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_2ghz[] =
 136         { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 };
 137 static const uint8_t def_chan_5ghz_band1[] =
 138         { 36, 40, 44, 48, 52, 56, 60, 64 };
 139 static const uint8_t def_chan_5ghz_band2[] =
 140         { 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 };
 141 static const uint8_t def_chan_5ghz_band3[] =
 142         { 149, 153, 157, 161, 165 };
 143
 144 static struct ieee80211vap *iwi_vap_create(struct ieee80211com *,
 145                     const char [IFNAMSIZ], int, enum ieee80211_opmode, int,
 146                     const uint8_t [IEEE80211_ADDR_LEN],
 147                     const uint8_t [IEEE80211_ADDR_LEN]);
 148 static void     iwi_vap_delete(struct ieee80211vap *);
 149 static void     iwi_dma_map_addr(void *, bus_dma_segment_t *, int, int);
 150 static int      iwi_alloc_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *,
 151                     int);
 152 static void     iwi_reset_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 153 static void     iwi_free_cmd_ring(struct iwi_softc *, struct iwi_cmd_ring *);
 154 static int      iwi_alloc_tx_ring(struct iwi_softc *, struct iwi_tx_ring *,
 155                     int, bus_addr_t, bus_addr_t);
 156 static void     iwi_reset_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 157 static void     iwi_free_tx_ring(struct iwi_softc *, struct iwi_tx_ring *);
 158 static int      iwi_alloc_rx_ring(struct iwi_softc *, struct iwi_rx_ring *,
 159                     int);
 160 static void     iwi_reset_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 161 static void     iwi_free_rx_ring(struct iwi_softc *, struct iwi_rx_ring *);
 162 static struct ieee80211_node *iwi_node_alloc(struct ieee80211vap *,
 163                     const uint8_t [IEEE80211_ADDR_LEN]);
 164 static void     iwi_node_free(struct ieee80211_node *);
 165 static void     iwi_media_status(struct ifnet *, struct ifmediareq *);
 166 static int      iwi_newstate(struct ieee80211vap *, enum ieee80211_state, int);
 167 static void     iwi_wme_init(struct iwi_softc *);
 168 static int      iwi_wme_setparams(struct iwi_softc *);
 169 static int      iwi_wme_update(struct ieee80211com *);
 170 static uint16_t iwi_read_prom_word(struct iwi_softc *, uint8_t);
 171 static void     iwi_frame_intr(struct iwi_softc *, struct iwi_rx_data *, int,
 172                     struct iwi_frame *);
 173 static void     iwi_notification_intr(struct iwi_softc *, struct iwi_notif *);
 174 static void     iwi_rx_intr(struct iwi_softc *);
 175 static void     iwi_tx_intr(struct iwi_softc *, struct iwi_tx_ring *);
 176 static void     iwi_intr(void *);
 177 static int      iwi_cmd(struct iwi_softc *, uint8_t, void *, uint8_t);
 178 static void     iwi_write_ibssnode(struct iwi_softc *, const u_int8_t [], int);
 179 static int      iwi_tx_start(struct iwi_softc *, struct mbuf *,
 180                     struct ieee80211_node *, int);
 181 static int      iwi_raw_xmit(struct ieee80211_node *, struct mbuf *,
 182                     const struct ieee80211_bpf_params *);
 183 static void     iwi_start(struct iwi_softc *);
 184 static int      iwi_transmit(struct ieee80211com *, struct mbuf *);
 185 static void     iwi_watchdog(void *);
 186 static int      iwi_ioctl(struct ieee80211com *, u_long, void *);
 187 static void     iwi_parent(struct ieee80211com *);
 188 static void     iwi_stop_master(struct iwi_softc *);
 189 static int      iwi_reset(struct iwi_softc *);
 190 static int      iwi_load_ucode(struct iwi_softc *, const struct iwi_fw *);
 191 static int      iwi_load_firmware(struct iwi_softc *, const struct iwi_fw *);
 192 static void     iwi_release_fw_dma(struct iwi_softc *sc);
 193 static int      iwi_config(struct iwi_softc *);
 194 static int      iwi_get_firmware(struct iwi_softc *, enum ieee80211_opmode);
 195 static void     iwi_put_firmware(struct iwi_softc *);
 196 static void     iwi_monitor_scan(void *, int);
 197 static int      iwi_scanchan(struct iwi_softc *, unsigned long, int);
 198 static void     iwi_scan_start(struct ieee80211com *);
 199 static void     iwi_scan_end(struct ieee80211com *);
 200 static void     iwi_set_channel(struct ieee80211com *);
 201 static void     iwi_scan_curchan(struct ieee80211_scan_state *, unsigned long maxdwell);
 202 static void     iwi_scan_mindwell(struct ieee80211_scan_state *);
 203 static int      iwi_auth_and_assoc(struct iwi_softc *, struct ieee80211vap *);
 204 static void     iwi_disassoc(void *, int);
 205 static int      iwi_disassociate(struct iwi_softc *, int quiet);
 206 static void     iwi_init_locked(struct iwi_softc *);
 207 static void     iwi_init(void *);
 208 static int      iwi_init_fw_dma(struct iwi_softc *, int);
 209 static void     iwi_stop_locked(void *);
 210 static void     iwi_stop(struct iwi_softc *);
 211 static void     iwi_restart(void *, int);
 212 static int      iwi_getrfkill(struct iwi_softc *);
 213 static void     iwi_radio_on(void *, int);
 214 static void     iwi_radio_off(void *, int);
 215 static void     iwi_sysctlattach(struct iwi_softc *);
 216 static void     iwi_led_event(struct iwi_softc *, int);
 217 static void     iwi_ledattach(struct iwi_softc *);
 218 static void     iwi_collect_bands(struct ieee80211com *, uint8_t [], size_t);
 219 static void     iwi_getradiocaps(struct ieee80211com *, int, int *,
 220                     struct ieee80211_channel []);
 221
 222 static int iwi_probe(device_t);
 223 static int iwi_attach(device_t);
 224 static int iwi_detach(device_t);
 225 static int iwi_shutdown(device_t);
 226 static int iwi_suspend(device_t);
 227 static int iwi_resume(device_t);
 228
 229 static device_method_t iwi_methods[] = {
 230         /* Device interface */
 231         DEVMETHOD(device_probe,         iwi_probe),
 232         DEVMETHOD(device_attach,        iwi_attach),
 233         DEVMETHOD(device_detach,        iwi_detach),
 234         DEVMETHOD(device_shutdown,      iwi_shutdown),
 235         DEVMETHOD(device_suspend,       iwi_suspend),
 236         DEVMETHOD(device_resume,        iwi_resume),
 237
 238         DEVMETHOD_END
 239 };
 240
 241 static driver_t iwi_driver = {
 242         "iwi",
 243         iwi_methods,
 244         sizeof (struct iwi_softc)
 245 };
 246
 247 static devclass_t iwi_devclass;
 248
 249 DRIVER_MODULE(iwi, pci, iwi_driver, iwi_devclass, NULL, NULL);
 250
 251 MODULE_VERSION(iwi, 1);
 252
 253 static __inline uint8_t
 254 MEM_READ_1(struct iwi_softc *sc, uint32_t addr)
 255 {
 256         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 257         return CSR_READ_1(sc, IWI_CSR_INDIRECT_DATA);
 258 }
 259
 260 static __inline uint32_t
 261 MEM_READ_4(struct iwi_softc *sc, uint32_t addr)
 262 {
 263         CSR_WRITE_4(sc, IWI_CSR_INDIRECT_ADDR, addr);
 264         return CSR_READ_4(sc, IWI_CSR_INDIRECT_DATA);
 265 }
 266
 267 static int
 268 iwi_probe(device_t dev)
 269 {
 270         const struct iwi_ident *ident;
 271
 272         for (ident = iwi_ident_table; ident->name != NULL; ident++) {
 273                 if (pci_get_vendor(dev) == ident->vendor &&
 274                     pci_get_device(dev) == ident->device) {
 275                         device_set_desc(dev, ident->name);
 276                         return (BUS_PROBE_DEFAULT);
 277                 }
 278         }
 279         return ENXIO;
 280 }
 281
 282 static int
 283 iwi_attach(device_t dev)
 284 {
 285         struct iwi_softc *sc = device_get_softc(dev);
 286         struct ieee80211com *ic = &sc->sc_ic;
 287         uint16_t val;
 288         int i, error;
 289
 290         sc->sc_dev = dev;
 291         sc->sc_ledevent = ticks;
 292
 293         IWI_LOCK_INIT(sc);
 294         mbufq_init(&sc->sc_snd, ifqmaxlen);
 295
 296         sc->sc_unr = new_unrhdr(1, IWI_MAX_IBSSNODE-1, &sc->sc_mtx);
 297
 298         TASK_INIT(&sc->sc_radiontask, 0, iwi_radio_on, sc);
 299         TASK_INIT(&sc->sc_radiofftask, 0, iwi_radio_off, sc);
 300         TASK_INIT(&sc->sc_restarttask, 0, iwi_restart, sc);
 301         TASK_INIT(&sc->sc_disassoctask, 0, iwi_disassoc, sc);
 302         TASK_INIT(&sc->sc_monitortask, 0, iwi_monitor_scan, sc);
 303
 304         callout_init_mtx(&sc->sc_wdtimer, &sc->sc_mtx, 0);
 305         callout_init_mtx(&sc->sc_rftimer, &sc->sc_mtx, 0);
 306
 307         pci_write_config(dev, 0x41, 0, 1);
 308
 309         /* enable bus-mastering */
 310         pci_enable_busmaster(dev);
 311
 312         i = PCIR_BAR(0);
 313         sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i, RF_ACTIVE);
 314         if (sc->mem == NULL) {
 315                 device_printf(dev, "could not allocate memory resource\n");
 316                 goto fail;
 317         }
 318
 319         sc->sc_st = rman_get_bustag(sc->mem);
 320         sc->sc_sh = rman_get_bushandle(sc->mem);
 321
 322         i = 0;
 323         sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i,
 324             RF_ACTIVE | RF_SHAREABLE);
 325         if (sc->irq == NULL) {
 326                 device_printf(dev, "could not allocate interrupt resource\n");
 327                 goto fail;
 328         }
 329
 330         if (iwi_reset(sc) != 0) {
 331                 device_printf(dev, "could not reset adapter\n");
 332                 goto fail;
 333         }
 334
 335         /*
 336          * Allocate rings.
 337          */
 338         if (iwi_alloc_cmd_ring(sc, &sc->cmdq, IWI_CMD_RING_COUNT) != 0) {
 339                 device_printf(dev, "could not allocate Cmd ring\n");
 340                 goto fail;
 341         }
 342
 343         for (i = 0; i < 4; i++) {
 344                 error = iwi_alloc_tx_ring(sc, &sc->txq[i], IWI_TX_RING_COUNT,
 345                     IWI_CSR_TX1_RIDX + i * 4,
 346                     IWI_CSR_TX1_WIDX + i * 4);
 347                 if (error != 0) {
 348                         device_printf(dev, "could not allocate Tx ring %d\n",
 349                                 i+i);
 350                         goto fail;
 351                 }
 352         }
 353
 354         if (iwi_alloc_rx_ring(sc, &sc->rxq, IWI_RX_RING_COUNT) != 0) {
 355                 device_printf(dev, "could not allocate Rx ring\n");
 356                 goto fail;
 357         }
 358
 359         iwi_wme_init(sc);
 360
 361         ic->ic_softc = sc;
 362         ic->ic_name = device_get_nameunit(dev);
 363         ic->ic_opmode = IEEE80211_M_STA;
 364         ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
 365
 366         /* set device capabilities */
 367         ic->ic_caps =
 368               IEEE80211_C_STA           /* station mode supported */
 369             | IEEE80211_C_IBSS          /* IBSS mode supported */
 370             | IEEE80211_C_MONITOR       /* monitor mode supported */
 371             | IEEE80211_C_PMGT          /* power save supported */
 372             | IEEE80211_C_SHPREAMBLE    /* short preamble supported */
 373             | IEEE80211_C_WPA           /* 802.11i */
 374             | IEEE80211_C_WME           /* 802.11e */
 375 #if 0
 376             | IEEE80211_C_BGSCAN        /* capable of bg scanning */
 377 #endif
 378             ;
 379
 380         /* read MAC address from EEPROM */
 381         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 0);
 382         ic->ic_macaddr[0] = val & 0xff;
 383         ic->ic_macaddr[1] = val >> 8;
 384         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 1);
 385         ic->ic_macaddr[2] = val & 0xff;
 386         ic->ic_macaddr[3] = val >> 8;
 387         val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 2);
 388         ic->ic_macaddr[4] = val & 0xff;
 389         ic->ic_macaddr[5] = val >> 8;
 390
 391         iwi_getradiocaps(ic, IEEE80211_CHAN_MAX, &ic->ic_nchans,
 392             ic->ic_channels);
 393
 394         ieee80211_ifattach(ic);
 395         /* override default methods */
 396         ic->ic_node_alloc = iwi_node_alloc;
 397         sc->sc_node_free = ic->ic_node_free;
 398         ic->ic_node_free = iwi_node_free;
 399         ic->ic_raw_xmit = iwi_raw_xmit;
 400         ic->ic_scan_start = iwi_scan_start;
 401         ic->ic_scan_end = iwi_scan_end;
 402         ic->ic_set_channel = iwi_set_channel;
 403         ic->ic_scan_curchan = iwi_scan_curchan;
 404         ic->ic_scan_mindwell = iwi_scan_mindwell;
 405         ic->ic_wme.wme_update = iwi_wme_update;
 406
 407         ic->ic_vap_create = iwi_vap_create;
 408         ic->ic_vap_delete = iwi_vap_delete;
 409         ic->ic_ioctl = iwi_ioctl;
 410         ic->ic_transmit = iwi_transmit;
 411         ic->ic_parent = iwi_parent;
 412         ic->ic_getradiocaps = iwi_getradiocaps;
 413
 414         ieee80211_radiotap_attach(ic,
 415             &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
 416                 IWI_TX_RADIOTAP_PRESENT,
 417             &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
 418                 IWI_RX_RADIOTAP_PRESENT);
 419
 420         iwi_sysctlattach(sc);
 421         iwi_ledattach(sc);
 422
 423         /*
 424          * Hook our interrupt after all initialization is complete.
 425          */
 426         error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE,
 427             NULL, iwi_intr, sc, &sc->sc_ih);
 428         if (error != 0) {
 429                 device_printf(dev, "could not set up interrupt\n");
 430                 goto fail;
 431         }
 432
 433         if (bootverbose)
 434                 ieee80211_announce(ic);
 435
 436         return 0;
 437 fail:
 438         /* XXX fix */
 439         iwi_detach(dev);
 440         return ENXIO;
 441 }
 442
 443 static int
 444 iwi_detach(device_t dev)
 445 {
 446         struct iwi_softc *sc = device_get_softc(dev);
 447         struct ieee80211com *ic = &sc->sc_ic;
 448
 449         bus_teardown_intr(dev, sc->irq, sc->sc_ih);
 450
 451         /* NB: do early to drain any pending tasks */
 452         ieee80211_draintask(ic, &sc->sc_radiontask);
 453         ieee80211_draintask(ic, &sc->sc_radiofftask);
 454         ieee80211_draintask(ic, &sc->sc_restarttask);
 455         ieee80211_draintask(ic, &sc->sc_disassoctask);
 456         ieee80211_draintask(ic, &sc->sc_monitortask);
 457
 458         iwi_stop(sc);
 459
 460         ieee80211_ifdetach(ic);
 461
 462         iwi_put_firmware(sc);
 463         iwi_release_fw_dma(sc);
 464
 465         iwi_free_cmd_ring(sc, &sc->cmdq);
 466         iwi_free_tx_ring(sc, &sc->txq[0]);
 467         iwi_free_tx_ring(sc, &sc->txq[1]);
 468         iwi_free_tx_ring(sc, &sc->txq[2]);
 469         iwi_free_tx_ring(sc, &sc->txq[3]);
 470         iwi_free_rx_ring(sc, &sc->rxq);
 471
 472         bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq), sc->irq);
 473
 474         bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(sc->mem),
 475             sc->mem);
 476
 477         delete_unrhdr(sc->sc_unr);
 478         mbufq_drain(&sc->sc_snd);
 479
 480         IWI_LOCK_DESTROY(sc);
 481
 482         return 0;
 483 }
 484
 485 static struct ieee80211vap *
 486 iwi_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
 487     enum ieee80211_opmode opmode, int flags,
 488     const uint8_t bssid[IEEE80211_ADDR_LEN],
 489     const uint8_t mac[IEEE80211_ADDR_LEN])
 490 {
 491         struct iwi_softc *sc = ic->ic_softc;
 492         struct iwi_vap *ivp;
 493         struct ieee80211vap *vap;
 494         int i;
 495
 496         if (!TAILQ_EMPTY(&ic->ic_vaps))         /* only one at a time */
 497                 return NULL;
 498         /*
 499          * Get firmware image (and possibly dma memory) on mode change.
