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 name[IFNAMSIZ], int unit, int opmode, int flags,
 133                     const uint8_t bssid[IEEE80211_ADDR_LEN],
 134                     const uint8_t mac[IEEE80211_ADDR_LEN]);
 135 static void     iwi_vap_delete(struct ieee80211vap *);
 136 static void     iwi_dma_map_addr(void *, bus_dma_segment_t *, int, int);
 137 static int      iwi_alloc_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *,
 138                     int);
 139 static void     iwi_reset_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 140 static void     iwi_free_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 141 static int      iwi_alloc_tx_ring(struct iwi_softc *, struct iwi_tx_ring *,
 142                     int, bus_addr_t, bus_addr_t);
 143 static void     iwi_reset_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 144 static void     iwi_free_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 145 static int      iwi_alloc_rx_ring(struct iwi_softc *, struct iwi_rx_ring *,
 146                     int);
 147 static void     iwi_reset_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 148 static void     iwi_free_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 149 static struct ieee80211_node *iwi_node_alloc(struct ieee80211vap *,
 150                     const uint8_t [IEEE80211_ADDR_LEN]);
 151 static void     iwi_node_free(struct ieee80211_node *);
 152 static void     iwi_media_status(struct ifnet *, struct ifmediareq *);
 153 static int      iwi_newstate(struct ieee80211vap *, enum ieee80211_state, int);
 154 static void     iwi_wme_init(struct iwi_softc *);
 155 static int      iwi_wme_setparams(struct iwi_softc *, struct ieee80211com *);
 156 static void     iwi_update_wme(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,
 499         const char name[IFNAMSIZ], int unit, int 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_DONTWAIT, 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
 867         iwi_stop(sc);
 868
 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 ifnet *ifp = sc->sc_ifp;
 877
 878         pci_write_config(dev, 0x41, 0, 1);
 879
 880         if (ifp->if_flags & IFF_UP)
 881                 iwi_init(sc);
 882
 883         return 0;
 884 }
 885
 886 static struct ieee80211_node *
 887 iwi_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN])
 888 {
 889         struct iwi_node *in;
 890
 891         in = malloc(sizeof (struct iwi_node), M_80211_NODE, M_NOWAIT | M_ZERO);
 892         if (in == NULL)
 893                 return NULL;
 894         /* XXX assign sta table entry for adhoc */
 895         in->in_station = -1;
 896
 897         return &in->in_node;
 898 }
 899
 900 static void
 901 iwi_node_free(struct ieee80211_node *ni)
 902 {
 903         struct ieee80211com *ic = ni->ni_ic;
 904         struct iwi_softc *sc = ic->ic_ifp->if_softc;
 905         struct iwi_node *in = (struct iwi_node *)ni;
 906
 907         if (in->in_station != -1) {
 908                 DPRINTF(("%s mac %6D station %u\n", __func__,
 909                     ni->ni_macaddr, ":", in->in_station));
 910                 free_unr(sc->sc_unr, in->in_station);
 911         }
 912
 913         sc->sc_node_free(ni);
 914 }
 915
 916 /*
 917  * Convert h/w rate code to IEEE rate code.
 918  */
 919 static int
 920 iwi_cvtrate(int iwirate)
 921 {
 922         switch (iwirate) {
 923         case IWI_RATE_DS1:      return 2;
 924         case IWI_RATE_DS2:      return 4;
 925         case IWI_RATE_DS5:      return 11;
 926         case IWI_RATE_DS11:     return 22;
 927         case IWI_RATE_OFDM6:    return 12;
 928         case IWI_RATE_OFDM9:    return 18;
 929         case IWI_RATE_OFDM12:   return 24;
 930         case IWI_RATE_OFDM18:   return 36;
 931         case IWI_RATE_OFDM24:   return 48;
 932         case IWI_RATE_OFDM36:   return 72;
 933         case IWI_RATE_OFDM48:   return 96;
 934         case IWI_RATE_OFDM54:   return 108;
 935         }
 936         return 0;
 937 }
 938
 939 /*
 940  * The firmware automatically adapts the transmit speed.  We report its current
 941  * value here.
 942  */
 943 static void
 944 iwi_media_status(struct ifnet *ifp, struct ifmediareq *imr)
 945 {
 946         struct ieee80211vap *vap = ifp->if_softc;
 947         struct ieee80211com *ic = vap->iv_ic;
 948         struct iwi_softc *sc = ic->ic_ifp->if_softc;
 949
 950         /* read current transmission rate from adapter */
 951         vap->iv_bss->ni_txrate =
 952             iwi_cvtrate(CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE));
 953         ieee80211_media_status(ifp, imr);
 954 }
 955
 956 static int
 957 iwi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 958 {
 959         struct iwi_vap *ivp = IWI_VAP(vap);
 960         struct ieee80211com *ic = vap->iv_ic;
 961         struct ifnet *ifp = ic->ic_ifp;
 962         struct iwi_softc *sc = ifp->if_softc;
 963         IWI_LOCK_DECL;
 964
 965         DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__,
 966                 ieee80211_state_name[vap->iv_state],
 967                 ieee80211_state_name[nstate], sc->flags));
 968
 969         IEEE80211_UNLOCK(ic);
 970         IWI_LOCK(sc);
 971         switch (nstate) {
 972         case IEEE80211_S_INIT:
 973                 /*
 974                  * NB: don't try to do this if iwi_stop_master has
 975                  *     shutdown the firmware and disabled interrupts.
 976                  */
 977                 if (vap->iv_state == IEEE80211_S_RUN &&
 978                     (sc->flags & IWI_FLAG_FW_INITED))
 979                         iwi_disassociate(sc, 0);
 980                 break;
 981         case IEEE80211_S_AUTH:
 982                 iwi_auth_and_assoc(sc, vap);
 983                 break;
 984         case IEEE80211_S_RUN:
 985                 if (vap->iv_opmode == IEEE80211_M_IBSS &&
 986                     vap->iv_state == IEEE80211_S_SCAN) {
 987                         /*
 988                          * XXX when joining an ibss network we are called
 989                          * with a SCAN -> RUN transition on scan complete.
 990                          * Use that to call iwi_auth_and_assoc.  On completing
 991                          * the join we are then called again with an
 992                          * AUTH -> RUN transition and we want to do nothing.
 993                          * This is all totally bogus and needs to be redone.
 994                          */
 995                         iwi_auth_and_assoc(sc, vap);
 996                 } else if (vap->iv_opmode == IEEE80211_M_MONITOR)
 997                         ieee80211_runtask(ic, &sc->sc_monitortask);
 998                 break;
 999         case IEEE80211_S_ASSOC:
1000                 /*
1001                  * If we are transitioning from AUTH then just wait
1002                  * for the ASSOC status to come back from the firmware.
1003                  * Otherwise we need to issue the association request.
1004                  */
1005                 if (vap->iv_state == IEEE80211_S_AUTH)
1006                         break;
1007                 iwi_auth_and_assoc(sc, vap);
1008                 break;
1009         default:
1010                 break;
1011         }
1012         IWI_UNLOCK(sc);
1013         IEEE80211_LOCK(ic);
1014         return ivp->iwi_newstate(vap, nstate, arg);
1015 }
1016
1017 /*
1018  * WME parameters coming from IEEE 802.11e specification.  These values are
1019  * already declared in ieee80211_proto.c, but they are static so they can't
1020  * be reused here.
1021  */
1022 static const struct wmeParams iwi_wme_cck_params[WME_NUM_AC] = {
1023         { 0, 3, 5,  7,   0 },   /* WME_AC_BE */
1024         { 0, 3, 5, 10,   0 },   /* WME_AC_BK */
1025         { 0, 2, 4,  5, 188 },   /* WME_AC_VI */
1026         { 0, 2, 3,  4, 102 }    /* WME_AC_VO */
1027 };
1028
1029 static const struct wmeParams iwi_wme_ofdm_params[WME_NUM_AC] = {
1030         { 0, 3, 4,  6,   0 },   /* WME_AC_BE */
1031         { 0, 3, 4, 10,   0 },   /* WME_AC_BK */
1032         { 0, 2, 3,  4,  94 },   /* WME_AC_VI */
1033         { 0, 2, 2,  3,  47 }    /* WME_AC_VO */
1034 };
1035 #define IWI_EXP2(v)     htole16((1 << (v)) - 1)
1036 #define IWI_USEC(v)     htole16(IEEE80211_TXOP_TO_US(v))
1037
1038 static void
1039 iwi_wme_init(struct iwi_softc *sc)
1040 {
1041         const struct wmeParams *wmep;
1042         int ac;
1043
1044         memset(sc->wme, 0, sizeof sc->wme);
1045         for (ac = 0; ac < WME_NUM_AC; ac++) {
1046                 /* set WME values for CCK modulation */
1047                 wmep = &iwi_wme_cck_params[ac];
1048                 sc->wme[1].aifsn[ac] = wmep->wmep_aifsn;
1049                 sc->wme[1].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1050                 sc->wme[1].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1051                 sc->wme[1].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1052                 sc->wme[1].acm[ac]   = wmep->wmep_acm;
1053
1054                 /* set WME values for OFDM modulation */
1055                 wmep = &iwi_wme_ofdm_params[ac];
1056                 sc->wme[2].aifsn[ac] = wmep->wmep_aifsn;
1057                 sc->wme[2].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1058                 sc->wme[2].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1059                 sc->wme[2].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1060                 sc->wme[2].acm[ac]   = wmep->wmep_acm;
1061         }
1062 }
1063
1064 static int
1065 iwi_wme_setparams(struct iwi_softc *sc, struct ieee80211com *ic)
1066 {
1067         const struct wmeParams *wmep;
1068         int ac;
1069
1070         for (ac = 0; ac < WME_NUM_AC; ac++) {
1071                 /* set WME values for current operating mode */
1072                 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac];
1073                 sc->wme[0].aifsn[ac] = wmep->wmep_aifsn;
1074                 sc->wme[0].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1075                 sc->wme[0].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1076                 sc->wme[0].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1077                 sc->wme[0].acm[ac]   = wmep->wmep_acm;
1078         }
1079
1080         DPRINTF(("Setting WME parameters\n"));
1081         return iwi_cmd(sc, IWI_CMD_SET_WME_PARAMS, sc->wme, sizeof sc->wme);
1082 }
1083 #undef IWI_USEC
1084 #undef IWI_EXP2
1085
1086 static void
1087 iwi_update_wme(void *arg, int npending)
1088 {
1089         struct ieee80211com *ic = arg;
1090         struct iwi_softc *sc = ic->ic_ifp->if_softc;
1091         IWI_LOCK_DECL;
1092
1093         IWI_LOCK(sc);
1094         (void) iwi_wme_setparams(sc, ic);
1095         IWI_UNLOCK(sc);
1096 }
1097
1098 static int
1099 iwi_wme_update(struct ieee80211com *ic)
1100 {
1101         struct iwi_softc *sc = ic->ic_ifp->if_softc;
1102         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1103
1104         /*
1105          * We may be called to update the WME parameters in
1106          * the adapter at various places.  If we're already
1107          * associated then initiate the request immediately;
1108          * otherwise we assume the params will get sent down
1109          * to the adapter as part of the work iwi_auth_and_assoc
1110          * does.
1111          */
1112         if (vap->iv_state == IEEE80211_S_RUN)
1113                 ieee80211_runtask(ic, &sc->sc_wmetask);
1114         return (0);
1115 }
1116
1117 static int
1118 iwi_wme_setie(struct iwi_softc *sc)
1119 {
1120         struct ieee80211_wme_info wme;
1121
1122         memset(&wme, 0, sizeof wme);
1123         wme.wme_id = IEEE80211_ELEMID_VENDOR;
1124         wme.wme_len = sizeof (struct ieee80211_wme_info) - 2;
1125         wme.wme_oui[0] = 0x00;
1126         wme.wme_oui[1] = 0x50;
1127         wme.wme_oui[2] = 0xf2;
1128         wme.wme_type = WME_OUI_TYPE;
1129         wme.wme_subtype = WME_INFO_OUI_SUBTYPE;
1130         wme.wme_version = WME_VERSION;
1131         wme.wme_info = 0;
1132
1133         DPRINTF(("Setting WME IE (len=%u)\n", wme.wme_len));
1134         return iwi_cmd(sc, IWI_CMD_SET_WMEIE, &wme, sizeof wme);
1135 }
1136
1137 /*
1138  * Read 16 bits at address 'addr' from the serial EEPROM.
