sys/dev/iwi/if_iwi.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2004, 2005
   5  *      Damien Bergamini <damien.bergamini@free.fr>. All rights reserved.
   6  * Copyright (c) 2005-2006 Sam Leffler, Errno Consulting
   7  * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org>
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice unmodified, this list of conditions, and the following
  14  *    disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 /*-
  36  * Intel(R) PRO/Wireless 2200BG/2225BG/2915ABG driver
  37  * http://www.intel.com/network/connectivity/products/wireless/prowireless_mobile.htm
  38  */
  39
  40 #include <sys/param.h>
  41 #include <sys/sysctl.h>
  42 #include <sys/sockio.h>
  43 #include <sys/mbuf.h>
  44 #include <sys/kernel.h>
  45 #include <sys/socket.h>
  46 #include <sys/systm.h>
  47 #include <sys/malloc.h>
  48 #include <sys/lock.h>
  49 #include <sys/mutex.h>
  50 #include <sys/module.h>
  51 #include <sys/bus.h>
  52 #include <sys/endian.h>
  53 #include <sys/proc.h>
  54 #include <sys/mount.h>
  55 #include <sys/namei.h>
  56 #include <sys/linker.h>
  57 #include <sys/firmware.h>
  58 #include <sys/taskqueue.h>
  59
  60 #include <machine/bus.h>
  61 #include <machine/resource.h>
  62 #include <sys/rman.h>
  63
  64 #include <dev/pci/pcireg.h>
  65 #include <dev/pci/pcivar.h>
  66
  67 #include <net/bpf.h>
  68 #include <net/if.h>
  69 #include <net/if_var.h>
  70 #include <net/if_arp.h>
  71 #include <net/ethernet.h>
  72 #include <net/if_dl.h>
  73 #include <net/if_media.h>
  74 #include <net/if_types.h>
  75
  76 #include <net80211/ieee80211_var.h>
  77 #include <net80211/ieee80211_radiotap.h>
  78 #include <net80211/ieee80211_input.h>
  79 #include <net80211/ieee80211_regdomain.h>
  80
  81 #include <netinet/in.h>
  82 #include <netinet/in_systm.h>
  83 #include <netinet/in_var.h>
  84 #include <netinet/ip.h>
  85 #include <netinet/if_ether.h>
  86
  87 #include <dev/iwi/if_iwireg.h>
  88 #include <dev/iwi/if_iwivar.h>
  89 #include <dev/iwi/if_iwi_ioctl.h>
  90
  91 #define IWI_DEBUG
  92 #ifdef IWI_DEBUG
  93 #define DPRINTF(x)      do { if (iwi_debug > 0) printf x; } while (0)
  94 #define DPRINTFN(n, x)  do { if (iwi_debug >= (n)) printf x; } while (0)
  95 int iwi_debug = 0;
  96 SYSCTL_INT(_debug, OID_AUTO, iwi, CTLFLAG_RW, &iwi_debug, 0, "iwi debug level");
  97
  98 static const char *iwi_fw_states[] = {
  99         "IDLE",                 /* IWI_FW_IDLE */
 100         "LOADING",              /* IWI_FW_LOADING */
 101         "ASSOCIATING",          /* IWI_FW_ASSOCIATING */
 102         "DISASSOCIATING",       /* IWI_FW_DISASSOCIATING */
 103         "SCANNING",             /* IWI_FW_SCANNING */
 104 };
 105 #else
 106 #define DPRINTF(x)
 107 #define DPRINTFN(n, x)
 108 #endif
 109
 110 MODULE_DEPEND(iwi, pci,  1, 1, 1);
 111 MODULE_DEPEND(iwi, wlan, 1, 1, 1);
 112 MODULE_DEPEND(iwi, firmware, 1, 1, 1);
 113
 114 enum {
 115         IWI_LED_TX,
 116         IWI_LED_RX,
 117         IWI_LED_POLL,
 118 };
 119
 120 struct iwi_ident {
 121         uint16_t        vendor;
 122         uint16_t        device;
 123         const char      *name;
 124 };
 125
 126 static const struct iwi_ident iwi_ident_table[] = {
 127         { 0x8086, 0x4220, "Intel(R) PRO/Wireless 2200BG" },
 128         { 0x8086, 0x4221, "Intel(R) PRO/Wireless 2225BG" },
 129         { 0x8086, 0x4223, "Intel(R) PRO/Wireless 2915ABG" },
 130         { 0x8086, 0x4224, "Intel(R) PRO/Wireless 2915ABG" },
 131
 132         { 0, 0, NULL }
 133 };
 134
 135 static const uint8_t def_chan_5ghz_band1[] =
 136         { 36, 40, 44, 48, 52, 56, 60, 64 };
 137 static const uint8_t def_chan_5ghz_band2[] =
 138         { 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 };
 139 static const uint8_t def_chan_5ghz_band3[] =
 140         { 149, 153, 157, 161, 165 };
 141
 142 static struct ieee80211vap *iwi_vap_create(struct ieee80211com *,
 143                     const char [IFNAMSIZ], int, enum ieee80211_opmode, int,
 144                     const uint8_t [IEEE80211_ADDR_LEN],
 145                     const uint8_t [IEEE80211_ADDR_LEN]);
 146 static void     iwi_vap_delete(struct ieee80211vap *);
 147 static void     iwi_dma_map_addr(void *, bus_dma_segment_t *, int, int);
 148 static int      iwi_alloc_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *,
 149                     int);
 150 static void     iwi_reset_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 151 static void     iwi_free_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 152 static int      iwi_alloc_tx_ring(struct iwi_softc *, struct iwi_tx_ring *,
 153                     int, bus_addr_t, bus_addr_t);
 154 static void     iwi_reset_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 155 static void     iwi_free_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 156 static int      iwi_alloc_rx_ring(struct iwi_softc *, struct iwi_rx_ring *,
 157                     int);
 158 static void     iwi_reset_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 159 static void     iwi_free_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 160 static struct ieee80211_node *iwi_node_alloc(struct ieee80211vap *,
 161                     const uint8_t [IEEE80211_ADDR_LEN]);
 162 static void     iwi_node_free(struct ieee80211_node *);
 163 static void     iwi_media_status(struct ifnet *, struct ifmediareq *);
 164 static int      iwi_newstate(struct ieee80211vap *, enum ieee80211_state, int);
 165 static void     iwi_wme_init(struct iwi_softc *);
 166 static int      iwi_wme_setparams(struct iwi_softc *);
 167 static int      iwi_wme_update(struct ieee80211com *);
 168 static uint16_t iwi_read_prom_word(struct iwi_softc *, uint8_t);
 169 static void     iwi_frame_intr(struct iwi_softc *, struct iwi_rx_data *, int,
 170                     struct iwi_frame *);
 171 static void     iwi_notification_intr(struct iwi_softc *, struct iwi_notif *);
 172 static void     iwi_rx_intr(struct iwi_softc *);
 173 static void     iwi_tx_intr(struct iwi_softc *, struct iwi_tx_ring *);
 174 static void     iwi_intr(void *);
 175 static int      iwi_cmd(struct iwi_softc *, uint8_t, void *, uint8_t);
 176 static void     iwi_write_ibssnode(struct iwi_softc *, const u_int8_t [], int);
 177 static int      iwi_tx_start(struct iwi_softc *, struct mbuf *,
 178                     struct ieee80211_node *, int);
 179 static int      iwi_raw_xmit(struct ieee80211_node *, struct mbuf *,
 180                     const struct ieee80211_bpf_params *);
 181 static void     iwi_start(struct iwi_softc *);
 182 static int      iwi_transmit(struct ieee80211com *, struct mbuf *);
 183 static void     iwi_watchdog(void *);
 184 static int      iwi_ioctl(struct ieee80211com *, u_long, void *);
 185 static void     iwi_parent(struct ieee80211com *);
 186 static void     iwi_stop_master(struct iwi_softc *);
 187 static int      iwi_reset(struct iwi_softc *);
 188 static int      iwi_load_ucode(struct iwi_softc *, const struct iwi_fw *);
 189 static int      iwi_load_firmware(struct iwi_softc *, const struct iwi_fw *);
 190 static void     iwi_release_fw_dma(struct iwi_softc *sc);
 191 static int      iwi_config(struct iwi_softc *);
 192 static int      iwi_get_firmware(struct iwi_softc *, enum ieee80211_opmode);
 193 static void     iwi_put_firmware(struct iwi_softc *);
 194 static void     iwi_monitor_scan(void *, int);
 195 static int      iwi_scanchan(struct iwi_softc *, unsigned long, int);
 196 static void     iwi_scan_start(struct ieee80211com *);
 197 static void     iwi_scan_end(struct ieee80211com *);
 198 static void     iwi_set_channel(struct ieee80211com *);
 199 static void     iwi_scan_curchan(struct ieee80211_scan_state *, unsigned long maxdwell);
 200 static void     iwi_scan_mindwell(struct ieee80211_scan_state *);
 201 static int      iwi_auth_and_assoc(struct iwi_softc *, struct ieee80211vap *);
 202 static void     iwi_disassoc(void *, int);
 203 static int      iwi_disassociate(struct iwi_softc *, int quiet);
 204 static void     iwi_init_locked(struct iwi_softc *);
 205 static void     iwi_init(void *);
 206 static int      iwi_init_fw_dma(struct iwi_softc *, int);
 207 static void     iwi_stop_locked(void *);
 208 static void     iwi_stop(struct iwi_softc *);
 209 static void     iwi_restart(void *, int);
 210 static int      iwi_getrfkill(struct iwi_softc *);
 211 static void     iwi_radio_on(void *, int);
 212 static void     iwi_radio_off(void *, int);
 213 static void     iwi_sysctlattach(struct iwi_softc *);
 214 static void     iwi_led_event(struct iwi_softc *, int);
 215 static void     iwi_ledattach(struct iwi_softc *);
 216 static void     iwi_collect_bands(struct ieee80211com *, uint8_t [], size_t);
 217 static void     iwi_getradiocaps(struct ieee80211com *, int, int *,
 218                     struct ieee80211_channel []);
 219
 220 static int iwi_probe(device_t);
 221 static int iwi_attach(device_t);
 222 static int iwi_detach(device_t);
 223 static int iwi_shutdown(device_t);
 224 static int iwi_suspend(device_t);
 225 static int iwi_resume(device_t);
 226
 227 static device_method_t iwi_methods[] = {
 228         /* Device interface */
 229         DEVMETHOD(device_probe,         iwi_probe),
 230         DEVMETHOD(device_attach,        iwi_attach),
 231         DEVMETHOD(device_detach,        iwi_detach),
 232         DEVMETHOD(device_shutdown,      iwi_shutdown),
 233         DEVMETHOD(device_suspend,       iwi_suspend),
 234         DEVMETHOD(device_resume,        iwi_resume),
 235
 236         DEVMETHOD_END
 237 };
 238
 239 static driver_t iwi_driver = {
 240         "iwi",
 241         iwi_methods,
 242         sizeof (struct iwi_softc)
 243 };
 244
 245 static devclass_t iwi_devclass;
 246
 247 DRIVER_MODULE(iwi, pci, iwi_driver, iwi_devclass, NULL, NULL);
 248
 249 MODULE_VERSION(iwi, 1);
 250
 251 static __inline uint8_t
 252 MEM_READ_1(struct iwi_softc *sc, uint32_t addr)
 253 {
 254         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 255         return CSR_READ_1(sc, IWI_CSR_INDIRECT_DATA);
 256 }
 257
 258 static __inline uint32_t
 259 MEM_READ_4(struct iwi_softc *sc, uint32_t addr)
 260 {
 261         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 262         return CSR_READ_4(sc, IWI_CSR_INDIRECT_DATA);
 263 }
 264
 265 static int
 266 iwi_probe(device_t dev)
 267 {
 268         const struct iwi_ident *ident;
 269
 270         for (ident = iwi_ident_table; ident->name != NULL; ident++) {
 271                 if (pci_get_vendor(dev) == ident->vendor &&
 272                     pci_get_device(dev) == ident->device) {
 273                         device_set_desc(dev, ident->name);
 274                         return (BUS_PROBE_DEFAULT);
 275                 }
 276         }
 277         return ENXIO;
 278 }
 279
 280 static int
 281 iwi_attach(device_t dev)
 282 {
 283         struct iwi_softc *sc = device_get_softc(dev);
 284         struct ieee80211com *ic = &sc->sc_ic;
 285         uint16_t val;
 286         int i, error;
 287
 288         sc->sc_dev = dev;
 289         sc->sc_ledevent = ticks;
 290
 291         IWI_LOCK_INIT(sc);
 292         mbufq_init(&sc->sc_snd, ifqmaxlen);
 293
 294         sc->sc_unr = new_unrhdr(1, IWI_MAX_IBSSNODE-1, &sc->sc_mtx);
 295
 296         TASK_INIT(&sc->sc_radiontask, 0, iwi_radio_on, sc);
 297         TASK_INIT(&sc->sc_radiofftask, 0, iwi_radio_off, sc);
 298         TASK_INIT(&sc->sc_restarttask, 0, iwi_restart, sc);
 299         TASK_INIT(&sc->sc_disassoctask, 0, iwi_disassoc, sc);
 300         TASK_INIT(&sc->sc_monitortask, 0, iwi_monitor_scan, sc);
 301
 302         callout_init_mtx(&sc->sc_wdtimer, &sc->sc_mtx, 0);
 303         callout_init_mtx(&sc->sc_rftimer, &sc->sc_mtx, 0);
 304
 305         pci_write_config(dev, 0x41, 0, 1);
 306
 307         /* enable bus-mastering */
 308         pci_enable_busmaster(dev);
 309
 310         i = PCIR_BAR(0);
 311         sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i, RF_ACTIVE);
 312         if (sc->mem == NULL) {
 313                 device_printf(dev, "could not allocate memory resource\n");
 314                 goto fail;
 315         }
 316
 317         sc->sc_st = rman_get_bustag(sc->mem);
 318         sc->sc_sh = rman_get_bushandle(sc->mem);
 319
 320         i = 0;
 321         sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i,
 322             RF_ACTIVE | RF_SHAREABLE);
 323         if (sc->irq == NULL) {
 324                 device_printf(dev, "could not allocate interrupt resource\n");
 325                 goto fail;
 326         }
 327
 328         if (iwi_reset(sc) != 0) {
 329                 device_printf(dev, "could not reset adapter\n");
 330                 goto fail;
 331         }
 332
 333         /*
 334          * Allocate rings.
 335          */
 336         if (iwi_alloc_cmd_ring(sc, &sc->cmdq, IWI_CMD_RING_COUNT) != 0) {
 337                 device_printf(dev, "could not allocate Cmd ring\n");
 338                 goto fail;
 339         }
 340
 341         for (i = 0; i < 4; i++) {
 342                 error = iwi_alloc_tx_ring(sc, &sc->txq[i], IWI_TX_RING_COUNT,
 343                     IWI_CSR_TX1_RIDX + i * 4,
 344                     IWI_CSR_TX1_WIDX + i * 4);
 345                 if (error != 0) {
 346                         device_printf(dev, "could not allocate Tx ring %d\n",
 347                                 i+i);
 348                         goto fail;
 349                 }
 350         }
 351
 352         if (iwi_alloc_rx_ring(sc, &sc->rxq, IWI_RX_RING_COUNT) != 0) {
 353                 device_printf(dev, "could not allocate Rx ring\n");
 354                 goto fail;
 355         }
 356
 357         iwi_wme_init(sc);
 358
 359         ic->ic_softc = sc;
 360         ic->ic_name = device_get_nameunit(dev);
 361         ic->ic_opmode = IEEE80211_M_STA;
 362         ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
 363
 364         /* set device capabilities */
 365         ic->ic_caps =
 366               IEEE80211_C_STA           /* station mode supported */
 367             | IEEE80211_C_IBSS          /* IBSS mode supported */
 368             | IEEE80211_C_MONITOR       /* monitor mode supported */
 369             | IEEE80211_C_PMGT          /* power save supported */
 370             | IEEE80211_C_SHPREAMBLE    /* short preamble supported */
 371             | IEEE80211_C_WPA           /* 802.11i */
 372             | IEEE80211_C_WME           /* 802.11e */
 373 #if 0
 374             | IEEE80211_C_BGSCAN        /* capable of bg scanning */
 375 #endif
 376             ;
 377
 378         /* read MAC address from EEPROM */
 379         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 0);
 380         ic->ic_macaddr[0] = val & 0xff;
 381         ic->ic_macaddr[1] = val >> 8;
 382         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 1);
 383         ic->ic_macaddr[2] = val & 0xff;
 384         ic->ic_macaddr[3] = val >> 8;
 385         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 2);
 386         ic->ic_macaddr[4] = val & 0xff;
 387         ic->ic_macaddr[5] = val >> 8;
 388
 389         iwi_getradiocaps(ic, IEEE80211_CHAN_MAX, &ic->ic_nchans,
 390             ic->ic_channels);
 391
 392         ieee80211_ifattach(ic);
 393         /* override default methods */
 394         ic->ic_node_alloc = iwi_node_alloc;
 395         sc->sc_node_free = ic->ic_node_free;
 396         ic->ic_node_free = iwi_node_free;
 397         ic->ic_raw_xmit = iwi_raw_xmit;
 398         ic->ic_scan_start = iwi_scan_start;
 399         ic->ic_scan_end = iwi_scan_end;
 400         ic->ic_set_channel = iwi_set_channel;
 401         ic->ic_scan_curchan = iwi_scan_curchan;
 402         ic->ic_scan_mindwell = iwi_scan_mindwell;
 403         ic->ic_wme.wme_update = iwi_wme_update;
 404
 405         ic->ic_vap_create = iwi_vap_create;
 406         ic->ic_vap_delete = iwi_vap_delete;
 407         ic->ic_ioctl = iwi_ioctl;
 408         ic->ic_transmit = iwi_transmit;
 409         ic->ic_parent = iwi_parent;
 410         ic->ic_getradiocaps = iwi_getradiocaps;
 411
 412         ieee80211_radiotap_attach(ic,
 413             &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
 414                 IWI_TX_RADIOTAP_PRESENT,
 415             &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
 416                 IWI_RX_RADIOTAP_PRESENT);
 417
 418         iwi_sysctlattach(sc);
 419         iwi_ledattach(sc);
 420
 421         /*
 422          * Hook our interrupt after all initialization is complete.
