if_wpi.c revision 1.80.2.3
1 /* $NetBSD: if_wpi.c,v 1.80.2.3 2020/04/13 08:04:27 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2006, 2007 5 * Damien Bergamini <damien.bergamini (at) free.fr> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/cdefs.h> 21 __KERNEL_RCSID(0, "$NetBSD: if_wpi.c,v 1.80.2.3 2020/04/13 08:04:27 martin Exp $"); 22 23 /* 24 * Driver for Intel PRO/Wireless 3945ABG 802.11 network adapters. 25 */ 26 27 28 #include <sys/param.h> 29 #include <sys/sockio.h> 30 #include <sys/sysctl.h> 31 #include <sys/mbuf.h> 32 #include <sys/kernel.h> 33 #include <sys/socket.h> 34 #include <sys/systm.h> 35 #include <sys/malloc.h> 36 #include <sys/mutex.h> 37 #include <sys/once.h> 38 #include <sys/conf.h> 39 #include <sys/kauth.h> 40 #include <sys/callout.h> 41 #include <sys/proc.h> 42 #include <sys/kthread.h> 43 44 #include <sys/bus.h> 45 #include <machine/endian.h> 46 #include <sys/intr.h> 47 48 #include <dev/pci/pcireg.h> 49 #include <dev/pci/pcivar.h> 50 #include <dev/pci/pcidevs.h> 51 52 #include <dev/sysmon/sysmonvar.h> 53 54 #include <net/bpf.h> 55 #include <net/if.h> 56 #include <net/if_arp.h> 57 #include <net/if_dl.h> 58 #include <net/if_ether.h> 59 #include <net/if_media.h> 60 #include <net/if_types.h> 61 62 #include <netinet/in.h> 63 #include <netinet/in_systm.h> 64 #include <netinet/in_var.h> 65 #include <netinet/ip.h> 66 67 #include <net80211/ieee80211_var.h> 68 #include <net80211/ieee80211_amrr.h> 69 #include <net80211/ieee80211_radiotap.h> 70 71 #include <dev/firmload.h> 72 73 #include <dev/pci/if_wpireg.h> 74 #include <dev/pci/if_wpivar.h> 75 76 static const char wpi_firmware_name[] = "iwlwifi-3945.ucode"; 77 static once_t wpi_firmware_init; 78 static kmutex_t wpi_firmware_mutex; 79 static size_t wpi_firmware_users; 80 static uint8_t *wpi_firmware_image; 81 static size_t wpi_firmware_size; 82 83 static int wpi_match(device_t, cfdata_t, void *); 84 static void wpi_attach(device_t, device_t, void *); 85 static int wpi_detach(device_t , int); 86 static int wpi_dma_contig_alloc(bus_dma_tag_t, struct wpi_dma_info *, 87 void **, bus_size_t, bus_size_t, int); 88 static void wpi_dma_contig_free(struct wpi_dma_info *); 89 static int wpi_alloc_shared(struct wpi_softc *); 90 static void wpi_free_shared(struct wpi_softc *); 91 static int wpi_alloc_fwmem(struct wpi_softc *); 92 static void wpi_free_fwmem(struct wpi_softc *); 93 static struct wpi_rbuf *wpi_alloc_rbuf(struct wpi_softc *); 94 static void wpi_free_rbuf(struct mbuf *, void *, size_t, void *); 95 static int wpi_alloc_rpool(struct wpi_softc *); 96 static void wpi_free_rpool(struct wpi_softc *); 97 static int wpi_alloc_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 98 static void wpi_reset_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 99 static void wpi_free_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 100 static int wpi_alloc_tx_ring(struct wpi_softc *, struct wpi_tx_ring *, 101 int, int); 102 static void wpi_reset_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 103 static void wpi_free_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 104 static struct ieee80211_node * wpi_node_alloc(struct ieee80211_node_table *); 105 static void wpi_newassoc(struct ieee80211_node *, int); 106 static int wpi_media_change(struct ifnet *); 107 static int wpi_newstate(struct ieee80211com *, enum ieee80211_state, int); 108 static void wpi_mem_lock(struct wpi_softc *); 109 static void wpi_mem_unlock(struct wpi_softc *); 110 static uint32_t wpi_mem_read(struct wpi_softc *, uint16_t); 111 static void wpi_mem_write(struct wpi_softc *, uint16_t, uint32_t); 112 static void wpi_mem_write_region_4(struct wpi_softc *, uint16_t, 113 const uint32_t *, int); 114 static int wpi_read_prom_data(struct wpi_softc *, uint32_t, void *, int); 115 static int wpi_load_microcode(struct wpi_softc *, const uint8_t *, int); 116 static int wpi_cache_firmware(struct wpi_softc *); 117 static void wpi_release_firmware(void); 118 static int wpi_load_firmware(struct wpi_softc *); 119 static void wpi_calib_timeout(void *); 120 static void wpi_iter_func(void *, struct ieee80211_node *); 121 static void wpi_power_calibration(struct wpi_softc *, int); 122 static void wpi_rx_intr(struct wpi_softc *, struct wpi_rx_desc *, 123 struct wpi_rx_data *); 124 static void wpi_tx_intr(struct wpi_softc *, struct wpi_rx_desc *); 125 static void wpi_cmd_intr(struct wpi_softc *, struct wpi_rx_desc *); 126 static void wpi_notif_intr(struct wpi_softc *); 127 static int wpi_intr(void *); 128 static void wpi_softintr(void *); 129 static void wpi_read_eeprom(struct wpi_softc *); 130 static void wpi_read_eeprom_channels(struct wpi_softc *, int); 131 static void wpi_read_eeprom_group(struct wpi_softc *, int); 132 static uint8_t wpi_plcp_signal(int); 133 static int wpi_tx_data(struct wpi_softc *, struct mbuf *, 134 struct ieee80211_node *, int); 135 static void wpi_start(struct ifnet *); 136 static void wpi_watchdog(struct ifnet *); 137 static int wpi_ioctl(struct ifnet *, u_long, void *); 138 static int wpi_cmd(struct wpi_softc *, int, const void *, int, int); 139 static int wpi_wme_update(struct ieee80211com *); 140 static int wpi_mrr_setup(struct wpi_softc *); 141 static void wpi_set_led(struct wpi_softc *, uint8_t, uint8_t, uint8_t); 142 static void wpi_enable_tsf(struct wpi_softc *, struct ieee80211_node *); 143 static int wpi_set_txpower(struct wpi_softc *, 144 struct ieee80211_channel *, int); 145 static int wpi_get_power_index(struct wpi_softc *, 146 struct wpi_power_group *, struct ieee80211_channel *, int); 147 static int wpi_setup_beacon(struct wpi_softc *, struct ieee80211_node *); 148 static int wpi_auth(struct wpi_softc *); 149 static int wpi_scan(struct wpi_softc *); 150 static int wpi_config(struct wpi_softc *); 151 static void wpi_stop_master(struct wpi_softc *); 152 static int wpi_power_up(struct wpi_softc *); 153 static int wpi_reset(struct wpi_softc *); 154 static void wpi_hw_config(struct wpi_softc *); 155 static int wpi_init(struct ifnet *); 156 static void wpi_stop(struct ifnet *, int); 157 static bool wpi_resume(device_t, const pmf_qual_t *); 158 static int wpi_getrfkill(struct wpi_softc *); 159 static void wpi_sysctlattach(struct wpi_softc *); 160 static void wpi_rsw_thread(void *); 161 162 #ifdef WPI_DEBUG 163 #define DPRINTF(x) do { if (wpi_debug > 0) printf x; } while (0) 164 #define DPRINTFN(n, x) do { if (wpi_debug >= (n)) printf x; } while (0) 165 int wpi_debug = 1; 166 #else 167 #define DPRINTF(x) 168 #define DPRINTFN(n, x) 169 #endif 170 171 CFATTACH_DECL_NEW(wpi, sizeof (struct wpi_softc), wpi_match, wpi_attach, 172 wpi_detach, NULL); 173 174 static int 175 wpi_match(device_t parent, cfdata_t match __unused, void *aux) 176 { 177 struct pci_attach_args *pa = aux; 178 179 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL) 180 return 0; 181 182 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PRO_WL_3945ABG_1 || 183 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PRO_WL_3945ABG_2) 184 return 1; 185 186 return 0; 187 } 188 189 /* Base Address Register */ 190 #define WPI_PCI_BAR0 0x10 191 192 static int 193 wpi_attach_once(void) 194 { 195 196 mutex_init(&wpi_firmware_mutex, MUTEX_DEFAULT, IPL_NONE); 197 return 0; 198 } 199 200 static void 201 wpi_attach(device_t parent __unused, device_t self, void *aux) 202 { 203 struct wpi_softc *sc = device_private(self); 204 struct ieee80211com *ic = &sc->sc_ic; 205 struct ifnet *ifp = &sc->sc_ec.ec_if; 206 struct pci_attach_args *pa = aux; 207 const char *intrstr; 208 bus_space_tag_t memt; 209 bus_space_handle_t memh; 210 pcireg_t data; 211 int ac, error; 212 char intrbuf[PCI_INTRSTR_LEN]; 213 214 RUN_ONCE(&wpi_firmware_init, wpi_attach_once); 215 sc->fw_used = false; 216 217 sc->sc_dev = self; 218 sc->sc_pct = pa->pa_pc; 219 sc->sc_pcitag = pa->pa_tag; 220 221 sc->sc_rsw_status = WPI_RSW_UNKNOWN; 222 sc->sc_rsw.smpsw_name = device_xname(self); 223 sc->sc_rsw.smpsw_type = PSWITCH_TYPE_RADIO; 224 error = sysmon_pswitch_register(&sc->sc_rsw); 225 if (error) { 226 aprint_error_dev(self, 227 "unable to register radio switch with sysmon\n"); 228 return; 229 } 230 mutex_init(&sc->sc_rsw_mtx, MUTEX_DEFAULT, IPL_NONE); 231 cv_init(&sc->sc_rsw_cv, "wpirsw"); 232 sc->sc_rsw_suspend = false; 233 sc->sc_rsw_suspended = false; 234 if (kthread_create(PRI_NONE, 0, NULL, 235 wpi_rsw_thread, sc, &sc->sc_rsw_lwp, "%s", device_xname(self))) { 236 aprint_error_dev(self, "couldn't create switch thread\n"); 237 } 238 239 callout_init(&sc->calib_to, 0); 240 callout_setfunc(&sc->calib_to, wpi_calib_timeout, sc); 241 242 pci_aprint_devinfo(pa, NULL); 243 244 /* enable bus-mastering */ 245 data = pci_conf_read(sc->sc_pct, sc->sc_pcitag, PCI_COMMAND_STATUS_REG); 246 data |= PCI_COMMAND_MASTER_ENABLE; 247 pci_conf_write(sc->sc_pct, sc->sc_pcitag, PCI_COMMAND_STATUS_REG, data); 248 249 /* map the register window */ 250 error = pci_mapreg_map(pa, WPI_PCI_BAR0, PCI_MAPREG_TYPE_MEM | 251 PCI_MAPREG_MEM_TYPE_32BIT, 0, &memt, &memh, NULL, &sc->sc_sz); 252 if (error != 0) { 253 aprint_error_dev(self, "could not map memory space\n"); 254 return; 255 } 256 257 sc->sc_st = memt; 258 sc->sc_sh = memh; 259 sc->sc_dmat = pa->pa_dmat; 260 261 sc->sc_soft_ih = softint_establish(SOFTINT_NET, wpi_softintr, sc); 262 if (sc->sc_soft_ih == NULL) { 263 aprint_error_dev(self, "could not establish softint\n"); 264 goto unmap; 265 } 266 267 if (pci_intr_alloc(pa, &sc->sc_pihp, NULL, 0)) { 268 aprint_error_dev(self, "could not map interrupt\n"); 269 goto failsi; 270 } 271 272 intrstr = pci_intr_string(sc->sc_pct, sc->sc_pihp[0], intrbuf, 273 sizeof(intrbuf)); 274 sc->sc_ih = pci_intr_establish_xname(sc->sc_pct, sc->sc_pihp[0], 275 IPL_NET, wpi_intr, sc, device_xname(self)); 276 if (sc->sc_ih == NULL) { 277 aprint_error_dev(self, "could not establish interrupt"); 278 if (intrstr != NULL) 279 aprint_error(" at %s", intrstr); 280 aprint_error("\n"); 281 goto failia; 282 } 283 aprint_normal_dev(self, "interrupting at %s\n", intrstr); 284 285 /* 286 * Put adapter into a known state. 287 */ 288 if ((error = wpi_reset(sc)) != 0) { 289 aprint_error_dev(self, "could not reset adapter\n"); 290 goto failih; 291 } 292 293 /* 294 * Allocate DMA memory for firmware transfers. 295 */ 296 if ((error = wpi_alloc_fwmem(sc)) != 0) { 297 aprint_error_dev(self, "could not allocate firmware memory\n"); 298 goto failih; 299 } 300 301 /* 302 * Allocate shared page and Tx/Rx rings. 303 */ 304 if ((error = wpi_alloc_shared(sc)) != 0) { 305 aprint_error_dev(self, "could not allocate shared area\n"); 306 goto fail1; 307 } 308 309 if ((error = wpi_alloc_rpool(sc)) != 0) { 310 aprint_error_dev(self, "could not allocate Rx buffers\n"); 311 goto fail2; 312 } 313 314 for (ac = 0; ac < 4; ac++) { 315 error = wpi_alloc_tx_ring(sc, &sc->txq[ac], WPI_TX_RING_COUNT, 316 ac); 317 if (error != 0) { 318 aprint_error_dev(self, 319 "could not allocate Tx ring %d\n", ac); 320 goto fail3; 321 } 322 } 323 324 error = wpi_alloc_tx_ring(sc, &sc->cmdq, WPI_CMD_RING_COUNT, 4); 325 if (error != 0) { 326 aprint_error_dev(self, "could not allocate command ring\n"); 327 goto fail3; 328 } 329 330 error = wpi_alloc_rx_ring(sc, &sc->rxq); 331 if (error != 0) { 332 aprint_error_dev(self, "could not allocate Rx ring\n"); 333 goto fail4; 334 } 335 336 ic->ic_ifp = ifp; 337 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 338 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 339 ic->ic_state = IEEE80211_S_INIT; 340 341 /* set device capabilities */ 342 ic->ic_caps = 343 IEEE80211_C_WPA | /* 802.11i */ 344 IEEE80211_C_MONITOR | /* monitor mode supported */ 345 IEEE80211_C_TXPMGT | /* tx power management */ 346 IEEE80211_C_SHSLOT | /* short slot time supported */ 347 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 348 IEEE80211_C_WME; /* 802.11e */ 349 350 /* read supported channels and MAC address from EEPROM */ 351 wpi_read_eeprom(sc); 352 353 /* set supported .11a, .11b and .11g rates */ 354 ic->ic_sup_rates[IEEE80211_MODE_11A] = ieee80211_std_rateset_11a; 355 ic->ic_sup_rates[IEEE80211_MODE_11B] = ieee80211_std_rateset_11b; 356 ic->ic_sup_rates[IEEE80211_MODE_11G] = ieee80211_std_rateset_11g; 357 358 /* IBSS channel undefined for now */ 359 ic->ic_ibss_chan = &ic->ic_channels[0]; 360 361 ifp->if_softc = sc; 362 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 363 ifp->if_init = wpi_init; 364 ifp->if_stop = wpi_stop; 365 ifp->if_ioctl = wpi_ioctl; 366 ifp->if_start = wpi_start; 367 ifp->if_watchdog = wpi_watchdog; 368 IFQ_SET_READY(&ifp->if_snd); 369 memcpy(ifp->if_xname, device_xname(self), IFNAMSIZ); 370 371 error = if_initialize(ifp); 372 if (error != 0) { 373 aprint_error_dev(sc->sc_dev, "if_initialize failed(%d)\n", 374 error); 375 goto fail5; 376 } 377 ieee80211_ifattach(ic); 378 /* Use common softint-based if_input */ 379 ifp->if_percpuq = if_percpuq_create(ifp); 380 if_register(ifp); 381 382 /* override default methods */ 383 ic->ic_node_alloc = wpi_node_alloc; 384 ic->ic_newassoc = wpi_newassoc; 385 ic->ic_wme.wme_update = wpi_wme_update; 