sys/dev/netif/iwi/if_iwi.c

   1 /*-
   2  * Copyright (c) 2004, 2005
   3  *      Damien Bergamini <damien.bergamini@free.fr>. All rights reserved.
   4  * Copyright (c) 2005-2006 Sam Leffler, Errno Consulting
   5  * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice unmodified, this list of conditions, and the following
  12  *    disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/sys/dev/iwi/if_iwi.c,v 1.72 2009/07/10 15:28:33 rpaulo Exp $
  30  */
  31
  32 /*-
  33  * Intel(R) PRO/Wireless 2200BG/2225BG/2915ABG driver
  34  * http://www.intel.com/network/connectivity/products/wireless/prowireless_mobile.htm
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/sysctl.h>
  39 #include <sys/sockio.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/kernel.h>
  42 #include <sys/socket.h>
  43 #include <sys/systm.h>
  44 #include <sys/malloc.h>
  45 #include <sys/lock.h>
  46 #include <sys/mutex.h>
  47 #include <sys/module.h>
  48 #include <sys/bus.h>
  49 #include <sys/endian.h>
  50 #include <sys/proc.h>
  51 #include <sys/mount.h>
  52 #include <sys/namei.h>
  53 #include <sys/linker.h>
  54 #include <sys/firmware.h>
  55 #include <sys/taskqueue.h>
  56 #include <sys/devfs.h>
  57
  58 #include <sys/resource.h>
  59 #include <sys/rman.h>
  60
  61 #include <bus/pci/pcireg.h>
  62 #include <bus/pci/pcivar.h>
  63
  64 #include <net/bpf.h>
  65 #include <net/if.h>
  66 #include <net/if_arp.h>
  67 #include <net/ethernet.h>
  68 #include <net/if_dl.h>
  69 #include <net/if_media.h>
  70 #include <net/if_types.h>
  71 #include <net/ifq_var.h>
  72
  73 #include <netproto/802_11/ieee80211_var.h>
  74 #include <netproto/802_11/ieee80211_radiotap.h>
  75 #include <netproto/802_11/ieee80211_input.h>
  76 #include <netproto/802_11/ieee80211_regdomain.h>
  77
  78 #include <netinet/in.h>
  79 #include <netinet/in_systm.h>
  80 #include <netinet/in_var.h>
  81 #include <netinet/ip.h>
  82 #include <netinet/if_ether.h>
  83
  84 #include <dev/netif/iwi/if_iwireg.h>
  85 #include <dev/netif/iwi/if_iwivar.h>
  86
  87 #define IWI_DEBUG
  88 #ifdef IWI_DEBUG
  89 #define DPRINTF(x)      do { if (iwi_debug > 0) kprintf x; } while (0)
  90 #define DPRINTFN(n, x)  do { if (iwi_debug >= (n)) kprintf x; } while (0)
  91 int iwi_debug = 0;
  92 SYSCTL_INT(_debug, OID_AUTO, iwi, CTLFLAG_RW, &iwi_debug, 0, "iwi debug level");
  93
  94 static const char *iwi_fw_states[] = {
  95         "IDLE",                 /* IWI_FW_IDLE */
  96         "LOADING",              /* IWI_FW_LOADING */
  97         "ASSOCIATING",          /* IWI_FW_ASSOCIATING */
  98         "DISASSOCIATING",       /* IWI_FW_DISASSOCIATING */
  99         "SCANNING",             /* IWI_FW_SCANNING */
 100 };
 101 #else
 102 #define DPRINTF(x)
 103 #define DPRINTFN(n, x)
 104 #endif
 105
 106 MODULE_DEPEND(iwi, pci,  1, 1, 1);
 107 MODULE_DEPEND(iwi, wlan, 1, 1, 1);
 108 MODULE_DEPEND(iwi, firmware, 1, 1, 1);
 109
 110 enum {
 111         IWI_LED_TX,
 112         IWI_LED_RX,
 113         IWI_LED_POLL,
 114 };
 115
 116 struct iwi_ident {
 117         uint16_t        vendor;
 118         uint16_t        device;
 119         const char      *name;
 120 };
 121
 122 static const struct iwi_ident iwi_ident_table[] = {
 123         { 0x8086, 0x4220, "Intel(R) PRO/Wireless 2200BG" },
 124         { 0x8086, 0x4221, "Intel(R) PRO/Wireless 2225BG" },
 125         { 0x8086, 0x4223, "Intel(R) PRO/Wireless 2915ABG" },
 126         { 0x8086, 0x4224, "Intel(R) PRO/Wireless 2915ABG" },
 127
 128         { 0, 0, NULL }
 129 };
 130
 131 static struct ieee80211vap *iwi_vap_create(struct ieee80211com *,
 132                     const char name[IFNAMSIZ], int unit,
 133                     enum ieee80211_opmode opmode, int flags,
 134                     const uint8_t bssid[IEEE80211_ADDR_LEN],
 135                     const uint8_t mac[IEEE80211_ADDR_LEN]);
 136 static void     iwi_vap_delete(struct ieee80211vap *);
 137 static void     iwi_dma_map_addr(void *, bus_dma_segment_t *, int, int);
 138 static int      iwi_alloc_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *,
 139                     int);
 140 static void     iwi_reset_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 141 static void     iwi_free_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 142 static int      iwi_alloc_tx_ring(struct iwi_softc *, struct iwi_tx_ring *,
 143                     int, bus_addr_t, bus_addr_t);
 144 static void     iwi_reset_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 145 static void     iwi_free_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 146 static int      iwi_alloc_rx_ring(struct iwi_softc *, struct iwi_rx_ring *,
 147                     int);
 148 static void     iwi_reset_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 149 static void     iwi_free_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 150 static struct ieee80211_node *iwi_node_alloc(struct ieee80211vap *,
 151                     const uint8_t [IEEE80211_ADDR_LEN]);
 152 static void     iwi_node_free(struct ieee80211_node *);
 153 static void     iwi_media_status(struct ifnet *, struct ifmediareq *);
 154 static int      iwi_newstate(struct ieee80211vap *, enum ieee80211_state, int);
 155 static void     iwi_wme_init(struct iwi_softc *);
 156 static int      iwi_wme_setparams(struct iwi_softc *, struct ieee80211com *);
 157 static void     iwi_update_wme_task(void *, int);
 158 static int      iwi_wme_update(struct ieee80211com *);
 159 static uint16_t iwi_read_prom_word(struct iwi_softc *, uint8_t);
 160 static void     iwi_frame_intr(struct iwi_softc *, struct iwi_rx_data *, int,
 161                     struct iwi_frame *);
 162 static void     iwi_notification_intr(struct iwi_softc *, struct iwi_notif *);
 163 static void     iwi_rx_intr(struct iwi_softc *);
 164 static void     iwi_tx_intr(struct iwi_softc *, struct iwi_tx_ring *);
 165 static void     iwi_intr(void *);
 166 static int      iwi_cmd(struct iwi_softc *, uint8_t, void *, uint8_t);
 167 static void     iwi_write_ibssnode(struct iwi_softc *, const u_int8_t [], int);
 168 static int      iwi_tx_start(struct ifnet *, struct mbuf *,
 169                     struct ieee80211_node *, int);
 170 static int      iwi_raw_xmit(struct ieee80211_node *, struct mbuf *,
 171                     const struct ieee80211_bpf_params *);
 172 static void     iwi_start_locked(struct ifnet *);
 173 static void     iwi_start(struct ifnet *, struct ifaltq_subque *);
 174 static void     iwi_watchdog(void *);
 175 static int      iwi_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *ucred);
 176 static void     iwi_stop_master(struct iwi_softc *);
 177 static int      iwi_reset(struct iwi_softc *);
 178 static int      iwi_load_ucode(struct iwi_softc *, const struct iwi_fw *);
 179 static int      iwi_load_firmware(struct iwi_softc *, const struct iwi_fw *);
 180 static void     iwi_release_fw_dma(struct iwi_softc *sc);
 181 static int      iwi_config(struct iwi_softc *);
 182 static int      iwi_get_firmware(struct iwi_softc *, enum ieee80211_opmode);
 183 static void     iwi_put_firmware(struct iwi_softc *);
 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_task(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_task(void *, int);
 199 static int      iwi_getrfkill(struct iwi_softc *);
 200 static void     iwi_radio_on_task(void *, int);
 201 static void     iwi_radio_off_task(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         DEVMETHOD_END
 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, NULL, NULL);
 234
 235 static __inline uint8_t
 236 MEM_READ_1(struct iwi_softc *sc, uint32_t addr)
 237 {
 238         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 239         return CSR_READ_1(sc, IWI_CSR_INDIRECT_DATA);
 240 }
 241
 242 static __inline uint32_t
 243 MEM_READ_4(struct iwi_softc *sc, uint32_t addr)
 244 {
 245         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 246         return CSR_READ_4(sc, IWI_CSR_INDIRECT_DATA);
 247 }
 248
 249 static int
 250 iwi_probe(device_t dev)
 251 {
 252         const struct iwi_ident *ident;
 253
 254         wlan_serialize_enter();
 255         for (ident = iwi_ident_table; ident->name != NULL; ident++) {
 256                 if (pci_get_vendor(dev) == ident->vendor &&
 257                     pci_get_device(dev) == ident->device) {
 258                         device_set_desc(dev, ident->name);
 259                         wlan_serialize_exit();
 260                         return 0;
 261                 }
 262         }
 263         wlan_serialize_exit();
 264         return ENXIO;
 265 }
 266
 267 /* Base Address Register */
 268 #define IWI_PCI_BAR0    0x10
 269
 270 static int
 271 iwi_attach(device_t dev)
 272 {
 273         struct iwi_softc *sc = device_get_softc(dev);
 274         struct ifnet *ifp;
 275         struct ieee80211com *ic;
 276         uint16_t val;
 277         int i, error;
 278         uint8_t bands;
 279         uint8_t macaddr[IEEE80211_ADDR_LEN];
 280
 281         wlan_serialize_enter();
 282
 283         sc->sc_dev = dev;
 284
 285         ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211);
 286         if (ifp == NULL) {
 287                 device_printf(dev, "can not if_alloc()\n");
 288                 wlan_serialize_exit();
 289                 return ENXIO;
 290         }
 291         ic = ifp->if_l2com;
 292
 293         devfs_clone_bitmap_init(&sc->sc_unr);
 294
 295         TASK_INIT(&sc->sc_radiontask, 0, iwi_radio_on_task, sc);
 296         TASK_INIT(&sc->sc_radiofftask, 0, iwi_radio_off_task, sc);
 297         TASK_INIT(&sc->sc_restarttask, 0, iwi_restart_task, sc);
 298         TASK_INIT(&sc->sc_disassoctask, 0, iwi_disassoc_task, sc);
 299         TASK_INIT(&sc->sc_wmetask, 0, iwi_update_wme_task, sc);
 300
 301         callout_init(&sc->sc_wdtimer_callout);
 302         callout_init(&sc->sc_rftimer_callout);
 303
 304         if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
 305                 device_printf(dev, "chip is in D%d power mode "
 306                     "-- setting to D0\n", pci_get_powerstate(dev));
 307                 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
 308         }
 309
 310         pci_write_config(dev, 0x41, 0, 1);
 311
 312         /* enable bus-mastering */
 313         pci_enable_busmaster(dev);
 314
 315         sc->mem_rid = IWI_PCI_BAR0;
 316         sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid,
 317             RF_ACTIVE);
 318         if (sc->mem == NULL) {
 319                 device_printf(dev, "could not allocate memory resource\n");
 320                 goto fail;
 321         }
 322
 323         sc->sc_st = rman_get_bustag(sc->mem);
 324         sc->sc_sh = rman_get_bushandle(sc->mem);
 325
 326         sc->irq_rid = 0;
 327         sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
 328             RF_ACTIVE | RF_SHAREABLE);
 329         if (sc->irq == NULL) {
 330                 device_printf(dev, "could not allocate interrupt resource\n");
 331                 goto fail;
 332         }
 333
 334         if (iwi_reset(sc) != 0) {
 335                 device_printf(dev, "could not reset adapter\n");
 336                 goto fail;
 337         }
 338
 339         /*
 340          * Allocate rings.
 341          */
 342         if (iwi_alloc_cmd_ring(sc, &sc->cmdq, IWI_CMD_RING_COUNT) != 0) {
 343                 device_printf(dev, "could not allocate Cmd ring\n");
 344                 goto fail;
 345         }
 346
 347         for (i = 0; i < 4; i++) {
 348                 error = iwi_alloc_tx_ring(sc, &sc->txq[i], IWI_TX_RING_COUNT,
 349                     IWI_CSR_TX1_RIDX + i * 4,
 350                     IWI_CSR_TX1_WIDX + i * 4);
 351                 if (error != 0) {
 352                         device_printf(dev, "could not allocate Tx ring %d\n",
 353                                 i+i);
 354                         goto fail;
 355                 }
 356         }
 357
 358         if (iwi_alloc_rx_ring(sc, &sc->rxq, IWI_RX_RING_COUNT) != 0) {
 359                 device_printf(dev, "could not allocate Rx ring\n");
 360                 goto fail;
 361         }
 362
 363         iwi_wme_init(sc);
 364
 365         ifp->if_softc = sc;
 366         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 367         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
 368         ifp->if_init = iwi_init;
 369         ifp->if_ioctl = iwi_ioctl;
 370         ifp->if_start = iwi_start;
 371         ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
 372 #ifdef notyet
 373         ifq_set_ready(&ifp->if_snd);
 374 #endif
 375
 376         ic->ic_ifp = ifp;
 377         ic->ic_opmode = IEEE80211_M_STA;
 378         ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
 379
 380         /* set device capabilities */
 381         ic->ic_caps =
 382               IEEE80211_C_STA           /* station mode supported */
 383             | IEEE80211_C_IBSS          /* IBSS mode supported */
 384             | IEEE80211_C_MONITOR       /* monitor mode supported */
 385             | IEEE80211_C_PMGT          /* power save supported */
 386             | IEEE80211_C_SHPREAMBLE    /* short preamble supported */
 387             | IEEE80211_C_WPA           /* 802.11i */
 388             | IEEE80211_C_WME           /* 802.11e */
 389 #if 0
 390             | IEEE80211_C_BGSCAN        /* capable of bg scanning */
 391 #endif
 392             ;
 393
 394         /* read MAC address from EEPROM */
 395         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 0);
 396         macaddr[0] = val & 0xff;
 397         macaddr[1] = val >> 8;
 398         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 1);
 399         macaddr[2] = val & 0xff;
 400         macaddr[3] = val >> 8;
 401         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 2);
 402         macaddr[4] = val & 0xff;
 403         macaddr[5] = val >> 8;
 404
 405         bands = 0;
 406         setbit(&bands, IEEE80211_MODE_11B);
 407         setbit(&bands, IEEE80211_MODE_11G);
 408         if (pci_get_device(dev) >= 0x4223)
 409                 setbit(&bands, IEEE80211_MODE_11A);
 410         ieee80211_init_channels(ic, NULL, &bands);
 411
 412         ieee80211_ifattach(ic, macaddr);
 413         /* override default methods */
 414         ic->ic_node_alloc = iwi_node_alloc;
 415         sc->sc_node_free = ic->ic_node_free;
 416         ic->ic_node_free = iwi_node_free;
 417         ic->ic_raw_xmit = iwi_raw_xmit;
 418         ic->ic_scan_start = iwi_scan_start;
 419         ic->ic_scan_end = iwi_scan_end;
 420         ic->ic_set_channel = iwi_set_channel;
 421         ic->ic_scan_curchan = iwi_scan_curchan;
 422         ic->ic_scan_mindwell = iwi_scan_mindwell;
 423         ic->ic_wme.wme_update = iwi_wme_update;
 424
 425         ic->ic_vap_create = iwi_vap_create;
 426         ic->ic_vap_delete = iwi_vap_delete;
 427
 428         ieee80211_radiotap_attach(ic,
 429             &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
 430                 IWI_TX_RADIOTAP_PRESENT,
 431             &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
 432                 IWI_RX_RADIOTAP_PRESENT);
 433
 434         iwi_sysctlattach(sc);
 435         iwi_ledattach(sc);
 436
 437         /*
 438          * Hook our interrupt after all initialization is complete.
