1 /*- 2 * Copyright (c) 2006,2007 3 * Damien Bergamini <damien.bergamini@free.fr> 4 * Benjamin Close <Benjamin.Close@clearchain.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 * 18 * $FreeBSD: src/sys/dev/wpi/if_wpi.c,v 1.27.2.2 2010/02/14 09:34:27 gavin Exp $ 19 */ 20 21 #define VERSION "20071127" 22 23 /* 24 * Driver for Intel PRO/Wireless 3945ABG 802.11 network adapters. 25 * 26 * The 3945ABG network adapter doesn't use traditional hardware as 27 * many other adaptors do. Instead at run time the eeprom is set into a known 28 * state and told to load boot firmware. The boot firmware loads an init and a 29 * main binary firmware image into SRAM on the card via DMA. 30 * Once the firmware is loaded, the driver/hw then 31 * communicate by way of circular dma rings via the the SRAM to the firmware. 32 * 33 * There is 6 memory rings. 1 command ring, 1 rx data ring & 4 tx data rings. 34 * The 4 tx data rings allow for prioritization QoS. 35 * 36 * The rx data ring consists of 32 dma buffers. Two registers are used to 37 * indicate where in the ring the driver and the firmware are up to. The 38 * driver sets the initial read index (reg1) and the initial write index (reg2), 39 * the firmware updates the read index (reg1) on rx of a packet and fires an 40 * interrupt. The driver then processes the buffers starting at reg1 indicating 41 * to the firmware which buffers have been accessed by updating reg2. At the 42 * same time allocating new memory for the processed buffer. 43 * 44 * A similar thing happens with the tx rings. The difference is the firmware 45 * stop processing buffers once the queue is full and until confirmation 46 * of a successful transmition (tx_intr) has occurred. 47 * 48 * The command ring operates in the same manner as the tx queues. 49 * 50 * All communication direct to the card (ie eeprom) is classed as Stage1 51 * communication 52 * 53 * All communication via the firmware to the card is classed as State2. 54 * The firmware consists of 2 parts. A bootstrap firmware and a runtime 55 * firmware. The bootstrap firmware and runtime firmware are loaded 56 * from host memory via dma to the card then told to execute. From this point 57 * on the majority of communications between the driver and the card goes 58 * via the firmware. 59 */ 60 61 #include <sys/param.h> 62 #include <sys/sysctl.h> 63 #include <sys/sockio.h> 64 #include <sys/mbuf.h> 65 #include <sys/kernel.h> 66 #include <sys/socket.h> 67 #include <sys/systm.h> 68 #include <sys/malloc.h> 69 #include <sys/queue.h> 70 #include <sys/taskqueue.h> 71 #include <sys/module.h> 72 #include <sys/bus.h> 73 #include <sys/endian.h> 74 #include <sys/linker.h> 75 #include <sys/firmware.h> 76 77 #include <sys/resource.h> 78 #include <sys/rman.h> 79 80 #include <bus/pci/pcireg.h> 81 #include <bus/pci/pcivar.h> 82 83 #include <net/bpf.h> 84 #include <net/if.h> 85 #include <net/if_arp.h> 86 #include <net/ifq_var.h> 87 #include <net/ethernet.h> 88 #include <net/if_dl.h> 89 #include <net/if_media.h> 90 #include <net/if_types.h> 91 92 #include <netproto/802_11/ieee80211_var.h> 93 #include <netproto/802_11/ieee80211_radiotap.h> 94 #include <netproto/802_11/ieee80211_regdomain.h> 95 #include <netproto/802_11/ieee80211_ratectl.h> 96 97 #include <netinet/in.h> 98 #include <netinet/in_systm.h> 99 #include <netinet/in_var.h> 100 #include <netinet/ip.h> 101 #include <netinet/if_ether.h> 102 103 /* XXX: move elsewhere */ 104 #define abs(x) (((x) < 0) ? -(x) : (x)) 105 106 #include "if_wpireg.h" 107 #include "if_wpivar.h" 108 109 #define WPI_DEBUG 110 111 #ifdef WPI_DEBUG 112 #define DPRINTF(x) do { if (wpi_debug != 0) kprintf x; } while (0) 