1139  */
1140 static uint16_t
1141 iwi_read_prom_word(struct iwi_softc *sc, uint8_t addr)
1142 {
1143         uint32_t tmp;
1144         uint16_t val;
1145         int n;
1146
1147         /* clock C once before the first command */
1148         IWI_EEPROM_CTL(sc, 0);
1149         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1150         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1151         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1152
1153         /* write start bit (1) */
1154         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1155         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1156
1157         /* write READ opcode (10) */
1158         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1159         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1160         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1161         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1162
1163         /* write address A7-A0 */
1164         for (n = 7; n >= 0; n--) {
1165                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1166                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D));
1167                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1168                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D) | IWI_EEPROM_C);
1169         }
1170
1171         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1172
1173         /* read data Q15-Q0 */
1174         val = 0;
1175         for (n = 15; n >= 0; n--) {
1176                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1177                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1178                 tmp = MEM_READ_4(sc, IWI_MEM_EEPROM_CTL);
1179                 val |= ((tmp & IWI_EEPROM_Q) >> IWI_EEPROM_SHIFT_Q) << n;
1180         }
1181
1182         IWI_EEPROM_CTL(sc, 0);
1183
1184         /* clear Chip Select and clock C */
1185         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1186         IWI_EEPROM_CTL(sc, 0);
1187         IWI_EEPROM_CTL(sc, IWI_EEPROM_C);
1188
1189         return val;
1190 }
1191
1192 static void
1193 iwi_setcurchan(struct iwi_softc *sc, int chan)
1194 {
1195         struct ifnet *ifp = sc->sc_ifp;
1196         struct ieee80211com *ic = ifp->if_l2com;
1197
1198         sc->curchan = chan;
1199         ieee80211_radiotap_chan_change(ic);
1200 }
1201
1202 static void
1203 iwi_frame_intr(struct iwi_softc *sc, struct iwi_rx_data *data, int i,
1204     struct iwi_frame *frame)
1205 {
1206         struct ifnet *ifp = sc->sc_ifp;
1207         struct ieee80211com *ic = ifp->if_l2com;
1208         struct mbuf *mnew, *m;
1209         struct ieee80211_node *ni;
1210         int type, error, framelen;
1211         int8_t rssi, nf;
1212         IWI_LOCK_DECL;
1213
1214         framelen = le16toh(frame->len);
1215         if (framelen < IEEE80211_MIN_LEN || framelen > MCLBYTES) {
1216                 /*
1217                  * XXX >MCLBYTES is bogus as it means the h/w dma'd
1218                  *     out of bounds; need to figure out how to limit
1219                  *     frame size in the firmware
1220                  */
1221                 /* XXX stat */
1222                 DPRINTFN(1,
1223                     ("drop rx frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1224                     le16toh(frame->len), frame->chan, frame->rssi,
1225                     frame->rssi_dbm));
1226                 return;
1227         }
1228
1229         DPRINTFN(5, ("received frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1230             le16toh(frame->len), frame->chan, frame->rssi, frame->rssi_dbm));
1231
1232         if (frame->chan != sc->curchan)
1233                 iwi_setcurchan(sc, frame->chan);
1234
1235         /*
1236          * Try to allocate a new mbuf for this ring element and load it before
1237          * processing the current mbuf. If the ring element cannot be loaded,
1238          * drop the received packet and reuse the old mbuf. In the unlikely
1239          * case that the old mbuf can't be reloaded either, explicitly panic.
1240          */
1241         mnew = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
1242         if (mnew == NULL) {
1243                 ifp->if_ierrors++;
1244                 return;
1245         }
1246
1247         bus_dmamap_unload(sc->rxq.data_dmat, data->map);
1248
1249         error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1250             mtod(mnew, void *), MCLBYTES, iwi_dma_map_addr, &data->physaddr,
1251             0);
1252         if (error != 0) {
1253                 m_freem(mnew);
1254
1255                 /* try to reload the old mbuf */
1256                 error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1257                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
1258                     &data->physaddr, 0);
1259                 if (error != 0) {
1260                         /* very unlikely that it will fail... */
1261                         panic("%s: could not load old rx mbuf",
1262                             device_get_name(sc->sc_dev));
1263                 }
1264                 ifp->if_ierrors++;
1265                 return;
1266         }
1267
1268         /*
1269          * New mbuf successfully loaded, update Rx ring and continue
1270          * processing.
1271          */
1272         m = data->m;
1273         data->m = mnew;
1274         CSR_WRITE_4(sc, data->reg, data->physaddr);
1275
1276         /* finalize mbuf */
1277         m->m_pkthdr.rcvif = ifp;
1278         m->m_pkthdr.len = m->m_len = sizeof (struct iwi_hdr) +
1279             sizeof (struct iwi_frame) + framelen;
1280
1281         m_adj(m, sizeof (struct iwi_hdr) + sizeof (struct iwi_frame));
1282
1283         rssi = frame->rssi_dbm;
1284         nf = -95;
1285         if (ieee80211_radiotap_active(ic)) {
1286                 struct iwi_rx_radiotap_header *tap = &sc->sc_rxtap;
1287
1288                 tap->wr_flags = 0;
1289                 tap->wr_antsignal = rssi;
1290                 tap->wr_antnoise = nf;
1291                 tap->wr_rate = iwi_cvtrate(frame->rate);
1292                 tap->wr_antenna = frame->antenna;
1293         }
1294         IWI_UNLOCK(sc);
1295
1296         ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *));
1297         if (ni != NULL) {
1298                 type = ieee80211_input(ni, m, rssi, nf);
1299                 ieee80211_free_node(ni);
1300         } else
1301                 type = ieee80211_input_all(ic, m, rssi, nf);
1302
1303         IWI_LOCK(sc);
1304         if (sc->sc_softled) {
1305                 /*
1306                  * Blink for any data frame.  Otherwise do a
1307                  * heartbeat-style blink when idle.  The latter
1308                  * is mainly for station mode where we depend on
1309                  * periodic beacon frames to trigger the poll event.
1310                  */
1311                 if (type == IEEE80211_FC0_TYPE_DATA) {
1312                         sc->sc_rxrate = frame->rate;
1313                         iwi_led_event(sc, IWI_LED_RX);
1314                 } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle)
1315                         iwi_led_event(sc, IWI_LED_POLL);
1316         }
1317 }
1318
1319 /*
1320  * Check for an association response frame to see if QoS
1321  * has been negotiated.  We parse just enough to figure
1322  * out if we're supposed to use QoS.  The proper solution
1323  * is to pass the frame up so ieee80211_input can do the
1324  * work but that's made hard by how things currently are
1325  * done in the driver.
1326  */
1327 static void
1328 iwi_checkforqos(struct ieee80211vap *vap,
1329         const struct ieee80211_frame *wh, int len)
1330 {
1331 #define SUBTYPE(wh)     ((wh)->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
1332         const uint8_t *frm, *efrm, *wme;
1333         struct ieee80211_node *ni;
1334         uint16_t capinfo, status, associd;
1335
1336         /* NB: +8 for capinfo, status, associd, and first ie */
1337         if (!(sizeof(*wh)+8 < len && len < IEEE80211_MAX_LEN) ||
1338             SUBTYPE(wh) != IEEE80211_FC0_SUBTYPE_ASSOC_RESP)
1339                 return;
1340         /*
1341          * asresp frame format
1342          *      [2] capability information
1343          *      [2] status
1344          *      [2] association ID
1345          *      [tlv] supported rates
1346          *      [tlv] extended supported rates
1347          *      [tlv] WME
1348          */
1349         frm = (const uint8_t *)&wh[1];
1350         efrm = ((const uint8_t *) wh) + len;
1351
1352         capinfo = le16toh(*(const uint16_t *)frm);
1353         frm += 2;
1354         status = le16toh(*(const uint16_t *)frm);
1355         frm += 2;
1356         associd = le16toh(*(const uint16_t *)frm);
1357         frm += 2;
1358
1359         wme = NULL;
1360         while (frm < efrm) {
1361                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1], return);
1362                 switch (*frm) {
1363                 case IEEE80211_ELEMID_VENDOR:
1364                         if (iswmeoui(frm))
1365                                 wme = frm;
1366                         break;
1367                 }
1368                 frm += frm[1] + 2;
1369         }
1370
1371         ni = vap->iv_bss;
1372         ni->ni_capinfo = capinfo;
1373         ni->ni_associd = associd & 0x3fff;
1374         if (wme != NULL)
1375                 ni->ni_flags |= IEEE80211_NODE_QOS;
1376         else
1377                 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1378 #undef SUBTYPE
1379 }
1380
1381 /*
1382  * Task queue callbacks for iwi_notification_intr used to avoid LOR's.
1383  */
1384
1385 static void
1386 iwi_notification_intr(struct iwi_softc *sc, struct iwi_notif *notif)
1387 {
1388         struct ifnet *ifp = sc->sc_ifp;
1389         struct ieee80211com *ic = ifp->if_l2com;
1390         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1391         struct iwi_notif_scan_channel *chan;
1392         struct iwi_notif_scan_complete *scan;
1393         struct iwi_notif_authentication *auth;
1394         struct iwi_notif_association *assoc;
1395         struct iwi_notif_beacon_state *beacon;
1396
1397         switch (notif->type) {
1398         case IWI_NOTIF_TYPE_SCAN_CHANNEL:
1399                 chan = (struct iwi_notif_scan_channel *)(notif + 1);
1400
1401                 DPRINTFN(3, ("Scan of channel %u complete (%u)\n",
1402                     ieee80211_ieee2mhz(chan->nchan, 0), chan->nchan));
1403
1404                 /* Reset the timer, the scan is still going */
1405                 sc->sc_state_timer = 3;
1406                 break;
1407
1408         case IWI_NOTIF_TYPE_SCAN_COMPLETE:
1409                 scan = (struct iwi_notif_scan_complete *)(notif + 1);
1410
1411                 DPRINTFN(2, ("Scan completed (%u, %u)\n", scan->nchan,
1412                     scan->status));
1413
1414                 IWI_STATE_END(sc, IWI_FW_SCANNING);
1415
1416                 /*
1417                  * Monitor mode works by doing a passive scan to set
1418                  * the channel and enable rx.  Because we don't want
1419                  * to abort a scan lest the firmware crash we scan
1420                  * for a short period of time and automatically restart
1421                  * the scan when notified the sweep has completed.
1422                  */
1423                 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
1424                         ieee80211_runtask(ic, &sc->sc_monitortask);
1425                         break;
1426                 }
1427
1428                 if (scan->status == IWI_SCAN_COMPLETED) {
1429                         /* NB: don't need to defer, net80211 does it for us */
1430                         ieee80211_scan_next(vap);
1431                 }
1432                 break;
1433
1434         case IWI_NOTIF_TYPE_AUTHENTICATION:
1435                 auth = (struct iwi_notif_authentication *)(notif + 1);
1436                 switch (auth->state) {
1437                 case IWI_AUTH_SUCCESS:
1438                         DPRINTFN(2, ("Authentication succeeeded\n"));
1439                         ieee80211_new_state(vap, IEEE80211_S_ASSOC, -1);
1440                         break;
1441                 case IWI_AUTH_FAIL:
1442                         /*
1443                          * These are delivered as an unsolicited deauth
1444                          * (e.g. due to inactivity) or in response to an
1445                          * associate request.
1446                          */
1447                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1448                         if (vap->iv_state != IEEE80211_S_RUN) {
1449                                 DPRINTFN(2, ("Authentication failed\n"));
1450                                 vap->iv_stats.is_rx_auth_fail++;
1451                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1452                         } else {
1453                                 DPRINTFN(2, ("Deauthenticated\n"));
1454                                 vap->iv_stats.is_rx_deauth++;
1455                         }
1456                         ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1457                         break;
1458                 case IWI_AUTH_SENT_1:
1459                 case IWI_AUTH_RECV_2:
1460                 case IWI_AUTH_SEQ1_PASS:
1461                         break;
1462                 case IWI_AUTH_SEQ1_FAIL:
1463                         DPRINTFN(2, ("Initial authentication handshake failed; "
1464                                 "you probably need shared key\n"));
1465                         vap->iv_stats.is_rx_auth_fail++;
1466                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1467                         /* XXX retry shared key when in auto */
1468                         break;
1469                 default:
1470                         device_printf(sc->sc_dev,
1471                             "unknown authentication state %u\n", auth->state);
1472                         break;
1473                 }
1474                 break;
1475
1476         case IWI_NOTIF_TYPE_ASSOCIATION:
1477                 assoc = (struct iwi_notif_association *)(notif + 1);
1478                 switch (assoc->state) {
1479                 case IWI_AUTH_SUCCESS:
1480                         /* re-association, do nothing */
1481                         break;
1482                 case IWI_ASSOC_SUCCESS:
1483                         DPRINTFN(2, ("Association succeeded\n"));
1484                         sc->flags |= IWI_FLAG_ASSOCIATED;
1485                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1486                         iwi_checkforqos(vap,
1487                             (const struct ieee80211_frame *)(assoc+1),
1488                             le16toh(notif->len) - sizeof(*assoc) - 1);
1489                         ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
1490                         break;
1491                 case IWI_ASSOC_INIT:
1492                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1493                         switch (sc->fw_state) {
1494                         case IWI_FW_ASSOCIATING:
1495                                 DPRINTFN(2, ("Association failed\n"));
1496                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1497                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1498                                 break;
1499
1500                         case IWI_FW_DISASSOCIATING:
1501                                 DPRINTFN(2, ("Dissassociated\n"));
1502                                 IWI_STATE_END(sc, IWI_FW_DISASSOCIATING);
1503                                 vap->iv_stats.is_rx_disassoc++;
1504                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1505                                 break;
1506                         }
1507                         break;
1508                 default:
1509                         device_printf(sc->sc_dev,
1510                             "unknown association state %u\n", assoc->state);
1511                         break;
1512                 }
1513                 break;
1514
1515         case IWI_NOTIF_TYPE_BEACON:
1516                 /* XXX check struct length */
1517                 beacon = (struct iwi_notif_beacon_state *)(notif + 1);
1518
1519                 DPRINTFN(5, ("Beacon state (%u, %u)\n",
1520                     beacon->state, le32toh(beacon->number)));
1521
1522                 if (beacon->state == IWI_BEACON_MISS) {
1523                         /*
1524                          * The firmware notifies us of every beacon miss
1525                          * so we need to track the count against the
1526                          * configured threshold before notifying the
1527                          * 802.11 layer.