 439          */
 440         error = bus_setup_intr(dev, sc->irq, INTR_MPSAFE,
 441             iwi_intr, sc, &sc->sc_ih, &wlan_global_serializer);
 442         if (error != 0) {
 443                 device_printf(dev, "could not set up interrupt\n");
 444                 goto fail;
 445         }
 446
 447         if (bootverbose)
 448                 ieee80211_announce(ic);
 449
 450         wlan_serialize_exit();
 451         return 0;
 452 fail:
 453         /* XXX fix */
 454         wlan_serialize_exit();
 455         iwi_detach(dev);
 456         return ENXIO;
 457 }
 458
 459 static int
 460 iwi_detach(device_t dev)
 461 {
 462         struct iwi_softc *sc = device_get_softc(dev);
 463         struct ifnet *ifp = sc->sc_ifp;
 464         struct ieee80211com *ic = ifp->if_l2com;
 465
 466         wlan_serialize_enter();
 467
 468         /* NB: do early to drain any pending tasks */
 469         ieee80211_draintask(ic, &sc->sc_radiontask);
 470         ieee80211_draintask(ic, &sc->sc_radiofftask);
 471         ieee80211_draintask(ic, &sc->sc_restarttask);
 472         ieee80211_draintask(ic, &sc->sc_disassoctask);
 473
 474         iwi_stop(sc);
 475
 476         ieee80211_ifdetach(ic);
 477
 478         iwi_put_firmware(sc);
 479         iwi_release_fw_dma(sc);
 480
 481         iwi_free_cmd_ring(sc, &sc->cmdq);
 482         iwi_free_tx_ring(sc, &sc->txq[0]);
 483         iwi_free_tx_ring(sc, &sc->txq[1]);
 484         iwi_free_tx_ring(sc, &sc->txq[2]);
 485         iwi_free_tx_ring(sc, &sc->txq[3]);
 486         iwi_free_rx_ring(sc, &sc->rxq);
 487
 488         bus_teardown_intr(dev, sc->irq, sc->sc_ih);
 489         bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, sc->irq);
 490
 491         bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, sc->mem);
 492
 493         devfs_clone_bitmap_uninit(&sc->sc_unr);
 494
 495         if_free(ifp);
 496
 497         wlan_serialize_exit();
 498         return 0;
 499 }
 500
 501 static struct ieee80211vap *
 502 iwi_vap_create(struct ieee80211com *ic,
 503         const char name[IFNAMSIZ], int unit,
 504         enum ieee80211_opmode opmode, int flags,
 505         const uint8_t bssid[IEEE80211_ADDR_LEN],
 506         const uint8_t mac[IEEE80211_ADDR_LEN])
 507 {
 508         struct ifnet *ifp = ic->ic_ifp;
 509         struct iwi_softc *sc = ifp->if_softc;
 510         struct iwi_vap *ivp;
 511         struct ieee80211vap *vap;
 512         int i;
 513
 514         if (!TAILQ_EMPTY(&ic->ic_vaps))         /* only one at a time */
 515                 return NULL;
 516         /*
 517          * Get firmware image (and possibly dma memory) on mode change.
 518          */
 519         if (iwi_get_firmware(sc, opmode))
 520                 return NULL;
 521         /* allocate DMA memory for mapping firmware image */
 522         i = sc->fw_fw.size;
 523         if (sc->fw_boot.size > i)
 524                 i = sc->fw_boot.size;
 525         /* XXX do we dma the ucode as well ? */
 526         if (sc->fw_uc.size > i)
 527                 i = sc->fw_uc.size;
 528         if (iwi_init_fw_dma(sc, i))
 529                 return NULL;
 530
 531         ivp = (struct iwi_vap *) kmalloc(sizeof(struct iwi_vap),
 532             M_80211_VAP, M_WAITOK | M_ZERO);
 533         if (ivp == NULL)
 534                 return NULL;
 535         vap = &ivp->iwi_vap;
 536         ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
 537         /* override the default, the setting comes from the linux driver */
 538         vap->iv_bmissthreshold = 24;
 539         /* override with driver methods */
 540         ivp->iwi_newstate = vap->iv_newstate;
 541         vap->iv_newstate = iwi_newstate;
 542
 543         /* complete setup */
 544         ieee80211_vap_attach(vap, ieee80211_media_change, iwi_media_status);
 545         ic->ic_opmode = opmode;
 546         return vap;
 547 }
 548
 549 static void
 550 iwi_vap_delete(struct ieee80211vap *vap)
 551 {
 552         struct iwi_vap *ivp = IWI_VAP(vap);
 553
 554         ieee80211_vap_detach(vap);
 555         kfree(ivp, M_80211_VAP);
 556 }
 557
 558 static void
 559 iwi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 560 {
 561         if (error != 0)
 562                 return;
 563
 564         KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
 565
 566         *(bus_addr_t *)arg = segs[0].ds_addr;
 567 }
 568
 569 static int
 570 iwi_alloc_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring, int count)
 571 {
 572         int error;
 573
 574         ring->count = count;
 575         ring->queued = 0;
 576         ring->cur = ring->next = 0;
 577
 578         error = bus_dma_tag_create(NULL, 4, 0,
 579             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 580             count * IWI_CMD_DESC_SIZE, 1, count * IWI_CMD_DESC_SIZE,
 581             0 , &ring->desc_dmat);
 582         if (error != 0) {
 583                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 584                 goto fail;
 585         }
 586
 587         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 588             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 589         if (error != 0) {
 590                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 591                 goto fail;
 592         }
 593
 594         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 595             count * IWI_CMD_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 596         if (error != 0) {
 597                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 598                 goto fail;
 599         }
 600
 601         return 0;
 602
 603 fail:   iwi_free_cmd_ring(sc, ring);
 604         return error;
 605 }
 606
 607 static void
 608 iwi_reset_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 609 {
 610         ring->queued = 0;
 611         ring->cur = ring->next = 0;
 612 }
 613
 614 static void
 615 iwi_free_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 616 {
 617         if (ring->desc != NULL) {
 618                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 619                     BUS_DMASYNC_POSTWRITE);
 620                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 621                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 622         }
 623
 624         if (ring->desc_dmat != NULL)
 625                 bus_dma_tag_destroy(ring->desc_dmat);
 626 }
 627
 628 static int
 629 iwi_alloc_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring, int count,
 630     bus_addr_t csr_ridx, bus_addr_t csr_widx)
 631 {
 632         int i, error;
 633
 634         ring->count = count;
 635         ring->queued = 0;
 636         ring->cur = ring->next = 0;
 637         ring->csr_ridx = csr_ridx;
 638         ring->csr_widx = csr_widx;
 639
 640         error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT,
 641             BUS_SPACE_MAXADDR, NULL, NULL, count * IWI_TX_DESC_SIZE, 1,
 642             count * IWI_TX_DESC_SIZE, 0, &ring->desc_dmat);
 643         if (error != 0) {
 644                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 645                 goto fail;
 646         }
 647
 648         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 649             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 650         if (error != 0) {
 651                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 652                 goto fail;
 653         }
 654
 655         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 656             count * IWI_TX_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 657         if (error != 0) {
 658                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 659                 goto fail;
 660         }
 661
 662         ring->data = kmalloc(count * sizeof (struct iwi_tx_data), M_DEVBUF,
 663             M_WAITOK | M_ZERO);
 664
 665         error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT,
 666             BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, IWI_MAX_NSEG,
 667             MCLBYTES, 0, &ring->data_dmat);
 668         if (error != 0) {
 669                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 670                 goto fail;
 671         }
 672
 673         for (i = 0; i < count; i++) {
 674                 error = bus_dmamap_create(ring->data_dmat, 0,
 675                     &ring->data[i].map);
 676                 if (error != 0) {
 677                         device_printf(sc->sc_dev, "could not create DMA map\n");
 678                         goto fail;
 679                 }
 680         }
 681
 682         return 0;
 683
 684 fail:   iwi_free_tx_ring(sc, ring);
 685         return error;
 686 }
 687
 688 static void
 689 iwi_reset_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 690 {
 691         struct iwi_tx_data *data;
 692         int i;
 693
 694         for (i = 0; i < ring->count; i++) {
 695                 data = &ring->data[i];
 696
 697                 if (data->m != NULL) {
 698                         bus_dmamap_sync(ring->data_dmat, data->map,
 699                             BUS_DMASYNC_POSTWRITE);
 700                         bus_dmamap_unload(ring->data_dmat, data->map);
 701                         m_freem(data->m);
 702                         data->m = NULL;
 703                 }
 704
 705                 if (data->ni != NULL) {
 706                         ieee80211_free_node(data->ni);
 707                         data->ni = NULL;
 708                 }
 709         }
 710
 711         ring->queued = 0;
 712         ring->cur = ring->next = 0;
 713 }
 714
 715 static void
 716 iwi_free_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 717 {
 718         struct iwi_tx_data *data;
 719         int i;
 720
 721         if (ring->desc != NULL) {
 722                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 723                     BUS_DMASYNC_POSTWRITE);
 724                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 725                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 726         }
 727
 728         if (ring->desc_dmat != NULL)
 729                 bus_dma_tag_destroy(ring->desc_dmat);
 730
 731         if (ring->data != NULL) {
 732                 for (i = 0; i < ring->count; i++) {
 733                         data = &ring->data[i];
 734
 735                         if (data->m != NULL) {
 736                                 bus_dmamap_sync(ring->data_dmat, data->map,
 737                                     BUS_DMASYNC_POSTWRITE);
 738                                 bus_dmamap_unload(ring->data_dmat, data->map);
 739                                 m_freem(data->m);
 740                         }
 741
 742                         if (data->ni != NULL)
 743                                 ieee80211_free_node(data->ni);
 744
 745                         if (data->map != NULL)
 746                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 747                 }
 748
 749                 kfree(ring->data, M_DEVBUF);
 750         }
 751
 752         if (ring->data_dmat != NULL)
 753                 bus_dma_tag_destroy(ring->data_dmat);
 754 }
 755
 756 static int
 757 iwi_alloc_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring, int count)
 758 {
 759         struct iwi_rx_data *data;
 760         int i, error;
 761
 762         ring->count = count;
 763         ring->cur = 0;
 764
 765         ring->data = kmalloc(count * sizeof (struct iwi_rx_data), M_DEVBUF,
 766             M_WAITOK | M_ZERO);
 767
 768         error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT,
 769             BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, MCLBYTES,
 770             0, &ring->data_dmat);
 771         if (error != 0) {
 772                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 773                 goto fail;
 774         }
 775
 776         for (i = 0; i < count; i++) {
 777                 data = &ring->data[i];
 778
 779                 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
 780                 if (error != 0) {
 781                         device_printf(sc->sc_dev, "could not create DMA map\n");
 782                         goto fail;
 783                 }
 784
 785                 data->m = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
 786                 if (data->m == NULL) {
 787                         device_printf(sc->sc_dev,
 788                             "could not allocate rx mbuf\n");
 789                         error = ENOMEM;
 790                         goto fail;
 791                 }
 792
 793                 error = bus_dmamap_load(ring->data_dmat, data->map,
 794                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
 795                     &data->physaddr, 0);
 796                 if (error != 0) {
 797                         device_printf(sc->sc_dev,
 798                             "could not load rx buf DMA map");
 799                         goto fail;
 800                 }
 801
 802                 data->reg = IWI_CSR_RX_BASE + i * 4;
 803         }
 804
 805         return 0;
 806
 807 fail:   iwi_free_rx_ring(sc, ring);
 808         return error;
 809 }
 810
 811 static void
 812 iwi_reset_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 813 {
 814         ring->cur = 0;
 815 }
 816
 817 static void
 818 iwi_free_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 819 {
 820         struct iwi_rx_data *data;
 821         int i;
 822
 823         if (ring->data != NULL) {
 824                 for (i = 0; i < ring->count; i++) {
 825                         data = &ring->data[i];
 826
 827                         if (data->m != NULL) {
 828                                 bus_dmamap_sync(ring->data_dmat, data->map,
 829                                     BUS_DMASYNC_POSTREAD);
 830                                 bus_dmamap_unload(ring->data_dmat, data->map);
 831                                 m_freem(data->m);
 832                         }
 833
 834                         if (data->map != NULL)
 835                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 836                 }
 837
 838                 kfree(ring->data, M_DEVBUF);
 839         }
 840
 841         if (ring->data_dmat != NULL)
 842                 bus_dma_tag_destroy(ring->data_dmat);
 843 }
 844
 845 static int
 846 iwi_shutdown(device_t dev)
 847 {
 848         struct iwi_softc *sc = device_get_softc(dev);
 849
 850         wlan_serialize_enter();
 851         iwi_stop(sc);
 852         iwi_put_firmware(sc);           /* ??? XXX */
 853         wlan_serialize_exit();
 854
 855         return 0;
 856 }
 857
 858 static int
 859 iwi_suspend(device_t dev)
 860 {
 861         struct iwi_softc *sc = device_get_softc(dev);
 862
 863         wlan_serialize_enter();
 864         iwi_stop(sc);
 865         wlan_serialize_exit();
 866
 867         return 0;
 868 }
 869
 870 static int
 871 iwi_resume(device_t dev)
 872 {
 873         struct iwi_softc *sc = device_get_softc(dev);
 874         struct ifnet *ifp = sc->sc_ifp;
 875
 876         wlan_serialize_enter();
 877         pci_write_config(dev, 0x41, 0, 1);
 878
 879         if (ifp->if_flags & IFF_UP)
 880                 iwi_init(sc);
 881
 882         wlan_serialize_exit();
 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 = kmalloc(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         char ethstr[ETHER_ADDRSTRLEN + 1];
 907
 908         if (in->in_station != -1) {
 909                 DPRINTF(("%s mac %s station %u\n", __func__,
 910                         kether_ntoa(ni->ni_macaddr, ethstr), in->in_station));
 911                 devfs_clone_bitmap_put(&sc->sc_unr, in->in_station);
 912         }
 913
 914         sc->sc_node_free(ni);
 915 }
 916
 917 /*
 918  * Convert h/w rate code to IEEE rate code.
 919  */
 920 static int
 921 iwi_cvtrate(int iwirate)
 922 {
 923         switch (iwirate) {
 924         case IWI_RATE_DS1:      return 2;
 925         case IWI_RATE_DS2:      return 4;
 926         case IWI_RATE_DS5:      return 11;
 927         case IWI_RATE_DS11:     return 22;
 928         case IWI_RATE_OFDM6:    return 12;
 929         case IWI_RATE_OFDM9:    return 18;
 930         case IWI_RATE_OFDM12:   return 24;
 931         case IWI_RATE_OFDM18:   return 36;
 932         case IWI_RATE_OFDM24:   return 48;
 933         case IWI_RATE_OFDM36:   return 72;
 934         case IWI_RATE_OFDM48:   return 96;
 935         case IWI_RATE_OFDM54:   return 108;
 936         }
 937         return 0;
 938 }
 939
 940 /*
 941  * The firmware automatically adapts the transmit speed.  We report its current
 942  * value here.
 943  */
 944 static void
 945 iwi_media_status(struct ifnet *ifp, struct ifmediareq *imr)
 946 {
 947         struct ieee80211vap *vap = ifp->if_softc;
 948         struct ieee80211com *ic = vap->iv_ic;
 949         struct iwi_softc *sc = ic->ic_ifp->if_softc;
 950
 951         /* read current transmission rate from adapter */
 952         vap->iv_bss->ni_txrate =
 953             iwi_cvtrate(CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE));
 954         ieee80211_media_status(ifp, imr);
 955 }
 956
 957 static int
 958 iwi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 959 {
 960         struct iwi_vap *ivp = IWI_VAP(vap);
 961         struct ieee80211com *ic = vap->iv_ic;
 962         struct ifnet *ifp = ic->ic_ifp;
 963         struct iwi_softc *sc = ifp->if_softc;
 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         switch (nstate) {
 970         case IEEE80211_S_INIT:
 971                 /*
 972                  * NB: don't try to do this if iwi_stop_master has
 973                  *     shutdown the firmware and disabled interrupts.
 974                  */
 975                 if (vap->iv_state == IEEE80211_S_RUN &&
 976                     (sc->flags & IWI_FLAG_FW_INITED))
 977                         iwi_disassociate(sc, 0);
 978                 break;
 979         case IEEE80211_S_AUTH:
 980                 iwi_auth_and_assoc(sc, vap);
 981                 break;
 982         case IEEE80211_S_RUN:
 983                 if (vap->iv_opmode == IEEE80211_M_IBSS &&
 984                     vap->iv_state == IEEE80211_S_SCAN) {
 985                         /*
 986                          * XXX when joining an ibss network we are called
 987                          * with a SCAN -> RUN transition on scan complete.
 988                          * Use that to call iwi_auth_and_assoc.  On completing
 989                          * the join we are then called again with an
 990                          * AUTH -> RUN transition and we want to do nothing.
 991                          * This is all totally bogus and needs to be redone.
 992                          */
 993                         iwi_auth_and_assoc(sc, vap);
 994                 }
 995                 break;
 996         case IEEE80211_S_ASSOC:
 997                 /*
 998                  * If we are transitioning from AUTH then just wait
 999                  * for the ASSOC status to come back from the firmware.
1000                  * Otherwise we need to issue the association request.