 500          */
 501         if (iwi_get_firmware(sc, opmode))
 502                 return NULL;
 503         /* allocate DMA memory for mapping firmware image */
 504         i = sc->fw_fw.size;
 505         if (sc->fw_boot.size > i)
 506                 i = sc->fw_boot.size;
 507         /* XXX do we dma the ucode as well ? */
 508         if (sc->fw_uc.size > i)
 509                 i = sc->fw_uc.size;
 510         if (iwi_init_fw_dma(sc, i))
 511                 return NULL;
 512
 513         ivp = malloc(sizeof(struct iwi_vap), M_80211_VAP, M_WAITOK | M_ZERO);
 514         vap = &ivp->iwi_vap;
 515         ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid);
 516         /* override the default, the setting comes from the linux driver */
 517         vap->iv_bmissthreshold = 24;
 518         /* override with driver methods */
 519         ivp->iwi_newstate = vap->iv_newstate;
 520         vap->iv_newstate = iwi_newstate;
 521
 522         /* complete setup */
 523         ieee80211_vap_attach(vap, ieee80211_media_change, iwi_media_status,
 524             mac);
 525         ic->ic_opmode = opmode;
 526         return vap;
 527 }
 528
 529 static void
 530 iwi_vap_delete(struct ieee80211vap *vap)
 531 {
 532         struct iwi_vap *ivp = IWI_VAP(vap);
 533
 534         ieee80211_vap_detach(vap);
 535         free(ivp, M_80211_VAP);
 536 }
 537
 538 static void
 539 iwi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 540 {
 541         if (error != 0)
 542                 return;
 543
 544         KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
 545
 546         *(bus_addr_t *)arg = segs[0].ds_addr;
 547 }
 548
 549 static int
 550 iwi_alloc_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring, int count)
 551 {
 552         int error;
 553
 554         ring->count = count;
 555         ring->queued = 0;
 556         ring->cur = ring->next = 0;
 557
 558         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
 559             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 560             count * IWI_CMD_DESC_SIZE, 1, count * IWI_CMD_DESC_SIZE, 0,
 561             NULL, NULL, &ring->desc_dmat);
 562         if (error != 0) {
 563                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 564                 goto fail;
 565         }
 566
 567         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 568             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 569         if (error != 0) {
 570                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 571                 goto fail;
 572         }
 573
 574         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 575             count * IWI_CMD_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 576         if (error != 0) {
 577                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 578                 goto fail;
 579         }
 580
 581         return 0;
 582
 583 fail:   iwi_free_cmd_ring(sc, ring);
 584         return error;
 585 }
 586
 587 static void
 588 iwi_reset_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 589 {
 590         ring->queued = 0;
 591         ring->cur = ring->next = 0;
 592 }
 593
 594 static void
 595 iwi_free_cmd_ring(struct iwi_softc *sc, struct iwi_cmd_ring *ring)
 596 {
 597         if (ring->desc != NULL) {
 598                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 599                     BUS_DMASYNC_POSTWRITE);
 600                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 601                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 602         }
 603
 604         if (ring->desc_dmat != NULL)
 605                 bus_dma_tag_destroy(ring->desc_dmat);
 606 }
 607
 608 static int
 609 iwi_alloc_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring, int count,
 610     bus_addr_t csr_ridx, bus_addr_t csr_widx)
 611 {
 612         int i, error;
 613
 614         ring->count = count;
 615         ring->queued = 0;
 616         ring->cur = ring->next = 0;
 617         ring->csr_ridx = csr_ridx;
 618         ring->csr_widx = csr_widx;
 619
 620         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
 621             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 622             count * IWI_TX_DESC_SIZE, 1, count * IWI_TX_DESC_SIZE, 0, NULL,
 623             NULL, &ring->desc_dmat);
 624         if (error != 0) {
 625                 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
 626                 goto fail;
 627         }
 628
 629         error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
 630             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
 631         if (error != 0) {
 632                 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
 633                 goto fail;
 634         }
 635
 636         error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
 637             count * IWI_TX_DESC_SIZE, iwi_dma_map_addr, &ring->physaddr, 0);
 638         if (error != 0) {
 639                 device_printf(sc->sc_dev, "could not load desc DMA map\n");
 640                 goto fail;
 641         }
 642
 643         ring->data = malloc(count * sizeof (struct iwi_tx_data), M_DEVBUF,
 644             M_NOWAIT | M_ZERO);
 645         if (ring->data == NULL) {
 646                 device_printf(sc->sc_dev, "could not allocate soft data\n");
 647                 error = ENOMEM;
 648                 goto fail;
 649         }
 650
 651         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
 652         BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
 653         IWI_MAX_NSEG, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
 654         if (error != 0) {
 655                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 656                 goto fail;
 657         }
 658
 659         for (i = 0; i < count; i++) {
 660                 error = bus_dmamap_create(ring->data_dmat, 0,
 661                     &ring->data[i].map);
 662                 if (error != 0) {
 663                         device_printf(sc->sc_dev, "could not create DMA map\n");
 664                         goto fail;
 665                 }
 666         }
 667
 668         return 0;
 669
 670 fail:   iwi_free_tx_ring(sc, ring);
 671         return error;
 672 }
 673
 674 static void
 675 iwi_reset_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 676 {
 677         struct iwi_tx_data *data;
 678         int i;
 679
 680         for (i = 0; i < ring->count; i++) {
 681                 data = &ring->data[i];
 682
 683                 if (data->m != NULL) {
 684                         bus_dmamap_sync(ring->data_dmat, data->map,
 685                             BUS_DMASYNC_POSTWRITE);
 686                         bus_dmamap_unload(ring->data_dmat, data->map);
 687                         m_freem(data->m);
 688                         data->m = NULL;
 689                 }
 690
 691                 if (data->ni != NULL) {
 692                         ieee80211_free_node(data->ni);
 693                         data->ni = NULL;
 694                 }
 695         }
 696
 697         ring->queued = 0;
 698         ring->cur = ring->next = 0;
 699 }
 700
 701 static void
 702 iwi_free_tx_ring(struct iwi_softc *sc, struct iwi_tx_ring *ring)
 703 {
 704         struct iwi_tx_data *data;
 705         int i;
 706
 707         if (ring->desc != NULL) {
 708                 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
 709                     BUS_DMASYNC_POSTWRITE);
 710                 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
 711                 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
 712         }
 713
 714         if (ring->desc_dmat != NULL)
 715                 bus_dma_tag_destroy(ring->desc_dmat);
 716
 717         if (ring->data != NULL) {
 718                 for (i = 0; i < ring->count; i++) {
 719                         data = &ring->data[i];
 720
 721                         if (data->m != NULL) {
 722                                 bus_dmamap_sync(ring->data_dmat, data->map,
 723                                     BUS_DMASYNC_POSTWRITE);
 724                                 bus_dmamap_unload(ring->data_dmat, data->map);
 725                                 m_freem(data->m);
 726                         }
 727
 728                         if (data->ni != NULL)
 729                                 ieee80211_free_node(data->ni);
 730
 731                         if (data->map != NULL)
 732                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 733                 }
 734
 735                 free(ring->data, M_DEVBUF);
 736         }
 737
 738         if (ring->data_dmat != NULL)
 739                 bus_dma_tag_destroy(ring->data_dmat);
 740 }
 741
 742 static int
 743 iwi_alloc_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring, int count)
 744 {
 745         struct iwi_rx_data *data;
 746         int i, error;
 747
 748         ring->count = count;
 749         ring->cur = 0;
 750
 751         ring->data = malloc(count * sizeof (struct iwi_rx_data), M_DEVBUF,
 752             M_NOWAIT | M_ZERO);
 753         if (ring->data == NULL) {
 754                 device_printf(sc->sc_dev, "could not allocate soft data\n");
 755                 error = ENOMEM;
 756                 goto fail;
 757         }
 758
 759         error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
 760             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
 761             1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
 762         if (error != 0) {
 763                 device_printf(sc->sc_dev, "could not create data DMA tag\n");
 764                 goto fail;
 765         }
 766
 767         for (i = 0; i < count; i++) {
 768                 data = &ring->data[i];
 769
 770                 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
 771                 if (error != 0) {
 772                         device_printf(sc->sc_dev, "could not create DMA map\n");
 773                         goto fail;
 774                 }
 775
 776                 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
 777                 if (data->m == NULL) {
 778                         device_printf(sc->sc_dev,
 779                             "could not allocate rx mbuf\n");
 780                         error = ENOMEM;
 781                         goto fail;
 782                 }
 783
 784                 error = bus_dmamap_load(ring->data_dmat, data->map,
 785                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
 786                     &data->physaddr, 0);
 787                 if (error != 0) {
 788                         device_printf(sc->sc_dev,
 789                             "could not load rx buf DMA map");
 790                         goto fail;
 791                 }
 792
 793                 data->reg = IWI_CSR_RX_BASE + i * 4;
 794         }
 795
 796         return 0;
 797
 798 fail:   iwi_free_rx_ring(sc, ring);
 799         return error;
 800 }
 801
 802 static void
 803 iwi_reset_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 804 {
 805         ring->cur = 0;
 806 }
 807
 808 static void
 809 iwi_free_rx_ring(struct iwi_softc *sc, struct iwi_rx_ring *ring)
 810 {
 811         struct iwi_rx_data *data;
 812         int i;
 813
 814         if (ring->data != NULL) {
 815                 for (i = 0; i < ring->count; i++) {
 816                         data = &ring->data[i];
 817
 818                         if (data->m != NULL) {
 819                                 bus_dmamap_sync(ring->data_dmat, data->map,
 820                                     BUS_DMASYNC_POSTREAD);
 821                                 bus_dmamap_unload(ring->data_dmat, data->map);
 822                                 m_freem(data->m);
 823                         }
 824
 825                         if (data->map != NULL)
 826                                 bus_dmamap_destroy(ring->data_dmat, data->map);
 827                 }
 828
 829                 free(ring->data, M_DEVBUF);
 830         }
 831
 832         if (ring->data_dmat != NULL)
 833                 bus_dma_tag_destroy(ring->data_dmat);
 834 }
 835
 836 static int
 837 iwi_shutdown(device_t dev)
 838 {
 839         struct iwi_softc *sc = device_get_softc(dev);
 840
 841         iwi_stop(sc);
 842         iwi_put_firmware(sc);           /* ??? XXX */
 843
 844         return 0;
 845 }
 846
 847 static int
 848 iwi_suspend(device_t dev)
 849 {
 850         struct iwi_softc *sc = device_get_softc(dev);
 851         struct ieee80211com *ic = &sc->sc_ic;
 852
 853         ieee80211_suspend_all(ic);
 854         return 0;
 855 }
 856
 857 static int
 858 iwi_resume(device_t dev)
 859 {
 860         struct iwi_softc *sc = device_get_softc(dev);
 861         struct ieee80211com *ic = &sc->sc_ic;
 862
 863         pci_write_config(dev, 0x41, 0, 1);
 864
 865         ieee80211_resume_all(ic);
 866         return 0;
 867 }
 868
 869 static struct ieee80211_node *
 870 iwi_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN])
 871 {
 872         struct iwi_node *in;
 873
 874         in = malloc(sizeof (struct iwi_node), M_80211_NODE, M_NOWAIT | M_ZERO);
 875         if (in == NULL)
 876                 return NULL;
 877         /* XXX assign sta table entry for adhoc */
 878         in->in_station = -1;
 879
 880         return &in->in_node;
 881 }
 882
 883 static void
 884 iwi_node_free(struct ieee80211_node *ni)
 885 {
 886         struct ieee80211com *ic = ni->ni_ic;
 887         struct iwi_softc *sc = ic->ic_softc;
 888         struct iwi_node *in = (struct iwi_node *)ni;
 889
 890         if (in->in_station != -1) {
 891                 DPRINTF(("%s mac %6D station %u\n", __func__,
 892                     ni->ni_macaddr, ":", in->in_station));
 893                 free_unr(sc->sc_unr, in->in_station);
 894         }
 895
 896         sc->sc_node_free(ni);
 897 }
 898
 899 /*
 900  * Convert h/w rate code to IEEE rate code.
 901  */
 902 static int
 903 iwi_cvtrate(int iwirate)
 904 {
 905         switch (iwirate) {
 906         case IWI_RATE_DS1:      return 2;
 907         case IWI_RATE_DS2:      return 4;
 908         case IWI_RATE_DS5:      return 11;
 909         case IWI_RATE_DS11:     return 22;
 910         case IWI_RATE_OFDM6:    return 12;
 911         case IWI_RATE_OFDM9:    return 18;
 912         case IWI_RATE_OFDM12:   return 24;
 913         case IWI_RATE_OFDM18:   return 36;
 914         case IWI_RATE_OFDM24:   return 48;
 915         case IWI_RATE_OFDM36:   return 72;
 916         case IWI_RATE_OFDM48:   return 96;
 917         case IWI_RATE_OFDM54:   return 108;
 918         }
 919         return 0;
 920 }
 921
 922 /*
 923  * The firmware automatically adapts the transmit speed.  We report its current
 924  * value here.
 925  */
 926 static void
 927 iwi_media_status(struct ifnet *ifp, struct ifmediareq *imr)
 928 {
 929         struct ieee80211vap *vap = ifp->if_softc;
 930         struct ieee80211com *ic = vap->iv_ic;
 931         struct iwi_softc *sc = ic->ic_softc;
 932         struct ieee80211_node *ni;
 933
 934         /* read current transmission rate from adapter */
 935         ni = ieee80211_ref_node(vap->iv_bss);
 936         ni->ni_txrate =
 937             iwi_cvtrate(CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE));
 938         ieee80211_free_node(ni);
 939         ieee80211_media_status(ifp, imr);
 940 }
 941
 942 static int
 943 iwi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 944 {
 945         struct iwi_vap *ivp = IWI_VAP(vap);
 946         struct ieee80211com *ic = vap->iv_ic;
 947         struct iwi_softc *sc = ic->ic_softc;
 948         IWI_LOCK_DECL;
 949
 950         DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__,
 951                 ieee80211_state_name[vap->iv_state],
 952                 ieee80211_state_name[nstate], sc->flags));
 953
 954         IEEE80211_UNLOCK(ic);
 955         IWI_LOCK(sc);
 956         switch (nstate) {
 957         case IEEE80211_S_INIT:
 958                 /*
 959                  * NB: don't try to do this if iwi_stop_master has
 960                  *     shutdown the firmware and disabled interrupts.
 961                  */
 962                 if (vap->iv_state == IEEE80211_S_RUN &&
 963                     (sc->flags & IWI_FLAG_FW_INITED))
 964                         iwi_disassociate(sc, 0);
 965                 break;
 966         case IEEE80211_S_AUTH:
 967                 iwi_auth_and_assoc(sc, vap);
 968                 break;
 969         case IEEE80211_S_RUN:
 970                 if (vap->iv_opmode == IEEE80211_M_IBSS &&
 971                     vap->iv_state == IEEE80211_S_SCAN) {
 972                         /*
 973                          * XXX when joining an ibss network we are called
 974                          * with a SCAN -> RUN transition on scan complete.
 975                          * Use that to call iwi_auth_and_assoc.  On completing
 976                          * the join we are then called again with an
 977                          * AUTH -> RUN transition and we want to do nothing.
 978                          * This is all totally bogus and needs to be redone.
 979                          */
 980                         iwi_auth_and_assoc(sc, vap);
 981                 } else if (vap->iv_opmode == IEEE80211_M_MONITOR)
 982                         ieee80211_runtask(ic, &sc->sc_monitortask);
 983                 break;
 984         case IEEE80211_S_ASSOC:
 985                 /*
 986                  * If we are transitioning from AUTH then just wait
 987                  * for the ASSOC status to come back from the firmware.
 988                  * Otherwise we need to issue the association request.
 989                  */
 990                 if (vap->iv_state == IEEE80211_S_AUTH)
 991                         break;
 992                 iwi_auth_and_assoc(sc, vap);
 993                 break;
 994         default:
 995                 break;
 996         }
 997         IWI_UNLOCK(sc);
 998         IEEE80211_LOCK(ic);
 999         return ivp->iwi_newstate(vap, nstate, arg);
1000 }
1001
1002 /*
1003  * WME parameters coming from IEEE 802.11e specification.  These values are
1004  * already declared in ieee80211_proto.c, but they are static so they can't
1005  * be reused here.