 423          */
 424         error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE,
 425             NULL, iwi_intr, sc, &sc->sc_ih);
 426         if (error != 0) {
 427                 device_printf(dev, "could not set up interrupt\n");
 428                 goto fail;
 429         }
 430
 431         if (bootverbose)
 432                 ieee80211_announce(ic);
 433
 434         return 0;
 435 fail:
 436         /* XXX fix */
 437         iwi_detach(dev);
 438         return ENXIO;
 439 }
 440
 441 static int
 442 iwi_detach(device_t dev)
 443 {
 444         struct iwi_softc *sc = device_get_softc(dev);
 445         struct ieee80211com *ic = &sc->sc_ic;
 446
 447         bus_teardown_intr(dev, sc->irq, sc->sc_ih);
 448
 449         /* NB: do early to drain any pending tasks */
 450         ieee80211_draintask(ic, &sc->sc_radiontask);
 451         ieee80211_draintask(ic, &sc->sc_radiofftask);
 452         ieee80211_draintask(ic, &sc->sc_restarttask);
 453         ieee80211_draintask(ic, &sc->sc_disassoctask);
 454         ieee80211_draintask(ic, &sc->sc_monitortask);
 455
 456         iwi_stop(sc);
 457
 458         ieee80211_ifdetach(ic);
 459
 460         iwi_put_firmware(sc);
 461         iwi_release_fw_dma(sc);
 462
 463         iwi_free_cmd_ring(sc, &sc->cmdq);
 464         iwi_free_tx_ring(sc, &sc->txq[0]);
 465         iwi_free_tx_ring(sc, &sc->txq[1]);
 466         iwi_free_tx_ring(sc, &sc->txq[2]);
 467         iwi_free_tx_ring(sc, &sc->txq[3]);
 468         iwi_free_rx_ring(sc, &sc->rxq);
 469
 470         bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq), sc->irq);
 471
 472         bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(sc->mem),
 473             sc->mem);
 474
 475         delete_unrhdr(sc->sc_unr);
 476         mbufq_drain(&sc->sc_snd);
 477
 478         IWI_LOCK_DESTROY(sc);
 479
 480         return 0;
 481 }
 482
 483 static struct ieee80211vap *
 484 iwi_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
 485     enum ieee80211_opmode opmode, int flags,
 486     const uint8_t bssid[IEEE80211_ADDR_LEN],
 487     const uint8_t mac[IEEE80211_ADDR_LEN])
 488 {
 489         struct iwi_softc *sc = ic->ic_softc;
 490         struct iwi_vap *ivp;
 491         struct ieee80211vap *vap;
 492         int i;
 493
 494         if (!TAILQ_EMPTY(&ic->ic_vaps))         /* only one at a time */
 495                 return NULL;
 496         /*
 497          * Get firmware image (and possibly dma memory) on mode change.
 498          */
 499         if (iwi_get_firmware(sc, opmode))
 500                 return NULL;
 501         /* allocate DMA memory for mapping firmware image */
 502         i = sc->fw_fw.size;
 503         if (sc->fw_boot.size > i)
 504                 i = sc->fw_boot.size;
 505         /* XXX do we dma the ucode as well ? */
 506         if (sc->fw_uc.size > i)
 507                 i = sc->fw_uc.size;
 508         if (iwi_init_fw_dma(sc, i))
 509                 return NULL;
 510
 511         ivp = malloc(sizeof(struct iwi_vap), M_80211_VAP, M_WAITOK | M_ZERO);
 512         vap = &ivp->iwi_vap;
 513         ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid);
 514         /* override the default, the setting comes from the linux driver */
 515         vap->iv_bmissthreshold = 24;
 516         /* override with driver methods */
 517         ivp->iwi_newstate = vap->iv_newstate;
 518         vap->iv_newstate = iwi_newstate;
 519
 520         /* complete setup */
 521         ieee80211_vap_attach(vap, ieee80211_media_change, iwi_media_status,
 522             mac);
 523         ic->ic_opmode = opmode;
 524         return vap;
 525 }
 526
 527 static void
 528 iwi_vap_delete(struct ieee80211vap *vap)
 529 {
 530         struct iwi_vap *ivp = IWI_VAP(vap);
 531
 532         ieee80211_vap_detach(vap);
 533         free(ivp, M_80211_VAP);
 534 }
 535
 536 static void
 537 iwi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 538 {
 539         if (error != 0)
 540                 return;
 541
 542         KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
 543
 544         *(bus_addr_t *)arg = segs[0].ds_addr;
 545 }
 546
 547 static int
 548 iwi_alloc_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring, int count)
 549 {
 550         int error;
 551
 552         ring->count = count;
 553         ring->queued = 0;
 554         ring->cur = ring->next = 0;
 555
 556         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
 557             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 558             count * IWI_CMD_DESC_SIZE, 1, count * IWI_CMD_DESC_SIZE, 0,
 559             NULL, NULL, &ring->desc_dmat);
 560         if (error != 0) {
 561                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 562                 goto fail;
 563         }
 564
 565         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 566             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 567         if (error != 0) {
 568                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 569                 goto fail;
 570         }
 571
 572         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 573             count * IWI_CMD_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 574         if (error != 0) {
 575                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 576                 goto fail;
 577         }
 578
 579         return 0;
 580
 581 fail:   iwi_free_cmd_ring(sc, ring);
 582         return error;
 583 }
 584
 585 static void
 586 iwi_reset_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 587 {
 588         ring->queued = 0;
 589         ring->cur = ring->next = 0;
 590 }
 591
 592 static void
 593 iwi_free_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 594 {
 595         if (ring->desc != NULL) {
 596                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 597                     BUS_DMASYNC_POSTWRITE);
 598                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 599                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 600         }
 601
 602         if (ring->desc_dmat != NULL)
 603                 bus_dma_tag_destroy(ring->desc_dmat);
 604 }
 605
 606 static int
 607 iwi_alloc_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring, int count,
 608     bus_addr_t csr_ridx, bus_addr_t csr_widx)
 609 {
 610         int i, error;
 611
 612         ring->count = count;
 613         ring->queued = 0;
 614         ring->cur = ring->next = 0;
 615         ring->csr_ridx = csr_ridx;
 616         ring->csr_widx = csr_widx;
 617
 618         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
 619             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 620             count * IWI_TX_DESC_SIZE, 1, count * IWI_TX_DESC_SIZE, 0, NULL,
 621             NULL, &ring->desc_dmat);
 622         if (error != 0) {
 623                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 624                 goto fail;
 625         }
 626
 627         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 628             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 629         if (error != 0) {
 630                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 631                 goto fail;
 632         }
 633
 634         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 635             count * IWI_TX_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 636         if (error != 0) {
 637                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 638                 goto fail;
 639         }
 640
 641         ring->data = malloc(count * sizeof (struct iwi_tx_data), M_DEVBUF,
 642             M_NOWAIT | M_ZERO);
 643         if (ring->data == NULL) {
 644                 device_printf(sc->sc_dev, "could not allocate soft data\n");
 645                 error = ENOMEM;
 646                 goto fail;
 647         }
 648
 649         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
 650         BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
 651         IWI_MAX_NSEG, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
 652         if (error != 0) {
 653                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 654                 goto fail;
 655         }
 656
 657         for (i = 0; i < count; i++) {
 658                 error = bus_dmamap_create(ring->data_dmat, 0,
 659                     &ring->data[i].map);
 660                 if (error != 0) {
 661                         device_printf(sc->sc_dev, "could not create DMA map\n");
 662                         goto fail;
 663                 }
 664         }
 665
 666         return 0;
 667
 668 fail:   iwi_free_tx_ring(sc, ring);
 669         return error;
 670 }
 671
 672 static void
 673 iwi_reset_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 674 {
 675         struct iwi_tx_data *data;
 676         int i;
 677
 678         for (i = 0; i < ring->count; i++) {
 679                 data = &ring->data[i];
 680
 681                 if (data->m != NULL) {
 682                         bus_dmamap_sync(ring->data_dmat, data->map,
 683                             BUS_DMASYNC_POSTWRITE);
 684                         bus_dmamap_unload(ring->data_dmat, data->map);
 685                         m_freem(data->m);
 686                         data->m = NULL;
 687                 }
 688
 689                 if (data->ni != NULL) {
 690                         ieee80211_free_node(data->ni);
 691                         data->ni = NULL;
 692                 }
 693         }
 694
 695         ring->queued = 0;
 696         ring->cur = ring->next = 0;
 697 }
 698
 699 static void
 700 iwi_free_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 701 {
 702         struct iwi_tx_data *data;
 703         int i;
 704
 705         if (ring->desc != NULL) {
 706                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 707                     BUS_DMASYNC_POSTWRITE);
 708                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 709                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 710         }
 711
 712         if (ring->desc_dmat != NULL)
 713                 bus_dma_tag_destroy(ring->desc_dmat);
 714
 715         if (ring->data != NULL) {
 716                 for (i = 0; i < ring->count; i++) {
 717                         data = &ring->data[i];
 718
 719                         if (data->m != NULL) {
 720                                 bus_dmamap_sync(ring->data_dmat, data->map,
 721                                     BUS_DMASYNC_POSTWRITE);
 722                                 bus_dmamap_unload(ring->data_dmat, data->map);
 723                                 m_freem(data->m);
 724                         }
 725
 726                         if (data->ni != NULL)
 727                                 ieee80211_free_node(data->ni);
 728
 729                         if (data->map != NULL)
 730                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 731                 }
 732
 733                 free(ring->data, M_DEVBUF);
 734         }
 735
 736         if (ring->data_dmat != NULL)
 737                 bus_dma_tag_destroy(ring->data_dmat);
 738 }
 739
 740 static int
 741 iwi_alloc_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring, int count)
 742 {
 743         struct iwi_rx_data *data;
 744         int i, error;
 745
 746         ring->count = count;
 747         ring->cur = 0;
 748
 749         ring->data = malloc(count * sizeof (struct iwi_rx_data), M_DEVBUF,
 750             M_NOWAIT | M_ZERO);
 751         if (ring->data == NULL) {
 752                 device_printf(sc->sc_dev, "could not allocate soft data\n");
 753                 error = ENOMEM;
 754                 goto fail;
 755         }
 756
 757         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
 758             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
 759             1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
 760         if (error != 0) {
 761                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 762                 goto fail;
 763         }
 764
 765         for (i = 0; i < count; i++) {
 766                 data = &ring->data[i];
 767
 768                 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
 769                 if (error != 0) {
 770                         device_printf(sc->sc_dev, "could not create DMA map\n");
 771                         goto fail;
 772                 }
 773
 774                 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
 775                 if (data->m == NULL) {
 776                         device_printf(sc->sc_dev,
 777                             "could not allocate rx mbuf\n");
 778                         error = ENOMEM;
 779                         goto fail;
 780                 }
 781
 782                 error = bus_dmamap_load(ring->data_dmat, data->map,
 783                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
 784                     &data->physaddr, 0);
 785                 if (error != 0) {
 786                         device_printf(sc->sc_dev,
 787                             "could not load rx buf DMA map");
 788                         goto fail;
 789                 }
 790
 791                 data->reg = IWI_CSR_RX_BASE + i * 4;
 792         }
 793
 794         return 0;
 795
 796 fail:   iwi_free_rx_ring(sc, ring);
 797         return error;
 798 }
 799
 800 static void
 801 iwi_reset_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 802 {
 803         ring->cur = 0;
 804 }
 805
 806 static void
 807 iwi_free_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 808 {
 809         struct iwi_rx_data *data;
 810         int i;
 811
 812         if (ring->data != NULL) {
 813                 for (i = 0; i < ring->count; i++) {
 814                         data = &ring->data[i];
 815
 816                         if (data->m != NULL) {
 817                                 bus_dmamap_sync(ring->data_dmat, data->map,
 818                                     BUS_DMASYNC_POSTREAD);
 819                                 bus_dmamap_unload(ring->data_dmat, data->map);
 820                                 m_freem(data->m);
 821                         }
 822
 823                         if (data->map != NULL)
 824                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 825                 }
 826
 827                 free(ring->data, M_DEVBUF);
 828         }
 829
 830         if (ring->data_dmat != NULL)
 831                 bus_dma_tag_destroy(ring->data_dmat);
 832 }
 833
 834 static int
 835 iwi_shutdown(device_t dev)
 836 {
 837         struct iwi_softc *sc = device_get_softc(dev);
 838
 839         iwi_stop(sc);
 840         iwi_put_firmware(sc);           /* ??? XXX */
 841
 842         return 0;
 843 }
 844
 845 static int
 846 iwi_suspend(device_t dev)
 847 {
 848         struct iwi_softc *sc = device_get_softc(dev);
 849         struct ieee80211com *ic = &sc->sc_ic;
 850
 851         ieee80211_suspend_all(ic);
 852         return 0;
 853 }
 854
 855 static int
 856 iwi_resume(device_t dev)
 857 {
 858         struct iwi_softc *sc = device_get_softc(dev);
 859         struct ieee80211com *ic = &sc->sc_ic;
 860
 861         pci_write_config(dev, 0x41, 0, 1);
 862
 863         ieee80211_resume_all(ic);
 864         return 0;
 865 }
 866
 867 static struct ieee80211_node *
 868 iwi_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN])
 869 {
 870         struct iwi_node *in;
 871
 872         in = malloc(sizeof (struct iwi_node), M_80211_NODE, M_NOWAIT | M_ZERO);
 873         if (in == NULL)
 874                 return NULL;
 875         /* XXX assign sta table entry for adhoc */
 876         in->in_station = -1;
 877
 878         return &in->in_node;
 879 }
 880
 881 static void
 882 iwi_node_free(struct ieee80211_node *ni)
 883 {
 884         struct ieee80211com *ic = ni->ni_ic;
 885         struct iwi_softc *sc = ic->ic_softc;
 886         struct iwi_node *in = (struct iwi_node *)ni;
 887
 888         if (in->in_station != -1) {
 889                 DPRINTF(("%s mac %6D station %u\n", __func__,
 890                     ni->ni_macaddr, ":", in->in_station));
 891                 free_unr(sc->sc_unr, in->in_station);
 892         }
 893
 894         sc->sc_node_free(ni);
 895 }
 896
 897 /*
 898  * Convert h/w rate code to IEEE rate code.
 899  */
 900 static int
 901 iwi_cvtrate(int iwirate)
 902 {
 903         switch (iwirate) {
 904         case IWI_RATE_DS1:      return 2;
 905         case IWI_RATE_DS2:      return 4;
 906         case IWI_RATE_DS5:      return 11;
 907         case IWI_RATE_DS11:     return 22;
 908         case IWI_RATE_OFDM6:    return 12;
 909         case IWI_RATE_OFDM9:    return 18;
 910         case IWI_RATE_OFDM12:   return 24;
 911         case IWI_RATE_OFDM18:   return 36;
 912         case IWI_RATE_OFDM24:   return 48;
 913         case IWI_RATE_OFDM36:   return 72;
 914         case IWI_RATE_OFDM48:   return 96;
 915         case IWI_RATE_OFDM54:   return 108;
 916         }
 917         return 0;
 918 }
 919
 920 /*
 921  * The firmware automatically adapts the transmit speed.  We report its current
 922  * value here.
 923  */
 924 static void
 925 iwi_media_status(struct ifnet *ifp, struct ifmediareq *imr)
 926 {
 927         struct ieee80211vap *vap = ifp->if_softc;
 928         struct ieee80211com *ic = vap->iv_ic;
 929         struct iwi_softc *sc = ic->ic_softc;
 930         struct ieee80211_node *ni;
 931
 932         /* read current transmission rate from adapter */
 933         ni = ieee80211_ref_node(vap->iv_bss);
 934         ni->ni_txrate =
 935             iwi_cvtrate(CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE));
 936         ieee80211_free_node(ni);
 937         ieee80211_media_status(ifp, imr);
 938 }
 939
 940 static int
 941 iwi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 942 {
 943         struct iwi_vap *ivp = IWI_VAP(vap);
 944         struct ieee80211com *ic = vap->iv_ic;
 945         struct iwi_softc *sc = ic->ic_softc;
 946         IWI_LOCK_DECL;
 947
 948         DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__,
 949                 ieee80211_state_name[vap->iv_state],
 950                 ieee80211_state_name[nstate], sc->flags));
 951
 952         IEEE80211_UNLOCK(ic);
 953         IWI_LOCK(sc);
 954         switch (nstate) {
 955         case IEEE80211_S_INIT:
 956                 /*
 957                  * NB: don't try to do this if iwi_stop_master has
 958                  *     shutdown the firmware and disabled interrupts.