1001                  */
1002                 if (vap->iv_state == IEEE80211_S_AUTH)
1003                         break;
1004                 iwi_auth_and_assoc(sc, vap);
1005                 break;
1006         default:
1007                 break;
1008         }
1009
1010         return ivp->iwi_newstate(vap, nstate, arg);
1011 }
1012
1013 /*
1014  * WME parameters coming from IEEE 802.11e specification.  These values are
1015  * already declared in ieee80211_proto.c, but they are static so they can't
1016  * be reused here.
1017  */
1018 static const struct wmeParams iwi_wme_cck_params[WME_NUM_AC] = {
1019         { 0, 3, 5,  7,   0 },   /* WME_AC_BE */
1020         { 0, 3, 5, 10,   0 },   /* WME_AC_BK */
1021         { 0, 2, 4,  5, 188 },   /* WME_AC_VI */
1022         { 0, 2, 3,  4, 102 }    /* WME_AC_VO */
1023 };
1024
1025 static const struct wmeParams iwi_wme_ofdm_params[WME_NUM_AC] = {
1026         { 0, 3, 4,  6,   0 },   /* WME_AC_BE */
1027         { 0, 3, 4, 10,   0 },   /* WME_AC_BK */
1028         { 0, 2, 3,  4,  94 },   /* WME_AC_VI */
1029         { 0, 2, 2,  3,  47 }    /* WME_AC_VO */
1030 };
1031 #define IWI_EXP2(v)     htole16((1 << (v)) - 1)
1032 #define IWI_USEC(v)     htole16(IEEE80211_TXOP_TO_US(v))
1033
1034 static void
1035 iwi_wme_init(struct iwi_softc *sc)
1036 {
1037         const struct wmeParams *wmep;
1038         int ac;
1039
1040         memset(sc->wme, 0, sizeof sc->wme);
1041         for (ac = 0; ac < WME_NUM_AC; ac++) {
1042                 /* set WME values for CCK modulation */
1043                 wmep = &iwi_wme_cck_params[ac];
1044                 sc->wme[1].aifsn[ac] = wmep->wmep_aifsn;
1045                 sc->wme[1].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1046                 sc->wme[1].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1047                 sc->wme[1].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1048                 sc->wme[1].acm[ac]   = wmep->wmep_acm;
1049
1050                 /* set WME values for OFDM modulation */
1051                 wmep = &iwi_wme_ofdm_params[ac];
1052                 sc->wme[2].aifsn[ac] = wmep->wmep_aifsn;
1053                 sc->wme[2].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1054                 sc->wme[2].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1055                 sc->wme[2].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1056                 sc->wme[2].acm[ac]   = wmep->wmep_acm;
1057         }
1058 }
1059
1060 static int
1061 iwi_wme_setparams(struct iwi_softc *sc, struct ieee80211com *ic)
1062 {
1063         const struct wmeParams *wmep;
1064         int ac;
1065
1066         for (ac = 0; ac < WME_NUM_AC; ac++) {
1067                 /* set WME values for current operating mode */
1068                 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac];
1069                 sc->wme[0].aifsn[ac] = wmep->wmep_aifsn;
1070                 sc->wme[0].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1071                 sc->wme[0].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1072                 sc->wme[0].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1073                 sc->wme[0].acm[ac]   = wmep->wmep_acm;
1074         }
1075
1076         DPRINTF(("Setting WME parameters\n"));
1077         return iwi_cmd(sc, IWI_CMD_SET_WME_PARAMS, sc->wme, sizeof sc->wme);
1078 }
1079 #undef IWI_USEC
1080 #undef IWI_EXP2
1081
1082 static void
1083 iwi_update_wme_task(void *arg, int npending)
1084 {
1085         struct ieee80211com *ic = arg;
1086         struct iwi_softc *sc = ic->ic_ifp->if_softc;
1087
1088         wlan_serialize_enter();
1089         (void) iwi_wme_setparams(sc, ic);
1090         wlan_serialize_exit();
1091 }
1092
1093 static int
1094 iwi_wme_update(struct ieee80211com *ic)
1095 {
1096         struct iwi_softc *sc = ic->ic_ifp->if_softc;
1097         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1098
1099         /*
1100          * We may be called to update the WME parameters in
1101          * the adapter at various places.  If we're already
1102          * associated then initiate the request immediately;
1103          * otherwise we assume the params will get sent down
1104          * to the adapter as part of the work iwi_auth_and_assoc
1105          * does.
1106          */
1107         if (vap->iv_state == IEEE80211_S_RUN)
1108                 ieee80211_runtask(ic, &sc->sc_wmetask);
1109         return (0);
1110 }
1111
1112 static int
1113 iwi_wme_setie(struct iwi_softc *sc)
1114 {
1115         struct ieee80211_wme_info wme;
1116
1117         memset(&wme, 0, sizeof wme);
1118         wme.wme_id = IEEE80211_ELEMID_VENDOR;
1119         wme.wme_len = sizeof (struct ieee80211_wme_info) - 2;
1120         wme.wme_oui[0] = 0x00;
1121         wme.wme_oui[1] = 0x50;
1122         wme.wme_oui[2] = 0xf2;
1123         wme.wme_type = WME_OUI_TYPE;
1124         wme.wme_subtype = WME_INFO_OUI_SUBTYPE;
1125         wme.wme_version = WME_VERSION;
1126         wme.wme_info = 0;
1127
1128         DPRINTF(("Setting WME IE (len=%u)\n", wme.wme_len));
1129         return iwi_cmd(sc, IWI_CMD_SET_WMEIE, &wme, sizeof wme);
1130 }
1131
1132 /*
1133  * Read 16 bits at address 'addr' from the serial EEPROM.
1134  */
1135 static uint16_t
1136 iwi_read_prom_word(struct iwi_softc *sc, uint8_t addr)
1137 {
1138         uint32_t tmp;
1139         uint16_t val;
1140         int n;
1141
1142         /* clock C once before the first command */
1143         IWI_EEPROM_CTL(sc, 0);
1144         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1145         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1146         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1147
1148         /* write start bit (1) */
1149         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1150         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1151
1152         /* write READ opcode (10) */
1153         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1154         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1155         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1156         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1157
1158         /* write address A7-A0 */
1159         for (n = 7; n >= 0; n--) {
1160                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1161                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D));
1162                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1163                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D) | IWI_EEPROM_C);
1164         }
1165
1166         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1167
1168         /* read data Q15-Q0 */
1169         val = 0;
1170         for (n = 15; n >= 0; n--) {
1171                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1172                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1173                 tmp = MEM_READ_4(sc, IWI_MEM_EEPROM_CTL);
1174                 val |= ((tmp & IWI_EEPROM_Q) >> IWI_EEPROM_SHIFT_Q) << n;
1175         }
1176
1177         IWI_EEPROM_CTL(sc, 0);
1178
1179         /* clear Chip Select and clock C */
1180         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1181         IWI_EEPROM_CTL(sc, 0);
1182         IWI_EEPROM_CTL(sc, IWI_EEPROM_C);
1183
1184         return val;
1185 }
1186
1187 static void
1188 iwi_setcurchan(struct iwi_softc *sc, int chan)
1189 {
1190         struct ifnet *ifp = sc->sc_ifp;
1191         struct ieee80211com *ic = ifp->if_l2com;
1192
1193         sc->curchan = chan;
1194         ieee80211_radiotap_chan_change(ic);
1195 }
1196
1197 static void
1198 iwi_frame_intr(struct iwi_softc *sc, struct iwi_rx_data *data, int i,
1199     struct iwi_frame *frame)
1200 {
1201         struct ifnet *ifp = sc->sc_ifp;
1202         struct ieee80211com *ic = ifp->if_l2com;
1203         struct mbuf *mnew, *m;
1204         struct ieee80211_node *ni;
1205         int type, error, framelen;
1206         int8_t rssi, nf;
1207
1208         framelen = le16toh(frame->len);
1209         if (framelen < IEEE80211_MIN_LEN || framelen > MCLBYTES) {
1210                 /*
1211                  * XXX >MCLBYTES is bogus as it means the h/w dma'd
1212                  *     out of bounds; need to figure out how to limit
1213                  *     frame size in the firmware
1214                  */
1215                 /* XXX stat */
1216                 DPRINTFN(1,
1217                     ("drop rx frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1218                     le16toh(frame->len), frame->chan, frame->rssi,
1219                     frame->rssi_dbm));
1220                 return;
1221         }
1222
1223         DPRINTFN(5, ("received frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1224             le16toh(frame->len), frame->chan, frame->rssi, frame->rssi_dbm));
1225
1226         if (frame->chan != sc->curchan)
1227                 iwi_setcurchan(sc, frame->chan);
1228
1229         /*
1230          * Try to allocate a new mbuf for this ring element and load it before
1231          * processing the current mbuf. If the ring element cannot be loaded,
1232          * drop the received packet and reuse the old mbuf. In the unlikely
1233          * case that the old mbuf can't be reloaded either, explicitly panic.
1234          */
1235         mnew = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
1236         if (mnew == NULL) {
1237                 IFNET_STAT_INC(ifp, ierrors, 1);
1238                 return;
1239         }
1240
1241         bus_dmamap_unload(sc->rxq.data_dmat, data->map);
1242
1243         error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1244             mtod(mnew, void *), MCLBYTES, iwi_dma_map_addr, &data->physaddr,
1245             0);
1246         if (error != 0) {
1247                 m_freem(mnew);
1248
1249                 /* try to reload the old mbuf */
1250                 error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1251                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
1252                     &data->physaddr, 0);
1253                 if (error != 0) {
1254                         /* very unlikely that it will fail... */
1255                         panic("%s: could not load old rx mbuf",
1256                             device_get_name(sc->sc_dev));
1257                 }
1258                 IFNET_STAT_INC(ifp, ierrors, 1);
1259                 return;
1260         }
1261
1262         /*
1263          * New mbuf successfully loaded, update Rx ring and continue
1264          * processing.
1265          */
1266         m = data->m;
1267         data->m = mnew;
1268         CSR_WRITE_4(sc, data->reg, data->physaddr);
1269
1270         /* finalize mbuf */
1271         m->m_pkthdr.rcvif = ifp;
1272         m->m_pkthdr.len = m->m_len = sizeof (struct iwi_hdr) +
1273             sizeof (struct iwi_frame) + framelen;
1274
1275         m_adj(m, sizeof (struct iwi_hdr) + sizeof (struct iwi_frame));
1276
1277         rssi = frame->rssi_dbm;
1278         nf = -95;
1279         if (ieee80211_radiotap_active(ic)) {
1280                 struct iwi_rx_radiotap_header *tap = &sc->sc_rxtap;
1281
1282                 tap->wr_flags = 0;
1283                 tap->wr_antsignal = rssi;
1284                 tap->wr_antnoise = nf;
1285                 tap->wr_rate = iwi_cvtrate(frame->rate);
1286                 tap->wr_antenna = frame->antenna;
1287         }
1288
1289         ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *));
1290         if (ni != NULL) {
1291                 type = ieee80211_input(ni, m, rssi, nf);
1292                 ieee80211_free_node(ni);
1293         } else
1294                 type = ieee80211_input_all(ic, m, rssi, nf);
1295
1296         if (sc->sc_softled) {
1297                 /*
1298                  * Blink for any data frame.  Otherwise do a
1299                  * heartbeat-style blink when idle.  The latter
1300                  * is mainly for station mode where we depend on
1301                  * periodic beacon frames to trigger the poll event.
1302                  */
1303                 if (type == IEEE80211_FC0_TYPE_DATA) {
1304                         sc->sc_rxrate = frame->rate;
1305                         iwi_led_event(sc, IWI_LED_RX);
1306                 } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle)
1307                         iwi_led_event(sc, IWI_LED_POLL);
1308         }
1309 }
1310
1311 /*
1312  * Check for an association response frame to see if QoS
1313  * has been negotiated.  We parse just enough to figure
1314  * out if we're supposed to use QoS.  The proper solution
1315  * is to pass the frame up so ieee80211_input can do the
1316  * work but that's made hard by how things currently are
1317  * done in the driver.
1318  */
1319 static void
1320 iwi_checkforqos(struct ieee80211vap *vap,
1321         const struct ieee80211_frame *wh, int len)
1322 {
1323 #define SUBTYPE(wh)     ((wh)->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
1324         const uint8_t *frm, *efrm, *wme;
1325         struct ieee80211_node *ni;
1326         uint16_t capinfo, associd;
1327
1328         /* NB: +8 for capinfo, status, associd, and first ie */
1329         if (!(sizeof(*wh)+8 < len && len < IEEE80211_MAX_LEN) ||
1330             SUBTYPE(wh) != IEEE80211_FC0_SUBTYPE_ASSOC_RESP)
1331                 return;
1332         /*
1333          * asresp frame format
1334          *      [2] capability information
1335          *      [2] status
1336          *      [2] association ID
1337          *      [tlv] supported rates
1338          *      [tlv] extended supported rates
1339          *      [tlv] WME
1340          */
1341         frm = (const uint8_t *)&wh[1];
1342         efrm = ((const uint8_t *) wh) + len;
1343
1344         capinfo = le16toh(*(const uint16_t *)frm);
1345         frm += 2;
1346         frm += 2;
1347         associd = le16toh(*(const uint16_t *)frm);
1348         frm += 2;
1349
1350         wme = NULL;
1351         while (frm < efrm) {
1352                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1], return);
1353                 switch (*frm) {
1354                 case IEEE80211_ELEMID_VENDOR:
1355                         if (iswmeoui(frm))
1356                                 wme = frm;
1357                         break;
1358                 }
1359                 frm += frm[1] + 2;
1360         }
1361
1362         ni = vap->iv_bss;
1363         ni->ni_capinfo = capinfo;
1364         ni->ni_associd = associd;
1365         if (wme != NULL)
1366                 ni->ni_flags |= IEEE80211_NODE_QOS;
1367         else
1368                 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1369 #undef SUBTYPE
1370 }
1371
1372 /*
1373  * Task queue callbacks for iwi_notification_intr used to avoid LOR's.
1374  */
1375
1376 static void
1377 iwi_notification_intr(struct iwi_softc *sc, struct iwi_notif *notif)
1378 {
1379         struct ifnet *ifp = sc->sc_ifp;
1380         struct ieee80211com *ic = ifp->if_l2com;
1381         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1382         struct iwi_notif_scan_channel *chan;
1383         struct iwi_notif_scan_complete *scan;
1384         struct iwi_notif_authentication *auth;
1385         struct iwi_notif_association *assoc;
1386         struct iwi_notif_beacon_state *beacon;
1387
1388         switch (notif->type) {
1389         case IWI_NOTIF_TYPE_SCAN_CHANNEL:
1390                 chan = (struct iwi_notif_scan_channel *)(notif + 1);
1391
1392                 DPRINTFN(3, ("Scan of channel %u complete (%u)\n",
1393                     ieee80211_ieee2mhz(chan->nchan, 0), chan->nchan));
1394
1395                 /* Reset the timer, the scan is still going */
1396                 sc->sc_state_timer = 3;
1397                 break;
1398
1399         case IWI_NOTIF_TYPE_SCAN_COMPLETE:
1400                 scan = (struct iwi_notif_scan_complete *)(notif + 1);
1401
1402                 DPRINTFN(2, ("Scan completed (%u, %u)\n", scan->nchan,
1403                     scan->status));
1404
1405                 IWI_STATE_END(sc, IWI_FW_SCANNING);
1406
1407                 if (scan->status == IWI_SCAN_COMPLETED) {
1408                         /* NB: don't need to defer, net80211 does it for us */
1409                         ieee80211_scan_next(vap);
1410                 }
1411                 break;
1412
1413         case IWI_NOTIF_TYPE_AUTHENTICATION:
1414                 auth = (struct iwi_notif_authentication *)(notif + 1);
1415                 switch (auth->state) {
1416                 case IWI_AUTH_SUCCESS:
1417                         DPRINTFN(2, ("Authentication succeeeded\n"));
1418                         ieee80211_new_state(vap, IEEE80211_S_ASSOC, -1);
1419                         break;
1420                 case IWI_AUTH_FAIL:
1421                         /*
1422                          * These are delivered as an unsolicited deauth
1423                          * (e.g. due to inactivity) or in response to an
1424                          * associate request.
