if_wpi.c revision 1.61
1 /* $NetBSD: if_wpi.c,v 1.61 2014/07/05 17:18:11 jakllsch 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 1.61 2014/07/05 17:18:11 jakllsch 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 43 #include <sys/bus.h> 44 #include <machine/endian.h> 45 #include <sys/intr.h> 46 47 #include <dev/pci/pcireg.h> 48 #include <dev/pci/pcivar.h> 49 #include <dev/pci/pcidevs.h> 50 51 #include <net/bpf.h> 52 #include <net/if.h> 53 #include <net/if_arp.h> 54 #include <net/if_dl.h> 55 #include <net/if_ether.h> 56 #include <net/if_media.h> 57 #include <net/if_types.h> 58 59 #include <netinet/in.h> 60 #include <netinet/in_systm.h> 61 #include <netinet/in_var.h> 62 #include <netinet/ip.h> 63 64 #include <net80211/ieee80211_var.h> 65 #include <net80211/ieee80211_amrr.h> 66 #include <net80211/ieee80211_radiotap.h> 67 68 #include <dev/firmload.h> 69 70 #include <dev/pci/if_wpireg.h> 71 #include <dev/pci/if_wpivar.h> 72 73 static const char wpi_firmware_name[] = "iwlwifi-3945.ucode"; 74 static once_t wpi_firmware_init; 75 static kmutex_t wpi_firmware_mutex; 76 static size_t wpi_firmware_users; 77 static uint8_t *wpi_firmware_image; 78 static size_t wpi_firmware_size; 79 80 static int wpi_match(device_t, cfdata_t, void *); 81 static void wpi_attach(device_t, device_t, void *); 82 static int wpi_detach(device_t , int); 83 static int wpi_dma_contig_alloc(bus_dma_tag_t, struct wpi_dma_info *, 84 void **, bus_size_t, bus_size_t, int); 85 static void wpi_dma_contig_free(struct wpi_dma_info *); 86 static int wpi_alloc_shared(struct wpi_softc *); 87 static void wpi_free_shared(struct wpi_softc *); 88 static int wpi_alloc_fwmem(struct wpi_softc *); 89 static void wpi_free_fwmem(struct wpi_softc *); 90 static struct wpi_rbuf *wpi_alloc_rbuf(struct wpi_softc *); 91 static void wpi_free_rbuf(struct mbuf *, void *, size_t, void *); 92 static int wpi_alloc_rpool(struct wpi_softc *); 93 static void wpi_free_rpool(struct wpi_softc *); 94 static int wpi_alloc_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 95 static void wpi_reset_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 96 static void wpi_free_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 97 static int wpi_alloc_tx_ring(struct wpi_softc *, struct wpi_tx_ring *, 98 int, int); 99 static void wpi_reset_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 100 static void wpi_free_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 101 static struct ieee80211_node * wpi_node_alloc(struct ieee80211_node_table *); 102 static void wpi_newassoc(struct ieee80211_node *, int); 103 static int wpi_media_change(struct ifnet *); 104 static int wpi_newstate(struct ieee80211com *, enum ieee80211_state, int); 105 static void wpi_fix_channel(struct ieee80211com *, struct mbuf *); 106 static void wpi_mem_lock(struct wpi_softc *); 107 static void wpi_mem_unlock(struct wpi_softc *); 108 static uint32_t wpi_mem_read(struct wpi_softc *, uint16_t); 109 static void wpi_mem_write(struct wpi_softc *, uint16_t, uint32_t); 110 static void wpi_mem_write_region_4(struct wpi_softc *, uint16_t, 111 const uint32_t *, int); 112 static int wpi_read_prom_data(struct wpi_softc *, uint32_t, void *, int); 113 static int wpi_load_microcode(struct wpi_softc *, const uint8_t *, int); 114 static int wpi_cache_firmware(struct wpi_softc *); 115 static void wpi_release_firmware(void); 116 static int wpi_load_firmware(struct wpi_softc *); 117 static void wpi_calib_timeout(void *); 118 static void wpi_iter_func(void *, struct ieee80211_node *); 119 static void wpi_power_calibration(struct wpi_softc *, int); 120 static void wpi_rx_intr(struct wpi_softc *, struct wpi_rx_desc *, 121 struct wpi_rx_data *); 122 static void wpi_tx_intr(struct wpi_softc *, struct wpi_rx_desc *); 123 static void wpi_cmd_intr(struct wpi_softc *, struct wpi_rx_desc *); 124 static void wpi_notif_intr(struct wpi_softc *); 125 static int wpi_intr(void *); 126 static void wpi_read_eeprom(struct wpi_softc *); 127 static void wpi_read_eeprom_channels(struct wpi_softc *, int); 128 static void wpi_read_eeprom_group(struct wpi_softc *, int); 129 static uint8_t wpi_plcp_signal(int); 130 static int wpi_tx_data(struct wpi_softc *, struct mbuf *, 131 struct ieee80211_node *, int); 132 static void wpi_start(struct ifnet *); 133 static void wpi_watchdog(struct ifnet *); 134 static int wpi_ioctl(struct ifnet *, u_long, void *); 135 static int wpi_cmd(struct wpi_softc *, int, const void *, int, int); 136 static int wpi_wme_update(struct ieee80211com *); 137 static int wpi_mrr_setup(struct wpi_softc *); 138 static void wpi_set_led(struct wpi_softc *, uint8_t, uint8_t, uint8_t); 139 static void wpi_enable_tsf(struct wpi_softc *, struct ieee80211_node *); 140 static int wpi_set_txpower(struct wpi_softc *, 141 struct ieee80211_channel *, int); 142 static int wpi_get_power_index(struct wpi_softc *, 143 struct wpi_power_group *, struct ieee80211_channel *, int); 144 static int wpi_setup_beacon(struct wpi_softc *, struct ieee80211_node *); 145 static int wpi_auth(struct wpi_softc *); 146 static int wpi_scan(struct wpi_softc *, uint16_t); 147 static int wpi_config(struct wpi_softc *); 148 static void wpi_stop_master(struct wpi_softc *); 149 static int wpi_power_up(struct wpi_softc *); 150 static int wpi_reset(struct wpi_softc *); 151 static void wpi_hw_config(struct wpi_softc *); 152 static int wpi_init(struct ifnet *); 153 static void wpi_stop(struct ifnet *, int); 154 static bool wpi_resume(device_t, const pmf_qual_t *); 155 static int wpi_getrfkill(struct wpi_softc *); 156 static void wpi_sysctlattach(struct wpi_softc *); 157 158 #ifdef WPI_DEBUG 159 #define DPRINTF(x) do { if (wpi_debug > 0) printf x; } while (0) 160 #define DPRINTFN(n, x) do { if (wpi_debug >= (n)) printf x; } while (0) 161 int wpi_debug = 1; 162 #else 163 #define DPRINTF(x) 164 #define DPRINTFN(n, x) 165 #endif 166 167 CFATTACH_DECL_NEW(wpi, sizeof (struct wpi_softc), wpi_match, wpi_attach, 168 wpi_detach, NULL); 169 170 static int 171 wpi_match(device_t parent, cfdata_t match __unused, void *aux) 172 { 173 struct pci_attach_args *pa = aux; 174 175 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL) 176 return 0; 177 178 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PRO_WL_3945ABG_1 || 179 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PRO_WL_3945ABG_2) 180 return 1; 181 182 return 0; 183 } 184 185 /* Base Address Register */ 186 #define WPI_PCI_BAR0 0x10 187 188 static int 189 wpi_attach_once(void) 190 { 191 192 mutex_init(&wpi_firmware_mutex, MUTEX_DEFAULT, IPL_NONE); 193 return 0; 194 } 195 196 static void 197 wpi_attach(device_t parent __unused, device_t self, void *aux) 198 { 199 struct wpi_softc *sc = device_private(self); 200 struct ieee80211com *ic = &sc->sc_ic; 201 struct ifnet *ifp = &sc->sc_ec.ec_if; 202 struct pci_attach_args *pa = aux; 203 const char *intrstr; 204 bus_space_tag_t memt; 205 bus_space_handle_t memh; 206 pci_intr_handle_t ih; 207 pcireg_t data; 208 int ac, error; 209 char intrbuf[PCI_INTRSTR_LEN]; 210 211 RUN_ONCE(&wpi_firmware_init, wpi_attach_once); 212 sc->fw_used = false; 213 214 sc->sc_dev = self; 215 sc->sc_pct = pa->pa_pc; 216 sc->sc_pcitag = pa->pa_tag; 217 218 callout_init(&sc->calib_to, 0); 219 callout_setfunc(&sc->calib_to, wpi_calib_timeout, sc); 220 221 pci_aprint_devinfo(pa, NULL); 222 223 /* enable bus-mastering */ 224 data = pci_conf_read(sc->sc_pct, sc->sc_pcitag, PCI_COMMAND_STATUS_REG); 225 data |= PCI_COMMAND_MASTER_ENABLE; 226 pci_conf_write(sc->sc_pct, sc->sc_pcitag, PCI_COMMAND_STATUS_REG, data); 227 228 /* map the register window */ 229 error = pci_mapreg_map(pa, WPI_PCI_BAR0, PCI_MAPREG_TYPE_MEM | 230 PCI_MAPREG_MEM_TYPE_32BIT, 0, &memt, &memh, NULL, &sc->sc_sz); 231 if (error != 0) { 232 aprint_error_dev(self, "could not map memory space\n"); 233 return; 234 } 235 236 sc->sc_st = memt; 237 sc->sc_sh = memh; 238 sc->sc_dmat = pa->pa_dmat; 239 240 if (pci_intr_map(pa, &ih) != 0) { 241 aprint_error_dev(self, "could not map interrupt\n"); 242 return; 243 } 244 245 intrstr = pci_intr_string(sc->sc_pct, ih, intrbuf, sizeof(intrbuf)); 246 sc->sc_ih = pci_intr_establish(sc->sc_pct, ih, IPL_NET, wpi_intr, sc); 247 if (sc->sc_ih == NULL) { 248 aprint_error_dev(self, "could not establish interrupt"); 249 if (intrstr != NULL) 250 aprint_error(" at %s", intrstr); 251 aprint_error("\n"); 252 return; 253 } 254 aprint_normal_dev(self, "interrupting at %s\n", intrstr); 255 256 /* 257 * Put adapter into a known state. 258 */ 259 if ((error = wpi_reset(sc)) != 0) { 260 aprint_error_dev(self, "could not reset adapter\n"); 261 return; 262 } 263 264 /* 265 * Allocate DMA memory for firmware transfers. 266 */ 267 if ((error = wpi_alloc_fwmem(sc)) != 0) { 268 aprint_error_dev(self, "could not allocate firmware memory\n"); 269 return; 270 } 271 272 /* 273 * Allocate shared page and Tx/Rx rings. 274 */ 275 if ((error = wpi_alloc_shared(sc)) != 0) { 276 aprint_error_dev(self, "could not allocate shared area\n"); 277 goto fail1; 278 } 279 280 if ((error = wpi_alloc_rpool(sc)) != 0) { 281 aprint_error_dev(self, "could not allocate Rx buffers\n"); 282 goto fail2; 283 } 284 285 for (ac = 0; ac < 4; ac++) { 286 error = wpi_alloc_tx_ring(sc, &sc->txq[ac], WPI_TX_RING_COUNT, 287 ac); 288 if (error != 0) { 289 aprint_error_dev(self, 290 "could not allocate Tx ring %d\n", ac); 291 goto fail3; 292 } 293 } 294 295 error = wpi_alloc_tx_ring(sc, &sc->cmdq, WPI_CMD_RING_COUNT, 4); 296 if (error != 0) { 297 aprint_error_dev(self, "could not allocate command ring\n"); 298 goto fail3; 299 } 300 301 error = wpi_alloc_rx_ring(sc, &sc->rxq); 302 if (error != 0) { 303 aprint_error_dev(self, "could not allocate Rx ring\n"); 304 goto fail4; 305 } 306 307 ic->ic_ifp = ifp; 308 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 309 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 310 ic->ic_state = IEEE80211_S_INIT; 311 312 /* set device capabilities */ 313 ic->ic_caps = 314 IEEE80211_C_WPA | /* 802.11i */ 315 IEEE80211_C_MONITOR | /* monitor mode supported */ 316 IEEE80211_C_TXPMGT | /* tx power management */ 317 IEEE80211_C_SHSLOT | /* short slot time supported */ 318 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 319 IEEE80211_C_WME; /* 802.11e */ 320 321 /* read supported channels and MAC address from EEPROM */ 322 wpi_read_eeprom(sc); 323 324 /* set supported .11a, .11b and .11g rates */ 325 ic->ic_sup_rates[IEEE80211_MODE_11A] = ieee80211_std_rateset_11a; 326 ic->ic_sup_rates[IEEE80211_MODE_11B] = ieee80211_std_rateset_11b; 327 ic->ic_sup_rates[IEEE80211_MODE_11G] = ieee80211_std_rateset_11g; 328 329 /* IBSS channel undefined for now */ 330 ic->ic_ibss_chan = &ic->ic_channels[0]; 331 332 ifp->if_softc = sc; 333 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 334 ifp->if_init = wpi_init; 335 ifp->if_stop = wpi_stop; 336 ifp->if_ioctl = wpi_ioctl; 337 ifp->if_start = wpi_start; 338 ifp->if_watchdog = wpi_watchdog; 339 IFQ_SET_READY(&ifp->if_snd); 340 memcpy(ifp->if_xname, device_xname(self), IFNAMSIZ); 341 342 if_attach(ifp); 343 ieee80211_ifattach(ic); 344 /* override default methods */ 345 ic->ic_node_alloc = wpi_node_alloc; 346 ic->ic_newassoc = wpi_newassoc; 347 ic->ic_wme.wme_update = wpi_wme_update; 348 349 /* override state transition machine */ 350 sc->sc_newstate = ic->ic_newstate; 351 ic->ic_newstate = wpi_newstate; 352 ieee80211_media_init(ic, wpi_media_change, ieee80211_media_status); 353 354 sc->amrr.amrr_min_success_threshold = 1; 355 sc->amrr.amrr_max_success_threshold = 15; 356 357 wpi_sysctlattach(sc); 358 359 if (pmf_device_register(self, NULL, wpi_resume)) 360 pmf_class_network_register(self, ifp); 361 else 362 aprint_error_dev(self, "couldn't establish power handler\n"); 363 364 bpf_attach2(ifp, DLT_IEEE802_11_RADIO, 365 sizeof(struct ieee80211_frame) + IEEE80211_RADIOTAP_HDRLEN, 366 &sc->sc_drvbpf); 367 368 sc->sc_rxtap_len = sizeof sc->sc_rxtapu; 369 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 370 sc->sc_rxtap.wr_ihdr.it_present = htole32(WPI_RX_RADIOTAP_PRESENT); 371 372 sc->sc_txtap_len = sizeof sc->sc_txtapu; 373 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 374 sc->sc_txtap.wt_ihdr.it_present = htole32(WPI_TX_RADIOTAP_PRESENT); 375 376 ieee80211_announce(ic); 377 378 return; 379 380 /* free allocated memory