1006  */
1007 static const struct wmeParams iwi_wme_cck_params[WME_NUM_AC] = {
1008         { 0, 3, 5,  7,   0 },   /* WME_AC_BE */
1009         { 0, 3, 5, 10,   0 },   /* WME_AC_BK */
1010         { 0, 2, 4,  5, 188 },   /* WME_AC_VI */
1011         { 0, 2, 3,  4, 102 }    /* WME_AC_VO */
1012 };
1013
1014 static const struct wmeParams iwi_wme_ofdm_params[WME_NUM_AC] = {
1015         { 0, 3, 4,  6,   0 },   /* WME_AC_BE */
1016         { 0, 3, 4, 10,   0 },   /* WME_AC_BK */
1017         { 0, 2, 3,  4,  94 },   /* WME_AC_VI */
1018         { 0, 2, 2,  3,  47 }    /* WME_AC_VO */
1019 };
1020 #define IWI_EXP2(v)     htole16((1 << (v)) - 1)
1021 #define IWI_USEC(v)     htole16(IEEE80211_TXOP_TO_US(v))
1022
1023 static void
1024 iwi_wme_init(struct iwi_softc *sc)
1025 {
1026         const struct wmeParams *wmep;
1027         int ac;
1028
1029         memset(sc->wme, 0, sizeof sc->wme);
1030         for (ac = 0; ac < WME_NUM_AC; ac++) {
1031                 /* set WME values for CCK modulation */
1032                 wmep = &iwi_wme_cck_params[ac];
1033                 sc->wme[1].aifsn[ac] = wmep->wmep_aifsn;
1034                 sc->wme[1].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1035                 sc->wme[1].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1036                 sc->wme[1].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1037                 sc->wme[1].acm[ac]   = wmep->wmep_acm;
1038
1039                 /* set WME values for OFDM modulation */
1040                 wmep = &iwi_wme_ofdm_params[ac];
1041                 sc->wme[2].aifsn[ac] = wmep->wmep_aifsn;
1042                 sc->wme[2].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1043                 sc->wme[2].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1044                 sc->wme[2].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1045                 sc->wme[2].acm[ac]   = wmep->wmep_acm;
1046         }
1047 }
1048
1049 static int
1050 iwi_wme_setparams(struct iwi_softc *sc)
1051 {
1052         struct ieee80211com *ic = &sc->sc_ic;
1053         struct chanAccParams chp;
1054         const struct wmeParams *wmep;
1055         int ac;
1056
1057         ieee80211_wme_ic_getparams(ic, &chp);
1058
1059         for (ac = 0; ac < WME_NUM_AC; ac++) {
1060                 /* set WME values for current operating mode */
1061                 wmep = &chp.cap_wmeParams[ac];
1062                 sc->wme[0].aifsn[ac] = wmep->wmep_aifsn;
1063                 sc->wme[0].cwmin[ac] = IWI_EXP2(wmep->wmep_logcwmin);
1064                 sc->wme[0].cwmax[ac] = IWI_EXP2(wmep->wmep_logcwmax);
1065                 sc->wme[0].burst[ac] = IWI_USEC(wmep->wmep_txopLimit);
1066                 sc->wme[0].acm[ac]   = wmep->wmep_acm;
1067         }
1068
1069         DPRINTF(("Setting WME parameters\n"));
1070         return iwi_cmd(sc, IWI_CMD_SET_WME_PARAMS, sc->wme, sizeof sc->wme);
1071 }
1072 #undef IWI_USEC
1073 #undef IWI_EXP2
1074
1075 static int
1076 iwi_wme_update(struct ieee80211com *ic)
1077 {
1078         struct iwi_softc *sc = ic->ic_softc;
1079         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1080         IWI_LOCK_DECL;
1081
1082         /*
1083          * We may be called to update the WME parameters in
1084          * the adapter at various places.  If we're already
1085          * associated then initiate the request immediately;
1086          * otherwise we assume the params will get sent down
1087          * to the adapter as part of the work iwi_auth_and_assoc
1088          * does.
1089          */
1090         if (vap->iv_state == IEEE80211_S_RUN) {
1091                 IWI_LOCK(sc);
1092                 iwi_wme_setparams(sc);
1093                 IWI_UNLOCK(sc);
1094         }
1095         return (0);
1096 }
1097
1098 static int
1099 iwi_wme_setie(struct iwi_softc *sc)
1100 {
1101         struct ieee80211_wme_info wme;
1102
1103         memset(&wme, 0, sizeof wme);
1104         wme.wme_id = IEEE80211_ELEMID_VENDOR;
1105         wme.wme_len = sizeof (struct ieee80211_wme_info) - 2;
1106         wme.wme_oui[0] = 0x00;
1107         wme.wme_oui[1] = 0x50;
1108         wme.wme_oui[2] = 0xf2;
1109         wme.wme_type = WME_OUI_TYPE;
1110         wme.wme_subtype = WME_INFO_OUI_SUBTYPE;
1111         wme.wme_version = WME_VERSION;
1112         wme.wme_info = 0;
1113
1114         DPRINTF(("Setting WME IE (len=%u)\n", wme.wme_len));
1115         return iwi_cmd(sc, IWI_CMD_SET_WMEIE, &wme, sizeof wme);
1116 }
1117
1118 /*
1119  * Read 16 bits at address 'addr' from the serial EEPROM.
1120  */
1121 static uint16_t
1122 iwi_read_prom_word(struct iwi_softc *sc, uint8_t addr)
1123 {
1124         uint32_t tmp;
1125         uint16_t val;
1126         int n;
1127
1128         /* clock C once before the first command */
1129         IWI_EEPROM_CTL(sc, 0);
1130         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1131         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1132         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1133
1134         /* write start bit (1) */
1135         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1136         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1137
1138         /* write READ opcode (10) */
1139         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D);
1140         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_D | IWI_EEPROM_C);
1141         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1142         IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1143
1144         /* write address A7-A0 */
1145         for (n = 7; n >= 0; n--) {
1146                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1147                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D));
1148                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S |
1149                     (((addr >> n) & 1) << IWI_EEPROM_SHIFT_D) | IWI_EEPROM_C);
1150         }
1151
1152         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1153
1154         /* read data Q15-Q0 */
1155         val = 0;
1156         for (n = 15; n >= 0; n--) {
1157                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S | IWI_EEPROM_C);
1158                 IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1159                 tmp = MEM_READ_4(sc, IWI_MEM_EEPROM_CTL);
1160                 val |= ((tmp & IWI_EEPROM_Q) >> IWI_EEPROM_SHIFT_Q) << n;
1161         }
1162
1163         IWI_EEPROM_CTL(sc, 0);
1164
1165         /* clear Chip Select and clock C */
1166         IWI_EEPROM_CTL(sc, IWI_EEPROM_S);
1167         IWI_EEPROM_CTL(sc, 0);
1168         IWI_EEPROM_CTL(sc, IWI_EEPROM_C);
1169
1170         return val;
1171 }
1172
1173 static void
1174 iwi_setcurchan(struct iwi_softc *sc, int chan)
1175 {
1176         struct ieee80211com *ic = &sc->sc_ic;
1177
1178         sc->curchan = chan;
1179         ieee80211_radiotap_chan_change(ic);
1180 }
1181
1182 static void
1183 iwi_frame_intr(struct iwi_softc *sc, struct iwi_rx_data *data, int i,
1184     struct iwi_frame *frame)
1185 {
1186         struct ieee80211com *ic = &sc->sc_ic;
1187         struct mbuf *mnew, *m;
1188         struct ieee80211_node *ni;
1189         int type, error, framelen;
1190         int8_t rssi, nf;
1191         IWI_LOCK_DECL;
1192
1193         framelen = le16toh(frame->len);
1194         if (framelen < IEEE80211_MIN_LEN || framelen > MCLBYTES) {
1195                 /*
1196                  * XXX >MCLBYTES is bogus as it means the h/w dma'd
1197                  *     out of bounds; need to figure out how to limit
1198                  *     frame size in the firmware
1199                  */
1200                 /* XXX stat */
1201                 DPRINTFN(1,
1202                     ("drop rx frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1203                     le16toh(frame->len), frame->chan, frame->rssi,
1204                     frame->rssi_dbm));
1205                 return;
1206         }
1207
1208         DPRINTFN(5, ("received frame len=%u chan=%u rssi=%u rssi_dbm=%u\n",
1209             le16toh(frame->len), frame->chan, frame->rssi, frame->rssi_dbm));
1210
1211         if (frame->chan != sc->curchan)
1212                 iwi_setcurchan(sc, frame->chan);
1213
1214         /*
1215          * Try to allocate a new mbuf for this ring element and load it before
1216          * processing the current mbuf. If the ring element cannot be loaded,
1217          * drop the received packet and reuse the old mbuf. In the unlikely
1218          * case that the old mbuf can't be reloaded either, explicitly panic.
1219          */
1220         mnew = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
1221         if (mnew == NULL) {
1222                 counter_u64_add(ic->ic_ierrors, 1);
1223                 return;
1224         }
1225
1226         bus_dmamap_unload(sc->rxq.data_dmat, data->map);
1227
1228         error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1229             mtod(mnew, void *), MCLBYTES, iwi_dma_map_addr, &data->physaddr,
1230             0);
1231         if (error != 0) {
1232                 m_freem(mnew);
1233
1234                 /* try to reload the old mbuf */
1235                 error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1236                     mtod(data->m, void *), MCLBYTES, iwi_dma_map_addr,
1237                     &data->physaddr, 0);
1238                 if (error != 0) {
1239                         /* very unlikely that it will fail... */
1240                         panic("%s: could not load old rx mbuf",
1241                             device_get_name(sc->sc_dev));
1242                 }
1243                 counter_u64_add(ic->ic_ierrors, 1);
1244                 return;
1245         }
1246
1247         /*
1248          * New mbuf successfully loaded, update Rx ring and continue
1249          * processing.
1250          */
1251         m = data->m;
1252         data->m = mnew;
1253         CSR_WRITE_4(sc, data->reg, data->physaddr);
1254
1255         /* finalize mbuf */
1256         m->m_pkthdr.len = m->m_len = sizeof (struct iwi_hdr) +
1257             sizeof (struct iwi_frame) + framelen;
1258
1259         m_adj(m, sizeof (struct iwi_hdr) + sizeof (struct iwi_frame));
1260
1261         rssi = frame->rssi_dbm;
1262         nf = -95;
1263         if (ieee80211_radiotap_active(ic)) {
1264                 struct iwi_rx_radiotap_header *tap = &sc->sc_rxtap;
1265
1266                 tap->wr_flags = 0;
1267                 tap->wr_antsignal = rssi;
1268                 tap->wr_antnoise = nf;
1269                 tap->wr_rate = iwi_cvtrate(frame->rate);
1270                 tap->wr_antenna = frame->antenna;
1271         }
1272         IWI_UNLOCK(sc);
1273
1274         ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *));
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
1281         IWI_LOCK(sc);
1282         if (sc->sc_softled) {
1283                 /*
1284                  * Blink for any data frame.  Otherwise do a
1285                  * heartbeat-style blink when idle.  The latter
1286                  * is mainly for station mode where we depend on
1287                  * periodic beacon frames to trigger the poll event.
1288                  */
1289                 if (type == IEEE80211_FC0_TYPE_DATA) {
1290                         sc->sc_rxrate = frame->rate;
1291                         iwi_led_event(sc, IWI_LED_RX);
1292                 } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle)
1293                         iwi_led_event(sc, IWI_LED_POLL);
1294         }
1295 }
1296
1297 /*
1298  * Check for an association response frame to see if QoS
1299  * has been negotiated.  We parse just enough to figure
1300  * out if we're supposed to use QoS.  The proper solution
1301  * is to pass the frame up so ieee80211_input can do the
1302  * work but that's made hard by how things currently are
1303  * done in the driver.
1304  */
1305 static void
1306 iwi_checkforqos(struct ieee80211vap *vap,
1307         const struct ieee80211_frame *wh, int len)
1308 {
1309 #define SUBTYPE(wh)     ((wh)->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
1310         const uint8_t *frm, *efrm, *wme;
1311         struct ieee80211_node *ni;
1312         uint16_t capinfo, status, associd;
1313
1314         /* NB: +8 for capinfo, status, associd, and first ie */
1315         if (!(sizeof(*wh)+8 < len && len < IEEE80211_MAX_LEN) ||
1316             SUBTYPE(wh) != IEEE80211_FC0_SUBTYPE_ASSOC_RESP)
1317                 return;
1318         /*
1319          * asresp frame format
1320          *      [2] capability information
1321          *      [2] status
1322          *      [2] association ID
1323          *      [tlv] supported rates
1324          *      [tlv] extended supported rates
1325          *      [tlv] WME
1326          */
1327         frm = (const uint8_t *)&wh[1];
1328         efrm = ((const uint8_t *) wh) + len;
1329
1330         capinfo = le16toh(*(const uint16_t *)frm);
1331         frm += 2;
1332         status = le16toh(*(const uint16_t *)frm);
1333         frm += 2;
1334         associd = le16toh(*(const uint16_t *)frm);
1335         frm += 2;
1336
1337         wme = NULL;
1338         while (efrm - frm > 1) {
1339                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1340                 switch (*frm) {
1341                 case IEEE80211_ELEMID_VENDOR:
1342                         if (iswmeoui(frm))
1343                                 wme = frm;
1344                         break;
1345                 }
1346                 frm += frm[1] + 2;
1347         }
1348
1349         ni = ieee80211_ref_node(vap->iv_bss);
1350         ni->ni_capinfo = capinfo;
1351         ni->ni_associd = associd & 0x3fff;
1352         if (wme != NULL)
1353                 ni->ni_flags |= IEEE80211_NODE_QOS;
1354         else
1355                 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1356         ieee80211_free_node(ni);
1357 #undef SUBTYPE
1358 }
1359
1360 static void
1361 iwi_notif_link_quality(struct iwi_softc *sc, struct iwi_notif *notif)
1362 {
1363         struct iwi_notif_link_quality *lq;
1364         int len;
1365
1366         len = le16toh(notif->len);
1367
1368         DPRINTFN(5, ("Notification (%u) - len=%d, sizeof=%zu\n",
1369             notif->type,
1370             len,
1371             sizeof(struct iwi_notif_link_quality)
1372             ));
1373
1374         /* enforce length */
1375         if (len != sizeof(struct iwi_notif_link_quality)) {
1376                 DPRINTFN(5, ("Notification: (%u) too short (%d)\n",
1377                     notif->type,
1378                     len));
1379                 return;
1380         }
1381
1382         lq = (struct iwi_notif_link_quality *)(notif + 1);
1383         memcpy(&sc->sc_linkqual, lq, sizeof(sc->sc_linkqual));
1384         sc->sc_linkqual_valid = 1;
1385 }
1386
1387 /*
1388  * Task queue callbacks for iwi_notification_intr used to avoid LOR's.
1389  */
1390
1391 static void
1392 iwi_notification_intr(struct iwi_softc *sc, struct iwi_notif *notif)
1393 {
1394         struct ieee80211com *ic = &sc->sc_ic;
1395         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1396         struct iwi_notif_scan_channel *chan;
1397         struct iwi_notif_scan_complete *scan;
1398         struct iwi_notif_authentication *auth;
1399         struct iwi_notif_association *assoc;
1400         struct iwi_notif_beacon_state *beacon;
1401
1402         switch (notif->type) {
1403         case IWI_NOTIF_TYPE_SCAN_CHANNEL:
1404                 chan = (struct iwi_notif_scan_channel *)(notif + 1);
1405
1406                 DPRINTFN(3, ("Scan of channel %u complete (%u)\n",
1407                     ieee80211_ieee2mhz(chan->nchan, 0), chan->nchan));
1408
1409                 /* Reset the timer, the scan is still going */
1410                 sc->sc_state_timer = 3;
1411                 break;
1412
1413         case IWI_NOTIF_TYPE_SCAN_COMPLETE:
1414                 scan = (struct iwi_notif_scan_complete *)(notif + 1);
1415
1416                 DPRINTFN(2, ("Scan completed (%u, %u)\n", scan->nchan,
1417                     scan->status));
1418
1419                 IWI_STATE_END(sc, IWI_FW_SCANNING);
1420
1421                 /*
1422                  * Monitor mode works by doing a passive scan to set
1423                  * the channel and enable rx.  Because we don't want
1424                  * to abort a scan lest the firmware crash we scan
1425                  * for a short period of time and automatically restart
1426                  * the scan when notified the sweep has completed.
1427                  */
1428                 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
1429                         ieee80211_runtask(ic, &sc->sc_monitortask);
1430                         break;
1431                 }
1432
1433                 if (scan->status == IWI_SCAN_COMPLETED) {
1434                         /* NB: don't need to defer, net80211 does it for us */
1435                         ieee80211_scan_next(vap);
1436                 }
1437                 break;
1438
1439         case IWI_NOTIF_TYPE_AUTHENTICATION:
1440                 auth = (struct iwi_notif_authentication *)(notif + 1);
1441                 switch (auth->state) {
1442                 case IWI_AUTH_SUCCESS:
1443                         DPRINTFN(2, ("Authentication succeeeded\n"));
1444                         ieee80211_new_state(vap, IEEE80211_S_ASSOC, -1);
1445                         break;
1446                 case IWI_AUTH_FAIL:
1447                         /*
1448                          * These are delivered as an unsolicited deauth
1449                          * (e.g. due to inactivity) or in response to an
1450                          * associate request.