1425                          */
1426                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1427                         if (vap->iv_state != IEEE80211_S_RUN) {
1428                                 DPRINTFN(2, ("Authentication failed\n"));
1429                                 vap->iv_stats.is_rx_auth_fail++;
1430                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1431                         } else {
1432                                 DPRINTFN(2, ("Deauthenticated\n"));
1433                                 vap->iv_stats.is_rx_deauth++;
1434                         }
1435                         ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1436                         break;
1437                 case IWI_AUTH_SENT_1:
1438                 case IWI_AUTH_RECV_2:
1439                 case IWI_AUTH_SEQ1_PASS:
1440                         break;
1441                 case IWI_AUTH_SEQ1_FAIL:
1442                         DPRINTFN(2, ("Initial authentication handshake failed; "
1443                                 "you probably need shared key\n"));
1444                         vap->iv_stats.is_rx_auth_fail++;
1445                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1446                         /* XXX retry shared key when in auto */
1447                         break;
1448                 default:
1449                         device_printf(sc->sc_dev,
1450                             "unknown authentication state %u\n", auth->state);
1451                         break;
1452                 }
1453                 break;
1454
1455         case IWI_NOTIF_TYPE_ASSOCIATION:
1456                 assoc = (struct iwi_notif_association *)(notif + 1);
1457                 switch (assoc->state) {
1458                 case IWI_AUTH_SUCCESS:
1459                         /* re-association, do nothing */
1460                         break;
1461                 case IWI_ASSOC_SUCCESS:
1462                         DPRINTFN(2, ("Association succeeded\n"));
1463                         sc->flags |= IWI_FLAG_ASSOCIATED;
1464                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1465                         iwi_checkforqos(vap,
1466                             (const struct ieee80211_frame *)(assoc+1),
1467                             le16toh(notif->len) - sizeof(*assoc));
1468                         ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
1469                         break;
1470                 case IWI_ASSOC_INIT:
1471                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1472                         switch (sc->fw_state) {
1473                         case IWI_FW_ASSOCIATING:
1474                                 DPRINTFN(2, ("Association failed\n"));
1475                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1476                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1477                                 break;
1478
1479                         case IWI_FW_DISASSOCIATING:
1480                                 DPRINTFN(2, ("Dissassociated\n"));
1481                                 IWI_STATE_END(sc, IWI_FW_DISASSOCIATING);
1482                                 vap->iv_stats.is_rx_disassoc++;
1483                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1484                                 break;
1485                         }
1486                         break;
1487                 default:
1488                         device_printf(sc->sc_dev,
1489                             "unknown association state %u\n", assoc->state);
1490                         break;
1491                 }
1492                 break;
1493
1494         case IWI_NOTIF_TYPE_BEACON:
1495                 /* XXX check struct length */
1496                 beacon = (struct iwi_notif_beacon_state *)(notif + 1);
1497
1498                 DPRINTFN(5, ("Beacon state (%u, %u)\n",
1499                     beacon->state, le32toh(beacon->number)));
1500
1501                 if (beacon->state == IWI_BEACON_MISS) {
1502                         /*
1503                          * The firmware notifies us of every beacon miss
1504                          * so we need to track the count against the
1505                          * configured threshold before notifying the
1506                          * 802.11 layer.
1507                          * XXX try to roam, drop assoc only on much higher count
1508                          */
1509                         if (le32toh(beacon->number) >= vap->iv_bmissthreshold) {
1510                                 DPRINTF(("Beacon miss: %u >= %u\n",
1511                                     le32toh(beacon->number),
1512                                     vap->iv_bmissthreshold));
1513                                 vap->iv_stats.is_beacon_miss++;
1514                                 /*
1515                                  * It's pointless to notify the 802.11 layer
1516                                  * as it'll try to send a probe request (which
1517                                  * we'll discard) and then timeout and drop us
1518                                  * into scan state.  Instead tell the firmware
1519                                  * to disassociate and then on completion we'll
1520                                  * kick the state machine to scan.
1521                                  */
1522                                 ieee80211_runtask(ic, &sc->sc_disassoctask);
1523                         }
1524                 }
1525                 break;
1526
1527         case IWI_NOTIF_TYPE_CALIBRATION:
1528         case IWI_NOTIF_TYPE_NOISE:
1529         case IWI_NOTIF_TYPE_LINK_QUALITY:
1530                 DPRINTFN(5, ("Notification (%u)\n", notif->type));
1531                 break;
1532
1533         default:
1534                 DPRINTF(("unknown notification type %u flags 0x%x len %u\n",
1535                     notif->type, notif->flags, le16toh(notif->len)));
1536                 break;
1537         }
1538 }
1539
1540 static void
1541 iwi_rx_intr(struct iwi_softc *sc)
1542 {
1543         struct iwi_rx_data *data;
1544         struct iwi_hdr *hdr;
1545         uint32_t hw;
1546
1547         hw = CSR_READ_4(sc, IWI_CSR_RX_RIDX);
1548
1549         for (; sc->rxq.cur != hw;) {
1550                 data = &sc->rxq.data[sc->rxq.cur];
1551
1552                 bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1553                     BUS_DMASYNC_POSTREAD);
1554
1555                 hdr = mtod(data->m, struct iwi_hdr *);
1556
1557                 switch (hdr->type) {
1558                 case IWI_HDR_TYPE_FRAME:
1559                         iwi_frame_intr(sc, data, sc->rxq.cur,
1560                             (struct iwi_frame *)(hdr + 1));
1561                         break;
1562
1563                 case IWI_HDR_TYPE_NOTIF:
1564                         iwi_notification_intr(sc,
1565                             (struct iwi_notif *)(hdr + 1));
1566                         break;
1567
1568                 default:
1569                         device_printf(sc->sc_dev, "unknown hdr type %u\n",
1570                             hdr->type);
1571                 }
1572
1573                 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur));
1574
1575                 sc->rxq.cur = (sc->rxq.cur + 1) % IWI_RX_RING_COUNT;
1576         }
1577
1578         /* tell the firmware what we have processed */
1579         hw = (hw == 0) ? IWI_RX_RING_COUNT - 1 : hw - 1;
1580         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, hw);
1581 }
1582
1583 static void
1584 iwi_tx_intr(struct iwi_softc *sc, struct iwi_tx_ring *txq)
1585 {
1586         struct ifnet *ifp = sc->sc_ifp;
1587         struct iwi_tx_data *data;
1588         uint32_t hw;
1589
1590         hw = CSR_READ_4(sc, txq->csr_ridx);
1591
1592         for (; txq->next != hw;) {
1593                 data = &txq->data[txq->next];
1594
1595                 bus_dmamap_sync(txq->data_dmat, data->map,
1596                     BUS_DMASYNC_POSTWRITE);
1597                 bus_dmamap_unload(txq->data_dmat, data->map);
1598                 if (data->m->m_flags & M_TXCB)
1599                         ieee80211_process_callback(data->ni, data->m, 0/*XXX*/);
1600                 m_freem(data->m);
1601                 data->m = NULL;
1602                 ieee80211_free_node(data->ni);
1603                 data->ni = NULL;
1604
1605                 DPRINTFN(15, ("tx done idx=%u\n", txq->next));
1606
1607                 IFNET_STAT_INC(ifp, opackets, 1);
1608
1609                 txq->queued--;
1610                 txq->next = (txq->next + 1) % IWI_TX_RING_COUNT;
1611         }
1612
1613         sc->sc_tx_timer = 0;
1614         ifq_clr_oactive(&ifp->if_snd);
1615
1616         if (sc->sc_softled)
1617                 iwi_led_event(sc, IWI_LED_TX);
1618
1619         iwi_start_locked(ifp);
1620 }
1621
1622 static void
1623 iwi_fatal_error_intr(struct iwi_softc *sc)
1624 {
1625         struct ifnet *ifp = sc->sc_ifp;
1626         struct ieee80211com *ic = ifp->if_l2com;
1627         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1628
1629         device_printf(sc->sc_dev, "firmware error\n");
1630         if (vap != NULL)
1631                 ieee80211_cancel_scan(vap);
1632         ieee80211_runtask(ic, &sc->sc_restarttask);
1633
1634         sc->flags &= ~IWI_FLAG_BUSY;
1635         sc->sc_busy_timer = 0;
1636         wakeup(sc);
1637 }
1638
1639 static void
1640 iwi_radio_off_intr(struct iwi_softc *sc)
1641 {
1642         struct ifnet *ifp = sc->sc_ifp;
1643         struct ieee80211com *ic = ifp->if_l2com;
1644
1645         ieee80211_runtask(ic, &sc->sc_radiofftask);
1646 }
1647
1648 static void
1649 iwi_intr(void *arg)
1650 {
1651         struct iwi_softc *sc = arg;
1652         uint32_t r;
1653
1654         if ((r = CSR_READ_4(sc, IWI_CSR_INTR)) == 0 || r == 0xffffffff) {
1655                 return;
1656         }
1657
1658         /* acknowledge interrupts */
1659         CSR_WRITE_4(sc, IWI_CSR_INTR, r);
1660
1661         if (r & IWI_INTR_FATAL_ERROR) {
1662                 iwi_fatal_error_intr(sc);
1663                 return;
1664         }
1665
1666         if (r & IWI_INTR_FW_INITED) {
1667                 if (!(r & (IWI_INTR_FATAL_ERROR | IWI_INTR_PARITY_ERROR)))
1668                         wakeup(sc);
1669         }
1670
1671         if (r & IWI_INTR_RADIO_OFF)
1672                 iwi_radio_off_intr(sc);
1673
1674         if (r & IWI_INTR_CMD_DONE) {
1675                 sc->flags &= ~IWI_FLAG_BUSY;
1676                 sc->sc_busy_timer = 0;
1677                 wakeup(sc);
1678         }
1679
1680         if (r & IWI_INTR_TX1_DONE)
1681                 iwi_tx_intr(sc, &sc->txq[0]);
1682
1683         if (r & IWI_INTR_TX2_DONE)
1684                 iwi_tx_intr(sc, &sc->txq[1]);
1685
1686         if (r & IWI_INTR_TX3_DONE)
1687                 iwi_tx_intr(sc, &sc->txq[2]);
1688
1689         if (r & IWI_INTR_TX4_DONE)
1690                 iwi_tx_intr(sc, &sc->txq[3]);
1691
1692         if (r & IWI_INTR_RX_DONE)
1693                 iwi_rx_intr(sc);
1694
1695         if (r & IWI_INTR_PARITY_ERROR) {
1696                 /* XXX rate-limit */
1697                 device_printf(sc->sc_dev, "parity error\n");
1698         }
1699 }
1700
1701 static int
1702 iwi_cmd(struct iwi_softc *sc, uint8_t type, void *data, uint8_t len)
1703 {
1704         struct iwi_cmd_desc *desc;
1705
1706         if (sc->flags & IWI_FLAG_BUSY) {
1707                 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n",
1708                         __func__, type);
1709                 return EAGAIN;
1710         }
1711
1712         sc->flags |= IWI_FLAG_BUSY;
1713         sc->sc_busy_timer = 2;
1714
1715         desc = &sc->cmdq.desc[sc->cmdq.cur];
1716
1717         desc->hdr.type = IWI_HDR_TYPE_COMMAND;
1718         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1719         desc->type = type;
1720         desc->len = len;
1721         memcpy(desc->data, data, len);
1722
1723         bus_dmamap_sync(sc->cmdq.desc_dmat, sc->cmdq.desc_map,
1724             BUS_DMASYNC_PREWRITE);
1725
1726         DPRINTFN(2, ("sending command idx=%u type=%u len=%u\n", sc->cmdq.cur,
1727             type, len));
1728
1729         sc->cmdq.cur = (sc->cmdq.cur + 1) % IWI_CMD_RING_COUNT;
1730         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
1731
1732         return zsleep(sc, &wlan_global_serializer, 0, "iwicmd", hz);
1733 }
1734
1735 static void
1736 iwi_write_ibssnode(struct iwi_softc *sc,
1737         const u_int8_t addr[IEEE80211_ADDR_LEN], int entry)
1738 {
1739         struct iwi_ibssnode node;
1740         char ethstr[ETHER_ADDRSTRLEN + 1];
1741
1742         /* write node information into NIC memory */
1743         memset(&node, 0, sizeof node);
1744         IEEE80211_ADDR_COPY(node.bssid, addr);
1745
1746         DPRINTF(("%s mac %s station %u\n", __func__, kether_ntoa(node.bssid, ethstr), entry));
1747
1748         CSR_WRITE_REGION_1(sc,
1749             IWI_CSR_NODE_BASE + entry * sizeof node,
1750             (uint8_t *)&node, sizeof node);
1751 }
1752
1753 static int
1754 iwi_tx_start(struct ifnet *ifp, struct mbuf *m0, struct ieee80211_node *ni,
1755     int ac)
1756 {
1757         struct iwi_softc *sc = ifp->if_softc;
1758         struct ieee80211vap *vap = ni->ni_vap;
1759         struct ieee80211com *ic = ni->ni_ic;
1760         struct iwi_node *in = (struct iwi_node *)ni;
1761         const struct ieee80211_frame *wh;
1762         struct ieee80211_key *k;
1763         const struct chanAccParams *cap;
1764         struct iwi_tx_ring *txq = &sc->txq[ac];
1765         struct iwi_tx_data *data;
1766         struct iwi_tx_desc *desc;
1767         struct mbuf *mnew;
1768         bus_dma_segment_t segs[IWI_MAX_NSEG];
1769         int error, nsegs, hdrlen, i;
1770         int ismcast, flags, xflags, staid;
1771
1772         wh = mtod(m0, const struct ieee80211_frame *);
1773         /* NB: only data frames use this path */
1774         hdrlen = ieee80211_hdrsize(wh);
1775         ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1776         flags = xflags = 0;
1777
1778         if (!ismcast)
1779                 flags |= IWI_DATA_FLAG_NEED_ACK;
1780         if (vap->iv_flags & IEEE80211_F_SHPREAMBLE)
1781                 flags |= IWI_DATA_FLAG_SHPREAMBLE;
1782         if (IEEE80211_QOS_HAS_SEQ(wh)) {
1783                 xflags |= IWI_DATA_XFLAG_QOS;
1784                 cap = &ic->ic_wme.wme_chanParams;
1785                 if (!cap->cap_wmeParams[ac].wmep_noackPolicy)
1786                         flags &= ~IWI_DATA_FLAG_NEED_ACK;
1787         }
1788
1789         /*
1790          * This is only used in IBSS mode where the firmware expect an index
1791          * in a h/w table instead of a destination address.
1792          */
1793         if (vap->iv_opmode == IEEE80211_M_IBSS) {
1794                 if (!ismcast) {
1795                         if (in->in_station == -1) {
1796                                 in->in_station = devfs_clone_bitmap_get(&sc->sc_unr,
1797                                         IWI_MAX_IBSSNODE-1);
1798                                 if (in->in_station == -1) {
1799                                         /* h/w table is full */
1800                                         m_freem(m0);
1801                                         ieee80211_free_node(ni);
1802                                         IFNET_STAT_INC(ifp, oerrors, 1);
1803                                         return 0;
1804                                 }
1805                                 iwi_write_ibssnode(sc,
1806                                         ni->ni_macaddr, in->in_station);
1807                         }
1808                         staid = in->in_station;
1809                 } else {
1810                         /*
1811                          * Multicast addresses have no associated node
1812                          * so there will be no station entry.  We reserve
1813                          * entry 0 for one mcast address and use that.
1814                          * If there are many being used this will be
1815                          * expensive and we'll need to do a better job
1816                          * but for now this handles the broadcast case.