113 #define DPRINTFN(n, x) do { if (wpi_debug & n) kprintf x; } while (0) 114 #define WPI_DEBUG_SET (wpi_debug != 0) 115 116 enum { 117 WPI_DEBUG_UNUSED = 0x00000001, /* Unused */ 118 WPI_DEBUG_HW = 0x00000002, /* Stage 1 (eeprom) debugging */ 119 WPI_DEBUG_TX = 0x00000004, /* Stage 2 TX intrp debugging*/ 120 WPI_DEBUG_RX = 0x00000008, /* Stage 2 RX intrp debugging */ 121 WPI_DEBUG_CMD = 0x00000010, /* Stage 2 CMD intrp debugging*/ 122 WPI_DEBUG_FIRMWARE = 0x00000020, /* firmware(9) loading debug */ 123 WPI_DEBUG_DMA = 0x00000040, /* DMA (de)allocations/syncs */ 124 WPI_DEBUG_SCANNING = 0x00000080, /* Stage 2 Scanning debugging */ 125 WPI_DEBUG_NOTIFY = 0x00000100, /* State 2 Noftif intr debug */ 126 WPI_DEBUG_TEMP = 0x00000200, /* TXPower/Temp Calibration */ 127 WPI_DEBUG_OPS = 0x00000400, /* wpi_ops taskq debug */ 128 WPI_DEBUG_WATCHDOG = 0x00000800, /* Watch dog debug */ 129 WPI_DEBUG_ANY = 0xffffffff 130 }; 131 132 static int wpi_debug = 1; 133 SYSCTL_INT(_debug, OID_AUTO, wpi, CTLFLAG_RW, &wpi_debug, 0, "wpi debug level"); 134 TUNABLE_INT("debug.wpi", &wpi_debug); 135 136 #else 137 #define DPRINTF(x) 138 #define DPRINTFN(n, x) 139 #define WPI_DEBUG_SET 0 140 #endif 141 142 struct wpi_ident { 143 uint16_t vendor; 144 uint16_t device; 145 uint16_t subdevice; 146 const char *name; 147 }; 148 149 static const struct wpi_ident wpi_ident_table[] = { 150 /* The below entries support ABG regardless of the subid */ 151 { 0x8086, 0x4222, 0x0, "Intel(R) PRO/Wireless 3945ABG" }, 152 { 0x8086, 0x4227, 0x0, "Intel(R) PRO/Wireless 3945ABG" }, 153 /* The below entries only support BG */ 154 { 0x8086, 0x4222, 0x1005, "Intel(R) PRO/Wireless 3945BG" }, 155 { 0x8086, 0x4222, 0x1034, "Intel(R) PRO/Wireless 3945BG" }, 156 { 0x8086, 0x4227, 0x1014, "Intel(R) PRO/Wireless 3945BG" }, 157 { 0x8086, 0x4222, 0x1044, "Intel(R) PRO/Wireless 3945BG" }, 158 { 0, 0, 0, NULL } 159 }; 160 161 static struct ieee80211vap *wpi_vap_create(struct ieee80211com *, 162 const char name[IFNAMSIZ], int unit, 163 enum ieee80211_opmode opmode, 164 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN], 165 const uint8_t mac[IEEE80211_ADDR_LEN]); 166 static void wpi_vap_delete(struct ieee80211vap *); 167 static int wpi_dma_contig_alloc(struct wpi_softc *, struct wpi_dma_info *, 168 void **, bus_size_t, bus_size_t, int); 169 static void wpi_dma_contig_free(struct wpi_dma_info *); 170 static void wpi_dma_map_addr(void *, bus_dma_segment_t *, int, int); 171 static int wpi_alloc_shared(struct wpi_softc *); 172 static void wpi_free_shared(struct wpi_softc *); 173 static int wpi_alloc_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 174 static void wpi_reset_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 175 static void wpi_free_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 176 static int wpi_alloc_tx_ring(struct wpi_softc *, struct wpi_tx_ring *, 177 int, int); 178 static void wpi_reset_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 179 static void wpi_free_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 180 static struct ieee80211_node *wpi_node_alloc(struct ieee80211vap *, 181 const uint8_t mac[IEEE80211_ADDR_LEN]); 182 static int wpi_newstate(struct ieee80211vap *, enum ieee80211_state, int); 183 static void wpi_mem_lock(struct wpi_softc *); 184 static void wpi_mem_unlock(struct wpi_softc *); 185 static uint32_t wpi_mem_read(struct wpi_softc *, uint16_t); 186 static void wpi_mem_write(struct wpi_softc *, uint16_t, uint32_t); 187 static void wpi_mem_write_region_4(struct wpi_softc *, uint16_t, 188 const uint32_t *, int); 189 static uint16_t wpi_read_prom_data(struct wpi_softc *, uint32_t, void *, int); 