 959                  */
 960                 if (vap->iv_state == IEEE80211_S_RUN &&
 961                     (sc->flags & IWI_FLAG_FW_INITED))
 962                         iwi_disassociate(sc, 0);
 963                 break;
 964         case IEEE80211_S_AUTH:
 965                 iwi_auth_and_assoc(sc, vap);
 966                 break;
 967         case IEEE80211_S_RUN:
 968                 if (vap->iv_opmode == IEEE80211_M_IBSS &&
 969                     vap->iv_state == IEEE80211_S_SCAN) {
 970                         /*
 971                          * XXX when joining an ibss network we are called
 972                          * with a SCAN -> RUN transition on scan complete.
 973                          * Use that to call iwi_auth_and_assoc.  On completing
 974                          * the join we are then called again with an
 975                          * AUTH -> RUN transition and we want to do nothing.
 976                          * This is all totally bogus and needs to be redone.
 977                          */
 978                         iwi_auth_and_assoc(sc, vap);
 979                 } else if (vap->iv_opmode == IEEE80211_M_MONITOR)
 980                         ieee80211_runtask(ic, &sc->sc_monitortask);
 981                 break;
 982         case IEEE80211_S_ASSOC:
 983                 /*
 984                  * If we are transitioning from AUTH then just wait
 985                  * for the ASSOC status to come back from the firmware.
 986                  * Otherwise we need to issue the association request.
 987                  */
 988                 if (vap->iv_state == IEEE80211_S_AUTH)
 989                         break;
 990                 iwi_auth_and_assoc(sc, vap);
 991                 break;
 992         default:
 993                 break;
 994         }
 995         IWI_UNLOCK(sc);
 996         IEEE80211_LOCK(ic);
 997         return ivp->iwi_newstate(vap, nstate, arg);
 998 }
 999
1000 /*
1001  * WME parameters coming from IEEE 802.11e specification.  These values are
1002  * already declared in ieee80211_proto.c, but they are static so they can't
1003  * be reused here.
1004  */
1005 static const struct wmeParams iwi_wme_cck_params[WME_NUM_AC] = {
1006         { 0, 3, 5,  7,   0 },   /* WME_AC_BE */
1007         { 0, 3, 5, 10,   0 },   /* WME_AC_BK */
1008         { 0, 2, 4,  5, 188 },   /* WME_AC_VI */
1009         { 0, 2, 3,  4, 102 }    /* WME_AC_VO */
1010 };
1011
1012 static const struct wmeParams iwi_wme_ofdm_params[WME_NUM_AC] = {
1013         { 0, 3, 4,  6,   0 },   /* WME_AC_BE */
1014         { 0, 3, 4, 10,   0 },   /* WME_AC_BK */
1015         { 0, 2, 3,  4,  94 },   /* WME_AC_VI */
1016         { 0, 2, 2,  3,  47 }    /* WME_AC_VO */
1017 };
1018 #define IWI_EXP2(v)     htole16((1 << (v)) - 1)
1019 #define IWI_USEC(v)     htole16(IEEE80211_TXOP_TO_US(v))
1020
1021 static void
1022 iwi_wme_init(struct iwi_softc *sc)
1023 {
1024         const struct wmeParams *wmep;
1025         int ac;
1026
1027         memset(sc->wme, 0, sizeof sc->wme);
1028         for (ac = 0; ac < WME_NUM_AC; ac++) {
1029                 /* set WME values for CCK modulation */
1030                 wmep = &iwi_wme_cck_params[ac];
1031                 sc->wme[1].aifsn[ac] = wmep->wmep_aifsn;
1032                 sc->wme[1].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1033                 sc->wme[1].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1034                 sc->wme[1].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1035                 sc->wme[1].acm[ac]   = wmep->wmep_acm;
1036
1037                 /* set WME values for OFDM modulation */
1038                 wmep = &iwi_wme_ofdm_params[ac];
1039                 sc->wme[2].aifsn[ac] = wmep->wmep_aifsn;
1040                 sc->wme[2].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1041                 sc->wme[2].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1042                 sc->wme[2].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1043                 sc->wme[2].acm[ac]   = wmep->wmep_acm;
1044         }
1045 }
1046
1047 static int
1048 iwi_wme_setparams(struct iwi_softc *sc)
1049 {
1050         struct ieee80211com *ic = &sc->sc_ic;
1051         struct chanAccParams chp;
1052         const struct wmeParams *wmep;
1053         int ac;
1054
1055         ieee80211_wme_ic_getparams(ic, &chp);
1056
1057         for (ac = 0; ac < WME_NUM_AC; ac++) {
1058                 /* set WME values for current operating mode */
1059                 wmep = &chp.cap_wmeParams[ac];
1060                 sc->wme[0].aifsn[ac] = wmep->wmep_aifsn;
1061                 sc->wme[0].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1062                 sc->wme[0].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1063                 sc->wme[0].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1064                 sc->wme[0].acm[ac]   = wmep->wmep_acm;
1065         }
1066
1067         DPRINTF(("Setting WME parameters\n"));
1068         return iwi_cmd(sc, IWI_CMD_SET_WME_PARAMS, sc->wme, sizeof sc->wme);
1069 }
1070 #undef IWI_USEC
1071 #undef IWI_EXP2
1072
1073 static int
1074 iwi_wme_update(struct ieee80211com *ic)
1075 {
1076         struct iwi_softc *sc = ic->ic_softc;
1077         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1078         IWI_LOCK_DECL;
1079
1080         /*
1081          * We may be called to update the WME parameters in
1082          * the adapter at various places.  If we're already
1083          * associated then initiate the request immediately;
1084          * otherwise we assume the params will get sent down
1085          * to the adapter as part of the work iwi_auth_and_assoc
1086          * does.
1087          */
1088         if (vap->iv_state == IEEE80211_S_RUN) {
1089                 IWI_LOCK(sc);
1090                 iwi_wme_setparams(sc);
1091                 IWI_UNLOCK(sc);
1092         }
1093         return (0);
1094 }
1095
1096 static int
1097 iwi_wme_setie(struct iwi_softc *sc)
1098 {
1099         struct ieee80211_wme_info wme;
1100
1101         memset(&wme, 0, sizeof wme);
1102         wme.wme_id = IEEE80211_ELEMID_VENDOR;
1103         wme.wme_len = sizeof (struct ieee80211_wme_info) - 2;
1104         wme.wme_oui[0] = 0x00;
1105         wme.wme_oui[1] = 0x50;
1106         wme.wme_oui[2] = 0xf2;
1107         wme.wme_type = WME_OUI_TYPE;
1108         wme.wme_subtype = WME_INFO_OUI_SUBTYPE;
1109         wme.wme_version = WME_VERSION;
1110         wme.wme_info = 0;
1111
1112         DPRINTF(("Setting WME IE (len=%u)\n", wme.wme_len));
1113         return iwi_cmd(sc, IWI_CMD_SET_WMEIE, &wme, sizeof wme);
1114 }
1115
1116 /*
1117  * Read 16 bits at address 'addr' from the serial EEPROM.
1118  */
1119 static uint16_t
1120 iwi_read_prom_word(struct iwi_softc *sc, uint8_t addr)
1121 {
1122         uint32_t tmp;
1123         uint16_t val;
1124         int n;
1125
1126         /* clock C once before the first command */
1127         IWI_EEPROM_CTL(sc, 0);
1128         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1129         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1130         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1131
1132         /* write start bit (1) */
1133         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1134         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1135
1136         /* write READ opcode (10) */
1137         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1138         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1139         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1140         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1141
1142         /* write address A7-A0 */
1143         for (n = 7; n >= 0; n--) {
1144                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1145                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D));
1146                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1147                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D) | IWI_EEPROM_C);
1148         }
1149
1150         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1151
1152         /* read data Q15-Q0 */
1153         val = 0;
1154         for (n = 15; n >= 0; n--) {
1155                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1156                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1157                 tmp = MEM_READ_4(sc, IWI_MEM_EEPROM_CTL);
1158                 val |= ((tmp & IWI_EEPROM_Q) >> IWI_EEPROM_SHIFT_Q) << n;
1159         }
1160
1161         IWI_EEPROM_CTL(sc, 0);
1162
1163         /* clear Chip Select and clock C */
1164         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1165         IWI_EEPROM_CTL(sc, 0);
1166         IWI_EEPROM_CTL(sc, IWI_EEPROM_C);
1167
1168         return val;
1169 }
1170
1171 static void
1172 iwi_setcurchan(struct iwi_softc *sc, int chan)
1173 {
1174         struct ieee80211com *ic = &sc->sc_ic;
1175
1176         sc->curchan = chan;
1177         ieee80211_radiotap_chan_change(ic);
1178 }
1179
1180 static void
1181 iwi_frame_intr(struct iwi_softc *sc, struct iwi_rx_data *data, int i,
1182     struct iwi_frame *frame)
1183 {
1184         struct epoch_tracker et;
1185         struct ieee80211com *ic = &sc->sc_ic;
1186         struct mbuf *mnew, *m;
1187         struct ieee80211_node *ni;
1188         int type, error, framelen;
1189         int8_t rssi, nf;
1190         IWI_LOCK_DECL;
1191
1192         framelen = le16toh(frame->len);
1193         if (framelen < IEEE80211_MIN_LEN || framelen > MCLBYTES) {
1194                 /*
1195                  * XXX >MCLBYTES is bogus as it means the h/w dma'd
1196                  *     out of bounds; need to figure out how to limit
1197                  *     frame size in the firmware
1198                  */
1199                 /* XXX stat */
1200                 DPRINTFN(1,
1201                     ("drop rx frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1202                     le16toh(frame->len), frame->chan, frame->rssi,
1203                     frame->rssi_dbm));
1204                 return;
1205         }
1206
1207         DPRINTFN(5, ("received frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1208             le16toh(frame->len), frame->chan, frame->rssi, frame->rssi_dbm));
1209
1210         if (frame->chan != sc->curchan)
1211                 iwi_setcurchan(sc, frame->chan);
1212
1213         /*
1214          * Try to allocate a new mbuf for this ring element and load it before
1215          * processing the current mbuf. If the ring element cannot be loaded,
1216          * drop the received packet and reuse the old mbuf. In the unlikely
1217          * case that the old mbuf can't be reloaded either, explicitly panic.
1218          */
1219         mnew = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
1220         if (mnew == NULL) {
1221                 counter_u64_add(ic->ic_ierrors, 1);
1222                 return;
1223         }
1224
1225         bus_dmamap_unload(sc->rxq.data_dmat, data->map);
1226
1227         error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1228             mtod(mnew, void *), MCLBYTES, iwi_dma_map_addr, &data->physaddr,
1229             0);
1230         if (error != 0) {
1231                 m_freem(mnew);
1232
1233                 /* try to reload the old mbuf */
1234                 error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1235                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
1236                     &data->physaddr, 0);
1237                 if (error != 0) {
1238                         /* very unlikely that it will fail... */
1239                         panic("%s: could not load old rx mbuf",
1240                             device_get_name(sc->sc_dev));
1241                 }
1242                 counter_u64_add(ic->ic_ierrors, 1);
1243                 return;
1244         }
1245
1246         /*
1247          * New mbuf successfully loaded, update Rx ring and continue
1248          * processing.
1249          */
1250         m = data->m;
1251         data->m = mnew;
1252         CSR_WRITE_4(sc, data->reg, data->physaddr);
1253
1254         /* finalize mbuf */
1255         m->m_pkthdr.len = m->m_len = sizeof (struct iwi_hdr) +
1256             sizeof (struct iwi_frame) + framelen;
1257
1258         m_adj(m, sizeof (struct iwi_hdr) + sizeof (struct iwi_frame));
1259
1260         rssi = frame->rssi_dbm;
1261         nf = -95;
1262         if (ieee80211_radiotap_active(ic)) {
1263                 struct iwi_rx_radiotap_header *tap = &sc->sc_rxtap;
1264
1265                 tap->wr_flags = 0;
1266                 tap->wr_antsignal = rssi;
1267                 tap->wr_antnoise = nf;
1268                 tap->wr_rate = iwi_cvtrate(frame->rate);
1269                 tap->wr_antenna = frame->antenna;
1270         }
1271         IWI_UNLOCK(sc);
1272
1273         ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *));
1274         NET_EPOCH_ENTER(et);
1275         if (ni != NULL) {
1276                 type = ieee80211_input(ni, m, rssi, nf);
1277                 ieee80211_free_node(ni);
1278         } else
1279                 type = ieee80211_input_all(ic, m, rssi, nf);
1280         NET_EPOCH_EXIT(et);
1281
1282         IWI_LOCK(sc);
1283         if (sc->sc_softled) {
1284                 /*
1285                  * Blink for any data frame.  Otherwise do a
1286                  * heartbeat-style blink when idle.  The latter
1287                  * is mainly for station mode where we depend on
1288                  * periodic beacon frames to trigger the poll event.
1289                  */
1290                 if (type == IEEE80211_FC0_TYPE_DATA) {
1291                         sc->sc_rxrate = frame->rate;
1292                         iwi_led_event(sc, IWI_LED_RX);
1293                 } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle)
1294                         iwi_led_event(sc, IWI_LED_POLL);
1295         }
1296 }
1297
1298 /*
1299  * Check for an association response frame to see if QoS
1300  * has been negotiated.  We parse just enough to figure
1301  * out if we're supposed to use QoS.  The proper solution
1302  * is to pass the frame up so ieee80211_input can do the
1303  * work but that's made hard by how things currently are
1304  * done in the driver.
1305  */
1306 static void
1307 iwi_checkforqos(struct ieee80211vap *vap,
1308         const struct ieee80211_frame *wh, int len)
1309 {
1310 #define SUBTYPE(wh)     ((wh)->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
1311         const uint8_t *frm, *efrm, *wme;
1312         struct ieee80211_node *ni;
1313         uint16_t capinfo, status, associd;
1314
1315         /* NB: +8 for capinfo, status, associd, and first ie */
1316         if (!(sizeof(*wh)+8 < len && len < IEEE80211_MAX_LEN) ||
1317             SUBTYPE(wh) != IEEE80211_FC0_SUBTYPE_ASSOC_RESP)
1318                 return;
1319         /*
1320          * asresp frame format
1321          *      [2] capability information
1322          *      [2] status
1323          *      [2] association ID
1324          *      [tlv] supported rates
1325          *      [tlv] extended supported rates
1326          *      [tlv] WME
1327          */
1328         frm = (const uint8_t *)&wh[1];
1329         efrm = ((const uint8_t *) wh) + len;
1330
1331         capinfo = le16toh(*(const uint16_t *)frm);
1332         frm += 2;
1333         status = le16toh(*(const uint16_t *)frm);
1334         frm += 2;
1335         associd = le16toh(*(const uint16_t *)frm);
1336         frm += 2;
1337
1338         wme = NULL;
1339         while (efrm - frm > 1) {
1340                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1341                 switch (*frm) {
1342                 case IEEE80211_ELEMID_VENDOR:
1343                         if (iswmeoui(frm))
1344                                 wme = frm;
1345                         break;
1346                 }
1347                 frm += frm[1] + 2;
1348         }
1349
1350         ni = ieee80211_ref_node(vap->iv_bss);
1351         ni->ni_capinfo = capinfo;
1352         ni->ni_associd = associd & 0x3fff;
1353         if (wme != NULL)
1354                 ni->ni_flags |= IEEE80211_NODE_QOS;
1355         else
1356                 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1357         ieee80211_free_node(ni);
1358 #undef SUBTYPE
1359 }
1360
1361 static void
1362 iwi_notif_link_quality(struct iwi_softc *sc, struct iwi_notif *notif)
1363 {
1364         struct iwi_notif_link_quality *lq;
1365         int len;
1366
1367         len = le16toh(notif->len);
1368
1369         DPRINTFN(5, ("Notification (%u) - len=%d, sizeof=%zu\n",
1370             notif->type,
1371             len,
1372             sizeof(struct iwi_notif_link_quality)
1373             ));
1374
1375         /* enforce length */
1376         if (len != sizeof(struct iwi_notif_link_quality)) {
1377                 DPRINTFN(5, ("Notification: (%u) too short (%d)\n",
1378                     notif->type,
1379                     len));
1380                 return;
1381         }
1382
1383         lq = (struct iwi_notif_link_quality *)(notif + 1);
1384         memcpy(&sc->sc_linkqual, lq, sizeof(sc->sc_linkqual));
1385         sc->sc_linkqual_valid = 1;
1386 }
1387
1388 /*
1389  * Task queue callbacks for iwi_notification_intr used to avoid LOR's.
1390  */
1391
1392 static void
1393 iwi_notification_intr(struct iwi_softc *sc, struct iwi_notif *notif)
1394 {
1395         struct ieee80211com *ic = &sc->sc_ic;
1396         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1397         struct iwi_notif_scan_channel *chan;
1398         struct iwi_notif_scan_complete *scan;
1399         struct iwi_notif_authentication *auth;
1400         struct iwi_notif_association *assoc;
1401         struct iwi_notif_beacon_state *beacon;
1402
1403         switch (notif->type) {
1404         case IWI_NOTIF_TYPE_SCAN_CHANNEL:
1405                 chan = (struct iwi_notif_scan_channel *)(notif + 1);
1406
1407                 DPRINTFN(3, ("Scan of channel %u complete (%u)\n",
1408                     ieee80211_ieee2mhz(chan->nchan, 0), chan->nchan));
1409
1410                 /* Reset the timer, the scan is still going */
1411                 sc->sc_state_timer = 3;
1412                 break;
1413
1414         case IWI_NOTIF_TYPE_SCAN_COMPLETE:
1415                 scan = (struct iwi_notif_scan_complete *)(notif + 1);
1416
1417                 DPRINTFN(2, ("Scan completed (%u, %u)\n", scan->nchan,
1418                     scan->status));
1419
1420                 IWI_STATE_END(sc, IWI_FW_SCANNING);
1421
1422                 /*
1423                  * Monitor mode works by doing a passive scan to set
1424                  * the channel and enable rx.  Because we don't want
1425                  * to abort a scan lest the firmware crash we scan
1426                  * for a short period of time and automatically restart
1427                  * the scan when notified the sweep has completed.