1528                          * XXX try to roam, drop assoc only on much higher count
1529                          */
1530                         if (le32toh(beacon->number) >= vap->iv_bmissthreshold) {
1531                                 DPRINTF(("Beacon miss: %u >= %u\n",
1532                                     le32toh(beacon->number),
1533                                     vap->iv_bmissthreshold));
1534                                 vap->iv_stats.is_beacon_miss++;
1535                                 /*
1536                                  * It's pointless to notify the 802.11 layer
1537                                  * as it'll try to send a probe request (which
1538                                  * we'll discard) and then timeout and drop us
1539                                  * into scan state.  Instead tell the firmware
1540                                  * to disassociate and then on completion we'll
1541                                  * kick the state machine to scan.
1542                                  */
1543                                 ieee80211_runtask(ic, &sc->sc_disassoctask);
1544                         }
1545                 }
1546                 break;
1547
1548         case IWI_NOTIF_TYPE_CALIBRATION:
1549         case IWI_NOTIF_TYPE_NOISE:
1550         case IWI_NOTIF_TYPE_LINK_QUALITY:
1551                 DPRINTFN(5, ("Notification (%u)\n", notif->type));
1552                 break;
1553
1554         default:
1555                 DPRINTF(("unknown notification type %u flags 0x%x len %u\n",
1556                     notif->type, notif->flags, le16toh(notif->len)));
1557                 break;
1558         }
1559 }
1560
1561 static void
1562 iwi_rx_intr(struct iwi_softc *sc)
1563 {
1564         struct iwi_rx_data *data;
1565         struct iwi_hdr *hdr;
1566         uint32_t hw;
1567
1568         hw = CSR_READ_4(sc, IWI_CSR_RX_RIDX);
1569
1570         for (; sc->rxq.cur != hw;) {
1571                 data = &sc->rxq.data[sc->rxq.cur];
1572
1573                 bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1574                     BUS_DMASYNC_POSTREAD);
1575
1576                 hdr = mtod(data->m, struct iwi_hdr *);
1577
1578                 switch (hdr->type) {
1579                 case IWI_HDR_TYPE_FRAME:
1580                         iwi_frame_intr(sc, data, sc->rxq.cur,
1581                             (struct iwi_frame *)(hdr + 1));
1582                         break;
1583
1584                 case IWI_HDR_TYPE_NOTIF:
1585                         iwi_notification_intr(sc,
1586                             (struct iwi_notif *)(hdr + 1));
1587                         break;
1588
1589                 default:
1590                         device_printf(sc->sc_dev, "unknown hdr type %u\n",
1591                             hdr->type);
1592                 }
1593
1594                 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur));
1595
1596                 sc->rxq.cur = (sc->rxq.cur + 1) % IWI_RX_RING_COUNT;
1597         }
1598
1599         /* tell the firmware what we have processed */
1600         hw = (hw == 0) ? IWI_RX_RING_COUNT - 1 : hw - 1;
1601         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, hw);
1602 }
1603
1604 static void
1605 iwi_tx_intr(struct iwi_softc *sc, struct iwi_tx_ring *txq)
1606 {
1607         struct ifnet *ifp = sc->sc_ifp;
1608         struct iwi_tx_data *data;
1609         uint32_t hw;
1610
1611         hw = CSR_READ_4(sc, txq->csr_ridx);
1612
1613         for (; txq->next != hw;) {
1614                 data = &txq->data[txq->next];
1615
1616                 bus_dmamap_sync(txq->data_dmat, data->map,
1617                     BUS_DMASYNC_POSTWRITE);
1618                 bus_dmamap_unload(txq->data_dmat, data->map);
1619                 if (data->m->m_flags & M_TXCB)
1620                         ieee80211_process_callback(data->ni, data->m, 0/*XXX*/);
1621                 m_freem(data->m);
1622                 data->m = NULL;
1623                 ieee80211_free_node(data->ni);
1624                 data->ni = NULL;
1625
1626                 DPRINTFN(15, ("tx done idx=%u\n", txq->next));
1627
1628                 ifp->if_opackets++;
1629
1630                 txq->queued--;
1631                 txq->next = (txq->next + 1) % IWI_TX_RING_COUNT;
1632         }
1633
1634         sc->sc_tx_timer = 0;
1635         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1636
1637         if (sc->sc_softled)
1638                 iwi_led_event(sc, IWI_LED_TX);
1639
1640         iwi_start_locked(ifp);
1641 }
1642
1643 static void
1644 iwi_fatal_error_intr(struct iwi_softc *sc)
1645 {
1646         struct ifnet *ifp = sc->sc_ifp;
1647         struct ieee80211com *ic = ifp->if_l2com;
1648         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1649
1650         device_printf(sc->sc_dev, "firmware error\n");
1651         if (vap != NULL)
1652                 ieee80211_cancel_scan(vap);
1653         ieee80211_runtask(ic, &sc->sc_restarttask);
1654
1655         sc->flags &= ~IWI_FLAG_BUSY;
1656         sc->sc_busy_timer = 0;
1657         wakeup(sc);
1658 }
1659
1660 static void
1661 iwi_radio_off_intr(struct iwi_softc *sc)
1662 {
1663         struct ifnet *ifp = sc->sc_ifp;
1664         struct ieee80211com *ic = ifp->if_l2com;
1665
1666         ieee80211_runtask(ic, &sc->sc_radiofftask);
1667 }
1668
1669 static void
1670 iwi_intr(void *arg)
1671 {
1672         struct iwi_softc *sc = arg;
1673         uint32_t r;
1674         IWI_LOCK_DECL;
1675
1676         IWI_LOCK(sc);
1677
1678         if ((r = CSR_READ_4(sc, IWI_CSR_INTR)) == 0 || r == 0xffffffff) {
1679                 IWI_UNLOCK(sc);
1680                 return;
1681         }
1682
1683         /* acknowledge interrupts */
1684         CSR_WRITE_4(sc, IWI_CSR_INTR, r);
1685
1686         if (r & IWI_INTR_FATAL_ERROR) {
1687                 iwi_fatal_error_intr(sc);
1688                 goto done;
1689         }
1690
1691         if (r & IWI_INTR_FW_INITED) {
1692                 if (!(r & (IWI_INTR_FATAL_ERROR | IWI_INTR_PARITY_ERROR)))
1693                         wakeup(sc);
1694         }
1695
1696         if (r & IWI_INTR_RADIO_OFF)
1697                 iwi_radio_off_intr(sc);
1698
1699         if (r & IWI_INTR_CMD_DONE) {
1700                 sc->flags &= ~IWI_FLAG_BUSY;
1701                 sc->sc_busy_timer = 0;
1702                 wakeup(sc);
1703         }
1704
1705         if (r & IWI_INTR_TX1_DONE)
1706                 iwi_tx_intr(sc, &sc->txq[0]);
1707
1708         if (r & IWI_INTR_TX2_DONE)
1709                 iwi_tx_intr(sc, &sc->txq[1]);
1710
1711         if (r & IWI_INTR_TX3_DONE)
1712                 iwi_tx_intr(sc, &sc->txq[2]);
1713
1714         if (r & IWI_INTR_TX4_DONE)
1715                 iwi_tx_intr(sc, &sc->txq[3]);
1716
1717         if (r & IWI_INTR_RX_DONE)
1718                 iwi_rx_intr(sc);
1719
1720         if (r & IWI_INTR_PARITY_ERROR) {
1721                 /* XXX rate-limit */
1722                 device_printf(sc->sc_dev, "parity error\n");
1723         }
1724 done:
1725         IWI_UNLOCK(sc);
1726 }
1727
1728 static int
1729 iwi_cmd(struct iwi_softc *sc, uint8_t type, void *data, uint8_t len)
1730 {
1731         struct iwi_cmd_desc *desc;
1732
1733         IWI_LOCK_ASSERT(sc);
1734
1735         if (sc->flags & IWI_FLAG_BUSY) {
1736                 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n",
1737                         __func__, type);
1738                 return EAGAIN;
1739         }
1740         sc->flags |= IWI_FLAG_BUSY;
1741         sc->sc_busy_timer = 2;
1742
1743         desc = &sc->cmdq.desc[sc->cmdq.cur];
1744
1745         desc->hdr.type = IWI_HDR_TYPE_COMMAND;
1746         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1747         desc->type = type;
1748         desc->len = len;
1749         memcpy(desc->data, data, len);
1750
1751         bus_dmamap_sync(sc->cmdq.desc_dmat, sc->cmdq.desc_map,
1752             BUS_DMASYNC_PREWRITE);
1753
1754         DPRINTFN(2, ("sending command idx=%u type=%u len=%u\n", sc->cmdq.cur,
1755             type, len));
1756
1757         sc->cmdq.cur = (sc->cmdq.cur + 1) % IWI_CMD_RING_COUNT;
1758         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
1759
1760         return msleep(sc, &sc->sc_mtx, 0, "iwicmd", hz);
1761 }
1762
1763 static void
1764 iwi_write_ibssnode(struct iwi_softc *sc,
1765         const u_int8_t addr[IEEE80211_ADDR_LEN], int entry)
1766 {
1767         struct iwi_ibssnode node;
1768
1769         /* write node information into NIC memory */
1770         memset(&node, 0, sizeof node);
1771         IEEE80211_ADDR_COPY(node.bssid, addr);
1772
1773         DPRINTF(("%s mac %6D station %u\n", __func__, node.bssid, ":", entry));
1774
1775         CSR_WRITE_REGION_1(sc,
1776             IWI_CSR_NODE_BASE + entry * sizeof node,
1777             (uint8_t *)&node, sizeof node);
1778 }
1779
1780 static int
1781 iwi_tx_start(struct ifnet *ifp, struct mbuf *m0, struct ieee80211_node *ni,
1782     int ac)
1783 {
1784         struct iwi_softc *sc = ifp->if_softc;
1785         struct ieee80211vap *vap = ni->ni_vap;
1786         struct ieee80211com *ic = ni->ni_ic;
1787         struct iwi_node *in = (struct iwi_node *)ni;
1788         const struct ieee80211_frame *wh;
1789         struct ieee80211_key *k;
1790         const struct chanAccParams *cap;
1791         struct iwi_tx_ring *txq = &sc->txq[ac];
1792         struct iwi_tx_data *data;
1793         struct iwi_tx_desc *desc;
1794         struct mbuf *mnew;
1795         bus_dma_segment_t segs[IWI_MAX_NSEG];
1796         int error, nsegs, hdrlen, i;
1797         int ismcast, flags, xflags, staid;
1798
1799         IWI_LOCK_ASSERT(sc);
1800         wh = mtod(m0, const struct ieee80211_frame *);
1801         /* NB: only data frames use this path */
1802         hdrlen = ieee80211_hdrsize(wh);
1803         ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1804         flags = xflags = 0;
1805
1806         if (!ismcast)
1807                 flags |= IWI_DATA_FLAG_NEED_ACK;
1808         if (vap->iv_flags & IEEE80211_F_SHPREAMBLE)
1809                 flags |= IWI_DATA_FLAG_SHPREAMBLE;
1810         if (IEEE80211_QOS_HAS_SEQ(wh)) {
1811                 xflags |= IWI_DATA_XFLAG_QOS;
1812                 cap = &ic->ic_wme.wme_chanParams;
1813                 if (!cap->cap_wmeParams[ac].wmep_noackPolicy)
1814                         flags &= ~IWI_DATA_FLAG_NEED_ACK;
1815         }
1816
1817         /*
1818          * This is only used in IBSS mode where the firmware expect an index
1819          * in a h/w table instead of a destination address.
1820          */
1821         if (vap->iv_opmode == IEEE80211_M_IBSS) {
1822                 if (!ismcast) {
1823                         if (in->in_station == -1) {
1824                                 in->in_station = alloc_unr(sc->sc_unr);
1825                                 if (in->in_station == -1) {
1826                                         /* h/w table is full */
1827                                         m_freem(m0);
1828                                         ieee80211_free_node(ni);
1829                                         ifp->if_oerrors++;
1830                                         return 0;
1831                                 }
1832                                 iwi_write_ibssnode(sc,
1833                                         ni->ni_macaddr, in->in_station);
1834                         }
1835                         staid = in->in_station;
1836                 } else {
1837                         /*
1838                          * Multicast addresses have no associated node
1839                          * so there will be no station entry.  We reserve
1840                          * entry 0 for one mcast address and use that.
1841                          * If there are many being used this will be
1842                          * expensive and we'll need to do a better job
1843                          * but for now this handles the broadcast case.