if something failed during attachment */ 381 fail4: wpi_free_tx_ring(sc, &sc->cmdq); 382 fail3: while (--ac >= 0) 383 wpi_free_tx_ring(sc, &sc->txq[ac]); 384 wpi_free_rpool(sc); 385 fail2: wpi_free_shared(sc); 386 fail1: wpi_free_fwmem(sc); 387 } 388 389 static int 390 wpi_detach(device_t self, int flags __unused) 391 { 392 struct wpi_softc *sc = device_private(self); 393 struct ifnet *ifp = sc->sc_ic.ic_ifp; 394 int ac; 395 396 wpi_stop(ifp, 1); 397 398 if (ifp != NULL) 399 bpf_detach(ifp); 400 ieee80211_ifdetach(&sc->sc_ic); 401 if (ifp != NULL) 402 if_detach(ifp); 403 404 for (ac = 0; ac < 4; ac++) 405 wpi_free_tx_ring(sc, &sc->txq[ac]); 406 wpi_free_tx_ring(sc, &sc->cmdq); 407 wpi_free_rx_ring(sc, &sc->rxq); 408 wpi_free_rpool(sc); 409 wpi_free_shared(sc); 410 411 if (sc->sc_ih != NULL) { 412 pci_intr_disestablish(sc->sc_pct, sc->sc_ih); 413 sc->sc_ih = NULL; 414 } 415 416 bus_space_unmap(sc->sc_st, sc->sc_sh, sc->sc_sz); 417 418 if (sc->fw_used) { 419 sc->fw_used = false; 420 wpi_release_firmware(); 421 } 422 423 return 0; 424 } 425 426 static int 427 wpi_dma_contig_alloc(bus_dma_tag_t tag, struct wpi_dma_info *dma, void **kvap, 428 bus_size_t size, bus_size_t alignment, int flags) 429 { 430 int nsegs, error; 431 432 dma->tag = tag; 433 dma->size = size; 434 435 error = bus_dmamap_create(tag, size, 1, size, 0, flags, &dma->map); 436 if (error != 0) 437 goto fail; 438 439 error = bus_dmamem_alloc(tag, size, alignment, 0, &dma->seg, 1, &nsegs, 440 flags); 441 if (error != 0) 442 goto fail; 443 444 error = bus_dmamem_map(tag, &dma->seg, 1, size, &dma->vaddr, flags); 445 if (error != 0) 446 goto fail; 447 448 error = bus_dmamap_load(tag, dma->map, dma->vaddr, size, NULL, flags); 449 if (error != 0) 450 goto fail; 451 452 memset(dma->vaddr, 0, size); 453 454 dma->paddr = dma->map->dm_segs[0].ds_addr; 455 if (kvap != NULL) 456 *kvap = dma->vaddr; 457 458 return 0; 459 460 fail: wpi_dma_contig_free(dma); 461 return error; 462 } 463 464 static void 465 wpi_dma_contig_free(struct wpi_dma_info *dma) 466 { 467 if (dma->map != NULL) { 468 if (dma->vaddr != NULL) { 469 bus_dmamap_unload(dma->tag, dma->map); 470 bus_dmamem_unmap(dma->tag, dma->vaddr, dma->size); 471 bus_dmamem_free(dma->tag, &dma->seg, 1); 472 dma->vaddr = NULL; 473 } 474 bus_dmamap_destroy(dma->tag, dma->map); 475 dma->map = NULL; 476 } 477 } 478 479 /* 480 * Allocate a shared page between host and NIC. 481 */ 482 static int 483 wpi_alloc_shared(struct wpi_softc *sc) 484 { 485 int error; 486 487 /* must be aligned on a 4K-page boundary */ 488 error = wpi_dma_contig_alloc(sc->sc_dmat, &sc->shared_dma, 489 (void **)&sc->shared, sizeof (struct wpi_shared), WPI_BUF_ALIGN, 490 BUS_DMA_NOWAIT); 491 if (error != 0) 492 aprint_error_dev(sc->sc_dev, 493 "could not allocate shared area DMA memory\n"); 494 495 return error; 496 } 497 498 static void 499 wpi_free_shared(struct wpi_softc *sc) 500 { 501 wpi_dma_contig_free(&sc->shared_dma); 502 } 503 504 /* 505 * Allocate DMA-safe memory for firmware transfer. 506 */ 507 static int 508 wpi_alloc_fwmem(struct wpi_softc *sc) 509 { 510 int error; 511 512 /* allocate enough contiguous space to store text and data */ 513 error = wpi_dma_contig_alloc(sc->sc_dmat, &sc->fw_dma, NULL, 514 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 0, 515 BUS_DMA_NOWAIT); 516 517 if (error != 0) 518 aprint_error_dev(sc->sc_dev, 519 "could not allocate firmware transfer area DMA memory\n"); 520 return error; 521 } 522 523 static void 524 wpi_free_fwmem(struct wpi_softc *sc) 525 { 526 wpi_dma_contig_free(&sc->fw_dma); 527 } 528 529 static struct wpi_rbuf * 530 wpi_alloc_rbuf(struct wpi_softc *sc) 531 { 532 struct wpi_rbuf *rbuf; 533 534 mutex_enter(&sc->rxq.freelist_mtx); 535 rbuf = SLIST_FIRST(&sc->rxq.freelist); 536 if (rbuf != NULL) { 537 SLIST_REMOVE_HEAD(&sc->rxq.freelist, next); 538 sc->rxq.nb_free_entries --; 539 } 540 mutex_exit(&sc->rxq.freelist_mtx); 541 542 return rbuf; 543 } 544 545 /* 546 * This is called automatically by the network stack when the mbuf to which our 547 * Rx buffer is attached is freed. 548 */ 549 static void 550 wpi_free_rbuf(struct mbuf* m, void *buf, size_t size, void *arg) 551 { 552 struct wpi_rbuf *rbuf = arg; 553 struct wpi_softc *sc = rbuf->sc; 554 555 /* put the buffer back in the free list */ 556 557 mutex_enter(&sc->rxq.freelist_mtx); 558 SLIST_INSERT_HEAD(&sc->rxq.freelist, rbuf, next); 559 mutex_exit(&sc->rxq.freelist_mtx); 560 /* No need to protect this with a mutex, see wpi_rx_intr */ 561 sc->rxq.nb_free_entries ++; 562 563 if (__predict_true(m != NULL)) 564 pool_cache_put(mb_cache, m); 565 } 566 567 static int 568 wpi_alloc_rpool(struct wpi_softc *sc) 569 { 570 struct wpi_rx_ring *ring = &sc->rxq; 571 int i, error; 572 573 /* allocate a big chunk of DMA'able memory.. */ 574 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->buf_dma, NULL, 575 WPI_RBUF_COUNT * WPI_RBUF_SIZE, WPI_BUF_ALIGN, BUS_DMA_NOWAIT); 576 if (error != 0) { 577 aprint_normal_dev(sc->sc_dev, 578 "could not allocate Rx buffers DMA memory\n"); 579 return error; 580 } 581 582 /* ..and split it into 3KB chunks */ 583 mutex_init(&ring->freelist_mtx, MUTEX_DEFAULT, IPL_NET); 584 SLIST_INIT(&ring->freelist); 585 for (i = 0; i < WPI_RBUF_COUNT; i++) { 586 struct wpi_rbuf *rbuf = &ring->rbuf[i]; 587 588 rbuf->sc = sc; /* backpointer for callbacks */ 589 rbuf->vaddr = (char *)ring->buf_dma.vaddr + i * WPI_RBUF_SIZE; 590 rbuf->paddr = ring->buf_dma.paddr + i * WPI_RBUF_SIZE; 591 592 SLIST_INSERT_HEAD(&ring->freelist, rbuf, next); 593 } 594 595 ring->nb_free_entries = WPI_RBUF_COUNT; 596 return 0; 597 } 598 599 static void 600 wpi_free_rpool(struct wpi_softc *sc) 601 { 602 wpi_dma_contig_free(&sc->rxq.buf_dma); 603 } 604 605 static int 606 wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 607 { 608 int i, error; 609 610 ring->cur = 0; 611 612 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma, 613 (void **)&ring->desc, WPI_RX_RING_COUNT * sizeof (uint32_t), 614 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 615 if (error != 0) { 616 aprint_error_dev(sc->sc_dev, 617 "could not allocate rx ring DMA memory\n"); 618 goto fail; 619 } 620 621 /* 622 * Setup Rx buffers. 623 */ 624 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 625 struct wpi_rx_data *data = &ring->data[i]; 626 struct wpi_rbuf *rbuf; 627 628 MGETHDR(data->m, M_DONTWAIT, MT_DATA); 629 if (data->m == NULL) { 630 aprint_error_dev(sc->sc_dev, 631 "could not allocate rx mbuf\n"); 632 error = ENOMEM; 633 goto fail; 634 } 635 if ((rbuf = wpi_alloc_rbuf(sc)) == NULL) { 636 m_freem(data->m); 637 data->m = NULL; 638 aprint_error_dev(sc->sc_dev, 639 "could not allocate rx cluster\n"); 640 error = ENOMEM; 641 goto fail; 642 } 643 /* attach Rx buffer to mbuf */ 644 MEXTADD(data->m, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf, 645 rbuf); 646 data->m->m_flags |= M_EXT_RW; 647 648 ring->desc[i] = htole32(rbuf->paddr); 649 } 650 651 return 0; 652 653 fail: wpi_free_rx_ring(sc, ring); 654 return error; 655 } 656 657 static void 658 wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 659 { 660 int ntries; 661 662 wpi_mem_lock(sc); 663 664 WPI_WRITE(sc, WPI_RX_CONFIG, 0); 665 for (ntries = 0; ntries < 100; ntries++) { 666 if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE) 667 break; 668 DELAY(10); 669 } 670 #ifdef WPI_DEBUG 671 if (ntries == 100 && wpi_debug > 0) 672 aprint_error_dev(sc->sc_dev, "timeout resetting Rx ring\n"); 673 #endif 674 wpi_mem_unlock(sc); 675 676 ring->cur = 0; 677 } 678 679 static void 680 wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 681 { 682 int i; 683 684 wpi_dma_contig_free(&ring->desc_dma); 685 686 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 687 if (ring->data[i].m != NULL) 688 m_freem(ring->data[i].m); 689 } 690 } 691 692 static int 693 wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int count, 694 int qid) 695 { 696 int i, error; 697 698 ring->qid = qid; 699 ring->count = count; 700 ring->queued = 0; 701 ring->cur = 0; 702 703 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma, 704 (void **)&ring->desc, count * sizeof (struct wpi_tx_desc), 705 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 706 if (error != 0) { 707 aprint_error_dev(sc->sc_dev, 708 "could not allocate tx ring DMA memory\n"); 709 goto fail; 710 } 711 712 /* update shared page with ring's base address */ 713 sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr); 714 715 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->cmd_dma, 716 (void **)&ring->cmd, count * sizeof (struct wpi_tx_cmd), 4, 717 BUS_DMA_NOWAIT); 718 if (error != 0) { 719 aprint_error_dev(sc->sc_dev, 720 "could not allocate tx cmd DMA memory\n"); 721 goto fail; 722 } 723 724 ring->data = malloc(count * sizeof (struct wpi_tx_data), M_DEVBUF, 725 M_NOWAIT); 726 if (ring->data == NULL) { 727 aprint_error_dev(sc->sc_dev, 728 "could not allocate tx data slots\n"); 729 goto fail; 730 } 731 732 memset(ring->data, 0, count * sizeof (struct wpi_tx_data)); 733 734 for (i = 0; i < count; i++) { 735 struct wpi_tx_data *data = &ring->data[i]; 736 737 error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 738 WPI_MAX_SCATTER - 1, MCLBYTES, 0, BUS_DMA_NOWAIT, 739 &data->map); 740 if (error != 0) { 741 aprint_error_dev(sc->sc_dev, 742 "could not create tx buf DMA map\n"); 743 goto fail; 744 } 745 } 746 747 return 0; 748 749 fail: wpi_free_tx_ring(sc, ring); 750 return error; 751 } 752 753 static void 754 wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 755 { 756 int i, ntries; 757 758 wpi_mem_lock(sc); 759 760 WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0); 761 for (ntries = 0; ntries < 100; ntries++) { 762 if (WPI_READ(sc, WPI_TX_STATUS) & WPI_TX_IDLE(ring->qid)) 763 break; 764 DELAY(10); 765 } 766 #ifdef WPI_DEBUG 767 if (ntries == 100 && wpi_debug > 0) { 768 aprint_error_dev(sc->sc_dev, "timeout resetting Tx ring %d\n", 769 ring->qid); 770 } 771 #endif 772 wpi_mem_unlock(sc); 773 774 for (i = 0; i < ring->count; i++) { 775 struct wpi_tx_data *data = &ring->data[i]; 776 777 if (data->m != NULL) { 778 bus_dmamap_unload(sc->sc_dmat, data->map); 779 m_freem(data->m); 780 data->m = NULL; 781 } 782 } 783 784 ring->queued = 0; 785 ring->cur = 0; 786 } 787 788 static void 789 wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 790 { 791 int i; 792 793 wpi_dma_contig_free(&ring->desc_dma); 794 wpi_dma_contig_free(&ring->cmd_dma); 795 796 if (ring->data != NULL) { 797 for (i = 0; i < ring->count; i++) { 798 struct wpi_tx_data *data = &ring->data[i]; 799 800 if (data->m != NULL) { 801 bus_dmamap_unload(sc->sc_dmat, data->map); 802 m_freem(data->m); 803 } 804 } 805 free(ring->data, M_DEVBUF); 806 } 807 } 808 809 /*ARGUSED*/ 810 static struct ieee80211_node * 811 wpi_node_alloc(struct ieee80211_node_table *nt __unused) 812 { 813 struct wpi_node *wn; 814 815 wn = malloc(sizeof (struct wpi_node), M_80211_NODE, M_NOWAIT | M_ZERO); 816 817 return (struct ieee80211_node *)wn; 818 } 819 820 static void 821 wpi_newassoc(struct ieee80211_node *ni, int isnew) 822 { 823 struct wpi_softc *sc = ni->ni_ic->ic_ifp->if_softc; 824 int i; 825 826 ieee80211_amrr_node_init(&sc->amrr, &((struct wpi_node *)ni)->amn); 827 828 /* set rate to some reasonable initial value */ 829 for (i = ni->ni_rates.rs_nrates - 1; 830 i > 0 && (ni->ni_rates.rs_rates[i] & IEEE80211_RATE_VAL) > 72; 831 i--); 832 ni->ni_txrate = i; 833 } 834 835 static int 836 wpi_media_change(struct ifnet *ifp) 837 { 838 int error; 839 840 error = ieee80211_media_change(ifp); 841 if (error != ENETRESET) 842 return error; 843 844 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING)) 845 wpi_init(ifp); 846 847 return 0; 848 } 849 850 static int 851 wpi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 852 { 853 struct ifnet *ifp = ic->ic_ifp; 854 struct wpi_softc *sc = ifp->if_softc; 855 struct ieee80211_node *ni; 856 int error; 857 858 callout_stop(&sc->calib_to); 859 860 switch (nstate) { 861 case IEEE80211_S_SCAN: 862 863 if (sc->is_scanning) 864 break; 865 866 sc->is_scanning = true; 867 ieee80211_node_table_reset(&ic->ic_scan); 868 ic->ic_flags |= IEEE80211_F_SCAN | IEEE80211_F_ASCAN; 869 870 /* make the link LED blink while we're scanning */ 871 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 872 873 if ((error = wpi_scan(sc, IEEE80211_CHAN_G)) != 0) { 874 aprint_error_dev(sc->sc_dev, 875 "could not initiate scan\n"); 876 ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN); 877 return error; 878 } 879 ic->ic_state = nstate; 880 return 0; 881 882 case IEEE80211_S_ASSOC: 883 if (ic->ic_state != IEEE80211_S_RUN) 884 break; 885 /* FALLTHROUGH */ 886 case IEEE80211_S_AUTH: 887 /* reset state to handle reassociations correctly */ 888 sc->config.associd = 0; 889 sc->config.filter &= ~htole32(WPI_FILTER_BSS); 890 891 if ((error = wpi_auth(sc)) != 0) { 892 aprint_error_dev(sc->sc_dev, 893 "could not send authentication request\n"); 894 return error; 895 } 896 break; 897 898 case IEEE80211_S_RUN: 899 if (ic->ic_opmode == IEEE80211_M_MONITOR) { 900 /* link LED blinks while monitoring */ 901 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 902 break; 903 } 904 ni = ic->ic_bss; 905 906 if (ic->ic_opmode != IEEE80211_M_STA) { 907 (void) wpi_auth(sc); /* XXX */ 908 wpi_setup_beacon(sc, ni); 909 } 910 911 wpi_enable_tsf(sc, ni); 912 913 /* update adapter's configuration */ 914 sc->config.associd = htole16(ni->ni_associd & ~0xc000); 915 /* short preamble/slot time are negotiated when associating */ 916 sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE | 917 WPI_CONFIG_SHSLOT); 918 if (ic->ic_flags & IEEE80211_F_SHSLOT) 919 sc->config.flags |= htole32(WPI_CONFIG_SHSLOT); 920 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 921 sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE); 922 sc->config.filter |= htole32(WPI_FILTER_BSS); 923 if (ic->ic_opmode != IEEE80211_M_STA) 924 sc->config.filter |= htole32(WPI_FILTER_BEACON); 925 926 /* XXX put somewhere HC_QOS_SUPPORT_ASSOC + HC_IBSS_START */ 927 928 DPRINTF(("config chan %d flags %x\n", sc->config.chan, 929 sc->config.flags)); 930 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 931 sizeof (struct wpi_config), 1); 932 if (error != 0) { 933 aprint_error_dev(sc->sc_dev, 934 "could not update configuration\n"); 935 return error; 936 } 937 938 /* configuration has changed, set Tx power accordingly */ 939 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { 940 aprint_error_dev(sc->sc_dev, 941 "could not set Tx power\n"); 942 return error; 943 } 944 945 if (ic->ic_opmode == IEEE80211_M_STA) { 946 /* fake a join to init the tx rate */ 947 wpi_newassoc(ni, 1); 948 } 949 950 /* start periodic calibration timer */ 951 sc->calib_cnt = 0; 952 callout_schedule(&sc->calib_to, hz/2); 953 954 /* link LED always on while associated */ 955 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 956 break; 957 958 case IEEE80211_S_INIT: 959 sc->is_scanning = false; 960 break; 961 } 962 963 return sc->sc_newstate(ic, nstate, arg); 964 } 965 966 /* 967 * XXX: Hack to set the current channel to the value advertised in beacons or 968 * probe responses. Only used during AP detection. 969 * XXX: Duplicated from if_iwi.c 970 */ 971 static void 972 wpi_fix_channel(struct ieee80211com *ic, struct mbuf *m) 973 { 974 struct ieee80211_frame *wh; 975 uint8_t subtype; 976 uint8_t *frm, *efrm; 977 978 wh = mtod(m, struct ieee80211_frame *); 979 980 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_MGT) 981 return; 982 983 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 984 985 if (subtype != IEEE80211_FC0_SUBTYPE_BEACON && 986 subtype != IEEE80211_FC0_SUBTYPE_PROBE_RESP) 987 return; 988 989 frm = (uint8_t *)(wh + 1); 990 efrm = mtod(m, uint8_t *) + m->m_len; 991 992 frm += 12; /* skip tstamp, bintval and capinfo fields */ 993 while (frm < efrm) { 994 if (*frm == IEEE80211_ELEMID_DSPARMS) 995 #if IEEE80211_CHAN_MAX < 255 996 if (frm[2] <= IEEE80211_CHAN_MAX) 997 #endif 998 ic->ic_curchan = &ic->ic_channels[frm[2]]; 999 1000 frm += frm[1] + 2; 1001 } 1002 } 1003 1004 /* 1005 * Grab exclusive access to NIC memory. 1006 */ 1007 static void 1008 wpi_mem_lock(struct wpi_softc *sc) 1009 { 1010 uint32_t tmp; 1011 int ntries; 1012 1013 tmp = WPI_READ(sc, WPI_GPIO_CTL); 1014 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC); 1015 1016 /* spin until we actually get the lock */ 1017 for (ntries = 0; ntries < 1000; ntries++) { 1018 if ((WPI_READ(sc, WPI_GPIO_CTL) & 1019 (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK) 1020 break; 1021 DELAY(10); 1022 } 1023 if (ntries == 1000) 1024 aprint_error_dev(sc->sc_dev, "could not lock memory\n"); 1025 } 1026 1027 /* 1028 * Release lock on NIC memory. 1029 */ 1030 static void 1031 wpi_mem_unlock(struct wpi_softc *sc) 1032 { 1033 uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL); 1034 WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC); 1035 } 1036 1037 static uint32_t 1038 wpi_mem_read(struct wpi_softc *sc, uint16_t addr) 1039 { 1040 WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr); 1041 return WPI_READ(sc, WPI_READ_MEM_DATA); 1042 } 1043 1044 static void 1045 wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data) 1046 { 1047 WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr); 1048 WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data); 1049 } 1050 1051 static void 1052 wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr, 1053 const uint32_t *data, int wlen) 1054 { 1055 for (; wlen > 0; wlen--, data++, addr += 4) 1056 wpi_mem_write(sc, addr, *data); 1057 } 1058 1059 /* 1060 * Read `len' bytes from the EEPROM. We access the EEPROM through the MAC 1061 * instead of using the traditional bit-bang method. 1062 */ 1063 static int 1064 wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len) 1065 { 1066 uint8_t *out = data; 1067 uint32_t val; 1068 int ntries; 1069 1070 wpi_mem_lock(sc); 1071 for (; len > 0; len -= 2, addr++) { 1072 WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2); 1073 1074 for (ntries = 0; ntries < 10; ntries++) { 1075 if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) & 1076 WPI_EEPROM_READY) 1077 break; 1078 DELAY(5); 1079 } 1080 if (ntries == 10) { 1081 aprint_error_dev(sc->sc_dev, "could not read EEPROM\n"); 1082 return ETIMEDOUT; 1083 } 1084 *out++ = val >> 16; 1085 if (len > 1) 1086 *out++ = val >> 24; 1087 } 1088 wpi_mem_unlock(sc); 1089 1090 return 0; 1091 } 1092 1093 /* 1094 * The firmware boot code is small and is intended to be copied directly into 1095 * the NIC internal memory. 1096 */ 1097 int 1098 wpi_load_microcode(struct wpi_softc *sc, const uint8_t *ucode, int size) 1099 { 1100 int ntries; 1101 1102 size /= sizeof (uint32_t); 1103 1104 wpi_mem_lock(sc); 1105 1106 /* copy microcode image into NIC memory */ 1107 wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE, 1108 (const uint32_t *)ucode, size); 1109 1110 wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0); 1111 wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT); 1112 wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size); 1113 1114 /* run microcode */ 1115 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN); 1116 1117 /* wait for transfer to complete */ 1118 for (ntries = 0; ntries < 1000; ntries++) { 1119 if (!(wpi_mem_read(sc, WPI_MEM_UCODE_CTL) & WPI_UC_RUN)) 1120 break; 1121 DELAY(10); 1122 } 1123 if (ntries == 1000) { 1124 wpi_mem_unlock(sc); 1125 aprint_error_dev(sc->sc_dev, "could not load boot firmware\n"); 1126 return ETIMEDOUT; 1127 } 1128 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE); 1129 1130 wpi_mem_unlock(sc); 1131 1132 return 0; 1133 } 1134 1135 static int 1136 wpi_cache_firmware(struct wpi_softc *sc) 1137 { 1138 const char *const fwname = wpi_firmware_name; 1139 firmware_handle_t fw; 1140 int error; 1141 1142 /* sc is used here only to report error messages. */ 1143 1144 mutex_enter(&wpi_firmware_mutex); 1145 1146 if (wpi_firmware_users == SIZE_MAX) { 1147 mutex_exit(&wpi_firmware_mutex); 1148 return ENFILE; /* Too many of something in the system... */ 1149 } 1150 if (wpi_firmware_users++) { 1151 KASSERT(wpi_firmware_image != NULL); 1152 KASSERT(wpi_firmware_size > 0); 1153 mutex_exit(&wpi_firmware_mutex); 1154 return 0; /* Already good to go. */ 1155 } 1156 1157 KASSERT(wpi_firmware_image == NULL); 1158 KASSERT(wpi_firmware_size == 0); 1159 1160 /* load firmware image from disk */ 1161 if ((error = firmware_open("if_wpi", fwname, &fw)) != 0) { 1162 aprint_error_dev(sc->sc_dev, 1163 "could not open firmware file %s: %d\n", fwname, error); 1164 goto fail0; 1165 } 1166 1167 wpi_firmware_size = firmware_get_size(fw); 1168 1169 if (wpi_firmware_size > sizeof (struct wpi_firmware_hdr) + 1170 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ + 1171 WPI_FW_INIT_TEXT_MAXSZ + WPI_FW_INIT_DATA_MAXSZ + 1172 WPI_FW_BOOT_TEXT_MAXSZ) { 1173 aprint_error_dev(sc->sc_dev, 1174 "firmware file %s too large: %zu bytes\n", 1175 fwname, wpi_firmware_size); 1176 error = EFBIG; 1177 goto fail1; 1178 } 1179 1180 if (wpi_firmware_size < sizeof (struct wpi_firmware_hdr)) { 1181 aprint_error_dev(sc->sc_dev, 1182 "firmware file %s too small: %zu bytes\n", 1183 fwname, wpi_firmware_size); 1184 error = EINVAL; 1185 goto fail1; 1186 } 1187 1188 wpi_firmware_image = firmware_malloc(wpi_firmware_size); 1189 if (wpi_firmware_image == NULL) { 1190 aprint_error_dev(sc->sc_dev, 1191 "not enough memory for firmware file %s\n", fwname); 1192 error = ENOMEM; 1193 goto fail1; 1194 } 1195 1196 error = firmware_read(fw, 0, wpi_firmware_image, wpi_firmware_size); 1197 if (error != 0) { 1198 aprint_error_dev(sc->sc_dev, 1199 "error reading firmware file %s: %d\n", fwname, error); 1200 goto fail2; 1201 } 1202 1203 /* Success! */ 1204 firmware_close(fw); 1205 mutex_exit(&wpi_firmware_mutex); 1206 return 0; 1207 1208 fail2: 1209 firmware_free(wpi_firmware_image, wpi_firmware_size); 1210 wpi_firmware_image = NULL; 1211 fail1: 1212 wpi_firmware_size = 0; 1213 firmware_close(fw); 1214 fail0: 1215 KASSERT(wpi_firmware_users == 1); 1216 wpi_firmware_users = 0; 1217 KASSERT(wpi_firmware_image == NULL); 1218 KASSERT(wpi_firmware_size == 0); 1219 1220 mutex_exit(&wpi_firmware_mutex); 1221 return error; 1222 } 1223 1224 static void 1225 wpi_release_firmware(void) 1226 { 1227 1228 mutex_enter(&wpi_firmware_mutex); 1229 1230 KASSERT(wpi_firmware_users > 0); 1231 KASSERT(wpi_firmware_image != NULL); 1232 KASSERT(wpi_firmware_size != 0); 1233 1234 if (--wpi_firmware_users == 0) { 1235 firmware_free(wpi_firmware_image, wpi_firmware_size); 1236 wpi_firmware_image = NULL; 1237 wpi_firmware_size = 0; 1238 } 1239 1240 mutex_exit(&wpi_firmware_mutex); 1241 } 1242 1243 static int 1244 wpi_load_firmware(struct wpi_softc *sc) 1245 { 1246 struct wpi_dma_info *dma = &sc->fw_dma; 1247 struct wpi_firmware_hdr hdr; 1248 const uint8_t *init_text, *init_data, *main_text, *main_data; 1249 const uint8_t *boot_text; 1250 uint32_t init_textsz, init_datasz, main_textsz, main_datasz; 1251 uint32_t boot_textsz; 1252 size_t size; 1253 int error; 1254 1255 if (!sc->fw_used) { 1256 if ((error = wpi_cache_firmware(sc)) != 0) 1257 return error; 1258 sc->fw_used = true; 1259 } 1260 1261 KASSERT(sc->fw_used); 1262 KASSERT(wpi_firmware_image != NULL); 1263 KASSERT(wpi_firmware_size > sizeof(hdr)); 1264 1265 memcpy(&hdr, wpi_firmware_image, sizeof(hdr)); 1266 1267 main_textsz = le32toh(hdr.main_textsz); 1268 main_datasz = le32toh(hdr.main_datasz); 1269 init_textsz = le32toh(hdr.init_textsz); 1270 init_datasz = le32toh(hdr.init_datasz); 1271 boot_textsz = le32toh(hdr.boot_textsz); 1272 1273 /* sanity-check firmware segments sizes */ 1274 if (main_textsz > WPI_FW_MAIN_TEXT_MAXSZ || 1275 main_datasz > WPI_FW_MAIN_DATA_MAXSZ || 1276 init_textsz > WPI_FW_INIT_TEXT_MAXSZ || 1277 init_datasz > WPI_FW_INIT_DATA_MAXSZ || 1278 boot_textsz > WPI_FW_BOOT_TEXT_MAXSZ || 1279 (boot_textsz & 3) != 0) { 1280 aprint_error_dev(sc->sc_dev, "invalid firmware header\n"); 1281 error = EINVAL; 1282 goto free_firmware; 1283 } 1284 1285 /* check that all firmware segments are present */ 1286 size = sizeof (struct wpi_firmware_hdr) + main_textsz + 1287 main_datasz + init_textsz + init_datasz + boot_textsz; 1288 if (wpi_firmware_size < size) { 1289 aprint_error_dev(sc->sc_dev, 1290 "firmware file truncated: %zu bytes, expected %zu bytes\n", 1291 wpi_firmware_size, size); 1292 error = EINVAL; 1293 goto free_firmware; 1294 } 1295 1296 /* get pointers to firmware segments */ 1297 main_text = wpi_firmware_image + sizeof (struct wpi_firmware_hdr); 1298 main_data = main_text + main_textsz; 1299 init_text = main_data + main_datasz; 1300 init_data = init_text + init_textsz; 1301 boot_text = init_data + init_datasz; 1302 1303 /* copy initialization images into pre-allocated DMA-safe memory */ 1304 memcpy(dma->vaddr, init_data, init_datasz); 1305 memcpy((char *)dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, init_text, 1306 init_textsz); 1307 1308 /* tell adapter where to find initialization images */ 1309 wpi_mem_lock(sc); 1310 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 1311 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, init_datasz); 1312 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 1313 dma->paddr + WPI_FW_INIT_DATA_MAXSZ); 1314 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, init_textsz); 1315 wpi_mem_unlock(sc); 1316 1317 /* load firmware boot code */ 1318 if ((error = wpi_load_microcode(sc, boot_text, boot_textsz)) != 0) { 1319 aprint_error_dev(sc->sc_dev, "could not load boot firmware\n"); 1320 return error; 1321 } 1322 1323 /* now press "execute" ;-) */ 1324 WPI_WRITE(sc, WPI_RESET, 0); 1325 1326 /* wait at most one second for first alive notification */ 1327 if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) { 1328 /* this isn't what was supposed to happen.. */ 1329 aprint_error_dev(sc->sc_dev, 1330 "timeout waiting for adapter to initialize\n"); 1331 } 1332 1333 /* copy runtime images into pre-allocated DMA-safe memory */ 1334 memcpy(dma->vaddr, main_data, main_datasz); 1335 memcpy((char *)dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, main_text, 1336 main_textsz); 1337 1338 /* tell adapter where to find runtime images */ 1339 wpi_mem_lock(sc); 1340 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 1341 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, main_datasz); 1342 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 1343 dma->paddr + WPI_FW_MAIN_DATA_MAXSZ); 1344 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | main_textsz); 1345 wpi_mem_unlock(sc); 1346 1347 /* wait at most one second for second alive notification */ 1348 if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) { 1349 /* this isn't what was supposed to happen.. */ 1350 aprint_error_dev(sc->sc_dev, 1351 "timeout waiting for adapter to initialize\n"); 1352 } 1353 1354 return error; 1355 1356 free_firmware: 1357 sc->fw_used = false; 1358 wpi_release_firmware(); 1359 return error; 1360 } 1361 1362 static void 1363 wpi_calib_timeout(void *arg) 1364 { 1365 struct wpi_softc *sc = arg; 1366 struct ieee80211com *ic = &sc->sc_ic; 1367 int temp, s; 1368 1369 /* automatic rate control triggered every 500ms */ 1370 if (ic->ic_fixed_rate == -1) { 1371 s = splnet(); 1372 if (ic->ic_opmode == IEEE80211_M_STA) 1373 wpi_iter_func(sc, ic->ic_bss); 1374 else 1375 ieee80211_iterate_nodes(&ic->ic_sta, wpi_iter_func, sc); 1376 splx(s); 1377 } 1378 1379 /* update sensor data */ 1380 temp = (int)WPI_READ(sc, WPI_TEMPERATURE); 1381 1382 /* automatic power calibration every 60s */ 1383 if (++sc->calib_cnt >= 120) { 1384 wpi_power_calibration(sc, temp); 1385 sc->calib_cnt = 0; 1386 } 1387 1388 callout_schedule(&sc->calib_to, hz/2); 1389 } 1390 1391 static void 1392 wpi_iter_func(void *arg, struct ieee80211_node *ni) 1393 { 1394 struct wpi_softc *sc = arg; 1395 struct wpi_node *wn = (struct wpi_node *)ni; 1396 1397 ieee80211_amrr_choose(&sc->amrr, ni, &wn->amn); 1398 } 1399 1400 /* 1401 * This function is called periodically (every 60 seconds) to adjust output 1402 * power to temperature changes. 1403 */ 1404 void 1405 wpi_power_calibration(struct wpi_softc *sc, int temp) 1406 { 1407 /* sanity-check read value */ 1408 if (temp < -260 || temp > 25) { 1409 /* this can't be correct, ignore */ 1410 DPRINTF(("out-of-range temperature reported: %d\n", temp)); 1411 return; 1412 } 1413 1414 DPRINTF(("temperature %d->%d\n", sc->temp, temp)); 1415 1416 /* adjust Tx power if need be */ 1417 if (abs(temp - sc->temp) <= 6) 1418 return; 1419 1420 sc->temp = temp; 1421 1422 if (wpi_set_txpower(sc, sc->sc_ic.ic_bss->ni_chan, 1) != 0) { 1423 /* just warn, too bad for the automatic calibration... */ 1424 aprint_error_dev(sc->sc_dev, "could not adjust Tx power\n"); 1425 } 1426 } 1427 1428 static void 1429 wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, 1430 struct wpi_rx_data *data) 1431 { 1432 struct ieee80211com *ic = &sc->sc_ic; 1433 struct ifnet *ifp = ic->ic_ifp; 1434 struct wpi_rx_ring *ring = &sc->rxq; 1435 struct wpi_rx_stat *stat; 1436 struct wpi_rx_head *head; 1437 struct wpi_rx_tail *tail; 1438 struct wpi_rbuf *rbuf; 1439 struct ieee80211_frame *wh; 1440 struct ieee80211_node *ni; 1441 struct mbuf *m, *mnew; 1442 int data_off; 1443 1444 stat = (struct wpi_rx_stat *)(desc + 1); 1445 1446 if (stat->len > WPI_STAT_MAXLEN) { 1447 aprint_error_dev(sc->sc_dev, "invalid rx statistic header\n"); 1448 ifp->if_ierrors++; 1449 return; 1450 } 1451 1452 head = (struct wpi_rx_head *)((char *)(stat + 1) + stat->len); 1453 tail = (struct wpi_rx_tail *)((char *)(head + 1) + le16toh(head->len)); 1454 1455 DPRINTFN(4, ("rx intr: idx=%d len=%d stat len=%d rssi=%d rate=%x " 1456 "chan=%d tstamp=%" PRIu64 "\n", ring->cur, le32toh(desc->len), 1457 le16toh(head->len), (int8_t)stat->rssi, head->rate, head->chan, 1458 le64toh(tail->tstamp))); 1459 1460 /* 1461 * Discard Rx frames with bad CRC early (XXX we may want to pass them 1462 * to radiotap in monitor mode). 1463 */ 1464 if ((le32toh(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) { 1465 DPRINTF(("rx tail flags error %x\n", 1466 le32toh(tail->flags))); 1467 ifp->if_ierrors++; 1468 return; 1469 } 1470 1471 /* Compute where are the useful datas */ 1472 data_off = (char*)(head + 1) - mtod(data->m, char*); 1473 1474 /* 1475 * If the number of free entry is too low 1476 * just dup the data->m socket and reuse the same rbuf entry 1477 * Note that thi test is not protected by a mutex because the 1478 * only path that causes nb_free_entries to decrease is through 1479 * this interrupt routine, which is not re-entrent. 1480 * What may not be obvious is that the safe path is if that test 1481 * evaluates as true, so nb_free_entries can grow any time. 1482 */ 1483 if (sc->rxq.nb_free_entries <= WPI_RBUF_LOW_LIMIT) { 1484 1485 /* Prepare the mbuf for the m_dup */ 1486 data->m->m_pkthdr.len = data->m->m_len = le16toh(head->len); 1487 data->m->m_data = (char*) data->m->m_data + data_off; 1488 1489 m = m_dup(data->m,0,M_COPYALL,M_DONTWAIT); 1490 1491 /* Restore the m_data pointer for future use */ 1492 data->m->m_data = (char*) data->m->m_data - data_off; 1493 1494 if (m == NULL) { 1495 ifp->if_ierrors++; 1496 return; 1497 } 1498 } else { 1499 1500 MGETHDR(mnew, M_DONTWAIT, MT_DATA); 1501 if (mnew == NULL) { 1502 ifp->if_ierrors++; 1503 return; 1504 } 1505 1506 rbuf = wpi_alloc_rbuf(sc); 1507 KASSERT(rbuf != NULL); 1508 1509 /* attach Rx buffer to mbuf */ 1510 MEXTADD(mnew, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf, 1511 rbuf); 1512 mnew->m_flags |= M_EXT_RW; 1513 1514 m = data->m; 1515 data->m = mnew; 1516 1517 /* update Rx descriptor */ 1518 ring->desc[ring->cur] = htole32(rbuf->paddr); 1519 1520 m->m_data = (char*)m->m_data + data_off; 1521 m->m_pkthdr.len = m->m_len = le16toh(head->len); 1522 } 1523 1524 /* finalize mbuf */ 1525 m->m_pkthdr.rcvif = ifp; 1526 1527 if (ic->ic_state == IEEE80211_S_SCAN) 1528 wpi_fix_channel(ic, m); 1529 1530 if (sc->sc_drvbpf != NULL) { 1531 struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap; 1532 1533 tap->wr_flags = 0; 1534 tap->wr_chan_freq = 1535 htole16(ic->ic_channels[head->chan].ic_freq); 1536 tap->wr_chan_flags = 1537 htole16(ic->ic_channels[head->chan].ic_flags); 1538 tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET); 1539 tap->wr_dbm_antnoise = (int8_t)le16toh(stat->noise); 1540 tap->wr_tsft = tail->tstamp; 1541 tap->wr_antenna = (le16toh(head->flags) >> 4) & 0xf; 1542 switch (head->rate) { 1543 /* CCK rates */ 1544 case 10: tap->wr_rate = 2; break; 1545 case 20: tap->wr_rate = 4; break; 1546 case 55: tap->wr_rate = 11; break; 1547 case 110: tap->wr_rate = 22; break; 1548 /* OFDM rates */ 1549 case 0xd: tap->wr_rate = 12; break; 1550 case 0xf: tap->wr_rate = 18; break; 1551 case 0x5: tap->wr_rate = 24; break; 1552 case 0x7: tap->wr_rate = 36; break; 1553 case 0x9: tap->wr_rate = 48; break; 1554 case 0xb: tap->wr_rate = 72; break; 1555 case 0x1: tap->wr_rate = 96; break; 1556 case 0x3: tap->wr_rate = 108; break; 1557 /* unknown rate: should not happen */ 1558 default: tap->wr_rate = 0; 1559 } 1560 if (le16toh(head->flags) & 0x4) 1561 tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; 1562 1563 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m); 1564 } 1565 1566 /* grab a reference to the source node */ 1567 wh = mtod(m, struct ieee80211_frame *); 1568 ni = ieee80211_find_rxnode(ic, (struct ieee80211_frame_min *)wh); 1569 1570 /* send the frame to the 802.11 layer */ 1571 ieee80211_input(ic, m, ni, stat->rssi, 0); 1572 1573 /* release node reference */ 1574 ieee80211_free_node(ni); 1575 } 1576 1577 static void 1578 wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1579 { 1580 struct ifnet *ifp = sc->sc_ic.ic_ifp; 1581 struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3]; 1582 struct wpi_tx_data *data = &ring->data[desc->idx]; 1583 struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1); 1584 struct wpi_node *wn = (struct wpi_node *)data->ni; 1585 1586 DPRINTFN(4, ("tx done: qid=%d idx=%d retries=%d nkill=%d rate=%x " 1587 "duration=%d status=%x\n", desc->qid, desc->idx, stat->ntries, 1588 stat->nkill, stat->rate, le32toh(stat->duration), 1589 le32toh(stat->status))); 1590 1591 /* 1592 * Update rate control statistics for the node. 1593 * XXX we should not count mgmt frames since they're always sent at 1594 * the lowest available bit-rate. 1595 */ 1596 wn->amn.amn_txcnt++; 1597 if (stat->ntries > 0) { 1598 DPRINTFN(3, ("tx intr ntries %d\n", stat->ntries)); 1599 wn->amn.amn_retrycnt++; 1600 } 1601 1602 if ((le32toh(stat->status) & 0xff) != 1) 1603 ifp->if_oerrors++; 1604 else 1605 ifp->if_opackets++; 1606 1607 bus_dmamap_unload(sc->sc_dmat, data->map); 1608 m_freem(data->m); 1609 data->m = NULL; 1610 ieee80211_free_node(data->ni); 1611 data->ni = NULL; 1612 1613 ring->queued--; 1614 1615 sc->sc_tx_timer = 0; 1616 ifp->if_flags &= ~IFF_OACTIVE; 1617 wpi_start(ifp); 1618 } 1619 1620 static void 1621 wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1622 { 1623 struct wpi_tx_ring *ring = &sc->cmdq; 1624 struct wpi_tx_data *data; 1625 1626 if ((desc->qid & 7) != 4) 1627 return; /* not a command ack */ 1628 1629 data = &ring->data[desc->idx]; 1630 1631 /* if the command was mapped in a mbuf, free it */ 1632 if (data->m != NULL) { 1633 bus_dmamap_unload(sc->sc_dmat, data->map); 1634 m_freem(data->m); 1635 data->m = NULL; 1636 } 1637 1638 wakeup(&ring->cmd[desc->idx]); 1639 } 1640 1641 static void 1642 wpi_notif_intr(struct wpi_softc *sc) 1643 { 1644 struct ieee80211com *ic = &sc->sc_ic; 1645 struct ifnet *ifp = ic->ic_ifp; 1646 uint32_t hw; 1647 1648 hw = le32toh(sc->shared->next); 1649 while (sc->rxq.cur != hw) { 1650 struct wpi_rx_data *data = &sc->rxq.data[sc->rxq.cur]; 1651 struct wpi_rx_desc *desc = mtod(data->m, struct wpi_rx_desc *); 1652 1653 DPRINTFN(4, ("rx notification qid=%x idx=%d flags=%x type=%d " 1654 "len=%d\n", desc->qid, desc->idx, desc->flags, 1655 desc->type, le32toh(desc->len))); 1656 1657 if (!