uint32_t r)
3363 {
3364         return r &~ (IWI_RST_STANDBY | IWI_RST_GATE_ODMA |
3365                      IWI_RST_GATE_IDMA | IWI_RST_GATE_ADMA);
3366 }
3367
3368 static uint32_t
3369 iwi_read_event(struct iwi_softc *sc)
3370 {
3371         return MEM_READ_4(sc, IWI_MEM_EEPROM_EVENT);
3372 }
3373
3374 static void
3375 iwi_write_event(struct iwi_softc *sc, uint32_t v)
3376 {
3377         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, v);
3378 }
3379
3380 static void
3381 iwi_led_done(void *arg)
3382 {
3383         struct iwi_softc *sc = arg;
3384
3385         sc->sc_blinking = 0;
3386 }
3387
3388 /*
3389  * Turn the activity LED off: flip the pin and then set a timer so no
3390  * update will happen for the specified duration.
3391  */
3392 static void
3393 iwi_led_off(void *arg)
3394 {
3395         struct iwi_softc *sc = arg;
3396         uint32_t v;
3397
3398         v = iwi_read_event(sc);
3399         v &= ~sc->sc_ledpin;
3400         iwi_write_event(sc, iwi_toggle_event(v));
3401         callout_reset(&sc->sc_ledtimer, sc->sc_ledoff, iwi_led_done, sc);
3402 }
3403
3404 /*
3405  * Blink the LED according to the specified on/off times.
3406  */
3407 static void
3408 iwi_led_blink(struct iwi_softc *sc, int on, int off)
3409 {
3410         uint32_t v;
3411
3412         v = iwi_read_event(sc);
3413         v |= sc->sc_ledpin;
3414         iwi_write_event(sc, iwi_toggle_event(v));
3415         sc->sc_blinking = 1;
3416         sc->sc_ledoff = off;
3417         callout_reset(&sc->sc_ledtimer, on, iwi_led_off, sc);
3418 }
3419
3420 static void
3421 iwi_led_event(struct iwi_softc *sc, int event)
3422 {
3423 #define N(a)    (sizeof(a)/sizeof(a[0]))
3424         /* NB: on/off times from the Atheros NDIS driver, w/ permission */
3425         static const struct {
3426                 u_int           rate;           /* tx/rx iwi rate */
3427                 u_int16_t       timeOn;         /* LED on time (ms) */
3428                 u_int16_t       timeOff;        /* LED off time (ms) */
3429         } blinkrates[] = {
3430                 { IWI_RATE_OFDM54, 40,  10 },
3431                 { IWI_RATE_OFDM48, 44,  11 },
3432                 { IWI_RATE_OFDM36, 50,  13 },
3433                 { IWI_RATE_OFDM24, 57,  14 },
3434                 { IWI_RATE_OFDM18, 67,  16 },
3435                 { IWI_RATE_OFDM12, 80,  20 },
3436                 { IWI_RATE_DS11,  100,  25 },
3437                 { IWI_RATE_OFDM9, 133,  34 },
3438                 { IWI_RATE_OFDM6, 160,  40 },
3439                 { IWI_RATE_DS5,   200,  50 },
3440                 {            6,   240,  58 },   /* XXX 3Mb/s if it existed */
3441                 { IWI_RATE_DS2,   267,  66 },
3442                 { IWI_RATE_DS1,   400, 100 },
3443                 {            0,   500, 130 },   /* unknown rate/polling */
3444         };
3445         uint32_t txrate;
3446         int j = 0;                      /* XXX silence compiler */
3447
3448         sc->sc_ledevent = ticks;        /* time of last event */
3449         if (sc->sc_blinking)            /* don't interrupt active blink */
3450                 return;
3451         switch (event) {
3452         case IWI_LED_POLL:
3453                 j = N(blinkrates)-1;
3454                 break;
3455         case IWI_LED_TX:
3456                 /* read current transmission rate from adapter */
3457                 txrate = CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE);
3458                 if (blinkrates[sc->sc_txrix].rate != txrate) {
3459                         for (j = 0; j < N(blinkrates)-1; j++)
3460                                 if (blinkrates[j].rate == txrate)
3461                                         break;
3462                         sc->sc_txrix = j;
3463                 } else
3464                         j = sc->sc_txrix;
3465                 break;
3466         case IWI_LED_RX:
3467                 if (blinkrates[sc->sc_rxrix].rate != sc->sc_rxrate) {
3468                         for (j = 0; j < N(blinkrates)-1; j++)
3469                                 if (blinkrates[j].rate == sc->sc_rxrate)
3470                                         break;
3471                         sc->sc_rxrix = j;