1451                          */
1452                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1453                         if (vap->iv_state != IEEE80211_S_RUN) {
1454                                 DPRINTFN(2, ("Authentication failed\n"));
1455                                 vap->iv_stats.is_rx_auth_fail++;
1456                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1457                         } else {
1458                                 DPRINTFN(2, ("Deauthenticated\n"));
1459                                 vap->iv_stats.is_rx_deauth++;
1460                         }
1461                         ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1462                         break;
1463                 case IWI_AUTH_SENT_1:
1464                 case IWI_AUTH_RECV_2:
1465                 case IWI_AUTH_SEQ1_PASS:
1466                         break;
1467                 case IWI_AUTH_SEQ1_FAIL:
1468                         DPRINTFN(2, ("Initial authentication handshake failed; "
1469                                 "you probably need shared key\n"));
1470                         vap->iv_stats.is_rx_auth_fail++;
1471                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1472                         /* XXX retry shared key when in auto */
1473                         break;
1474                 default:
1475                         device_printf(sc->sc_dev,
1476                             "unknown authentication state %u\n", auth->state);
1477                         break;
1478                 }
1479                 break;
1480
1481         case IWI_NOTIF_TYPE_ASSOCIATION:
1482                 assoc = (struct iwi_notif_association *)(notif + 1);
1483                 switch (assoc->state) {
1484                 case IWI_AUTH_SUCCESS:
1485                         /* re-association, do nothing */
1486                         break;
1487                 case IWI_ASSOC_SUCCESS:
1488                         DPRINTFN(2, ("Association succeeded\n"));
1489                         sc->flags |= IWI_FLAG_ASSOCIATED;
1490                         IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1491                         iwi_checkforqos(vap,
1492                             (const struct ieee80211_frame *)(assoc+1),
1493                             le16toh(notif->len) - sizeof(*assoc) - 1);
1494                         ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
1495                         break;
1496                 case IWI_ASSOC_INIT:
1497                         sc->flags &= ~IWI_FLAG_ASSOCIATED;
1498                         switch (sc->fw_state) {
1499                         case IWI_FW_ASSOCIATING:
1500                                 DPRINTFN(2, ("Association failed\n"));
1501                                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
1502                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1503                                 break;
1504
1505                         case IWI_FW_DISASSOCIATING:
1506                                 DPRINTFN(2, ("Dissassociated\n"));
1507                                 IWI_STATE_END(sc, IWI_FW_DISASSOCIATING);
1508                                 vap->iv_stats.is_rx_disassoc++;
1509                                 ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
1510                                 break;
1511                         }
1512                         break;
1513                 default:
1514                         device_printf(sc->sc_dev,
1515                             "unknown association state %u\n", assoc->state);
1516                         break;
1517                 }
1518                 break;
1519
1520         case IWI_NOTIF_TYPE_BEACON:
1521                 /* XXX check struct length */
1522                 beacon = (struct iwi_notif_beacon_state *)(notif + 1);
1523
1524                 DPRINTFN(5, ("Beacon state (%u, %u)\n",
1525                     beacon->state, le32toh(beacon->number)));
1526
1527                 if (beacon->state == IWI_BEACON_MISS) {
1528                         /*
1529                          * The firmware notifies us of every beacon miss
1530                          * so we need to track the count against the
1531                          * configured threshold before notifying the
1532                          * 802.11 layer.
1533                          * XXX try to roam, drop assoc only on much higher count
1534                          */
1535                         if (le32toh(beacon->number) >= vap->iv_bmissthreshold) {
1536                                 DPRINTF(("Beacon miss: %u >= %u\n",
1537                                     le32toh(beacon->number),
1538                                     vap->iv_bmissthreshold));
1539                                 vap->iv_stats.is_beacon_miss++;
1540                                 /*
1541                                  * It's pointless to notify the 802.11 layer
1542                                  * as it'll try to send a probe request (which
1543                                  * we'll discard) and then timeout and drop us
1544                                  * into scan state.  Instead tell the firmware
1545                                  * to disassociate and then on completion we'll
1546                                  * kick the state machine to scan.
1547                                  */
1548                                 ieee80211_runtask(ic, &sc->sc_disassoctask);
1549                         }
1550                 }
1551                 break;
1552
1553         case IWI_NOTIF_TYPE_CALIBRATION:
1554         case IWI_NOTIF_TYPE_NOISE:
1555                 /* XXX handle? */
1556                 DPRINTFN(5, ("Notification (%u)\n", notif->type));
1557                 break;
1558         case IWI_NOTIF_TYPE_LINK_QUALITY:
1559                 iwi_notif_link_quality(sc, notif);
1560                 break;
1561
1562         default:
1563                 DPRINTF(("unknown notification type %u flags 0x%x len %u\n",
1564                     notif->type, notif->flags, le16toh(notif->len)));
1565                 break;
1566         }
1567 }
1568
1569 static void
1570 iwi_rx_intr(struct iwi_softc *sc)
1571 {
1572         struct iwi_rx_data *data;
1573         struct iwi_hdr *hdr;
1574         uint32_t hw;
1575
1576         hw = CSR_READ_4(sc, IWI_CSR_RX_RIDX);
1577
1578         for (; sc->rxq.cur != hw;) {
1579                 data = &sc->rxq.data[sc->rxq.cur];
1580
1581                 bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1582                     BUS_DMASYNC_POSTREAD);
1583
1584                 hdr = mtod(data->m, struct iwi_hdr *);
1585
1586                 switch (hdr->type) {
1587                 case IWI_HDR_TYPE_FRAME:
1588                         iwi_frame_intr(sc, data, sc->rxq.cur,
1589                             (struct iwi_frame *)(hdr + 1));
1590                         break;
1591
1592                 case IWI_HDR_TYPE_NOTIF:
1593                         iwi_notification_intr(sc,
1594                             (struct iwi_notif *)(hdr + 1));
1595                         break;
1596
1597                 default:
1598                         device_printf(sc->sc_dev, "unknown hdr type %u\n",
1599                             hdr->type);
1600                 }
1601
1602                 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur));
1603
1604                 sc->rxq.cur = (sc->rxq.cur + 1) % IWI_RX_RING_COUNT;
1605         }
1606
1607         /* tell the firmware what we have processed */
1608         hw = (hw == 0) ? IWI_RX_RING_COUNT - 1 : hw - 1;
1609         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, hw);
1610 }
1611
1612 static void
1613 iwi_tx_intr(struct iwi_softc *sc, struct iwi_tx_ring *txq)
1614 {
1615         struct iwi_tx_data *data;
1616         uint32_t hw;
1617
1618         hw = CSR_READ_4(sc, txq->csr_ridx);
1619
1620         while (txq->next != hw) {
1621                 data = &txq->data[txq->next];
1622                 DPRINTFN(15, ("tx done idx=%u\n", txq->next));
1623                 bus_dmamap_sync(txq->data_dmat, data->map,
1624                     BUS_DMASYNC_POSTWRITE);
1625                 bus_dmamap_unload(txq->data_dmat, data->map);
1626                 ieee80211_tx_complete(data->ni, data->m, 0);
1627                 data->ni = NULL;
1628                 data->m = NULL;
1629                 txq->queued--;
1630                 txq->next = (txq->next + 1) % IWI_TX_RING_COUNT;
1631         }
1632         sc->sc_tx_timer = 0;
1633         if (sc->sc_softled)
1634                 iwi_led_event(sc, IWI_LED_TX);
1635         iwi_start(sc);
1636 }
1637
1638 static void
1639 iwi_fatal_error_intr(struct iwi_softc *sc)
1640 {
1641         struct ieee80211com *ic = &sc->sc_ic;
1642         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1643
1644         device_printf(sc->sc_dev, "firmware error\n");
1645         if (vap != NULL)
1646                 ieee80211_cancel_scan(vap);
1647         ieee80211_runtask(ic, &sc->sc_restarttask);
1648
1649         sc->flags &= ~IWI_FLAG_BUSY;
1650         sc->sc_busy_timer = 0;
1651         wakeup(sc);
1652 }
1653
1654 static void
1655 iwi_radio_off_intr(struct iwi_softc *sc)
1656 {
1657
1658         ieee80211_runtask(&sc->sc_ic, &sc->sc_radiofftask);
1659 }
1660
1661 static void
1662 iwi_intr(void *arg)
1663 {
1664         struct iwi_softc *sc = arg;
1665         uint32_t r;
1666         IWI_LOCK_DECL;
1667
1668         IWI_LOCK(sc);
1669
1670         if ((r = CSR_READ_4(sc, IWI_CSR_INTR)) == 0 || r == 0xffffffff) {
1671                 IWI_UNLOCK(sc);
1672                 return;
1673         }
1674
1675         /* acknowledge interrupts */
1676         CSR_WRITE_4(sc, IWI_CSR_INTR, r);
1677
1678         if (r & IWI_INTR_FATAL_ERROR) {
1679                 iwi_fatal_error_intr(sc);
1680                 goto done;
1681         }
1682
1683         if (r & IWI_INTR_FW_INITED) {
1684                 if (!(r & (IWI_INTR_FATAL_ERROR | IWI_INTR_PARITY_ERROR)))
1685                         wakeup(sc);
1686         }
1687
1688         if (r & IWI_INTR_RADIO_OFF)
1689                 iwi_radio_off_intr(sc);
1690
1691         if (r & IWI_INTR_CMD_DONE) {
1692                 sc->flags &= ~IWI_FLAG_BUSY;
1693                 sc->sc_busy_timer = 0;
1694                 wakeup(sc);
1695         }
1696
1697         if (r & IWI_INTR_TX1_DONE)
1698                 iwi_tx_intr(sc, &sc->txq[0]);
1699
1700         if (r & IWI_INTR_TX2_DONE)
1701                 iwi_tx_intr(sc, &sc->txq[1]);
1702
1703         if (r & IWI_INTR_TX3_DONE)
1704                 iwi_tx_intr(sc, &sc->txq[2]);
1705
1706         if (r & IWI_INTR_TX4_DONE)
1707                 iwi_tx_intr(sc, &sc->txq[3]);
1708
1709         if (r & IWI_INTR_RX_DONE)
1710                 iwi_rx_intr(sc);
1711
1712         if (r & IWI_INTR_PARITY_ERROR) {
1713                 /* XXX rate-limit */
1714                 device_printf(sc->sc_dev, "parity error\n");
1715         }
1716 done:
1717         IWI_UNLOCK(sc);
1718 }
1719
1720 static int
1721 iwi_cmd(struct iwi_softc *sc, uint8_t type, void *data, uint8_t len)
1722 {
1723         struct iwi_cmd_desc *desc;
1724
1725         IWI_LOCK_ASSERT(sc);
1726
1727         if (sc->flags & IWI_FLAG_BUSY) {
1728                 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n",
1729                         __func__, type);
1730                 return EAGAIN;
1731         }
1732         sc->flags |= IWI_FLAG_BUSY;
1733         sc->sc_busy_timer = 2;
1734
1735         desc = &sc->cmdq.desc[sc->cmdq.cur];
1736
1737         desc->hdr.type = IWI_HDR_TYPE_COMMAND;
1738         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1739         desc->type = type;
1740         desc->len = len;
1741         memcpy(desc->data, data, len);
1742
1743         bus_dmamap_sync(sc->cmdq.desc_dmat, sc->cmdq.desc_map,
1744             BUS_DMASYNC_PREWRITE);
1745
1746         DPRINTFN(2, ("sending command idx=%u type=%u len=%u\n", sc->cmdq.cur,
1747             type, len));
1748
1749         sc->cmdq.cur = (sc->cmdq.cur + 1) % IWI_CMD_RING_COUNT;
1750         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
1751
1752         return msleep(sc, &sc->sc_mtx, 0, "iwicmd", hz);
1753 }
1754
1755 static void
1756 iwi_write_ibssnode(struct iwi_softc *sc,
1757         const u_int8_t addr[IEEE80211_ADDR_LEN], int entry)
1758 {
1759         struct iwi_ibssnode node;
1760
1761         /* write node information into NIC memory */
1762         memset(&node, 0, sizeof node);
1763         IEEE80211_ADDR_COPY(node.bssid, addr);
1764
1765         DPRINTF(("%s mac %6D station %u\n", __func__, node.bssid, ":", entry));
1766
1767         CSR_WRITE_REGION_1(sc,
1768             IWI_CSR_NODE_BASE + entry * sizeof node,
1769             (uint8_t *)&node, sizeof node);
1770 }
1771
1772 static int
1773 iwi_tx_start(struct iwi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni,
1774     int ac)
1775 {
1776         struct ieee80211vap *vap = ni->ni_vap;
1777         struct iwi_node *in = (struct iwi_node *)ni;
1778         const struct ieee80211_frame *wh;
1779         struct ieee80211_key *k;
1780         struct iwi_tx_ring *txq = &sc->txq[ac];
1781         struct iwi_tx_data *data;
1782         struct iwi_tx_desc *desc;
1783         struct mbuf *mnew;
1784         bus_dma_segment_t segs[IWI_MAX_NSEG];
1785         int error, nsegs, hdrlen, i;
1786         int ismcast, flags, xflags, staid;
1787
1788         IWI_LOCK_ASSERT(sc);
1789         wh = mtod(m0, const struct ieee80211_frame *);
1790         /* NB: only data frames use this path */
1791         hdrlen = ieee80211_hdrsize(wh);
1792         ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1793         flags = xflags = 0;
1794
1795         if (!ismcast)
1796                 flags |= IWI_DATA_FLAG_NEED_ACK;
1797         if (vap->iv_flags & IEEE80211_F_SHPREAMBLE)
1798                 flags |= IWI_DATA_FLAG_SHPREAMBLE;
1799         if (IEEE80211_QOS_HAS_SEQ(wh)) {
1800                 xflags |= IWI_DATA_XFLAG_QOS;
1801                 if (ieee80211_wme_vap_ac_is_noack(vap, ac))
1802                         flags &= ~IWI_DATA_FLAG_NEED_ACK;
1803         }
1804
1805         /*
1806          * This is only used in IBSS mode where the firmware expect an index
1807          * in a h/w table instead of a destination address.
1808          */
1809         if (vap->iv_opmode == IEEE80211_M_IBSS) {
1810                 if (!ismcast) {
1811                         if (in->in_station == -1) {
1812                                 in->in_station = alloc_unr(sc->sc_unr);
1813                                 if (in->in_station == -1) {
1814                                         /* h/w table is full */
1815                                         if_inc_counter(ni->ni_vap->iv_ifp,
1816                                             IFCOUNTER_OERRORS, 1);
1817                                         m_freem(m0);
1818                                         ieee80211_free_node(ni);
1819                                         return 0;
1820                                 }
1821                                 iwi_write_ibssnode(sc,
1822                                         ni->ni_macaddr, in->in_station);
1823                         }
1824                         staid = in->in_station;
1825                 } else {
1826                         /*
1827                          * Multicast addresses have no associated node
1828                          * so there will be no station entry.  We reserve
1829                          * entry 0 for one mcast address and use that.
1830                          * If there are many being used this will be
1831                          * expensive and we'll need to do a better job
1832                          * but for now this handles the broadcast case.