(desc->qid & 0x80)) /* reply to a command */ 1658 wpi_cmd_intr(sc, desc); 1659 1660 switch (desc->type) { 1661 case WPI_RX_DONE: 1662 /* a 802.11 frame was received */ 1663 wpi_rx_intr(sc, desc, data); 1664 break; 1665 1666 case WPI_TX_DONE: 1667 /* a 802.11 frame has been transmitted */ 1668 wpi_tx_intr(sc, desc); 1669 break; 1670 1671 case WPI_UC_READY: 1672 { 1673 struct wpi_ucode_info *uc = 1674 (struct wpi_ucode_info *)(desc + 1); 1675 1676 /* the microcontroller is ready */ 1677 DPRINTF(("microcode alive notification version %x " 1678 "alive %x\n", le32toh(uc->version), 1679 le32toh(uc->valid))); 1680 1681 if (le32toh(uc->valid) != 1) { 1682 aprint_error_dev(sc->sc_dev, 1683 "microcontroller initialization failed\n"); 1684 } 1685 break; 1686 } 1687 case WPI_STATE_CHANGED: 1688 { 1689 uint32_t *status = (uint32_t *)(desc + 1); 1690 1691 /* enabled/disabled notification */ 1692 DPRINTF(("state changed to %x\n", le32toh(*status))); 1693 1694 if (le32toh(*status) & 1) { 1695 /* the radio button has to be pushed */ 1696 aprint_error_dev(sc->sc_dev, 1697 "Radio transmitter is off\n"); 1698 /* turn the interface down */ 1699 ifp->if_flags &= ~IFF_UP; 1700 wpi_stop(ifp, 1); 1701 return; /* no further processing */ 1702 } 1703 break; 1704 } 1705 case WPI_START_SCAN: 1706 { 1707 struct wpi_start_scan *scan = 1708 (struct wpi_start_scan *)(desc + 1); 1709 1710 DPRINTFN(2, ("scanning channel %d status %x\n", 1711 scan->chan, le32toh(scan->status))); 1712 1713 /* fix current channel */ 1714 ic->ic_bss->ni_chan = &ic->ic_channels[scan->chan]; 1715 break; 1716 } 1717 case WPI_STOP_SCAN: 1718 { 1719 struct wpi_stop_scan *scan = 1720 (struct wpi_stop_scan *)(desc + 1); 1721 1722 DPRINTF(("scan finished nchan=%d status=%d chan=%d\n", 1723 scan->nchan, scan->status, scan->chan)); 1724 1725 if (scan->status == 1 && scan->chan <= 14) { 1726 /* 1727 * We just finished scanning 802.11g channels, 1728 * start scanning 802.11a ones. 1729 */ 1730 if (wpi_scan(sc, IEEE80211_CHAN_A) == 0) 1731 break; 1732 } 1733 sc->is_scanning = false; 1734 ieee80211_end_scan(ic); 1735 break; 1736 } 1737 } 1738 1739 sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT; 1740 } 1741 1742 /* tell the firmware what we have processed */ 1743 hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1; 1744 WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7); 1745 } 1746 1747 static int 1748 wpi_intr(void *arg) 1749 { 1750 struct wpi_softc *sc = arg; 1751 struct ifnet *ifp = sc->sc_ic.ic_ifp; 1752 uint32_t r; 1753 1754 r = WPI_READ(sc, WPI_INTR); 1755 if (r == 0 || r == 0xffffffff) 1756 return 0; /* not for us */ 1757 1758 DPRINTFN(6, ("interrupt reg %x\n", r)); 1759 1760 /* disable interrupts */ 1761 WPI_WRITE(sc, WPI_MASK, 0); 1762 /* ack interrupts */ 1763 WPI_WRITE(sc, WPI_INTR, r); 1764 1765 if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) { 1766 /* SYSTEM FAILURE, SYSTEM FAILURE */ 1767 aprint_error_dev(sc->sc_dev, "fatal firmware error\n"); 1768 ifp->if_flags &= ~IFF_UP; 1769 wpi_stop(ifp, 1); 1770 return 1; 1771 } 1772 1773 if (r & WPI_RX_INTR) 1774 wpi_notif_intr(sc); 1775 1776 if (r & WPI_ALIVE_INTR) /* firmware initialized */ 1777 wakeup(sc); 1778 1779 /* re-enable interrupts */ 1780 if (ifp->if_flags & IFF_UP) 1781 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 1782 1783 return 1; 1784 } 1785 1786 static uint8_t 1787 wpi_plcp_signal(int rate) 1788 { 1789 switch (rate) { 1790 /* CCK rates (returned values are device-dependent) */ 1791 case 2: return 10; 1792 case 4: return 20; 1793 case 11: return 55; 1794 case 22: return 110; 1795 1796 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1797 /* R1-R4, (u)ral is R4-R1 */ 1798 case 12: return 0xd; 1799 case 18: return 0xf; 1800 case 24: return 0x5; 1801 case 36: return 0x7; 1802 case 48: return 0x9; 1803 case 72: return 0xb; 1804 case 96: return 0x1; 1805 case 108: return 0x3; 1806 1807 /* unsupported rates (should not get there) */ 1808 default: return 0; 1809 } 1810 } 1811 1812 /* quickly determine if a given rate is CCK or OFDM */ 1813 #define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1814 1815 static int 1816 wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, 1817 int ac) 1818 { 1819 struct ieee80211com *ic = &sc->sc_ic; 1820 struct wpi_tx_ring *ring = &sc->txq[ac]; 1821 struct wpi_tx_desc *desc; 1822 struct wpi_tx_data *data; 1823 struct wpi_tx_cmd *cmd; 1824 struct wpi_cmd_data *tx; 1825 struct ieee80211_frame *wh; 1826 struct ieee80211_key *k; 1827 const struct chanAccParams *cap; 1828 struct mbuf *mnew; 1829 int i, rate, error, hdrlen, noack = 0; 1830 1831 desc = &ring->desc[ring->cur]; 1832 data = &ring->data[ring->cur]; 1833 1834 wh = mtod(m0, struct ieee80211_frame *); 1835 1836 if (ieee80211_has_qos(wh)) { 1837 cap = &ic->ic_wme.wme_chanParams; 1838 noack = cap->cap_wmeParams[ac].wmep_noackPolicy; 1839 } 1840 1841 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1842 k = ieee80211_crypto_encap(ic, ni, m0); 1843 if (k == NULL) { 1844 m_freem(m0); 1845 return ENOBUFS; 1846 } 1847 1848 /* packet header may have moved, reset our local pointer */ 1849 wh = mtod(m0, struct ieee80211_frame *); 1850 } 1851 1852 hdrlen = ieee80211_anyhdrsize(wh); 1853 1854 /* pickup a rate */ 1855 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1856 IEEE80211_FC0_TYPE_MGT) { 1857 /* mgmt frames are sent at the lowest available bit-rate */ 1858 rate = ni->ni_rates.rs_rates[0]; 1859 } else { 1860 if (ic->ic_fixed_rate != -1) { 1861 rate = ic->ic_sup_rates[ic->ic_curmode]. 1862 rs_rates[ic->ic_fixed_rate]; 1863 } else 1864 rate = ni->ni_rates.rs_rates[ni->ni_txrate]; 1865 } 1866 rate &= IEEE80211_RATE_VAL; 1867 1868 if (sc->sc_drvbpf != NULL) { 1869 struct wpi_tx_radiotap_header *tap = &sc->sc_txtap; 1870 1871 tap->wt_flags = 0; 1872 tap->wt_chan_freq = htole16(ni->ni_chan->ic_freq); 1873 tap->wt_chan_flags = htole16(ni->ni_chan->ic_flags); 1874 tap->wt_rate = rate; 1875 tap->wt_hwqueue = ac; 1876 if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1877 tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1878 1879 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1880 } 1881 1882 cmd = &ring->cmd[ring->cur]; 1883 cmd->code = WPI_CMD_TX_DATA; 1884 cmd->flags = 0; 1885 cmd->qid = ring->qid; 1886 cmd->idx = ring->cur; 1887 1888 tx = (struct wpi_cmd_data *)cmd->data; 1889 /* no need to zero tx, all fields are reinitialized here */ 1890 tx->flags = 0; 1891 1892 if (!noack && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1893 tx->flags |= htole32(WPI_TX_NEED_ACK); 1894 } else if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > ic->ic_rtsthreshold) 1895 tx->flags |= htole32(WPI_TX_NEED_RTS | WPI_TX_FULL_TXOP); 1896 1897 tx->flags |= htole32(WPI_TX_AUTO_SEQ); 1898 1899 /* retrieve destination node's id */ 1900 tx->id = IEEE80211_IS_MULTICAST(wh->i_addr1) ? WPI_ID_BROADCAST : 1901 WPI_ID_BSS; 1902 1903 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1904 IEEE80211_FC0_TYPE_MGT) { 1905 /* tell h/w to set timestamp in probe responses */ 1906 if ((wh->i_fc[0] & 1907 (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) == 1908 (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP)) 1909 tx->flags |= htole32(WPI_TX_INSERT_TSTAMP); 1910 1911 if (((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1912 IEEE80211_FC0_SUBTYPE_ASSOC_REQ) || 1913 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1914 IEEE80211_FC0_SUBTYPE_REASSOC_REQ)) 1915 tx->timeout = htole16(3); 1916 else 1917 tx->timeout = htole16(2); 1918 } else 1919 tx->timeout = htole16(0); 1920 1921 tx->rate = wpi_plcp_signal(rate); 1922 1923 /* be very persistant at sending frames out */ 1924 tx->rts_ntries = 7; 1925 tx->data_ntries = 15; 1926 1927 tx->ofdm_mask = 0xff; 1928 tx->cck_mask = 0x0f; 1929 tx->lifetime = htole32(WPI_LIFETIME_INFINITE); 1930 1931 tx->len = htole16(m0->m_pkthdr.len); 1932 1933 /* save and trim IEEE802.11 header */ 1934 memcpy((uint8_t *)(tx + 1), wh, hdrlen); 1935 m_adj(m0, hdrlen); 1936 1937 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 1938 BUS_DMA_WRITE | BUS_DMA_NOWAIT); 1939 if (error != 0 && error != EFBIG) { 1940 aprint_error_dev(sc->sc_dev, "could not map mbuf (error %d)\n", 1941 error); 1942 m_freem(m0); 1943 return error; 1944 } 1945 if (error != 0) { 1946 /* too many fragments, linearize */ 1947 1948 MGETHDR(mnew, M_DONTWAIT, MT_DATA); 1949 if (mnew == NULL) { 1950 m_freem(m0); 1951 return ENOMEM; 1952 } 1953 M_COPY_PKTHDR(mnew, m0); 1954 if (m0->m_pkthdr.len > MHLEN) { 1955 MCLGET(mnew, M_DONTWAIT); 1956 if (!(mnew->m_flags & M_EXT)) { 1957 m_freem(m0); 1958 m_freem(mnew); 1959 return ENOMEM; 1960 } 1961 } 1962 1963 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(mnew, void *)); 1964 m_freem(m0); 1965 mnew->m_len = mnew->m_pkthdr.len; 1966 m0 = mnew; 1967 1968 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 1969 BUS_DMA_WRITE | BUS_DMA_NOWAIT); 1970 if (error != 0) { 1971 aprint_error_dev(sc->sc_dev, 1972 "could not map mbuf (error %d)\n", error); 1973 m_freem(m0); 1974 return error; 1975 } 1976 } 1977 1978 data->m = m0; 1979 data->ni = ni; 1980 1981 DPRINTFN(4, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n", 1982 ring->qid, ring->cur, m0->m_pkthdr.len, data->map->dm_nsegs)); 1983 1984 /* first scatter/gather segment is used by the tx data command */ 1985 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 1986 (1 + data->map->dm_nsegs) << 24); 1987 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 1988 ring->cur * sizeof (struct wpi_tx_cmd)); 1989 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data) + 1990 ((hdrlen + 3) & ~3)); 1991 for (i = 1; i <= data->map->dm_nsegs; i++) { 1992 desc->segs[i].addr = 1993 htole32(data->map->dm_segs[i - 1].ds_addr); 1994 desc->segs[i].len = 1995 htole32(data->map->dm_segs[i - 1].ds_len); 1996 } 1997 1998 ring->queued++; 1999 2000 /* kick ring */ 2001 ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT; 2002 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2003 2004 return 0; 2005 } 2006 2007 static void 2008 wpi_start(struct ifnet *ifp) 2009 { 2010 struct wpi_softc *sc = ifp->if_softc; 2011 struct ieee80211com *ic = &sc->sc_ic; 2012 struct ieee80211_node *ni; 2013 struct ether_header *eh; 2014 struct mbuf *m0; 2015 int ac; 2016 2017 /* 2018 * net80211 may still try to send management frames even if the 2019 * IFF_RUNNING flag is not set... 2020 */ 2021 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 2022 return; 2023 2024 for (;;) { 2025 IF_DEQUEUE(&ic->ic_mgtq, m0); 2026 if (m0 != NULL) { 2027 2028 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 2029 m0->m_pkthdr.rcvif = NULL; 2030 2031 /* management frames go into ring 0 */ 2032 if (sc->txq[0].queued > sc->txq[0].count - 8) { 2033 ifp->if_oerrors++; 2034 continue; 2035 } 2036 bpf_mtap3(ic->ic_rawbpf, m0); 2037 if (wpi_tx_data(sc, m0, ni, 0) != 0) { 2038 ifp->if_oerrors++; 2039 break; 2040 } 2041 } else { 2042 if (ic->ic_state != IEEE80211_S_RUN) 2043 break; 2044 IFQ_POLL(&ifp->if_snd, m0); 2045 if (m0 == NULL) 2046 break; 2047 2048 if (m0->m_len < sizeof (*eh) && 2049 (m0 = m_pullup(m0, sizeof (*eh))) == NULL) { 2050 ifp->if_oerrors++; 2051 continue; 2052 } 2053 eh = mtod(m0, struct ether_header *); 2054 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 2055 if (ni == NULL) { 2056 m_freem(m0); 2057 ifp->if_oerrors++; 2058 continue; 2059 } 2060 2061 /* classify mbuf so we can find which tx ring to use */ 2062 if (ieee80211_classify(ic, m0, ni) != 0) { 2063 m_freem(m0); 2064 ieee80211_free_node(ni); 2065 ifp->if_oerrors++; 2066 continue; 2067 } 2068 2069 /* no QoS encapsulation for EAPOL frames */ 2070 ac = (eh->ether_type != htons(ETHERTYPE_PAE)) ? 2071 M_WME_GETAC(m0) : WME_AC_BE; 2072 2073 if (sc->txq[ac].queued > sc->txq[ac].count - 8) { 2074 /* there is no place left in this ring */ 2075 ifp->if_flags |= IFF_OACTIVE; 2076 break; 2077 } 2078 IFQ_DEQUEUE(&ifp->if_snd, m0); 2079 bpf_mtap(ifp, m0); 2080 m0 = ieee80211_encap(ic, m0, ni); 2081 if (m0 == NULL) { 2082 ieee80211_free_node(ni); 2083 ifp->if_oerrors++; 2084 continue; 2085 } 2086 bpf_mtap3(ic->ic_rawbpf, m0); 2087 if (wpi_tx_data(sc, m0, ni, ac) != 0) { 2088 ieee80211_free_node(ni); 2089 ifp->if_oerrors++; 2090 break; 2091 } 2092 } 2093 2094 sc->sc_tx_timer = 5; 2095 ifp->if_timer = 1; 2096 } 2097 } 2098 2099 static void 2100 wpi_watchdog(struct ifnet *ifp) 2101 { 2102 struct wpi_softc *sc = ifp->if_softc; 2103 2104 ifp->if_timer = 0; 2105 2106 if (sc->sc_tx_timer > 0) { 2107 if (--sc->sc_tx_timer == 0) { 2108 aprint_error_dev(sc->sc_dev, "device timeout\n"); 2109 ifp->if_flags &= ~IFF_UP; 2110 wpi_stop(ifp, 1); 2111 ifp->if_oerrors++; 2112 return; 2113 } 2114 ifp->if_timer = 1; 2115 } 2116 2117 ieee80211_watchdog(&sc->sc_ic); 2118 } 2119 2120 static int 2121 wpi_ioctl(struct ifnet *ifp, u_long cmd, void *data) 2122 { 2123 #define IS_RUNNING(ifp) \ 2124 ((ifp->if_flags & IFF_UP) && (ifp->if_flags & IFF_RUNNING)) 2125 2126 struct wpi_softc *sc = ifp->if_softc; 2127 struct ieee80211com *ic = &sc->sc_ic; 2128 int s, error = 0; 2129 2130 s = splnet(); 2131 2132 switch (cmd) { 2133 case SIOCSIFFLAGS: 2134 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 2135 break; 2136 if (ifp->if_flags & IFF_UP) { 2137 if (!