1428                  */
1429                 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
1430                         ieee80211_runtask(ic, &sc->sc_monitortask);
1431                         break;
1432                 }
1433
1434                 if (scan->status == IWI_SCAN_COMPLETED) {
1435                         /* NB: don't need to defer, net80211 does it for us */
1436                         ieee80211_scan_next(vap);
1437                 }
1438                 break;
1439
1440         case IWI_NOTIF_TYPE_AUTHENTICATION:
1441                 auth = (struct iwi_notif_authentication *)(notif + 1);
1442                 switch (auth->state) {
1443                 case IWI_AUTH_SUCCESS:
1444                         DPRINTFN(2, ("Authentication succeeeded\n"));
1445                         ieee80211_new_state(vap, IEEE80211_S_ASSOC, -1);
1446                         break;
1447                 case IWI_AUTH_FAIL:
1448                         /*
1449                          * These are delivered as an unsolicited deauth
1450                          * (e.g. due to inactivity) or in response to an
1451                          * associate request.
1452                          */
1453                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1454                         if (vap->iv_state != IEEE80211_S_RUN) {
1455                                 DPRINTFN(2, ("Authentication failed\n"));
1456                                 vap->iv_stats.is_rx_auth_fail++;
1457                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1458                         } else {
1459                                 DPRINTFN(2, ("Deauthenticated\n"));
1460                                 vap->iv_stats.is_rx_deauth++;
1461                         }
1462                         ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1463                         break;
1464                 case IWI_AUTH_SENT_1:
1465                 case IWI_AUTH_RECV_2:
1466                 case IWI_AUTH_SEQ1_PASS:
1467                         break;
1468                 case IWI_AUTH_SEQ1_FAIL:
1469                         DPRINTFN(2, ("Initial authentication handshake failed; "
1470                                 "you probably need shared key\n"));
1471                         vap->iv_stats.is_rx_auth_fail++;
1472                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1473                         /* XXX retry shared key when in auto */
1474                         break;
1475                 default:
1476                         device_printf(sc->sc_dev,
1477                             "unknown authentication state %u\n", auth->state);
1478                         break;
1479                 }
1480                 break;
1481
1482         case IWI_NOTIF_TYPE_ASSOCIATION:
1483                 assoc = (struct iwi_notif_association *)(notif + 1);
1484                 switch (assoc->state) {
1485                 case IWI_AUTH_SUCCESS:
1486                         /* re-association, do nothing */
1487                         break;
1488                 case IWI_ASSOC_SUCCESS:
1489                         DPRINTFN(2, ("Association succeeded\n"));
1490                         sc->flags |= IWI_FLAG_ASSOCIATED;
1491                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1492                         iwi_checkforqos(vap,
1493                             (const struct ieee80211_frame *)(assoc+1),
1494                             le16toh(notif->len) - sizeof(*assoc) - 1);
1495                         ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
1496                         break;
1497                 case IWI_ASSOC_INIT:
1498                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1499                         switch (sc->fw_state) {
1500                         case IWI_FW_ASSOCIATING:
1501                                 DPRINTFN(2, ("Association failed\n"));
1502                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1503                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1504                                 break;
1505
1506                         case IWI_FW_DISASSOCIATING:
1507                                 DPRINTFN(2, ("Dissassociated\n"));
1508                                 IWI_STATE_END(sc, IWI_FW_DISASSOCIATING);
1509                                 vap->iv_stats.is_rx_disassoc++;
1510                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1511                                 break;
1512                         }
1513                         break;
1514                 default:
1515                         device_printf(sc->sc_dev,
1516                             "unknown association state %u\n", assoc->state);
1517                         break;
1518                 }
1519                 break;
1520
1521         case IWI_NOTIF_TYPE_BEACON:
1522                 /* XXX check struct length */
1523                 beacon = (struct iwi_notif_beacon_state *)(notif + 1);
1524
1525                 DPRINTFN(5, ("Beacon state (%u, %u)\n",
1526                     beacon->state, le32toh(beacon->number)));
1527
1528                 if (beacon->state == IWI_BEACON_MISS) {
1529                         /*
1530                          * The firmware notifies us of every beacon miss
1531                          * so we need to track the count against the
1532                          * configured threshold before notifying the
1533                          * 802.11 layer.
1534                          * XXX try to roam, drop assoc only on much higher count
1535                          */
1536                         if (le32toh(beacon->number) >= vap->iv_bmissthreshold) {
1537                                 DPRINTF(("Beacon miss: %u >= %u\n",
1538                                     le32toh(beacon->number),
1539                                     vap->iv_bmissthreshold));
1540                                 vap->iv_stats.is_beacon_miss++;
1541                                 /*
1542                                  * It's pointless to notify the 802.11 layer
1543                                  * as it'll try to send a probe request (which
1544                                  * we'll discard) and then timeout and drop us
1545                                  * into scan state.  Instead tell the firmware
1546                                  * to disassociate and then on completion we'll
1547                                  * kick the state machine to scan.
1548                                  */
1549                                 ieee80211_runtask(ic, &sc->sc_disassoctask);
1550                         }
1551                 }
1552                 break;
1553
1554         case IWI_NOTIF_TYPE_CALIBRATION:
1555         case IWI_NOTIF_TYPE_NOISE:
1556                 /* XXX handle? */
1557                 DPRINTFN(5, ("Notification (%u)\n", notif->type));
1558                 break;
1559         case IWI_NOTIF_TYPE_LINK_QUALITY:
1560                 iwi_notif_link_quality(sc, notif);
1561                 break;
1562
1563         default:
1564                 DPRINTF(("unknown notification type %u flags 0x%x len %u\n",
1565                     notif->type, notif->flags, le16toh(notif->len)));
1566                 break;
1567         }
1568 }
1569
1570 static void
1571 iwi_rx_intr(struct iwi_softc *sc)
1572 {
1573         struct iwi_rx_data *data;
1574         struct iwi_hdr *hdr;
1575         uint32_t hw;
1576
1577         hw = CSR_READ_4(sc, IWI_CSR_RX_RIDX);
1578
1579         for (; sc->rxq.cur != hw;) {
1580                 data = &sc->rxq.data[sc->rxq.cur];
1581
1582                 bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1583                     BUS_DMASYNC_POSTREAD);
1584
1585                 hdr = mtod(data->m, struct iwi_hdr *);
1586
1587                 switch (hdr->type) {
1588                 case IWI_HDR_TYPE_FRAME:
1589                         iwi_frame_intr(sc, data, sc->rxq.cur,
1590                             (struct iwi_frame *)(hdr + 1));
1591                         break;
1592
1593                 case IWI_HDR_TYPE_NOTIF:
1594                         iwi_notification_intr(sc,
1595                             (struct iwi_notif *)(hdr + 1));
1596                         break;
1597
1598                 default:
1599                         device_printf(sc->sc_dev, "unknown hdr type %u\n",
1600                             hdr->type);
1601                 }
1602
1603                 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur));
1604
1605                 sc->rxq.cur = (sc->rxq.cur + 1) % IWI_RX_RING_COUNT;
1606         }
1607
1608         /* tell the firmware what we have processed */
1609         hw = (hw == 0) ? IWI_RX_RING_COUNT - 1 : hw - 1;
1610         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, hw);
1611 }
1612
1613 static void
1614 iwi_tx_intr(struct iwi_softc *sc, struct iwi_tx_ring *txq)
1615 {
1616         struct iwi_tx_data *data;
1617         uint32_t hw;
1618
1619         hw = CSR_READ_4(sc, txq->csr_ridx);
1620
1621         while (txq->next != hw) {
1622                 data = &txq->data[txq->next];
1623                 DPRINTFN(15, ("tx done idx=%u\n", txq->next));
1624                 bus_dmamap_sync(txq->data_dmat, data->map,
1625                     BUS_DMASYNC_POSTWRITE);
1626                 bus_dmamap_unload(txq->data_dmat, data->map);
1627                 ieee80211_tx_complete(data->ni, data->m, 0);
1628                 data->ni = NULL;
1629                 data->m = NULL;
1630                 txq->queued--;
1631                 txq->next = (txq->next + 1) % IWI_TX_RING_COUNT;
1632         }
1633         sc->sc_tx_timer = 0;
1634         if (sc->sc_softled)
1635                 iwi_led_event(sc, IWI_LED_TX);
1636         iwi_start(sc);
1637 }
1638
1639 static void
1640 iwi_fatal_error_intr(struct iwi_softc *sc)
1641 {
1642         struct ieee80211com *ic = &sc->sc_ic;
1643         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1644
1645         device_printf(sc->sc_dev, "firmware error\n");
1646         if (vap != NULL)
1647                 ieee80211_cancel_scan(vap);
1648         ieee80211_runtask(ic, &sc->sc_restarttask);
1649
1650         sc->flags &= ~IWI_FLAG_BUSY;
1651         sc->sc_busy_timer = 0;
1652         wakeup(sc);
1653 }
1654
1655 static void
1656 iwi_radio_off_intr(struct iwi_softc *sc)
1657 {
1658
1659         ieee80211_runtask(&sc->sc_ic, &sc->sc_radiofftask);
1660 }
1661
1662 static void
1663 iwi_intr(void *arg)
1664 {
1665         struct iwi_softc *sc = arg;
1666         uint32_t r;
1667         IWI_LOCK_DECL;
1668
1669         IWI_LOCK(sc);
1670
1671         if ((r = CSR_READ_4(sc, IWI_CSR_INTR)) == 0 || r == 0xffffffff) {
1672                 IWI_UNLOCK(sc);
1673                 return;
1674         }
1675
1676         /* acknowledge interrupts */
1677         CSR_WRITE_4(sc, IWI_CSR_INTR, r);
1678
1679         if (r & IWI_INTR_FATAL_ERROR) {
1680                 iwi_fatal_error_intr(sc);
1681                 goto done;
1682         }
1683
1684         if (r & IWI_INTR_FW_INITED) {
1685                 if (!(r & (IWI_INTR_FATAL_ERROR | IWI_INTR_PARITY_ERROR)))
1686                         wakeup(sc);
1687         }
1688
1689         if (r & IWI_INTR_RADIO_OFF)
1690                 iwi_radio_off_intr(sc);
1691
1692         if (r & IWI_INTR_CMD_DONE) {
1693                 sc->flags &= ~IWI_FLAG_BUSY;
1694                 sc->sc_busy_timer = 0;
1695                 wakeup(sc);
1696         }
1697
1698         if (r & IWI_INTR_TX1_DONE)
1699                 iwi_tx_intr(sc, &sc->txq[0]);
1700
1701         if (r & IWI_INTR_TX2_DONE)
1702                 iwi_tx_intr(sc, &sc->txq[1]);
1703
1704         if (r & IWI_INTR_TX3_DONE)
1705                 iwi_tx_intr(sc, &sc->txq[2]);
1706
1707         if (r & IWI_INTR_TX4_DONE)
1708                 iwi_tx_intr(sc, &sc->txq[3]);
1709
1710         if (r & IWI_INTR_RX_DONE)
1711                 iwi_rx_intr(sc);
1712
1713         if (r & IWI_INTR_PARITY_ERROR) {
1714                 /* XXX rate-limit */
1715                 device_printf(sc->sc_dev, "parity error\n");
1716         }
1717 done:
1718         IWI_UNLOCK(sc);
1719 }
1720
1721 static int
1722 iwi_cmd(struct iwi_softc *sc, uint8_t type, void *data, uint8_t len)
1723 {
1724         struct iwi_cmd_desc *desc;
1725
1726         IWI_LOCK_ASSERT(sc);
1727
1728         if (sc->flags & IWI_FLAG_BUSY) {
1729                 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n",
1730                         __func__, type);
1731                 return EAGAIN;
1732         }
1733         sc->flags |= IWI_FLAG_BUSY;
1734         sc->sc_busy_timer = 2;
1735
1736         desc = &sc->cmdq.desc[sc->cmdq.cur];
1737
1738         desc->hdr.type = IWI_HDR_TYPE_COMMAND;
1739         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1740         desc->type = type;
1741         desc->len = len;
1742         memcpy(desc->data, data, len);
1743
1744         bus_dmamap_sync(sc->cmdq.desc_dmat, sc->cmdq.desc_map,
1745             BUS_DMASYNC_PREWRITE);
1746
1747         DPRINTFN(2, ("sending command idx=%u type=%u len=%u\n", sc->cmdq.cur,
1748             type, len));
1749
1750         sc->cmdq.cur = (sc->cmdq.cur + 1) % IWI_CMD_RING_COUNT;
1751         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
1752
1753         return msleep(sc, &sc->sc_mtx, 0, "iwicmd", hz);
1754 }
1755
1756 static void
1757 iwi_write_ibssnode(struct iwi_softc *sc,
1758         const u_int8_t addr[IEEE80211_ADDR_LEN], int entry)
1759 {
1760         struct iwi_ibssnode node;
1761
1762         /* write node information into NIC memory */
1763         memset(&node, 0, sizeof node);
1764         IEEE80211_ADDR_COPY(node.bssid, addr);
1765
1766         DPRINTF(("%s mac %6D station %u\n", __func__, node.bssid, ":", entry));
1767
1768         CSR_WRITE_REGION_1(sc,
1769             IWI_CSR_NODE_BASE + entry * sizeof node,
1770             (uint8_t *)&node, sizeof node);
1771 }
1772
1773 static int
1774 iwi_tx_start(struct iwi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni,
1775     int ac)
1776 {
1777         struct ieee80211vap *vap = ni->ni_vap;
1778         struct iwi_node *in = (struct iwi_node *)ni;
1779         const struct ieee80211_frame *wh;
1780         struct ieee80211_key *k;
1781         struct iwi_tx_ring *txq = &sc->txq[ac];
1782         struct iwi_tx_data *data;
1783         struct iwi_tx_desc *desc;
1784         struct mbuf *mnew;
1785         bus_dma_segment_t segs[IWI_MAX_NSEG];
1786         int error, nsegs, hdrlen, i;
1787         int ismcast, flags, xflags, staid;
1788
1789         IWI_LOCK_ASSERT(sc);
1790         wh = mtod(m0, const struct ieee80211_frame *);
1791         /* NB: only data frames use this path */
1792         hdrlen = ieee80211_hdrsize(wh);
1793         ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1794         flags = xflags = 0;
1795
1796         if (!ismcast)
1797                 flags |= IWI_DATA_FLAG_NEED_ACK;
1798         if (vap->iv_flags & IEEE80211_F_SHPREAMBLE)
1799                 flags |= IWI_DATA_FLAG_SHPREAMBLE;
1800         if (IEEE80211_QOS_HAS_SEQ(wh)) {
1801                 xflags |= IWI_DATA_XFLAG_QOS;
1802                 if (ieee80211_wme_vap_ac_is_noack(vap, ac))
1803                         flags &= ~IWI_DATA_FLAG_NEED_ACK;
1804         }
1805
1806         /*
1807          * This is only used in IBSS mode where the firmware expect an index
1808          * in a h/w table instead of a destination address.
1809          */
1810         if (vap->iv_opmode == IEEE80211_M_IBSS) {
1811                 if (!ismcast) {
1812                         if (in->in_station == -1) {
1813                                 in->in_station = alloc_unr(sc->sc_unr);
1814                                 if (in->in_station == -1) {
1815                                         /* h/w table is full */
1816                                         if_inc_counter(ni->ni_vap->iv_ifp,
1817                                             IFCOUNTER_OERRORS, 1);
1818                                         m_freem(m0);
1819                                         ieee80211_free_node(ni);
1820                                         return 0;
1821                                 }
1822                                 iwi_write_ibssnode(sc,
1823                                         ni->ni_macaddr, in->in_station);
1824                         }
1825                         staid = in->in_station;
1826                 } else {
1827                         /*
1828                          * Multicast addresses have no associated node
1829                          * so there will be no station entry.  We reserve
1830                          * entry 0 for one mcast address and use that.
1831                          * If there are many being used this will be
1832                          * expensive and we'll need to do a better job
1833                          * but for now this handles the broadcast case.