1833                          */
1834                         if (!IEEE80211_ADDR_EQ(wh->i_addr1, sc->sc_mcast)) {
1835                                 IEEE80211_ADDR_COPY(sc->sc_mcast, wh->i_addr1);
1836                                 iwi_write_ibssnode(sc, sc->sc_mcast, 0);
1837                         }
1838                         staid = 0;
1839                 }
1840         } else
1841                 staid = 0;
1842
1843         if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1844                 k = ieee80211_crypto_encap(ni, m0);
1845                 if (k == NULL) {
1846                         m_freem(m0);
1847                         return ENOBUFS;
1848                 }
1849
1850                 /* packet header may have moved, reset our local pointer */
1851                 wh = mtod(m0, struct ieee80211_frame *);
1852         }
1853
1854         if (ieee80211_radiotap_active_vap(vap)) {
1855                 struct iwi_tx_radiotap_header *tap = &sc->sc_txtap;
1856
1857                 tap->wt_flags = 0;
1858
1859                 ieee80211_radiotap_tx(vap, m0);
1860         }
1861
1862         data = &txq->data[txq->cur];
1863         desc = &txq->desc[txq->cur];
1864
1865         /* save and trim IEEE802.11 header */
1866         m_copydata(m0, 0, hdrlen, (caddr_t)&desc->wh);
1867         m_adj(m0, hdrlen);
1868
1869         error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, segs,
1870             &nsegs, 0);
1871         if (error != 0 && error != EFBIG) {
1872                 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1873                     error);
1874                 m_freem(m0);
1875                 return error;
1876         }
1877         if (error != 0) {
1878                 mnew = m_defrag(m0, M_NOWAIT);
1879                 if (mnew == NULL) {
1880                         device_printf(sc->sc_dev,
1881                             "could not defragment mbuf\n");
1882                         m_freem(m0);
1883                         return ENOBUFS;
1884                 }
1885                 m0 = mnew;
1886
1887                 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map,
1888                     m0, segs, &nsegs, 0);
1889                 if (error != 0) {
1890                         device_printf(sc->sc_dev,
1891                             "could not map mbuf (error %d)\n", error);
1892                         m_freem(m0);
1893                         return error;
1894                 }
1895         }
1896
1897         data->m = m0;
1898         data->ni = ni;
1899
1900         desc->hdr.type = IWI_HDR_TYPE_DATA;
1901         desc->hdr.flags = IWI_HDR_FLAG_IRQ;
1902         desc->station = staid;
1903         desc->cmd = IWI_DATA_CMD_TX;
1904         desc->len = htole16(m0->m_pkthdr.len);
1905         desc->flags = flags;
1906         desc->xflags = xflags;
1907
1908 #if 0
1909         if (vap->iv_flags & IEEE80211_F_PRIVACY)
1910                 desc->wep_txkey = vap->iv_def_txkey;
1911         else
1912 #endif
1913                 desc->flags |= IWI_DATA_FLAG_NO_WEP;
1914
1915         desc->nseg = htole32(nsegs);
1916         for (i = 0; i < nsegs; i++) {
1917                 desc->seg_addr[i] = htole32(segs[i].ds_addr);
1918                 desc->seg_len[i]  = htole16(segs[i].ds_len);
1919         }
1920
1921         bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1922         bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE);
1923
1924         DPRINTFN(5, ("sending data frame txq=%u idx=%u len=%u nseg=%u\n",
1925             ac, txq->cur, le16toh(desc->len), nsegs));
1926
1927         txq->queued++;
1928         txq->cur = (txq->cur + 1) % IWI_TX_RING_COUNT;
1929         CSR_WRITE_4(sc, txq->csr_widx, txq->cur);
1930
1931         return 0;
1932 }
1933
1934 static int
1935 iwi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
1936         const struct ieee80211_bpf_params *params)
1937 {
1938         /* no support; just discard */
1939         m_freem(m);
1940         ieee80211_free_node(ni);
1941         return 0;
1942 }
1943
1944 static int
1945 iwi_transmit(struct ieee80211com *ic, struct mbuf *m)
1946 {
1947         struct iwi_softc *sc = ic->ic_softc;
1948         int error;
1949         IWI_LOCK_DECL;
1950
1951         IWI_LOCK(sc);
1952         if (!sc->sc_running) {
1953                 IWI_UNLOCK(sc);
1954                 return (ENXIO);
1955         }
1956         error = mbufq_enqueue(&sc->sc_snd, m);
1957         if (error) {
1958                 IWI_UNLOCK(sc);
1959                 return (error);
1960         }
1961         iwi_start(sc);
1962         IWI_UNLOCK(sc);
1963         return (0);
1964 }
1965
1966 static void
1967 iwi_start(struct iwi_softc *sc)
1968 {
1969         struct mbuf *m;
1970         struct ieee80211_node *ni;
1971         int ac;
1972
1973         IWI_LOCK_ASSERT(sc);
1974
1975         while ((m =  mbufq_dequeue(&sc->sc_snd)) != NULL) {
1976                 ac = M_WME_GETAC(m);
1977                 if (sc->txq[ac].queued > IWI_TX_RING_COUNT - 8) {
1978                         /* there is no place left in this ring; tail drop */
1979                         /* XXX tail drop */
1980                         mbufq_prepend(&sc->sc_snd, m);
1981                         break;
1982                 }
1983                 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
1984                 if (iwi_tx_start(sc, m, ni, ac) != 0) {
1985                         if_inc_counter(ni->ni_vap->iv_ifp,
1986                             IFCOUNTER_OERRORS, 1);
1987                         ieee80211_free_node(ni);
1988                         break;
1989                 }
1990                 sc->sc_tx_timer = 5;
1991         }
1992 }
1993
1994 static void
1995 iwi_watchdog(void *arg)
1996 {
1997         struct iwi_softc *sc = arg;
1998         struct ieee80211com *ic = &sc->sc_ic;
1999
2000         IWI_LOCK_ASSERT(sc);
2001
2002         if (sc->sc_tx_timer > 0) {
2003                 if (--sc->sc_tx_timer == 0) {
2004                         device_printf(sc->sc_dev, "device timeout\n");
2005                         counter_u64_add(ic->ic_oerrors, 1);
2006                         ieee80211_runtask(ic, &sc->sc_restarttask);
2007                 }
2008         }
2009         if (sc->sc_state_timer > 0) {
2010                 if (--sc->sc_state_timer == 0) {
2011                         device_printf(sc->sc_dev,
2012                             "firmware stuck in state %d, resetting\n",
2013                             sc->fw_state);
2014                         if (sc->fw_state == IWI_FW_SCANNING)
2015                                 ieee80211_cancel_scan(TAILQ_FIRST(&ic->ic_vaps));
2016                         ieee80211_runtask(ic, &sc->sc_restarttask);
2017                         sc->sc_state_timer = 3;
2018                 }
2019         }
2020         if (sc->sc_busy_timer > 0) {
2021                 if (--sc->sc_busy_timer == 0) {
2022                         device_printf(sc->sc_dev,
2023                             "firmware command timeout, resetting\n");
2024                         ieee80211_runtask(ic, &sc->sc_restarttask);
2025                 }
2026         }
2027         callout_reset(&sc->sc_wdtimer, hz, iwi_watchdog, sc);
2028 }
2029
2030 static void
2031 iwi_parent(struct ieee80211com *ic)
2032 {
2033         struct iwi_softc *sc = ic->ic_softc;
2034         int startall = 0;
2035         IWI_LOCK_DECL;
2036
2037         IWI_LOCK(sc);
2038         if (ic->ic_nrunning > 0) {
2039                 if (!sc->sc_running) {
2040                         iwi_init_locked(sc);
2041                         startall = 1;
2042                 }
2043         } else if (sc->sc_running)
2044                 iwi_stop_locked(sc);
2045         IWI_UNLOCK(sc);
2046         if (startall)
2047                 ieee80211_start_all(ic);
2048 }
2049
2050 static int
2051 iwi_ioctl(struct ieee80211com *ic, u_long cmd, void *data)
2052 {
2053         struct ifreq *ifr = data;
2054         struct iwi_softc *sc = ic->ic_softc;
2055         int error;
2056         IWI_LOCK_DECL;
2057
2058         IWI_LOCK(sc);
2059         switch (cmd) {
2060         case SIOCGIWISTATS:
2061                 /* XXX validate permissions/memory/etc? */
2062                 error = copyout(&sc->sc_linkqual, ifr_data_get_ptr(ifr),
2063                     sizeof(struct iwi_notif_link_quality));
2064                 break;
2065         case SIOCZIWISTATS:
2066                 memset(&sc->sc_linkqual, 0,
2067                     sizeof(struct iwi_notif_link_quality));
2068                 error = 0;
2069                 break;
2070         default:
2071                 error = ENOTTY;
2072                 break;
2073         }
2074         IWI_UNLOCK(sc);
2075
2076         return (error);
2077 }
2078
2079 static void
2080 iwi_stop_master(struct iwi_softc *sc)
2081 {
2082         uint32_t tmp;
2083         int ntries;
2084
2085         /* disable interrupts */
2086         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, 0);
2087
2088         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_STOP_MASTER);
2089         for (ntries = 0; ntries < 5; ntries++) {
2090                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2091                         break;
2092                 DELAY(10);
2093         }
2094         if (ntries == 5)
2095                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2096
2097         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2098         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_PRINCETON_RESET);
2099
2100         sc->flags &= ~IWI_FLAG_FW_INITED;
2101 }
2102
2103 static int
2104 iwi_reset(struct iwi_softc *sc)
2105 {
2106         uint32_t tmp;
2107         int i, ntries;
2108
2109         iwi_stop_master(sc);
2110
2111         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2112         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2113
2114         CSR_WRITE_4(sc, IWI_CSR_READ_INT, IWI_READ_INT_INIT_HOST);
2115
2116         /* wait for clock stabilization */
2117         for (ntries = 0; ntries < 1000; ntries++) {
2118                 if (CSR_READ_4(sc, IWI_CSR_CTL) & IWI_CTL_CLOCK_READY)
2119                         break;
2120                 DELAY(200);
2121         }
2122         if (ntries == 1000) {
2123                 device_printf(sc->sc_dev,
2124                     "timeout waiting for clock stabilization\n");
2125                 return EIO;
2126         }
2127
2128         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2129         CSR_WRITE_4(sc, IWI_CSR_RST, tmp | IWI_RST_SOFT_RESET);
2130
2131         DELAY(10);
2132
2133         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2134         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_INIT);
2135
2136         /* clear NIC memory */
2137         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0);
2138         for (i = 0; i < 0xc000; i++)
2139                 CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2140
2141         return 0;
2142 }
2143
2144 static const struct iwi_firmware_ohdr *
2145 iwi_setup_ofw(struct iwi_softc *sc, struct iwi_fw *fw)
2146 {
2147         const struct firmware *fp = fw->fp;
2148         const struct iwi_firmware_ohdr *hdr;
2149
2150         if (fp->datasize < sizeof (struct iwi_firmware_ohdr)) {
2151                 device_printf(sc->sc_dev, "image '%s' too small\n", fp->name);
2152                 return NULL;
2153         }
2154         hdr = (const struct iwi_firmware_ohdr *)fp->data;
2155         if ((IWI_FW_GET_MAJOR(le32toh(hdr->version)) != IWI_FW_REQ_MAJOR) ||
2156             (IWI_FW_GET_MINOR(le32toh(hdr->version)) != IWI_FW_REQ_MINOR)) {
2157                 device_printf(sc->sc_dev, "version for '%s' %d.%d != %d.%d\n",
2158                     fp->name, IWI_FW_GET_MAJOR(le32toh(hdr->version)),
2159                     IWI_FW_GET_MINOR(le32toh(hdr->version)), IWI_FW_REQ_MAJOR,
2160                     IWI_FW_REQ_MINOR);
2161                 return NULL;
2162         }
2163         fw->data = ((const char *) fp->data) + sizeof(struct iwi_firmware_ohdr);
2164         fw->size = fp->datasize - sizeof(struct iwi_firmware_ohdr);
2165         fw->name = fp->name;
2166         return hdr;
2167 }
2168
2169 static const struct iwi_firmware_ohdr *
2170 iwi_setup_oucode(struct iwi_softc *sc, struct iwi_fw *fw)
2171 {
2172         const struct iwi_firmware_ohdr *hdr;
2173
2174         hdr = iwi_setup_ofw(sc, fw);
2175         if (hdr != NULL && le32toh(hdr->mode) != IWI_FW_MODE_UCODE) {
2176                 device_printf(sc->sc_dev, "%s is not a ucode image\n",
2177                     fw->name);
2178                 hdr = NULL;
2179         }
2180         return hdr;
2181 }
2182
2183 static void
2184 iwi_getfw(struct iwi_fw *fw, const char *fwname,
2185           struct iwi_fw *uc, const char *ucname)
2186 {
2187         if (fw->fp == NULL)
2188                 fw->fp = firmware_get(fwname);
2189         /* NB: pre-3.0 ucode is packaged separately */
2190         if (uc->fp == NULL && fw->fp != NULL && fw->fp->version < 300)
2191                 uc->fp = firmware_get(ucname);
2192 }
2193
2194 /*
2195  * Get the required firmware images if not already loaded.
2196  * Note that we hold firmware images so long as the device
2197  * is marked up in case we need to reload them on device init.
2198  * This is necessary because we re-init the device sometimes
2199  * from a context where we cannot read from the filesystem
2200  * (e.g. from the taskqueue thread when rfkill is re-enabled).
2201  * XXX return 0 on success, 1 on error.
2202  *
2203  * NB: the order of get'ing and put'ing images here is
2204  * intentional to support handling firmware images bundled
2205  * by operating mode and/or all together in one file with
2206  * the boot firmware as "master".
2207  */
2208 static int
2209 iwi_get_firmware(struct iwi_softc *sc, enum ieee80211_opmode opmode)
2210 {
2211         const struct iwi_firmware_hdr *hdr;
2212         const struct firmware *fp;
2213
2214         /* invalidate cached firmware on mode change */
2215         if (sc->fw_mode != opmode)
2216                 iwi_put_firmware(sc);
2217
2218         switch (opmode) {
2219         case IEEE80211_M_STA:
2220                 iwi_getfw(&sc->fw_fw, "iwi_bss", &sc->fw_uc, "iwi_ucode_bss");
2221                 break;
2222         case IEEE80211_M_IBSS:
2223                 iwi_getfw(&sc->fw_fw, "iwi_ibss", &sc->fw_uc, "iwi_ucode_ibss");
2224                 break;
2225         case IEEE80211_M_MONITOR:
2226                 iwi_getfw(&sc->fw_fw, "iwi_monitor",
2227                           &sc->fw_uc, "iwi_ucode_monitor");
2228                 break;
2229         default:
2230                 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode);
2231                 return EINVAL;
2232         }
2233         fp = sc->fw_fw.fp;
2234         if (fp == NULL) {
2235                 device_printf(sc->sc_dev, "could not load firmware\n");
2236                 goto bad;
2237         }
2238         if (fp->version < 300) {
2239                 /*
2240                  * Firmware prior to 3.0 was packaged as separate
2241                  * boot, firmware, and ucode images.  Verify the
2242                  * ucode image was read in, retrieve the boot image
2243                  * if needed, and check version stamps for consistency.
2244                  * The version stamps in the data are also checked
2245                  * above; this is a bit paranoid but is a cheap
2246                  * safeguard against mis-packaging.
2247                  */
2248                 if (sc->fw_uc.fp == NULL) {
2249                         device_printf(sc->sc_dev, "could not load ucode\n");
2250                         goto bad;
2251                 }
2252                 if (sc->fw_boot.fp == NULL) {
2253                         sc->fw_boot.fp = firmware_get("iwi_boot");
2254                         if (sc->fw_boot.fp == NULL) {
2255                                 device_printf(sc->sc_dev,
2256                                         "could not load boot firmware\n");
2257                                 goto bad;
2258                         }
2259                 }
2260                 if (sc->fw_boot.fp->version != sc->fw_fw.fp->version ||
2261                     sc->fw_boot.fp->version != sc->fw_uc.fp->version) {
2262                         device_printf(sc->sc_dev,
2263                             "firmware version mismatch: "
2264                             "'%s' is %d, '%s' is %d, '%s' is %d\n",
2265                             sc->fw_boot.fp->name, sc->fw_boot.fp->version,
2266                             sc->fw_uc.fp->name, sc->fw_uc.fp->version,
2267                             sc->fw_fw.fp->name, sc->fw_fw.fp->version
2268                         );
2269                         goto bad;
2270                 }
2271                 /*
2272                  * Check and setup each image.
2273                  */
2274                 if (iwi_setup_oucode(sc, &sc->fw_uc) == NULL ||
2275                     iwi_setup_ofw(sc, &sc->fw_boot) == NULL ||
2276                     iwi_setup_ofw(sc, &sc->fw_fw) == NULL)
2277                         goto bad;
2278         } else {
2279                 /*
2280                  * Check and setup combined image.
2281                  */
2282                 if (fp->datasize < sizeof(struct iwi_firmware_hdr)) {
2283                         device_printf(sc->sc_dev, "image '%s' too small\n",
2284                             fp->name);
2285                         goto bad;
2286                 }
2287                 hdr = (const struct iwi_firmware_hdr *)fp->data;
2288                 if (fp->datasize < sizeof(*hdr) + le32toh(hdr->bsize) + le32toh(hdr->usize)
2289                                 + le32toh(hdr->fsize)) {
2290                         device_printf(sc->sc_dev, "image '%s' too small (2)\n",
2291                             fp->name);
2292                         goto bad;
2293                 }
2294                 sc->fw_boot.data = ((const char *) fp->data) + sizeof(*hdr);
2295                 sc->fw_boot.size = le32toh(hdr->bsize);
2296                 sc->fw_boot.name = fp->name;
2297                 sc->fw_uc.data = sc->fw_boot.data + sc->fw_boot.size;
2298                 sc->fw_uc.size = le32toh(hdr->usize);
2299                 sc->fw_uc.name = fp->name;
2300                 sc->fw_fw.data = sc->fw_uc.data + sc->fw_uc.size;
2301                 sc->fw_fw.size = le32toh(hdr->fsize);
2302                 sc->fw_fw.name = fp->name;
2303         }
2304 #if 0
2305         device_printf(sc->sc_dev, "boot %d ucode %d fw %d bytes\n",
2306                 sc->fw_boot.size, sc->fw_uc.size, sc->fw_fw.size);
2307 #endif
2308
2309         sc->fw_mode = opmode;
2310         return 0;
2311 bad:
2312         iwi_put_firmware(sc);
2313         return 1;
2314 }
2315
2316 static void
2317 iwi_put_fw(struct iwi_fw *fw)
2318 {
2319         if (fw->fp != NULL) {
2320                 firmware_put(fw->fp, FIRMWARE_UNLOAD);
2321                 fw->fp = NULL;
2322         }
2323         fw->data = NULL;
2324         fw->size = 0;
2325         fw->name = NULL;
2326 }
2327
2328 /*
2329  * Release any cached firmware images.