1844                          */
1845                         if (!IEEE80211_ADDR_EQ(wh->i_addr1, sc->sc_mcast)) {
1846                                 IEEE80211_ADDR_COPY(sc->sc_mcast, wh->i_addr1);
1847                                 iwi_write_ibssnode(sc, sc->sc_mcast, 0);
1848                         }
1849                         staid = 0;
1850                 }
1851         } else
1852                 staid = 0;
1853
1854         if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1855                 k = ieee80211_crypto_encap(ni, m0);
1856                 if (k == NULL) {
1857                         m_freem(m0);
1858                         return ENOBUFS;
1859                 }
1860
1861                 /* packet header may have moved, reset our local pointer */
1862                 wh = mtod(m0, struct ieee80211_frame *);
1863         }
1864
1865         if (ieee80211_radiotap_active_vap(vap)) {
1866                 struct iwi_tx_radiotap_header *tap = &sc->sc_txtap;
1867
1868                 tap->wt_flags = 0;
1869
1870                 ieee80211_radiotap_tx(vap, m0);
1871         }
1872
1873         data = &txq->data[txq->cur];
1874         desc = &txq->desc[txq->cur];
1875
1876         /* save and trim IEEE802.11 header */
1877         m_copydata(m0, 0, hdrlen, (caddr_t)&desc->wh);
1878         m_adj(m0, hdrlen);
1879
1880         error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, segs,
1881             &nsegs, 0);
1882         if (error != 0 && error != EFBIG) {
1883                 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1884                     error);
1885                 m_freem(m0);
1886                 return error;
1887         }
1888         if (error != 0) {
1889                 mnew = m_defrag(m0, M_DONTWAIT);
1890                 if (mnew == NULL) {
1891                         device_printf(sc->sc_dev,
1892                             "could not defragment mbuf\n");
1893                         m_freem(m0);
1894                         return ENOBUFS;
1895                 }
1896                 m0 = mnew;
1897
1898                 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map,
1899                     m0, segs, &nsegs, 0);
1900                 if (error != 0) {
1901                         device_printf(sc->sc_dev,
1902                             "could not map mbuf (error %d)\n", error);
1903                         m_freem(m0);
1904                         return error;
1905                 }
1906         }
1907
1908         data->m = m0;
1909         data->ni = ni;
1910
1911         desc->hdr.type = IWI_HDR_TYPE_DATA;
1912         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1913         desc->station = staid;
1914         desc->cmd = IWI_DATA_CMD_TX;
1915         desc->len = htole16(m0->m_pkthdr.len);
1916         desc->flags = flags;
1917         desc->xflags = xflags;
1918
1919 #if 0
1920         if (vap->iv_flags & IEEE80211_F_PRIVACY)
1921                 desc->wep_txkey = vap->iv_def_txkey;
1922         else
1923 #endif
1924                 desc->flags |= IWI_DATA_FLAG_NO_WEP;
1925
1926         desc->nseg = htole32(nsegs);
1927         for (i = 0; i < nsegs; i++) {
1928                 desc->seg_addr[i] = htole32(segs[i].ds_addr);
1929                 desc->seg_len[i]  = htole16(segs[i].ds_len);
1930         }
1931
1932         bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1933         bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE);
1934
1935         DPRINTFN(5, ("sending data frame txq=%u idx=%u len=%u nseg=%u\n",
1936             ac, txq->cur, le16toh(desc->len), nsegs));
1937
1938         txq->queued++;
1939         txq->cur = (txq->cur + 1) % IWI_TX_RING_COUNT;
1940         CSR_WRITE_4(sc, txq->csr_widx, txq->cur);
1941
1942         return 0;
1943 }
1944
1945 static int
1946 iwi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
1947         const struct ieee80211_bpf_params *params)
1948 {
1949         /* no support; just discard */
1950         m_freem(m);
1951         ieee80211_free_node(ni);
1952         return 0;
1953 }
1954
1955 static void
1956 iwi_start_locked(struct ifnet *ifp)
1957 {
1958         struct iwi_softc *sc = ifp->if_softc;
1959         struct mbuf *m;
1960         struct ieee80211_node *ni;
1961         int ac;
1962
1963         IWI_LOCK_ASSERT(sc);
1964
1965         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1966                 return;
1967
1968         for (;;) {
1969                 IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
1970                 if (m == NULL)
1971                         break;
1972                 ac = M_WME_GETAC(m);
1973                 if (sc->txq[ac].queued > IWI_TX_RING_COUNT - 8) {
1974                         /* there is no place left in this ring; tail drop */
1975                         /* XXX tail drop */
1976                         IFQ_DRV_PREPEND(&ifp->if_snd, m);
1977                         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
1978                         break;
1979                 }
1980
1981                 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
1982                 if (iwi_tx_start(ifp, m, ni, ac) != 0) {
1983                         ieee80211_free_node(ni);
1984                         ifp->if_oerrors++;
1985                         break;
1986                 }
1987
1988                 sc->sc_tx_timer = 5;
1989         }
1990 }
1991
1992 static void
1993 iwi_start(struct ifnet *ifp)
1994 {
1995         struct iwi_softc *sc = ifp->if_softc;
1996         IWI_LOCK_DECL;
1997
1998         IWI_LOCK(sc);
1999         iwi_start_locked(ifp);
2000         IWI_UNLOCK(sc);
2001 }
2002
2003 static void
2004 iwi_watchdog(void *arg)
2005 {
2006         struct iwi_softc *sc = arg;
2007         struct ifnet *ifp = sc->sc_ifp;
2008         struct ieee80211com *ic = ifp->if_l2com;
2009
2010         IWI_LOCK_ASSERT(sc);
2011
2012         if (sc->sc_tx_timer > 0) {
2013                 if (--sc->sc_tx_timer == 0) {
2014                         if_printf(ifp, "device timeout\n");
2015                         ifp->if_oerrors++;
2016                         ieee80211_runtask(ic, &sc->sc_restarttask);
2017                 }
2018         }
2019         if (sc->sc_state_timer > 0) {
2020                 if (--sc->sc_state_timer == 0) {
2021                         if_printf(ifp, "firmware stuck in state %d, resetting\n",
2022                             sc->fw_state);
2023                         if (sc->fw_state == IWI_FW_SCANNING) {
2024                                 struct ieee80211com *ic = ifp->if_l2com;
2025                                 ieee80211_cancel_scan(TAILQ_FIRST(&ic->ic_vaps));
2026                         }
2027                         ieee80211_runtask(ic, &sc->sc_restarttask);
2028                         sc->sc_state_timer = 3;
2029                 }
2030         }
2031         if (sc->sc_busy_timer > 0) {
2032                 if (--sc->sc_busy_timer == 0) {
2033                         if_printf(ifp, "firmware command timeout, resetting\n");
2034                         ieee80211_runtask(ic, &sc->sc_restarttask);
2035                 }
2036         }
2037         callout_reset(&sc->sc_wdtimer, hz, iwi_watchdog, sc);
2038 }
2039
2040 static int
2041 iwi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
2042 {
2043         struct iwi_softc *sc = ifp->if_softc;
2044         struct ieee80211com *ic = ifp->if_l2com;
2045         struct ifreq *ifr = (struct ifreq *) data;
2046         int error = 0, startall = 0;
2047         IWI_LOCK_DECL;
2048
2049         switch (cmd) {
2050         case SIOCSIFFLAGS:
2051                 IWI_LOCK(sc);
2052                 if (ifp->if_flags & IFF_UP) {
2053                         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2054                                 iwi_init_locked(sc);
2055                                 startall = 1;
2056                         }
2057                 } else {
2058                         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
2059                                 iwi_stop_locked(sc);
2060                 }
2061                 IWI_UNLOCK(sc);
2062                 if (startall)
2063                         ieee80211_start_all(ic);
2064                 break;
2065         case SIOCGIFMEDIA:
2066                 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
2067                 break;
2068         case SIOCGIFADDR:
2069                 error = ether_ioctl(ifp, cmd, data);
2070                 break;
2071         default:
2072                 error = EINVAL;
2073                 break;
2074         }
2075         return error;
2076 }
2077
2078 static void
2079 iwi_stop_master(struct iwi_softc *sc)
2080 {
2081         uint32_t tmp;
2082         int ntries;
2083
2084         /* disable interrupts */
2085         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, 0);
2086
2087         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_STOP_MASTER);
2088         for (ntries = 0; ntries < 5; ntries++) {
2089                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2090                         break;
2091                 DELAY(10);
2092         }
2093         if (ntries == 5)
2094                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2095
2096         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2097         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_PRINCETON_RESET);
2098
2099         sc->flags &= ~IWI_FLAG_FW_INITED;
2100 }
2101
2102 static int
2103 iwi_reset(struct iwi_softc *sc)
2104 {
2105         uint32_t tmp;
2106         int i, ntries;
2107
2108         iwi_stop_master(sc);
2109
2110         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2111         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2112
2113         CSR_WRITE_4(sc, IWI_CSR_READ_INT, IWI_READ_INT_INIT_HOST);
2114
2115         /* wait for clock stabilization */
2116         for (ntries = 0; ntries < 1000; ntries++) {
2117                 if (CSR_READ_4(sc, IWI_CSR_CTL) & IWI_CTL_CLOCK_READY)
2118                         break;
2119                 DELAY(200);
2120         }
2121         if (ntries == 1000) {
2122                 device_printf(sc->sc_dev,
2123                     "timeout waiting for clock stabilization\n");
2124                 return EIO;
2125         }
2126
2127         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2128         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_SOFT_RESET);
2129
2130         DELAY(10);
2131
2132         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2133         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2134
2135         /* clear NIC memory */
2136         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0);
2137         for (i = 0; i < 0xc000; i++)
2138                 CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2139
2140         return 0;
2141 }
2142
2143 static const struct iwi_firmware_ohdr *
2144 iwi_setup_ofw(struct iwi_softc *sc, struct iwi_fw *fw)
2145 {
2146         const struct firmware *fp = fw->fp;
2147         const struct iwi_firmware_ohdr *hdr;
2148
2149         if (fp->datasize < sizeof (struct iwi_firmware_ohdr)) {
2150                 device_printf(sc->sc_dev, "image '%s' too small\n", fp->name);
2151                 return NULL;
2152         }
2153         hdr = (const struct iwi_firmware_ohdr *)fp->data;
2154         if ((IWI_FW_GET_MAJOR(le32toh(hdr->version)) != IWI_FW_REQ_MAJOR) ||
2155             (IWI_FW_GET_MINOR(le32toh(hdr->version)) != IWI_FW_REQ_MINOR)) {
2156                 device_printf(sc->sc_dev, "version for '%s' %d.%d != %d.%d\n",
2157                     fp->name, IWI_FW_GET_MAJOR(le32toh(hdr->version)),
2158                     IWI_FW_GET_MINOR(le32toh(hdr->version)), IWI_FW_REQ_MAJOR,
2159                     IWI_FW_REQ_MINOR);
2160                 return NULL;
2161         }
2162         fw->data = ((const char *) fp->data) + sizeof(struct iwi_firmware_ohdr);
2163         fw->size = fp->datasize - sizeof(struct iwi_firmware_ohdr);
2164         fw->name = fp->name;
2165         return hdr;
2166 }
2167
2168 static const struct iwi_firmware_ohdr *
2169 iwi_setup_oucode(struct iwi_softc *sc, struct iwi_fw *fw)
2170 {
2171         const struct iwi_firmware_ohdr *hdr;
2172
2173         hdr = iwi_setup_ofw(sc, fw);
2174         if (hdr != NULL && le32toh(hdr->mode) != IWI_FW_MODE_UCODE) {
2175                 device_printf(sc->sc_dev, "%s is not a ucode image\n",
2176                     fw->name);
2177                 hdr = NULL;
2178         }
2179         return hdr;
2180 }
2181
2182 static void
2183 iwi_getfw(struct iwi_fw *fw, const char *fwname,
2184           struct iwi_fw *uc, const char *ucname)
2185 {
2186         if (fw->fp == NULL)
2187                 fw->fp = firmware_get(fwname);
2188         /* NB: pre-3.0 ucode is packaged separately */
2189         if (uc->fp == NULL && fw->fp != NULL && fw->fp->version < 300)
2190                 uc->fp = firmware_get(ucname);
2191 }
2192
2193 /*
2194  * Get the required firmware images if not already loaded.
2195  * Note that we hold firmware images so long as the device
2196  * is marked up in case we need to reload them on device init.
2197  * This is necessary because we re-init the device sometimes
2198  * from a context where we cannot read from the filesystem
2199  * (e.g. from the taskqueue thread when rfkill is re-enabled).
2200  * XXX return 0 on success, 1 on error.
2201  *
2202  * NB: the order of get'ing and put'ing images here is
2203  * intentional to support handling firmware images bundled
2204  * by operating mode and/or all together in one file with
2205  * the boot firmware as "master".
2206  */
2207 static int
2208 iwi_get_firmware(struct iwi_softc *sc, enum ieee80211_opmode opmode)
2209 {
2210         const struct iwi_firmware_hdr *hdr;
2211         const struct firmware *fp;
2212
2213         /* invalidate cached firmware on mode change */
2214         if (sc->fw_mode != opmode)
2215                 iwi_put_firmware(sc);
2216
2217         switch (opmode) {
2218         case IEEE80211_M_STA:
2219                 iwi_getfw(&sc->fw_fw, "iwi_bss", &sc->fw_uc, "iwi_ucode_bss");
2220                 break;
2221         case IEEE80211_M_IBSS:
2222                 iwi_getfw(&sc->fw_fw, "iwi_ibss", &sc->fw_uc, "iwi_ucode_ibss");
2223                 break;
2224         case IEEE80211_M_MONITOR:
2225                 iwi_getfw(&sc->fw_fw, "iwi_monitor",
2226                           &sc->fw_uc, "iwi_ucode_monitor");
2227                 break;
2228         default:
2229                 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode);
2230                 return EINVAL;
2231         }
2232         fp = sc->fw_fw.fp;
2233         if (fp == NULL) {
2234                 device_printf(sc->sc_dev, "could not load firmware\n");
2235                 goto bad;
2236         }
2237         if (fp->version < 300) {
2238                 /*
2239                  * Firmware prior to 3.0 was packaged as separate
2240                  * boot, firmware, and ucode images.  Verify the
2241                  * ucode image was read in, retrieve the boot image
2242                  * if needed, and check version stamps for consistency.
2243                  * The version stamps in the data are also checked
2244                  * above; this is a bit paranoid but is a cheap
2245                  * safeguard against mis-packaging.