(ifp->if_flags & IFF_RUNNING)) 2138 wpi_init(ifp); 2139 } else { 2140 if (ifp->if_flags & IFF_RUNNING) 2141 wpi_stop(ifp, 1); 2142 } 2143 break; 2144 2145 case SIOCADDMULTI: 2146 case SIOCDELMULTI: 2147 /* XXX no h/w multicast filter? --dyoung */ 2148 if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) { 2149 /* setup multicast filter, etc */ 2150 error = 0; 2151 } 2152 break; 2153 2154 default: 2155 error = ieee80211_ioctl(ic, cmd, data); 2156 } 2157 2158 if (error == ENETRESET) { 2159 if (IS_RUNNING(ifp) && 2160 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2161 wpi_init(ifp); 2162 error = 0; 2163 } 2164 2165 splx(s); 2166 return error; 2167 2168 #undef IS_RUNNING 2169 } 2170 2171 /* 2172 * Extract various information from EEPROM. 2173 */ 2174 static void 2175 wpi_read_eeprom(struct wpi_softc *sc) 2176 { 2177 struct ieee80211com *ic = &sc->sc_ic; 2178 char domain[4]; 2179 int i; 2180 2181 wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap, 1); 2182 wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev, 2); 2183 wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1); 2184 2185 DPRINTF(("cap=%x rev=%x type=%x\n", sc->cap, le16toh(sc->rev), 2186 sc->type)); 2187 2188 /* read and print regulatory domain */ 2189 wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, domain, 4); 2190 aprint_normal_dev(sc->sc_dev, "%.4s", domain); 2191 2192 /* read and print MAC address */ 2193 wpi_read_prom_data(sc, WPI_EEPROM_MAC, ic->ic_myaddr, 6); 2194 aprint_normal(", address %s\n", ether_sprintf(ic->ic_myaddr)); 2195 2196 /* read the list of authorized channels */ 2197 for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++) 2198 wpi_read_eeprom_channels(sc, i); 2199 2200 /* read the list of power groups */ 2201 for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++) 2202 wpi_read_eeprom_group(sc, i); 2203 } 2204 2205 static void 2206 wpi_read_eeprom_channels(struct wpi_softc *sc, int n) 2207 { 2208 struct ieee80211com *ic = &sc->sc_ic; 2209 const struct wpi_chan_band *band = &wpi_bands[n]; 2210 struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND]; 2211 int chan, i; 2212 2213 wpi_read_prom_data(sc, band->addr, channels, 2214 band->nchan * sizeof (struct wpi_eeprom_chan)); 2215 2216 for (i = 0; i < band->nchan; i++) { 2217 if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID)) 2218 continue; 2219 2220 chan = band->chan[i]; 2221 2222 if (n == 0) { /* 2GHz band */ 2223 ic->ic_channels[chan].ic_freq = 2224 ieee80211_ieee2mhz(chan, IEEE80211_CHAN_2GHZ); 2225 ic->ic_channels[chan].ic_flags = 2226 IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | 2227 IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; 2228 2229 } else { /* 5GHz band */ 2230 /* 2231 * Some 3945ABG adapters support channels 7, 8, 11 2232 * and 12 in the 2GHz *and* 5GHz bands. 2233 * Because of limitations in our net80211(9) stack, 2234 * we can't support these channels in 5GHz band. 2235 */ 2236 if (chan <= 14) 2237 continue; 2238 2239 ic->ic_channels[chan].ic_freq = 2240 ieee80211_ieee2mhz(chan, IEEE80211_CHAN_5GHZ); 2241 ic->ic_channels[chan].ic_flags = IEEE80211_CHAN_A; 2242 } 2243 2244 /* is active scan allowed on this channel? */ 2245 if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) { 2246 ic->ic_channels[chan].ic_flags |= 2247 IEEE80211_CHAN_PASSIVE; 2248 } 2249 2250 /* save maximum allowed power for this channel */ 2251 sc->maxpwr[chan] = channels[i].maxpwr; 2252 2253 DPRINTF(("adding chan %d flags=0x%x maxpwr=%d\n", 2254 chan, channels[i].flags, sc->maxpwr[chan])); 2255 } 2256 } 2257 2258 static void 2259 wpi_read_eeprom_group(struct wpi_softc *sc, int n) 2260 { 2261 struct wpi_power_group *group = &sc->groups[n]; 2262 struct wpi_eeprom_group rgroup; 2263 int i; 2264 2265 wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup, 2266 sizeof rgroup); 2267 2268 /* save power group information */ 2269 group->chan = rgroup.chan; 2270 group->maxpwr = rgroup.maxpwr; 2271 /* temperature at which the samples were taken */ 2272 group->temp = (int16_t)le16toh(rgroup.temp); 2273 2274 DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n, 2275 group->chan, group->maxpwr, group->temp)); 2276 2277 for (i = 0; i < WPI_SAMPLES_COUNT; i++) { 2278 group->samples[i].index = rgroup.samples[i].index; 2279 group->samples[i].power = rgroup.samples[i].power; 2280 2281 DPRINTF(("\tsample %d: index=%d power=%d\n", i, 2282 group->samples[i].index, group->samples[i].power)); 2283 } 2284 } 2285 2286 /* 2287 * Send a command to the firmware. 2288 */ 2289 static int 2290 wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async) 2291 { 2292 struct wpi_tx_ring *ring = &sc->cmdq; 2293 struct wpi_tx_desc *desc; 2294 struct wpi_tx_cmd *cmd; 2295 2296 KASSERT(size <= sizeof cmd->data); 2297 2298 desc = &ring->desc[ring->cur]; 2299 cmd = &ring->cmd[ring->cur]; 2300 2301 cmd->code = code; 2302 cmd->flags = 0; 2303 cmd->qid = ring->qid; 2304 cmd->idx = ring->cur; 2305 memcpy(cmd->data, buf, size); 2306 2307 desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24); 2308 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2309 ring->cur * sizeof (struct wpi_tx_cmd)); 2310 desc->segs[0].len = htole32(4 + size); 2311 2312 /* kick cmd ring */ 2313 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2314 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2315 2316 return async ? 0 : tsleep(cmd, PCATCH, "wpicmd", hz); 2317 } 2318 2319 static int 2320 wpi_wme_update(struct ieee80211com *ic) 2321 { 2322 #define WPI_EXP2(v) htole16((1 << (v)) - 1) 2323 #define WPI_USEC(v) htole16(IEEE80211_TXOP_TO_US(v)) 2324 struct wpi_softc *sc = ic->ic_ifp->if_softc; 2325 const struct wmeParams *wmep; 2326 struct wpi_wme_setup wme; 2327 int ac; 2328 2329 /* don't override default WME values if WME is not actually enabled */ 2330 if (!(ic->ic_flags & IEEE80211_F_WME)) 2331 return 0; 2332 2333 wme.flags = 0; 2334 for (ac = 0; ac < WME_NUM_AC; ac++) { 2335 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 2336 wme.ac[ac].aifsn = wmep->wmep_aifsn; 2337 wme.ac[ac].cwmin = WPI_EXP2(wmep->wmep_logcwmin); 2338 wme.ac[ac].cwmax = WPI_EXP2(wmep->wmep_logcwmax); 2339 wme.ac[ac].txop = WPI_USEC(wmep->wmep_txopLimit); 2340 2341 DPRINTF(("setting WME for queue %d aifsn=%d cwmin=%d cwmax=%d " 2342 "txop=%d\n", ac, wme.ac[ac].aifsn, wme.ac[ac].cwmin, 2343 wme.ac[ac].cwmax, wme.ac[ac].txop)); 2344 } 2345 2346 return wpi_cmd(sc, WPI_CMD_SET_WME, &wme, sizeof wme, 1); 2347 #undef WPI_USEC 2348 #undef WPI_EXP2 2349 } 2350 2351 /* 2352 * Configure h/w multi-rate retries. 2353 */ 2354 static int 2355 wpi_mrr_setup(struct wpi_softc *sc) 2356 { 2357 struct ieee80211com *ic = &sc->sc_ic; 2358 struct wpi_mrr_setup mrr; 2359 int i, error; 2360 2361 /* CCK rates (not used with 802.11a) */ 2362 for (i = WPI_CCK1; i <= WPI_CCK11; i++) { 2363 mrr.rates[i].flags = 0; 2364 mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; 2365 /* fallback to the immediate lower CCK rate (if any) */ 2366 mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1; 2367 /* try one time at this rate before falling back to "next" */ 2368 mrr.rates[i].ntries = 1; 2369 } 2370 2371 /* OFDM rates (not used with 802.11b) */ 2372 for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) { 2373 mrr.rates[i].flags = 0; 2374 mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; 2375 /* fallback to the immediate lower rate (if any) */ 2376 /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */ 2377 mrr.rates[i].next = (i == WPI_OFDM6) ? 2378 ((ic->ic_curmode == IEEE80211_MODE_11A) ? 2379 WPI_OFDM6 : WPI_CCK2) : 2380 i - 1; 2381 /* try one time at this rate before falling back to "next" */ 2382 mrr.rates[i].ntries = 1; 2383 } 2384 2385 /* setup MRR for control frames */ 2386 mrr.which = htole32(WPI_MRR_CTL); 2387 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2388 if (error != 0) { 2389 aprint_error_dev(sc->sc_dev, 2390 "could not setup MRR for control frames\n"); 2391 return error; 2392 } 2393 2394 /* setup MRR for data frames */ 2395 mrr.which = htole32(WPI_MRR_DATA); 2396 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2397 if (error != 0) { 2398 aprint_error_dev(sc->sc_dev, 2399 "could not setup MRR for data frames\n"); 2400 return error; 2401 } 2402 2403 return 0; 2404 } 2405 2406 static void 2407 wpi_set_led(struct wpi_softc *sc, uint8_t which, uint8_t off, uint8_t on) 2408 { 2409 struct wpi_cmd_led led; 2410 2411 led.which = which; 2412 led.unit = htole32(100000); /* on/off in unit of 100ms */ 2413 led.off = off; 2414 led.on = on; 2415 2416 (void)wpi_cmd(sc, WPI_CMD_SET_LED, &led, sizeof led, 1); 2417 } 2418 2419 static void 2420 wpi_enable_tsf(struct wpi_softc *sc, struct ieee80211_node *ni) 2421 { 2422 struct wpi_cmd_tsf tsf; 2423 uint64_t val, mod; 2424 2425 memset(&tsf, 0, sizeof tsf); 2426 memcpy(&tsf.tstamp, ni->ni_tstamp.data, sizeof (uint64_t)); 2427 tsf.bintval = htole16(ni->ni_intval); 2428 tsf.lintval = htole16(10); 2429 2430 /* compute remaining time until next beacon */ 2431 val = (uint64_t)ni->ni_intval * 1024; /* msecs -> usecs */ 2432 mod = le64toh(tsf.tstamp) % val; 2433 tsf.binitval = htole32((uint32_t)(val - mod)); 2434 2435 DPRINTF(("TSF bintval=%u tstamp=%" PRIu64 ", init=%u\n", 2436 ni->ni_intval, le64toh(tsf.tstamp), (uint32_t)(val - mod))); 2437 2438 if (wpi_cmd(sc, WPI_CMD_TSF, &tsf, sizeof tsf, 1) != 0) 2439 aprint_error_dev(sc->sc_dev, "could not enable TSF\n"); 2440 } 2441 2442 /* 2443 * Update Tx power to match what is defined for channel `c'. 2444 */ 2445 static int 2446 wpi_set_txpower(struct wpi_softc *sc, struct ieee80211_channel *c, int async) 2447 { 2448 struct ieee80211com *ic = &sc->sc_ic; 2449 struct wpi_power_group *group; 2450 struct wpi_cmd_txpower txpower; 2451 u_int chan; 2452 int i; 2453 2454 /* get channel number */ 2455 chan = ieee80211_chan2ieee(ic, c); 2456 2457 /* find the power group to which this channel belongs */ 2458 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2459 for (group = &sc->groups[1]; group < &sc->groups[4]; group++) 2460 if (chan <= group->chan) 2461 break; 2462 } else 2463 group = &sc->groups[0]; 2464 2465 memset(&txpower, 0, sizeof txpower); 2466 txpower.band = IEEE80211_IS_CHAN_5GHZ(c) ? 0 : 1; 2467 txpower.chan = htole16(chan); 2468 2469 /* set Tx power for all OFDM and CCK rates */ 2470 for (i = 0; i <= 11 ; i++) { 2471 /* retrieve Tx power for this channel/rate combination */ 2472 int idx = wpi_get_power_index(sc, group, c, 2473 wpi_ridx_to_rate[i]); 2474 2475 txpower.rates[i].plcp = wpi_ridx_to_plcp[i]; 2476 2477 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2478 txpower.rates[i].rf_gain = wpi_rf_gain_5ghz[idx]; 2479 txpower.rates[i].dsp_gain = wpi_dsp_gain_5ghz[idx]; 2480 } else { 2481 txpower.rates[i].rf_gain = wpi_rf_gain_2ghz[idx]; 2482 txpower.rates[i].dsp_gain = wpi_dsp_gain_2ghz[idx]; 2483 } 2484 DPRINTF(("chan %d/rate %d: power index %d\n", chan, 2485 wpi_ridx_to_rate[i], idx)); 2486 } 2487 2488 return wpi_cmd(sc, WPI_CMD_TXPOWER, &txpower, sizeof txpower, async); 2489 } 2490 2491 /* 2492 * Determine Tx power index for a given channel/rate combination. 2493 * This takes into account the regulatory information from EEPROM and the 2494 * current temperature. 