2330  */
2331 static void
2332 iwi_put_firmware(struct iwi_softc *sc)
2333 {
2334         iwi_put_fw(&sc->fw_uc);
2335         iwi_put_fw(&sc->fw_fw);
2336         iwi_put_fw(&sc->fw_boot);
2337 }
2338
2339 static int
2340 iwi_load_ucode(struct iwi_softc *sc, const struct iwi_fw *fw)
2341 {
2342         uint32_t tmp;
2343         const uint16_t *w;
2344         const char *uc = fw->data;
2345         size_t size = fw->size;
2346         int i, ntries, error;
2347
2348         IWI_LOCK_ASSERT(sc);
2349         error = 0;
2350         CSR_WRITE_4(sc, IWI_CSR_RST, CSR_READ_4(sc, IWI_CSR_RST) |
2351             IWI_RST_STOP_MASTER);
2352         for (ntries = 0; ntries < 5; ntries++) {
2353                 if (CSR_READ_4(sc, IWI_CSR_RST) & IWI_RST_MASTER_DISABLED)
2354                         break;
2355                 DELAY(10);
2356         }
2357         if (ntries == 5) {
2358                 device_printf(sc->sc_dev, "timeout waiting for master\n");
2359                 error = EIO;
2360                 goto fail;
2361         }
2362
2363         MEM_WRITE_4(sc, 0x3000e0, 0x80000000);
2364         DELAY(5000);
2365
2366         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2367         tmp &= ~IWI_RST_PRINCETON_RESET;
2368         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2369
2370         DELAY(5000);
2371         MEM_WRITE_4(sc, 0x3000e0, 0);
2372         DELAY(1000);
2373         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 1);
2374         DELAY(1000);
2375         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, 0);
2376         DELAY(1000);
2377         MEM_WRITE_1(sc, 0x200000, 0x00);
2378         MEM_WRITE_1(sc, 0x200000, 0x40);
2379         DELAY(1000);
2380
2381         /* write microcode into adapter memory */
2382         for (w = (const uint16_t *)uc; size > 0; w++, size -= 2)
2383                 MEM_WRITE_2(sc, 0x200010, htole16(*w));
2384
2385         MEM_WRITE_1(sc, 0x200000, 0x00);
2386         MEM_WRITE_1(sc, 0x200000, 0x80);
2387
2388         /* wait until we get an answer */
2389         for (ntries = 0; ntries < 100; ntries++) {
2390                 if (MEM_READ_1(sc, 0x200000) & 1)
2391                         break;
2392                 DELAY(100);
2393         }
2394         if (ntries == 100) {
2395                 device_printf(sc->sc_dev,
2396                     "timeout waiting for ucode to initialize\n");
2397                 error = EIO;
2398                 goto fail;
2399         }
2400
2401         /* read the answer or the firmware will not initialize properly */
2402         for (i = 0; i < 7; i++)
2403                 MEM_READ_4(sc, 0x200004);
2404
2405         MEM_WRITE_1(sc, 0x200000, 0x00);
2406
2407 fail:
2408         return error;
2409 }
2410
2411 /* macro to handle unaligned little endian data in firmware image */
2412 #define GETLE32(p) ((p)[0] | (p)[1] << 8 | (p)[2] << 16 | (p)[3] << 24)
2413
2414 static int
2415 iwi_load_firmware(struct iwi_softc *sc, const struct iwi_fw *fw)
2416 {
2417         u_char *p, *end;
2418         uint32_t sentinel, ctl, src, dst, sum, len, mlen, tmp;
2419         int ntries, error;
2420
2421         IWI_LOCK_ASSERT(sc);
2422
2423         /* copy firmware image to DMA memory */
2424         memcpy(sc->fw_virtaddr, fw->data, fw->size);
2425
2426         /* make sure the adapter will get up-to-date values */
2427         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_PREWRITE);
2428
2429         /* tell the adapter where the command blocks are stored */
2430         MEM_WRITE_4(sc, 0x3000a0, 0x27000);
2431
2432         /*
2433          * Store command blocks into adapter's internal memory using register
2434          * indirections. The adapter will read the firmware image through DMA
2435          * using information stored in command blocks.
2436          */
2437         src = sc->fw_physaddr;
2438         p = sc->fw_virtaddr;
2439         end = p + fw->size;
2440         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_ADDR, 0x27000);
2441
2442         while (p < end) {
2443                 dst = GETLE32(p); p += 4; src += 4;
2444                 len = GETLE32(p); p += 4; src += 4;
2445                 p += len;
2446
2447                 while (len > 0) {
2448                         mlen = min(len, IWI_CB_MAXDATALEN);
2449
2450                         ctl = IWI_CB_DEFAULT_CTL | mlen;
2451                         sum = ctl ^ src ^ dst;
2452
2453                         /* write a command block */
2454                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, ctl);
2455                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, src);
2456                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, dst);
2457                         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, sum);
2458
2459                         src += mlen;
2460                         dst += mlen;
2461                         len -= mlen;
2462                 }
2463         }
2464
2465         /* write a fictive final command block (sentinel) */
2466         sentinel = CSR_READ_4(sc, IWI_CSR_AUTOINC_ADDR);
2467         CSR_WRITE_4(sc, IWI_CSR_AUTOINC_DATA, 0);
2468
2469         tmp = CSR_READ_4(sc, IWI_CSR_RST);
2470         tmp &= ~(IWI_RST_MASTER_DISABLED | IWI_RST_STOP_MASTER);
2471         CSR_WRITE_4(sc, IWI_CSR_RST, tmp);
2472
2473         /* tell the adapter to start processing command blocks */
2474         MEM_WRITE_4(sc, 0x3000a4, 0x540100);
2475
2476         /* wait until the adapter reaches the sentinel */
2477         for (ntries = 0; ntries < 400; ntries++) {
2478                 if (MEM_READ_4(sc, 0x3000d0) >= sentinel)
2479                         break;
2480                 DELAY(100);
2481         }
2482         /* sync dma, just in case */
2483         bus_dmamap_sync(sc->fw_dmat, sc->fw_map, BUS_DMASYNC_POSTWRITE);
2484         if (ntries == 400) {
2485                 device_printf(sc->sc_dev,
2486                     "timeout processing command blocks for %s firmware\n",
2487                     fw->name);
2488                 return EIO;
2489         }
2490
2491         /* we're done with command blocks processing */
2492         MEM_WRITE_4(sc, 0x3000a4, 0x540c00);
2493
2494         /* allow interrupts so we know when the firmware is ready */
2495         CSR_WRITE_4(sc, IWI_CSR_INTR_MASK, IWI_INTR_MASK);
2496
2497         /* tell the adapter to initialize the firmware */
2498         CSR_WRITE_4(sc, IWI_CSR_RST, 0);
2499
2500         tmp = CSR_READ_4(sc, IWI_CSR_CTL);
2501         CSR_WRITE_4(sc, IWI_CSR_CTL, tmp | IWI_CTL_ALLOW_STANDBY);
2502
2503         /* wait at most one second for firmware initialization to complete */
2504         if ((error = msleep(sc, &sc->sc_mtx, 0, "iwiinit", hz)) != 0) {
2505                 device_printf(sc->sc_dev, "timeout waiting for %s firmware "
2506                     "initialization to complete\n", fw->name);
2507         }
2508
2509         return error;
2510 }
2511
2512 static int
2513 iwi_setpowermode(struct iwi_softc *sc, struct ieee80211vap *vap)
2514 {
2515         uint32_t data;
2516
2517         if (vap->iv_flags & IEEE80211_F_PMGTON) {
2518                 /* XXX set more fine-grained operation */
2519                 data = htole32(IWI_POWER_MODE_MAX);
2520         } else
2521                 data = htole32(IWI_POWER_MODE_CAM);
2522
2523         DPRINTF(("Setting power mode to %u\n", le32toh(data)));
2524         return iwi_cmd(sc, IWI_CMD_SET_POWER_MODE, &data, sizeof data);
2525 }
2526
2527 static int
2528 iwi_setwepkeys(struct iwi_softc *sc, struct ieee80211vap *vap)
2529 {
2530         struct iwi_wep_key wepkey;
2531         struct ieee80211_key *wk;
2532         int error, i;
2533
2534         for (i = 0; i < IEEE80211_WEP_NKID; i++) {
2535                 wk = &vap->iv_nw_keys[i];
2536
2537                 wepkey.cmd = IWI_WEP_KEY_CMD_SETKEY;
2538                 wepkey.idx = i;
2539                 wepkey.len = wk->wk_keylen;
2540                 memset(wepkey.key, 0, sizeof wepkey.key);
2541                 memcpy(wepkey.key, wk->wk_key, wk->wk_keylen);
2542                 DPRINTF(("Setting wep key index %u len %u\n", wepkey.idx,
2543                     wepkey.len));
2544                 error = iwi_cmd(sc, IWI_CMD_SET_WEP_KEY, &wepkey,
2545                     sizeof wepkey);
2546                 if (error != 0)
2547                         return error;
2548         }
2549         return 0;
2550 }
2551
2552 static int
2553 iwi_set_rateset(struct iwi_softc *sc, const struct ieee80211_rateset *net_rs,
2554     int mode, int type)
2555 {
2556         struct iwi_rateset rs;
2557
2558         memset(&rs, 0, sizeof(rs));
2559         rs.mode = mode;
2560         rs.type = type;
2561         rs.nrates = net_rs->rs_nrates;
2562         if (rs.nrates > nitems(rs.rates)) {
2563                 DPRINTF(("Truncating negotiated rate set from %u\n",
2564                     rs.nrates));
2565                 rs.nrates = nitems(rs.rates);
2566         }
2567         memcpy(rs.rates, net_rs->rs_rates, rs.nrates);
2568         DPRINTF(("Setting .11%c%s %s rates (%u)\n",
2569             mode == IWI_MODE_11A ? 'a' : 'b',
2570             mode == IWI_MODE_11G ? "g" : "",
2571             type == IWI_RATESET_TYPE_SUPPORTED ? "supported" : "negotiated",
2572             rs.nrates));
2573
2574         return (iwi_cmd(sc, IWI_CMD_SET_RATES, &rs, sizeof(rs)));
2575 }
2576
2577 static int
2578 iwi_config(struct iwi_softc *sc)
2579 {
2580         struct ieee80211com *ic = &sc->sc_ic;
2581         struct iwi_configuration config;
2582         struct iwi_txpower power;
2583         uint32_t data;
2584         int error, i;
2585
2586         IWI_LOCK_ASSERT(sc);
2587
2588         DPRINTF(("Setting MAC address to %6D\n", ic->ic_macaddr, ":"));
2589         error = iwi_cmd(sc, IWI_CMD_SET_MAC_ADDRESS, ic->ic_macaddr,
2590             IEEE80211_ADDR_LEN);
2591         if (error != 0)
2592                 return error;
2593
2594         memset(&config, 0, sizeof config);
2595         config.bluetooth_coexistence = sc->bluetooth;
2596         config.silence_threshold = 0x1e;
2597         config.antenna = sc->antenna;
2598         config.multicast_enabled = 1;
2599         config.answer_pbreq = (ic->ic_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2600         config.disable_unicast_decryption = 1;
2601         config.disable_multicast_decryption = 1;
2602         if (ic->ic_opmode == IEEE80211_M_MONITOR) {
2603                 config.allow_invalid_frames = 1;
2604                 config.allow_beacon_and_probe_resp = 1;
2605                 config.allow_mgt = 1;
2606         }
2607         DPRINTF(("Configuring adapter\n"));
2608         error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2609         if (error != 0)
2610                 return error;
2611         if (ic->ic_opmode == IEEE80211_M_IBSS) {
2612                 power.mode = IWI_MODE_11B;
2613                 power.nchan = 11;
2614                 for (i = 0; i < 11; i++) {
2615                         power.chan[i].chan = i + 1;
2616                         power.chan[i].power = IWI_TXPOWER_MAX;
2617                 }
2618                 DPRINTF(("Setting .11b channels tx power\n"));
2619                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2620                 if (error != 0)
2621                         return error;
2622
2623                 power.mode = IWI_MODE_11G;
2624                 DPRINTF(("Setting .11g channels tx power\n"));
2625                 error = iwi_cmd(sc, IWI_CMD_SET_TX_POWER, &power, sizeof power);
2626                 if (error != 0)
2627                         return error;
2628         }
2629
2630         error = iwi_set_rateset(sc, &ic->ic_sup_rates[IEEE80211_MODE_11G],
2631             IWI_MODE_11G, IWI_RATESET_TYPE_SUPPORTED);
2632         if (error != 0)
2633                 return error;
2634
2635         error = iwi_set_rateset(sc, &ic->ic_sup_rates[IEEE80211_MODE_11A],
2636             IWI_MODE_11A, IWI_RATESET_TYPE_SUPPORTED);
2637         if (error != 0)
2638                 return error;
2639
2640         data = htole32(arc4random());
2641         DPRINTF(("Setting initialization vector to %u\n", le32toh(data)));
2642         error = iwi_cmd(sc, IWI_CMD_SET_IV, &data, sizeof data);
2643         if (error != 0)
2644                 return error;
2645
2646         /* enable adapter */
2647         DPRINTF(("Enabling adapter\n"));
2648         return iwi_cmd(sc, IWI_CMD_ENABLE, NULL, 0);
2649 }
2650
2651 static __inline void
2652 set_scan_type(struct iwi_scan_ext *scan, int ix, int scan_type)
2653 {
2654         uint8_t *st = &scan->scan_type[ix / 2];
2655         if (ix % 2)
2656                 *st = (*st & 0xf0) | ((scan_type & 0xf) << 0);
2657         else
2658                 *st = (*st & 0x0f) | ((scan_type & 0xf) << 4);
2659 }
2660
2661 static int
2662 scan_type(const struct ieee80211_scan_state *ss,
2663         const struct ieee80211_channel *chan)
2664 {
2665         /* We can only set one essid for a directed scan */
2666         if (ss->ss_nssid != 0)
2667                 return IWI_SCAN_TYPE_BDIRECTED;
2668         if ((ss->ss_flags & IEEE80211_SCAN_ACTIVE) &&
2669             (chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0)
2670                 return IWI_SCAN_TYPE_BROADCAST;
2671         return IWI_SCAN_TYPE_PASSIVE;
2672 }
2673
2674 static __inline int
2675 scan_band(const struct ieee80211_channel *c)
2676 {
2677         return IEEE80211_IS_CHAN_5GHZ(c) ?  IWI_CHAN_5GHZ : IWI_CHAN_2GHZ;
2678 }
2679
2680 static void
2681 iwi_monitor_scan(void *arg, int npending)
2682 {
2683         struct iwi_softc *sc = arg;
2684         IWI_LOCK_DECL;
2685
2686         IWI_LOCK(sc);
2687         (void) iwi_scanchan(sc, 2000, 0);
2688         IWI_UNLOCK(sc);
2689 }
2690
2691 /*
2692  * Start a scan on the current channel or all channels.
2693  */
2694 static int
2695 iwi_scanchan(struct iwi_softc *sc, unsigned long maxdwell, int allchan)
2696 {
2697         struct ieee80211com *ic = &sc->sc_ic;
2698         struct ieee80211_channel *chan;
2699         struct ieee80211_scan_state *ss;
2700         struct iwi_scan_ext scan;
2701         int error = 0;
2702
2703         IWI_LOCK_ASSERT(sc);
2704         if (sc->fw_state == IWI_FW_SCANNING) {
2705                 /*
2706                  * This should not happen as we only trigger scan_next after
2707                  * completion
2708                  */
2709                 DPRINTF(("%s: called too early - still scanning\n", __func__));
2710                 return (EBUSY);
2711         }
2712         IWI_STATE_BEGIN(sc, IWI_FW_SCANNING);
2713
2714         ss = ic->ic_scan;
2715
2716         memset(&scan, 0, sizeof scan);
2717         scan.full_scan_index = htole32(++sc->sc_scangen);
2718         scan.dwell_time[IWI_SCAN_TYPE_PASSIVE] = htole16(maxdwell);
2719         if (ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) {
2720                 /*
2721                  * Use very short dwell times for when we send probe request
2722                  * frames.  Without this bg scans hang.  Ideally this should
2723                  * be handled with early-termination as done by net80211 but
2724                  * that's not feasible (aborting a scan is problematic).
2725                  */
2726                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(30);
2727                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(30);
2728         } else {
2729                 scan.dwell_time[IWI_SCAN_TYPE_BROADCAST] = htole16(maxdwell);
2730                 scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED] = htole16(maxdwell);
2731         }
2732
2733         /* We can only set one essid for a directed scan */
2734         if (ss->ss_nssid != 0) {
2735                 error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ss->ss_ssid[0].ssid,
2736                     ss->ss_ssid[0].len);
2737                 if (error)
2738                         return (error);
2739         }
2740
2741         if (allchan) {
2742                 int i, next, band, b, bstart;
2743                 /*
2744                  * Convert scan list to run-length encoded channel list
2745                  * the firmware requires (preserving the order setup by
2746                  * net80211).  The first entry in each run specifies the
2747                  * band and the count of items in the run.