2246                  */
2247                 if (sc->fw_uc.fp == NULL) {
2248                         device_printf(sc->sc_dev, "could not load ucode\n");
2249                         goto bad;
2250                 }
2251                 if (sc->fw_boot.fp == NULL) {
2252                         sc->fw_boot.fp = firmware_get("iwi_boot");
2253                         if (sc->fw_boot.fp == NULL) {
2254                                 device_printf(sc->sc_dev,
2255                                         "could not load boot firmware\n");
2256                                 goto bad;
2257                         }
2258                 }
2259                 if (sc->fw_boot.fp->version != sc->fw_fw.fp->version ||
2260                     sc->fw_boot.fp->version != sc->fw_uc.fp->version) {
2261                         device_printf(sc->sc_dev,
2262                             "firmware version mismatch: "
2263                             "'%s' is %d, '%s' is %d, '%s' is %d\n",
2264                             sc->fw_boot.fp->name, sc->fw_boot.fp->version,
2265                             sc->fw_uc.fp->name, sc->fw_uc.fp->version,
2266                             sc->fw_fw.fp->name, sc->fw_fw.fp->version
2267                         );
2268                         goto bad;
2269                 }
2270                 /*
2271                  * Check and setup each image.
2272                  */
2273                 if (iwi_setup_oucode(sc, &sc->fw_uc) == NULL ||
2274                     iwi_setup_ofw(sc, &sc->fw_boot) == NULL ||
2275                     iwi_setup_ofw(sc, &sc->fw_fw) == NULL)
2276                         goto bad;
2277         } else {
2278                 /*
2279                  * Check and setup combined image.
2280                  */
2281                 if (fp->datasize < sizeof(struct iwi_firmware_hdr)) {
2282                         device_printf(sc->sc_dev, "image '%s' too small\n",
2283                             fp->name);
2284                         goto bad;
2285                 }
2286                 hdr = (const struct iwi_firmware_hdr *)fp->data;
2287                 if (fp->datasize < sizeof(*hdr) + le32toh(hdr->bsize) + le32toh(hdr->usize)
2288                                 + le32toh(hdr->fsize)) {
2289                         device_printf(sc->sc_dev, "image '%s' too small (2)\n",
2290                             fp->name);
2291                         goto bad;
2292                 }
2293                 sc->fw_boot.data = ((const char *) fp->data) + sizeof(*hdr);
2294                 sc->fw_boot.size = le32toh(hdr->bsize);
2295                 sc->fw_boot.name = fp->name;
2296                 sc->fw_uc.data = sc->fw_boot.data + sc->fw_boot.size;
2297                 sc->fw_uc.size = le32toh(hdr->usize);
2298                 sc->fw_uc.name = fp->name;
2299                 sc->fw_fw.data = sc->fw_uc.data + sc->fw_uc.size;
2300                 sc->fw_fw.size = le32toh(hdr->fsize);
2301                 sc->fw_fw.name = fp->name;
2302         }
2303 #if 0
2304         device_printf(sc->sc_dev, "boot %d ucode %d fw %d bytes\n",
2305                 sc->fw_boot.size, sc->fw_uc.size, sc->fw_fw.size);
2306 #endif
2307
2308         sc->fw_mode = opmode;
2309         return 0;
2310 bad:
2311         iwi_put_firmware(sc);
2312         return 1;
2313 }
2314
2315 static void
2316 iwi_put_fw(struct iwi_fw *fw)
2317 {
2318         if (fw->fp != NULL) {
2319                 firmware_put(fw->fp, FIRMWARE_UNLOAD);
2320                 fw->fp = NULL;
2321         }
2322         fw->data = NULL;
2323         fw->size = 0;
2324         fw->name = NULL;
2325 }
2326
2327 /*
2328  * Release any cached firmware images.
2329  */
2330 static void
2331 iwi_put_firmware(struct iwi_softc *sc)
2332 {
2333         iwi_put_fw(&sc->fw_uc);
2334         iwi_put_fw(&sc->fw_fw);
2335         iwi_put_fw(&sc->fw_boot);
2336 }
2337
2338 static int
2339 iwi_load_ucode(struct iwi_softc *sc, const struct iwi_fw *fw)
2340 {
2341         uint32_t tmp;
2342         const uint16_t *w;
2343         const char *uc = fw->data;
2344         size_t size = fw->size;
2345         int i, ntries, error;
2346
2347         IWI_LOCK_ASSERT(sc);
2348         error = 0;
2349         CSR_WRITE_4(sc, IWI_CSR_RST, CSR_READ_4(sc, IWI_CSR_RST) |
2350             IWI_RST_STOP_MASTER);
2351         for (ntries = 0; ntries < 5; ntries++) {
2352                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2353                         break;
2354                 DELAY(10);
2355         }
2356         if (ntries == 5) {
2357                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2358                 error = EIO;
2359                 goto fail;
2360         }
2361
2362         MEM_WRITE_4(sc, 0x3000e0, 0x80000000);
2363         DELAY(5000);
2364
2365         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2366         tmp &= ~IWI_RST_PRINCETON_RESET;
2367         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2368
2369         DELAY(5000);
2370         MEM_WRITE_4(sc, 0x3000e0, 0);
2371         DELAY(1000);
2372         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 1);
2373         DELAY(1000);
2374         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 0);
2375         DELAY(1000);
2376         MEM_WRITE_1(sc, 0x200000, 0x00);
2377         MEM_WRITE_1(sc, 0x200000, 0x40);
2378         DELAY(1000);
2379
2380         /* write microcode into adapter memory */
2381         for (w = (const uint16_t *)uc; size > 0; w++, size -= 2)
2382                 MEM_WRITE_2(sc, 0x200010, htole16(*w));
2383
2384         MEM_WRITE_1(sc, 0x200000, 0x00);
2385         MEM_WRITE_1(sc, 0x200000, 0x80);
2386
2387         /* wait until we get an answer */
2388         for (ntries = 0; ntries < 100; ntries++) {
2389                 if (MEM_READ_1(sc, 0x200000) & 1)
2390                         break;
2391                 DELAY(100);
2392         }
2393         if (ntries == 100) {
2394                 device_printf(sc->sc_dev,
2395                     "timeout waiting for ucode to initialize\n");
2396                 error = EIO;
2397                 goto fail;
2398         }
2399
2400         /* read the answer or the firmware will not initialize properly */
2401         for (i = 0; i < 7; i++)
2402                 MEM_READ_4(sc, 0x200004);
2403
2404         MEM_WRITE_1(sc, 0x200000, 0x00);
2405
2406 fail:
2407         return error;
2408 }
2409
2410 /* macro to handle unaligned little endian data in firmware image */
2411 #define GETLE32(p) ((p)[0] | (p)[1] << 8 | (p)[2] << 16 | (p)[3] << 24)
2412
2413 static int
2414 iwi_load_firmware(struct iwi_softc *sc, const struct iwi_fw *fw)
2415 {
2416         u_char *p, *end;
2417         uint32_t sentinel, ctl, src, dst, sum, len, mlen, tmp;
2418         int ntries, error;
2419
2420         IWI_LOCK_ASSERT(sc);
2421
2422         /* copy firmware image to DMA memory */
2423         memcpy(sc->fw_virtaddr, fw->data, fw->size);
2424
2425         /* make sure the adapter will get up-to-date values */
2426         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_PREWRITE);
2427
2428         /* tell the adapter where the command blocks are stored */
2429         MEM_WRITE_4(sc, 0x3000a0, 0x27000);
2430
2431         /*
2432          * Store command blocks into adapter's internal memory using register
2433          * indirections. The adapter will read the firmware image through DMA
2434          * using information stored in command blocks.
2435          */
2436         src = sc->fw_physaddr;
2437         p = sc->fw_virtaddr;
2438         end = p + fw->size;
2439         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0x27000);
2440
2441         while (p < end) {
2442                 dst = GETLE32(p); p += 4; src += 4;
2443                 len = GETLE32(p); p += 4; src += 4;
2444                 p += len;
2445
2446                 while (len > 0) {
2447                         mlen = min(len, IWI_CB_MAXDATALEN);
2448
2449                         ctl = IWI_CB_DEFAULT_CTL | mlen;
2450                         sum = ctl ^ src ^ dst;
2451
2452                         /* write a command block */
2453                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, ctl);
2454                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, src);
2455                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, dst);
2456                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, sum);
2457
2458                         src += mlen;
2459                         dst += mlen;
2460                         len -= mlen;
2461                 }
2462         }
2463
2464         /* write a fictive final command block (sentinel) */
2465         sentinel = CSR_READ_4(sc, IWI_CSR_AUTOINC_ADDR);
2466         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2467
2468         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2469         tmp &= ~(IWI_RST_MASTER_DISABLED | IWI_RST_STOP_MASTER);
2470         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2471
2472         /* tell the adapter to start processing command blocks */
2473         MEM_WRITE_4(sc, 0x3000a4, 0x540100);
2474
2475         /* wait until the adapter reaches the sentinel */
2476         for (ntries = 0; ntries < 400; ntries++) {
2477                 if (MEM_READ_4(sc, 0x3000d0) >= sentinel)
2478                         break;
2479                 DELAY(100);
2480         }
2481         /* sync dma, just in case */
2482         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_POSTWRITE);
2483         if (ntries == 400) {
2484                 device_printf(sc->sc_dev,
2485                     "timeout processing command blocks for %s firmware\n",
2486                     fw->name);
2487                 return EIO;
2488         }
2489
2490         /* we're done with command blocks processing */
2491         MEM_WRITE_4(sc, 0x3000a4, 0x540c00);
2492
2493         /* allow interrupts so we know when the firmware is ready */
2494         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, IWI_INTR_MASK);
2495
2496         /* tell the adapter to initialize the firmware */
2497         CSR_WRITE_4(sc, IWI_CSR_RST, 0);
2498
2499         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2500         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_ALLOW_STANDBY);
2501
2502         /* wait at most one second for firmware initialization to complete */
2503         if ((error = msleep(sc, &sc->sc_mtx, 0, "iwiinit", hz)) != 0) {
2504                 device_printf(sc->sc_dev, "timeout waiting for %s firmware "
2505                     "initialization to complete\n", fw->name);
2506         }
2507
2508         return error;
2509 }
2510
2511 static int
2512 iwi_setpowermode(struct iwi_softc *sc, struct ieee80211vap *vap)
2513 {
2514         uint32_t data;
2515
2516         if (vap->iv_flags & IEEE80211_F_PMGTON) {
2517                 /* XXX set more fine-grained operation */
2518                 data = htole32(IWI_POWER_MODE_MAX);
2519         } else
2520                 data = htole32(IWI_POWER_MODE_CAM);
2521
2522         DPRINTF(("Setting power mode to %u\n", le32toh(data)));
2523         return iwi_cmd(sc, IWI_CMD_SET_POWER_MODE, &data, sizeof data);
2524 }
2525
2526 static int
2527 iwi_setwepkeys(struct iwi_softc *sc, struct ieee80211vap *vap)
2528 {
2529         struct iwi_wep_key wepkey;
2530         struct ieee80211_key *wk;
2531         int error, i;
2532
2533         for (i = 0; i < IEEE80211_WEP_NKID; i++) {
2534                 wk = &vap->iv_nw_keys[i];
2535
2536                 wepkey.cmd = IWI_WEP_KEY_CMD_SETKEY;
2537                 wepkey.idx = i;
2538                 wepkey.len = wk->wk_keylen;
2539                 memset(wepkey.key, 0, sizeof wepkey.key);
2540                 memcpy(wepkey.key, wk->wk_key, wk->wk_keylen);
2541                 DPRINTF(("Setting wep key index %u len %u\n", wepkey.idx,
2542                     wepkey.len));
2543                 error = iwi_cmd(sc, IWI_CMD_SET_WEP_KEY, &wepkey,
2544                     sizeof wepkey);
2545                 if (error != 0)
2546                         return error;
2547         }
2548         return 0;
2549 }
2550
2551 static int
2552 iwi_config(struct iwi_softc *sc)
2553 {
2554         struct ifnet *ifp = sc->sc_ifp;
2555         struct ieee80211com *ic = ifp->if_l2com;
2556         struct iwi_configuration config;
2557         struct iwi_rateset rs;
2558         struct iwi_txpower power;
2559         uint32_t data;
2560         int error, i;
2561
2562         IWI_LOCK_ASSERT(sc);
2563
2564         DPRINTF(("Setting MAC address to %6D\n", IF_LLADDR(ifp), ":"));
2565         error = iwi_cmd(sc, IWI_CMD_SET_MAC_ADDRESS, IF_LLADDR(ifp),
2566             IEEE80211_ADDR_LEN);
2567         if (error != 0)
2568                 return error;
2569
2570         memset(&config, 0, sizeof config);
2571         config.bluetooth_coexistence = sc->bluetooth;
2572         config.silence_threshold = 0x1e;
2573         config.antenna = sc->antenna;
2574         config.multicast_enabled = 1;
2575         config.answer_pbreq = (ic->ic_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2576         config.disable_unicast_decryption = 1;
2577         config.disable_multicast_decryption = 1;
2578         if (ic->ic_opmode == IEEE80211_M_MONITOR) {
2579                 config.allow_invalid_frames = 1;
2580                 config.allow_beacon_and_probe_resp = 1;
2581                 config.allow_mgt = 1;
2582         }
2583         DPRINTF(("Configuring adapter\n"));
2584         error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2585         if (error != 0)
2586                 return error;
2587         if (ic->ic_opmode == IEEE80211_M_IBSS) {
2588                 power.mode = IWI_MODE_11B;
2589                 power.nchan = 11;
2590                 for (i = 0; i < 11; i++) {
2591                         power.chan[i].chan = i + 1;
2592                         power.chan[i].power = IWI_TXPOWER_MAX;
2593                 }
2594                 DPRINTF(("Setting .11b channels tx power\n"));
2595                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2596                 if (error != 0)
2597                         return error;
2598
2599                 power.mode = IWI_MODE_11G;
2600                 DPRINTF(("Setting .11g channels tx power\n"));
2601                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2602                 if (error != 0)
2603                         return error;
2604         }
2605
2606         memset(&rs, 0, sizeof rs);
2607         rs.mode = IWI_MODE_11G;
2608         rs.type = IWI_RATESET_TYPE_SUPPORTED;
2609         rs.nrates = ic->ic_sup_rates[IEEE80211_MODE_11G].rs_nrates;
2610         memcpy(rs.rates, ic->ic_sup_rates[IEEE80211_MODE_11G].rs_rates,
2611             rs.nrates);
2612         DPRINTF(("Setting .11bg supported rates (%u)\n", rs.nrates));
2613         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2614         if (error != 0)
2615                 return error;
2616
2617         memset(&rs, 0, sizeof rs);
2618         rs.mode = IWI_MODE_11A;
2619         rs.type = IWI_RATESET_TYPE_SUPPORTED;
2620         rs.nrates = ic->ic_sup_rates[IEEE80211_MODE_11A].rs_nrates;
2621         memcpy(rs.rates, ic->ic_sup_rates[IEEE80211_MODE_11A].rs_rates,
2622             rs.nrates);
2623         DPRINTF(("Setting .11a supported rates (%u)\n", rs.nrates));
2624         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2625         if (error != 0)
2626                 return error;
2627
2628         data = htole32(arc4random());
2629         DPRINTF(("Setting initialization vector to %u\n", le32toh(data)));
2630         error = iwi_cmd(sc, IWI_CMD_SET_IV, &data, sizeof data);
2631         if (error != 0)
2632                 return error;
2633
2634         /* enable adapter */
2635         DPRINTF(("Enabling adapter\n"));
2636         return iwi_cmd(sc, IWI_CMD_ENABLE, NULL, 0);
2637 }
2638
2639 static __inline void
2640 set_scan_type(struct iwi_scan_ext *scan, int ix, int scan_type)
2641 {
2642         uint8_t *st = &scan->scan_type[ix / 2];
2643         if (ix % 2)
2644                 *st = (*st & 0xf0) | ((scan_type & 0xf) << 0);
2645         else
2646                 *st = (*st & 0x0f) | ((scan_type & 0xf) << 4);
2647 }
2648
2649 static int
2650 scan_type(const struct ieee80211_scan_state *ss,
2651         const struct ieee80211_channel *chan)
2652 {
2653         /* We can only set one essid for a directed scan */
2654         if (ss->ss_nssid != 0)
2655                 return IWI_SCAN_TYPE_BDIRECTED;
2656         if ((ss->ss_flags & IEEE80211_SCAN_ACTIVE) &&
2657             (chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0)
2658                 return IWI_SCAN_TYPE_BROADCAST;
2659         return IWI_SCAN_TYPE_PASSIVE;
2660 }
2661
2662 static __inline int
2663 scan_band(const struct ieee80211_channel *c)
2664 {
2665         return IEEE80211_IS_CHAN_5GHZ(c) ?  IWI_CHAN_5GHZ : IWI_CHAN_2GHZ;
2666 }
2667
2668 static void
2669 iwi_monitor_scan(void *arg, int npending)
2670 {
2671         struct iwi_softc *sc = arg;
2672         IWI_LOCK_DECL;
2673
2674         IWI_LOCK(sc);
2675         (void) iwi_scanchan(sc, 2000, 0);
2676         IWI_UNLOCK(sc);
2677 }
2678
2679 /*
2680  * Start a scan on the current channel or all channels.