386 387 /* override state transition machine */ 388 sc->sc_newstate = ic->ic_newstate; 389 ic->ic_newstate = wpi_newstate; 390 391 /* XXX media locking needs revisiting */ 392 mutex_init(&sc->sc_media_mtx, MUTEX_DEFAULT, IPL_SOFTNET); 393 ieee80211_media_init_with_lock(ic, 394 wpi_media_change, ieee80211_media_status, &sc->sc_media_mtx); 395 396 sc->amrr.amrr_min_success_threshold = 1; 397 sc->amrr.amrr_max_success_threshold = 15; 398 399 wpi_sysctlattach(sc); 400 401 if (pmf_device_register(self, NULL, wpi_resume)) 402 pmf_class_network_register(self, ifp); 403 else 404 aprint_error_dev(self, "couldn't establish power handler\n"); 405 406 bpf_attach2(ifp, DLT_IEEE802_11_RADIO, 407 sizeof(struct ieee80211_frame) + IEEE80211_RADIOTAP_HDRLEN, 408 &sc->sc_drvbpf); 409 410 sc->sc_rxtap_len = sizeof sc->sc_rxtapu; 411 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 412 sc->sc_rxtap.wr_ihdr.it_present = htole32(WPI_RX_RADIOTAP_PRESENT); 413 414 sc->sc_txtap_len = sizeof sc->sc_txtapu; 415 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 416 sc->sc_txtap.wt_ihdr.it_present = htole32(WPI_TX_RADIOTAP_PRESENT); 417 418 ieee80211_announce(ic); 419 420 return; 421 422 /* free allocated memory if something failed during attachment */ 423 fail5: wpi_free_rx_ring(sc, &sc->rxq); 424 fail4: wpi_free_tx_ring(sc, &sc->cmdq); 425 fail3: while (--ac >= 0) 426 wpi_free_tx_ring(sc, &sc->txq[ac]); 427 wpi_free_rpool(sc); 428 fail2: wpi_free_shared(sc); 429 fail1: wpi_free_fwmem(sc); 430 failih: pci_intr_disestablish(sc->sc_pct, sc->sc_ih); 431 sc->sc_ih = NULL; 432 failia: pci_intr_release(sc->sc_pct, sc->sc_pihp, 1); 433 sc->sc_pihp = NULL; 434 failsi: softint_disestablish(sc->sc_soft_ih); 435 sc->sc_soft_ih = NULL; 436 unmap: bus_space_unmap(sc->sc_st, sc->sc_sh, sc->sc_sz); 437 } 438 439 static int 440 wpi_detach(device_t self, int flags __unused) 441 { 442 struct wpi_softc *sc = device_private(self); 443 struct ifnet *ifp = sc->sc_ic.ic_ifp; 444 int ac; 445 446 wpi_stop(ifp, 1); 447 448 if (ifp != NULL) 449 bpf_detach(ifp); 450 ieee80211_ifdetach(&sc->sc_ic); 451 if (ifp != NULL) 452 if_detach(ifp); 453 454 for (ac = 0; ac < 4; ac++) 455 wpi_free_tx_ring(sc, &sc->txq[ac]); 456 wpi_free_tx_ring(sc, &sc->cmdq); 457 wpi_free_rx_ring(sc, &sc->rxq); 458 wpi_free_rpool(sc); 459 wpi_free_shared(sc); 460 461 if (sc->sc_ih != NULL) { 462 pci_intr_disestablish(sc->sc_pct, sc->sc_ih); 463 sc->sc_ih = NULL; 464 } 465 if (sc->sc_pihp != NULL) { 466 pci_intr_release(sc->sc_pct, sc->sc_pihp, 1); 467 sc->sc_pihp = NULL; 468 } 469 if (sc->sc_soft_ih != NULL) { 470 softint_disestablish(sc->sc_soft_ih); 471 sc->sc_soft_ih = NULL; 472 } 473 474 mutex_enter(&sc->sc_rsw_mtx); 475 sc->sc_dying = 1; 476 cv_signal(&sc->sc_rsw_cv); 477 while (sc->sc_rsw_lwp != NULL) 478 cv_wait(&sc->sc_rsw_cv, &sc->sc_rsw_mtx); 479 mutex_exit(&sc->sc_rsw_mtx); 480 sysmon_pswitch_unregister(&sc->sc_rsw); 481 482 bus_space_unmap(sc->sc_st, sc->sc_sh, sc->sc_sz); 483 484 if (sc->fw_used) { 485 sc->fw_used = false; 486 wpi_release_firmware(); 487 } 488 cv_destroy(&sc->sc_rsw_cv); 489 mutex_destroy(&sc->sc_rsw_mtx); 490 return 0; 491 } 492 493 static int 494 wpi_dma_contig_alloc(bus_dma_tag_t tag, struct wpi_dma_info *dma, void **kvap, 495 bus_size_t size, bus_size_t alignment, int flags) 496 { 497 int nsegs, error; 498 499 dma->tag = tag; 500 dma->size = size; 501 502 error = bus_dmamap_create(tag, size, 1, size, 0, flags, &dma->map); 503 if (error != 0) 504 goto fail; 505 506 error = bus_dmamem_alloc(tag, size, alignment, 0, &dma->seg, 1, &nsegs, 507 flags); 508 if (error != 0) 509 goto fail; 510 511 error = bus_dmamem_map(tag, &dma->seg, 1, size, &dma->vaddr, flags); 512 if (error != 0) 513 goto fail; 514 515 error = bus_dmamap_load(tag, dma->map, dma->vaddr, size, NULL, flags); 516 if (error != 0) 517 goto fail; 518 519 memset(dma->vaddr, 0, size); 520 bus_dmamap_sync(dma->tag, dma->map, 0, size, BUS_DMASYNC_PREWRITE); 521 522 dma->paddr = dma->map->dm_segs[0].ds_addr; 523 if (kvap != NULL) 524 *kvap = dma->vaddr; 525 526 return 0; 527 528 fail: wpi_dma_contig_free(dma); 529 return error; 530 } 531 532 static void 533 wpi_dma_contig_free(struct wpi_dma_info *dma) 534 { 535 if (dma->map != NULL) { 536 if (dma->vaddr != NULL) { 537 bus_dmamap_unload(dma->tag, dma->map); 538 bus_dmamem_unmap(dma->tag, dma->vaddr, dma->size); 539 bus_dmamem_free(dma->tag, &dma->seg, 1); 540 dma->vaddr = NULL; 541 } 542 bus_dmamap_destroy(dma->tag, dma->map); 543 dma->map = NULL; 544 } 545 } 546 547 /* 548 * Allocate a shared page between host and NIC. 549 */ 550 static int 551 wpi_alloc_shared(struct wpi_softc *sc) 552 { 553 int error; 554 555 /* must be aligned on a 4K-page boundary */ 556 error = wpi_dma_contig_alloc(sc->sc_dmat, &sc->shared_dma, 557 (void **)&sc->shared, sizeof (struct wpi_shared), WPI_BUF_ALIGN, 558 BUS_DMA_NOWAIT); 559 if (error != 0) 560 aprint_error_dev(sc->sc_dev, 561 "could not allocate shared area DMA memory\n"); 562 563 return error; 564 } 565 566 static void 567 wpi_free_shared(struct wpi_softc *sc) 568 { 569 wpi_dma_contig_free(&sc->shared_dma); 570 } 571 572 /* 573 * Allocate DMA-safe memory for firmware transfer. 574 */ 575 static int 576 wpi_alloc_fwmem(struct wpi_softc *sc) 577 { 578 int error; 579 580 /* allocate enough contiguous space to store text and data */ 581 error = wpi_dma_contig_alloc(sc->sc_dmat, &sc->fw_dma, NULL, 582 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 0, 583 BUS_DMA_NOWAIT); 584 585 if (error != 0) 586 aprint_error_dev(sc->sc_dev, 587 "could not allocate firmware transfer area DMA memory\n"); 588 return error; 589 } 590 591 static void 592 wpi_free_fwmem(struct wpi_softc *sc) 593 { 594 wpi_dma_contig_free(&sc->fw_dma); 595 } 596 597 static struct wpi_rbuf * 598 wpi_alloc_rbuf(struct wpi_softc *sc) 599 { 600 struct wpi_rbuf *rbuf; 601 602 mutex_enter(&sc->rxq.freelist_mtx); 603 rbuf = SLIST_FIRST(&sc->rxq.freelist); 604 if (rbuf != NULL) { 605 SLIST_REMOVE_HEAD(&sc->rxq.freelist, next); 606 } 607 mutex_exit(&sc->rxq.freelist_mtx); 608 609 return rbuf; 610 } 611 612 /* 613 * This is called automatically by the network stack when the mbuf to which our 614 * Rx buffer is attached is freed. 615 */ 616 static void 617 wpi_free_rbuf(struct mbuf* m, void *buf, size_t size, void *arg) 618 { 619 struct wpi_rbuf *rbuf = arg; 620 struct wpi_softc *sc = rbuf->sc; 621 622 /* put the buffer back in the free list */ 623 624 mutex_enter(&sc->rxq.freelist_mtx); 625 SLIST_INSERT_HEAD(&sc->rxq.freelist, rbuf, next); 626 mutex_exit(&sc->rxq.freelist_mtx); 627 628 if (__predict_true(m != NULL)) 629 pool_cache_put(mb_cache, m); 630 } 631 632 static int 633 wpi_alloc_rpool(struct wpi_softc *sc) 634 { 635 struct wpi_rx_ring *ring = &sc->rxq; 636 int i, error; 637 638 /* allocate a big chunk of DMA'able memory.. */ 639 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->buf_dma, NULL, 640 WPI_RBUF_COUNT * WPI_RBUF_SIZE, WPI_BUF_ALIGN, BUS_DMA_NOWAIT); 641 if (error != 0) { 642 aprint_normal_dev(sc->sc_dev, 643 "could not allocate Rx buffers DMA memory\n"); 644 return error; 645 } 646 647 /* ..and split it into 3KB chunks */ 648 mutex_init(&ring->freelist_mtx, MUTEX_DEFAULT, IPL_NET); 649 SLIST_INIT(&ring->freelist); 650 for (i = 0; i < WPI_RBUF_COUNT; i++) { 651 struct wpi_rbuf *rbuf = &ring->rbuf[i]; 652 653 rbuf->sc = sc; /* backpointer for callbacks */ 654 rbuf->vaddr = (char *)ring->buf_dma.vaddr + i * WPI_RBUF_SIZE; 655 rbuf->paddr = ring->buf_dma.paddr + i * WPI_RBUF_SIZE; 656 657 SLIST_INSERT_HEAD(&ring->freelist, rbuf, next); 658 } 659 660 return 0; 661 } 662 663 static void 664 wpi_free_rpool(struct wpi_softc *sc) 665 { 666 mutex_destroy(&sc->rxq.freelist_mtx); 667 wpi_dma_contig_free(&sc->rxq.buf_dma); 668 } 669 670 static int 671 wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 672 { 673 bus_size_t size; 674 int i, error; 675 676 ring->cur = 0; 677 678 size = WPI_RX_RING_COUNT * sizeof (struct wpi_rx_desc); 679 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma, 680 (void **)&ring->desc, size, 681 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 682 if (error != 0) { 683 aprint_error_dev(sc->sc_dev, 684 "could not allocate rx ring DMA memory\n"); 685 goto fail; 686 } 687 688 /* 689 * Setup Rx buffers. 690 */ 691 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 692 struct wpi_rx_data *data = &ring->data[i]; 693 struct wpi_rbuf *rbuf; 694 695 error = bus_dmamap_create(sc->sc_dmat, WPI_RBUF_SIZE, 1, 696 WPI_RBUF_SIZE, 0, BUS_DMA_NOWAIT, &data->map); 697 if (error) { 698 aprint_error_dev(sc->sc_dev, 699 "could not allocate rx dma map\n"); 700 goto fail; 701 } 702 703 MGETHDR(data->m, M_DONTWAIT, MT_DATA); 704 if (data->m == NULL) { 705 aprint_error_dev(sc->sc_dev, 706 "could not allocate rx mbuf\n"); 707 error = ENOMEM; 708 goto fail; 709 } 710 if ((rbuf = wpi_alloc_rbuf(sc)) == NULL) { 711 m_freem(data->m); 712 data->m = NULL; 713 aprint_error_dev(sc->sc_dev, 714 "could not allocate rx cluster\n"); 715 error = ENOMEM; 716 goto fail; 717 } 718 /* attach Rx buffer to mbuf */ 719 MEXTADD(data->m, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf, 720 rbuf); 721 data->m->m_flags |= M_EXT_RW; 722 723 error = bus_dmamap_load(sc->sc_dmat, data->map, 724 mtod(data->m, void *), WPI_RBUF_SIZE, NULL, 725 BUS_DMA_NOWAIT | BUS_DMA_READ); 726 if (error) { 727 aprint_error_dev(sc->sc_dev, 728 "could not load mbuf: %d\n", error); 729 goto fail; 730 } 731 732 ring->desc[i] = htole32(rbuf->paddr); 733 } 734 735 bus_dmamap_sync(sc->sc_dmat, ring->desc_dma.map, 0, size, 736 BUS_DMASYNC_PREWRITE); 737 738 return 0; 739 740 fail: wpi_free_rx_ring(sc, ring); 741 return error; 742 } 743 744 static void 745 wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 746 { 747 int ntries; 748 749 wpi_mem_lock(sc); 750 751 WPI_WRITE(sc, WPI_RX_CONFIG, 0); 752 for (ntries = 0; ntries < 100; ntries++) { 753 if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE) 754 break; 755 DELAY(10); 756 } 757 #ifdef WPI_DEBUG 758 if (ntries == 100 && wpi_debug > 0) 759 aprint_error_dev(sc->sc_dev, "timeout resetting Rx ring\n"); 760 #endif 761 wpi_mem_unlock(sc); 762 763 ring->cur = 0; 764 } 765 766 static void 767 wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 768 { 769 int i; 770 771 wpi_dma_contig_free(&ring->desc_dma); 772 773 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 774 if (ring->data[i].m != NULL) { 775 bus_dmamap_unload(sc->sc_dmat, ring->data[i].map); 776 m_freem(ring->data[i].m); 777 } 778 if (ring->data[i].map != NULL) { 779 bus_dmamap_destroy(sc->sc_dmat, ring->data[i].map); 780 } 781 } 782 } 783 784 static int 785 wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int count, 786 int qid) 787 { 788 int i, error; 789 790 ring->qid = qid; 791 ring->count = count; 792 ring->queued = 0; 793 ring->cur = 0; 794 795 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma, 796 (void **)&ring->desc, count * sizeof (struct wpi_tx_desc), 797 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 798 if (error != 0) { 799 aprint_error_dev(sc->sc_dev, 800 "could not allocate tx ring DMA memory\n"); 801 goto fail; 802 } 803 804 /* update shared page with ring's base address */ 805 sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr); 806 bus_dmamap_sync(sc->sc_dmat, sc->shared_dma.map, 0, 807 sizeof(struct wpi_shared), BUS_DMASYNC_PREWRITE); 808 809 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->cmd_dma, 810 (void **)&ring->cmd, count * sizeof (struct wpi_tx_cmd), 4, 811 BUS_DMA_NOWAIT); 812 if (error != 0) { 813 aprint_error_dev(sc->sc_dev, 814 "could not allocate tx cmd DMA memory\n"); 815 goto fail; 816 } 817 818 ring->data = malloc(count * sizeof (struct wpi_tx_data), M_DEVBUF, 819 M_WAITOK | M_ZERO); 820 821 for (i = 0; i < count; i++) { 822 struct wpi_tx_data *data = &ring->data[i]; 823 824 error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 825 WPI_MAX_SCATTER - 1, MCLBYTES, 0, BUS_DMA_NOWAIT, 826 &data->map); 827 if (error != 0) { 828 aprint_error_dev(sc->sc_dev, 829 "could not create tx buf DMA map\n"); 830 goto fail; 831 } 832 } 833 834 return 0; 835 836 fail: wpi_free_tx_ring(sc, ring); 837 return error; 838 } 839 840 static void 841 wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 842 { 843 int i, ntries; 844 845 wpi_mem_lock(sc); 846 847 WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0); 848 for (ntries = 0; ntries < 100; ntries++) { 849 if (WPI_READ(sc, WPI_TX_STATUS) & WPI_TX_IDLE(ring->qid)) 850 break; 851 DELAY(10); 852 } 853 #ifdef WPI_DEBUG 854 if (ntries == 100 && wpi_debug > 0) { 855 aprint_error_dev(sc->sc_dev, "timeout resetting Tx ring %d\n", 856 ring->qid); 857 } 858 #endif 859 wpi_mem_unlock(sc); 860 861 for (i = 0; i < ring->count; i++) { 862 struct wpi_tx_data *data = &ring->data[i]; 863 864 if (data->m != NULL) { 865 bus_dmamap_unload(sc->sc_dmat, data->map); 866 m_freem(data->m); 867 data->m = NULL; 868 } 869 } 870 871 ring->queued = 0; 872 ring->cur = 0; 873 } 874 875 static void 876 wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 