3472                 } else
3473                         j = sc->sc_rxrix;
3474                 break;
3475         }
3476         /* XXX beware of overflow */
3477         iwi_led_blink(sc, (blinkrates[j].timeOn * hz) / 1000,
3478                 (blinkrates[j].timeOff * hz) / 1000);
3479 #undef N
3480 }
3481
3482 static int
3483 iwi_sysctl_softled(SYSCTL_HANDLER_ARGS)
3484 {
3485         struct iwi_softc *sc = arg1;
3486         int softled = sc->sc_softled;
3487         int error;
3488
3489         error = sysctl_handle_int(oidp, &softled, 0, req);
3490         if (error || !req->newptr)
3491                 return error;
3492         softled = (softled != 0);
3493         if (softled != sc->sc_softled) {
3494                 if (softled) {
3495                         uint32_t v = iwi_read_event(sc);
3496                         v &= ~sc->sc_ledpin;
3497                         iwi_write_event(sc, iwi_toggle_event(v));
3498                 }
3499                 sc->sc_softled = softled;
3500         }
3501         return 0;
3502 }
3503
3504 static void
3505 iwi_ledattach(struct iwi_softc *sc)
3506 {
3507         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
3508         struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
3509
3510         sc->sc_blinking = 0;
3511         sc->sc_ledstate = 1;
3512         sc->sc_ledidle = (2700*hz)/1000;        /* 2.7sec */
3513         callout_init_mtx(&sc->sc_ledtimer, &sc->sc_mtx, 0);
3514
3515         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3516                 "softled", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
3517                 iwi_sysctl_softled, "I", "enable/disable software LED support");
3518         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3519                 "ledpin", CTLFLAG_RW, &sc->sc_ledpin, 0,
3520                 "pin setting to turn activity LED on");
3521         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3522                 "ledidle", CTLFLAG_RW, &sc->sc_ledidle, 0,
3523                 "idle time for inactivity LED (ticks)");
3524         /* XXX for debugging */
3525         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3526                 "nictype", CTLFLAG_RD, &sc->sc_nictype, 0,
3527                 "NIC type from EEPROM");
3528
3529         sc->sc_ledpin = IWI_RST_LED_ACTIVITY;
3530         sc->sc_softled = 1;
3531
3532         sc->sc_nictype = (iwi_read_prom_word(sc, IWI_EEPROM_NIC) >> 8) & 0xff;
3533         if (sc->sc_nictype == 1) {
3534                 /*
3535                  * NB: led's are reversed.
3536                  */
3537                 sc->sc_ledpin = IWI_RST_LED_ASSOCIATED;
3538         }
3539 }
3540
3541 static void
3542 iwi_scan_start(struct ieee80211com *ic)
3543 {
3544         /* ignore */
3545 }
3546
3547 static void
3548 iwi_set_channel(struct ieee80211com *ic)
3549 {
3550         struct ifnet *ifp = ic->ic_ifp;
3551         struct iwi_softc *sc = ifp->if_softc;
3552         if (sc->fw_state == IWI_FW_IDLE)
3553                 iwi_setcurchan(sc, ic->ic_curchan->ic_ieee);
3554 }
3555
3556 static void
3557 iwi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
3558 {
3559         struct ieee80211vap *vap = ss->ss_vap;
3560         struct ifnet *ifp = vap->iv_ic->ic_ifp;
3561         struct iwi_softc *sc = ifp->if_softc;
3562         IWI_LOCK_DECL;
3563
3564         IWI_LOCK(sc);
3565         if (iwi_scanchan(sc, maxdwell, 0))
3566                 ieee80211_cancel_scan(vap);
3567         IWI_UNLOCK(sc);
3568 }
3569
3570 static void
3571 iwi_scan_mindwell(struct ieee80211_scan_state *ss)
3572 {
3573         /* NB: don't try to abort scan; wait for firmware to finish */
3574 }
3575
3576 static void
3577 iwi_scan_end(struct ieee80211com *ic)
3578 {
3579         struct ifnet *ifp = ic->ic_ifp;
3580         struct iwi_softc *sc = ifp->if_softc;
3581         IWI_LOCK_DECL;
3582
3583         IWI_LOCK(sc);
3584         sc->flags &= ~IWI_FLAG_CHANNEL_SCAN;
3585         /* NB: make sure we're still scanning */
3586         if (sc->fw_state == IWI_FW_SCANNING)
3587                 iwi_cmd(sc, IWI_CMD_ABORT_SCAN, NULL, 0);
3588         IWI_UNLOCK(sc);
3589 }