2681  */
2682 static int
2683 iwi_scanchan(struct iwi_softc *sc, unsigned long maxdwell, int allchan)
2684 {
2685         struct ieee80211com *ic;
2686         struct ieee80211_channel *chan;
2687         struct ieee80211_scan_state *ss;
2688         struct iwi_scan_ext scan;
2689         int error = 0;
2690
2691         IWI_LOCK_ASSERT(sc);
2692         if (sc->fw_state == IWI_FW_SCANNING) {
2693                 /*
2694                  * This should not happen as we only trigger scan_next after
2695                  * completion
2696                  */
2697                 DPRINTF(("%s: called too early - still scanning\n", __func__));
2698                 return (EBUSY);
2699         }
2700         IWI_STATE_BEGIN(sc, IWI_FW_SCANNING);
2701
2702         ic = sc->sc_ifp->if_l2com;
2703         ss = ic->ic_scan;
2704
2705         memset(&scan, 0, sizeof scan);
2706         scan.full_scan_index = htole32(++sc->sc_scangen);
2707         scan.dwell_time[IWI_SCAN_TYPE_PASSIVE] = htole16(maxdwell);
2708         if (ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) {
2709                 /*
2710                  * Use very short dwell times for when we send probe request
2711                  * frames.  Without this bg scans hang.  Ideally this should
2712                  * be handled with early-termination as done by net80211 but
2713                  * that's not feasible (aborting a scan is problematic).
2714                  */
2715                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(30);
2716                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(30);
2717         } else {
2718                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(maxdwell);
2719                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(maxdwell);
2720         }
2721
2722         /* We can only set one essid for a directed scan */
2723         if (ss->ss_nssid != 0) {
2724                 error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ss->ss_ssid[0].ssid,
2725                     ss->ss_ssid[0].len);
2726                 if (error)
2727                         return (error);
2728         }
2729
2730         if (allchan) {
2731                 int i, next, band, b, bstart;
2732                 /*
2733                  * Convert scan list to run-length encoded channel list
2734                  * the firmware requires (preserving the order setup by
2735                  * net80211).  The first entry in each run specifies the
2736                  * band and the count of items in the run.
2737                  */
2738                 next = 0;               /* next open slot */
2739                 bstart = 0;             /* NB: not needed, silence compiler */
2740                 band = -1;              /* NB: impossible value */
2741                 KASSERT(ss->ss_last > 0, ("no channels"));
2742                 for (i = 0; i < ss->ss_last; i++) {
2743                         chan = ss->ss_chans[i];
2744                         b = scan_band(chan);
2745                         if (b != band) {
2746                                 if (band != -1)
2747                                         scan.channels[bstart] =
2748                                             (next - bstart) | band;
2749                                 /* NB: this allocates a slot for the run-len */
2750                                 band = b, bstart = next++;
2751                         }
2752                         if (next >= IWI_SCAN_CHANNELS) {
2753                                 DPRINTF(("truncating scan list\n"));
2754                                 break;
2755                         }
2756                         scan.channels[next] = ieee80211_chan2ieee(ic, chan);
2757                         set_scan_type(&scan, next, scan_type(ss, chan));
2758                         next++;
2759                 }
2760                 scan.channels[bstart] = (next - bstart) | band;
2761         } else {
2762                 /* Scan the current channel only */
2763                 chan = ic->ic_curchan;
2764                 scan.channels[0] = 1 | scan_band(chan);
2765                 scan.channels[1] = ieee80211_chan2ieee(ic, chan);
2766                 set_scan_type(&scan, 1, scan_type(ss, chan));
2767         }
2768 #ifdef IWI_DEBUG
2769         if (iwi_debug > 0) {
2770                 static const char *scantype[8] =
2771                    { "PSTOP", "PASV", "DIR", "BCAST", "BDIR", "5", "6", "7" };
2772                 int i;
2773                 printf("Scan request: index %u dwell %d/%d/%d\n"
2774                     , le32toh(scan.full_scan_index)
2775                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_PASSIVE])
2776                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BROADCAST])
2777                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED])
2778                 );
2779                 i = 0;
2780                 do {
2781                         int run = scan.channels[i];
2782                         if (run == 0)
2783                                 break;
2784                         printf("Scan %d %s channels:", run & 0x3f,
2785                             run & IWI_CHAN_2GHZ ? "2.4GHz" : "5GHz");
2786                         for (run &= 0x3f, i++; run > 0; run--, i++) {
2787                                 uint8_t type = scan.scan_type[i/2];
2788                                 printf(" %u/%s", scan.channels[i],
2789                                     scantype[(i & 1 ? type : type>>4) & 7]);
2790                         }
2791                         printf("\n");
2792                 } while (i < IWI_SCAN_CHANNELS);
2793         }
2794 #endif
2795
2796         return (iwi_cmd(sc, IWI_CMD_SCAN_EXT, &scan, sizeof scan));
2797 }
2798
2799 static int
2800 iwi_set_sensitivity(struct iwi_softc *sc, int8_t rssi_dbm)
2801 {
2802         struct iwi_sensitivity sens;
2803
2804         DPRINTF(("Setting sensitivity to %d\n", rssi_dbm));
2805
2806         memset(&sens, 0, sizeof sens);
2807         sens.rssi = htole16(rssi_dbm);
2808         return iwi_cmd(sc, IWI_CMD_SET_SENSITIVITY, &sens, sizeof sens);
2809 }
2810
2811 static int
2812 iwi_auth_and_assoc(struct iwi_softc *sc, struct ieee80211vap *vap)
2813 {
2814         struct ieee80211com *ic = vap->iv_ic;
2815         struct ifnet *ifp = vap->iv_ifp;
2816         struct ieee80211_node *ni = vap->iv_bss;
2817         struct iwi_configuration config;
2818         struct iwi_associate *assoc = &sc->assoc;
2819         struct iwi_rateset rs;
2820         uint16_t capinfo;
2821         uint32_t data;
2822         int error, mode;
2823
2824         IWI_LOCK_ASSERT(sc);
2825
2826         if (sc->flags & IWI_FLAG_ASSOCIATED) {
2827                 DPRINTF(("Already associated\n"));
2828                 return (-1);
2829         }
2830
2831         IWI_STATE_BEGIN(sc, IWI_FW_ASSOCIATING);
2832         error = 0;
2833         mode = 0;
2834
2835         if (IEEE80211_IS_CHAN_A(ic->ic_curchan))
2836                 mode = IWI_MODE_11A;
2837         else if (IEEE80211_IS_CHAN_G(ic->ic_curchan))
2838                 mode = IWI_MODE_11G;
2839         if (IEEE80211_IS_CHAN_B(ic->ic_curchan))
2840                 mode = IWI_MODE_11B;
2841
2842         if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) {
2843                 memset(&config, 0, sizeof config);
2844                 config.bluetooth_coexistence = sc->bluetooth;
2845                 config.antenna = sc->antenna;
2846                 config.multicast_enabled = 1;
2847                 if (mode == IWI_MODE_11G)
2848                         config.use_protection = 1;
2849                 config.answer_pbreq =
2850                     (vap->iv_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2851                 config.disable_unicast_decryption = 1;
2852                 config.disable_multicast_decryption = 1;
2853                 DPRINTF(("Configuring adapter\n"));
2854                 error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2855                 if (error != 0)
2856                         goto done;
2857         }
2858
2859 #ifdef IWI_DEBUG
2860         if (iwi_debug > 0) {
2861                 printf("Setting ESSID to ");
2862                 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
2863                 printf("\n");
2864         }
2865 #endif
2866         error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ni->ni_essid, ni->ni_esslen);
2867         if (error != 0)
2868                 goto done;
2869
2870         error = iwi_setpowermode(sc, vap);
2871         if (error != 0)
2872                 goto done;
2873
2874         data = htole32(vap->iv_rtsthreshold);
2875         DPRINTF(("Setting RTS threshold to %u\n", le32toh(data)));
2876         error = iwi_cmd(sc, IWI_CMD_SET_RTS_THRESHOLD, &data, sizeof data);
2877         if (error != 0)
2878                 goto done;
2879
2880         data = htole32(vap->iv_fragthreshold);
2881         DPRINTF(("Setting fragmentation threshold to %u\n", le32toh(data)));
2882         error = iwi_cmd(sc, IWI_CMD_SET_FRAG_THRESHOLD, &data, sizeof data);
2883         if (error != 0)
2884                 goto done;
2885
2886         /* the rate set has already been "negotiated" */
2887         memset(&rs, 0, sizeof rs);
2888         rs.mode = mode;
2889         rs.type = IWI_RATESET_TYPE_NEGOTIATED;
2890         rs.nrates = ni->ni_rates.rs_nrates;
2891         if (rs.nrates > IWI_RATESET_SIZE) {
2892                 DPRINTF(("Truncating negotiated rate set from %u\n",
2893                     rs.nrates));
2894                 rs.nrates = IWI_RATESET_SIZE;
2895         }
2896         memcpy(rs.rates, ni->ni_rates.rs_rates, rs.nrates);
2897         DPRINTF(("Setting negotiated rates (%u)\n", rs.nrates));
2898         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2899         if (error != 0)
2900                 goto done;
2901
2902         memset(assoc, 0, sizeof *assoc);
2903
2904         if ((vap->iv_flags & IEEE80211_F_WME) && ni->ni_ies.wme_ie != NULL) {
2905                 /* NB: don't treat WME setup as failure */
2906                 if (iwi_wme_setparams(sc, ic) == 0 && iwi_wme_setie(sc) == 0)
2907                         assoc->policy |= htole16(IWI_POLICY_WME);
2908                 /* XXX complain on failure? */
2909         }
2910
2911         if (vap->iv_appie_wpa != NULL) {
2912                 struct ieee80211_appie *ie = vap->iv_appie_wpa;
2913
2914                 DPRINTF(("Setting optional IE (len=%u)\n", ie->ie_len));
2915                 error = iwi_cmd(sc, IWI_CMD_SET_OPTIE, ie->ie_data, ie->ie_len);
2916                 if (error != 0)
2917                         goto done;
2918         }
2919
2920         error = iwi_set_sensitivity(sc, ic->ic_node_getrssi(ni));
2921         if (error != 0)
2922                 goto done;
2923
2924         assoc->mode = mode;
2925         assoc->chan = ic->ic_curchan->ic_ieee;
2926         /*
2927          * NB: do not arrange for shared key auth w/o privacy
2928          *     (i.e. a wep key); it causes a firmware error.