877 { 878 int i; 879 880 wpi_dma_contig_free(&ring->desc_dma); 881 wpi_dma_contig_free(&ring->cmd_dma); 882 883 if (ring->data != NULL) { 884 for (i = 0; i < ring->count; i++) { 885 struct wpi_tx_data *data = &ring->data[i]; 886 887 if (data->m != NULL) { 888 bus_dmamap_unload(sc->sc_dmat, data->map); 889 m_freem(data->m); 890 } 891 } 892 free(ring->data, M_DEVBUF); 893 } 894 } 895 896 /*ARGUSED*/ 897 static struct ieee80211_node * 898 wpi_node_alloc(struct ieee80211_node_table *nt __unused) 899 { 900 struct wpi_node *wn; 901 902 wn = malloc(sizeof (struct wpi_node), M_80211_NODE, M_NOWAIT | M_ZERO); 903 904 return (struct ieee80211_node *)wn; 905 } 906 907 static void 908 wpi_newassoc(struct ieee80211_node *ni, int isnew) 909 { 910 struct wpi_softc *sc = ni->ni_ic->ic_ifp->if_softc; 911 int i; 912 913 ieee80211_amrr_node_init(&sc->amrr, &((struct wpi_node *)ni)->amn); 914 915 /* set rate to some reasonable initial value */ 916 for (i = ni->ni_rates.rs_nrates - 1; 917 i > 0 && (ni->ni_rates.rs_rates[i] & IEEE80211_RATE_VAL) > 72; 918 i--); 919 ni->ni_txrate = i; 920 } 921 922 static int 923 wpi_media_change(struct ifnet *ifp) 924 { 925 int error; 926 927 error = ieee80211_media_change(ifp); 928 if (error != ENETRESET) 929 return error; 930 931 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING)) 932 wpi_init(ifp); 933 934 return 0; 935 } 936 937 static int 938 wpi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 939 { 940 struct ifnet *ifp = ic->ic_ifp; 941 struct wpi_softc *sc = ifp->if_softc; 942 struct ieee80211_node *ni; 943 enum ieee80211_state ostate = ic->ic_state; 944 int error; 945 946 callout_stop(&sc->calib_to); 947 948 switch (nstate) { 949 case IEEE80211_S_SCAN: 950 951 if (sc->is_scanning) 952 break; 953 954 sc->is_scanning = true; 955 956 if (ostate != IEEE80211_S_SCAN) { 957 /* make the link LED blink while we're scanning */ 958 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 959 } 960 961 if ((error = wpi_scan(sc)) != 0) { 962 aprint_error_dev(sc->sc_dev, 963 "could not initiate scan\n"); 964 return error; 965 } 966 break; 967 968 case IEEE80211_S_ASSOC: 969 if (ic->ic_state != IEEE80211_S_RUN) 970 break; 971 /* FALLTHROUGH */ 972 case IEEE80211_S_AUTH: 973 /* reset state to handle reassociations correctly */ 974 sc->config.associd = 0; 975 sc->config.filter &= ~htole32(WPI_FILTER_BSS); 976 977 if ((error = wpi_auth(sc)) != 0) { 978 aprint_error_dev(sc->sc_dev, 979 "could not send authentication request\n"); 980 return error; 981 } 982 break; 983 984 case IEEE80211_S_RUN: 985 if (ic->ic_opmode == IEEE80211_M_MONITOR) { 986 /* link LED blinks while monitoring */ 987 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 988 break; 989 } 990 ni = ic->ic_bss; 991 992 if (ic->ic_opmode != IEEE80211_M_STA) { 993 (void) wpi_auth(sc); /* XXX */ 994 wpi_setup_beacon(sc, ni); 995 } 996 997 wpi_enable_tsf(sc, ni); 998 999 /* update adapter's configuration */ 1000 sc->config.associd = htole16(ni->ni_associd & ~0xc000); 1001 /* short preamble/slot time are negotiated when associating */ 1002 sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE | 1003 WPI_CONFIG_SHSLOT); 1004 if (ic->ic_flags & IEEE80211_F_SHSLOT) 1005 sc->config.flags |= htole32(WPI_CONFIG_SHSLOT); 1006 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 1007 sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE); 1008 sc->config.filter |= htole32(WPI_FILTER_BSS); 1009 if (ic->ic_opmode != IEEE80211_M_STA) 1010 sc->config.filter |= htole32(WPI_FILTER_BEACON); 1011 1012 /* XXX put somewhere HC_QOS_SUPPORT_ASSOC + HC_IBSS_START */ 1013 1014 DPRINTF(("config chan %d flags %x\n", sc->config.chan, 1015 sc->config.flags)); 1016 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 1017 sizeof (struct wpi_config), 1); 1018 if (error != 0) { 1019 aprint_error_dev(sc->sc_dev, 1020 "could not update configuration\n"); 1021 return error; 1022 } 1023 1024 /* configuration has changed, set Tx power accordingly */ 1025 if ((error = wpi_set_txpower(sc, ic->ic_curchan, 1)) != 0) { 1026 aprint_error_dev(sc->sc_dev, 1027 "could not set Tx power\n"); 1028 return error; 1029 } 1030 1031 if (ic->ic_opmode == IEEE80211_M_STA) { 1032 /* fake a join to init the tx rate */ 1033 wpi_newassoc(ni, 1); 1034 } 1035 1036 /* start periodic calibration timer */ 1037 sc->calib_cnt = 0; 1038 callout_schedule(&sc->calib_to, hz/2); 1039 1040 /* link LED always on while associated */ 1041 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 1042 break; 1043 1044 case IEEE80211_S_INIT: 1045 sc->is_scanning = false; 1046 break; 1047 } 1048 1049 return sc->sc_newstate(ic, nstate, arg); 1050 } 1051 1052 /* 1053 * Grab exclusive access to NIC memory. 1054 */ 1055 static void 1056 wpi_mem_lock(struct wpi_softc *sc) 1057 { 1058 uint32_t tmp; 1059 int ntries; 1060 1061 tmp = WPI_READ(sc, WPI_GPIO_CTL); 1062 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC); 1063 1064 /* spin until we actually get the lock */ 1065 for (ntries = 0; ntries < 1000; ntries++) { 1066 if ((WPI_READ(sc, WPI_GPIO_CTL) & 1067 (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK) 1068 break; 1069 DELAY(10); 1070 } 1071 if (ntries == 1000) 1072 aprint_error_dev(sc->sc_dev, "could not lock memory\n"); 1073 } 1074 1075 /* 1076 * Release lock on NIC memory. 1077 */ 1078 static void 1079 wpi_mem_unlock(struct wpi_softc *sc) 1080 { 1081 uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL); 1082 WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC); 1083 } 1084 1085 static uint32_t 1086 wpi_mem_read(struct wpi_softc *sc, uint16_t addr) 1087 { 1088 WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr); 1089 return WPI_READ(sc, WPI_READ_MEM_DATA); 1090 } 1091 1092 static void 1093 wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data) 1094 { 1095 WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr); 1096 WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data); 1097 } 1098 1099 static void 1100 wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr, 1101 const uint32_t *data, int wlen) 1102 { 1103 for (; wlen > 0; wlen--, data++, addr += 4) 1104 wpi_mem_write(sc, addr, *data); 1105 } 1106 1107 /* 1108 * Read `len' bytes from the EEPROM. We access the EEPROM through the MAC 1109 * instead of using the traditional bit-bang method. 1110 */ 1111 static int 1112 wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len) 1113 { 1114 uint8_t *out = data; 1115 uint32_t val; 1116 int ntries; 1117 1118 wpi_mem_lock(sc); 1119 for (; len > 0; len -= 2, addr++) { 1120 WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2); 1121 1122 for (ntries = 0; ntries < 10; ntries++) { 1123 if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) & 1124 WPI_EEPROM_READY) 1125 break; 1126 DELAY(5); 1127 } 1128 if (ntries == 10) { 1129 aprint_error_dev(sc->sc_dev, "could not read EEPROM\n"); 1130 return ETIMEDOUT; 1131 } 1132 *out++ = val >> 16; 1133 if (len > 1) 1134 *out++ = val >> 24; 1135 } 1136 wpi_mem_unlock(sc); 1137 1138 return 0; 1139 } 1140 1141 /* 1142 * The firmware boot code is small and is intended to be copied directly into 1143 * the NIC internal memory. 1144 */ 1145 int 1146 wpi_load_microcode(struct wpi_softc *sc, const uint8_t *ucode, int size) 1147 { 1148 int ntries; 1149 1150 size /= sizeof (uint32_t); 1151 1152 wpi_mem_lock(sc); 1153 1154 /* copy microcode image into NIC memory */ 1155 wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE, 1156 (const uint32_t *)ucode, size); 1157 1158 wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0); 1159 wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT); 1160 wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size); 1161 1162 /* run microcode */ 1163 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN); 1164 1165 /* wait for transfer to complete */ 1166 for (ntries = 0; ntries < 1000; ntries++) { 1167 if (!(wpi_mem_read(sc, WPI_MEM_UCODE_CTL) & WPI_UC_RUN)) 1168 break; 1169 DELAY(10); 1170 } 1171 if (ntries == 1000) { 1172 wpi_mem_unlock(sc); 1173 aprint_error_dev(sc->sc_dev, "could not load boot firmware\n"); 1174 return ETIMEDOUT; 1175 } 1176 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE); 1177 1178 wpi_mem_unlock(sc); 1179 1180 return 0; 1181 } 1182 1183 static int 1184 wpi_cache_firmware(struct wpi_softc *sc) 1185 { 1186 const char *const fwname = wpi_firmware_name; 1187 firmware_handle_t fw; 1188 int error; 1189 1190 /* sc is used here only to report error messages. */ 1191 1192 mutex_enter(&wpi_firmware_mutex); 1193 1194 if (wpi_firmware_users == SIZE_MAX) { 1195 mutex_exit(&wpi_firmware_mutex); 1196 return ENFILE; /* Too many of something in the system... */ 1197 } 1198 if (wpi_firmware_users++) { 1199 KASSERT(wpi_firmware_image != NULL); 1200 KASSERT(wpi_firmware_size > 0); 1201 mutex_exit(&wpi_firmware_mutex); 1202 return 0; /* Already good to go. */ 1203 } 1204 1205 KASSERT(wpi_firmware_image == NULL); 1206 KASSERT(wpi_firmware_size == 0); 1207 1208 /* load firmware image from disk */ 1209 if ((error = firmware_open("if_wpi", fwname, &fw)) != 0) { 1210 aprint_error_dev(sc->sc_dev, 1211 "could not open firmware file %s: %d\n", fwname, error); 1212 goto fail0; 1213 } 1214 1215 wpi_firmware_size = firmware_get_size(fw); 1216 1217 if (wpi_firmware_size > sizeof (struct wpi_firmware_hdr) + 1218 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ + 1219 WPI_FW_INIT_TEXT_MAXSZ + WPI_FW_INIT_DATA_MAXSZ + 1220 WPI_FW_BOOT_TEXT_MAXSZ) { 1221 aprint_error_dev(sc->sc_dev, 1222 "firmware file %s too large: %zu bytes\n", 1223 fwname, wpi_firmware_size); 1224 error = EFBIG; 1225 goto fail1; 1226 } 1227 1228 if (wpi_firmware_size < sizeof (struct wpi_firmware_hdr)) { 1229 aprint_error_dev(sc->sc_dev, 1230 "firmware file %s too small: %zu bytes\n", 1231 fwname, wpi_firmware_size); 1232 error = EINVAL; 1233 goto fail1; 1234 } 1235 1236 wpi_firmware_image = firmware_malloc(wpi_firmware_size); 1237 if (wpi_firmware_image == NULL) { 1238 aprint_error_dev(sc->sc_dev, 1239 "not enough memory for firmware file %s\n", fwname); 1240 error = ENOMEM; 1241 goto fail1; 1242 } 1243 1244 error = firmware_read(fw, 0, wpi_firmware_image, wpi_firmware_size); 1245 if (error != 0) { 1246 aprint_error_dev(sc->sc_dev, 1247 "error reading firmware file %s: %d\n", fwname, error); 1248 goto fail2; 1249 } 1250 1251 /* Success! */ 1252 firmware_close(fw); 1253 mutex_exit(&wpi_firmware_mutex); 1254 return 0; 1255 1256 fail2: 1257 firmware_free(wpi_firmware_image, wpi_firmware_size); 1258 wpi_firmware_image = NULL; 1259 fail1: 1260 wpi_firmware_size = 0; 1261 firmware_close(fw); 1262 fail0: 1263 KASSERT(wpi_firmware_users == 1); 1264 wpi_firmware_users = 0; 1265 KASSERT(wpi_firmware_image == NULL); 1266 KASSERT(wpi_firmware_size == 0); 1267 1268 mutex_exit(&wpi_firmware_mutex); 1269 return error; 1270 } 1271 1272 static void 1273 wpi_release_firmware(void) 1274 { 1275 1276 mutex_enter(&wpi_firmware_mutex); 1277 1278 KASSERT(wpi_firmware_users > 0); 1279 KASSERT(wpi_firmware_image != NULL); 1280 KASSERT(wpi_firmware_size != 0); 1281 1282 if (--wpi_firmware_users == 0) { 1283 firmware_free(wpi_firmware_image, wpi_firmware_size); 1284 wpi_firmware_image = NULL; 1285 wpi_firmware_size = 0; 1286 } 1287 1288 mutex_exit(&wpi_firmware_mutex); 1289 } 1290 1291 static int 1292 wpi_load_firmware(struct wpi_softc *sc) 1293 { 1294 struct wpi_dma_info *dma = &sc->fw_dma; 1295 struct wpi_firmware_hdr hdr; 1296 const uint8_t *init_text, *init_data, *main_text, *main_data; 1297 const uint8_t *boot_text; 1298 uint32_t init_textsz, init_datasz, main_textsz, main_datasz; 1299 uint32_t boot_textsz; 1300 size_t size; 1301 int error; 1302 1303 if (!sc->fw_used) { 1304 if ((error = wpi_cache_firmware(sc)) != 0) 1305 return error; 1306 sc->fw_used = true; 1307 } 1308 1309 KASSERT(sc->fw_used); 1310 KASSERT(wpi_firmware_image != NULL); 1311 KASSERT(wpi_firmware_size > sizeof(hdr)); 1312 1313 memcpy(&hdr, wpi_firmware_image, sizeof(hdr)); 1314 1315 main_textsz = le32toh(hdr.main_textsz); 1316 main_datasz = le32toh(hdr.main_datasz); 1317 init_textsz = le32toh(hdr.init_textsz); 1318 init_datasz = le32toh(hdr.init_datasz); 1319 boot_textsz = le32toh(hdr.boot_textsz); 1320 1321 /* sanity-check firmware segments sizes */ 1322 if (main_textsz > WPI_FW_MAIN_TEXT_MAXSZ || 1323 main_datasz > WPI_FW_MAIN_DATA_MAXSZ || 1324 init_textsz > WPI_FW_INIT_TEXT_MAXSZ || 1325 init_datasz > WPI_FW_INIT_DATA_MAXSZ || 1326 boot_textsz > WPI_FW_BOOT_TEXT_MAXSZ || 1327 (boot_textsz & 3) != 0) { 1328 aprint_error_dev(sc->sc_dev, "invalid firmware header\n"); 1329 error = EINVAL; 1330 goto free_firmware; 1331 } 1332 1333 /* check that all firmware segments are present */ 1334 size = sizeof (struct wpi_firmware_hdr) + main_textsz + 1335 main_datasz + init_textsz + init_datasz + boot_textsz; 1336 if (wpi_firmware_size < size) { 1337 aprint_error_dev(sc->sc_dev, 1338 "firmware file truncated: %zu bytes, expected %zu bytes\n", 1339 wpi_firmware_size, size); 1340 error = EINVAL; 1341 goto free_firmware; 1342 } 1343 1344 /* get pointers to