1834                          */
1835                         if (!IEEE80211_ADDR_EQ(wh->i_addr1, sc->sc_mcast)) {
1836                                 IEEE80211_ADDR_COPY(sc->sc_mcast, wh->i_addr1);
1837                                 iwi_write_ibssnode(sc, sc->sc_mcast, 0);
1838                         }
1839                         staid = 0;
1840                 }
1841         } else
1842                 staid = 0;
1843
1844         if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1845                 k = ieee80211_crypto_encap(ni, m0);
1846                 if (k == NULL) {
1847                         m_freem(m0);
1848                         return ENOBUFS;
1849                 }
1850
1851                 /* packet header may have moved, reset our local pointer */
1852                 wh = mtod(m0, struct ieee80211_frame *);
1853         }
1854
1855         if (ieee80211_radiotap_active_vap(vap)) {
1856                 struct iwi_tx_radiotap_header *tap = &sc->sc_txtap;
1857
1858                 tap->wt_flags = 0;
1859
1860                 ieee80211_radiotap_tx(vap, m0);
1861         }
1862
1863         data = &txq->data[txq->cur];
1864         desc = &txq->desc[txq->cur];
1865
1866         /* save and trim IEEE802.11 header */
1867         m_copydata(m0, 0, hdrlen, (caddr_t)&desc->wh);
1868         m_adj(m0, hdrlen);
1869
1870         error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, segs,
1871             &nsegs, 0);
1872         if (error != 0 && error != EFBIG) {
1873                 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1874                     error);
1875                 m_freem(m0);
1876                 return error;
1877         }
1878         if (error != 0) {
1879                 mnew = m_defrag(m0, M_NOWAIT);
1880                 if (mnew == NULL) {
1881                         device_printf(sc->sc_dev,
1882                             "could not defragment mbuf\n");
1883                         m_freem(m0);
1884                         return ENOBUFS;
1885                 }
1886                 m0 = mnew;
1887
1888                 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map,
1889                     m0, segs, &nsegs, 0);
1890                 if (error != 0) {
1891                         device_printf(sc->sc_dev,
1892                             "could not map mbuf (error %d)\n", error);
1893                         m_freem(m0);
1894                         return error;
1895                 }
1896         }
1897
1898         data->m = m0;
1899         data->ni = ni;
1900
1901         desc->hdr.type = IWI_HDR_TYPE_DATA;
1902         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1903         desc->station = staid;
1904         desc->cmd = IWI_DATA_CMD_TX;
1905         desc->len = htole16(m0->m_pkthdr.len);
1906         desc->flags = flags;
1907         desc->xflags = xflags;
1908
1909 #if 0
1910         if (vap->iv_flags & IEEE80211_F_PRIVACY)
1911                 desc->wep_txkey = vap->iv_def_txkey;
1912         else
1913 #endif
1914                 desc->flags |= IWI_DATA_FLAG_NO_WEP;
1915
1916         desc->nseg = htole32(nsegs);
1917         for (i = 0; i < nsegs; i++) {
1918                 desc->seg_addr[i] = htole32(segs[i].ds_addr);
1919                 desc->seg_len[i]  = htole16(segs[i].ds_len);
1920         }
1921
1922         bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1923         bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE);
1924
1925         DPRINTFN(5, ("sending data frame txq=%u idx=%u len=%u nseg=%u\n",
1926             ac, txq->cur, le16toh(desc->len), nsegs));
1927
1928         txq->queued++;
1929         txq->cur = (txq->cur + 1) % IWI_TX_RING_COUNT;
1930         CSR_WRITE_4(sc, txq->csr_widx, txq->cur);
1931
1932         return 0;
1933 }
1934
1935 static int
1936 iwi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
1937         const struct ieee80211_bpf_params *params)
1938 {
1939         /* no support; just discard */
1940         m_freem(m);
1941         ieee80211_free_node(ni);
1942         return 0;
1943 }
1944
1945 static int
1946 iwi_transmit(struct ieee80211com *ic, struct mbuf *m)
1947 {
1948         struct iwi_softc *sc = ic->ic_softc;
1949         int error;
1950         IWI_LOCK_DECL;
1951
1952         IWI_LOCK(sc);
1953         if (!sc->sc_running) {
1954                 IWI_UNLOCK(sc);
1955                 return (ENXIO);
1956         }
1957         error = mbufq_enqueue(&sc->sc_snd, m);
1958         if (error) {
1959                 IWI_UNLOCK(sc);
1960                 return (error);
1961         }
1962         iwi_start(sc);
1963         IWI_UNLOCK(sc);
1964         return (0);
1965 }
1966
1967 static void
1968 iwi_start(struct iwi_softc *sc)
1969 {
1970         struct mbuf *m;
1971         struct ieee80211_node *ni;
1972         int ac;
1973
1974         IWI_LOCK_ASSERT(sc);
1975
1976         while ((m =  mbufq_dequeue(&sc->sc_snd)) != NULL) {
1977                 ac = M_WME_GETAC(m);
1978                 if (sc->txq[ac].queued > IWI_TX_RING_COUNT - 8) {
1979                         /* there is no place left in this ring; tail drop */
1980                         /* XXX tail drop */
1981                         mbufq_prepend(&sc->sc_snd, m);
1982                         break;
1983                 }
1984                 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
1985                 if (iwi_tx_start(sc, m, ni, ac) != 0) {
1986                         if_inc_counter(ni->ni_vap->iv_ifp,
1987                             IFCOUNTER_OERRORS, 1);
1988                         ieee80211_free_node(ni);
1989                         break;
1990                 }
1991                 sc->sc_tx_timer = 5;
1992         }
1993 }
1994
1995 static void
1996 iwi_watchdog(void *arg)
1997 {
1998         struct iwi_softc *sc = arg;
1999         struct ieee80211com *ic = &sc->sc_ic;
2000
2001         IWI_LOCK_ASSERT(sc);
2002
2003         if (sc->sc_tx_timer > 0) {
2004                 if (--sc->sc_tx_timer == 0) {
2005                         device_printf(sc->sc_dev, "device timeout\n");
2006                         counter_u64_add(ic->ic_oerrors, 1);
2007                         ieee80211_runtask(ic, &sc->sc_restarttask);
2008                 }
2009         }
2010         if (sc->sc_state_timer > 0) {
2011                 if (--sc->sc_state_timer == 0) {
2012                         device_printf(sc->sc_dev,
2013                             "firmware stuck in state %d, resetting\n",
2014                             sc->fw_state);
2015                         if (sc->fw_state == IWI_FW_SCANNING)
2016                                 ieee80211_cancel_scan(TAILQ_FIRST(&ic->ic_vaps));
2017                         ieee80211_runtask(ic, &sc->sc_restarttask);
2018                         sc->sc_state_timer = 3;
2019                 }
2020         }
2021         if (sc->sc_busy_timer > 0) {
2022                 if (--sc->sc_busy_timer == 0) {
2023                         device_printf(sc->sc_dev,
2024                             "firmware command timeout, resetting\n");
2025                         ieee80211_runtask(ic, &sc->sc_restarttask);
2026                 }
2027         }
2028         callout_reset(&sc->sc_wdtimer, hz, iwi_watchdog, sc);
2029 }
2030
2031 static void
2032 iwi_parent(struct ieee80211com *ic)
2033 {
2034         struct iwi_softc *sc = ic->ic_softc;
2035         int startall = 0;
2036         IWI_LOCK_DECL;
2037
2038         IWI_LOCK(sc);
2039         if (ic->ic_nrunning > 0) {
2040                 if (!sc->sc_running) {
2041                         iwi_init_locked(sc);
2042                         startall = 1;
2043                 }
2044         } else if (sc->sc_running)
2045                 iwi_stop_locked(sc);
2046         IWI_UNLOCK(sc);
2047         if (startall)
2048                 ieee80211_start_all(ic);
2049 }
2050
2051 static int
2052 iwi_ioctl(struct ieee80211com *ic, u_long cmd, void *data)
2053 {
2054         struct ifreq *ifr = data;
2055         struct iwi_softc *sc = ic->ic_softc;
2056         int error;
2057         IWI_LOCK_DECL;
2058
2059         IWI_LOCK(sc);
2060         switch (cmd) {
2061         case SIOCGIWISTATS:
2062                 /* XXX validate permissions/memory/etc? */
2063                 error = copyout(&sc->sc_linkqual, ifr_data_get_ptr(ifr),
2064                     sizeof(struct iwi_notif_link_quality));
2065                 break;
2066         case SIOCZIWISTATS:
2067                 memset(&sc->sc_linkqual, 0,
2068                     sizeof(struct iwi_notif_link_quality));
2069                 error = 0;
2070                 break;
2071         default:
2072                 error = ENOTTY;
2073                 break;
2074         }
2075         IWI_UNLOCK(sc);
2076
2077         return (error);
2078 }
2079
2080 static void
2081 iwi_stop_master(struct iwi_softc *sc)
2082 {
2083         uint32_t tmp;
2084         int ntries;
2085
2086         /* disable interrupts */
2087         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, 0);
2088
2089         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_STOP_MASTER);
2090         for (ntries = 0; ntries < 5; ntries++) {
2091                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2092                         break;
2093                 DELAY(10);
2094         }
2095         if (ntries == 5)
2096                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2097
2098         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2099         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_PRINCETON_RESET);
2100
2101         sc->flags &= ~IWI_FLAG_FW_INITED;
2102 }
2103
2104 static int
2105 iwi_reset(struct iwi_softc *sc)
2106 {
2107         uint32_t tmp;
2108         int i, ntries;
2109
2110         iwi_stop_master(sc);
2111
2112         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2113         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2114
2115         CSR_WRITE_4(sc, IWI_CSR_READ_INT, IWI_READ_INT_INIT_HOST);
2116
2117         /* wait for clock stabilization */
2118         for (ntries = 0; ntries < 1000; ntries++) {
2119                 if (CSR_READ_4(sc, IWI_CSR_CTL) & IWI_CTL_CLOCK_READY)
2120                         break;
2121                 DELAY(200);
2122         }
2123         if (ntries == 1000) {
2124                 device_printf(sc->sc_dev,
2125                     "timeout waiting for clock stabilization\n");
2126                 return EIO;
2127         }
2128
2129         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2130         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_SOFT_RESET);
2131
2132         DELAY(10);
2133
2134         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2135         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2136
2137         /* clear NIC memory */
2138         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0);
2139         for (i = 0; i < 0xc000; i++)
2140                 CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2141
2142         return 0;
2143 }
2144
2145 static const struct iwi_firmware_ohdr *
2146 iwi_setup_ofw(struct iwi_softc *sc, struct iwi_fw *fw)
2147 {
2148         const struct firmware *fp = fw->fp;
2149         const struct iwi_firmware_ohdr *hdr;
2150
2151         if (fp->datasize < sizeof (struct iwi_firmware_ohdr)) {
2152                 device_printf(sc->sc_dev, "image '%s' too small\n", fp->name);
2153                 return NULL;
2154         }
2155         hdr = (const struct iwi_firmware_ohdr *)fp->data;
2156         if ((IWI_FW_GET_MAJOR(le32toh(hdr->version)) != IWI_FW_REQ_MAJOR) ||
2157             (IWI_FW_GET_MINOR(le32toh(hdr->version)) != IWI_FW_REQ_MINOR)) {
2158                 device_printf(sc->sc_dev, "version for '%s' %d.%d != %d.%d\n",
2159                     fp->name, IWI_FW_GET_MAJOR(le32toh(hdr->version)),
2160                     IWI_FW_GET_MINOR(le32toh(hdr->version)), IWI_FW_REQ_MAJOR,
2161                     IWI_FW_REQ_MINOR);
2162                 return NULL;
2163         }
2164         fw->data = ((const char *) fp->data) + sizeof(struct iwi_firmware_ohdr);
2165         fw->size = fp->datasize - sizeof(struct iwi_firmware_ohdr);
2166         fw->name = fp->name;
2167         return hdr;
2168 }
2169
2170 static const struct iwi_firmware_ohdr *
2171 iwi_setup_oucode(struct iwi_softc *sc, struct iwi_fw *fw)
2172 {
2173         const struct iwi_firmware_ohdr *hdr;
2174
2175         hdr = iwi_setup_ofw(sc, fw);
2176         if (hdr != NULL && le32toh(hdr->mode) != IWI_FW_MODE_UCODE) {
2177                 device_printf(sc->sc_dev, "%s is not a ucode image\n",
2178                     fw->name);
2179                 hdr = NULL;
2180         }
2181         return hdr;
2182 }
2183
2184 static void
2185 iwi_getfw(struct iwi_fw *fw, const char *fwname,
2186           struct iwi_fw *uc, const char *ucname)
2187 {
2188         if (fw->fp == NULL)
2189                 fw->fp = firmware_get(fwname);
2190         /* NB: pre-3.0 ucode is packaged separately */
2191         if (uc->fp == NULL && fw->fp != NULL && fw->fp->version < 300)
2192                 uc->fp = firmware_get(ucname);
2193 }
2194
2195 /*
2196  * Get the required firmware images if not already loaded.
2197  * Note that we hold firmware images so long as the device
2198  * is marked up in case we need to reload them on device init.
2199  * This is necessary because we re-init the device sometimes
2200  * from a context where we cannot read from the filesystem
2201  * (e.g. from the taskqueue thread when rfkill is re-enabled).
2202  * XXX return 0 on success, 1 on error.
2203  *
2204  * NB: the order of get'ing and put'ing images here is
2205  * intentional to support handling firmware images bundled
2206  * by operating mode and/or all together in one file with
2207  * the boot firmware as "master".
2208  */
2209 static int
2210 iwi_get_firmware(struct iwi_softc *sc, enum ieee80211_opmode opmode)
2211 {
2212         const struct iwi_firmware_hdr *hdr;
2213         const struct firmware *fp;
2214
2215         /* invalidate cached firmware on mode change */
2216         if (sc->fw_mode != opmode)
2217                 iwi_put_firmware(sc);
2218
2219         switch (opmode) {
2220         case IEEE80211_M_STA:
2221                 iwi_getfw(&sc->fw_fw, "iwi_bss", &sc->fw_uc, "iwi_ucode_bss");
2222                 break;
2223         case IEEE80211_M_IBSS:
2224                 iwi_getfw(&sc->fw_fw, "iwi_ibss", &sc->fw_uc, "iwi_ucode_ibss");
2225                 break;
2226         case IEEE80211_M_MONITOR:
2227                 iwi_getfw(&sc->fw_fw, "iwi_monitor",
2228                           &sc->fw_uc, "iwi_ucode_monitor");
2229                 break;
2230         default:
2231                 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode);
2232                 return EINVAL;
2233         }
2234         fp = sc->fw_fw.fp;
2235         if (fp == NULL) {
2236                 device_printf(sc->sc_dev, "could not load firmware\n");
2237                 goto bad;
2238         }
2239         if (fp->version < 300) {
2240                 /*
2241                  * Firmware prior to 3.0 was packaged as separate
2242                  * boot, firmware, and ucode images.  Verify the
2243                  * ucode image was read in, retrieve the boot image
2244                  * if needed, and check version stamps for consistency.
2245                  * The version stamps in the data are also checked
2246                  * above; this is a bit paranoid but is a cheap
2247                  * safeguard against mis-packaging.
2248                  */
2249                 if (sc->fw_uc.fp == NULL) {
2250                         device_printf(sc->sc_dev, "could not load ucode\n");
2251                         goto bad;
2252                 }
2253                 if (sc->fw_boot.fp == NULL) {
2254                         sc->fw_boot.fp = firmware_get("iwi_boot");
2255                         if (sc->fw_boot.fp == NULL) {
2256                                 device_printf(sc->sc_dev,
2257                                         "could not load boot firmware\n");
2258                                 goto bad;
2259                         }
2260                 }
2261                 if (sc->fw_boot.fp->version != sc->fw_fw.fp->version ||
2262                     sc->fw_boot.fp->version != sc->fw_uc.fp->version) {
2263                         device_printf(sc->sc_dev,
2264                             "firmware version mismatch: "
2265                             "'%s' is %d, '%s' is %d, '%s' is %d\n",
2266                             sc->fw_boot.fp->name, sc->fw_boot.fp->version,
2267                             sc->fw_uc.fp->name, sc->fw_uc.fp->version,
2268                             sc->fw_fw.fp->name, sc->fw_fw.fp->version
2269                         );
2270                         goto bad;
2271                 }
2272                 /*
2273                  * Check and setup each image.
2274                  */
2275                 if (iwi_setup_oucode(sc, &sc->fw_uc) == NULL ||
2276                     iwi_setup_ofw(sc, &sc->fw_boot) == NULL ||
2277                     iwi_setup_ofw(sc, &sc->fw_fw) == NULL)
2278                         goto bad;
2279         } else {
2280                 /*
2281                  * Check and setup combined image.
2282                  */
2283                 if (fp->datasize < sizeof(struct iwi_firmware_hdr)) {
2284                         device_printf(sc->sc_dev, "image '%s' too small\n",
2285                             fp->name);
2286                         goto bad;
2287                 }
2288                 hdr = (const struct iwi_firmware_hdr *)fp->data;
2289                 if (fp->datasize < sizeof(*hdr) + le32toh(hdr->bsize) + le32toh(hdr->usize)
2290                                 + le32toh(hdr->fsize)) {
2291                         device_printf(sc->sc_dev, "image '%s' too small (2)\n",
2292                             fp->name);
2293                         goto bad;
2294                 }
2295                 sc->fw_boot.data = ((const char *) fp->data) + sizeof(*hdr);
2296                 sc->fw_boot.size = le32toh(hdr->bsize);
2297                 sc->fw_boot.name = fp->name;
2298                 sc->fw_uc.data = sc->fw_boot.data + sc->fw_boot.size;
2299                 sc->fw_uc.size = le32toh(hdr->usize);
2300                 sc->fw_uc.name = fp->name;
2301                 sc->fw_fw.data = sc->fw_uc.data + sc->fw_uc.size;
2302                 sc->fw_fw.size = le32toh(hdr->fsize);
2303                 sc->fw_fw.name = fp->name;
2304         }
2305 #if 0
2306         device_printf(sc->sc_dev, "boot %d ucode %d fw %d bytes\n",
2307                 sc->fw_boot.size, sc->fw_uc.size, sc->fw_fw.size);
2308 #endif
2309
2310         sc->fw_mode = opmode;
2311         return 0;
2312 bad:
2313         iwi_put_firmware(sc);
2314         return 1;
2315 }
2316
2317 static void
2318 iwi_put_fw(struct iwi_fw *fw)
2319 {
2320         if (fw->fp != NULL) {
2321                 firmware_put(fw->fp, FIRMWARE_UNLOAD);
2322                 fw->fp = NULL;
2323         }
2324         fw->data = NULL;
2325         fw->size = 0;
2326         fw->name = NULL;
2327 }
2328
2329 /*
2330  * Release any cached firmware images.