1817                          */
1818                         if (!IEEE80211_ADDR_EQ(wh->i_addr1, sc->sc_mcast)) {
1819                                 IEEE80211_ADDR_COPY(sc->sc_mcast, wh->i_addr1);
1820                                 iwi_write_ibssnode(sc, sc->sc_mcast, 0);
1821                         }
1822                         staid = 0;
1823                 }
1824         } else
1825                 staid = 0;
1826
1827         if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1828                 k = ieee80211_crypto_encap(ni, m0);
1829                 if (k == NULL) {
1830                         m_freem(m0);
1831                         return ENOBUFS;
1832                 }
1833
1834                 /* packet header may have moved, reset our local pointer */
1835                 wh = mtod(m0, struct ieee80211_frame *);
1836         }
1837
1838         if (ieee80211_radiotap_active_vap(vap)) {
1839                 struct iwi_tx_radiotap_header *tap = &sc->sc_txtap;
1840
1841                 tap->wt_flags = 0;
1842
1843                 ieee80211_radiotap_tx(vap, m0);
1844         }
1845
1846         data = &txq->data[txq->cur];
1847         desc = &txq->desc[txq->cur];
1848
1849         /* save and trim IEEE802.11 header */
1850         m_copydata(m0, 0, hdrlen, (caddr_t)&desc->wh);
1851         m_adj(m0, hdrlen);
1852
1853         error = bus_dmamap_load_mbuf_segment(txq->data_dmat, data->map,
1854             m0, segs, 1, &nsegs, BUS_DMA_NOWAIT);
1855         if (error != 0 && error != EFBIG) {
1856                 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1857                     error);
1858                 m_freem(m0);
1859                 return error;
1860         }
1861         if (error != 0) {
1862                 mnew = m_defrag(m0, MB_DONTWAIT);
1863                 if (mnew == NULL) {
1864                         device_printf(sc->sc_dev,
1865                             "could not defragment mbuf\n");
1866                         m_freem(m0);
1867                         return ENOBUFS;
1868                 }
1869                 m0 = mnew;
1870
1871                 error = bus_dmamap_load_mbuf_segment(txq->data_dmat,
1872                     data->map, m0, segs, 1, &nsegs, BUS_DMA_NOWAIT);
1873                 if (error != 0) {
1874                         device_printf(sc->sc_dev,
1875                             "could not map mbuf (error %d)\n", error);
1876                         m_freem(m0);
1877                         return error;
1878                 }
1879         }
1880
1881         data->m = m0;
1882         data->ni = ni;
1883
1884         desc->hdr.type = IWI_HDR_TYPE_DATA;
1885         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1886         desc->station = staid;
1887         desc->cmd = IWI_DATA_CMD_TX;
1888         desc->len = htole16(m0->m_pkthdr.len);
1889         desc->flags = flags;
1890         desc->xflags = xflags;
1891
1892 #if 0
1893         if (vap->iv_flags & IEEE80211_F_PRIVACY)
1894                 desc->wep_txkey = vap->iv_def_txkey;
1895         else
1896 #endif
1897                 desc->flags |= IWI_DATA_FLAG_NO_WEP;
1898
1899         desc->nseg = htole32(nsegs);
1900         for (i = 0; i < nsegs; i++) {
1901                 desc->seg_addr[i] = htole32(segs[i].ds_addr);
1902                 desc->seg_len[i]  = htole16(segs[i].ds_len);
1903         }
1904
1905         bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1906         bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE);
1907
1908         DPRINTFN(5, ("sending data frame txq=%u idx=%u len=%u nseg=%u\n",
1909             ac, txq->cur, le16toh(desc->len), nsegs));
1910
1911         txq->queued++;
1912         txq->cur = (txq->cur + 1) % IWI_TX_RING_COUNT;
1913         CSR_WRITE_4(sc, txq->csr_widx, txq->cur);
1914
1915         return 0;
1916 }
1917
1918 static int
1919 iwi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
1920         const struct ieee80211_bpf_params *params)
1921 {
1922         /* no support; just discard */
1923         m_freem(m);
1924         ieee80211_free_node(ni);
1925         return 0;
1926 }
1927
1928 static void
1929 iwi_start_locked(struct ifnet *ifp)
1930 {
1931         struct iwi_softc *sc = ifp->if_softc;
1932         struct mbuf *m;
1933         struct ieee80211_node *ni;
1934         int ac;
1935
1936         if ((ifp->if_flags & IFF_RUNNING) == 0)
1937                 return;
1938
1939         for (;;) {
1940                 m = ifq_dequeue(&ifp->if_snd);
1941                 if (m == NULL)
1942                         break;
1943                 ac = M_WME_GETAC(m);
1944                 if (sc->txq[ac].queued > IWI_TX_RING_COUNT - 8) {
1945                         /* there is no place left in this ring; tail drop */
1946                         /* XXX tail drop */
1947                         ifq_prepend(&ifp->if_snd, m);
1948                         ifq_set_oactive(&ifp->if_snd);
1949                         break;
1950                 }
1951
1952                 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
1953                 if (iwi_tx_start(ifp, m, ni, ac) != 0) {
1954                         ieee80211_free_node(ni);
1955                         IFNET_STAT_INC(ifp, oerrors, 1);
1956                         break;
1957                 }
1958
1959                 sc->sc_tx_timer = 5;
1960         }
1961 }
1962
1963 static void
1964 iwi_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
1965 {
1966         ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
1967         iwi_start_locked(ifp);
1968 }
1969
1970 static void
1971 iwi_watchdog(void *arg)
1972 {
1973         struct iwi_softc *sc = arg;
1974         struct ifnet *ifp = sc->sc_ifp;
1975         struct ieee80211com *ic = ifp->if_l2com;
1976
1977         wlan_serialize_enter();
1978         if (sc->sc_tx_timer > 0) {
1979                 if (--sc->sc_tx_timer == 0) {
1980                         if_printf(ifp, "device timeout\n");
1981                         IFNET_STAT_INC(ifp, oerrors, 1);
1982                         wlan_serialize_exit();
1983                         ieee80211_runtask(ic, &sc->sc_restarttask);
1984                         wlan_serialize_enter();
1985                 }
1986         }
1987         if (sc->sc_state_timer > 0) {
1988                 if (--sc->sc_state_timer == 0) {
1989                         if_printf(ifp, "firmware stuck in state %d, resetting\n",
1990                             sc->fw_state);
1991                         if (sc->fw_state == IWI_FW_SCANNING) {
1992                                 struct ieee80211com *ic = ifp->if_l2com;
1993                                 ieee80211_cancel_scan(TAILQ_FIRST(&ic->ic_vaps));
1994                         }
1995                         wlan_serialize_exit();
1996                         ieee80211_runtask(ic, &sc->sc_restarttask);
1997                         wlan_serialize_enter();
1998                         sc->sc_state_timer = 3;
1999                 }
2000         }
2001         if (sc->sc_busy_timer > 0) {
2002                 if (--sc->sc_busy_timer == 0) {
2003                         if_printf(ifp, "firmware command timeout, resetting\n");
2004                         wlan_serialize_exit();
2005                         ieee80211_runtask(ic, &sc->sc_restarttask);
2006                         wlan_serialize_enter();
2007                 }
2008         }
2009         callout_reset(&sc->sc_wdtimer_callout, hz, iwi_watchdog, sc);
2010         wlan_serialize_exit();
2011 }
2012
2013 static int
2014 iwi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *ucred)
2015 {
2016         struct iwi_softc *sc = ifp->if_softc;
2017         struct ieee80211com *ic = ifp->if_l2com;
2018         struct ifreq *ifr = (struct ifreq *) data;
2019         int error = 0, startall = 0;
2020
2021         switch (cmd) {
2022         case SIOCSIFFLAGS:
2023                 if (ifp->if_flags & IFF_UP) {
2024                         if (!(ifp->if_flags & IFF_RUNNING)) {
2025                                 iwi_init_locked(sc);
2026                                 startall = 1;
2027                         }
2028                 } else {
2029                         if (ifp->if_flags & IFF_RUNNING)
2030                                 iwi_stop_locked(sc);
2031                 }
2032                 if (startall)
2033                         ieee80211_start_all(ic);
2034                 break;
2035         case SIOCGIFMEDIA:
2036                 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
2037                 break;
2038         case SIOCGIFADDR:
2039                 error = ether_ioctl(ifp, cmd, data);
2040                 break;
2041         default:
2042                 error = EINVAL;
2043                 break;
2044         }
2045         return error;
2046 }
2047
2048 static void
2049 iwi_stop_master(struct iwi_softc *sc)
2050 {
2051         uint32_t tmp;
2052         int ntries;
2053
2054         /* disable interrupts */
2055         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, 0);
2056
2057         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_STOP_MASTER);
2058         for (ntries = 0; ntries < 5; ntries++) {
2059                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2060                         break;
2061                 DELAY(10);
2062         }
2063         if (ntries == 5)
2064                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2065
2066         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2067         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_PRINCETON_RESET);
2068
2069         sc->flags &= ~IWI_FLAG_FW_INITED;
2070 }
2071
2072 static int
2073 iwi_reset(struct iwi_softc *sc)
2074 {
2075         uint32_t tmp;
2076         int i, ntries;
2077
2078         iwi_stop_master(sc);
2079
2080         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2081         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2082
2083         CSR_WRITE_4(sc, IWI_CSR_READ_INT, IWI_READ_INT_INIT_HOST);
2084
2085         /* wait for clock stabilization */
2086         for (ntries = 0; ntries < 1000; ntries++) {
2087                 if (CSR_READ_4(sc, IWI_CSR_CTL) & IWI_CTL_CLOCK_READY)
2088                         break;
2089                 DELAY(200);
2090         }
2091         if (ntries == 1000) {
2092                 device_printf(sc->sc_dev,
2093                     "timeout waiting for clock stabilization\n");
2094                 return EIO;
2095         }
2096
2097         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2098         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_SOFT_RESET);
2099
2100         DELAY(10);
2101
2102         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2103         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2104
2105         /* clear NIC memory */
2106         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0);
2107         for (i = 0; i < 0xc000; i++)
2108                 CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2109
2110         return 0;
2111 }
2112
2113 static const struct iwi_firmware_ohdr *
2114 iwi_setup_ofw(struct iwi_softc *sc, struct iwi_fw *fw)
2115 {
2116         const struct firmware *fp = fw->fp;
2117         const struct iwi_firmware_ohdr *hdr;
2118
2119         if (fp->datasize < sizeof (struct iwi_firmware_ohdr)) {
2120                 device_printf(sc->sc_dev, "image '%s' too small\n", fp->name);
2121                 return NULL;
2122         }
2123         hdr = (const struct iwi_firmware_ohdr *)fp->data;
2124         if ((IWI_FW_GET_MAJOR(le32toh(hdr->version)) != IWI_FW_REQ_MAJOR) ||
2125             (IWI_FW_GET_MINOR(le32toh(hdr->version)) != IWI_FW_REQ_MINOR)) {
2126                 device_printf(sc->sc_dev, "version for '%s' %d.%d != %d.%d\n",
2127                     fp->name, IWI_FW_GET_MAJOR(le32toh(hdr->version)),
2128                     IWI_FW_GET_MINOR(le32toh(hdr->version)), IWI_FW_REQ_MAJOR,
2129                     IWI_FW_REQ_MINOR);
2130                 return NULL;
2131         }
2132         fw->data = ((const char *) fp->data) + sizeof(struct iwi_firmware_ohdr);
2133         fw->size = fp->datasize - sizeof(struct iwi_firmware_ohdr);
2134         fw->name = fp->name;
2135         return hdr;
2136 }
2137
2138 static const struct iwi_firmware_ohdr *
2139 iwi_setup_oucode(struct iwi_softc *sc, struct iwi_fw *fw)
2140 {
2141         const struct iwi_firmware_ohdr *hdr;
2142
2143         hdr = iwi_setup_ofw(sc, fw);
2144         if (hdr != NULL && le32toh(hdr->mode) != IWI_FW_MODE_UCODE) {
2145                 device_printf(sc->sc_dev, "%s is not a ucode image\n",
2146                     fw->name);
2147                 hdr = NULL;
2148         }
2149         return hdr;
2150 }
2151
2152 static void
2153 iwi_getfw(struct iwi_fw *fw, const char *fwname,
2154           struct iwi_fw *uc, const char *ucname)
2155 {
2156         wlan_assert_serialized();
2157         wlan_serialize_exit();
2158         if (fw->fp == NULL)
2159                 fw->fp = firmware_get(fwname);
2160
2161         /* NB: pre-3.0 ucode is packaged separately */
2162         if (uc->fp == NULL && fw->fp != NULL && fw->fp->version < 300)
2163                 uc->fp = firmware_get(ucname);
2164         wlan_serialize_enter();
2165 }
2166
2167 /*
2168  * Get the required firmware images if not already loaded.
2169  * Note that we hold firmware images so long as the device
2170  * is marked up in case we need to reload them on device init.
2171  * This is necessary because we re-init the device sometimes
2172  * from a context where we cannot read from the filesystem
2173  * (e.g. from the taskqueue thread when rfkill is re-enabled).
2174  * XXX return 0 on success, 1 on error.
2175  *
2176  * NB: the order of get'ing and put'ing images here is
2177  * intentional to support handling firmware images bundled
2178  * by operating mode and/or all together in one file with
2179  * the boot firmware as "master".
2180  */
2181 static int
2182 iwi_get_firmware(struct iwi_softc *sc, enum ieee80211_opmode opmode)
2183 {
2184         const struct iwi_firmware_hdr *hdr;
2185         const struct firmware *fp;
2186
2187         wlan_serialize_enter();
2188
2189         /* invalidate cached firmware on mode change */
2190         if (sc->fw_mode != opmode)
2191                 iwi_put_firmware(sc);
2192
2193         switch (opmode) {
2194         case IEEE80211_M_STA:
2195                 iwi_getfw(&sc->fw_fw, "iwi_bss", &sc->fw_uc, "iwi_ucode_bss");
2196                 break;
2197         case IEEE80211_M_IBSS:
2198                 iwi_getfw(&sc->fw_fw, "iwi_ibss", &sc->fw_uc, "iwi_ucode_ibss");
2199                 break;
2200         case IEEE80211_M_MONITOR:
2201                 iwi_getfw(&sc->fw_fw, "iwi_monitor",
2202                           &sc->fw_uc, "iwi_ucode_monitor");
2203                 break;
2204         default:
2205                 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode);
2206                 wlan_serialize_exit();
2207                 return EINVAL;
2208         }
2209         fp = sc->fw_fw.fp;
2210         if (fp == NULL) {
2211                 device_printf(sc->sc_dev, "could not load firmware\n");
2212                 goto bad;
2213         }
2214         if (fp->version < 300) {
2215                 /*
2216                  * Firmware prior to 3.0 was packaged as separate
2217                  * boot, firmware, and ucode images.  Verify the
2218                  * ucode image was read in, retrieve the boot image
2219                  * if needed, and check version stamps for consistency.
2220                  * The version stamps in the data are also checked
2221                  * above; this is a bit paranoid but is a cheap
2222                  * safeguard against mis-packaging.
2223                  */
2224                 if (sc->fw_uc.fp == NULL) {
2225                         device_printf(sc->sc_dev, "could not load ucode\n");
2226                         goto bad;
2227                 }
2228                 if (sc->fw_boot.fp == NULL) {
2229                         sc->fw_boot.fp = firmware_get("iwi_boot");
2230                         if (sc->fw_boot.fp == NULL) {
2231                                 device_printf(sc->sc_dev,
2232                                         "could not load boot firmware\n");
2233                                 goto bad;
2234                         }
2235                 }
2236                 if (sc->fw_boot.fp->version != sc->fw_fw.fp->version ||
2237                     sc->fw_boot.fp->version != sc->fw_uc.fp->version) {
2238                         device_printf(sc->sc_dev,
2239                             "firmware version mismatch: "
2240                             "'%s' is %d, '%s' is %d, '%s' is %d\n",
2241                             sc->fw_boot.fp->name, sc->fw_boot.fp->version,
2242                             sc->fw_uc.fp->name, sc->fw_uc.fp->version,
2243                             sc->fw_fw.fp->name, sc->fw_fw.fp->version
2244                         );
2245                         goto bad;
2246                 }
2247                 /*
2248                  * Check and setup each image.
2249                  */
2250                 if (iwi_setup_oucode(sc, &sc->fw_uc) == NULL ||
2251                     iwi_setup_ofw(sc, &sc->fw_boot) == NULL ||
2252                     iwi_setup_ofw(sc, &sc->fw_fw) == NULL)
2253                         goto bad;
2254         } else {
2255                 /*
2256                  * Check and setup combined image.
2257                  */
2258                 if (fp->datasize < sizeof(struct iwi_firmware_hdr)) {
2259                         device_printf(sc->sc_dev, "image '%s' too small\n",
2260                             fp->name);
2261                         goto bad;
2262                 }
2263                 hdr = (const struct iwi_firmware_hdr *)fp->data;
2264                 if (fp->datasize < sizeof(*hdr) + le32toh(hdr->bsize) + le32toh(hdr->usize)
2265                                 + le32toh(hdr->fsize)) {
2266                         device_printf(sc->sc_dev, "image '%s' too small (2)\n",
2267                             fp->name);
2268                         goto bad;
2269                 }
2270                 sc->fw_boot.data = ((const char *) fp->data) + sizeof(*hdr);
2271                 sc->fw_boot.size = le32toh(hdr->bsize);
2272                 sc->fw_boot.name = fp->name;
2273                 sc->fw_uc.data = sc->fw_boot.data + sc->fw_boot.size;
2274                 sc->fw_uc.size = le32toh(hdr->usize);
2275                 sc->fw_uc.name = fp->name;
2276                 sc->fw_fw.data = sc->fw_uc.data + sc->fw_uc.size;
2277                 sc->fw_fw.size = le32toh(hdr->fsize);
2278                 sc->fw_fw.name = fp->name;
2279         }
2280 #if 0
2281         device_printf(sc->sc_dev, "boot %d ucode %d fw %d bytes\n",
2282                 sc->fw_boot.size, sc->fw_uc.size, sc->fw_fw.size);
2283 #endif
2284
2285         sc->fw_mode = opmode;
2286         wlan_serialize_exit();
2287         return 0;
2288 bad:
2289         iwi_put_firmware(sc);
2290         wlan_serialize_exit();
2291         return 1;
2292 }
2293
2294 static void
2295 iwi_put_fw(struct iwi_fw *fw)
2296 {
2297         wlan_assert_serialized();
2298         wlan_serialize_exit();
2299         if (fw->fp != NULL) {
2300                 firmware_put(fw->fp, FIRMWARE_UNLOAD);
2301                 fw->fp = NULL;
2302         }
2303         wlan_serialize_enter();
2304         fw->data = NULL;
2305         fw->size = 0;
2306         fw->name = NULL;
2307 }
2308
2309 /*
2310  * Release any cached firmware images.