firmware segments */ 1345 main_text = wpi_firmware_image + sizeof (struct wpi_firmware_hdr); 1346 main_data = main_text + main_textsz; 1347 init_text = main_data + main_datasz; 1348 init_data = init_text + init_textsz; 1349 boot_text = init_data + init_datasz; 1350 1351 /* copy initialization images into pre-allocated DMA-safe memory */ 1352 memcpy(dma->vaddr, init_data, init_datasz); 1353 memcpy((char *)dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, init_text, 1354 init_textsz); 1355 1356 bus_dmamap_sync(dma->tag, dma->map, 0, dma->size, BUS_DMASYNC_PREWRITE); 1357 1358 /* tell adapter where to find initialization images */ 1359 wpi_mem_lock(sc); 1360 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 1361 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, init_datasz); 1362 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 1363 dma->paddr + WPI_FW_INIT_DATA_MAXSZ); 1364 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, init_textsz); 1365 wpi_mem_unlock(sc); 1366 1367 /* load firmware boot code */ 1368 if ((error = wpi_load_microcode(sc, boot_text, boot_textsz)) != 0) { 1369 aprint_error_dev(sc->sc_dev, "could not load boot firmware\n"); 1370 return error; 1371 } 1372 1373 /* now press "execute" ;-) */ 1374 WPI_WRITE(sc, WPI_RESET, 0); 1375 1376 /* wait at most one second for first alive notification */ 1377 if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) { 1378 /* this isn't what was supposed to happen.. */ 1379 aprint_error_dev(sc->sc_dev, 1380 "timeout waiting for adapter to initialize\n"); 1381 } 1382 1383 /* copy runtime images into pre-allocated DMA-safe memory */ 1384 memcpy(dma->vaddr, main_data, main_datasz); 1385 memcpy((char *)dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, main_text, 1386 main_textsz); 1387 1388 bus_dmamap_sync(dma->tag, dma->map, 0, dma->size, BUS_DMASYNC_PREWRITE); 1389 1390 /* tell adapter where to find runtime images */ 1391 wpi_mem_lock(sc); 1392 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 1393 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, main_datasz); 1394 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 1395 dma->paddr + WPI_FW_MAIN_DATA_MAXSZ); 1396 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | main_textsz); 1397 wpi_mem_unlock(sc); 1398 1399 /* wait at most one second for second alive notification */ 1400 if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) { 1401 /* this isn't what was supposed to happen.. */ 1402 aprint_error_dev(sc->sc_dev, 1403 "timeout waiting for adapter to initialize\n"); 1404 } 1405 1406 return error; 1407 1408 free_firmware: 1409 sc->fw_used = false; 1410 wpi_release_firmware(); 1411 return error; 1412 } 1413 1414 static void 1415 wpi_calib_timeout(void *arg) 1416 { 1417 struct wpi_softc *sc = arg; 1418 struct ieee80211com *ic = &sc->sc_ic; 1419 int temp, s; 1420 1421 /* automatic rate control triggered every 500ms */ 1422 if (ic->ic_fixed_rate == -1) { 1423 s = splnet(); 1424 if (ic->ic_opmode == IEEE80211_M_STA) 1425 wpi_iter_func(sc, ic->ic_bss); 1426 else 1427 ieee80211_iterate_nodes(&ic->ic_sta, wpi_iter_func, sc); 1428 splx(s); 1429 } 1430 1431 /* update sensor data */ 1432 temp = (int)WPI_READ(sc, WPI_TEMPERATURE); 1433 1434 /* automatic power calibration every 60s */ 1435 if (++sc->calib_cnt >= 120) { 1436 wpi_power_calibration(sc, temp); 1437 sc->calib_cnt = 0; 1438 } 1439 1440 callout_schedule(&sc->calib_to, hz/2); 1441 } 1442 1443 static void 1444 wpi_iter_func(void *arg, struct ieee80211_node *ni) 1445 { 1446 struct wpi_softc *sc = arg; 1447 struct wpi_node *wn = (struct wpi_node *)ni; 1448 1449 ieee80211_amrr_choose(&sc->amrr, ni, &wn->amn); 1450 } 1451 1452 /* 1453 * This function is called periodically (every 60 seconds) to adjust output 1454 * power to temperature changes. 1455 */ 1456 void 1457 wpi_power_calibration(struct wpi_softc *sc, int temp) 1458 { 1459 /* sanity-check read value */ 1460 if (temp < -260 || temp > 25) { 1461 /* this can't be correct, ignore */ 1462 DPRINTF(("out-of-range temperature reported: %d\n", temp)); 1463 return; 1464 } 1465 1466 DPRINTF(("temperature %d->%d\n", sc->temp, temp)); 1467 1468 /* adjust Tx power if need be */ 1469 if (abs(temp - sc->temp) <= 6) 1470 return; 1471 1472 sc->temp = temp; 1473 1474 if (wpi_set_txpower(sc, sc->sc_ic.ic_curchan, 1) != 0) { 1475 /* just warn, too bad for the automatic calibration... */ 1476 aprint_error_dev(sc->sc_dev, "could not adjust Tx power\n"); 1477 } 1478 } 1479 1480 static void 1481 wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, 1482 struct wpi_rx_data *data) 1483 { 1484 struct ieee80211com *ic = &sc->sc_ic; 1485 struct ifnet *ifp = ic->ic_ifp; 1486 struct wpi_rx_ring *ring = &sc->rxq; 1487 struct wpi_rx_stat *stat; 1488 struct wpi_rx_head *head; 1489 struct wpi_rx_tail *tail; 1490 struct wpi_rbuf *rbuf; 1491 struct ieee80211_frame *wh; 1492 struct ieee80211_node *ni; 1493 struct mbuf *m, *mnew; 1494 int data_off, error, s; 1495 1496 bus_dmamap_sync(sc->sc_dmat, data->map, 0, data->map->dm_mapsize, 1497 BUS_DMASYNC_POSTREAD); 1498 stat = (struct wpi_rx_stat *)(desc + 1); 1499 1500 if (stat->len > WPI_STAT_MAXLEN) { 1501 aprint_error_dev(sc->sc_dev, "invalid rx statistic header\n"); 1502 if_statinc(ifp, if_ierrors); 1503 return; 1504 } 1505 1506 head = (struct wpi_rx_head *)((char *)(stat + 1) + stat->len); 1507 tail = (struct wpi_rx_tail *)((char *)(head + 1) + le16toh(head->len)); 1508 1509 DPRINTFN(4, ("rx intr: idx=%d len=%d stat len=%d rssi=%d rate=%x " 1510 "chan=%d tstamp=%" PRIu64 "\n", ring->cur, le32toh(desc->len), 1511 le16toh(head->len), (int8_t)stat->rssi, head->rate, head->chan, 1512 le64toh(tail->tstamp))); 1513 1514 /* 1515 * Discard Rx frames with bad CRC early (XXX we may want to pass them 1516 * to radiotap in monitor mode). 1517 */ 1518 if ((le32toh(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) { 1519 DPRINTF(("rx tail flags error %x\n", 1520 le32toh(tail->flags))); 1521 if_statinc(ifp, if_ierrors); 1522 return; 1523 } 1524 1525 /* Compute where are the useful datas */ 1526 data_off = (char*)(head + 1) - mtod(data->m, char*); 1527 1528 MGETHDR(mnew, M_DONTWAIT, MT_DATA); 1529 if (mnew == NULL) { 1530 if_statinc(ifp, if_ierrors); 1531 return; 1532 } 1533 1534 rbuf = wpi_alloc_rbuf(sc); 1535 if (rbuf == NULL) { 1536 m_freem(mnew); 1537 if_statinc(ifp, if_ierrors); 1538 return; 1539 } 1540 1541 /* attach Rx buffer to mbuf */ 1542 MEXTADD(mnew, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf, 1543 rbuf); 1544 mnew->m_flags |= M_EXT_RW; 1545 1546 bus_dmamap_unload(sc->sc_dmat, data->map); 1547 1548 error = bus_dmamap_load(sc->sc_dmat, data->map, 1549 mtod(mnew, void *), WPI_RBUF_SIZE, NULL, 1550 BUS_DMA_NOWAIT | BUS_DMA_READ); 1551 if (error) { 1552 device_printf(sc->sc_dev, 1553 "couldn't load rx mbuf: %d\n", error); 1554 m_freem(mnew); 1555 if_statinc(ifp, if_ierrors); 1556 1557 error = bus_dmamap_load(sc->sc_dmat, data->map, 1558 mtod(data->m, void *), WPI_RBUF_SIZE, NULL, 1559 BUS_DMA_NOWAIT | BUS_DMA_READ); 1560 if (error) 1561 panic("%s: bus_dmamap_load failed: %d\n", 1562 device_xname(sc->sc_dev), error); 1563 return; 1564 } 1565 1566 /* new mbuf loaded successfully */ 1567 m = data->m; 1568 data->m = mnew; 1569 1570 /* update Rx descriptor */ 1571 ring->desc[ring->cur] = htole32(rbuf->paddr); 1572 bus_dmamap_sync(sc->sc_dmat, ring->desc_dma.map, 0, 1573 ring->desc_dma.size, 1574 BUS_DMASYNC_PREWRITE); 1575 1576 m->m_data = (char*)m->m_data + data_off; 1577 m->m_pkthdr.len = m->m_len = le16toh(head->len); 1578 1579 /* finalize mbuf */ 1580 m_set_rcvif(m, ifp); 1581 1582 s = splnet(); 1583 1584 if (sc->sc_drvbpf != NULL) { 1585 struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap; 1586 1587 tap->wr_flags = 0; 1588 tap->wr_chan_freq = 1589 htole16(ic->ic_channels[head->chan].ic_freq); 1590 tap->wr_chan_flags = 1591 htole16(ic->ic_channels[head->chan].ic_flags); 1592 tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET); 1593 tap->wr_dbm_antnoise = (int8_t)le16toh(stat->noise); 1594 tap->wr_tsft = tail->tstamp; 1595 tap->wr_antenna = (le16toh(head->flags) >> 4) & 0xf; 1596 switch (head->rate) { 1597 /* CCK rates */ 1598 case 10: tap->wr_rate = 2; break; 1599 case 20: tap->wr_rate = 4; break; 1600 case 55: tap->wr_rate = 11; break; 1601 case 110: tap->wr_rate = 22; break; 1602 /* OFDM rates */ 1603 case 0xd: tap->wr_rate = 12; break; 1604 case 0xf: tap->wr_rate = 18; break; 1605 case 0x5: tap->wr_rate = 24; break; 1606 case 0x7: tap->wr_rate = 36; break; 1607 case 0x9: tap->wr_rate = 48; break; 1608 case 0xb: tap->wr_rate = 72; break; 1609 case 0x1: tap->wr_rate = 96; break; 1610 case 0x3: tap->wr_rate = 108; break; 1611 /* unknown rate: should not happen */ 1612 default: tap->wr_rate = 0; 1613 } 1614 if (le16toh(head->flags) & 0x4) 1615 tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; 1616 1617 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m, BPF_D_IN); 1618 } 1619 1620 /* grab a reference to the source node */ 1621 wh = mtod(m, struct ieee80211_frame *); 1622 ni = ieee80211_find_rxnode(ic, (struct ieee80211_frame_min *)wh); 1623 1624 /* send the frame to the 802.11 layer */ 1625 ieee80211_input(ic, m, ni, stat->rssi, 0); 1626 1627 /* release node reference */ 1628 ieee80211_free_node(ni); 1629 1630 splx(s); 1631 } 1632 1633 static void 1634 wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1635 { 1636 struct ifnet *ifp = sc->sc_ic.ic_ifp; 1637 struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3]; 1638 struct wpi_tx_data *data = &ring->data[desc->idx]; 1639 struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1); 1640 struct wpi_node *wn = (struct wpi_node *)data->ni; 1641 int s; 1642 1643 DPRINTFN(4, ("tx done: qid=%d idx=%d retries=%d nkill=%d rate=%x " 1644 "duration=%d status=%x\n", desc->qid, desc->idx, stat->ntries, 1645 stat->nkill, stat->rate, le32toh(stat->duration), 1646 le32toh(stat->status))); 1647 1648 s = splnet(); 1649 1650 /* 1651 * Update rate control statistics for the node. 1652 * XXX we should not count mgmt frames since they're always sent at 1653 * the lowest available bit-rate. 1654 */ 1655 wn->amn.amn_txcnt++; 1656 if (stat->ntries > 0) { 1657 DPRINTFN(3, ("tx intr ntries %d\n", stat->ntries)); 1658 wn->amn.amn_retrycnt++; 1659 } 1660 1661 if ((le32toh(stat->status) & 0xff) != 1) 1662 if_statinc(ifp, if_oerrors); 1663 else 1664 if_statinc(ifp, if_opackets); 1665 1666 bus_dmamap_unload(sc->sc_dmat, data->map); 1667 m_freem(data->m); 1668 data->m = NULL; 1669 ieee80211_free_node(data->ni); 1670 data->ni = NULL; 1671 1672 ring->queued--; 1673 1674 sc->sc_tx_timer = 0; 1675 ifp->if_flags &= ~IFF_OACTIVE; 1676 wpi_start(ifp); /* in softint */ 1677 1678 splx(s); 1679 } 1680 1681 static void 1682 wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1683 { 1684 struct wpi_tx_ring *ring = &sc->cmdq; 1685 struct wpi_tx_data *data; 1686 1687 if ((desc->qid & 7) != 4) 1688 return; /* not a command ack */ 1689 1690 data = &ring->data[desc->idx]; 1691 1692 /* if the command was mapped in a mbuf, free it */ 1693 if (data->m != NULL) { 1694 bus_dmamap_unload(sc->sc_dmat, data->map); 1695 m_freem(data->m); 1696 data->m = NULL; 1697 } 1698 1699 wakeup(&ring->cmd[desc->idx]); 1700 } 1701 1702 static void 1703 wpi_notif_intr(struct wpi_softc *sc) 1704 { 1705 struct ieee80211com *ic = &sc->sc_ic; 1706 struct ifnet *ifp = ic->ic_ifp; 1707 uint32_t hw; 1708 int s; 1709 1710 bus_dmamap_sync(sc->sc_dmat, sc->shared_dma.map, 0, 1711 sizeof(struct wpi_shared), BUS_DMASYNC_POSTREAD); 1712 1713 hw = le32toh(sc->shared->next); 1714 while (sc->rxq.cur != hw) { 1715 struct wpi_rx_data *data = &sc->rxq.data[sc->rxq.cur]; 1716 struct wpi_rx_desc *desc; 1717 1718 bus_dmamap_sync(sc->sc_dmat, data->map, 0, data->map->dm_mapsize, 1719 BUS_DMASYNC_POSTREAD); 1720 desc = mtod(data->m, struct wpi_rx_desc *); 1721 1722 DPRINTFN(4, ("rx notification qid=%x idx=%d flags=%x type=%d " 1723 "len=%d\n", desc->qid, desc->idx, desc->flags, 1724 desc->type, le32toh(desc->len))); 1725 1726 if (!