2929          */
2930         if ((vap->iv_flags & IEEE80211_F_PRIVACY) &&
2931             ni->ni_authmode == IEEE80211_AUTH_SHARED) {
2932                 assoc->auth = IWI_AUTH_SHARED;
2933                 /*
2934                  * It's possible to have privacy marked but no default
2935                  * key setup.  This typically is due to a user app bug
2936                  * but if we blindly grab the key the firmware will
2937                  * barf so avoid it for now.
2938                  */
2939                 if (vap->iv_def_txkey != IEEE80211_KEYIX_NONE)
2940                         assoc->auth |= vap->iv_def_txkey << 4;
2941
2942                 error = iwi_setwepkeys(sc, vap);
2943                 if (error != 0)
2944                         goto done;
2945         }
2946         if (vap->iv_flags & IEEE80211_F_WPA)
2947                 assoc->policy |= htole16(IWI_POLICY_WPA);
2948         if (vap->iv_opmode == IEEE80211_M_IBSS && ni->ni_tstamp.tsf == 0)
2949                 assoc->type = IWI_HC_IBSS_START;
2950         else
2951                 assoc->type = IWI_HC_ASSOC;
2952         memcpy(assoc->tstamp, ni->ni_tstamp.data, 8);
2953
2954         if (vap->iv_opmode == IEEE80211_M_IBSS)
2955                 capinfo = IEEE80211_CAPINFO_IBSS;
2956         else
2957                 capinfo = IEEE80211_CAPINFO_ESS;
2958         if (vap->iv_flags & IEEE80211_F_PRIVACY)
2959                 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2960         if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2961             IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
2962                 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2963         if (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)
2964                 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2965         assoc->capinfo = htole16(capinfo);
2966
2967         assoc->lintval = htole16(ic->ic_lintval);
2968         assoc->intval = htole16(ni->ni_intval);
2969         IEEE80211_ADDR_COPY(assoc->bssid, ni->ni_bssid);
2970         if (vap->iv_opmode == IEEE80211_M_IBSS)
2971                 IEEE80211_ADDR_COPY(assoc->dst, ifp->if_broadcastaddr);
2972         else
2973                 IEEE80211_ADDR_COPY(assoc->dst, ni->ni_bssid);
2974
2975         DPRINTF(("%s bssid %6D dst %6D channel %u policy 0x%x "
2976             "auth %u capinfo 0x%x lintval %u bintval %u\n",
2977             assoc->type == IWI_HC_IBSS_START ? "Start" : "Join",
2978             assoc->bssid, ":", assoc->dst, ":",
2979             assoc->chan, le16toh(assoc->policy), assoc->auth,
2980             le16toh(assoc->capinfo), le16toh(assoc->lintval),
2981             le16toh(assoc->intval)));
2982         error = iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
2983 done:
2984         if (error)
2985                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
2986
2987         return (error);
2988 }
2989
2990 static void
2991 iwi_disassoc(void *arg, int pending)
2992 {
2993         struct iwi_softc *sc = arg;
2994         IWI_LOCK_DECL;
2995
2996         IWI_LOCK(sc);
2997         iwi_disassociate(sc, 0);
2998         IWI_UNLOCK(sc);
2999 }
3000
3001 static int
3002 iwi_disassociate(struct iwi_softc *sc, int quiet)
3003 {
3004         struct iwi_associate *assoc = &sc->assoc;
3005
3006         if ((sc->flags & IWI_FLAG_ASSOCIATED) == 0) {
3007                 DPRINTF(("Not associated\n"));
3008                 return (-1);
3009         }
3010
3011         IWI_STATE_BEGIN(sc, IWI_FW_DISASSOCIATING);
3012
3013         if (quiet)
3014                 assoc->type = IWI_HC_DISASSOC_QUIET;
3015         else
3016                 assoc->type = IWI_HC_DISASSOC;
3017
3018         DPRINTF(("Trying to disassociate from %6D channel %u\n",
3019             assoc->bssid, ":", assoc->chan));
3020         return iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
3021 }
3022
3023 /*
3024  * release dma resources for the firmware
3025  */
3026 static void
3027 iwi_release_fw_dma(struct iwi_softc *sc)
3028 {
3029         if (sc->fw_flags & IWI_FW_HAVE_PHY)
3030                 bus_dmamap_unload(sc->fw_dmat, sc->fw_map);
3031         if (sc->fw_flags & IWI_FW_HAVE_MAP)
3032                 bus_dmamem_free(sc->fw_dmat, sc->fw_virtaddr, sc->fw_map);
3033         if (sc->fw_flags & IWI_FW_HAVE_DMAT)
3034                 bus_dma_tag_destroy(sc->fw_dmat);
3035
3036         sc->fw_flags = 0;
3037         sc->fw_dma_size = 0;
3038         sc->fw_dmat = NULL;
3039         sc->fw_map = NULL;
3040         sc->fw_physaddr = 0;
3041         sc->fw_virtaddr = NULL;
3042 }
3043
3044 /*
3045  * allocate the dma descriptor for the firmware.
3046  * Return 0 on success, 1 on error.
3047  * Must be called unlocked, protected by IWI_FLAG_FW_LOADING.
3048  */
3049 static int
3050 iwi_init_fw_dma(struct iwi_softc *sc, int size)
3051 {
3052         if (sc->fw_dma_size >= size)
3053                 return 0;
3054         if (bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
3055             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
3056             size, 1, size, 0, NULL, NULL, &sc->fw_dmat) != 0) {
3057                 device_printf(sc->sc_dev,
3058                     "could not create firmware DMA tag\n");
3059                 goto error;
3060         }
3061         sc->fw_flags |= IWI_FW_HAVE_DMAT;
3062         if (bus_dmamem_alloc(sc->fw_dmat, &sc->fw_virtaddr, 0,
3063             &sc->fw_map) != 0) {
3064                 device_printf(sc->sc_dev,
3065                     "could not allocate firmware DMA memory\n");
3066                 goto error;
3067         }
3068         sc->fw_flags |= IWI_FW_HAVE_MAP;
3069         if (bus_dmamap_load(sc->fw_dmat, sc->fw_map, sc->fw_virtaddr,
3070             size, iwi_dma_map_addr, &sc->fw_physaddr, 0) != 0) {
3071                 device_printf(sc->sc_dev, "could not load firmware DMA map\n");
3072                 goto error;
3073         }
3074         sc->fw_flags |= IWI_FW_HAVE_PHY;
3075         sc->fw_dma_size = size;
3076         return 0;
3077
3078 error:
3079         iwi_release_fw_dma(sc);
3080         return 1;
3081 }
3082
3083 static void
3084 iwi_init_locked(struct iwi_softc *sc)
3085 {
3086         struct ifnet *ifp = sc->sc_ifp;
3087         struct iwi_rx_data *data;
3088         int i;
3089
3090         IWI_LOCK_ASSERT(sc);
3091
3092         if (sc->fw_state == IWI_FW_LOADING) {
3093                 device_printf(sc->sc_dev, "%s: already loading\n", __func__);
3094                 return;         /* XXX: condvar? */
3095         }
3096
3097         iwi_stop_locked(sc);
3098
3099         IWI_STATE_BEGIN(sc, IWI_FW_LOADING);
3100
3101         if (iwi_reset(sc) != 0) {
3102                 device_printf(sc->sc_dev, "could not reset adapter\n");
3103                 goto fail;
3104         }
3105         if (iwi_load_firmware(sc, &sc->fw_boot) != 0) {
3106                 device_printf(sc->sc_dev,
3107                     "could not load boot firmware %s\n", sc->fw_boot.name);
3108                 goto fail;
3109         }
3110         if (iwi_load_ucode(sc, &sc->fw_uc) != 0) {
3111                 device_printf(sc->sc_dev,
3112                     "could not load microcode %s\n", sc->fw_uc.name);
3113                 goto fail;
3114         }
3115
3116         iwi_stop_master(sc);
3117
3118         CSR_WRITE_4(sc, IWI_CSR_CMD_BASE, sc->cmdq.physaddr);
3119         CSR_WRITE_4(sc, IWI_CSR_CMD_SIZE, sc->cmdq.count);
3120         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
3121
3122         CSR_WRITE_4(sc, IWI_CSR_TX1_BASE, sc->txq[0].physaddr);
3123         CSR_WRITE_4(sc, IWI_CSR_TX1_SIZE, sc->txq[0].count);
3124         CSR_WRITE_4(sc, IWI_CSR_TX1_WIDX, sc->txq[0].cur);
3125
3126         CSR_WRITE_4(sc, IWI_CSR_TX2_BASE, sc->txq[1].physaddr);
3127         CSR_WRITE_4(sc, IWI_CSR_TX2_SIZE, sc->txq[1].count);
3128         CSR_WRITE_4(sc, IWI_CSR_TX2_WIDX, sc->txq[1].cur);
3129
3130         CSR_WRITE_4(sc, IWI_CSR_TX3_BASE, sc->txq[2].physaddr);
3131         CSR_WRITE_4(sc, IWI_CSR_TX3_SIZE, sc->txq[2].count);
3132         CSR_WRITE_4(sc, IWI_CSR_TX3_WIDX, sc->txq[2].cur);
3133
3134         CSR_WRITE_4(sc, IWI_CSR_TX4_BASE, sc->txq[3].physaddr);
3135         CSR_WRITE_4(sc, IWI_CSR_TX4_SIZE, sc->txq[3].count);
3136         CSR_WRITE_4(sc, IWI_CSR_TX4_WIDX, sc->txq[3].cur);
3137
3138         for (i = 0; i < sc->rxq.count; i++) {
3139                 data = &sc->rxq.data[i];
3140                 CSR_WRITE_4(sc, data->reg, data->physaddr);
3141         }
3142
3143         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, sc->rxq.count - 1);
3144
3145         if (iwi_load_firmware(sc, &sc->fw_fw) != 0) {
3146                 device_printf(sc->sc_dev,
3147                     "could not load main firmware %s\n", sc->fw_fw.name);
3148                 goto fail;
3149         }
3150         sc->flags |= IWI_FLAG_FW_INITED;
3151
3152         IWI_STATE_END(sc, IWI_FW_LOADING);
3153
3154         if (iwi_config(sc) != 0) {
3155                 device_printf(sc->sc_dev, "unable to enable adapter\n");
3156                 goto fail2;
3157         }
3158
3159         callout_reset(&sc->sc_wdtimer, hz, iwi_watchdog, sc);
3160         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
3161         ifp->if_drv_flags |= IFF_DRV_RUNNING;
3162         return;
3163 fail:
3164         IWI_STATE_END(sc, IWI_FW_LOADING);
3165 fail2:
3166         iwi_stop_locked(sc);
3167 }
3168
3169 static void
3170 iwi_init(void *priv)
3171 {
3172         struct iwi_softc *sc = priv;
3173         struct ifnet *ifp = sc->sc_ifp;
3174         struct ieee80211com *ic = ifp->if_l2com;
3175         IWI_LOCK_DECL;
3176
3177         IWI_LOCK(sc);
3178         iwi_init_locked(sc);
3179         IWI_UNLOCK(sc);
3180
3181         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
3182                 ieee80211_start_all(ic);
3183 }
3184
3185 static void
3186 iwi_stop_locked(void *priv)
3187 {
3188         struct iwi_softc *sc = priv;
3189         struct ifnet *ifp = sc->sc_ifp;
3190
3191         IWI_LOCK_ASSERT(sc);
3192
3193         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
3194
3195         if (sc->sc_softled) {
3196                 callout_stop(&sc->sc_ledtimer);
3197                 sc->sc_blinking = 0;
3198         }
3199         callout_stop(&sc->sc_wdtimer);
3200         callout_stop(&sc->sc_rftimer);
3201
3202         iwi_stop_master(sc);
3203
3204         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_SOFT_RESET);
3205
3206         /* reset rings */
3207         iwi_reset_cmd_ring(sc, &sc->cmdq);
3208         iwi_reset_tx_ring(sc, &sc->txq[0]);
3209         iwi_reset_tx_ring(sc, &sc->txq[1]);
3210         iwi_reset_tx_ring(sc, &sc->txq[2]);
3211         iwi_reset_tx_ring(sc, &sc->txq[3]);
3212         iwi_reset_rx_ring(sc, &sc->rxq);
3213
3214         sc->sc_tx_timer = 0;
3215         sc->sc_state_timer = 0;
3216         sc->sc_busy_timer = 0;
3217         sc->flags &= ~(IWI_FLAG_BUSY | IWI_FLAG_ASSOCIATED);
3218         sc->fw_state = IWI_FW_IDLE;
3219         wakeup(sc);
3220 }
3221
3222 static void
3223 iwi_stop(struct iwi_softc *sc)
3224 {
3225         IWI_LOCK_DECL;
3226
3227         IWI_LOCK(sc);
3228         iwi_stop_locked(sc);
3229         IWI_UNLOCK(sc);
3230 }
3231
3232 static void
3233 iwi_restart(void *arg, int npending)
3234 {
3235         struct iwi_softc *sc = arg;
3236
3237         iwi_init(sc);
3238 }
3239
3240 /*
3241  * Return whether or not the radio is enabled in hardware
3242  * (i.e. the rfkill switch is "off").