2311  */
2312 static void
2313 iwi_put_firmware(struct iwi_softc *sc)
2314 {
2315         iwi_put_fw(&sc->fw_uc);
2316         iwi_put_fw(&sc->fw_fw);
2317         iwi_put_fw(&sc->fw_boot);
2318 }
2319
2320 static int
2321 iwi_load_ucode(struct iwi_softc *sc, const struct iwi_fw *fw)
2322 {
2323         uint32_t tmp;
2324         const uint16_t *w;
2325         const char *uc = fw->data;
2326         size_t size = fw->size;
2327         int i, ntries, error;
2328
2329         error = 0;
2330         CSR_WRITE_4(sc, IWI_CSR_RST, CSR_READ_4(sc, IWI_CSR_RST) |
2331             IWI_RST_STOP_MASTER);
2332         for (ntries = 0; ntries < 5; ntries++) {
2333                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2334                         break;
2335                 DELAY(10);
2336         }
2337         if (ntries == 5) {
2338                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2339                 error = EIO;
2340                 goto fail;
2341         }
2342
2343         MEM_WRITE_4(sc, 0x3000e0, 0x80000000);
2344         DELAY(5000);
2345
2346         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2347         tmp &= ~IWI_RST_PRINCETON_RESET;
2348         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2349
2350         DELAY(5000);
2351         MEM_WRITE_4(sc, 0x3000e0, 0);
2352         DELAY(1000);
2353         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 1);
2354         DELAY(1000);
2355         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 0);
2356         DELAY(1000);
2357         MEM_WRITE_1(sc, 0x200000, 0x00);
2358         MEM_WRITE_1(sc, 0x200000, 0x40);
2359         DELAY(1000);
2360
2361         /* write microcode into adapter memory */
2362         for (w = (const uint16_t *)uc; size > 0; w++, size -= 2)
2363                 MEM_WRITE_2(sc, 0x200010, htole16(*w));
2364
2365         MEM_WRITE_1(sc, 0x200000, 0x00);
2366         MEM_WRITE_1(sc, 0x200000, 0x80);
2367
2368         /* wait until we get an answer */
2369         for (ntries = 0; ntries < 100; ntries++) {
2370                 if (MEM_READ_1(sc, 0x200000) & 1)
2371                         break;
2372                 DELAY(100);
2373         }
2374         if (ntries == 100) {
2375                 device_printf(sc->sc_dev,
2376                     "timeout waiting for ucode to initialize\n");
2377                 error = EIO;
2378                 goto fail;
2379         }
2380
2381         /* read the answer or the firmware will not initialize properly */
2382         for (i = 0; i < 7; i++)
2383                 MEM_READ_4(sc, 0x200004);
2384
2385         MEM_WRITE_1(sc, 0x200000, 0x00);
2386
2387 fail:
2388         return error;
2389 }
2390
2391 /* macro to handle unaligned little endian data in firmware image */
2392 #define GETLE32(p) ((p)[0] | (p)[1] << 8 | (p)[2] << 16 | (p)[3] << 24)
2393
2394 static int
2395 iwi_load_firmware(struct iwi_softc *sc, const struct iwi_fw *fw)
2396 {
2397         u_char *p, *end;
2398         uint32_t sentinel, ctl, src, dst, sum, len, mlen, tmp;
2399         int ntries, error;
2400
2401         /* copy firmware image to DMA memory */
2402         memcpy(sc->fw_virtaddr, fw->data, fw->size);
2403
2404         /* make sure the adapter will get up-to-date values */
2405         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_PREWRITE);
2406
2407         /* tell the adapter where the command blocks are stored */
2408         MEM_WRITE_4(sc, 0x3000a0, 0x27000);
2409
2410         /*
2411          * Store command blocks into adapter's internal memory using register
2412          * indirections. The adapter will read the firmware image through DMA
2413          * using information stored in command blocks.
2414          */
2415         src = sc->fw_physaddr;
2416         p = sc->fw_virtaddr;
2417         end = p + fw->size;
2418         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0x27000);
2419
2420         while (p < end) {
2421                 dst = GETLE32(p); p += 4; src += 4;
2422                 len = GETLE32(p); p += 4; src += 4;
2423                 p += len;
2424
2425                 while (len > 0) {
2426                         mlen = min(len, IWI_CB_MAXDATALEN);
2427
2428                         ctl = IWI_CB_DEFAULT_CTL | mlen;
2429                         sum = ctl ^ src ^ dst;
2430
2431                         /* write a command block */
2432                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, ctl);
2433                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, src);
2434                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, dst);
2435                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, sum);
2436
2437                         src += mlen;
2438                         dst += mlen;
2439                         len -= mlen;
2440                 }
2441         }
2442
2443         /* write a fictive final command block (sentinel) */
2444         sentinel = CSR_READ_4(sc, IWI_CSR_AUTOINC_ADDR);
2445         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2446
2447         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2448         tmp &= ~(IWI_RST_MASTER_DISABLED | IWI_RST_STOP_MASTER);
2449         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2450
2451         /* tell the adapter to start processing command blocks */
2452         MEM_WRITE_4(sc, 0x3000a4, 0x540100);
2453
2454         /* wait until the adapter reaches the sentinel */
2455         for (ntries = 0; ntries < 400; ntries++) {
2456                 if (MEM_READ_4(sc, 0x3000d0) >= sentinel)
2457                         break;
2458                 DELAY(100);
2459         }
2460         /* sync dma, just in case */
2461         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_POSTWRITE);
2462         if (ntries == 400) {
2463                 device_printf(sc->sc_dev,
2464                     "timeout processing command blocks for %s firmware\n",
2465                     fw->name);
2466                 return EIO;
2467         }
2468
2469         /* we're done with command blocks processing */
2470         MEM_WRITE_4(sc, 0x3000a4, 0x540c00);
2471
2472         /* allow interrupts so we know when the firmware is ready */
2473         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, IWI_INTR_MASK);
2474
2475         /* tell the adapter to initialize the firmware */
2476         CSR_WRITE_4(sc, IWI_CSR_RST, 0);
2477
2478         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2479         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_ALLOW_STANDBY);
2480
2481         /* wait at most one second for firmware initialization to complete */
2482         error = zsleep(sc, &wlan_global_serializer, 0, "iwiinit", hz);
2483         if (error != 0) {
2484                 device_printf(sc->sc_dev, "timeout waiting for firmware "
2485                             "initialization to complete\n");
2486         }
2487
2488         return error;
2489 }
2490
2491 static int
2492 iwi_setpowermode(struct iwi_softc *sc, struct ieee80211vap *vap)
2493 {
2494         uint32_t data;
2495
2496         if (vap->iv_flags & IEEE80211_F_PMGTON) {
2497                 /* XXX set more fine-grained operation */
2498                 data = htole32(IWI_POWER_MODE_MAX);
2499         } else
2500                 data = htole32(IWI_POWER_MODE_CAM);
2501
2502         DPRINTF(("Setting power mode to %u\n", le32toh(data)));
2503         return iwi_cmd(sc, IWI_CMD_SET_POWER_MODE, &data, sizeof data);
2504 }
2505
2506 static int
2507 iwi_setwepkeys(struct iwi_softc *sc, struct ieee80211vap *vap)
2508 {
2509         struct iwi_wep_key wepkey;
2510         struct ieee80211_key *wk;
2511         int error, i;
2512
2513         for (i = 0; i < IEEE80211_WEP_NKID; i++) {
2514                 wk = &vap->iv_nw_keys[i];
2515
2516                 wepkey.cmd = IWI_WEP_KEY_CMD_SETKEY;
2517                 wepkey.idx = i;
2518                 wepkey.len = wk->wk_keylen;
2519                 memset(wepkey.key, 0, sizeof wepkey.key);
2520                 memcpy(wepkey.key, wk->wk_key, wk->wk_keylen);
2521                 DPRINTF(("Setting wep key index %u len %u\n", wepkey.idx,
2522                     wepkey.len));
2523                 error = iwi_cmd(sc, IWI_CMD_SET_WEP_KEY, &wepkey,
2524                     sizeof wepkey);
2525                 if (error != 0)
2526                         return error;
2527         }
2528         return 0;
2529 }
2530
2531 static int
2532 iwi_config(struct iwi_softc *sc)
2533 {
2534         struct ifnet *ifp = sc->sc_ifp;
2535         struct ieee80211com *ic = ifp->if_l2com;
2536         struct iwi_configuration config;
2537         struct iwi_rateset rs;
2538         struct iwi_txpower power;
2539         uint32_t data;
2540         int error, i;
2541         const uint8_t *eaddr = IF_LLADDR(ifp);
2542         char ethstr[ETHER_ADDRSTRLEN + 1];
2543
2544         DPRINTF(("Setting MAC address to %s\n", kether_ntoa(eaddr, ethstr)));
2545         error = iwi_cmd(sc, IWI_CMD_SET_MAC_ADDRESS, IF_LLADDR(ifp),
2546             IEEE80211_ADDR_LEN);
2547         if (error != 0)
2548                 return error;
2549
2550         memset(&config, 0, sizeof config);
2551         config.bluetooth_coexistence = sc->bluetooth;
2552         config.silence_threshold = 0x1e;
2553         config.antenna = sc->antenna;
2554         config.multicast_enabled = 1;
2555         config.answer_pbreq = (ic->ic_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2556         config.disable_unicast_decryption = 1;
2557         config.disable_multicast_decryption = 1;
2558         DPRINTF(("Configuring adapter\n"));
2559         error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2560         if (error != 0)
2561                 return error;
2562         if (ic->ic_opmode == IEEE80211_M_IBSS) {
2563                 power.mode = IWI_MODE_11B;
2564                 power.nchan = 11;
2565                 for (i = 0; i < 11; i++) {
2566                         power.chan[i].chan = i + 1;
2567                         power.chan[i].power = IWI_TXPOWER_MAX;
2568                 }
2569                 DPRINTF(("Setting .11b channels tx power\n"));
2570                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2571                 if (error != 0)
2572                         return error;
2573
2574                 power.mode = IWI_MODE_11G;
2575                 DPRINTF(("Setting .11g channels tx power\n"));
2576                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2577                 if (error != 0)
2578                         return error;
2579         }
2580
2581         memset(&rs, 0, sizeof rs);
2582         rs.mode = IWI_MODE_11G;
2583         rs.type = IWI_RATESET_TYPE_SUPPORTED;
2584         rs.nrates = ic->ic_sup_rates[IEEE80211_MODE_11G].rs_nrates;
2585         memcpy(rs.rates, ic->ic_sup_rates[IEEE80211_MODE_11G].rs_rates,
2586             rs.nrates);
2587         DPRINTF(("Setting .11bg supported rates (%u)\n", rs.nrates));
2588         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2589         if (error != 0)
2590                 return error;
2591
2592         memset(&rs, 0, sizeof rs);
2593         rs.mode = IWI_MODE_11A;
2594         rs.type = IWI_RATESET_TYPE_SUPPORTED;
2595         rs.nrates = ic->ic_sup_rates[IEEE80211_MODE_11A].rs_nrates;
2596         memcpy(rs.rates, ic->ic_sup_rates[IEEE80211_MODE_11A].rs_rates,
2597             rs.nrates);
2598         DPRINTF(("Setting .11a supported rates (%u)\n", rs.nrates));
2599         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2600         if (error != 0)
2601                 return error;
2602
2603         data = htole32(karc4random());
2604         DPRINTF(("Setting initialization vector to %u\n", le32toh(data)));
2605         error = iwi_cmd(sc, IWI_CMD_SET_IV, &data, sizeof data);
2606         if (error != 0)
2607                 return error;
2608
2609         /* enable adapter */
2610         DPRINTF(("Enabling adapter\n"));
2611         return iwi_cmd(sc, IWI_CMD_ENABLE, NULL, 0);
2612 }
2613
2614 static __inline void
2615 set_scan_type(struct iwi_scan_ext *scan, int ix, int scan_type)
2616 {
2617         uint8_t *st = &scan->scan_type[ix / 2];
2618         if (ix % 2)
2619                 *st = (*st & 0xf0) | ((scan_type & 0xf) << 0);
2620         else
2621                 *st = (*st & 0x0f) | ((scan_type & 0xf) << 4);
2622 }
2623
2624 static int
2625 scan_type(const struct ieee80211_scan_state *ss,
2626         const struct ieee80211_channel *chan)
2627 {
2628         /* We can only set one essid for a directed scan */
2629         if (ss->ss_nssid != 0)
2630                 return IWI_SCAN_TYPE_BDIRECTED;
2631         if ((ss->ss_flags & IEEE80211_SCAN_ACTIVE) &&
2632             (chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0)
2633                 return IWI_SCAN_TYPE_BROADCAST;
2634         return IWI_SCAN_TYPE_PASSIVE;
2635 }
2636
2637 static __inline int
2638 scan_band(const struct ieee80211_channel *c)
2639 {
2640         return IEEE80211_IS_CHAN_5GHZ(c) ?  IWI_CHAN_5GHZ : IWI_CHAN_2GHZ;
2641 }
2642
2643 /*
2644  * Start a scan on the current channel or all channels.
2645  */
2646 static int
2647 iwi_scanchan(struct iwi_softc *sc, unsigned long maxdwell, int allchan)
2648 {
2649         struct ieee80211com *ic;
2650         struct ieee80211_channel *chan;
2651         struct ieee80211_scan_state *ss;
2652         struct iwi_scan_ext scan;
2653         int error = 0;
2654
2655         if (sc->fw_state == IWI_FW_SCANNING) {
2656                 /*
2657                  * This should not happen as we only trigger scan_next after
2658                  * completion
2659                  */
2660                 DPRINTF(("%s: called too early - still scanning\n", __func__));
2661                 return (EBUSY);
2662         }
2663         IWI_STATE_BEGIN(sc, IWI_FW_SCANNING);
2664
2665         ic = sc->sc_ifp->if_l2com;
2666         ss = ic->ic_scan;
2667
2668         memset(&scan, 0, sizeof scan);
2669         scan.full_scan_index = htole32(++sc->sc_scangen);
2670         scan.dwell_time[IWI_SCAN_TYPE_PASSIVE] = htole16(maxdwell);
2671         if (ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) {
2672                 /*
2673                  * Use very short dwell times for when we send probe request
2674                  * frames.  Without this bg scans hang.  Ideally this should
2675                  * be handled with early-termination as done by net80211 but
2676                  * that's not feasible (aborting a scan is problematic).
2677                  */
2678                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(30);
2679                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(30);
2680         } else {
2681                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(maxdwell);
2682                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(maxdwell);
2683         }
2684
2685         /* We can only set one essid for a directed scan */
2686         if (ss->ss_nssid != 0) {
2687                 error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ss->ss_ssid[0].ssid,
2688                     ss->ss_ssid[0].len);
2689                 if (error)
2690                         return (error);
2691         }
2692
2693         if (allchan) {
2694                 int i, next, band, b, bstart;
2695                 /*
2696                  * Convert scan list to run-length encoded channel list
2697                  * the firmware requires (preserving the order setup by
2698                  * net80211).  The first entry in each run specifies the
2699                  * band and the count of items in the run.