(desc->qid & 0x80)) /* reply to a command */ 1727 wpi_cmd_intr(sc, desc); 1728 1729 switch (desc->type) { 1730 case WPI_RX_DONE: 1731 /* a 802.11 frame was received */ 1732 wpi_rx_intr(sc, desc, data); 1733 break; 1734 1735 case WPI_TX_DONE: 1736 /* a 802.11 frame has been transmitted */ 1737 wpi_tx_intr(sc, desc); 1738 break; 1739 1740 case WPI_UC_READY: 1741 { 1742 struct wpi_ucode_info *uc = 1743 (struct wpi_ucode_info *)(desc + 1); 1744 1745 /* the microcontroller is ready */ 1746 DPRINTF(("microcode alive notification version %x " 1747 "alive %x\n", le32toh(uc->version), 1748 le32toh(uc->valid))); 1749 1750 if (le32toh(uc->valid) != 1) { 1751 aprint_error_dev(sc->sc_dev, 1752 "microcontroller initialization failed\n"); 1753 } 1754 break; 1755 } 1756 case WPI_STATE_CHANGED: 1757 { 1758 uint32_t *status = (uint32_t *)(desc + 1); 1759 1760 /* enabled/disabled notification */ 1761 DPRINTF(("state changed to %x\n", le32toh(*status))); 1762 1763 if (le32toh(*status) & 1) { 1764 s = splnet(); 1765 /* the radio button has to be pushed */ 1766 /* wake up thread to signal powerd */ 1767 cv_signal(&sc->sc_rsw_cv); 1768 aprint_error_dev(sc->sc_dev, 1769 "Radio transmitter is off\n"); 1770 /* turn the interface down */ 1771 ifp->if_flags &= ~IFF_UP; 1772 wpi_stop(ifp, 1); 1773 splx(s); 1774 return; /* no further processing */ 1775 } 1776 break; 1777 } 1778 case WPI_START_SCAN: 1779 { 1780 #if 0 1781 struct wpi_start_scan *scan = 1782 (struct wpi_start_scan *)(desc + 1); 1783 1784 DPRINTFN(2, ("scanning channel %d status %x\n", 1785 scan->chan, le32toh(scan->status))); 1786 1787 /* fix current channel */ 1788 ic->ic_curchan = &ic->ic_channels[scan->chan]; 1789 #endif 1790 break; 1791 } 1792 case WPI_STOP_SCAN: 1793 { 1794 #ifdef WPI_DEBUG 1795 struct wpi_stop_scan *scan = 1796 (struct wpi_stop_scan *)(desc + 1); 1797 #endif 1798 1799 DPRINTF(("scan finished nchan=%d status=%d chan=%d\n", 1800 scan->nchan, scan->status, scan->chan)); 1801 1802 s = splnet(); 1803 sc->is_scanning = false; 1804 if (ic->ic_state == IEEE80211_S_SCAN) 1805 ieee80211_next_scan(ic); 1806 splx(s); 1807 break; 1808 } 1809 } 1810 1811 sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT; 1812 } 1813 1814 /* tell the firmware what we have processed */ 1815 hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1; 1816 WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7); 1817 } 1818 1819 static int 1820 wpi_intr(void *arg) 1821 { 1822 struct wpi_softc *sc = arg; 1823 uint32_t r; 1824 1825 r = WPI_READ(sc, WPI_INTR); 1826 if (r == 0 || r == 0xffffffff) 1827 return 0; /* not for us */ 1828 1829 DPRINTFN(6, ("interrupt reg %x\n", r)); 1830 1831 /* disable interrupts */ 1832 WPI_WRITE(sc, WPI_MASK, 0); 1833 1834 softint_schedule(sc->sc_soft_ih); 1835 return 1; 1836 } 1837 1838 static void 1839 wpi_softintr(void *arg) 1840 { 1841 struct wpi_softc *sc = arg; 1842 struct ifnet *ifp = sc->sc_ic.ic_ifp; 1843 uint32_t r; 1844 1845 r = WPI_READ(sc, WPI_INTR); 1846 if (r == 0 || r == 0xffffffff) 1847 goto out; 1848 1849 /* ack interrupts */ 1850 WPI_WRITE(sc, WPI_INTR, r); 1851 1852 if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) { 1853 /* SYSTEM FAILURE, SYSTEM FAILURE */ 1854 aprint_error_dev(sc->sc_dev, "fatal firmware error\n"); 1855 ifp->if_flags &= ~IFF_UP; 1856 wpi_stop(ifp, 1); 1857 return; 1858 } 1859 1860 if (r & WPI_RX_INTR) 1861 wpi_notif_intr(sc); 1862 1863 if (r & WPI_ALIVE_INTR) /* firmware initialized */ 1864 wakeup(sc); 1865 1866 out: 1867 /* re-enable interrupts */ 1868 if (ifp->if_flags & IFF_UP) 1869 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 1870 } 1871 1872 static uint8_t 1873 wpi_plcp_signal(int rate) 1874 { 1875 switch (rate) { 1876 /* CCK rates (returned values are device-dependent) */ 1877 case 2: return 10; 1878 case 4: return 20; 1879 case 11: return 55; 1880 case 22: return 110; 1881 1882 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1883 /* R1-R4, (u)ral is R4-R1 */ 1884 case 12: return 0xd; 1885 case 18: return 0xf; 1886 case 24: return 0x5; 1887 case 36: return 0x7; 1888 case 48: return 0x9; 1889 case 72: return 0xb; 1890 case 96: return 0x1; 1891 case 108: return 0x3; 1892 1893 /* unsupported rates (should not get there) */ 1894 default: return 0; 1895 } 1896 } 1897 1898 /* quickly determine if a given rate is CCK or OFDM */ 1899 #define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1900 1901 static int 1902 wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, 1903 int ac) 1904 { 1905 struct ieee80211com *ic = &sc->sc_ic; 1906 struct wpi_tx_ring *ring = &sc->txq[ac]; 1907 struct wpi_tx_desc *desc; 1908 struct wpi_tx_data *data; 1909 struct wpi_tx_cmd *cmd; 1910 struct wpi_cmd_data *tx; 1911 struct ieee80211_frame *wh; 1912 struct ieee80211_key *k; 1913 const struct chanAccParams *cap; 1914 struct mbuf *mnew; 1915 int i, rate, error, hdrlen, noack = 0; 1916 1917 desc = &ring->desc[ring->cur]; 1918 data = &ring->data[ring->cur]; 1919 1920 wh = mtod(m0, struct ieee80211_frame *); 1921 1922 if (ieee80211_has_qos(wh)) { 1923 cap = &ic->ic_wme.wme_chanParams; 1924 noack = cap->cap_wmeParams[ac].wmep_noackPolicy; 1925 } 1926 1927 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1928 k = ieee80211_crypto_encap(ic, ni, m0); 1929 if (k == NULL) { 1930 m_freem(m0); 1931 return ENOBUFS; 1932 } 1933 1934 /* packet header may have moved, reset our local pointer */ 1935 wh = mtod(m0, struct ieee80211_frame *); 1936 } 1937 1938 hdrlen = ieee80211_anyhdrsize(wh); 1939 1940 /* pickup a rate */ 1941 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1942 IEEE80211_FC0_TYPE_MGT) { 1943 /* mgmt frames are sent at the lowest available bit-rate */ 1944 rate = ni->ni_rates.rs_rates[0]; 1945 } else { 1946 if (ic->ic_fixed_rate != -1) { 1947 rate = ic->ic_sup_rates[ic->ic_curmode]. 1948 rs_rates[ic->ic_fixed_rate]; 1949 } else 1950 rate = ni->ni_rates.rs_rates[ni->ni_txrate]; 1951 } 1952 rate &= IEEE80211_RATE_VAL; 1953 1954 if (sc->sc_drvbpf != NULL) { 1955 struct wpi_tx_radiotap_header *tap = &sc->sc_txtap; 1956 1957 tap->wt_flags = 0; 1958 tap->wt_chan_freq = htole16(ni->ni_chan->ic_freq); 1959 tap->wt_chan_flags = htole16(ni->ni_chan->ic_flags); 1960 tap->wt_rate = rate; 1961 tap->wt_hwqueue = ac; 1962 if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1963 tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1964 1965 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0, BPF_D_OUT); 1966 } 1967 1968 cmd = &ring->cmd[ring->cur]; 1969 cmd->code = WPI_CMD_TX_DATA; 1970 cmd->flags = 0; 1971 cmd->qid = ring->qid; 1972 cmd->idx = ring->cur; 1973 1974 tx = (struct wpi_cmd_data *)cmd->data; 1975 /* no need to zero tx, all fields are reinitialized here */ 1976 tx->flags = 0; 1977 1978 if (!noack && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1979 tx->flags |= htole32(WPI_TX_NEED_ACK); 1980 } else if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > ic->ic_rtsthreshold) 1981 tx->flags |= htole32(WPI_TX_NEED_RTS | WPI_TX_FULL_TXOP); 1982 1983 tx->flags |= htole32(WPI_TX_AUTO_SEQ); 1984 1985 /* retrieve destination node's id */ 1986 tx->id = IEEE80211_IS_MULTICAST(wh->i_addr1) ? WPI_ID_BROADCAST : 1987 WPI_ID_BSS; 1988 1989 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1990 IEEE80211_FC0_TYPE_MGT) { 1991 /* tell h/w to set timestamp in probe responses */ 1992 if ((wh->i_fc[0] & 1993 (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) == 1994 (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP)) 1995 tx->flags |= htole32(WPI_TX_INSERT_TSTAMP); 1996 1997 if (((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1998 IEEE80211_FC0_SUBTYPE_ASSOC_REQ) || 1999 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 2000 IEEE80211_FC0_SUBTYPE_REASSOC_REQ)) 2001 tx->timeout = htole16(3); 2002 else 2003 tx->timeout = htole16(2); 2004 } else 2005 tx->timeout = htole16(0); 2006 2007 tx->rate = wpi_plcp_signal(rate); 2008 2009 /* be very persistant at sending frames out */ 2010 tx->rts_ntries = 7; 2011 tx->data_ntries = 15; 2012 2013 tx->ofdm_mask = 0xff; 2014 tx->cck_mask = 0x0f; 2015 tx->lifetime = htole32(WPI_LIFETIME_INFINITE); 2016 2017 tx->len = htole16(m0->m_pkthdr.len); 2018 2019 /* save and trim IEEE802.11 header */ 2020 memcpy((uint8_t *)(tx + 1), wh, hdrlen); 2021 m_adj(m0, hdrlen); 2022 2023 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 2024 BUS_DMA_WRITE | BUS_DMA_NOWAIT); 2025 if (error != 0 && error != EFBIG) { 2026 aprint_error_dev(sc->sc_dev, "could not map mbuf (error %d)\n", 2027 error); 2028 m_freem(m0); 2029 return error; 2030 } 2031 if (error != 0) { 2032 /* too many fragments, linearize */ 2033 2034 MGETHDR(mnew, M_DONTWAIT, MT_DATA); 2035 if (mnew == NULL) { 2036 m_freem(m0); 2037 return ENOMEM; 2038 } 2039 m_copy_pkthdr(mnew, m0); 2040 if (m0->m_pkthdr.len > MHLEN) { 2041 MCLGET(mnew, M_DONTWAIT); 2042 if (!(mnew->m_flags & M_EXT)) { 2043 m_freem(m0); 2044 m_freem(mnew); 2045 return ENOMEM; 2046 } 2047 } 2048 2049 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(mnew, void *)); 2050 m_freem(m0); 2051 mnew->m_len = mnew->m_pkthdr.len; 2052 m0 = mnew; 2053 2054 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 2055 BUS_DMA_WRITE | BUS_DMA_NOWAIT); 2056 if (error != 0) { 2057 aprint_error_dev(sc->sc_dev, 2058 "could not map mbuf (error %d)\n", error); 2059 m_freem(m0); 2060 return error; 2061 } 2062 } 2063 2064 data->m = m0; 2065 data->ni = ni; 2066 2067 DPRINTFN(4, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n", 2068 ring->qid, ring->cur, m0->m_pkthdr.len, data->map->dm_nsegs)); 2069 2070 /* first scatter/gather segment is used by the tx data command */ 2071 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2072 (1 + data->map->dm_nsegs) << 24); 2073 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2074 ring->cur * sizeof (struct wpi_tx_cmd)); 2075 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data) + 2076 ((hdrlen + 3) & ~3)); 2077 for (i = 1; i <= data->map->dm_nsegs; i++) { 2078 desc->segs[i].addr = 2079 htole32(data->map->dm_segs[i - 1].ds_addr); 2080 desc->segs[i].len = 2081 htole32(data->map->dm_segs[i - 1].ds_len); 2082 } 2083 2084 ring->queued++; 2085 2086 bus_dmamap_sync(sc->sc_dmat, data->map, 0, 2087 data->map->dm_mapsize, 2088 BUS_DMASYNC_PREWRITE); 2089 bus_dmamap_sync(sc->sc_dmat, ring->cmd_dma.map, 0, 2090 ring->cmd_dma.size, 2091 BUS_DMASYNC_PREWRITE); 2092 bus_dmamap_sync(sc->sc_dmat, ring->desc_dma.map, 0, 2093 ring->desc_dma.size, 2094 BUS_DMASYNC_PREWRITE); 2095 2096 /* kick ring */ 2097 ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT; 2098 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2099 2100 return 0; 2101 } 2102 2103 static void 2104 wpi_start(struct ifnet *ifp) 2105 { 2106 struct wpi_softc *sc = ifp->if_softc; 2107 struct ieee80211com *ic = &sc->sc_ic; 2108 struct ieee80211_node *ni; 2109 struct ether_header *eh; 2110 struct mbuf *m0; 2111 int ac; 2112 2113 /* 2114 * net80211 may still try to send management frames even if the 2115 * IFF_RUNNING flag is not set... 2116 */ 2117 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 2118 return; 2119 2120 for (;;) { 2121 IF_DEQUEUE(&ic->ic_mgtq, m0); 2122 if (m0 != NULL) { 2123 2124 ni = M_GETCTX(m0, struct ieee80211_node *); 2125 M_CLEARCTX(m0); 2126 2127 /* management frames go into ring 0 */ 2128 if (sc->txq[0].queued > sc->txq[0].count - 8) { 2129 if_statinc(ifp, if_oerrors); 2130 continue; 2131 } 2132 bpf_mtap3(ic->ic_rawbpf, m0, BPF_D_OUT); 2133 if (wpi_tx_data(sc, m0, ni, 0) != 0) { 2134 if_statinc(ifp, if_oerrors); 2135 break; 2136 } 2137 } else { 2138 if (ic->ic_state != IEEE80211_S_RUN) 2139 break; 2140 IFQ_POLL(&ifp->if_snd, m0); 2141 if (m0 == NULL) 2142 break; 2143 2144 if (m0->m_len < sizeof (*eh) && 2145 (m0 = m_pullup(m0, sizeof (*eh))) == NULL) { 2146 if_statinc(ifp, if_oerrors); 2147 continue; 2148 } 2149 eh = mtod(m0, struct ether_header *); 2150 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 2151 if (ni == NULL) { 2152 m_freem(m0); 2153 if_statinc(ifp, if_oerrors); 2154 continue; 2155 } 2156 2157 /* classify mbuf so we can find which tx ring to use */ 2158 if (ieee80211_classify(ic, m0, ni) != 0) { 2159 m_freem(m0); 2160 ieee80211_free_node(ni); 2161 if_statinc(ifp, if_oerrors); 2162 continue; 2163 } 2164 2165 /* no QoS encapsulation for EAPOL frames */ 2166 ac = (eh->ether_type != htons(ETHERTYPE_PAE)) ? 2167 M_WME_GETAC(m0) : WME_AC_BE; 2168 2169 if (sc->txq[ac].queued > sc->txq[ac].count - 8) { 2170 /* there is no place left in this ring */ 2171 ifp->if_flags |= IFF_OACTIVE; 2172 break; 2173 } 2174 IFQ_DEQUEUE(&ifp->if_snd, m0); 2175 bpf_mtap(ifp, m0, BPF_D_OUT); 2176 m0 = ieee80211_encap(ic, m0, ni); 2177 if (m0 == NULL) { 2178 ieee80211_free_node(ni); 2179 if_statinc(ifp, if_oerrors); 2180 continue; 2181 } 2182 bpf_mtap3(ic->ic_rawbpf, m0, BPF_D_OUT); 2183 if (wpi_tx_data(sc, m0, ni, ac) != 0) { 2184 ieee80211_free_node(ni); 2185 if_statinc(ifp, if_oerrors); 2186 break; 2187 } 2188 } 2189 2190 sc->sc_tx_timer = 5; 2191 ifp->if_timer = 1; 2192 } 2193 } 2194 2195 static void 2196 wpi_watchdog(struct ifnet *ifp) 2197 { 2198 struct wpi_softc *sc = ifp->if_softc; 2199 2200 ifp->if_timer = 0; 2201 2202 if (sc->sc_tx_timer > 0) { 2203 if (--sc->sc_tx_timer == 0) { 2204 aprint_error_dev(sc->sc_dev, "device timeout\n"); 2205 ifp->if_flags &= ~IFF_UP; 2206 wpi_stop(ifp, 1); 2207 if_statinc(ifp, if_oerrors); 2208 return; 2209 } 2210 ifp->if_timer = 1; 2211 } 2212 2213 ieee80211_watchdog(&sc->sc_ic); 2214 } 2215 2216 static int 2217 wpi_ioctl(struct ifnet *ifp, u_long cmd, void *data) 2218 { 2219 #define IS_RUNNING(ifp) \ 2220 ((ifp->if_flags & IFF_UP) && (ifp->if_flags & IFF_RUNNING)) 2221 2222 struct wpi_softc *sc = ifp->if_softc; 2223 struct ieee80211com *ic = &sc->sc_ic; 2224 int s, error = 0; 2225 2226 s = splnet(); 2227 2228 switch (cmd) { 2229 case SIOCSIFFLAGS: 2230 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 2231 break; 2232 if (ifp->if_flags & IFF_UP) { 2233 if (!