2331  */
2332 static void
2333 iwi_put_firmware(struct iwi_softc *sc)
2334 {
2335         iwi_put_fw(&sc->fw_uc);
2336         iwi_put_fw(&sc->fw_fw);
2337         iwi_put_fw(&sc->fw_boot);
2338 }
2339
2340 static int
2341 iwi_load_ucode(struct iwi_softc *sc, const struct iwi_fw *fw)
2342 {
2343         uint32_t tmp;
2344         const uint16_t *w;
2345         const char *uc = fw->data;
2346         size_t size = fw->size;
2347         int i, ntries, error;
2348
2349         IWI_LOCK_ASSERT(sc);
2350         error = 0;
2351         CSR_WRITE_4(sc, IWI_CSR_RST, CSR_READ_4(sc, IWI_CSR_RST) |
2352             IWI_RST_STOP_MASTER);
2353         for (ntries = 0; ntries < 5; ntries++) {
2354                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2355                         break;
2356                 DELAY(10);
2357         }
2358         if (ntries == 5) {
2359                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2360                 error = EIO;
2361                 goto fail;
2362         }
2363
2364         MEM_WRITE_4(sc, 0x3000e0, 0x80000000);
2365         DELAY(5000);
2366
2367         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2368         tmp &= ~IWI_RST_PRINCETON_RESET;
2369         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2370
2371         DELAY(5000);
2372         MEM_WRITE_4(sc, 0x3000e0, 0);
2373         DELAY(1000);
2374         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 1);
2375         DELAY(1000);
2376         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 0);
2377         DELAY(1000);
2378         MEM_WRITE_1(sc, 0x200000, 0x00);
2379         MEM_WRITE_1(sc, 0x200000, 0x40);
2380         DELAY(1000);
2381
2382         /* write microcode into adapter memory */
2383         for (w = (const uint16_t *)uc; size > 0; w++, size -= 2)
2384                 MEM_WRITE_2(sc, 0x200010, htole16(*w));
2385
2386         MEM_WRITE_1(sc, 0x200000, 0x00);
2387         MEM_WRITE_1(sc, 0x200000, 0x80);
2388
2389         /* wait until we get an answer */
2390         for (ntries = 0; ntries < 100; ntries++) {
2391                 if (MEM_READ_1(sc, 0x200000) & 1)
2392                         break;
2393                 DELAY(100);
2394         }
2395         if (ntries == 100) {
2396                 device_printf(sc->sc_dev,
2397                     "timeout waiting for ucode to initialize\n");
2398                 error = EIO;
2399                 goto fail;
2400         }
2401
2402         /* read the answer or the firmware will not initialize properly */
2403         for (i = 0; i < 7; i++)
2404                 MEM_READ_4(sc, 0x200004);
2405
2406         MEM_WRITE_1(sc, 0x200000, 0x00);
2407
2408 fail:
2409         return error;
2410 }
2411
2412 /* macro to handle unaligned little endian data in firmware image */
2413 #define GETLE32(p) ((p)[0] | (p)[1] << 8 | (p)[2] << 16 | (p)[3] << 24)
2414
2415 static int
2416 iwi_load_firmware(struct iwi_softc *sc, const struct iwi_fw *fw)
2417 {
2418         u_char *p, *end;
2419         uint32_t sentinel, ctl, src, dst, sum, len, mlen, tmp;
2420         int ntries, error;
2421
2422         IWI_LOCK_ASSERT(sc);
2423
2424         /* copy firmware image to DMA memory */
2425         memcpy(sc->fw_virtaddr, fw->data, fw->size);
2426
2427         /* make sure the adapter will get up-to-date values */
2428         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_PREWRITE);
2429
2430         /* tell the adapter where the command blocks are stored */
2431         MEM_WRITE_4(sc, 0x3000a0, 0x27000);
2432
2433         /*
2434          * Store command blocks into adapter's internal memory using register
2435          * indirections. The adapter will read the firmware image through DMA
2436          * using information stored in command blocks.
2437          */
2438         src = sc->fw_physaddr;
2439         p = sc->fw_virtaddr;
2440         end = p + fw->size;
2441         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0x27000);
2442
2443         while (p < end) {
2444                 dst = GETLE32(p); p += 4; src += 4;
2445                 len = GETLE32(p); p += 4; src += 4;
2446                 p += len;
2447
2448                 while (len > 0) {
2449                         mlen = min(len, IWI_CB_MAXDATALEN);
2450
2451                         ctl = IWI_CB_DEFAULT_CTL | mlen;
2452                         sum = ctl ^ src ^ dst;
2453
2454                         /* write a command block */
2455                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, ctl);
2456                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, src);
2457                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, dst);
2458                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, sum);
2459
2460                         src += mlen;
2461                         dst += mlen;
2462                         len -= mlen;
2463                 }
2464         }
2465
2466         /* write a fictive final command block (sentinel) */
2467         sentinel = CSR_READ_4(sc, IWI_CSR_AUTOINC_ADDR);
2468         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2469
2470         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2471         tmp &= ~(IWI_RST_MASTER_DISABLED | IWI_RST_STOP_MASTER);
2472         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2473
2474         /* tell the adapter to start processing command blocks */
2475         MEM_WRITE_4(sc, 0x3000a4, 0x540100);
2476
2477         /* wait until the adapter reaches the sentinel */
2478         for (ntries = 0; ntries < 400; ntries++) {
2479                 if (MEM_READ_4(sc, 0x3000d0) >= sentinel)
2480                         break;
2481                 DELAY(100);
2482         }
2483         /* sync dma, just in case */
2484         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_POSTWRITE);
2485         if (ntries == 400) {
2486                 device_printf(sc->sc_dev,
2487                     "timeout processing command blocks for %s firmware\n",
2488                     fw->name);
2489                 return EIO;
2490         }
2491
2492         /* we're done with command blocks processing */
2493         MEM_WRITE_4(sc, 0x3000a4, 0x540c00);
2494
2495         /* allow interrupts so we know when the firmware is ready */
2496         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, IWI_INTR_MASK);
2497
2498         /* tell the adapter to initialize the firmware */
2499         CSR_WRITE_4(sc, IWI_CSR_RST, 0);
2500
2501         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2502         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_ALLOW_STANDBY);
2503
2504         /* wait at most one second for firmware initialization to complete */
2505         if ((error = msleep(sc, &sc->sc_mtx, 0, "iwiinit", hz)) != 0) {
2506                 device_printf(sc->sc_dev, "timeout waiting for %s firmware "
2507                     "initialization to complete\n", fw->name);
2508         }
2509
2510         return error;
2511 }
2512
2513 static int
2514 iwi_setpowermode(struct iwi_softc *sc, struct ieee80211vap *vap)
2515 {
2516         uint32_t data;
2517
2518         if (vap->iv_flags & IEEE80211_F_PMGTON) {
2519                 /* XXX set more fine-grained operation */
2520                 data = htole32(IWI_POWER_MODE_MAX);
2521         } else
2522                 data = htole32(IWI_POWER_MODE_CAM);
2523
2524         DPRINTF(("Setting power mode to %u\n", le32toh(data)));
2525         return iwi_cmd(sc, IWI_CMD_SET_POWER_MODE, &data, sizeof data);
2526 }
2527
2528 static int
2529 iwi_setwepkeys(struct iwi_softc *sc, struct ieee80211vap *vap)
2530 {
2531         struct iwi_wep_key wepkey;
2532         struct ieee80211_key *wk;
2533         int error, i;
2534
2535         for (i = 0; i < IEEE80211_WEP_NKID; i++) {
2536                 wk = &vap->iv_nw_keys[i];
2537
2538                 wepkey.cmd = IWI_WEP_KEY_CMD_SETKEY;
2539                 wepkey.idx = i;
2540                 wepkey.len = wk->wk_keylen;
2541                 memset(wepkey.key, 0, sizeof wepkey.key);
2542                 memcpy(wepkey.key, wk->wk_key, wk->wk_keylen);
2543                 DPRINTF(("Setting wep key index %u len %u\n", wepkey.idx,
2544                     wepkey.len));
2545                 error = iwi_cmd(sc, IWI_CMD_SET_WEP_KEY, &wepkey,
2546                     sizeof wepkey);
2547                 if (error != 0)
2548                         return error;
2549         }
2550         return 0;
2551 }
2552
2553 static int
2554 iwi_set_rateset(struct iwi_softc *sc, const struct ieee80211_rateset *net_rs,
2555     int mode, int type)
2556 {
2557         struct iwi_rateset rs;
2558
2559         memset(&rs, 0, sizeof(rs));
2560         rs.mode = mode;
2561         rs.type = type;
2562         rs.nrates = net_rs->rs_nrates;
2563         if (rs.nrates > nitems(rs.rates)) {
2564                 DPRINTF(("Truncating negotiated rate set from %u\n",
2565                     rs.nrates));
2566                 rs.nrates = nitems(rs.rates);
2567         }
2568         memcpy(rs.rates, net_rs->rs_rates, rs.nrates);
2569         DPRINTF(("Setting .11%c%s %s rates (%u)\n",
2570             mode == IWI_MODE_11A ? 'a' : 'b',
2571             mode == IWI_MODE_11G ? "g" : "",
2572             type == IWI_RATESET_TYPE_SUPPORTED ? "supported" : "negotiated",
2573             rs.nrates));
2574
2575         return (iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof(rs)));
2576 }
2577
2578 static int
2579 iwi_config(struct iwi_softc *sc)
2580 {
2581         struct ieee80211com *ic = &sc->sc_ic;
2582         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
2583         struct iwi_configuration config;
2584         struct iwi_txpower power;
2585         uint8_t *macaddr;
2586         uint32_t data;
2587         int error, i;
2588
2589         IWI_LOCK_ASSERT(sc);
2590
2591         macaddr = vap ? vap->iv_myaddr : ic->ic_macaddr;
2592         DPRINTF(("Setting MAC address to %6D\n", macaddr, ":"));
2593         error = iwi_cmd(sc, IWI_CMD_SET_MAC_ADDRESS, macaddr,
2594             IEEE80211_ADDR_LEN);
2595         if (error != 0)
2596                 return error;
2597
2598         memset(&config, 0, sizeof config);
2599         config.bluetooth_coexistence = sc->bluetooth;
2600         config.silence_threshold = 0x1e;
2601         config.antenna = sc->antenna;
2602         config.multicast_enabled = 1;
2603         config.answer_pbreq = (ic->ic_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2604         config.disable_unicast_decryption = 1;
2605         config.disable_multicast_decryption = 1;
2606         if (ic->ic_opmode == IEEE80211_M_MONITOR) {
2607                 config.allow_invalid_frames = 1;
2608                 config.allow_beacon_and_probe_resp = 1;
2609                 config.allow_mgt = 1;
2610         }
2611         DPRINTF(("Configuring adapter\n"));
2612         error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2613         if (error != 0)
2614                 return error;
2615         if (ic->ic_opmode == IEEE80211_M_IBSS) {
2616                 power.mode = IWI_MODE_11B;
2617                 power.nchan = 11;
2618                 for (i = 0; i < 11; i++) {
2619                         power.chan[i].chan = i + 1;
2620                         power.chan[i].power = IWI_TXPOWER_MAX;
2621                 }
2622                 DPRINTF(("Setting .11b channels tx power\n"));
2623                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2624                 if (error != 0)
2625                         return error;
2626
2627                 power.mode = IWI_MODE_11G;
2628                 DPRINTF(("Setting .11g channels tx power\n"));
2629                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2630                 if (error != 0)
2631                         return error;
2632         }
2633
2634         error = iwi_set_rateset(sc, &ic->ic_sup_rates[IEEE80211_MODE_11G],
2635             IWI_MODE_11G, IWI_RATESET_TYPE_SUPPORTED);
2636         if (error != 0)
2637                 return error;
2638
2639         error = iwi_set_rateset(sc, &ic->ic_sup_rates[IEEE80211_MODE_11A],
2640             IWI_MODE_11A, IWI_RATESET_TYPE_SUPPORTED);
2641         if (error != 0)
2642                 return error;
2643
2644         data = htole32(arc4random());
2645         DPRINTF(("Setting initialization vector to %u\n", le32toh(data)));
2646         error = iwi_cmd(sc, IWI_CMD_SET_IV, &data, sizeof data);
2647         if (error != 0)
2648                 return error;
2649
2650         /* enable adapter */
2651         DPRINTF(("Enabling adapter\n"));
2652         return iwi_cmd(sc, IWI_CMD_ENABLE, NULL, 0);
2653 }
2654
2655 static __inline void
2656 set_scan_type(struct iwi_scan_ext *scan, int ix, int scan_type)
2657 {
2658         uint8_t *st = &scan->scan_type[ix / 2];
2659         if (ix % 2)
2660                 *st = (*st & 0xf0) | ((scan_type & 0xf) << 0);
2661         else
2662                 *st = (*st & 0x0f) | ((scan_type & 0xf) << 4);
2663 }
2664
2665 static int
2666 scan_type(const struct ieee80211_scan_state *ss,
2667         const struct ieee80211_channel *chan)
2668 {
2669         /* We can only set one essid for a directed scan */
2670         if (ss->ss_nssid != 0)
2671                 return IWI_SCAN_TYPE_BDIRECTED;
2672         if ((ss->ss_flags & IEEE80211_SCAN_ACTIVE) &&
2673             (chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0)
2674                 return IWI_SCAN_TYPE_BROADCAST;
2675         return IWI_SCAN_TYPE_PASSIVE;
2676 }
2677
2678 static __inline int
2679 scan_band(const struct ieee80211_channel *c)
2680 {
2681         return IEEE80211_IS_CHAN_5GHZ(c) ?  IWI_CHAN_5GHZ : IWI_CHAN_2GHZ;
2682 }
2683
2684 static void
2685 iwi_monitor_scan(void *arg, int npending)
2686 {
2687         struct iwi_softc *sc = arg;
2688         IWI_LOCK_DECL;
2689
2690         IWI_LOCK(sc);
2691         (void) iwi_scanchan(sc, 2000, 0);
2692         IWI_UNLOCK(sc);
2693 }
2694
2695 /*
2696  * Start a scan on the current channel or all channels.
2697  */
2698 static int
2699 iwi_scanchan(struct iwi_softc *sc, unsigned long maxdwell, int allchan)
2700 {
2701         struct ieee80211com *ic = &sc->sc_ic;
2702         struct ieee80211_channel *chan;
2703         struct ieee80211_scan_state *ss;
2704         struct iwi_scan_ext scan;
2705         int error = 0;
2706
2707         IWI_LOCK_ASSERT(sc);
2708         if (sc->fw_state == IWI_FW_SCANNING) {
2709                 /*
2710                  * This should not happen as we only trigger scan_next after
2711                  * completion
2712                  */
2713                 DPRINTF(("%s: called too early - still scanning\n", __func__));
2714                 return (EBUSY);
2715         }
2716         IWI_STATE_BEGIN(sc, IWI_FW_SCANNING);
2717
2718         ss = ic->ic_scan;
2719
2720         memset(&scan, 0, sizeof scan);
2721         scan.full_scan_index = htole32(++sc->sc_scangen);
2722         scan.dwell_time[IWI_SCAN_TYPE_PASSIVE] = htole16(maxdwell);
2723         if (ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) {
2724                 /*
2725                  * Use very short dwell times for when we send probe request
2726                  * frames.  Without this bg scans hang.  Ideally this should
2727                  * be handled with early-termination as done by net80211 but
2728                  * that's not feasible (aborting a scan is problematic).
2729                  */
2730                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(30);
2731                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(30);
2732         } else {
2733                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(maxdwell);
2734                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(maxdwell);
2735         }
2736
2737         /* We can only set one essid for a directed scan */
2738         if (ss->ss_nssid != 0) {
2739                 error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ss->ss_ssid[0].ssid,
2740                     ss->ss_ssid[0].len);
2741                 if (error)
2742                         return (error);
2743         }
2744
2745         if (allchan) {
2746                 int i, next, band, b, bstart;
2747                 /*
2748                  * Convert scan list to run-length encoded channel list
2749                  * the firmware requires (preserving the order setup by
2750                  * net80211).  The first entry in each run specifies the
2751                  * band and the count of items in the run.