2748                  */
2749                 next = 0;               /* next open slot */
2750                 bstart = 0;             /* NB: not needed, silence compiler */
2751                 band = -1;              /* NB: impossible value */
2752                 KASSERT(ss->ss_last > 0, ("no channels"));
2753                 for (i = 0; i < ss->ss_last; i++) {
2754                         chan = ss->ss_chans[i];
2755                         b = scan_band(chan);
2756                         if (b != band) {
2757                                 if (band != -1)
2758                                         scan.channels[bstart] =
2759                                             (next - bstart) | band;
2760                                 /* NB: this allocates a slot for the run-len */
2761                                 band = b, bstart = next++;
2762                         }
2763                         if (next >= IWI_SCAN_CHANNELS) {
2764                                 DPRINTF(("truncating scan list\n"));
2765                                 break;
2766                         }
2767                         scan.channels[next] = ieee80211_chan2ieee(ic, chan);
2768                         set_scan_type(&scan, next, scan_type(ss, chan));
2769                         next++;
2770                 }
2771                 scan.channels[bstart] = (next - bstart) | band;
2772         } else {
2773                 /* Scan the current channel only */
2774                 chan = ic->ic_curchan;
2775                 scan.channels[0] = 1 | scan_band(chan);
2776                 scan.channels[1] = ieee80211_chan2ieee(ic, chan);
2777                 set_scan_type(&scan, 1, scan_type(ss, chan));
2778         }
2779 #ifdef IWI_DEBUG
2780         if (iwi_debug > 0) {
2781                 static const char *scantype[8] =
2782                    { "PSTOP", "PASV", "DIR", "BCAST", "BDIR", "5", "6", "7" };
2783                 int i;
2784                 printf("Scan request: index %u dwell %d/%d/%d\n"
2785                     , le32toh(scan.full_scan_index)
2786                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_PASSIVE])
2787                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BROADCAST])
2788                     , le16toh(scan.dwell_time[IWI_SCAN_TYPE_BDIRECTED])
2789                 );
2790                 i = 0;
2791                 do {
2792                         int run = scan.channels[i];
2793                         if (run == 0)
2794                                 break;
2795                         printf("Scan %d %s channels:", run & 0x3f,
2796                             run & IWI_CHAN_2GHZ ? "2.4GHz" : "5GHz");
2797                         for (run &= 0x3f, i++; run > 0; run--, i++) {
2798                                 uint8_t type = scan.scan_type[i/2];
2799                                 printf(" %u/%s", scan.channels[i],
2800                                     scantype[(i & 1 ? type : type>>4) & 7]);
2801                         }
2802                         printf("\n");
2803                 } while (i < IWI_SCAN_CHANNELS);
2804         }
2805 #endif
2806
2807         return (iwi_cmd(sc, IWI_CMD_SCAN_EXT, &scan, sizeof scan));
2808 }
2809
2810 static int
2811 iwi_set_sensitivity(struct iwi_softc *sc, int8_t rssi_dbm)
2812 {
2813         struct iwi_sensitivity sens;
2814
2815         DPRINTF(("Setting sensitivity to %d\n", rssi_dbm));
2816
2817         memset(&sens, 0, sizeof sens);
2818         sens.rssi = htole16(rssi_dbm);
2819         return iwi_cmd(sc, IWI_CMD_SET_SENSITIVITY, &sens, sizeof sens);
2820 }
2821
2822 static int
2823 iwi_auth_and_assoc(struct iwi_softc *sc, struct ieee80211vap *vap)
2824 {
2825         struct ieee80211com *ic = vap->iv_ic;
2826         struct ifnet *ifp = vap->iv_ifp;
2827         struct ieee80211_node *ni;
2828         struct iwi_configuration config;
2829         struct iwi_associate *assoc = &sc->assoc;
2830         uint16_t capinfo;
2831         uint32_t data;
2832         int error, mode;
2833
2834         IWI_LOCK_ASSERT(sc);
2835
2836         ni = ieee80211_ref_node(vap->iv_bss);
2837
2838         if (sc->flags & IWI_FLAG_ASSOCIATED) {
2839                 DPRINTF(("Already associated\n"));
2840                 return (-1);
2841         }
2842
2843         IWI_STATE_BEGIN(sc, IWI_FW_ASSOCIATING);
2844         error = 0;
2845         mode = 0;
2846
2847         if (IEEE80211_IS_CHAN_A(ic->ic_curchan))
2848                 mode = IWI_MODE_11A;
2849         else if (IEEE80211_IS_CHAN_G(ic->ic_curchan))
2850                 mode = IWI_MODE_11G;
2851         if (IEEE80211_IS_CHAN_B(ic->ic_curchan))
2852                 mode = IWI_MODE_11B;
2853
2854         if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) {
2855                 memset(&config, 0, sizeof config);
2856                 config.bluetooth_coexistence = sc->bluetooth;
2857                 config.antenna = sc->antenna;
2858                 config.multicast_enabled = 1;
2859                 if (mode == IWI_MODE_11G)
2860                         config.use_protection = 1;
2861                 config.answer_pbreq =
2862                     (vap->iv_opmode == IEEE80211_M_IBSS) ? 1 : 0;
2863                 config.disable_unicast_decryption = 1;
2864                 config.disable_multicast_decryption = 1;
2865                 DPRINTF(("Configuring adapter\n"));
2866                 error = iwi_cmd(sc, IWI_CMD_SET_CONFIG, &config, sizeof config);
2867                 if (error != 0)
2868                         goto done;
2869         }
2870
2871 #ifdef IWI_DEBUG
2872         if (iwi_debug > 0) {
2873                 printf("Setting ESSID to ");
2874                 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
2875                 printf("\n");
2876         }
2877 #endif
2878         error = iwi_cmd(sc, IWI_CMD_SET_ESSID, ni->ni_essid, ni->ni_esslen);
2879         if (error != 0)
2880                 goto done;
2881
2882         error = iwi_setpowermode(sc, vap);
2883         if (error != 0)
2884                 goto done;
2885
2886         data = htole32(vap->iv_rtsthreshold);
2887         DPRINTF(("Setting RTS threshold to %u\n", le32toh(data)));
2888         error = iwi_cmd(sc, IWI_CMD_SET_RTS_THRESHOLD, &data, sizeof data);
2889         if (error != 0)
2890                 goto done;
2891
2892         data = htole32(vap->iv_fragthreshold);
2893         DPRINTF(("Setting fragmentation threshold to %u\n", le32toh(data)));
2894         error = iwi_cmd(sc, IWI_CMD_SET_FRAG_THRESHOLD, &data, sizeof data);
2895         if (error != 0)
2896                 goto done;
2897
2898         /* the rate set has already been "negotiated" */
2899         error = iwi_set_rateset(sc, &ni->ni_rates, mode,
2900             IWI_RATESET_TYPE_NEGOTIATED);
2901         if (error != 0)
2902                 goto done;
2903
2904         memset(assoc, 0, sizeof *assoc);
2905
2906         if ((vap->iv_flags & IEEE80211_F_WME) && ni->ni_ies.wme_ie != NULL) {
2907                 /* NB: don't treat WME setup as failure */
2908                 if (iwi_wme_setparams(sc) == 0 && iwi_wme_setie(sc) == 0)
2909                         assoc->policy |= htole16(IWI_POLICY_WME);
2910                 /* XXX complain on failure? */
2911         }
2912
2913         if (vap->iv_appie_wpa != NULL) {
2914                 struct ieee80211_appie *ie = vap->iv_appie_wpa;
2915
2916                 DPRINTF(("Setting optional IE (len=%u)\n", ie->ie_len));
2917                 error = iwi_cmd(sc, IWI_CMD_SET_OPTIE, ie->ie_data, ie->ie_len);
2918                 if (error != 0)
2919                         goto done;
2920         }
2921
2922         error = iwi_set_sensitivity(sc, ic->ic_node_getrssi(ni));
2923         if (error != 0)
2924                 goto done;
2925
2926         assoc->mode = mode;
2927         assoc->chan = ic->ic_curchan->ic_ieee;
2928         /*
2929          * NB: do not arrange for shared key auth w/o privacy
2930          *     (i.e. a wep key); it causes a firmware error.
2931          */
2932         if ((vap->iv_flags & IEEE80211_F_PRIVACY) &&
2933             ni->ni_authmode == IEEE80211_AUTH_SHARED) {
2934                 assoc->auth = IWI_AUTH_SHARED;
2935                 /*
2936                  * It's possible to have privacy marked but no default
2937                  * key setup.  This typically is due to a user app bug
2938                  * but if we blindly grab the key the firmware will
2939                  * barf so avoid it for now.
2940                  */
2941                 if (vap->iv_def_txkey != IEEE80211_KEYIX_NONE)
2942                         assoc->auth |= vap->iv_def_txkey << 4;
2943
2944                 error = iwi_setwepkeys(sc, vap);
2945                 if (error != 0)
2946                         goto done;
2947         }
2948         if (vap->iv_flags & IEEE80211_F_WPA)
2949                 assoc->policy |= htole16(IWI_POLICY_WPA);
2950         if (vap->iv_opmode == IEEE80211_M_IBSS && ni->ni_tstamp.tsf == 0)
2951                 assoc->type = IWI_HC_IBSS_START;
2952         else
2953                 assoc->type = IWI_HC_ASSOC;
2954         memcpy(assoc->tstamp, ni->ni_tstamp.data, 8);
2955
2956         if (vap->iv_opmode == IEEE80211_M_IBSS)
2957                 capinfo = IEEE80211_CAPINFO_IBSS;
2958         else
2959                 capinfo = IEEE80211_CAPINFO_ESS;
2960         if (vap->iv_flags & IEEE80211_F_PRIVACY)
2961                 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2962         if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2963             IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
2964                 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2965         if (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)
2966                 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2967         assoc->capinfo = htole16(capinfo);
2968
2969         assoc->lintval = htole16(ic->ic_lintval);
2970         assoc->intval = htole16(ni->ni_intval);
2971         IEEE80211_ADDR_COPY(assoc->bssid, ni->ni_bssid);
2972         if (vap->iv_opmode == IEEE80211_M_IBSS)
2973                 IEEE80211_ADDR_COPY(assoc->dst, ifp->if_broadcastaddr);
2974         else
2975                 IEEE80211_ADDR_COPY(assoc->dst, ni->ni_bssid);
2976
2977         DPRINTF(("%s bssid %6D dst %6D channel %u policy 0x%x "
2978             "auth %u capinfo 0x%x lintval %u bintval %u\n",
2979             assoc->type == IWI_HC_IBSS_START ? "Start" : "Join",
2980             assoc->bssid, ":", assoc->dst, ":",
2981             assoc->chan, le16toh(assoc->policy), assoc->auth,
2982             le16toh(assoc->capinfo), le16toh(assoc->lintval),
2983             le16toh(assoc->intval)));
2984         error = iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
2985 done:
2986         ieee80211_free_node(ni);
2987         if (error)
2988                 IWI_STATE_END(sc, IWI_FW_ASSOCIATING);
2989
2990         return (error);
2991 }
2992
2993 static void
2994 iwi_disassoc(void *arg, int pending)
2995 {
2996         struct iwi_softc *sc = arg;
2997         IWI_LOCK_DECL;
2998
2999         IWI_LOCK(sc);
3000         iwi_disassociate(sc, 0);
3001         IWI_UNLOCK(sc);
3002 }
3003
3004 static int
3005 iwi_disassociate(struct iwi_softc *sc, int quiet)
3006 {
3007         struct iwi_associate *assoc = &sc->assoc;
3008
3009         if ((sc->flags & IWI_FLAG_ASSOCIATED) == 0) {
3010                 DPRINTF(("Not associated\n"));
3011                 return (-1);
3012         }
3013
3014         IWI_STATE_BEGIN(sc, IWI_FW_DISASSOCIATING);
3015
3016         if (quiet)
3017                 assoc->type = IWI_HC_DISASSOC_QUIET;
3018         else
3019                 assoc->type = IWI_HC_DISASSOC;
3020
3021         DPRINTF(("Trying to disassociate from %6D channel %u\n",
3022             assoc->bssid, ":", assoc->chan));
3023         return iwi_cmd(sc, IWI_CMD_ASSOCIATE, assoc, sizeof *assoc);
3024 }
3025
3026 /*
3027  * release dma resources for the firmware
3028  */
3029 static void
3030 iwi_release_fw_dma(struct iwi_softc *sc)
3031 {
3032         if (sc->fw_flags & IWI_FW_HAVE_PHY)
3033                 bus_dmamap_unload(sc->fw_dmat, sc->fw_map);
3034         if (sc->fw_flags & IWI_FW_HAVE_MAP)
3035                 bus_dmamem_free(sc->fw_dmat, sc->fw_virtaddr, sc->fw_map);
3036         if (sc->fw_flags & IWI_FW_HAVE_DMAT)
3037                 bus_dma_tag_destroy(sc->fw_dmat);
3038
3039         sc->fw_flags = 0;
3040         sc->fw_dma_size = 0;
3041         sc->fw_dmat = NULL;
3042         sc->fw_map = NULL;
3043         sc->fw_physaddr = 0;
3044         sc->fw_virtaddr = NULL;
3045 }
3046
3047 /*
3048  * allocate the dma descriptor for the firmware.
3049  * Return 0 on success, 1 on error.
3050  * Must be called unlocked, protected by IWI_FLAG_FW_LOADING.
3051  */
3052 static int
3053 iwi_init_fw_dma(struct iwi_softc *sc, int size)
3054 {
3055         if (sc->fw_dma_size >= size)
3056                 return 0;
3057         if (bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
3058             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
3059             size, 1, size, 0, NULL, NULL, &sc->fw_dmat) != 0) {
3060                 device_printf(sc->sc_dev,
3061                     "could not create firmware DMA tag\n");
3062                 goto error;
3063         }
3064         sc->fw_flags |= IWI_FW_HAVE_DMAT;
3065         if (bus_dmamem_alloc(sc->fw_dmat, &sc->fw_virtaddr, 0,
3066             &sc->fw_map) != 0) {
3067                 device_printf(sc->sc_dev,
3068                     "could not allocate firmware DMA memory\n");
3069                 goto error;
3070         }
3071         sc->fw_flags |= IWI_FW_HAVE_MAP;
3072         if (bus_dmamap_load(sc->fw_dmat, sc->fw_map, sc->fw_virtaddr,
3073             size, iwi_dma_map_addr, &sc->fw_physaddr, 0) != 0) {
3074                 device_printf(sc->sc_dev, "could not load firmware DMA map\n");
3075                 goto error;
3076         }
3077         sc->fw_flags |= IWI_FW_HAVE_PHY;
3078         sc->fw_dma_size = size;
3079         return 0;
3080
3081 error:
3082         iwi_release_fw_dma(sc);
3083         return 1;
3084 }
3085
3086 static void
3087 iwi_init_locked(struct iwi_softc *sc)
3088 {
3089         struct iwi_rx_data *data;
3090         int i;
3091
3092         IWI_LOCK_ASSERT(sc);
3093
3094         if (sc->fw_state == IWI_FW_LOADING) {
3095                 device_printf(sc->sc_dev, "%s: already loading\n", __func__);
3096                 return;         /* XXX: condvar? */
3097         }
3098
3099         iwi_stop_locked(sc);
3100
3101         IWI_STATE_BEGIN(sc, IWI_FW_LOADING);
3102
3103         if (iwi_reset(sc) != 0) {
3104                 device_printf(sc->sc_dev, "could not reset adapter\n");
3105                 goto fail;
3106         }
3107         if (iwi_load_firmware(sc, &sc->fw_boot) != 0) {
3108                 device_printf(sc->sc_dev,
3109                     "could not load boot firmware %s\n", sc->fw_boot.name);
3110                 goto fail;
3111         }
3112         if (iwi_load_ucode(sc, &sc->fw_uc) != 0) {
3113                 device_printf(sc->sc_dev,
3114                     "could not load microcode %s\n", sc->fw_uc.name);
3115                 goto fail;
3116         }
3117
3118         iwi_stop_master(sc);
3119
3120         CSR_WRITE_4(sc, IWI_CSR_CMD_BASE, sc->cmdq.physaddr);
3121         CSR_WRITE_4(sc, IWI_CSR_CMD_SIZE, sc->cmdq.count);
3122         CSR_WRITE_4(sc, IWI_CSR_CMD_WIDX, sc->cmdq.cur);
3123
3124         CSR_WRITE_4(sc, IWI_CSR_TX1_BASE, sc->txq[0].physaddr);
3125         CSR_WRITE_4(sc, IWI_CSR_TX1_SIZE, sc->txq[0].count);
3126         CSR_WRITE_4(sc, IWI_CSR_TX1_WIDX, sc->txq[0].cur);
3127
3128         CSR_WRITE_4(sc, IWI_CSR_TX2_BASE, sc->txq[1].physaddr);
3129         CSR_WRITE_4(sc, IWI_CSR_TX2_SIZE, sc->txq[1].count);
3130         CSR_WRITE_4(sc, IWI_CSR_TX2_WIDX, sc->txq[1].cur);
3131
3132         CSR_WRITE_4(sc, IWI_CSR_TX3_BASE, sc->txq[2].physaddr);
3133         CSR_WRITE_4(sc, IWI_CSR_TX3_SIZE, sc->txq[2].count);
3134         CSR_WRITE_4(sc, IWI_CSR_TX3_WIDX, sc->txq[2].cur);
3135
3136         CSR_WRITE_4(sc, IWI_CSR_TX4_BASE, sc->txq[3].physaddr);
3137         CSR_WRITE_4(sc, IWI_CSR_TX4_SIZE, sc->txq[3].count);
3138         CSR_WRITE_4(sc, IWI_CSR_TX4_WIDX, sc->txq[3].cur);
3139
3140         for (i = 0; i < sc->rxq.count; i++) {
3141                 data = &sc->rxq.data[i];
3142                 CSR_WRITE_4(sc, data->reg, data->physaddr);
3143         }
3144
3145         CSR_WRITE_4(sc, IWI_CSR_RX_WIDX, sc->rxq.count - 1);
3146
3147         if (iwi_load_firmware(sc, &sc->fw_fw) != 0) {
3148                 device_printf(sc->sc_dev,
3149                     "could not load main firmware %s\n", sc->fw_fw.name);
3150                 goto fail;
3151         }
3152         sc->flags |= IWI_FLAG_FW_INITED;
3153
3154         IWI_STATE_END(sc, IWI_FW_LOADING);
3155
3156         if (iwi_config(sc) != 0) {
3157                 device_printf(sc->sc_dev, "unable to enable adapter\n");
3158                 goto fail2;
3159         }
3160
3161         callout_reset(&sc->sc_wdtimer, hz, iwi_watchdog, sc);
3162         sc->sc_running = 1;
3163         return;
3164 fail:
3165         IWI_STATE_END(sc, IWI_FW_LOADING);
3166 fail2:
3167         iwi_stop_locked(sc);
3168 }
3169
3170 static void
3171 iwi_init(void *priv)
3172 {
3173         struct iwi_softc *sc = priv;
3174         struct ieee80211com *ic = &sc->sc_ic;
3175         IWI_LOCK_DECL;
3176
3177         IWI_LOCK(sc);
3178         iwi_init_locked(sc);
3179         IWI_UNLOCK(sc);
3180
3181         if (sc->sc_running)
3182                 ieee80211_start_all(ic);
3183 }
3184
3185 static void
3186 iwi_stop_locked(void *priv)
3187 {
3188         struct iwi_softc *sc = priv;
3189
3190         IWI_LOCK_ASSERT(sc);
3191
3192         sc->sc_running = 0;
3193
3194         if (sc->sc_softled) {
3195                 callout_stop(&sc->sc_ledtimer);
3196                 sc->sc_blinking = 0;
3197         }
3198         callout_stop(&sc->sc_wdtimer);
3199         callout_stop(&sc->sc_rftimer);
3200
3201         iwi_stop_master(sc);
3202
3203         CSR_WRITE_4(sc, IWI_CSR_RST, IWI_RST_SOFT_RESET);
3204
3205         /* reset rings */
3206         iwi_reset_cmd_ring(sc, &sc->cmdq);
3207         iwi_reset_tx_ring(sc, &sc->txq[0]);
3208         iwi_reset_tx_ring(sc, &sc->txq[1]);
3209         iwi_reset_tx_ring(sc, &sc->txq[2]);
3210         iwi_reset_tx_ring(sc, &sc->txq[3]);
3211         iwi_reset_rx_ring(sc, &sc->rxq);
3212
3213         sc->sc_tx_timer = 0;
3214         sc->sc_state_timer = 0;
3215         sc->sc_busy_timer = 0;
3216         sc->flags &= ~(IWI_FLAG_BUSY | IWI_FLAG_ASSOCIATED);
3217         sc->fw_state = IWI_FW_IDLE;
3218         wakeup(sc);
3219 }
3220
3221 static void
3222 iwi_stop(struct iwi_softc *sc)
3223 {
3224         IWI_LOCK_DECL;
3225
3226         IWI_LOCK(sc);
3227         iwi_stop_locked(sc);
3228         IWI_UNLOCK(sc);
3229 }
3230
3231 static void
3232 iwi_restart(void *arg, int npending)
3233 {
3234         struct iwi_softc *sc = arg;
3235
3236         iwi_init(sc);
3237 }
3238
3239 /*
3240  * Return whether or not the radio is enabled in hardware
3241  * (i.e. the rfkill switch is "off").