(ifp->if_flags & IFF_RUNNING)) 2234 wpi_init(ifp); 2235 } else { 2236 if (ifp->if_flags & IFF_RUNNING) 2237 wpi_stop(ifp, 1); 2238 } 2239 break; 2240 2241 case SIOCADDMULTI: 2242 case SIOCDELMULTI: 2243 /* XXX no h/w multicast filter? --dyoung */ 2244 if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) { 2245 /* setup multicast filter, etc */ 2246 error = 0; 2247 } 2248 break; 2249 2250 default: 2251 error = ieee80211_ioctl(ic, cmd, data); 2252 } 2253 2254 if (error == ENETRESET) { 2255 if (IS_RUNNING(ifp) && 2256 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2257 wpi_init(ifp); 2258 error = 0; 2259 } 2260 2261 splx(s); 2262 return error; 2263 2264 #undef IS_RUNNING 2265 } 2266 2267 /* 2268 * Extract various information from EEPROM. 2269 */ 2270 static void 2271 wpi_read_eeprom(struct wpi_softc *sc) 2272 { 2273 struct ieee80211com *ic = &sc->sc_ic; 2274 char domain[4]; 2275 int i; 2276 2277 wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap, 1); 2278 wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev, 2); 2279 wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1); 2280 2281 DPRINTF(("cap=%x rev=%x type=%x\n", sc->cap, le16toh(sc->rev), 2282 sc->type)); 2283 2284 /* read and print regulatory domain */ 2285 wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, domain, 4); 2286 aprint_normal_dev(sc->sc_dev, "%.4s", domain); 2287 2288 /* read and print MAC address */ 2289 wpi_read_prom_data(sc, WPI_EEPROM_MAC, ic->ic_myaddr, 6); 2290 aprint_normal(", address %s\n", ether_sprintf(ic->ic_myaddr)); 2291 2292 /* read the list of authorized channels */ 2293 for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++) 2294 wpi_read_eeprom_channels(sc, i); 2295 2296 /* read the list of power groups */ 2297 for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++) 2298 wpi_read_eeprom_group(sc, i); 2299 } 2300 2301 static void 2302 wpi_read_eeprom_channels(struct wpi_softc *sc, int n) 2303 { 2304 struct ieee80211com *ic = &sc->sc_ic; 2305 const struct wpi_chan_band *band = &wpi_bands[n]; 2306 struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND]; 2307 int chan, i; 2308 2309 wpi_read_prom_data(sc, band->addr, channels, 2310 band->nchan * sizeof (struct wpi_eeprom_chan)); 2311 2312 for (i = 0; i < band->nchan; i++) { 2313 if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID)) 2314 continue; 2315 2316 chan = band->chan[i]; 2317 2318 if (n == 0) { /* 2GHz band */ 2319 ic->ic_channels[chan].ic_freq = 2320 ieee80211_ieee2mhz(chan, IEEE80211_CHAN_2GHZ); 2321 ic->ic_channels[chan].ic_flags = 2322 IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | 2323 IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; 2324 2325 } else { /* 5GHz band */ 2326 /* 2327 * Some 3945ABG adapters support channels 7, 8, 11 2328 * and 12 in the 2GHz *and* 5GHz bands. 2329 * Because of limitations in our net80211(9) stack, 2330 * we can't support these channels in 5GHz band. 2331 */ 2332 if (chan <= 14) 2333 continue; 2334 2335 ic->ic_channels[chan].ic_freq = 2336 ieee80211_ieee2mhz(chan, IEEE80211_CHAN_5GHZ); 2337 ic->ic_channels[chan].ic_flags = IEEE80211_CHAN_A; 2338 } 2339 2340 /* is active scan allowed on this channel? */ 2341 if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) { 2342 ic->ic_channels[chan].ic_flags |= 2343 IEEE80211_CHAN_PASSIVE; 2344 } 2345 2346 /* save maximum allowed power for this channel */ 2347 sc->maxpwr[chan] = channels[i].maxpwr; 2348 2349 DPRINTF(("adding chan %d flags=0x%x maxpwr=%d\n", 2350 chan, channels[i].flags, sc->maxpwr[chan])); 2351 } 2352 } 2353 2354 static void 2355 wpi_read_eeprom_group(struct wpi_softc *sc, int n) 2356 { 2357 struct wpi_power_group *group = &sc->groups[n]; 2358 struct wpi_eeprom_group rgroup; 2359 int i; 2360 2361 wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup, 2362 sizeof rgroup); 2363 2364 /* save power group information */ 2365 group->chan = rgroup.chan; 2366 group->maxpwr = rgroup.maxpwr; 2367 /* temperature at which the samples were taken */ 2368 group->temp = (int16_t)le16toh(rgroup.temp); 2369 2370 DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n, 2371 group->chan, group->maxpwr, group->temp)); 2372 2373 for (i = 0; i < WPI_SAMPLES_COUNT; i++) { 2374 group->samples[i].index = rgroup.samples[i].index; 2375 group->samples[i].power = rgroup.samples[i].power; 2376 2377 DPRINTF(("\tsample %d: index=%d power=%d\n", i, 2378 group->samples[i].index, group->samples[i].power)); 2379 } 2380 } 2381 2382 /* 2383 * Send a command to the firmware. 2384 */ 2385 static int 2386 wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async) 2387 { 2388 struct wpi_tx_ring *ring = &sc->cmdq; 2389 struct wpi_tx_desc *desc; 2390 struct wpi_tx_cmd *cmd; 2391 struct wpi_dma_info *dma; 2392 2393 KASSERT(size <= sizeof cmd->data); 2394 2395 desc = &ring->desc[ring->cur]; 2396 cmd = &ring->cmd[ring->cur]; 2397 2398 cmd->code = code; 2399 cmd->flags = 0; 2400 cmd->qid = ring->qid; 2401 cmd->idx = ring->cur; 2402 memcpy(cmd->data, buf, size); 2403 2404 dma = &ring->cmd_dma; 2405 bus_dmamap_sync(dma->tag, dma->map, 0, dma->size, BUS_DMASYNC_PREWRITE); 2406 2407 desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24); 2408 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2409 ring->cur * sizeof (struct wpi_tx_cmd)); 2410 desc->segs[0].len = htole32(4 + size); 2411 2412 dma = &ring->desc_dma; 2413 bus_dmamap_sync(dma->tag, dma->map, 0, dma->size, BUS_DMASYNC_PREWRITE); 2414 2415 /* kick cmd ring */ 2416 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2417 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2418 2419 return async ? 0 : tsleep(cmd, PCATCH, "wpicmd", hz); 2420 } 2421 2422 static int 2423 wpi_wme_update(struct ieee80211com *ic) 2424 { 2425 #define WPI_EXP2(v) htole16((1 << (v)) - 1) 2426 #define WPI_USEC(v) htole16(IEEE80211_TXOP_TO_US(v)) 2427 struct wpi_softc *sc = ic->ic_ifp->if_softc; 2428 const struct wmeParams *wmep; 2429 struct wpi_wme_setup wme; 2430 int ac; 2431 2432 /* don't override default WME values if WME is not actually enabled */ 2433 if (!(ic->ic_flags & IEEE80211_F_WME)) 2434 return 0; 2435 2436 wme.flags = 0; 2437 for (ac = 0; ac < WME_NUM_AC; ac++) { 2438 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 2439 wme.ac[ac].aifsn = wmep->wmep_aifsn; 2440 wme.ac[ac].cwmin = WPI_EXP2(wmep->wmep_logcwmin); 2441 wme.ac[ac].cwmax = WPI_EXP2(wmep->wmep_logcwmax); 2442 wme.ac[ac].txop = WPI_USEC(wmep->wmep_txopLimit); 2443 2444 DPRINTF(("setting WME for queue %d aifsn=%d cwmin=%d cwmax=%d " 2445 "txop=%d\n", ac, wme.ac[ac].aifsn, wme.ac[ac].cwmin, 2446 wme.ac[ac].cwmax, wme.ac[ac].txop)); 2447 } 2448 2449 return wpi_cmd(sc, WPI_CMD_SET_WME, &wme, sizeof wme, 1); 2450 #undef WPI_USEC 2451 #undef WPI_EXP2 2452 } 2453 2454 /* 2455 * Configure h/w multi-rate retries. 2456 */ 2457 static int 2458 wpi_mrr_setup(struct wpi_softc *sc) 2459 { 2460 struct ieee80211com *ic = &sc->sc_ic; 2461 struct wpi_mrr_setup mrr; 2462 int i, error; 2463 2464 /* CCK rates (not used with 802.11a) */ 2465 for (i = WPI_CCK1; i <= WPI_CCK11; i++) { 2466 mrr.rates[i].flags = 0; 2467 mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; 2468 /* fallback to the immediate lower CCK rate (if any) */ 2469 mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1; 2470 /* try one time at this rate before falling back to "next" */ 2471 mrr.rates[i].ntries = 1; 2472 } 2473 2474 /* OFDM rates (not used with 802.11b) */ 2475 for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) { 2476 mrr.rates[i].flags = 0; 2477 mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; 2478 /* fallback to the immediate lower rate (if any) */ 2479 /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */ 2480 mrr.rates[i].next = (i == WPI_OFDM6) ? 2481 ((ic->ic_curmode == IEEE80211_MODE_11A) ? 2482 WPI_OFDM6 : WPI_CCK2) : 2483 i - 1; 2484 /* try one time at this rate before falling back to "next" */ 2485 mrr.rates[i].ntries = 1; 2486 } 2487 2488 /* setup MRR for control frames */ 2489 mrr.which = htole32(WPI_MRR_CTL); 2490 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2491 if (error != 0) { 2492 aprint_error_dev(sc->sc_dev, 2493 "could not setup MRR for control frames\n"); 2494 return error; 2495 } 2496 2497 /* setup MRR for data frames */ 2498 mrr.which = htole32(WPI_MRR_DATA); 2499 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2500 if (error != 0) { 2501 aprint_error_dev(sc->sc_dev, 2502 "could not setup MRR for data frames\n"); 2503 return error; 2504 } 2505 2506 return 0; 2507 } 2508 2509 static void 2510 wpi_set_led(struct wpi_softc *sc, uint8_t which, uint8_t off, uint8_t on) 2511 { 2512 struct wpi_cmd_led led; 2513 2514 led.which = which; 2515 led.unit = htole32(100000); /* on/off in unit of 100ms */ 2516 led.off = off; 2517 led.on = on; 2518 2519 (void)wpi_cmd(sc, WPI_CMD_SET_LED, &led, sizeof led, 1); 2520 } 2521 2522 static void 2523 wpi_enable_tsf(struct wpi_softc *sc, struct ieee80211_node *ni) 2524 { 2525 struct wpi_cmd_tsf tsf; 2526 uint64_t val, mod; 2527 2528 memset(&tsf, 0, sizeof tsf); 2529 memcpy(&tsf.tstamp, ni->ni_tstamp.data, sizeof (uint64_t)); 2530 tsf.bintval = htole16(ni->ni_intval); 2531 tsf.lintval = htole16(10); 2532 2533 /* compute remaining time until next beacon */ 2534 val = (uint64_t)ni->ni_intval * 1024; /* msecs -> usecs */ 2535 mod = le64toh(tsf.tstamp) % val; 2536 tsf.binitval = htole32((uint32_t)(val - mod)); 2537 2538 DPRINTF(("TSF bintval=%u tstamp=%" PRIu64 ", init=%u\n", 2539 ni->ni_intval, le64toh(tsf.tstamp), (uint32_t)(val - mod))); 2540 2541 if (wpi_cmd(sc, WPI_CMD_TSF, &tsf, sizeof tsf, 1) != 0) 2542 aprint_error_dev(sc->sc_dev, "could not enable TSF\n"); 2543 } 2544 2545 /* 2546 * Update Tx power to match what is defined for channel `c'. 2547 */ 2548 static int 2549 wpi_set_txpower(struct wpi_softc *sc, struct ieee80211_channel *c, int async) 2550 { 2551 struct ieee80211com *ic = &sc->sc_ic; 2552 struct wpi_power_group *group; 2553 struct wpi_cmd_txpower txpower; 2554 u_int chan; 2555 int i; 2556 2557 /* get channel number */ 2558 chan = ieee80211_chan2ieee(ic, c); 2559 2560 /* find the power group to which this channel belongs */ 2561 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2562 for (group = &sc->groups[1]; group < &sc->groups[4]; group++) 2563 if (chan <= group->chan) 2564 break; 2565 } else 2566 group = &sc->groups[0]; 2567 2568 memset(&txpower, 0, sizeof txpower); 2569 txpower.band = IEEE80211_IS_CHAN_5GHZ(c) ? 0 : 1; 2570 txpower.chan = htole16(chan); 2571 2572 /* set Tx power for all OFDM and CCK rates */ 2573 for (i = 0; i <= 11 ; i++) { 2574 /* retrieve Tx power for this channel/rate combination */ 2575 int idx = wpi_get_power_index(sc, group, c, 2576 wpi_ridx_to_rate[i]); 2577 2578 txpower.rates[i].plcp = wpi_ridx_to_plcp[i]; 2579 2580 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2581 txpower.rates[i].rf_gain = wpi_rf_gain_5ghz[idx]; 2582 txpower.rates[i].dsp_gain = wpi_dsp_gain_5ghz[idx]; 2583 } else { 2584 txpower.rates[i].rf_gain = wpi_rf_gain_2ghz[idx]; 2585 txpower.rates[i].dsp_gain = wpi_dsp_gain_2ghz[idx]; 2586 } 2587 DPRINTF(("chan %d/rate %d: power index %d\n", chan, 2588 wpi_ridx_to_rate[i], idx)); 2589 } 2590 2591 return wpi_cmd(sc, WPI_CMD_TXPOWER, &txpower, sizeof txpower, async); 2592 } 2593 2594 /* 2595 * Determine Tx power index for a given channel/rate combination. 2596 * This takes into account the regulatory information from EEPROM and the 2597 * current temperature. 2598 */ 2599 static int 2600 wpi_get_power_index(struct wpi_softc *sc, struct wpi_power_group *group, 2601 struct ieee80211_channel *c, int rate) 2602 { 2603 /* fixed-point arithmetic division using a n-bit fractional part */ 2604 #define fdivround(a, b, n) \ 2605 ((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n)) 2606 2607 /* linear interpolation */ 2608 #define interpolate(x, x1, y1, x2, y2, n) \ 2609 ((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n)) 2610 2611 struct ieee80211com *ic = &sc->sc_ic; 2612 struct wpi_power_sample *sample; 2613 int pwr, idx; 2614 u_int chan; 2615 2616 /* get channel number */ 2617 chan = ieee80211_chan2ieee(ic, c); 2618 2619 /* default power is group's maximum power - 3dB */ 2620 pwr = group->maxpwr / 2; 2621 2622 /* decrease power for highest OFDM rates to reduce distortion */ 2623 switch (rate) { 2624 case 72: /* 36Mb/s */ 2625 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 0 : 5; 2626 break; 2627 case 96: /* 48Mb/s */ 2628 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 7 : 10; 2629 break; 2630 case 108: /* 54Mb/s */ 2631 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 9 : 12; 2632 break; 2633 } 2634 2635 /* never exceed channel's maximum allowed Tx power */ 2636 pwr = uimin(pwr, sc->maxpwr[chan]); 2637 2638 /* retrieve power index into gain tables from samples */ 2639 for (sample = group->samples; sample < &group->samples[3]; sample++) 2640 if (pwr > sample[1].power) 2641 break; 2642 /* fixed-point linear interpolation using a 19-bit fractional part */ 2643 idx = interpolate(pwr, sample[0].power, sample[0].index, 2644 sample[1].power, sample[1].index, 19); 2645 2646 /*- 2647 * Adjust power index based on current temperature: 2648 * - if cooler than factory-calibrated: decrease output power 2649 * - if warmer than factory-calibrated: increase output power 2650 */ 2651 idx -= (sc->temp - group->temp) * 11 / 100; 2652 2653 /* decrease power for CCK rates (-5dB) */ 2654 if (!WPI_RATE_IS_OFDM(rate)) 2655 idx += 10; 2656 2657 /* keep power index in a valid range */ 2658 if (idx < 0) 2659 return 0; 2660 if (idx > WPI_MAX_PWR_INDEX) 2661 return WPI_MAX_PWR_INDEX; 2662 return idx; 2663 2664 #undef interpolate 2665 #undef fdivround 2666 } 2667 2668 /* 2669 * Build a beacon frame that the firmware will broadcast periodically in 2670 * IBSS or HostAP modes. 