2752                  */
2753                 next = 0;               /* next open slot */
2754                 bstart = 0;             /* NB: not needed, silence compiler */
2755                 band = -1;              /* NB: impossible value */
2756                 KASSERT(ss->ss_last > 0, ("no channels"));
2757                 for (i = 0; i < ss->ss_last; i++) {
2758                         chan = ss->ss_chans[i];
2759                         b = scan_band(chan);
2760                         if (b != band) {
2761                                 if (band != -1)
2762                                         scan.channels[bstart] =
2763                                             (next - bstart) | band;
2764                                 /* NB: this allocates a slot for the run-len */
2765                                 band = b, bstart = next++;
2766                         }
2767                         if (next >= IWI_SCAN_CHANNELS) {
2768                                 DPRINTF(("truncating scan list\n"));
2769                                 break;
2770                         }
2771                         scan.channels[next] = ieee80211_chan2ieee(ic, chan);
2772                         set_scan_type(&scan, next, scan_type(ss, chan));
2773                         next++;
2774                 }
2775                 scan.channels[bstart] = (next - bstart) | band;
2776         } else {
2777                 /* Scan the current channel only */
2778                 chan = ic->ic_curchan;
2779                 scan.channels[0] = 1 | scan_band(chan);
2780                 scan.channels[1] = ieee80211_chan2ieee(ic, chan);
2781                 set_scan_type(&scan, 1, scan_type(ss, chan));
2782         }
2783 #ifdef IWI_DEBUG
2784         if (iwi_debug > 0) {
2785                 static const char *scantype[8] =
2786                    { "PSTOP", "PASV", "DIR", "BCAST", "BDIR", "5", "6", "7" };
2787                 int i;
2788                 printf("Scan request: index %u dwell %d/%d/%d\n"
2789                     , le32toh(scan.full_scan_index)
2790                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_PASSIVE])
2791                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BROADCAST])
2792                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED])
2793                 );
2794                 i = 0;
2795                 do {
2796                         int run = scan.channels[i];
2797                         if (run == 0)
2798                                 break;
2799                         printf("Scan %d %s channels:", run & 0x3f,
2800                             run & IWI_CHAN_2GHZ ? "2.4GHz" : "5GHz");
2801                         for (run &= 0x3f, i++; run > 0; run--, i++) {
2802                                 uint8_t type = scan.scan_type[i/2];
2803                                 printf(" %u/%s", scan.channels[i],
2804                                     scantype[(i & 1 ? type : type>>4) & 7]);
2805                         }
2806                         printf("\n");
2807                 } while (i < IWI_SCAN_CHANNELS);
2808         }
2809 #endif
2810
2811         return (iwi_cmd(sc, IWI_CMD_SCAN_EXT, &scan, sizeof scan));
2812 }
2813
2814 static int
2815 iwi_set_sensitivity(struct iwi_softc *sc, int8_t rssi_dbm)
2816 {
2817         struct iwi_sensitivity sens;
2818
2819         DPRINTF(("Setting sensitivity to %d\n", rssi_dbm));
2820
2821         memset(&sens, 0, sizeof sens);
2822         sens.rssi = htole16(rssi_dbm);
2823         return iwi_cmd(sc, IWI_CMD_SET_SENSITIVITY, &sens, sizeof sens);
2824 }
2825
2826 static int
2827 iwi_auth_and_assoc(struct iwi_softc *sc, struct ieee80211vap *vap)
2828 {
2829         struct ieee80211com *ic = vap->iv_ic;
2830         struct ifnet *ifp = vap->iv_ifp;
2831         struct ieee80211_node *ni;
2832         struct iwi_configuration config;
2833         struct iwi_associate *assoc = &sc->assoc;
2834         uint16_t capinfo;
2835         uint32_t data;
2836         int error, mode;
2837
2838         IWI_LOCK_ASSERT(sc);
2839
2840         if (sc->flags & IWI_FLAG_ASSOCIATED) {
2841                 DPRINTF(("Already associated\n"));
2842                 return (-1);
2843         }
2844
2845         ni = ieee80211_ref_node(vap->iv_bss);
2846
2847         IWI_STATE_BEGIN(sc, IWI_FW_ASSOCIATING);
2848         error = 0;
2849         mode = 0;
2850
2851         if (IEEE80211_IS_CHAN_A(ic->ic_curchan))
2852                 mode = IWI_MODE_11A;
2853         else if (IEEE80211_IS_CHAN_G(ic->ic_curchan))
2854                 mode = IWI_MODE_11G;
2855         if (IEEE80211_IS_CHAN_B(ic->ic_curchan))
2856                 mode = IWI_MODE_11B;
2857
2858         if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) {
2859                 memset(&config, 0, sizeof config);
2860                 config.bluetooth_coexistence = sc->bluetooth;
2861                 config.antenna = sc->antenna;
2862                 config.multicast_enabled = 1;
2863                 if (mode == IWI_MODE_11G)
2864                         config.use_protection = 1;
2865                 config.answer_pbreq =
2866                     (vap->iv_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2867                 config.disable_unicast_decryption = 1;
2868                 config.disable_multicast_decryption = 1;
2869                 DPRINTF(("Configuring adapter\n"));
2870                 error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2871                 if (error != 0)
2872                         goto done;
2873         }
2874
2875 #ifdef IWI_DEBUG
2876         if (iwi_debug > 0) {
2877                 printf("Setting ESSID to ");
2878                 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
2879                 printf("\n");
2880         }
2881 #endif
2882         error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ni->ni_essid, ni->ni_esslen);
2883         if (error != 0)
2884                 goto done;
2885
2886         error = iwi_setpowermode(sc, vap);
2887         if (error != 0)
2888                 goto done;
2889
2890         data = htole32(vap->iv_rtsthreshold);
2891         DPRINTF(("Setting RTS threshold to %u\n", le32toh(data)));
2892         error = iwi_cmd(sc, IWI_CMD_SET_RTS_THRESHOLD, &data, sizeof data);
2893         if (error != 0)
2894                 goto done;
2895
2896         data = htole32(vap->iv_fragthreshold);
2897         DPRINTF(("Setting fragmentation threshold to %u\n", le32toh(data)));
2898         error = iwi_cmd(sc, IWI_CMD_SET_FRAG_THRESHOLD, &data, sizeof data);
2899         if (error != 0)
2900                 goto done;
2901
2902         /* the rate set has already been "negotiated" */
2903         error = iwi_set_rateset(sc, &ni->ni_rates, mode,
2904             IWI_RATESET_TYPE_NEGOTIATED);
2905         if (error != 0)
2906                 goto done;
2907
2908         memset(assoc, 0, sizeof *assoc);
2909
2910         if ((vap->iv_flags & IEEE80211_F_WME) && ni->ni_ies.wme_ie != NULL) {
2911                 /* NB: don't treat WME setup as failure */
2912                 if (iwi_wme_setparams(sc) == 0 && iwi_wme_setie(sc) == 0)
2913                         assoc->policy |= htole16(IWI_POLICY_WME);
2914                 /* XXX complain on failure? */
2915         }
2916
2917         if (vap->iv_appie_wpa != NULL) {
2918                 struct ieee80211_appie *ie = vap->iv_appie_wpa;
2919
2920                 DPRINTF(("Setting optional IE (len=%u)\n", ie->ie_len));
2921                 error = iwi_cmd(sc, IWI_CMD_SET_OPTIE, ie->ie_data, ie->ie_len);
2922                 if (error != 0)
2923                         goto done;
2924         }
2925
2926         error = iwi_set_sensitivity(sc, ic->ic_node_getrssi(ni));
2927         if (error != 0)
2928                 goto done;
2929
2930         assoc->mode = mode;
2931         assoc->chan = ic->ic_curchan->ic_ieee;
2932         /*
2933          * NB: do not arrange for shared key auth w/o privacy
2934          *     (i.e. a wep key); it causes a firmware error.
2935          */
2936         if ((vap->iv_flags & IEEE80211_F_PRIVACY) &&
2937             ni->ni_authmode == IEEE80211_AUTH_SHARED) {
2938                 assoc->auth = IWI_AUTH_SHARED;
2939                 /*
2940                  * It's possible to have privacy marked but no default
2941                  * key setup.  This typically is due to a user app bug
2942                  * but if we blindly grab the key the firmware will
2943                  * barf so avoid it for now.
2944                  */
2945                 if (vap->iv_def_txkey != IEEE80211_KEYIX_NONE)
2946                         assoc->auth |= vap->iv_def_txkey << 4;
2947
2948                 error = iwi_setwepkeys(sc, vap);
2949                 if (error != 0)
2950                         goto done;
2951         }
2952         if (vap->iv_flags & IEEE80211_F_WPA)
2953                 assoc->policy |= htole16(IWI_POLICY_WPA);
2954         if (vap->iv_opmode == IEEE80211_M_IBSS && ni->ni_tstamp.tsf == 0)
2955                 assoc->type = IWI_HC_IBSS_START;
2956         else
2957                 assoc->type = IWI_HC_ASSOC;
2958         memcpy(assoc->tstamp, ni->ni_tstamp.data, 8);
2959
2960         if (vap->iv_opmode == IEEE80211_M_IBSS)
2961                 capinfo = IEEE80211_CAPINFO_IBSS;
2962         else
2963                 capinfo = IEEE80211_CAPINFO_ESS;
2964         if (vap->iv_flags & IEEE80211_F_PRIVACY)
2965                 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2966         if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2967             IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
2968                 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2969         if (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)
2970                 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2971         assoc->capinfo = htole16(capinfo);
2972
2973         assoc->lintval = htole16(ic->ic_lintval);
2974         assoc->intval = htole16(ni->ni_intval);
2975         IEEE80211_ADDR_COPY(assoc->bssid, ni->ni_bssid);
2976         if (vap->iv_opmode == IEEE80211_M_IBSS)
2977                 IEEE80211_ADDR_COPY(assoc->dst, ifp->if_broadcastaddr);
2978         else
2979                 IEEE80211_ADDR_COPY(assoc->dst, ni->ni_bssid);
2980
2981         DPRINTF(("%s bssid %6D dst %6D channel %u policy 0x%x "
2982             "auth %u capinfo 0x%x lintval %u bintval %u\n",
2983             assoc->type == IWI_HC_IBSS_START ? "Start" : "Join",
2984             assoc->bssid, ":", assoc->dst, ":",
2985             assoc->chan, le16toh(assoc->policy), assoc->auth,
2986             le16toh(assoc->capinfo), le16toh(assoc->lintval),
2987             le16toh(assoc->intval)));
2988         error = iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
2989 done:
2990         ieee80211_free_node(ni);
2991         if (error)
2992                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
2993
2994         return (error);
2995 }
2996
2997 static void
2998 iwi_disassoc(void *arg, int pending)
2999 {
3000         struct iwi_softc *sc = arg;
3001         IWI_LOCK_DECL;
3002
3003         IWI_LOCK(sc);
3004         iwi_disassociate(sc, 0);
3005         IWI_UNLOCK(sc);
3006 }
3007
3008 static int
3009 iwi_disassociate(struct iwi_softc *sc, int quiet)
3010 {
3011         struct iwi_associate *assoc = &sc->assoc;
3012
3013         if ((sc->flags & IWI_FLAG_ASSOCIATED) == 0) {
3014                 DPRINTF(("Not associated\n"));
3015                 return (-1);
3016         }
3017
3018         IWI_STATE_BEGIN(sc, IWI_FW_DISASSOCIATING);
3019
3020         if (quiet)
3021                 assoc->type = IWI_HC_DISASSOC_QUIET;
3022         else
3023                 assoc->type = IWI_HC_DISASSOC;
3024
3025         DPRINTF(("Trying to disassociate from %6D channel %u\n",
3026             assoc->bssid, ":", assoc->chan));
3027         return iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
3028 }
3029
3030 /*
3031  * release dma resources for the firmware
3032  */
3033 static void
3034 iwi_release_fw_dma(struct iwi_softc *sc)
3035 {
3036         if (sc->fw_flags & IWI_FW_HAVE_PHY)
3037                 bus_dmamap_unload(sc->fw_dmat, sc->fw_map);
3038         if (sc->fw_flags & IWI_FW_HAVE_MAP)
3039                 bus_dmamem_free(sc->fw_dmat, sc->fw_virtaddr, sc->fw_map);
3040         if (sc->fw_flags & IWI_FW_HAVE_DMAT)
3041                 bus_dma_tag_destroy(sc->fw_dmat);
3042
3043         sc->fw_flags = 0;
3044         sc->fw_dma_size = 0;
3045         sc->fw_dmat = NULL;
3046         sc->fw_map = NULL;
3047         sc->fw_physaddr = 0;
3048         sc->fw_virtaddr = NULL;
3049 }
3050
3051 /*
3052  * allocate the dma descriptor for the firmware.
3053  * Return 0 on success, 1 on error.
3054  * Must be called unlocked, protected by IWI_FLAG_FW_LOADING.
3055  */
3056 static int
3057 iwi_init_fw_dma(struct iwi_softc *sc, int size)
3058 {
3059         if (sc->fw_dma_size >= size)
3060                 return 0;
3061         if (bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
3062             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
3063             size, 1, size, 0, NULL, NULL, &sc->fw_dmat) != 0) {
3064                 device_printf(sc->sc_dev,
3065                     "could not create firmware DMA tag\n");
3066                 goto error;
3067         }
3068         sc->fw_flags |= IWI_FW_HAVE_DMAT;
3069         if (bus_dmamem_alloc(sc->fw_dmat, &sc->fw_virtaddr, 0,
3070             &sc->fw_map) != 0) {
3071                 device_printf(sc->sc_dev,
3072                     "could not allocate firmware DMA memory\n");
3073                 goto error;
3074         }
3075         sc->fw_flags |= IWI_FW_HAVE_MAP;
3076         if (bus_dmamap_load(sc->fw_dmat, sc->fw_map, sc->fw_virtaddr,
3077             size, iwi_dma_map_addr, &sc->fw_physaddr, 0) != 0) {
3078                 device_printf(sc->sc_dev, "could not load firmware DMA map\n");
3079                 goto error;
3080         }
3081         sc->fw_flags |= IWI_FW_HAVE_PHY;
3082         sc->fw_dma_size = size;
3083         return 0;
3084
3085 error:
3086         iwi_release_fw_dma(sc);
3087         return 1;
3088 }
3089
3090 static void
3091 iwi_init_locked(struct iwi_softc *sc)
3092 {
3093         struct iwi_rx_data *data;
3094         int i;
3095
3096         IWI_LOCK_ASSERT(sc);
3097
3098         if (sc->fw_state == IWI_FW_LOADING) {
3099                 device_printf(sc->sc_dev, "%s: already loading\n", __func__);
3100                 return;         /* XXX: condvar? */
3101         }
3102
3103         iwi_stop_locked(sc);
3104
3105         IWI_STATE_BEGIN(sc, IWI_FW_LOADING);
3106
3107         if (iwi_reset(sc) != 0) {
3108                 device_printf(sc->sc_dev, "could not reset adapter\n");
3109                 goto fail;
3110         }
3111         if (iwi_load_firmware(sc, &sc->fw_boot) != 0) {
3112                 device_printf(sc->sc_dev,
3113                     "could not load boot firmware %s\n", sc->fw_boot.name);
3114                 goto fail;
3115         }
3116         if (iwi_load_ucode(sc, &sc->fw_uc) != 0) {
3117                 device_printf(sc->sc_dev,
3118                     "could not load microcode %s\n", sc->fw_uc.name);
3119                 goto fail;
3120         }
3121
3122         iwi_stop_master(sc);
3123
3124         CSR_WRITE_4(sc, IWI_CSR_CMD_BASE, sc->cmdq.physaddr);
3125         CSR_WRITE_4(sc, IWI_CSR_CMD_SIZE, sc->cmdq.count);
3126         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
3127
3128         CSR_WRITE_4(sc, IWI_CSR_TX1_BASE, sc->txq[0].physaddr);
3129         CSR_WRITE_4(sc, IWI_CSR_TX1_SIZE, sc->txq[0].count);
3130         CSR_WRITE_4(sc, IWI_CSR_TX1_WIDX, sc->txq[0].cur);
3131
3132         CSR_WRITE_4(sc, IWI_CSR_TX2_BASE, sc->txq[1].physaddr);
3133         CSR_WRITE_4(sc, IWI_CSR_TX2_SIZE, sc->txq[1].count);
3134         CSR_WRITE_4(sc, IWI_CSR_TX2_WIDX, sc->txq[1].cur);
3135
3136         CSR_WRITE_4(sc, IWI_CSR_TX3_BASE, sc->txq[2].physaddr);
3137         CSR_WRITE_4(sc, IWI_CSR_TX3_SIZE, sc->txq[2].count);
3138         CSR_WRITE_4(sc, IWI_CSR_TX3_WIDX, sc->txq[2].cur);
3139
3140         CSR_WRITE_4(sc, IWI_CSR_TX4_BASE, sc->txq[3].physaddr);
3141         CSR_WRITE_4(sc, IWI_CSR_TX4_SIZE, sc->txq[3].count);
3142         CSR_WRITE_4(sc, IWI_CSR_TX4_WIDX, sc->txq[3].cur);
3143
3144         for (i = 0; i < sc->rxq.count; i++) {
3145                 data = &sc->rxq.data[i];
3146                 CSR_WRITE_4(sc, data->reg, data->physaddr);
3147         }
3148
3149         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, sc->rxq.count - 1);
3150
3151         if (iwi_load_firmware(sc, &sc->fw_fw) != 0) {
3152                 device_printf(sc->sc_dev,
3153                     "could not load main firmware %s\n", sc->fw_fw.name);
3154                 goto fail;
3155         }
3156         sc->flags |= IWI_FLAG_FW_INITED;
3157
3158         IWI_STATE_END(sc, IWI_FW_LOADING);
3159
3160         if (iwi_config(sc) != 0) {
3161                 device_printf(sc->sc_dev, "unable to enable adapter\n");
3162                 goto fail2;
3163         }
3164
3165         callout_reset(&sc->sc_wdtimer, hz, iwi_watchdog, sc);
3166         sc->sc_running = 1;
3167         return;
3168 fail:
3169         IWI_STATE_END(sc, IWI_FW_LOADING);
3170 fail2:
3171         iwi_stop_locked(sc);
3172 }
3173
3174 static void
3175 iwi_init(void *priv)
3176 {
3177         struct iwi_softc *sc = priv;
3178         struct ieee80211com *ic = &sc->sc_ic;
3179         IWI_LOCK_DECL;
3180
3181         IWI_LOCK(sc);
3182         iwi_init_locked(sc);
3183         IWI_UNLOCK(sc);
3184
3185         if (sc->sc_running)
3186                 ieee80211_start_all(ic);
3187 }
3188
3189 static void
3190 iwi_stop_locked(void *priv)
3191 {
3192         struct iwi_softc *sc = priv;
3193
3194         IWI_LOCK_ASSERT(sc);
3195
3196         sc->sc_running = 0;
3197
3198         if (sc->sc_softled) {
3199                 callout_stop(&sc->sc_ledtimer);
3200                 sc->sc_blinking = 0;
3201         }
3202         callout_stop(&sc->sc_wdtimer);
3203         callout_stop(&sc->sc_rftimer);
3204
3205         iwi_stop_master(sc);
3206
3207         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_SOFT_RESET);
3208
3209         /* reset rings */
3210         iwi_reset_cmd_ring(sc, &sc->cmdq);
3211         iwi_reset_tx_ring(sc, &sc->txq[0]);
3212         iwi_reset_tx_ring(sc, &sc->txq[1]);
3213         iwi_reset_tx_ring(sc, &sc->txq[2]);
3214         iwi_reset_tx_ring(sc, &sc->txq[3]);
3215         iwi_reset_rx_ring(sc, &sc->rxq);
3216
3217         sc->sc_tx_timer = 0;
3218         sc->sc_state_timer = 0;
3219         sc->sc_busy_timer = 0;
3220         sc->flags &= ~(IWI_FLAG_BUSY | IWI_FLAG_ASSOCIATED);
3221         sc->fw_state = IWI_FW_IDLE;
3222         wakeup(sc);
3223 }
3224
3225 static void
3226 iwi_stop(struct iwi_softc *sc)
3227 {
3228         IWI_LOCK_DECL;
3229
3230         IWI_LOCK(sc);
3231         iwi_stop_locked(sc);
3232         IWI_UNLOCK(sc);
3233 }
3234
3235 static void
3236 iwi_restart(void *arg, int npending)
3237 {
3238         struct iwi_softc *sc = arg;
3239
3240         iwi_init(sc);
3241 }
3242
3243 /*
3244  * Return whether or not the radio is enabled in hardware
3245  * (i.e. the rfkill switch is "off").