2700                  */
2701                 next = 0;               /* next open slot */
2702                 bstart = 0;             /* NB: not needed, silence compiler */
2703                 band = -1;              /* NB: impossible value */
2704                 KASSERT(ss->ss_last > 0, ("no channels"));
2705                 for (i = 0; i < ss->ss_last; i++) {
2706                         chan = ss->ss_chans[i];
2707                         b = scan_band(chan);
2708                         if (b != band) {
2709                                 if (band != -1)
2710                                         scan.channels[bstart] =
2711                                             (next - bstart) | band;
2712                                 /* NB: this allocates a slot for the run-len */
2713                                 band = b, bstart = next++;
2714                         }
2715                         if (next >= IWI_SCAN_CHANNELS) {
2716                                 DPRINTF(("truncating scan list\n"));
2717                                 break;
2718                         }
2719                         scan.channels[next] = ieee80211_chan2ieee(ic, chan);
2720                         set_scan_type(&scan, next, scan_type(ss, chan));
2721                         next++;
2722                 }
2723                 scan.channels[bstart] = (next - bstart) | band;
2724         } else {
2725                 /* Scan the current channel only */
2726                 chan = ic->ic_curchan;
2727                 scan.channels[0] = 1 | scan_band(chan);
2728                 scan.channels[1] = ieee80211_chan2ieee(ic, chan);
2729                 set_scan_type(&scan, 1, scan_type(ss, chan));
2730         }
2731 #ifdef IWI_DEBUG
2732         if (iwi_debug > 0) {
2733                 static const char *scantype[8] =
2734                    { "PSTOP", "PASV", "DIR", "BCAST", "BDIR", "5", "6", "7" };
2735                 int i;
2736                 kprintf("Scan request: index %u dwell %d/%d/%d\n"
2737                     , le32toh(scan.full_scan_index)
2738                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_PASSIVE])
2739                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BROADCAST])
2740                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED])
2741                 );
2742                 i = 0;
2743                 do {
2744                         int run = scan.channels[i];
2745                         if (run == 0)
2746                                 break;
2747                         kprintf("Scan %d %s channels:", run & 0x3f,
2748                             run & IWI_CHAN_2GHZ ? "2.4GHz" : "5GHz");
2749                         for (run &= 0x3f, i++; run > 0; run--, i++) {
2750                                 uint8_t type = scan.scan_type[i/2];
2751                                 kprintf(" %u/%s", scan.channels[i],
2752                                     scantype[(i & 1 ? type : type>>4) & 7]);
2753                         }
2754                         kprintf("\n");
2755                 } while (i < IWI_SCAN_CHANNELS);
2756         }
2757 #endif
2758
2759         return (iwi_cmd(sc, IWI_CMD_SCAN_EXT, &scan, sizeof scan));
2760 }
2761
2762 static int
2763 iwi_set_sensitivity(struct iwi_softc *sc, int8_t rssi_dbm)
2764 {
2765         struct iwi_sensitivity sens;
2766
2767         DPRINTF(("Setting sensitivity to %d\n", rssi_dbm));
2768
2769         memset(&sens, 0, sizeof sens);
2770         sens.rssi = htole16(rssi_dbm);
2771         return iwi_cmd(sc, IWI_CMD_SET_SENSITIVITY, &sens, sizeof sens);
2772 }
2773
2774 static int
2775 iwi_auth_and_assoc(struct iwi_softc *sc, struct ieee80211vap *vap)
2776 {
2777         struct ieee80211com *ic = vap->iv_ic;
2778         struct ifnet *ifp = vap->iv_ifp;
2779         struct ieee80211_node *ni = vap->iv_bss;
2780         struct iwi_configuration config;
2781         struct iwi_associate *assoc = &sc->assoc;
2782         struct iwi_rateset rs;
2783         uint16_t capinfo;
2784         uint32_t data;
2785         int error, mode;
2786         char ethstr[2][ETHER_ADDRSTRLEN + 1];
2787
2788         if (sc->flags & IWI_FLAG_ASSOCIATED) {
2789                 DPRINTF(("Already associated\n"));
2790                 return (-1);
2791         }
2792
2793         IWI_STATE_BEGIN(sc, IWI_FW_ASSOCIATING);
2794         error = 0;
2795         mode = 0;
2796
2797         if (IEEE80211_IS_CHAN_A(ic->ic_curchan))
2798                 mode = IWI_MODE_11A;
2799         else if (IEEE80211_IS_CHAN_G(ic->ic_curchan))
2800                 mode = IWI_MODE_11G;
2801         if (IEEE80211_IS_CHAN_B(ic->ic_curchan))
2802                 mode = IWI_MODE_11B;
2803
2804         if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) {
2805                 memset(&config, 0, sizeof config);
2806                 config.bluetooth_coexistence = sc->bluetooth;
2807                 config.antenna = sc->antenna;
2808                 config.multicast_enabled = 1;
2809                 if (mode == IWI_MODE_11G)
2810                         config.use_protection = 1;
2811                 config.answer_pbreq =
2812                     (vap->iv_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2813                 config.disable_unicast_decryption = 1;
2814                 config.disable_multicast_decryption = 1;
2815                 DPRINTF(("Configuring adapter\n"));
2816                 error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2817                 if (error != 0)
2818                         goto done;
2819         }
2820
2821 #ifdef IWI_DEBUG
2822         if (iwi_debug > 0) {
2823                 kprintf("Setting ESSID to ");
2824                 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
2825                 kprintf("\n");
2826         }
2827 #endif
2828         error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ni->ni_essid, ni->ni_esslen);
2829         if (error != 0)
2830                 goto done;
2831
2832         error = iwi_setpowermode(sc, vap);
2833         if (error != 0)
2834                 goto done;
2835
2836         data = htole32(vap->iv_rtsthreshold);
2837         DPRINTF(("Setting RTS threshold to %u\n", le32toh(data)));
2838         error = iwi_cmd(sc, IWI_CMD_SET_RTS_THRESHOLD, &data, sizeof data);
2839         if (error != 0)
2840                 goto done;
2841
2842         data = htole32(vap->iv_fragthreshold);
2843         DPRINTF(("Setting fragmentation threshold to %u\n", le32toh(data)));
2844         error = iwi_cmd(sc, IWI_CMD_SET_FRAG_THRESHOLD, &data, sizeof data);
2845         if (error != 0)
2846                 goto done;
2847
2848         /* the rate set has already been "negotiated" */
2849         memset(&rs, 0, sizeof rs);
2850         rs.mode = mode;
2851         rs.type = IWI_RATESET_TYPE_NEGOTIATED;
2852         rs.nrates = ni->ni_rates.rs_nrates;
2853         if (rs.nrates > IWI_RATESET_SIZE) {
2854                 DPRINTF(("Truncating negotiated rate set from %u\n",
2855                     rs.nrates));
2856                 rs.nrates = IWI_RATESET_SIZE;
2857         }
2858         memcpy(rs.rates, ni->ni_rates.rs_rates, rs.nrates);
2859         DPRINTF(("Setting negotiated rates (%u)\n", rs.nrates));
2860         error = iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof rs);
2861         if (error != 0)
2862                 goto done;
2863
2864         memset(assoc, 0, sizeof *assoc);
2865
2866         if ((vap->iv_flags & IEEE80211_F_WME) && ni->ni_ies.wme_ie != NULL) {
2867                 /* NB: don't treat WME setup as failure */
2868                 if (iwi_wme_setparams(sc, ic) == 0 && iwi_wme_setie(sc) == 0)
2869                         assoc->policy |= htole16(IWI_POLICY_WME);
2870                 /* XXX complain on failure? */
2871         }
2872
2873         if (vap->iv_appie_wpa != NULL) {
2874                 struct ieee80211_appie *ie = vap->iv_appie_wpa;
2875
2876                 DPRINTF(("Setting optional IE (len=%u)\n", ie->ie_len));
2877                 error = iwi_cmd(sc, IWI_CMD_SET_OPTIE, ie->ie_data, ie->ie_len);
2878                 if (error != 0)
2879                         goto done;
2880         }
2881
2882         error = iwi_set_sensitivity(sc, ic->ic_node_getrssi(ni));
2883         if (error != 0)
2884                 goto done;
2885
2886         assoc->mode = mode;
2887         assoc->chan = ic->ic_curchan->ic_ieee;
2888         /*
2889          * NB: do not arrange for shared key auth w/o privacy
2890          *     (i.e. a wep key); it causes a firmware error.
2891          */
2892         if ((vap->iv_flags & IEEE80211_F_PRIVACY) &&
2893             ni->ni_authmode == IEEE80211_AUTH_SHARED) {
2894                 assoc->auth = IWI_AUTH_SHARED;
2895                 /*
2896                  * It's possible to have privacy marked but no default
2897                  * key setup.  This typically is due to a user app bug
2898                  * but if we blindly grab the key the firmware will
2899                  * barf so avoid it for now.
2900                  */
2901                 if (vap->iv_def_txkey != IEEE80211_KEYIX_NONE)
2902                         assoc->auth |= vap->iv_def_txkey << 4;
2903
2904                 error = iwi_setwepkeys(sc, vap);
2905                 if (error != 0)
2906                         goto done;
2907         }
2908         if (vap->iv_flags & IEEE80211_F_WPA)
2909                 assoc->policy |= htole16(IWI_POLICY_WPA);
2910         if (vap->iv_opmode == IEEE80211_M_IBSS && ni->ni_tstamp.tsf == 0)
2911                 assoc->type = IWI_HC_IBSS_START;
2912         else
2913                 assoc->type = IWI_HC_ASSOC;
2914         memcpy(assoc->tstamp, ni->ni_tstamp.data, 8);
2915
2916         if (vap->iv_opmode == IEEE80211_M_IBSS)
2917                 capinfo = IEEE80211_CAPINFO_IBSS;
2918         else
2919                 capinfo = IEEE80211_CAPINFO_ESS;
2920         if (vap->iv_flags & IEEE80211_F_PRIVACY)
2921                 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2922         if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2923             IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
2924                 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2925         if (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)
2926                 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2927         assoc->capinfo = htole16(capinfo);
2928
2929         assoc->lintval = htole16(ic->ic_lintval);
2930         assoc->intval = htole16(ni->ni_intval);
2931         IEEE80211_ADDR_COPY(assoc->bssid, ni->ni_bssid);
2932         if (vap->iv_opmode == IEEE80211_M_IBSS)
2933                 IEEE80211_ADDR_COPY(assoc->dst, ifp->if_broadcastaddr);
2934         else
2935                 IEEE80211_ADDR_COPY(assoc->dst, ni->ni_bssid);
2936
2937         DPRINTF(("%s bssid %s dst %s channel %u policy 0x%x "
2938             "auth %u capinfo 0x%x lintval %u bintval %u\n",
2939             assoc->type == IWI_HC_IBSS_START ? "Start" : "Join",
2940             kether_ntoa(assoc->bssid, ethstr[0]), kether_ntoa(assoc->dst, ethstr[1]),
2941             assoc->chan, le16toh(assoc->policy), assoc->auth,
2942             le16toh(assoc->capinfo), le16toh(assoc->lintval),
2943             le16toh(assoc->intval)));
2944         error = iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
2945 done:
2946         if (error)
2947                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
2948
2949         return (error);
2950 }
2951
2952 static void
2953 iwi_disassoc_task(void *arg, int pending)
2954 {
2955         struct iwi_softc *sc = arg;
2956
2957         wlan_serialize_enter();
2958         iwi_disassociate(sc, 0);
2959         wlan_serialize_exit();
2960 }
2961
2962 static int
2963 iwi_disassociate(struct iwi_softc *sc, int quiet)
2964 {
2965         struct iwi_associate *assoc = &sc->assoc;
2966         char ethstr[ETHER_ADDRSTRLEN + 1];
2967
2968         if ((sc->flags & IWI_FLAG_ASSOCIATED) == 0) {
2969                 DPRINTF(("Not associated\n"));
2970                 return (-1);
2971         }
2972
2973         IWI_STATE_BEGIN(sc, IWI_FW_DISASSOCIATING);
2974
2975         if (quiet)
2976                 assoc->type = IWI_HC_DISASSOC_QUIET;
2977         else
2978                 assoc->type = IWI_HC_DISASSOC;
2979
2980         DPRINTF(("Trying to disassociate from %s channel %u\n",
2981             kether_ntoa(assoc->bssid, ethstr), assoc->chan));
2982         return iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
2983 }
2984
2985 /*
2986  * release dma resources for the firmware
2987  */
2988 static void
2989 iwi_release_fw_dma(struct iwi_softc *sc)
2990 {
2991         if (sc->fw_flags & IWI_FW_HAVE_PHY)
2992                 bus_dmamap_unload(sc->fw_dmat, sc->fw_map);
2993         if (sc->fw_flags & IWI_FW_HAVE_MAP)
2994                 bus_dmamem_free(sc->fw_dmat, sc->fw_virtaddr, sc->fw_map);
2995         if (sc->fw_flags & IWI_FW_HAVE_DMAT)
2996                 bus_dma_tag_destroy(sc->fw_dmat);
2997
2998         sc->fw_flags = 0;
2999         sc->fw_dma_size = 0;
3000         sc->fw_dmat = NULL;
3001         sc->fw_map = NULL;
3002         sc->fw_physaddr = 0;
3003         sc->fw_virtaddr = NULL;
3004 }
3005
3006 /*
3007  * allocate the dma descriptor for the firmware.
3008  * Return 0 on success, 1 on error.
3009  * Must be called unlocked, protected by IWI_FLAG_FW_LOADING.
3010  */
3011 static int
3012 iwi_init_fw_dma(struct iwi_softc *sc, int size)
3013 {
3014         if (sc->fw_dma_size >= size)
3015                 return 0;
3016         if (bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT,
3017             BUS_SPACE_MAXADDR, NULL, NULL, size, 1, size,
3018             0, &sc->fw_dmat) != 0) {
3019                 device_printf(sc->sc_dev,
3020                     "could not create firmware DMA tag\n");
3021                 goto error;
3022         }
3023         sc->fw_flags |= IWI_FW_HAVE_DMAT;
3024         if (bus_dmamem_alloc(sc->fw_dmat, &sc->fw_virtaddr, 0,
3025             &sc->fw_map) != 0) {
3026                 device_printf(sc->sc_dev,
3027                     "could not allocate firmware DMA memory\n");
3028                 goto error;
3029         }
3030         sc->fw_flags |= IWI_FW_HAVE_MAP;
3031         if (bus_dmamap_load(sc->fw_dmat, sc->fw_map, sc->fw_virtaddr,
3032             size, iwi_dma_map_addr, &sc->fw_physaddr, 0) != 0) {
3033                 device_printf(sc->sc_dev, "could not load firmware DMA map\n");
3034                 goto error;
3035         }
3036         sc->fw_flags |= IWI_FW_HAVE_PHY;
3037         sc->fw_dma_size = size;
3038         return 0;
3039
3040 error:
3041         iwi_release_fw_dma(sc);
3042         return 1;
3043 }
3044
3045 static void
3046 iwi_init_locked(struct iwi_softc *sc)
3047 {
3048         struct ifnet *ifp = sc->sc_ifp;
3049         struct iwi_rx_data *data;
3050         int i;
3051
3052         if (sc->fw_state == IWI_FW_LOADING) {
3053                 device_printf(sc->sc_dev, "%s: already loading\n", __func__);
3054                 return;         /* XXX: condvar? */
3055         }
3056
3057         iwi_stop_locked(sc);
3058
3059         IWI_STATE_BEGIN(sc, IWI_FW_LOADING);
3060
3061         if (iwi_reset(sc) != 0) {
3062                 device_printf(sc->sc_dev, "could not reset adapter\n");
3063                 goto fail;
3064         }
3065         if (iwi_load_firmware(sc, &sc->fw_boot) != 0) {
3066                 device_printf(sc->sc_dev,
3067                     "could not load boot firmware %s\n", sc->fw_boot.name);
3068                 goto fail;
3069         }
3070         if (iwi_load_ucode(sc, &sc->fw_uc) != 0) {
3071                 device_printf(sc->sc_dev,
3072                     "could not load microcode %s\n", sc->fw_uc.name);
3073                 goto fail;
3074         }
3075
3076         iwi_stop_master(sc);
3077
3078         CSR_WRITE_4(sc, IWI_CSR_CMD_BASE, sc->cmdq.physaddr);
3079         CSR_WRITE_4(sc, IWI_CSR_CMD_SIZE, sc->cmdq.count);
3080         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
3081
3082         CSR_WRITE_4(sc, IWI_CSR_TX1_BASE, sc->txq[0].physaddr);
3083         CSR_WRITE_4(sc, IWI_CSR_TX1_SIZE, sc->txq[0].count);
3084         CSR_WRITE_4(sc, IWI_CSR_TX1_WIDX, sc->txq[0].cur);
3085
3086         CSR_WRITE_4(sc, IWI_CSR_TX2_BASE, sc->txq[1].physaddr);
3087         CSR_WRITE_4(sc, IWI_CSR_TX2_SIZE, sc->txq[1].count);
3088         CSR_WRITE_4(sc, IWI_CSR_TX2_WIDX, sc->txq[1].cur);
3089
3090         CSR_WRITE_4(sc, IWI_CSR_TX3_BASE, sc->txq[2].physaddr);
3091         CSR_WRITE_4(sc, IWI_CSR_TX3_SIZE, sc->txq[2].count);
3092         CSR_WRITE_4(sc, IWI_CSR_TX3_WIDX, sc->txq[2].cur);
3093
3094         CSR_WRITE_4(sc, IWI_CSR_TX4_BASE, sc->txq[3].physaddr);
3095         CSR_WRITE_4(sc, IWI_CSR_TX4_SIZE, sc->txq[3].count);
3096         CSR_WRITE_4(sc, IWI_CSR_TX4_WIDX, sc->txq[3].cur);
3097
3098         for (i = 0; i < sc->rxq.count; i++) {
3099                 data = &sc->rxq.data[i];
3100                 CSR_WRITE_4(sc, data->reg, data->physaddr);
3101         }
3102
3103         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, sc->rxq.count - 1);
3104
3105         if (iwi_load_firmware(sc, &sc->fw_fw) != 0) {
3106                 device_printf(sc->sc_dev,
3107                     "could not load main firmware %s\n", sc->fw_fw.name);
3108                 goto fail;
3109         }
3110         sc->flags |= IWI_FLAG_FW_INITED;
3111
3112         IWI_STATE_END(sc, IWI_FW_LOADING);
3113
3114         if (iwi_config(sc) != 0) {
3115                 device_printf(sc->sc_dev, "unable to enable adapter\n");
3116                 goto fail2;
3117         }
3118
3119         callout_reset(&sc->sc_wdtimer_callout, hz, iwi_watchdog, sc);
3120         ifq_clr_oactive(&ifp->if_snd);
3121         ifp->if_flags |= IFF_RUNNING;
3122         return;
3123 fail:
3124         IWI_STATE_END(sc, IWI_FW_LOADING);
3125 fail2:
3126         iwi_stop_locked(sc);
3127 }
3128
3129 static void
3130 iwi_init(void *priv)
3131 {
3132         struct iwi_softc *sc = priv;
3133         struct ifnet *ifp = sc->sc_ifp;
3134         struct ieee80211com *ic = ifp->if_l2com;
3135
3136         iwi_init_locked(sc);
3137
3138         if (ifp->if_flags & IFF_RUNNING)
3139                 ieee80211_start_all(ic);
3140 }
3141
3142 static void
3143 iwi_stop_locked(void *priv)
3144 {
3145         struct iwi_softc *sc = priv;
3146         struct ifnet *ifp = sc->sc_ifp;
3147
3148         ifp->if_flags &= ~IFF_RUNNING;
3149         ifq_clr_oactive(&ifp->if_snd);
3150
3151         if (sc->sc_softled) {
3152                 callout_stop(&sc->sc_ledtimer_callout);
3153                 sc->sc_blinking = 0;
3154         }
3155         callout_stop(&sc->sc_wdtimer_callout);
3156         callout_stop(&sc->sc_rftimer_callout);
3157
3158         iwi_stop_master(sc);
3159
3160         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_SOFT_RESET);
3161
3162         /* reset rings */
3163         iwi_reset_cmd_ring(sc, &sc->cmdq);
3164         iwi_reset_tx_ring(sc, &sc->txq[0]);
3165         iwi_reset_tx_ring(sc, &sc->txq[1]);
3166         iwi_reset_tx_ring(sc, &sc->txq[2]);
3167         iwi_reset_tx_ring(sc, &sc->txq[3]);
3168         iwi_reset_rx_ring(sc, &sc->rxq);
3169
3170         sc->sc_tx_timer = 0;
3171         sc->sc_state_timer = 0;
3172         sc->sc_busy_timer = 0;
3173         sc->flags &= ~(IWI_FLAG_BUSY | IWI_FLAG_ASSOCIATED);
3174         sc->fw_state = IWI_FW_IDLE;
3175         wakeup(sc);
3176 }
3177
3178 static void
3179 iwi_stop(struct iwi_softc *sc)
3180 {
3181         iwi_stop_locked(sc);
3182 }
3183
3184 static void
3185 iwi_restart_task(void *arg, int npending)
3186 {
3187         struct iwi_softc *sc = arg;
3188
3189         wlan_serialize_enter();
3190         iwi_init(sc);
3191         wlan_serialize_exit();
3192 }
3193
3194 /*
3195  * Return whether or not the radio is enabled in hardware
3196  * (i.e. the rfkill switch is "off").