2495 */ 2496 static int 2497 wpi_get_power_index(struct wpi_softc *sc, struct wpi_power_group *group, 2498 struct ieee80211_channel *c, int rate) 2499 { 2500 /* fixed-point arithmetic division using a n-bit fractional part */ 2501 #define fdivround(a, b, n) \ 2502 ((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n)) 2503 2504 /* linear interpolation */ 2505 #define interpolate(x, x1, y1, x2, y2, n) \ 2506 ((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n)) 2507 2508 struct ieee80211com *ic = &sc->sc_ic; 2509 struct wpi_power_sample *sample; 2510 int pwr, idx; 2511 u_int chan; 2512 2513 /* get channel number */ 2514 chan = ieee80211_chan2ieee(ic, c); 2515 2516 /* default power is group's maximum power - 3dB */ 2517 pwr = group->maxpwr / 2; 2518 2519 /* decrease power for highest OFDM rates to reduce distortion */ 2520 switch (rate) { 2521 case 72: /* 36Mb/s */ 2522 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 0 : 5; 2523 break; 2524 case 96: /* 48Mb/s */ 2525 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 7 : 10; 2526 break; 2527 case 108: /* 54Mb/s */ 2528 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 9 : 12; 2529 break; 2530 } 2531 2532 /* never exceed channel's maximum allowed Tx power */ 2533 pwr = min(pwr, sc->maxpwr[chan]); 2534 2535 /* retrieve power index into gain tables from samples */ 2536 for (sample = group->samples; sample < &group->samples[3]; sample++) 2537 if (pwr > sample[1].power) 2538 break; 2539 /* fixed-point linear interpolation using a 19-bit fractional part */ 2540 idx = interpolate(pwr, sample[0].power, sample[0].index, 2541 sample[1].power, sample[1].index, 19); 2542 2543 /*- 2544 * Adjust power index based on current temperature: 2545 * - if cooler than factory-calibrated: decrease output power 2546 * - if warmer than factory-calibrated: increase output power 2547 */ 2548 idx -= (sc->temp - group->temp) * 11 / 100; 2549 2550 /* decrease power for CCK rates (-5dB) */ 2551 if (!WPI_RATE_IS_OFDM(rate)) 2552 idx += 10; 2553 2554 /* keep power index in a valid range */ 2555 if (idx < 0) 2556 return 0; 2557 if (idx > WPI_MAX_PWR_INDEX) 2558 return WPI_MAX_PWR_INDEX; 2559 return idx; 2560 2561 #undef interpolate 2562 #undef fdivround 2563 } 2564 2565 /* 2566 * Build a beacon frame that the firmware will broadcast periodically in 2567 * IBSS or HostAP modes. 2568 */ 2569 static int 2570 wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni) 2571 { 2572 struct ieee80211com *ic = &sc->sc_ic; 2573 struct wpi_tx_ring *ring = &sc->cmdq; 2574 struct wpi_tx_desc *desc; 2575 struct wpi_tx_data *data; 2576 struct wpi_tx_cmd *cmd; 2577 struct wpi_cmd_beacon *bcn; 2578 struct ieee80211_beacon_offsets bo; 2579 struct mbuf *m0; 2580 int error; 2581 2582 desc = &ring->desc[ring->cur]; 2583 data = &ring->data[ring->cur]; 2584 2585 m0 = ieee80211_beacon_alloc(ic, ni, &bo); 2586 if (m0 == NULL) { 2587 aprint_error_dev(sc->sc_dev, 2588 "could not allocate beacon frame\n"); 2589 return ENOMEM; 2590 } 2591 2592 cmd = &ring->cmd[ring->cur]; 2593 cmd->code = WPI_CMD_SET_BEACON; 2594 cmd->flags = 0; 2595 cmd->qid = ring->qid; 2596 cmd->idx = ring->cur; 2597 2598 bcn = (struct wpi_cmd_beacon *)cmd->data; 2599 memset(bcn, 0, sizeof (struct wpi_cmd_beacon)); 2600 bcn->id = WPI_ID_BROADCAST; 2601 bcn->ofdm_mask = 0xff; 2602 bcn->cck_mask = 0x0f; 2603 bcn->lifetime = htole32(WPI_LIFETIME_INFINITE); 2604 bcn->len = htole16(m0->m_pkthdr.len); 2605 bcn->rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2606 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2607 bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP); 2608 2609 /* save and trim IEEE802.11 header */ 2610 m_copydata(m0, 0, sizeof (struct ieee80211_frame), (void *)&bcn->wh); 2611 m_adj(m0, sizeof (struct ieee80211_frame)); 2612 2613 /* assume beacon frame is contiguous */ 2614 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 2615 BUS_DMA_READ | BUS_DMA_NOWAIT); 2616 if (error != 0) { 2617 aprint_error_dev(sc->sc_dev, "could not map beacon\n"); 2618 m_freem(m0); 2619 return error; 2620 } 2621 2622 data->m = m0; 2623 2624 /* first scatter/gather segment is used by the beacon command */ 2625 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24); 2626 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2627 ring->cur * sizeof (struct wpi_tx_cmd)); 2628 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon)); 2629 desc->segs[1].addr = htole32(data->map->dm_segs[0].ds_addr); 2630 desc->segs[1].len = htole32(data->map->dm_segs[0].ds_len); 2631 2632 /* kick cmd ring */ 2633 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2634 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2635 2636 return 0; 2637 } 2638 2639 static int 2640 wpi_auth(struct wpi_softc *sc) 2641 { 2642 struct ieee80211com *ic = &sc->sc_ic; 2643 struct ieee80211_node *ni = ic->ic_bss; 2644 struct wpi_node_info node; 2645 int error; 2646 2647 /* update adapter's configuration */ 2648 IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid); 2649 sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan); 2650 sc->config.flags = htole32(WPI_CONFIG_TSF); 2651 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 2652 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2653 WPI_CONFIG_24GHZ); 2654 } 2655 switch (ic->ic_curmode) { 2656 case IEEE80211_MODE_11A: 2657 sc->config.cck_mask = 0; 2658 sc->config.ofdm_mask = 0x15; 2659 break; 2660 case IEEE80211_MODE_11B: 2661 sc->config.cck_mask = 0x03; 2662 sc->config.ofdm_mask = 0; 2663 break; 2664 default: /* assume 802.11b/g */ 2665 sc->config.cck_mask = 0x0f; 2666 sc->config.ofdm_mask = 0x15; 2667 } 2668 DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan, 2669 sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask)); 2670 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2671 sizeof (struct wpi_config), 1); 2672 if (error != 0) { 2673 aprint_error_dev(sc->sc_dev, "could not configure\n"); 2674 return error; 2675 } 2676 2677 /* configuration has changed, set Tx power accordingly */ 2678 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { 2679 aprint_error_dev(sc->sc_dev, "could not set Tx power\n"); 2680 return error; 2681 } 2682 2683 /* add default node */ 2684 memset(&node, 0, sizeof node); 2685 IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid); 2686 node.id = WPI_ID_BSS; 2687 node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2688 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2689 node.action = htole32(WPI_ACTION_SET_RATE); 2690 node.antenna = WPI_ANTENNA_BOTH; 2691 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1); 2692 if (error != 0) { 2693 aprint_error_dev(sc->sc_dev, "could not add BSS node\n"); 2694 return error; 2695 } 2696 2697 return 0; 2698 } 2699 2700 /* 2701 * Send a scan request to the firmware. Since this command is huge, we map it 2702 * into a mbuf instead of using the pre-allocated set of commands. 2703 */ 2704 static int 2705 wpi_scan(struct wpi_softc *sc, uint16_t flags) 2706 { 2707 struct ieee80211com *ic = &sc->sc_ic; 2708 struct wpi_tx_ring *ring = &sc->cmdq; 2709 struct wpi_tx_desc *desc; 2710 struct wpi_tx_data *data; 2711 struct wpi_tx_cmd *cmd; 2712 struct wpi_scan_hdr *hdr; 2713 struct wpi_scan_chan *chan; 2714 struct ieee80211_frame *wh; 2715 struct ieee80211_rateset *rs; 2716 struct ieee80211_channel *c; 2717 enum ieee80211_phymode mode; 2718 uint8_t *frm; 2719 int pktlen, error, nrates; 2720 2721 desc = &ring->desc[ring->cur]; 2722 data = &ring->data[ring->cur]; 2723 2724 MGETHDR(data->m, M_DONTWAIT, MT_DATA); 2725 if (data->m == NULL) { 2726 aprint_error_dev(sc->sc_dev, 2727 "could not allocate mbuf for scan command\n"); 2728 return ENOMEM; 2729 } 2730 MCLGET(data->m, M_DONTWAIT); 2731 if (!(data->m->m_flags & M_EXT)) { 2732 m_freem(data->m); 2733 data->m = NULL; 2734 aprint_error_dev(sc->sc_dev, 2735 "could not allocate mbuf for scan command\n"); 2736 return ENOMEM; 2737 } 2738 2739 cmd = mtod(data->m, struct wpi_tx_cmd *); 2740 cmd->code = WPI_CMD_SCAN; 2741 cmd->flags = 0; 2742 cmd->qid = ring->qid; 2743 cmd->idx = ring->cur; 2744 2745 hdr = (struct wpi_scan_hdr *)cmd->data; 2746 memset(hdr, 0, sizeof (struct wpi_scan_hdr)); 2747 hdr->cmd.flags = htole32(WPI_TX_AUTO_SEQ); 2748 hdr->cmd.id = WPI_ID_BROADCAST; 2749 hdr->cmd.lifetime = htole32(WPI_LIFETIME_INFINITE); 2750 /* 2751 * Move to the next channel if no packets are received within 5 msecs 2752 * after sending the probe request (this helps to reduce the duration 2753 * of active scans). 2754 */ 2755 hdr->quiet = htole16(5); /* timeout in milliseconds */ 2756 hdr->plcp_threshold = htole16(1); /* min # of packets */ 2757 2758 if (flags & IEEE80211_CHAN_A) { 2759 hdr->crc_threshold = htole16(1); 2760 /* send probe requests at 6Mbps */ 2761 hdr->cmd.rate = wpi_plcp_signal(12); 2762 } else { 2763 hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO); 2764 /* send probe requests at 1Mbps */ 2765 hdr->cmd.rate = wpi_plcp_signal(2); 2766 } 2767 2768 /* for directed scans, firmware inserts the essid IE itself */ 2769 hdr->essid[0].id = IEEE80211_ELEMID_SSID; 2770 hdr->essid[0].len = ic->ic_des_esslen; 2771 memcpy(hdr->essid[0].data, ic->ic_des_essid, ic->ic_des_esslen); 2772 2773 /* 2774 * Build a probe request frame. Most of the following code is a 2775 * copy & paste of what is done in net80211. 2776 */ 2777 wh = (struct ieee80211_frame *)(hdr + 1); 2778 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 2779 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 2780 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2781 IEEE80211_ADDR_COPY(wh->i_addr1, etherbroadcastaddr); 2782 IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); 2783 IEEE80211_ADDR_COPY(wh->i_addr3, etherbroadcastaddr); 2784 *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */ 2785 *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */ 2786 2787 frm = (uint8_t *)(wh + 1); 2788 2789 /* add empty essid IE (firmware generates it for directed scans) */ 2790 *frm++ = IEEE80211_ELEMID_SSID; 2791 *frm++ = 0; 2792 2793 mode = ieee80211_chan2mode(ic, ic->ic_ibss_chan); 2794 rs = &ic->ic_sup_rates[mode]; 2795 2796 /* add supported rates IE */ 2797 *frm++ = IEEE80211_ELEMID_RATES; 2798 nrates = rs->rs_nrates; 2799 if (nrates > IEEE80211_RATE_SIZE) 2800 nrates = IEEE80211_RATE_SIZE; 2801 *frm++ = nrates; 2802 memcpy(frm, rs->rs_rates, nrates); 2803 frm += nrates; 2804 2805 /* add supported xrates IE */ 2806 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 2807 nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 2808 *frm++ = IEEE80211_ELEMID_XRATES; 2809 *frm++ = nrates; 2810 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 2811 frm += nrates; 2812 } 2813 2814 /* setup length of probe request */ 2815 hdr->cmd.len = htole16(frm - (uint8_t *)wh); 2816 2817 chan = (struct wpi_scan_chan *)frm; 2818 for (c = &ic->ic_channels[1]; 2819 c <= &ic->ic_channels[IEEE80211_CHAN_MAX]; c++) { 2820 if ((c->ic_flags & flags) != flags) 2821 continue; 2822 2823 chan->chan = ieee80211_chan2ieee(ic, c); 2824 chan->flags = 0; 2825 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2826 chan->flags |= WPI_CHAN_ACTIVE; 2827 if (ic->ic_des_esslen != 0) 2828 chan->flags |= WPI_CHAN_DIRECT; 2829 } 2830 chan->dsp_gain = 0x6e; 2831 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2832 chan->rf_gain = 0x3b; 2833 chan->active = htole16(10); 2834 chan->passive = htole16(110); 2835 } else { 2836 chan->rf_gain = 0x28; 2837 chan->active = htole16(20); 2838 chan->passive = htole16(120); 2839 } 2840 hdr->nchan++; 2841 chan++; 2842 2843 frm += sizeof (struct wpi_scan_chan); 2844 } 2845 2846 hdr->len = htole16(frm - (uint8_t *)hdr); 2847 pktlen = frm - (uint8_t *)cmd; 2848 2849 error = bus_dmamap_load(sc->sc_dmat, data->map, cmd, pktlen, NULL, 2850 BUS_DMA_NOWAIT); 2851 if (error != 0) { 2852 aprint_error_dev(sc->sc_dev, "could not map scan command\n"); 2853 m_freem(data->m); 2854 data->m = NULL; 2855 return error; 2856 } 2857 2858 desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24); 2859 desc->segs[0].addr = htole32(data->map->dm_segs[0].ds_addr); 2860 desc->segs[0].len = htole32(data->map->dm_segs[0].ds_len); 2861 2862 /* kick cmd ring */ 2863 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2864 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2865 2866 return 0; /* will be notified async. of failure/success */ 2867 } 2868 2869 static int 2870 wpi_config(struct wpi_softc *sc) 2871 { 2872 struct ieee80211com *ic = &sc->sc_ic; 2873 struct ifnet *ifp = ic->ic_ifp; 2874 struct wpi_power power; 2875 struct wpi_bluetooth bluetooth; 2876 struct wpi_node_info node; 2877 int error; 2878 2879 memset(&power, 0, sizeof power); 2880 power.flags = htole32(WPI_POWER_CAM | 0x8); 2881 error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0); 2882 if (error != 0) { 2883 aprint_error_dev(sc->sc_dev, "could not set power mode\n"); 2884 return error; 2885 } 2886 2887 /* configure bluetooth coexistence */ 2888 memset(&bluetooth, 0, sizeof bluetooth); 2889 bluetooth.flags = 3; 2890 bluetooth.lead = 0xaa; 2891 bluetooth.kill = 1; 2892 error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth, 2893 0); 2894 if (error != 0) { 2895 aprint_error_dev(sc->sc_dev, 2896 "could not configure bluetooth coexistence\n"); 2897 return error; 2898 } 2899 2900 /* configure