3246  */
3247 static int
3248 iwi_getrfkill(struct iwi_softc *sc)
3249 {
3250         return (CSR_READ_4(sc, IWI_CSR_IO) & IWI_IO_RADIO_ENABLED) == 0;
3251 }
3252
3253 static void
3254 iwi_radio_on(void *arg, int pending)
3255 {
3256         struct iwi_softc *sc = arg;
3257         struct ieee80211com *ic = &sc->sc_ic;
3258
3259         device_printf(sc->sc_dev, "radio turned on\n");
3260
3261         iwi_init(sc);
3262         ieee80211_notify_radio(ic, 1);
3263 }
3264
3265 static void
3266 iwi_rfkill_poll(void *arg)
3267 {
3268         struct iwi_softc *sc = arg;
3269
3270         IWI_LOCK_ASSERT(sc);
3271
3272         /*
3273          * Check for a change in rfkill state.  We get an
3274          * interrupt when a radio is disabled but not when
3275          * it is enabled so we must poll for the latter.
3276          */
3277         if (!iwi_getrfkill(sc)) {
3278                 ieee80211_runtask(&sc->sc_ic, &sc->sc_radiontask);
3279                 return;
3280         }
3281         callout_reset(&sc->sc_rftimer, 2*hz, iwi_rfkill_poll, sc);
3282 }
3283
3284 static void
3285 iwi_radio_off(void *arg, int pending)
3286 {
3287         struct iwi_softc *sc = arg;
3288         struct ieee80211com *ic = &sc->sc_ic;
3289         IWI_LOCK_DECL;
3290
3291         device_printf(sc->sc_dev, "radio turned off\n");
3292
3293         ieee80211_notify_radio(ic, 0);
3294
3295         IWI_LOCK(sc);
3296         iwi_stop_locked(sc);
3297         iwi_rfkill_poll(sc);
3298         IWI_UNLOCK(sc);
3299 }
3300
3301 static int
3302 iwi_sysctl_stats(SYSCTL_HANDLER_ARGS)
3303 {
3304         struct iwi_softc *sc = arg1;
3305         uint32_t size, buf[128];
3306
3307         memset(buf, 0, sizeof buf);
3308
3309         if (!(sc->flags & IWI_FLAG_FW_INITED))
3310                 return SYSCTL_OUT(req, buf, sizeof buf);
3311
3312         size = min(CSR_READ_4(sc, IWI_CSR_TABLE0_SIZE), 128 - 1);
3313         CSR_READ_REGION_4(sc, IWI_CSR_TABLE0_BASE, &buf[1], size);
3314
3315         return SYSCTL_OUT(req, buf, size);
3316 }
3317
3318 static int
3319 iwi_sysctl_radio(SYSCTL_HANDLER_ARGS)
3320 {
3321         struct iwi_softc *sc = arg1;
3322         int val = !iwi_getrfkill(sc);
3323
3324         return SYSCTL_OUT(req, &val, sizeof val);
3325 }
3326
3327 /*
3328  * Add sysctl knobs.
3329  */
3330 static void
3331 iwi_sysctlattach(struct iwi_softc *sc)
3332 {
3333         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
3334         struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
3335
3336         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "radio",
3337             CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc, 0,
3338             iwi_sysctl_radio, "I",
3339             "radio transmitter switch state (0=off, 1=on)");
3340
3341         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "stats",
3342             CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc, 0,
3343             iwi_sysctl_stats, "S", "statistics");
3344
3345         sc->bluetooth = 0;
3346         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "bluetooth",
3347             CTLFLAG_RW, &sc->bluetooth, 0, "bluetooth coexistence");
3348
3349         sc->antenna = IWI_ANTENNA_AUTO;
3350         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "antenna",
3351             CTLFLAG_RW, &sc->antenna, 0, "antenna (0=auto)");
3352 }
3353
3354 /*
3355  * LED support.
3356  *
3357  * Different cards have different capabilities.  Some have three
3358  * led's while others have only one.  The linux ipw driver defines
3359  * led's for link state (associated or not), band (11a, 11g, 11b),
3360  * and for link activity.  We use one led and vary the blink rate
3361  * according to the tx/rx traffic a la the ath driver.
3362  */
3363
3364 static __inline uint32_t
3365 iwi_toggle_event(uint32_t r)
3366 {
3367         return r &~ (IWI_RST_STANDBY | IWI_RST_GATE_ODMA |
3368                      IWI_RST_GATE_IDMA | IWI_RST_GATE_ADMA);
3369 }
3370
3371 static uint32_t
3372 iwi_read_event(struct iwi_softc *sc)
3373 {
3374         return MEM_READ_4(sc, IWI_MEM_EEPROM_EVENT);
3375 }
3376
3377 static void
3378 iwi_write_event(struct iwi_softc *sc, uint32_t v)
3379 {
3380         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, v);
3381 }
3382
3383 static void
3384 iwi_led_done(void *arg)
3385 {
3386         struct iwi_softc *sc = arg;
3387
3388         sc->sc_blinking = 0;
3389 }
3390
3391 /*
3392  * Turn the activity LED off: flip the pin and then set a timer so no
3393  * update will happen for the specified duration.
3394  */
3395 static void
3396 iwi_led_off(void *arg)
3397 {
3398         struct iwi_softc *sc = arg;
3399         uint32_t v;
3400
3401         v = iwi_read_event(sc);
3402         v &= ~sc->sc_ledpin;
3403         iwi_write_event(sc, iwi_toggle_event(v));
3404         callout_reset(&sc->sc_ledtimer, sc->sc_ledoff, iwi_led_done, sc);
3405 }
3406
3407 /*
3408  * Blink the LED according to the specified on/off times.
3409  */
3410 static void
3411 iwi_led_blink(struct iwi_softc *sc, int on, int off)
3412 {
3413         uint32_t v;
3414
3415         v = iwi_read_event(sc);
3416         v |= sc->sc_ledpin;
3417         iwi_write_event(sc, iwi_toggle_event(v));
3418         sc->sc_blinking = 1;
3419         sc->sc_ledoff = off;
3420         callout_reset(&sc->sc_ledtimer, on, iwi_led_off, sc);
3421 }
3422
3423 static void
3424 iwi_led_event(struct iwi_softc *sc, int event)
3425 {
3426         /* NB: on/off times from the Atheros NDIS driver, w/ permission */
3427         static const struct {
3428                 u_int           rate;           /* tx/rx iwi rate */
3429                 u_int16_t       timeOn;         /* LED on time (ms) */
3430                 u_int16_t       timeOff;        /* LED off time (ms) */
3431         } blinkrates[] = {
3432                 { IWI_RATE_OFDM54, 40,  10 },
3433                 { IWI_RATE_OFDM48, 44,  11 },
3434                 { IWI_RATE_OFDM36, 50,  13 },
3435                 { IWI_RATE_OFDM24, 57,  14 },
3436                 { IWI_RATE_OFDM18, 67,  16 },
3437                 { IWI_RATE_OFDM12, 80,  20 },
3438                 { IWI_RATE_DS11,  100,  25 },
3439                 { IWI_RATE_OFDM9, 133,  34 },
3440                 { IWI_RATE_OFDM6, 160,  40 },
3441                 { IWI_RATE_DS5,   200,  50 },
3442                 {            6,   240,  58 },   /* XXX 3Mb/s if it existed */
3443                 { IWI_RATE_DS2,   267,  66 },
3444                 { IWI_RATE_DS1,   400, 100 },
3445                 {            0,   500, 130 },   /* unknown rate/polling */
3446         };
3447         uint32_t txrate;
3448         int j = 0;                      /* XXX silence compiler */
3449
3450         sc->sc_ledevent = ticks;        /* time of last event */
3451         if (sc->sc_blinking)            /* don't interrupt active blink */
3452                 return;
3453         switch (event) {
3454         case IWI_LED_POLL:
3455                 j = nitems(blinkrates)-1;
3456                 break;
3457         case IWI_LED_TX:
3458                 /* read current transmission rate from adapter */
3459                 txrate = CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE);
3460                 if (blinkrates[sc->sc_txrix].rate != txrate) {
3461                         for (j = 0; j < nitems(blinkrates)-1; j++)
3462                                 if (blinkrates[j].rate == txrate)
3463                                         break;
3464                         sc->sc_txrix = j;
3465                 } else
3466                         j = sc->sc_txrix;
3467                 break;
3468         case IWI_LED_RX:
3469                 if (blinkrates[sc->sc_rxrix].rate != sc->sc_rxrate) {
3470                         for (j = 0; j < nitems(blinkrates)-1; j++)
3471                                 if (blinkrates[j].rate == sc->sc_rxrate)
3472                                         break;
3473                         sc->sc_rxrix = j;
3474                 } else
3475                         j = sc->sc_rxrix;
3476                 break;
3477         }
3478         /* XXX beware of overflow */
3479         iwi_led_blink(sc, (blinkrates[j].timeOn * hz) / 1000,
3480                 (blinkrates[j].timeOff * hz) / 1000);
3481 }
3482
3483 static int
3484 iwi_sysctl_softled(SYSCTL_HANDLER_ARGS)
3485 {
3486         struct iwi_softc *sc = arg1;
3487         int softled = sc->sc_softled;
3488         int error;
3489
3490         error = sysctl_handle_int(oidp, &softled, 0, req);
3491         if (error || !req->newptr)
3492                 return error;
3493         softled = (softled != 0);
3494         if (softled != sc->sc_softled) {
3495                 if (softled) {
3496                         uint32_t v = iwi_read_event(sc);
3497                         v &= ~sc->sc_ledpin;
3498                         iwi_write_event(sc, iwi_toggle_event(v));
3499                 }
3500                 sc->sc_softled = softled;
3501         }
3502         return 0;
3503 }
3504
3505 static void
3506 iwi_ledattach(struct iwi_softc *sc)
3507 {
3508         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
3509         struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
3510
3511         sc->sc_blinking = 0;
3512         sc->sc_ledstate = 1;
3513         sc->sc_ledidle = (2700*hz)/1000;        /* 2.7sec */
3514         callout_init_mtx(&sc->sc_ledtimer, &sc->sc_mtx, 0);
3515
3516         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3517             "softled", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, sc, 0,
3518             iwi_sysctl_softled, "I", "enable/disable software LED support");
3519         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3520                 "ledpin", CTLFLAG_RW, &sc->sc_ledpin, 0,
3521                 "pin setting to turn activity LED on");
3522         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3523                 "ledidle", CTLFLAG_RW, &sc->sc_ledidle, 0,
3524                 "idle time for inactivity LED (ticks)");
3525         /* XXX for debugging */
3526         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3527                 "nictype", CTLFLAG_RD, &sc->sc_nictype, 0,
3528                 "NIC type from EEPROM");
3529
3530         sc->sc_ledpin = IWI_RST_LED_ACTIVITY;
3531         sc->sc_softled = 1;
3532
3533         sc->sc_nictype = (iwi_read_prom_word(sc, IWI_EEPROM_NIC) >> 8) & 0xff;
3534         if (sc->sc_nictype == 1) {
3535                 /*
3536                  * NB: led's are reversed.
3537                  */
3538                 sc->sc_ledpin = IWI_RST_LED_ASSOCIATED;
3539         }
3540 }
3541
3542 static void
3543 iwi_scan_start(struct ieee80211com *ic)
3544 {
3545         /* ignore */
3546 }
3547
3548 static void
3549 iwi_set_channel(struct ieee80211com *ic)
3550 {
3551         struct iwi_softc *sc = ic->ic_softc;
3552
3553         if (sc->fw_state == IWI_FW_IDLE)
3554                 iwi_setcurchan(sc, ic->ic_curchan->ic_ieee);
3555 }
3556
3557 static void
3558 iwi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
3559 {
3560         struct ieee80211vap *vap = ss->ss_vap;
3561         struct iwi_softc *sc = vap->iv_ic->ic_softc;
3562         IWI_LOCK_DECL;
3563
3564         IWI_LOCK(sc);
3565         if (iwi_scanchan(sc, maxdwell, 0))
3566                 ieee80211_cancel_scan(vap);
3567         IWI_UNLOCK(sc);
3568 }
3569
3570 static void
3571 iwi_scan_mindwell(struct ieee80211_scan_state *ss)
3572 {
3573         /* NB: don't try to abort scan; wait for firmware to finish */
3574 }
3575
3576 static void
3577 iwi_scan_end(struct ieee80211com *ic)
3578 {
3579         struct iwi_softc *sc = ic->ic_softc;
3580         IWI_LOCK_DECL;
3581
3582         IWI_LOCK(sc);
3583         sc->flags &= ~IWI_FLAG_CHANNEL_SCAN;
3584         /* NB: make sure we're still scanning */
3585         if (sc->fw_state == IWI_FW_SCANNING)
3586                 iwi_cmd(sc, IWI_CMD_ABORT_SCAN, NULL, 0);
3587         IWI_UNLOCK(sc);
3588 }
3589
3590 static void
3591 iwi_collect_bands(struct ieee80211com *ic, uint8_t bands[], size_t bands_sz)
3592 {
3593         struct iwi_softc *sc = ic->ic_softc;
3594         device_t dev = sc->sc_dev;
3595
3596         memset(bands, 0, bands_sz);
3597         setbit(bands, IEEE80211_MODE_11B);
3598         setbit(bands, IEEE80211_MODE_11G);
3599         if (pci_get_device(dev) >= 0x4223)
3600                 setbit(bands, IEEE80211_MODE_11A);
3601 }
3602
3603 static void
3604 iwi_getradiocaps(struct ieee80211com *ic,
3605     int maxchans, int *nchans, struct ieee80211_channel chans[])
3606 {
3607         uint8_t bands[IEEE80211_MODE_BYTES];
3608
3609         iwi_collect_bands(ic, bands, sizeof(bands));
3610         *nchans = 0;
3611         if (isset(bands, IEEE80211_MODE_11B) || isset(bands, IEEE80211_MODE_11G))
3612                 ieee80211_add_channels_default_2ghz(chans, maxchans, nchans,
3613                     bands, 0);
3614         if (isset(bands, IEEE80211_MODE_11A)) {
3615                 ieee80211_add_channel_list_5ghz(chans, maxchans, nchans,
3616                     def_chan_5ghz_band1, nitems(def_chan_5ghz_band1),
3617                     bands, 0);
3618                 ieee80211_add_channel_list_5ghz(chans, maxchans, nchans,
3619                     def_chan_5ghz_band2, nitems(def_chan_5ghz_band2),
3620                     bands, 0);
3621                 ieee80211_add_channel_list_5ghz(chans, maxchans, nchans,
3622                     def_chan_5ghz_band3, nitems(def_chan_5ghz_band3),
3623                     bands, 0);
3624         }
3625 }