3197  */
3198 static int
3199 iwi_getrfkill(struct iwi_softc *sc)
3200 {
3201         return (CSR_READ_4(sc, IWI_CSR_IO) & IWI_IO_RADIO_ENABLED) == 0;
3202 }
3203
3204 static void
3205 iwi_radio_on_task(void *arg, int pending)
3206 {
3207         struct iwi_softc *sc = arg;
3208         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
3209
3210         wlan_serialize_enter();
3211         device_printf(sc->sc_dev, "radio turned on\n");
3212
3213         iwi_init(sc);
3214         ieee80211_notify_radio(ic, 1);
3215         wlan_serialize_exit();
3216 }
3217
3218 static void
3219 iwi_rfkill_poll(void *arg)
3220 {
3221         struct iwi_softc *sc = arg;
3222
3223         /*
3224          * Check for a change in rfkill state.  We get an
3225          * interrupt when a radio is disabled but not when
3226          * it is enabled so we must poll for the latter.
3227          */
3228         if (!iwi_getrfkill(sc)) {
3229                 struct ifnet *ifp = sc->sc_ifp;
3230                 struct ieee80211com *ic = ifp->if_l2com;
3231
3232                 ieee80211_runtask(ic, &sc->sc_radiontask);
3233                 return;
3234         }
3235         callout_reset(&sc->sc_rftimer_callout, 2*hz, iwi_rfkill_poll, sc);
3236 }
3237
3238 static void
3239 iwi_radio_off_task(void *arg, int pending)
3240 {
3241         struct iwi_softc *sc = arg;
3242         struct ieee80211com *ic = sc->sc_ifp->if_l2com;
3243
3244         wlan_serialize_enter();
3245         device_printf(sc->sc_dev, "radio turned off\n");
3246
3247         ieee80211_notify_radio(ic, 0);
3248
3249         iwi_stop_locked(sc);
3250         iwi_rfkill_poll(sc);
3251         wlan_serialize_exit();
3252 }
3253
3254 static int
3255 iwi_sysctl_stats(SYSCTL_HANDLER_ARGS)
3256 {
3257         struct iwi_softc *sc = arg1;
3258         uint32_t size, buf[128];
3259
3260         memset(buf, 0, sizeof buf);
3261
3262         if (!(sc->flags & IWI_FLAG_FW_INITED))
3263                 return SYSCTL_OUT(req, buf, sizeof buf);
3264
3265         size = min(CSR_READ_4(sc, IWI_CSR_TABLE0_SIZE), 128 - 1);
3266         CSR_READ_REGION_4(sc, IWI_CSR_TABLE0_BASE, &buf[1], size);
3267
3268         return SYSCTL_OUT(req, buf, size);
3269 }
3270
3271 static int
3272 iwi_sysctl_radio(SYSCTL_HANDLER_ARGS)
3273 {
3274         struct iwi_softc *sc = arg1;
3275         int val = !iwi_getrfkill(sc);
3276
3277         return SYSCTL_OUT(req, &val, sizeof val);
3278 }
3279
3280 /*
3281  * Add sysctl knobs.
3282  */
3283 static void
3284 iwi_sysctlattach(struct iwi_softc *sc)
3285 {
3286         struct sysctl_ctx_list *ctx;
3287         struct sysctl_oid *tree;
3288
3289         ctx = device_get_sysctl_ctx(sc->sc_dev);
3290         tree = device_get_sysctl_tree(sc->sc_dev);
3291
3292         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "radio",
3293             CTLTYPE_INT | CTLFLAG_RD, sc, 0, iwi_sysctl_radio, "I",
3294             "radio transmitter switch state (0=off, 1=on)");
3295
3296         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "stats",
3297             CTLTYPE_OPAQUE | CTLFLAG_RD, sc, 0, iwi_sysctl_stats, "S",
3298             "statistics");
3299
3300         sc->bluetooth = 0;
3301         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "bluetooth",
3302             CTLFLAG_RW, &sc->bluetooth, 0, "bluetooth coexistence");
3303
3304         sc->antenna = IWI_ANTENNA_AUTO;
3305         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "antenna",
3306             CTLFLAG_RW, &sc->antenna, 0, "antenna (0=auto)");
3307 }
3308
3309 /*
3310  * LED support.
3311  *
3312  * Different cards have different capabilities.  Some have three
3313  * led's while others have only one.  The linux ipw driver defines
3314  * led's for link state (associated or not), band (11a, 11g, 11b),
3315  * and for link activity.  We use one led and vary the blink rate
3316  * according to the tx/rx traffic a la the ath driver.
3317  */
3318
3319 static __inline uint32_t
3320 iwi_toggle_event(uint32_t r)
3321 {
3322         return r &~ (IWI_RST_STANDBY | IWI_RST_GATE_ODMA |
3323                      IWI_RST_GATE_IDMA | IWI_RST_GATE_ADMA);
3324 }
3325
3326 static uint32_t
3327 iwi_read_event(struct iwi_softc *sc)
3328 {
3329         return MEM_READ_4(sc, IWI_MEM_EEPROM_EVENT);
3330 }
3331
3332 static void
3333 iwi_write_event(struct iwi_softc *sc, uint32_t v)
3334 {
3335         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, v);
3336 }
3337
3338 static void
3339 iwi_led_done(void *arg)
3340 {
3341         struct iwi_softc *sc = arg;
3342
3343         sc->sc_blinking = 0;
3344 }
3345
3346 /*
3347  * Turn the activity LED off: flip the pin and then set a timer so no
3348  * update will happen for the specified duration.
3349  */
3350 static void
3351 iwi_led_off(void *arg)
3352 {
3353         struct iwi_softc *sc = arg;
3354         uint32_t v;
3355
3356         v = iwi_read_event(sc);
3357         v &= ~sc->sc_ledpin;
3358         iwi_write_event(sc, iwi_toggle_event(v));
3359         callout_reset(&sc->sc_ledtimer_callout, sc->sc_ledoff, iwi_led_done, sc);
3360 }
3361
3362 /*
3363  * Blink the LED according to the specified on/off times.
3364  */
3365 static void
3366 iwi_led_blink(struct iwi_softc *sc, int on, int off)
3367 {
3368         uint32_t v;
3369
3370         v = iwi_read_event(sc);
3371         v |= sc->sc_ledpin;
3372         iwi_write_event(sc, iwi_toggle_event(v));
3373         sc->sc_blinking = 1;
3374         sc->sc_ledoff = off;
3375         callout_reset(&sc->sc_ledtimer_callout, on, iwi_led_off, sc);
3376 }
3377
3378 static void
3379 iwi_led_event(struct iwi_softc *sc, int event)
3380 {
3381         /* NB: on/off times from the Atheros NDIS driver, w/ permission */
3382         static const struct {
3383                 u_int           rate;           /* tx/rx iwi rate */
3384                 u_int16_t       timeOn;         /* LED on time (ms) */
3385                 u_int16_t       timeOff;        /* LED off time (ms) */
3386         } blinkrates[] = {
3387                 { IWI_RATE_OFDM54, 40,  10 },
3388                 { IWI_RATE_OFDM48, 44,  11 },
3389                 { IWI_RATE_OFDM36, 50,  13 },
3390                 { IWI_RATE_OFDM24, 57,  14 },
3391                 { IWI_RATE_OFDM18, 67,  16 },
3392                 { IWI_RATE_OFDM12, 80,  20 },
3393                 { IWI_RATE_DS11,  100,  25 },
3394                 { IWI_RATE_OFDM9, 133,  34 },
3395                 { IWI_RATE_OFDM6, 160,  40 },
3396                 { IWI_RATE_DS5,   200,  50 },
3397                 {            6,   240,  58 },   /* XXX 3Mb/s if it existed */
3398                 { IWI_RATE_DS2,   267,  66 },
3399                 { IWI_RATE_DS1,   400, 100 },
3400                 {            0,   500, 130 },   /* unknown rate/polling */
3401         };
3402         uint32_t txrate;
3403         int j = 0;                      /* XXX silence compiler */
3404
3405         sc->sc_ledevent = ticks;        /* time of last event */
3406         if (sc->sc_blinking)            /* don't interrupt active blink */
3407                 return;
3408         switch (event) {
3409         case IWI_LED_POLL:
3410                 j = NELEM(blinkrates)-1;
3411                 break;
3412         case IWI_LED_TX:
3413                 /* read current transmission rate from adapter */
3414                 txrate = CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE);
3415                 if (blinkrates[sc->sc_txrix].rate != txrate) {
3416                         for (j = 0; j < NELEM(blinkrates)-1; j++)
3417                                 if (blinkrates[j].rate == txrate)
3418                                         break;
3419                         sc->sc_txrix = j;
3420                 } else
3421                         j = sc->sc_txrix;
3422                 break;
3423         case IWI_LED_RX:
3424                 if (blinkrates[sc->sc_rxrix].rate != sc->sc_rxrate) {
3425                         for (j = 0; j < NELEM(blinkrates)-1; j++)
3426                                 if (blinkrates[j].rate == sc->sc_rxrate)
3427                                         break;
3428                         sc->sc_rxrix = j;
3429                 } else
3430                         j = sc->sc_rxrix;
3431                 break;
3432         }
3433         /* XXX beware of overflow */
3434         iwi_led_blink(sc, (blinkrates[j].timeOn * hz) / 1000,
3435                 (blinkrates[j].timeOff * hz) / 1000);
3436 }
3437
3438 static int
3439 iwi_sysctl_softled(SYSCTL_HANDLER_ARGS)
3440 {
3441         struct iwi_softc *sc = arg1;
3442         int softled = sc->sc_softled;
3443         int error;
3444
3445         error = sysctl_handle_int(oidp, &softled, 0, req);
3446         if (error || !req->newptr)
3447                 return error;
3448         softled = (softled != 0);
3449         if (softled != sc->sc_softled) {
3450                 if (softled) {
3451                         uint32_t v = iwi_read_event(sc);
3452                         v &= ~sc->sc_ledpin;
3453                         iwi_write_event(sc, iwi_toggle_event(v));
3454                 }
3455                 sc->sc_softled = softled;
3456         }
3457         return 0;
3458 }
3459
3460 static void
3461 iwi_ledattach(struct iwi_softc *sc)
3462 {
3463         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
3464         struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
3465
3466         sc->sc_blinking = 0;
3467         sc->sc_ledstate = 1;
3468         sc->sc_ledidle = (2700*hz)/1000;        /* 2.7sec */
3469         callout_init(&sc->sc_ledtimer_callout);
3470
3471         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3472                 "softled", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
3473                 iwi_sysctl_softled, "I", "enable/disable software LED support");
3474         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3475                 "ledpin", CTLFLAG_RW, &sc->sc_ledpin, 0,
3476                 "pin setting to turn activity LED on");
3477         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3478                 "ledidle", CTLFLAG_RW, &sc->sc_ledidle, 0,
3479                 "idle time for inactivity LED (ticks)");
3480         /* XXX for debugging */
3481         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3482                 "nictype", CTLFLAG_RD, &sc->sc_nictype, 0,
3483                 "NIC type from EEPROM");
3484
3485         sc->sc_ledpin = IWI_RST_LED_ACTIVITY;
3486         sc->sc_softled = 1;
3487
3488         sc->sc_nictype = (iwi_read_prom_word(sc, IWI_EEPROM_NIC) >> 8) & 0xff;
3489         if (sc->sc_nictype == 1) {
3490                 /*
3491                  * NB: led's are reversed.
3492                  */
3493                 sc->sc_ledpin = IWI_RST_LED_ASSOCIATED;
3494         }
3495 }
3496
3497 static void
3498 iwi_scan_start(struct ieee80211com *ic)
3499 {
3500         /* ignore */
3501 }
3502
3503 static void
3504 iwi_set_channel(struct ieee80211com *ic)
3505 {
3506         struct ifnet *ifp = ic->ic_ifp;
3507         struct iwi_softc *sc = ifp->if_softc;
3508         if (sc->fw_state == IWI_FW_IDLE)
3509                 iwi_setcurchan(sc, ic->ic_curchan->ic_ieee);
3510 }
3511
3512 static void
3513 iwi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
3514 {
3515         struct ieee80211vap *vap = ss->ss_vap;
3516         struct ifnet *ifp = vap->iv_ic->ic_ifp;
3517         struct iwi_softc *sc = ifp->if_softc;
3518
3519         if (iwi_scanchan(sc, maxdwell, 0))
3520                 ieee80211_cancel_scan(vap);
3521 }
3522
3523 static void
3524 iwi_scan_mindwell(struct ieee80211_scan_state *ss)
3525 {
3526         /* NB: don't try to abort scan; wait for firmware to finish */
3527 }
3528
3529 static void
3530 iwi_scan_end(struct ieee80211com *ic)
3531 {
3532         struct ifnet *ifp = ic->ic_ifp;
3533         struct iwi_softc *sc = ifp->if_softc;
3534
3535         sc->flags &= ~IWI_FLAG_CHANNEL_SCAN;
3536         /* NB: make sure we're still scanning */
3537         if (sc->fw_state == IWI_FW_SCANNING)
3538                 iwi_cmd(sc, IWI_CMD_ABORT_SCAN, NULL, 0);
3539 }