adapter */ 2901 memset(&sc->config, 0, sizeof (struct wpi_config)); 2902 IEEE80211_ADDR_COPY(ic->ic_myaddr, CLLADDR(ifp->if_sadl)); 2903 IEEE80211_ADDR_COPY(sc->config.myaddr, ic->ic_myaddr); 2904 /* set default channel */ 2905 sc->config.chan = ieee80211_chan2ieee(ic, ic->ic_ibss_chan); 2906 sc->config.flags = htole32(WPI_CONFIG_TSF); 2907 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_ibss_chan)) { 2908 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2909 WPI_CONFIG_24GHZ); 2910 } 2911 sc->config.filter = 0; 2912 switch (ic->ic_opmode) { 2913 case IEEE80211_M_STA: 2914 sc->config.mode = WPI_MODE_STA; 2915 sc->config.filter |= htole32(WPI_FILTER_MULTICAST); 2916 break; 2917 case IEEE80211_M_IBSS: 2918 case IEEE80211_M_AHDEMO: 2919 sc->config.mode = WPI_MODE_IBSS; 2920 break; 2921 case IEEE80211_M_HOSTAP: 2922 sc->config.mode = WPI_MODE_HOSTAP; 2923 break; 2924 case IEEE80211_M_MONITOR: 2925 sc->config.mode = WPI_MODE_MONITOR; 2926 sc->config.filter |= htole32(WPI_FILTER_MULTICAST | 2927 WPI_FILTER_CTL | WPI_FILTER_PROMISC); 2928 break; 2929 } 2930 sc->config.cck_mask = 0x0f; /* not yet negotiated */ 2931 sc->config.ofdm_mask = 0xff; /* not yet negotiated */ 2932 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2933 sizeof (struct wpi_config), 0); 2934 if (error != 0) { 2935 aprint_error_dev(sc->sc_dev, "configure command failed\n"); 2936 return error; 2937 } 2938 2939 /* configuration has changed, set Tx power accordingly */ 2940 if ((error = wpi_set_txpower(sc, ic->ic_ibss_chan, 0)) != 0) { 2941 aprint_error_dev(sc->sc_dev, "could not set Tx power\n"); 2942 return error; 2943 } 2944 2945 /* add broadcast node */ 2946 memset(&node, 0, sizeof node); 2947 IEEE80211_ADDR_COPY(node.bssid, etherbroadcastaddr); 2948 node.id = WPI_ID_BROADCAST; 2949 node.rate = wpi_plcp_signal(2); 2950 node.action = htole32(WPI_ACTION_SET_RATE); 2951 node.antenna = WPI_ANTENNA_BOTH; 2952 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0); 2953 if (error != 0) { 2954 aprint_error_dev(sc->sc_dev, "could not add broadcast node\n"); 2955 return error; 2956 } 2957 2958 if ((error = wpi_mrr_setup(sc)) != 0) { 2959 aprint_error_dev(sc->sc_dev, "could not setup MRR\n"); 2960 return error; 2961 } 2962 2963 return 0; 2964 } 2965 2966 static void 2967 wpi_stop_master(struct wpi_softc *sc) 2968 { 2969 uint32_t tmp; 2970 int ntries; 2971 2972 tmp = WPI_READ(sc, WPI_RESET); 2973 WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER); 2974 2975 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2976 if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP) 2977 return; /* already asleep */ 2978 2979 for (ntries = 0; ntries < 100; ntries++) { 2980 if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED) 2981 break; 2982 DELAY(10); 2983 } 2984 if (ntries == 100) { 2985 aprint_error_dev(sc->sc_dev, "timeout waiting for master\n"); 2986 } 2987 } 2988 2989 static int 2990 wpi_power_up(struct wpi_softc *sc) 2991 { 2992 uint32_t tmp; 2993 int ntries; 2994 2995 wpi_mem_lock(sc); 2996 tmp = wpi_mem_read(sc, WPI_MEM_POWER); 2997 wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000); 2998 wpi_mem_unlock(sc); 2999 3000 for (ntries = 0; ntries < 5000; ntries++) { 3001 if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED) 3002 break; 3003 DELAY(10); 3004 } 3005 if (ntries == 5000) { 3006 aprint_error_dev(sc->sc_dev, 3007 "timeout waiting for NIC to power up\n"); 3008 return ETIMEDOUT; 3009 } 3010 return 0; 3011 } 3012 3013 static int 3014 wpi_reset(struct wpi_softc *sc) 3015 { 3016 uint32_t tmp; 3017 int ntries; 3018 3019 /* clear any pending interrupts */ 3020 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 3021 3022 tmp = WPI_READ(sc, WPI_PLL_CTL); 3023 WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT); 3024 3025 tmp = WPI_READ(sc, WPI_CHICKEN); 3026 WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS); 3027 3028 tmp = WPI_READ(sc, WPI_GPIO_CTL); 3029 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT); 3030 3031 /* wait for clock stabilization */ 3032 for (ntries = 0; ntries < 1000; ntries++) { 3033 if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK) 3034 break; 3035 DELAY(10); 3036 } 3037 if (ntries == 1000) { 3038 aprint_error_dev(sc->sc_dev, 3039 "timeout waiting for clock stabilization\n"); 3040 return ETIMEDOUT; 3041 } 3042 3043 /* initialize EEPROM */ 3044 tmp = WPI_READ(sc, WPI_EEPROM_STATUS); 3045 if ((tmp & WPI_EEPROM_VERSION) == 0) { 3046 aprint_error_dev(sc->sc_dev, "EEPROM not found\n"); 3047 return EIO; 3048 } 3049 WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED); 3050 3051 return 0; 3052 } 3053 3054 static void 3055 wpi_hw_config(struct wpi_softc *sc) 3056 { 3057 uint32_t rev, hw; 3058 3059 /* voodoo from the reference driver */ 3060 hw = WPI_READ(sc, WPI_HWCONFIG); 3061 3062 rev = pci_conf_read(sc->sc_pct, sc->sc_pcitag, PCI_CLASS_REG); 3063 rev = PCI_REVISION(rev); 3064 if ((rev & 0xc0) == 0x40) 3065 hw |= WPI_HW_ALM_MB; 3066 else if (!(rev & 0x80)) 3067 hw |= WPI_HW_ALM_MM; 3068 3069 if (sc->cap == 0x80) 3070 hw |= WPI_HW_SKU_MRC; 3071 3072 hw &= ~WPI_HW_REV_D; 3073 if ((le16toh(sc->rev) & 0xf0) == 0xd0) 3074 hw |= WPI_HW_REV_D; 3075 3076 if (sc->type > 1) 3077 hw |= WPI_HW_TYPE_B; 3078 3079 DPRINTF(("setting h/w config %x\n", hw)); 3080 WPI_WRITE(sc, WPI_HWCONFIG, hw); 3081 } 3082 3083 static int 3084 wpi_init(struct ifnet *ifp) 3085 { 3086 struct wpi_softc *sc = ifp->if_softc; 3087 struct ieee80211com *ic = &sc->sc_ic; 3088 uint32_t tmp; 3089 int qid, ntries, error; 3090 3091 wpi_stop(ifp,1); 3092 (void)wpi_reset(sc); 3093 3094 wpi_mem_lock(sc); 3095 wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00); 3096 DELAY(20); 3097 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 3098 wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800); 3099 wpi_mem_unlock(sc); 3100 3101 (void)wpi_power_up(sc); 3102 wpi_hw_config(sc); 3103 3104 /* init Rx ring */ 3105 wpi_mem_lock(sc); 3106 WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr); 3107 WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr + 3108 offsetof(struct wpi_shared, next)); 3109 WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7); 3110 WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010); 3111 wpi_mem_unlock(sc); 3112 3113 /* init Tx rings */ 3114 wpi_mem_lock(sc); 3115 wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */ 3116 wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */ 3117 wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */ 3118 wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000); 3119 wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002); 3120 wpi_mem_write(sc, WPI_MEM_MAGIC4, 4); 3121 wpi_mem_write(sc, WPI_MEM_MAGIC5, 5); 3122 3123 WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr); 3124 WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5); 3125 3126 for (qid = 0; qid < 6; qid++) { 3127 WPI_WRITE(sc, WPI_TX_CTL(qid), 0); 3128 WPI_WRITE(sc, WPI_TX_BASE(qid), 0); 3129 WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008); 3130 } 3131 wpi_mem_unlock(sc); 3132 3133 /* clear "radio off" and "disable command" bits (reversed logic) */ 3134 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3135 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3136 3137 /* clear any pending interrupts */ 3138 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 3139 /* enable interrupts */ 3140 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 3141 3142 /* not sure why/if this is necessary... */ 3143 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3144 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3145 3146 if ((error = wpi_load_firmware(sc)) != 0) 3147 /* wpi_load_firmware prints error messages for us. */ 3148 goto fail1; 3149 3150 /* Check the status of the radio switch */ 3151 if (wpi_getrfkill(sc)) { 3152 aprint_error_dev(sc->sc_dev, 3153 "radio is disabled by hardware switch\n"); 3154 error = EBUSY; 3155 goto fail1; 3156 } 3157 3158 /* wait for thermal sensors to calibrate */ 3159 for (ntries = 0; ntries < 1000; ntries++) { 3160 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3161 break; 3162 DELAY(10); 3163 } 3164 if (ntries == 1000) { 3165 aprint_error_dev(sc->sc_dev, 3166 "timeout waiting for thermal sensors calibration\n"); 3167 error = ETIMEDOUT; 3168 goto fail1; 3169 } 3170 DPRINTF(("temperature %d\n", sc->temp)); 3171 3172 if ((error = wpi_config(sc)) != 0) { 3173 aprint_error_dev(sc->sc_dev, "could not configure device\n"); 3174 goto fail1; 3175 } 3176 3177 ifp->if_flags &= ~IFF_OACTIVE; 3178 ifp->if_flags |= IFF_RUNNING; 3179 3180 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 3181 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 3182 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 3183 } 3184 else 3185 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 3186 3187 return 0; 3188 3189 fail1: wpi_stop(ifp, 1); 3190 return error; 3191 } 3192 3193 static void 3194 wpi_stop(struct ifnet *ifp, int disable) 3195 { 3196 struct wpi_softc *sc = ifp->if_softc; 3197 struct ieee80211com *ic = &sc->sc_ic; 3198 uint32_t tmp; 3199 int ac; 3200 3201 ifp->if_timer = sc->sc_tx_timer = 0; 3202 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 3203 3204 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 3205 3206 /* disable interrupts */ 3207 WPI_WRITE(sc, WPI_MASK, 0); 3208 WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK); 3209 WPI_WRITE(sc, WPI_INTR_STATUS, 0xff); 3210 WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000); 3211 3212 wpi_mem_lock(sc); 3213 wpi_mem_write(sc, WPI_MEM_MODE, 0); 3214 wpi_mem_unlock(sc); 3215 3216 /* reset all Tx rings */ 3217 for (ac = 0; ac < 4; ac++) 3218 wpi_reset_tx_ring(sc, &sc->txq[ac]); 3219 wpi_reset_tx_ring(sc, &sc->cmdq); 3220 3221 /* reset Rx ring */ 3222 wpi_reset_rx_ring(sc, &sc->rxq); 3223 3224 wpi_mem_lock(sc); 3225 wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200); 3226 wpi_mem_unlock(sc); 3227 3228 DELAY(5); 3229 3230 wpi_stop_master(sc); 3231 3232 tmp = WPI_READ(sc, WPI_RESET); 3233 WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET); 3234 } 3235 3236 static bool 3237 wpi_resume(device_t dv, const pmf_qual_t *qual) 3238 { 3239 struct wpi_softc *sc = device_private(dv); 3240 3241 (void)wpi_reset(sc); 3242 3243 return true; 3244 } 3245 3246 /* 3247 * Return whether or not the radio is enabled in hardware 3248 * (i.e. the rfkill switch is "off"). 3249 */ 3250 static int 3251 wpi_getrfkill(struct wpi_softc *sc) 3252 { 3253 uint32_t tmp; 3254 3255 wpi_mem_lock(sc); 3256 tmp = wpi_mem_read(sc, WPI_MEM_RFKILL); 3257 wpi_mem_unlock(sc); 3258 3259 return !(tmp & 0x01); 3260 } 3261 3262 static int 3263 wpi_sysctl_radio(SYSCTLFN_ARGS) 3264 { 3265 struct sysctlnode node; 3266 struct wpi_softc *sc; 3267 int val, error; 3268 3269 node = *rnode; 3270 sc = (struct wpi_softc *)node.sysctl_data; 3271 3272 val = !wpi_getrfkill(sc); 3273 3274 node.sysctl_data = &val; 3275 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 3276 3277 if (error || newp == NULL) 3278 return error; 3279 3280 return 0; 3281 } 3282 3283 static void 3284 wpi_sysctlattach(struct wpi_softc *sc) 3285 { 3286 int rc; 3287 const struct sysctlnode *rnode; 3288 const struct sysctlnode *cnode; 3289 3290 struct sysctllog **clog = &sc->sc_sysctllog; 3291 3292 if ((rc = sysctl_createv(clog, 0, NULL, &rnode, 3293 CTLFLAG_PERMANENT, CTLTYPE_NODE, device_xname(sc->sc_dev), 3294 SYSCTL_DESCR("wpi controls and statistics"), 3295 NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL)) != 0) 3296 goto err; 3297 3298 if ((rc = sysctl_createv(clog, 0, &rnode, &cnode, 3299 CTLFLAG_PERMANENT, CTLTYPE_INT, "radio", 3300 SYSCTL_DESCR("radio transmitter switch state (0=off, 1=on)"), 3301 wpi_sysctl_radio, 0, (void *)sc, 0, CTL_CREATE, CTL_EOL)) != 0) 3302 goto err; 3303 3304 #ifdef WPI_DEBUG 3305 /* control debugging printfs */ 3306 if ((rc = sysctl_createv(clog, 0, &rnode, &cnode, 3307 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 3308 "debug", SYSCTL_DESCR("Enable debugging output"), 3309 NULL, 0, &wpi_debug, 0, CTL_CREATE, CTL_EOL)) != 0) 3310 goto err; 3311 #endif 3312 3313 return; 3314 err: 3315 aprint_error("%s: sysctl_createv failed (rc = %d)\n", __func__, rc); 3316 } 3317
Indexes created Mon Sep 29 03:10:08 GMT 2025