3242  */
3243 static int
3244 iwi_getrfkill(struct iwi_softc *sc)
3245 {
3246         return (CSR_READ_4(sc, IWI_CSR_IO) & IWI_IO_RADIO_ENABLED) == 0;
3247 }
3248
3249 static void
3250 iwi_radio_on(void *arg, int pending)
3251 {
3252         struct iwi_softc *sc = arg;
3253         struct ieee80211com *ic = &sc->sc_ic;
3254
3255         device_printf(sc->sc_dev, "radio turned on\n");
3256
3257         iwi_init(sc);
3258         ieee80211_notify_radio(ic, 1);
3259 }
3260
3261 static void
3262 iwi_rfkill_poll(void *arg)
3263 {
3264         struct iwi_softc *sc = arg;
3265
3266         IWI_LOCK_ASSERT(sc);
3267
3268         /*
3269          * Check for a change in rfkill state.  We get an
3270          * interrupt when a radio is disabled but not when
3271          * it is enabled so we must poll for the latter.
3272          */
3273         if (!iwi_getrfkill(sc)) {
3274                 ieee80211_runtask(&sc->sc_ic, &sc->sc_radiontask);
3275                 return;
3276         }
3277         callout_reset(&sc->sc_rftimer, 2*hz, iwi_rfkill_poll, sc);
3278 }
3279
3280 static void
3281 iwi_radio_off(void *arg, int pending)
3282 {
3283         struct iwi_softc *sc = arg;
3284         struct ieee80211com *ic = &sc->sc_ic;
3285         IWI_LOCK_DECL;
3286
3287         device_printf(sc->sc_dev, "radio turned off\n");
3288
3289         ieee80211_notify_radio(ic, 0);
3290
3291         IWI_LOCK(sc);
3292         iwi_stop_locked(sc);
3293         iwi_rfkill_poll(sc);
3294         IWI_UNLOCK(sc);
3295 }
3296
3297 static int
3298 iwi_sysctl_stats(SYSCTL_HANDLER_ARGS)
3299 {
3300         struct iwi_softc *sc = arg1;
3301         uint32_t size, buf[128];
3302
3303         memset(buf, 0, sizeof buf);
3304
3305         if (!(sc->flags & IWI_FLAG_FW_INITED))
3306                 return SYSCTL_OUT(req, buf, sizeof buf);
3307
3308         size = min(CSR_READ_4(sc, IWI_CSR_TABLE0_SIZE), 128 - 1);
3309         CSR_READ_REGION_4(sc, IWI_CSR_TABLE0_BASE, &buf[1], size);
3310
3311         return SYSCTL_OUT(req, buf, size);
3312 }
3313
3314 static int
3315 iwi_sysctl_radio(SYSCTL_HANDLER_ARGS)
3316 {
3317         struct iwi_softc *sc = arg1;
3318         int val = !iwi_getrfkill(sc);
3319
3320         return SYSCTL_OUT(req, &val, sizeof val);
3321 }
3322
3323 /*
3324  * Add sysctl knobs.
3325  */
3326 static void
3327 iwi_sysctlattach(struct iwi_softc *sc)
3328 {
3329         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
3330         struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
3331
3332         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "radio",
3333             CTLTYPE_INT | CTLFLAG_RD, sc, 0, iwi_sysctl_radio, "I",
3334             "radio transmitter switch state (0=off, 1=on)");
3335
3336         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "stats",
3337             CTLTYPE_OPAQUE | CTLFLAG_RD, sc, 0, iwi_sysctl_stats, "S",
3338             "statistics");
3339
3340         sc->bluetooth = 0;
3341         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "bluetooth",
3342             CTLFLAG_RW, &sc->bluetooth, 0, "bluetooth coexistence");
3343
3344         sc->antenna = IWI_ANTENNA_AUTO;
3345         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "antenna",
3346             CTLFLAG_RW, &sc->antenna, 0, "antenna (0=auto)");
3347 }
3348
3349 /*
3350  * LED support.
3351  *
3352  * Different cards have different capabilities.  Some have three
3353  * led's while others have only one.  The linux ipw driver defines
3354  * led's for link state (associated or not), band (11a, 11g, 11b),
3355  * and for link activity.  We use one led and vary the blink rate
3356  * according to the tx/rx traffic a la the ath driver.
3357  */
3358
3359 static __inline uint32_t
3360 iwi_toggle_event(uint32_t r)
3361 {
3362         return r &~ (IWI_RST_STANDBY | IWI_RST_GATE_ODMA |
3363                      IWI_RST_GATE_IDMA | IWI_RST_GATE_ADMA);
3364 }
3365
3366 static uint32_t
3367 iwi_read_event(struct iwi_softc *sc)
3368 {
3369         return MEM_READ_4(sc, IWI_MEM_EEPROM_EVENT);
3370 }
3371
3372 static void
3373 iwi_write_event(struct iwi_softc *sc, uint32_t v)
3374 {
3375         MEM_WRITE_4(sc, IWI_MEM_EEPROM_EVENT, v);
3376 }
3377
3378 static void
3379 iwi_led_done(void *arg)
3380 {
3381         struct iwi_softc *sc = arg;
3382
3383         sc->sc_blinking = 0;
3384 }
3385
3386 /*
3387  * Turn the activity LED off: flip the pin and then set a timer so no
3388  * update will happen for the specified duration.
3389  */
3390 static void
3391 iwi_led_off(void *arg)
3392 {
3393         struct iwi_softc *sc = arg;
3394         uint32_t v;
3395
3396         v = iwi_read_event(sc);
3397         v &= ~sc->sc_ledpin;
3398         iwi_write_event(sc, iwi_toggle_event(v));
3399         callout_reset(&sc->sc_ledtimer, sc->sc_ledoff, iwi_led_done, sc);
3400 }
3401
3402 /*
3403  * Blink the LED according to the specified on/off times.
3404  */
3405 static void
3406 iwi_led_blink(struct iwi_softc *sc, int on, int off)
3407 {
3408         uint32_t v;
3409
3410         v = iwi_read_event(sc);
3411         v |= sc->sc_ledpin;
3412         iwi_write_event(sc, iwi_toggle_event(v));
3413         sc->sc_blinking = 1;
3414         sc->sc_ledoff = off;
3415         callout_reset(&sc->sc_ledtimer, on, iwi_led_off, sc);
3416 }
3417
3418 static void
3419 iwi_led_event(struct iwi_softc *sc, int event)
3420 {
3421         /* NB: on/off times from the Atheros NDIS driver, w/ permission */
3422         static const struct {
3423                 u_int           rate;           /* tx/rx iwi rate */
3424                 u_int16_t       timeOn;         /* LED on time (ms) */
3425                 u_int16_t       timeOff;        /* LED off time (ms) */
3426         } blinkrates[] = {
3427                 { IWI_RATE_OFDM54, 40,  10 },
3428                 { IWI_RATE_OFDM48, 44,  11 },
3429                 { IWI_RATE_OFDM36, 50,  13 },
3430                 { IWI_RATE_OFDM24, 57,  14 },
3431                 { IWI_RATE_OFDM18, 67,  16 },
3432                 { IWI_RATE_OFDM12, 80,  20 },
3433                 { IWI_RATE_DS11,  100,  25 },
3434                 { IWI_RATE_OFDM9, 133,  34 },
3435                 { IWI_RATE_OFDM6, 160,  40 },
3436                 { IWI_RATE_DS5,   200,  50 },
3437                 {            6,   240,  58 },   /* XXX 3Mb/s if it existed */
3438                 { IWI_RATE_DS2,   267,  66 },
3439                 { IWI_RATE_DS1,   400, 100 },
3440                 {            0,   500, 130 },   /* unknown rate/polling */
3441         };
3442         uint32_t txrate;
3443         int j = 0;                      /* XXX silence compiler */
3444
3445         sc->sc_ledevent = ticks;        /* time of last event */
3446         if (sc->sc_blinking)            /* don't interrupt active blink */
3447                 return;
3448         switch (event) {
3449         case IWI_LED_POLL:
3450                 j = nitems(blinkrates)-1;
3451                 break;
3452         case IWI_LED_TX:
3453                 /* read current transmission rate from adapter */
3454                 txrate = CSR_READ_4(sc, IWI_CSR_CURRENT_TX_RATE);
3455                 if (blinkrates[sc->sc_txrix].rate != txrate) {
3456                         for (j = 0; j < nitems(blinkrates)-1; j++)
3457                                 if (blinkrates[j].rate == txrate)
3458                                         break;
3459                         sc->sc_txrix = j;
3460                 } else
3461                         j = sc->sc_txrix;
3462                 break;
3463         case IWI_LED_RX:
3464                 if (blinkrates[sc->sc_rxrix].rate != sc->sc_rxrate) {
3465                         for (j = 0; j < nitems(blinkrates)-1; j++)
3466                                 if (blinkrates[j].rate == sc->sc_rxrate)
3467                                         break;
3468                         sc->sc_rxrix = j;
3469                 } else
3470                         j = sc->sc_rxrix;
3471                 break;
3472         }
3473         /* XXX beware of overflow */
3474         iwi_led_blink(sc, (blinkrates[j].timeOn * hz) / 1000,
3475                 (blinkrates[j].timeOff * hz) / 1000);
3476 }
3477
3478 static int
3479 iwi_sysctl_softled(SYSCTL_HANDLER_ARGS)
3480 {
3481         struct iwi_softc *sc = arg1;
3482         int softled = sc->sc_softled;
3483         int error;
3484
3485         error = sysctl_handle_int(oidp, &softled, 0, req);
3486         if (error || !req->newptr)
3487                 return error;
3488         softled = (softled != 0);
3489         if (softled != sc->sc_softled) {
3490                 if (softled) {
3491                         uint32_t v = iwi_read_event(sc);
3492                         v &= ~sc->sc_ledpin;
3493                         iwi_write_event(sc, iwi_toggle_event(v));
3494                 }
3495                 sc->sc_softled = softled;
3496         }
3497         return 0;
3498 }
3499
3500 static void
3501 iwi_ledattach(struct iwi_softc *sc)
3502 {
3503         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
3504         struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
3505
3506         sc->sc_blinking = 0;
3507         sc->sc_ledstate = 1;
3508         sc->sc_ledidle = (2700*hz)/1000;        /* 2.7sec */
3509         callout_init_mtx(&sc->sc_ledtimer, &sc->sc_mtx, 0);
3510
3511         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3512                 "softled", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
3513                 iwi_sysctl_softled, "I", "enable/disable software LED support");
3514         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3515                 "ledpin", CTLFLAG_RW, &sc->sc_ledpin, 0,
3516                 "pin setting to turn activity LED on");
3517         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3518                 "ledidle", CTLFLAG_RW, &sc->sc_ledidle, 0,
3519                 "idle time for inactivity LED (ticks)");
3520         /* XXX for debugging */
3521         SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
3522                 "nictype", CTLFLAG_RD, &sc->sc_nictype, 0,
3523                 "NIC type from EEPROM");
3524
3525         sc->sc_ledpin = IWI_RST_LED_ACTIVITY;
3526         sc->sc_softled = 1;
3527
3528         sc->sc_nictype = (iwi_read_prom_word(sc, IWI_EEPROM_NIC) >> 8) & 0xff;
3529         if (sc->sc_nictype == 1) {
3530                 /*
3531                  * NB: led's are reversed.
3532                  */
3533                 sc->sc_ledpin = IWI_RST_LED_ASSOCIATED;
3534         }
3535 }
3536
3537 static void
3538 iwi_scan_start(struct ieee80211com *ic)
3539 {
3540         /* ignore */
3541 }
3542
3543 static void
3544 iwi_set_channel(struct ieee80211com *ic)
3545 {
3546         struct iwi_softc *sc = ic->ic_softc;
3547
3548         if (sc->fw_state == IWI_FW_IDLE)
3549                 iwi_setcurchan(sc, ic->ic_curchan->ic_ieee);
3550 }
3551
3552 static void
3553 iwi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
3554 {
3555         struct ieee80211vap *vap = ss->ss_vap;
3556         struct iwi_softc *sc = vap->iv_ic->ic_softc;
3557         IWI_LOCK_DECL;
3558
3559         IWI_LOCK(sc);
3560         if (iwi_scanchan(sc, maxdwell, 0))
3561                 ieee80211_cancel_scan(vap);
3562         IWI_UNLOCK(sc);
3563 }
3564
3565 static void
3566 iwi_scan_mindwell(struct ieee80211_scan_state *ss)
3567 {
3568         /* NB: don't try to abort scan; wait for firmware to finish */
3569 }
3570
3571 static void
3572 iwi_scan_end(struct ieee80211com *ic)
3573 {
3574         struct iwi_softc *sc = ic->ic_softc;
3575         IWI_LOCK_DECL;
3576
3577         IWI_LOCK(sc);
3578         sc->flags &= ~IWI_FLAG_CHANNEL_SCAN;
3579         /* NB: make sure we're still scanning */
3580         if (sc->fw_state == IWI_FW_SCANNING)
3581                 iwi_cmd(sc, IWI_CMD_ABORT_SCAN, NULL, 0);
3582         IWI_UNLOCK(sc);
3583 }
3584
3585 static void
3586 iwi_collect_bands(struct ieee80211com *ic, uint8_t bands[], size_t bands_sz)
3587 {
3588         struct iwi_softc *sc = ic->ic_softc;
3589         device_t dev = sc->sc_dev;
3590
3591         memset(bands, 0, bands_sz);
3592         setbit(bands, IEEE80211_MODE_11B);
3593         setbit(bands, IEEE80211_MODE_11G);
3594         if (pci_get_device(dev) >= 0x4223)
3595                 setbit(bands, IEEE80211_MODE_11A);
3596 }
3597
3598 static void
3599 iwi_getradiocaps(struct ieee80211com *ic,
3600     int maxchans, int *nchans, struct ieee80211_channel chans[])
3601 {
3602         uint8_t bands[IEEE80211_MODE_BYTES];
3603
3604         iwi_collect_bands(ic, bands, sizeof(bands));
3605         *nchans = 0;
3606         if (isset(bands, IEEE80211_MODE_11B) || isset(bands, IEEE80211_MODE_11G))
3607                 ieee80211_add_channel_list_2ghz(chans, maxchans, nchans,
3608                     def_chan_2ghz, nitems(def_chan_2ghz), bands, 0);
3609         if (isset(bands, IEEE80211_MODE_11A)) {
3610                 ieee80211_add_channel_list_5ghz(chans, maxchans, nchans,
3611                     def_chan_5ghz_band1, nitems(def_chan_5ghz_band1),
3612                     bands, 0);
3613                 ieee80211_add_channel_list_5ghz(chans, maxchans, nchans,
3614                     def_chan_5ghz_band2, nitems(def_chan_5ghz_band2),
3615                     bands, 0);
3616                 ieee80211_add_channel_list_5ghz(chans, maxchans, nchans,
3617                     def_chan_5ghz_band3, nitems(def_chan_5ghz_band3),
3618                     bands, 0);
3619         }
3620 }