2671 */ 2672 static int 2673 wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni) 2674 { 2675 struct ieee80211com *ic = &sc->sc_ic; 2676 struct wpi_tx_ring *ring = &sc->cmdq; 2677 struct wpi_tx_desc *desc; 2678 struct wpi_tx_data *data; 2679 struct wpi_tx_cmd *cmd; 2680 struct wpi_cmd_beacon *bcn; 2681 struct ieee80211_beacon_offsets bo; 2682 struct mbuf *m0; 2683 int error; 2684 2685 desc = &ring->desc[ring->cur]; 2686 data = &ring->data[ring->cur]; 2687 2688 m0 = ieee80211_beacon_alloc(ic, ni, &bo); 2689 if (m0 == NULL) { 2690 aprint_error_dev(sc->sc_dev, 2691 "could not allocate beacon frame\n"); 2692 return ENOMEM; 2693 } 2694 2695 cmd = &ring->cmd[ring->cur]; 2696 cmd->code = WPI_CMD_SET_BEACON; 2697 cmd->flags = 0; 2698 cmd->qid = ring->qid; 2699 cmd->idx = ring->cur; 2700 2701 bcn = (struct wpi_cmd_beacon *)cmd->data; 2702 memset(bcn, 0, sizeof (struct wpi_cmd_beacon)); 2703 bcn->id = WPI_ID_BROADCAST; 2704 bcn->ofdm_mask = 0xff; 2705 bcn->cck_mask = 0x0f; 2706 bcn->lifetime = htole32(WPI_LIFETIME_INFINITE); 2707 bcn->len = htole16(m0->m_pkthdr.len); 2708 bcn->rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2709 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2710 bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP); 2711 2712 /* save and trim IEEE802.11 header */ 2713 m_copydata(m0, 0, sizeof (struct ieee80211_frame), (void *)&bcn->wh); 2714 m_adj(m0, sizeof (struct ieee80211_frame)); 2715 2716 /* assume beacon frame is contiguous */ 2717 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 2718 BUS_DMA_READ | BUS_DMA_NOWAIT); 2719 if (error != 0) { 2720 aprint_error_dev(sc->sc_dev, "could not map beacon\n"); 2721 m_freem(m0); 2722 return error; 2723 } 2724 2725 data->m = m0; 2726 2727 /* first scatter/gather segment is used by the beacon command */ 2728 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24); 2729 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2730 ring->cur * sizeof (struct wpi_tx_cmd)); 2731 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon)); 2732 desc->segs[1].addr = htole32(data->map->dm_segs[0].ds_addr); 2733 desc->segs[1].len = htole32(data->map->dm_segs[0].ds_len); 2734 2735 bus_dmamap_sync(sc->sc_dmat, ring->desc_dma.map, 0, 2736 ring->desc_dma.map->dm_mapsize, BUS_DMASYNC_PREWRITE); 2737 bus_dmamap_sync(sc->sc_dmat, data->map, 0, data->map->dm_mapsize, 2738 BUS_DMASYNC_PREWRITE); 2739 2740 /* kick cmd ring */ 2741 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2742 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2743 2744 return 0; 2745 } 2746 2747 static int 2748 wpi_auth(struct wpi_softc *sc) 2749 { 2750 struct ieee80211com *ic = &sc->sc_ic; 2751 struct ieee80211_node *ni = ic->ic_bss; 2752 struct wpi_node_info node; 2753 int error; 2754 2755 /* update adapter's configuration */ 2756 IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid); 2757 sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan); 2758 sc->config.flags = htole32(WPI_CONFIG_TSF); 2759 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 2760 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2761 WPI_CONFIG_24GHZ); 2762 } 2763 switch (ic->ic_curmode) { 2764 case IEEE80211_MODE_11A: 2765 sc->config.cck_mask = 0; 2766 sc->config.ofdm_mask = 0x15; 2767 break; 2768 case IEEE80211_MODE_11B: 2769 sc->config.cck_mask = 0x03; 2770 sc->config.ofdm_mask = 0; 2771 break; 2772 default: /* assume 802.11b/g */ 2773 sc->config.cck_mask = 0x0f; 2774 sc->config.ofdm_mask = 0x15; 2775 } 2776 DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan, 2777 sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask)); 2778 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2779 sizeof (struct wpi_config), 1); 2780 if (error != 0) { 2781 aprint_error_dev(sc->sc_dev, "could not configure\n"); 2782 return error; 2783 } 2784 2785 /* configuration has changed, set Tx power accordingly */ 2786 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { 2787 aprint_error_dev(sc->sc_dev, "could not set Tx power\n"); 2788 return error; 2789 } 2790 2791 /* add default node */ 2792 memset(&node, 0, sizeof node); 2793 IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid); 2794 node.id = WPI_ID_BSS; 2795 node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2796 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2797 node.action = htole32(WPI_ACTION_SET_RATE); 2798 node.antenna = WPI_ANTENNA_BOTH; 2799 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1); 2800 if (error != 0) { 2801 aprint_error_dev(sc->sc_dev, "could not add BSS node\n"); 2802 return error; 2803 } 2804 2805 return 0; 2806 } 2807 2808 /* 2809 * Send a scan request to the firmware. Since this command is huge, we map it 2810 * into a mbuf instead of using the pre-allocated set of commands. 2811 */ 2812 static int 2813 wpi_scan(struct wpi_softc *sc) 2814 { 2815 struct ieee80211com *ic = &sc->sc_ic; 2816 struct wpi_tx_ring *ring = &sc->cmdq; 2817 struct wpi_tx_desc *desc; 2818 struct wpi_tx_data *data; 2819 struct wpi_tx_cmd *cmd; 2820 struct wpi_scan_hdr *hdr; 2821 struct wpi_scan_chan *chan; 2822 struct ieee80211_frame *wh; 2823 struct ieee80211_rateset *rs; 2824 struct ieee80211_channel *c; 2825 uint8_t *frm; 2826 int pktlen, error, nrates; 2827 2828 if (ic->ic_curchan == NULL) 2829 return EIO; 2830 2831 desc = &ring->desc[ring->cur]; 2832 data = &ring->data[ring->cur]; 2833 2834 MGETHDR(data->m, M_DONTWAIT, MT_DATA); 2835 if (data->m == NULL) { 2836 aprint_error_dev(sc->sc_dev, 2837 "could not allocate mbuf for scan command\n"); 2838 return ENOMEM; 2839 } 2840 MCLGET(data->m, M_DONTWAIT); 2841 if (!(data->m->m_flags & M_EXT)) { 2842 m_freem(data->m); 2843 data->m = NULL; 2844 aprint_error_dev(sc->sc_dev, 2845 "could not allocate mbuf for scan command\n"); 2846 return ENOMEM; 2847 } 2848 2849 cmd = mtod(data->m, struct wpi_tx_cmd *); 2850 cmd->code = WPI_CMD_SCAN; 2851 cmd->flags = 0; 2852 cmd->qid = ring->qid; 2853 cmd->idx = ring->cur; 2854 2855 hdr = (struct wpi_scan_hdr *)cmd->data; 2856 memset(hdr, 0, sizeof (struct wpi_scan_hdr)); 2857 hdr->cmd.flags = htole32(WPI_TX_AUTO_SEQ); 2858 hdr->cmd.id = WPI_ID_BROADCAST; 2859 hdr->cmd.lifetime = htole32(WPI_LIFETIME_INFINITE); 2860 /* 2861 * Move to the next channel if no packets are received within 5 msecs 2862 * after sending the probe request (this helps to reduce the duration 2863 * of active scans). 2864 */ 2865 hdr->quiet = htole16(5); /* timeout in milliseconds */ 2866 hdr->plcp_threshold = htole16(1); /* min # of packets */ 2867 2868 if (ic->ic_curchan->ic_flags & IEEE80211_CHAN_5GHZ) { 2869 hdr->crc_threshold = htole16(1); 2870 /* send probe requests at 6Mbps */ 2871 hdr->cmd.rate = wpi_plcp_signal(12); 2872 rs = &ic->ic_sup_rates[IEEE80211_MODE_11A]; 2873 } else { 2874 hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO); 2875 /* send probe requests at 1Mbps */ 2876 hdr->cmd.rate = wpi_plcp_signal(2); 2877 rs = &ic->ic_sup_rates[IEEE80211_MODE_11G]; 2878 } 2879 2880 /* for directed scans, firmware inserts the essid IE itself */ 2881 if (ic->ic_des_esslen != 0) { 2882 hdr->essid[0].id = IEEE80211_ELEMID_SSID; 2883 hdr->essid[0].len = ic->ic_des_esslen; 2884 memcpy(hdr->essid[0].data, ic->ic_des_essid, ic->ic_des_esslen); 2885 } 2886 2887 /* 2888 * Build a probe request frame. Most of the following code is a 2889 * copy & paste of what is done in net80211. 2890 */ 2891 wh = (struct ieee80211_frame *)(hdr + 1); 2892 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 2893 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 2894 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2895 IEEE80211_ADDR_COPY(wh->i_addr1, etherbroadcastaddr); 2896 IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); 2897 IEEE80211_ADDR_COPY(wh->i_addr3, etherbroadcastaddr); 2898 *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */ 2899 *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */ 2900 2901 frm = (uint8_t *)(wh + 1); 2902 2903 /* add empty essid IE (firmware generates it for directed scans) */ 2904 *frm++ = IEEE80211_ELEMID_SSID; 2905 *frm++ = 0; 2906 2907 /* add supported rates IE */ 2908 *frm++ = IEEE80211_ELEMID_RATES; 2909 nrates = rs->rs_nrates; 2910 if (nrates > IEEE80211_RATE_SIZE) 2911 nrates = IEEE80211_RATE_SIZE; 2912 *frm++ = nrates; 2913 memcpy(frm, rs->rs_rates, nrates); 2914 frm += nrates; 2915 2916 /* add supported xrates IE */ 2917 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 2918 nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 2919 *frm++ = IEEE80211_ELEMID_XRATES; 2920 *frm++ = nrates; 2921 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 2922 frm += nrates; 2923 } 2924 2925 /* setup length of probe request */ 2926 hdr->cmd.len = htole16(frm - (uint8_t *)wh); 2927 2928 chan = (struct wpi_scan_chan *)frm; 2929 c = ic->ic_curchan; 2930 2931 chan->chan = ieee80211_chan2ieee(ic, c); 2932 chan->flags = 0; 2933 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2934 chan->flags |= WPI_CHAN_ACTIVE; 2935 if (ic->ic_des_esslen != 0) 2936 chan->flags |= WPI_CHAN_DIRECT; 2937 } 2938 chan->dsp_gain = 0x6e; 2939 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2940 chan->rf_gain = 0x3b; 2941 chan->active = htole16(10); 2942 chan->passive = htole16(110); 2943 } else { 2944 chan->rf_gain = 0x28; 2945 chan->active = htole16(20); 2946 chan->passive = htole16(120); 2947 } 2948 hdr->nchan++; 2949 chan++; 2950 2951 frm += sizeof (struct wpi_scan_chan); 2952 2953 hdr->len = htole16(frm - (uint8_t *)hdr); 2954 pktlen = frm - (uint8_t *)cmd; 2955 2956 error = bus_dmamap_load(sc->sc_dmat, data->map, cmd, pktlen, NULL, 2957 BUS_DMA_NOWAIT); 2958 if (error != 0) { 2959 aprint_error_dev(sc->sc_dev, "could not map scan command\n"); 2960 m_freem(data->m); 2961 data->m = NULL; 2962 return error; 2963 } 2964 2965 desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24); 2966 desc->segs[0].addr = htole32(data->map->dm_segs[0].ds_addr); 2967 desc->segs[0].len = htole32(data->map->dm_segs[0].ds_len); 2968 2969 bus_dmamap_sync(sc->sc_dmat, ring->desc_dma.map, 0, 2970 ring->desc_dma.map->dm_mapsize, BUS_DMASYNC_PREWRITE); 2971 bus_dmamap_sync(sc->sc_dmat, data->map, 0, data->map->dm_mapsize, 2972 BUS_DMASYNC_PREWRITE); 2973 2974 /* kick cmd ring */ 2975 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2976 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2977 2978 return 0; /* will be notified async. of failure/success */ 2979 } 2980 2981 static int 2982 wpi_config(struct wpi_softc *sc) 2983 { 2984 struct ieee80211com *ic = &sc->sc_ic; 2985 struct ifnet *ifp = ic->ic_ifp; 2986 struct wpi_power power; 2987 struct wpi_bluetooth bluetooth; 2988 struct wpi_node_info node; 2989 int error; 2990 2991 memset(&power, 0, sizeof power); 2992 power.flags = htole32(WPI_POWER_CAM | 0x8); 2993 error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0); 2994 if (error != 0) { 2995 aprint_error_dev(sc->sc_dev, "could not set power mode\n"); 2996 return error; 2997 } 2998 2999 /* configure bluetooth coexistence */ 3000 memset(&bluetooth, 0, sizeof bluetooth); 3001 bluetooth.flags = 3; 3002 bluetooth.lead = 0xaa; 3003 bluetooth.kill = 1; 3004 error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth, 3005 0); 3006 if (error != 0) { 3007 aprint_error_dev(sc->sc_dev, 3008 "could not configure bluetooth coexistence\n"); 3009 return error; 3010 } 3011 3012 /* configure adapter */ 3013 memset(&sc->config, 0, sizeof (struct wpi_config)); 3014 IEEE80211_ADDR_COPY(ic->ic_myaddr, CLLADDR(ifp->if_sadl)); 3015 IEEE80211_ADDR_COPY(sc->config.myaddr, ic->ic_myaddr); 3016 /* set default channel */ 3017 sc->config.chan = ieee80211_chan2ieee(ic, ic->ic_curchan); 3018 sc->config.flags = htole32(WPI_CONFIG_TSF); 3019 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) { 3020 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 3021 WPI_CONFIG_24GHZ); 3022 } 3023 sc->config.filter = 0; 3024 switch (ic->ic_opmode) { 3025 case IEEE80211_M_STA: 3026 sc->config.mode = WPI_MODE_STA; 3027 sc->config.filter |= htole32(WPI_FILTER_MULTICAST); 3028 break; 3029 case IEEE80211_M_IBSS: 3030 case IEEE80211_M_AHDEMO: 3031 sc->config.mode = WPI_MODE_IBSS; 3032 break; 3033 case IEEE80211_M_HOSTAP: 3034 sc->config.mode = WPI_MODE_HOSTAP; 3035 break; 3036 case IEEE80211_M_MONITOR: 3037 sc->config.mode = WPI_MODE_MONITOR; 3038 sc->config.filter |= htole32(WPI_FILTER_MULTICAST | 3039 WPI_FILTER_CTL | WPI_FILTER_PROMISC); 3040 break; 3041 } 3042 sc->config.cck_mask = 0x0f; /* not yet negotiated */ 3043 sc->config.ofdm_mask = 0xff; /* not yet negotiated */ 3044 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 3045 sizeof (struct wpi_config), 0); 3046 if (error != 0) { 3047 aprint_error_dev(sc->sc_dev, "configure command failed\n"); 3048 return error; 3049 } 3050 3051 /* configuration has changed, set Tx power accordingly */ 3052 if ((error = wpi_set_txpower(sc, ic->ic_curchan, 0)) != 0) { 3053 aprint_error_dev(sc->sc_dev, "could not set Tx power\n"); 3054 return error; 3055 } 3056 3057 /* add broadcast node */ 3058 memset(&node, 0, sizeof node); 3059 IEEE80211_ADDR_COPY(node.bssid, etherbroadcastaddr); 3060 node.id = WPI_ID_BROADCAST; 3061 node.rate = wpi_plcp_signal(2); 3062 node.action = htole32(WPI_ACTION_SET_RATE); 3063 node.antenna = WPI_ANTENNA_BOTH; 3064 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0); 3065 if (error != 0) { 3066 aprint_error_dev(sc->sc_dev, "could not add broadcast node\n"); 3067 return error; 3068 } 3069 3070 if ((error = wpi_mrr_setup(sc)) != 0) { 3071 aprint_error_dev(sc->sc_dev, "could not setup MRR\n"); 3072 return error; 3073 } 3074 3075 return 0; 3076 } 3077 3078 static void 3079 wpi_stop_master(struct wpi_softc *sc) 3080 { 3081 uint32_t tmp; 3082 int ntries; 3083 3084 tmp = WPI_READ(sc, WPI_RESET); 3085 WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER); 3086 3087 tmp = WPI_READ(sc, WPI_GPIO_CTL); 3088 if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP) 3089 return; /* already asleep */ 3090 3091 for (ntries = 0; ntries < 100; ntries++) { 3092 if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED) 3093 break; 3094 DELAY(10); 3095 } 3096 if (ntries == 100) { 3097 aprint_error_dev(sc->sc_dev, "timeout waiting for master\n"); 3098 } 3099 } 3100 3101 static int 3102 wpi_power_up(struct wpi_softc *sc) 3103 { 3104 uint32_t tmp; 3105 int ntries; 3106 3107 wpi_mem_lock(sc); 3108 tmp = wpi_mem_read(sc, WPI_MEM_POWER); 3109 wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000); 3110 wpi_mem_unlock(sc); 3111 3112 for (ntries = 0; ntries < 5000; ntries++) { 3113 if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED) 3114 break; 3115 DELAY(10); 3116 } 3117 if (ntries == 5000) { 3118 aprint_error_dev(sc->sc_dev, 3119 "timeout waiting for NIC to power up\n"); 3120 return ETIMEDOUT; 3121 } 3122 return 0; 3123 } 3124 3125 static int 3126 wpi_reset(struct wpi_softc *sc) 3127 { 3128 uint32_t tmp; 3129 int ntries; 3130 3131 /* clear any pending interrupts */ 3132 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 3133 3134 tmp = WPI_READ(sc, WPI_PLL_CTL); 3135 WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT); 3136 3137 tmp = WPI_READ(sc, WPI_CHICKEN); 3138 WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS); 3139 3140 tmp = WPI_READ(sc, WPI_GPIO_CTL); 3141 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT); 3142 3143 /* wait for clock stabilization */ 3144 for (ntries = 0; ntries < 1000; ntries++) { 3145 if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK) 3146 break; 3147 DELAY(10); 3148 } 3149 if (ntries == 1000) { 3150 aprint_error_dev(sc->sc_dev, 3151 "timeout waiting for clock stabilization\n"); 3152 return ETIMEDOUT; 3153 } 3154 3155 /* initialize EEPROM */ 3156 tmp = WPI_READ(sc, WPI_EEPROM_STATUS); 3157 if ((tmp & WPI_EEPROM_VERSION) == 0) { 3158 aprint_error_dev(sc->sc_dev, "EEPROM not found\n"); 3159 return EIO; 3160 } 3161 WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED); 3162 3163 return 0; 3164 } 3165 3166 static void 3167 wpi_hw_config(struct wpi_softc *sc) 3168 { 3169 uint32_t rev, hw; 3170 3171 /* voodoo from the reference driver */ 3172 hw = WPI_READ(sc, WPI_HWCONFIG); 3173 3174 rev = pci_conf_read(sc->sc_pct, sc->sc_pcitag, PCI_CLASS_REG); 3175 rev = PCI_REVISION(rev); 3176 if ((rev & 0xc0) == 0x40) 3177 hw |= WPI_HW_ALM_MB; 3178 else if (!(rev & 0x80)) 3179 hw |= WPI_HW_ALM_MM; 3180 3181 if (sc->cap == 0x80) 3182 hw |= WPI_HW_SKU_MRC; 3183 3184 hw &= ~WPI_HW_REV_D; 3185 if ((le16toh(sc->rev) & 0xf0) == 0xd0) 3186 hw |= WPI_HW_REV_D; 3187 3188 if (sc->type > 1) 3189 hw |= WPI_HW_TYPE_B; 3190 3191 DPRINTF(("setting h/w config %x\n", hw)); 3192 WPI_WRITE(sc, WPI_HWCONFIG, hw); 3193 } 3194 3195 static int 3196 wpi_init(struct ifnet *ifp) 3197 { 3198 struct wpi_softc *sc = ifp->if_softc; 3199 struct ieee80211com *ic = &sc->sc_ic; 3200 uint32_t tmp; 3201 int qid, ntries, error; 3202 3203 wpi_stop(ifp,1); 3204 (void)wpi_reset(sc); 3205 3206 wpi_mem_lock(sc); 3207 wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00); 3208 DELAY(20); 3209 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 3210 wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800); 3211 wpi_mem_unlock(sc); 3212 3213 (void)wpi_power_up(sc); 3214 wpi_hw_config(sc); 3215 3216 /* init Rx ring */ 3217 wpi_mem_lock(sc); 3218 WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr); 3219 WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr + 3220 offsetof(struct wpi_shared, next)); 3221 WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7); 3222 WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010); 3223 wpi_mem_unlock(sc); 3224 3225 /* init Tx rings */ 3226 wpi_mem_lock(sc); 3227 wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */ 3228 wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */ 3229 wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */ 3230 wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000); 3231 wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002); 3232 wpi_mem_write(sc, WPI_MEM_MAGIC4, 4); 3233 wpi_mem_write(sc, WPI_MEM_MAGIC5, 5); 3234 3235 WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr); 3236 WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5); 3237 3238 for (qid = 0; qid < 6; qid++) { 3239 WPI_WRITE(sc, WPI_TX_CTL(qid), 0); 3240 WPI_WRITE(sc, WPI_TX_BASE(qid), 0); 3241 WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008); 3242 } 3243 wpi_mem_unlock(sc); 3244 3245 /* clear "radio off" and "disable command" bits (reversed logic) */ 3246 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3247 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3248 3249 /* clear any pending interrupts */ 3250 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 3251 /* enable interrupts */ 3252 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 3253 3254 /* not sure why/if this is necessary... */ 3255 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3256 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3257 3258 if ((error = wpi_load_firmware(sc)) != 0) 3259 /* wpi_load_firmware prints error messages for us. */ 3260 goto fail1; 3261 3262 /* Check the status of the radio switch */ 3263 mutex_enter(&sc->sc_rsw_mtx); 3264 if (wpi_getrfkill(sc)) { 3265 mutex_exit(&sc->sc_rsw_mtx); 3266 aprint_error_dev(sc->sc_dev, 3267 "radio is disabled by hardware switch\n"); 3268 ifp->if_flags &= ~IFF_UP; 3269 error = EBUSY; 3270 goto fail1; 3271 } 3272 sc->sc_rsw_suspend = false; 3273 cv_broadcast(&sc->sc_rsw_cv); 3274 while (sc->sc_rsw_suspend) 3275 cv_wait(&sc->sc_rsw_cv, &sc->sc_rsw_mtx); 3276 mutex_exit(&sc->sc_rsw_mtx); 3277 3278 /* wait for thermal sensors to calibrate */ 3279 for (ntries = 0; ntries < 1000; ntries++) { 3280 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3281 break; 3282 DELAY(10); 3283 } 3284 if (ntries == 1000) { 3285 aprint_error_dev(sc->sc_dev, 3286 "timeout waiting for thermal sensors calibration\n"); 3287 error = ETIMEDOUT; 3288 goto fail1; 3289 } 3290 DPRINTF(("temperature %d\n", sc->temp)); 3291 3292 if ((error = wpi_config(sc)) != 0) { 3293 aprint_error_dev(sc->sc_dev, "could not configure device\n"); 3294 goto fail1; 3295 } 3296 3297 ifp->if_flags &= ~IFF_OACTIVE; 3298 ifp->if_flags |= IFF_RUNNING; 3299 3300 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 3301 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 3302 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 3303 } 3304 else 3305 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 3306 3307 return 0; 3308 3309 fail1: wpi_stop(ifp, 1); 3310 return error; 3311 } 3312 3313 static void 3314 wpi_stop(struct ifnet *ifp, int disable) 3315 { 3316 struct wpi_softc *sc = ifp->if_softc; 3317 struct ieee80211com *ic = &sc->sc_ic; 3318 uint32_t tmp; 3319 int ac; 3320 3321 ifp->if_timer = sc->sc_tx_timer = 0; 3322 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 3323 3324 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 3325 3326 /* suspend rfkill test thread */ 3327 mutex_enter(&sc->sc_rsw_mtx); 3328 sc->sc_rsw_suspend = true; 3329 cv_broadcast(&sc->sc_rsw_cv); 3330 while (!sc->sc_rsw_suspended) 3331 cv_wait(&sc->sc_rsw_cv, &sc->sc_rsw_mtx); 3332 mutex_exit(&sc->sc_rsw_mtx); 3333 3334 /* disable interrupts */ 3335 WPI_WRITE(sc, WPI_MASK, 0); 3336 WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK); 3337 WPI_WRITE(sc, WPI_INTR_STATUS, 0xff); 3338 WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000); 3339 3340 wpi_mem_lock(sc); 3341 wpi_mem_write(sc, WPI_MEM_MODE, 0); 3342 wpi_mem_unlock(sc); 3343 3344 /* reset all Tx rings */ 3345 for (ac = 0; ac < 4; ac++) 3346 wpi_reset_tx_ring(sc, &sc->txq[ac]); 3347 wpi_reset_tx_ring(sc, &sc->cmdq); 3348 3349 /* reset Rx ring */ 3350 wpi_reset_rx_ring(sc, &sc->rxq); 3351 3352 wpi_mem_lock(sc); 3353 wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200); 3354 wpi_mem_unlock(sc); 3355 3356 DELAY(5); 3357 3358 wpi_stop_master(sc); 3359 3360 tmp = WPI_READ(sc, WPI_RESET); 3361 WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET); 3362 } 3363 3364 static bool 3365 wpi_resume(device_t dv, const pmf_qual_t *qual) 3366 { 3367 struct wpi_softc *sc = device_private(dv); 3368 3369 (void)wpi_reset(sc); 3370 3371 return true; 3372 } 3373 3374 /* 3375 * Return whether or not the radio is enabled in hardware 3376 * (i.e. the rfkill switch is "off"). 3377 */ 3378 static int 3379 wpi_getrfkill(struct wpi_softc *sc) 3380 { 3381 uint32_t tmp; 3382 3383 wpi_mem_lock(sc); 3384 tmp = wpi_mem_read(sc, WPI_MEM_RFKILL); 3385 wpi_mem_unlock(sc); 3386 3387 KASSERT(mutex_owned(&sc->sc_rsw_mtx)); 3388 if (tmp & 0x01) { 3389 /* switch is on */ 3390 if (sc->sc_rsw_status != WPI_RSW_ON) { 3391 sc->sc_rsw_status = WPI_RSW_ON; 3392 sysmon_pswitch_event(&sc->sc_rsw, 3393 PSWITCH_EVENT_PRESSED); 3394 } 3395 } else { 3396 /* switch is off */ 3397 if (sc->sc_rsw_status != WPI_RSW_OFF) { 3398 sc->sc_rsw_status = WPI_RSW_OFF; 3399 sysmon_pswitch_event(&sc->sc_rsw, 3400 PSWITCH_EVENT_RELEASED); 3401 } 3402 } 3403 3404 return !(tmp & 0x01); 3405 } 3406 3407 static int 3408 wpi_sysctl_radio(SYSCTLFN_ARGS) 3409 { 3410 struct sysctlnode node; 3411 struct wpi_softc *sc; 3412 int val, error; 3413 3414 node = *rnode; 3415 sc = (struct wpi_softc *)node.sysctl_data; 3416 3417 mutex_enter(&sc->sc_rsw_mtx); 3418 val = !wpi_getrfkill(sc); 3419 mutex_exit(&sc->sc_rsw_mtx); 3420 3421 node.sysctl_data = &val; 3422 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 3423 3424 if (error || newp == NULL) 3425 return error; 3426 3427 return 0; 3428 } 3429 3430 static void 3431 wpi_sysctlattach(struct wpi_softc *sc) 3432 { 3433 int rc; 3434 const struct sysctlnode *rnode; 3435 const struct sysctlnode *cnode; 3436 3437 struct sysctllog **clog = &sc->sc_sysctllog; 3438 3439 if ((rc = sysctl_createv(clog, 0, NULL, &rnode, 3440 CTLFLAG_PERMANENT, CTLTYPE_NODE, device_xname(sc->sc_dev), 3441 SYSCTL_DESCR("wpi controls and statistics"), 3442 NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL)) != 0) 3443 goto err; 3444 3445 if ((rc = sysctl_createv(clog, 0, &rnode, &cnode, 3446 CTLFLAG_PERMANENT, CTLTYPE_INT, "radio", 3447 SYSCTL_DESCR("radio transmitter switch state (0=off, 1=on)"), 3448 wpi_sysctl_radio, 0, (void *)sc, 0, CTL_CREATE, CTL_EOL)) != 0) 3449 goto err; 3450 3451 #ifdef WPI_DEBUG 3452 /* control debugging printfs */ 3453 if ((rc = sysctl_createv(clog, 0, &rnode, &cnode, 3454 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 3455 "debug", SYSCTL_DESCR("Enable debugging output"), 3456 NULL, 0, &wpi_debug, 0, CTL_CREATE, CTL_EOL)) != 0) 3457 goto err; 3458 #endif 3459 3460 return; 3461 err: 3462 aprint_error("%s: sysctl_createv failed (rc = %d)\n", __func__, rc); 3463 } 3464 3465 static void 3466 wpi_rsw_thread(void *arg) 3467 { 3468 struct wpi_softc *sc = (struct wpi_softc *)arg; 3469 3470 mutex_enter(&sc->sc_rsw_mtx); 3471 for (;;) { 3472 cv_timedwait(&sc->sc_rsw_cv, &sc->sc_rsw_mtx, hz); 3473 if (sc->sc_dying) { 3474 sc->sc_rsw_lwp = NULL; 3475 cv_broadcast(&sc->sc_rsw_cv); 3476 mutex_exit(&sc->sc_rsw_mtx); 3477 kthread_exit(0); 3478 } 3479 if (sc->sc_rsw_suspend) { 3480 sc->sc_rsw_suspended = true; 3481 cv_broadcast(&sc->sc_rsw_cv); 3482 while (sc->sc_rsw_suspend || sc->sc_dying) 3483 cv_wait(&sc->sc_rsw_cv, &sc->sc_rsw_mtx); 3484 sc->sc_rsw_suspended = false; 3485 cv_broadcast(&sc->sc_rsw_cv); 3486 } 3487 wpi_getrfkill(sc); 3488 } 3489 } 3490
Indexes created Thu Oct 02 01:09:59 GMT 2025