3243  */
3244 static int
3245 iwi_getrfkill(struct iwi_softc *sc)
3246 {
3247         return (CSR_READ_4(sc, IWI_CSR_IO) & IWI_IO_RADIO_ENABLED) == 0;
3248 }
3249
3250 static void
3251 iwi_radio_on(void *arg, int pending)
3252 {
3253         struct iwi_softc *sc = arg;
3254         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
3255
3256         device_printf(sc->sc_dev, "radio turned on\n");
3257
3258         iwi_init(sc);
3259         ieee80211_notify_radio(ic, 1);
3260 }
3261
3262 static void
3263 iwi_rfkill_poll(void *arg)
3264 {
3265         struct iwi_softc *sc = arg;
3266
3267         IWI_LOCK_ASSERT(sc);
3268
3269         /*
3270          * Check for a change in rfkill state.  We get an
3271          * interrupt when a radio is disabled but not when
3272          * it is enabled so we must poll for the latter.
3273          */
3274         if (!iwi_getrfkill(sc)) {
3275                 struct ifnet *ifp = sc->sc_ifp;
3276                 struct ieee80211com *ic = ifp->if_l2com;
3277
3278                 ieee80211_runtask(ic, &sc->sc_radiontask);
3279                 return;
3280         }
3281         callout_reset(&sc->sc_rftimer, 2*hz, iwi_rfkill_poll, sc);
3282 }
3283
3284 static void
3285 iwi_radio_off(void *arg, int pending)
3286 {
3287         struct iwi_softc *sc = arg;
3288         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
3289         IWI_LOCK_DECL;
3290
3291         device_printf(sc->sc_dev, "radio turned off\n");
3292
3293         ieee80211_notify_radio(ic, 0);
3294
3295         IWI_LOCK(sc);
3296         iwi_stop_locked(sc);
3297         iwi_rfkill_poll(sc);
3298         IWI_UNLOCK(sc);
3299 }
3300
3301 static int
3302 iwi_sysctl_stats(SYSCTL_HANDLER_ARGS)
3303 {
3304         struct iwi_softc *sc = arg1;
3305         uint32_t size, buf[128];
3306
3307         memset(buf, 0, sizeof buf);
3308
3309         if (!(sc->flags & IWI_FLAG_FW_INITED))
3310                 return SYSCTL_OUT(req, buf, sizeof buf);
3311
3312         size = min(CSR_READ_4(sc, IWI_CSR_TABLE0_SIZE), 128 - 1);
3313         CSR_READ_REGION_4(sc, IWI_CSR_TABLE0_BASE, &buf[1], size);
3314
3315         return SYSCTL_OUT(req, buf, size);
3316 }
3317
3318 static int
3319 iwi_sysctl_radio(SYSCTL_HANDLER_ARGS)
3320 {
3321         struct iwi_softc *sc = arg1;
3322         int val = !iwi_getrfkill(sc);
3323
3324         return SYSCTL_OUT(req, &val, sizeof val);
3325 }
3326
3327 /*
3328  * Add sysctl knobs.
3329  */
3330 static void
3331 iwi_sysctlattach(struct iwi_softc *sc)
3332 {
3333         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
3334         struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
3335
3336         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "radio",
3337             CTLTYPE_INT | CTLFLAG_RD, sc, 0, iwi_sysctl_radio, "I",
3338             "radio transmitter switch state (0=off, 1=on)");
3339
3340         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "stats",
3341             CTLTYPE_OPAQUE | CTLFLAG_RD, sc, 0, iwi_sysctl_stats, "S",
3342             "statistics");
3343
3344         sc->bluetooth = 0;
3345         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "bluetooth",
3346             CTLFLAG_RW, &sc->bluetooth, 0, "bluetooth coexistence");
3347
3348         sc->antenna = IWI_ANTENNA_AUTO;
3349         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "antenna",
3350             CTLFLAG_RW, &sc->antenna, 0, "antenna (0=auto)");
3351 }
3352
3353 /*
3354  * LED support.
3355  *
3356  * Different cards have different capabilities.  Some have three
3357  * led's while others have only one.  The linux ipw driver defines
3358  * led's for link state (associated or not), band (11a, 11g, 11b),
3359  * and for link activity.  We use one led and vary the blink rate
3360  * according to the tx/rx traffic a la the ath driver.
3361  */
3362
3363 static __inline uint32_t
3364 iwi_toggle_event(uint32_t r)
3365 {
3366         return r &~ (IWI_RST_STANDBY | IWI_RST_GATE_ODMA |
3367                      IWI_RST_GATE_IDMA | IWI_RST_GATE_ADMA);
3368 }
3369
3370 static uint32_t
3371 iwi_read_event(struct iwi_softc *sc)
3372 {
3373         return MEM_READ_4(sc, IWI_MEM_EEPROM_EVENT);
3374 }
3375
3376 static void
3377 iwi_write_event(struct iwi_softc *sc, uint32_t v)
3378 {
3379         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, v);
3380 }
3381
3382 static void
3383 iwi_led_done(void *arg)
3384 {
3385         struct iwi_softc *sc = arg;
3386
3387         sc->sc_blinking = 0;
3388 }
3389
3390 /*
3391  * Turn the activity LED off: flip the pin and then set a timer so no
3392  * update will happen for the specified duration.
3393  */
3394 static void
3395 iwi_led_off(void *arg)
3396 {
3397         struct iwi_softc *sc = arg;
3398         uint32_t v;
3399
3400         v = iwi_read_event(sc);
3401         v &= ~sc->sc_ledpin;
3402         iwi_write_event(sc, iwi_toggle_event(v));
3403         callout_reset(&sc->sc_ledtimer, sc->sc_ledoff, iwi_led_done, sc);
3404 }
3405
3406 /*
3407  * Blink the LED according to the specified on/off times.
3408  */
3409 static void
3410 iwi_led_blink(struct iwi_softc *sc, int on, int off)
3411 {
3412         uint32_t v;
3413
3414         v = iwi_read_event(sc);
3415         v |= sc->sc_ledpin;
3416         iwi_write_event(sc, iwi_toggle_event(v));
3417         sc->sc_blinking = 1;
3418         sc->sc_ledoff = off;
3419         callout_reset(&sc->sc_ledtimer, on, iwi_led_off, sc);
3420 }
3421
3422 static void
3423 iwi_led_event(struct iwi_softc *sc, int event)
3424 {
3425 #define N(a)    (sizeof(a)/sizeof(a[0]))
3426         /* NB: on/off times from the Atheros NDIS driver, w/ permission */
3427         static const struct {
3428                 u_int           rate;           /* tx/rx iwi rate */
3429                 u_int16_t       timeOn;         /* LED on time (ms) */
3430                 u_int16_t       timeOff;        /* LED off time (ms) */
3431         } blinkrates[] = {
3432                 { IWI_RATE_OFDM54, 40,  10 },
3433                 { IWI_RATE_OFDM48, 44,  11 },
3434                 { IWI_RATE_OFDM36, 50,  13 },
3435                 { IWI_RATE_OFDM24, 57,  14 },
3436                 { IWI_RATE_OFDM18, 67,  16 },
3437                 { IWI_RATE_OFDM12, 80,  20 },
3438                 { IWI_RATE_DS11,  100,  25 },
3439                 { IWI_RATE_OFDM9, 133,  34 },
3440                 { IWI_RATE_OFDM6, 160,  40 },
3441                 { IWI_RATE_DS5,   200,  50 },
3442                 {            6,   240,  58 },   /* XXX 3Mb/s if it existed */
3443                 { IWI_RATE_DS2,   267,  66 },
3444                 { IWI_RATE_DS1,   400, 100 },
3445                 {            0,   500, 130 },   /* unknown rate/polling */
3446         };
3447         uint32_t txrate;
3448         int j = 0;                      /* XXX silence compiler */
3449
3450         sc->sc_ledevent = ticks;        /* time of last event */
3451         if (sc->sc_blinking)            /* don't interrupt active blink */
3452                 return;
3453         switch (event) {
3454         case IWI_LED_POLL:
3455                 j = N(blinkrates)-1;
3456                 break;
3457         case IWI_LED_TX:
3458                 /* read current transmission rate from adapter */
3459                 txrate = CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE);
3460                 if (blinkrates[sc->sc_txrix].rate != txrate) {
3461                         for (j = 0; j < N(blinkrates)-1; j++)
3462                                 if (blinkrates[j].rate == txrate)
3463                                         break;
3464                         sc->sc_txrix = j;
3465                 } else
3466                         j = sc->sc_txrix;
3467                 break;
3468         case IWI_LED_RX:
3469                 if (blinkrates[sc->sc_rxrix].rate != sc->sc_rxrate) {
3470                         for (j = 0; j < N(blinkrates)-1; j++)
3471                                 if (blinkrates[j].rate == sc->sc_rxrate)
3472                                         break;
3473                         sc->sc_rxrix = j;
3474                 } else
3475                         j = sc->sc_rxrix;
3476                 break;
3477         }
3478         /* XXX beware of overflow */
3479         iwi_led_blink(sc, (blinkrates[j].timeOn * hz) / 1000,
3480                 (blinkrates[j].timeOff * hz) / 1000);
3481 #undef N
3482 }
3483
3484 static int
3485 iwi_sysctl_softled(SYSCTL_HANDLER_ARGS)
3486 {
3487         struct iwi_softc *sc = arg1;
3488         int softled = sc->sc_softled;
3489         int error;
3490
3491         error = sysctl_handle_int(oidp, &softled, 0, req);
3492         if (error || !req->newptr)
3493                 return error;
3494         softled = (softled != 0);
3495         if (softled != sc->sc_softled) {
3496                 if (softled) {
3497                         uint32_t v = iwi_read_event(sc);
3498                         v &= ~sc->sc_ledpin;
3499                         iwi_write_event(sc, iwi_toggle_event(v));
3500                 }
3501                 sc->sc_softled = softled;
3502         }
3503         return 0;
3504 }
3505
3506 static void
3507 iwi_ledattach(struct iwi_softc *sc)
3508 {
3509         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
3510         struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
3511
3512         sc->sc_blinking = 0;
3513         sc->sc_ledstate = 1;
3514         sc->sc_ledidle = (2700*hz)/1000;        /* 2.7sec */
3515         callout_init_mtx(&sc->sc_ledtimer, &sc->sc_mtx, 0);
3516
3517         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3518                 "softled", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
3519                 iwi_sysctl_softled, "I", "enable/disable software LED support");
3520         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3521                 "ledpin", CTLFLAG_RW, &sc->sc_ledpin, 0,
3522                 "pin setting to turn activity LED on");
3523         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3524                 "ledidle", CTLFLAG_RW, &sc->sc_ledidle, 0,
3525                 "idle time for inactivity LED (ticks)");
3526         /* XXX for debugging */
3527         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3528                 "nictype", CTLFLAG_RD, &sc->sc_nictype, 0,
3529                 "NIC type from EEPROM");
3530
3531         sc->sc_ledpin = IWI_RST_LED_ACTIVITY;
3532         sc->sc_softled = 1;
3533
3534         sc->sc_nictype = (iwi_read_prom_word(sc, IWI_EEPROM_NIC) >> 8) & 0xff;
3535         if (sc->sc_nictype == 1) {
3536                 /*
3537                  * NB: led's are reversed.
3538                  */
3539                 sc->sc_ledpin = IWI_RST_LED_ASSOCIATED;
3540         }
3541 }
3542
3543 static void
3544 iwi_scan_start(struct ieee80211com *ic)
3545 {
3546         /* ignore */
3547 }
3548
3549 static void
3550 iwi_set_channel(struct ieee80211com *ic)
3551 {
3552         struct ifnet *ifp = ic->ic_ifp;
3553         struct iwi_softc *sc = ifp->if_softc;
3554         if (sc->fw_state == IWI_FW_IDLE)
3555                 iwi_setcurchan(sc, ic->ic_curchan->ic_ieee);
3556 }
3557
3558 static void
3559 iwi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
3560 {
3561         struct ieee80211vap *vap = ss->ss_vap;
3562         struct ifnet *ifp = vap->iv_ic->ic_ifp;
3563         struct iwi_softc *sc = ifp->if_softc;
3564         IWI_LOCK_DECL;
3565
3566         IWI_LOCK(sc);
3567         if (iwi_scanchan(sc, maxdwell, 0))
3568                 ieee80211_cancel_scan(vap);
3569         IWI_UNLOCK(sc);
3570 }
3571
3572 static void
3573 iwi_scan_mindwell(struct ieee80211_scan_state *ss)
3574 {
3575         /* NB: don't try to abort scan; wait for firmware to finish */
3576 }
3577
3578 static void
3579 iwi_scan_end(struct ieee80211com *ic)
3580 {
3581         struct ifnet *ifp = ic->ic_ifp;
3582         struct iwi_softc *sc = ifp->if_softc;
3583         IWI_LOCK_DECL;
3584
3585         IWI_LOCK(sc);
3586         sc->flags &= ~IWI_FLAG_CHANNEL_SCAN;
3587         /* NB: make sure we're still scanning */
3588         if (sc->fw_state == IWI_FW_SCANNING)
3589                 iwi_cmd(sc, IWI_CMD_ABORT_SCAN, NULL, 0);
3590         IWI_UNLOCK(sc);
3591 }