190 static int wpi_alloc_fwmem(struct wpi_softc *); 191 static void wpi_free_fwmem(struct wpi_softc *); 192 static int wpi_load_firmware(struct wpi_softc *); 193 static void wpi_unload_firmware(struct wpi_softc *); 194 static int wpi_load_microcode(struct wpi_softc *, const uint8_t *, int); 195 static void wpi_rx_intr(struct wpi_softc *, struct wpi_rx_desc *, 196 struct wpi_rx_data *); 197 static void wpi_tx_intr(struct wpi_softc *, struct wpi_rx_desc *); 198 static void wpi_cmd_intr(struct wpi_softc *, struct wpi_rx_desc *); 199 static void wpi_notif_intr(struct wpi_softc *); 200 static void wpi_intr(void *); 201 static uint8_t wpi_plcp_signal(int); 202 static void wpi_watchdog_callout(void *); 203 static int wpi_tx_data(struct wpi_softc *, struct mbuf *, 204 struct ieee80211_node *, int); 205 static void wpi_start(struct ifnet *, struct ifaltq_subque *); 206 static void wpi_start_locked(struct ifnet *); 207 static int wpi_raw_xmit(struct ieee80211_node *, struct mbuf *, 208 const struct ieee80211_bpf_params *); 209 static void wpi_scan_start(struct ieee80211com *); 210 static void wpi_scan_end(struct ieee80211com *); 211 static void wpi_set_channel(struct ieee80211com *); 212 static void wpi_scan_curchan(struct ieee80211_scan_state *, unsigned long); 213 static void wpi_scan_mindwell(struct ieee80211_scan_state *); 214 static int wpi_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *); 215 static void wpi_read_eeprom(struct wpi_softc *, 216 uint8_t macaddr[IEEE80211_ADDR_LEN]); 217 static void wpi_read_eeprom_channels(struct wpi_softc *, int); 218 static void wpi_read_eeprom_group(struct wpi_softc *, int); 219 static int wpi_cmd(struct wpi_softc *, int, const void *, int, int); 220 static int wpi_wme_update(struct ieee80211com *); 221 static int wpi_mrr_setup(struct wpi_softc *); 222 static void wpi_set_led(struct wpi_softc *, uint8_t, uint8_t, uint8_t); 223 static void wpi_enable_tsf(struct wpi_softc *, struct ieee80211_node *); 224 #if 0 225 static int wpi_setup_beacon(struct wpi_softc *, struct ieee80211_node *); 226 #endif 227 static int wpi_auth(struct wpi_softc *, struct ieee80211vap *); 228 static int wpi_run(struct wpi_softc *, struct ieee80211vap *); 229 static int wpi_scan(struct wpi_softc *); 230 static int wpi_config(struct wpi_softc *); 231 static void wpi_stop_master(struct wpi_softc *); 232 static int wpi_power_up(struct wpi_softc *); 233 static int wpi_reset(struct wpi_softc *); 234 static void wpi_hwreset_task(void *, int); 235 static void wpi_rfreset_task(void *, int); 236 static void wpi_hw_config(struct wpi_softc *); 237 static void wpi_init(void *); 238 static void wpi_init_locked(struct wpi_softc *, int); 239 static void wpi_stop(struct wpi_softc *); 240 static void wpi_stop_locked(struct wpi_softc *); 241 242 static int wpi_set_txpower(struct wpi_softc *, struct ieee80211_channel *, 243 int); 244 static void wpi_calib_timeout_callout(void *); 245 static void wpi_power_calibration(struct wpi_softc *, int); 246 static int wpi_get_power_index(struct wpi_softc *, 247 struct wpi_power_group *, struct ieee80211_channel *, int); 248 #ifdef WPI_DEBUG 249 static const char *wpi_cmd_str(int); 250 #endif 251 static int wpi_probe(device_t); 252 static int wpi_attach(device_t); 253 static int wpi_detach(device_t); 254 static int wpi_shutdown(device_t); 255 static int wpi_suspend(device_t); 256 static int wpi_resume(device_t); 257 258 259 static device_method_t wpi_methods[] = { 260 /* Device interface */ 261 DEVMETHOD(device_probe, wpi_probe), 262 DEVMETHOD(device_attach, wpi_attach), 263 DEVMETHOD(device_detach, wpi_detach), 264 DEVMETHOD(device_shutdown, wpi_shutdown), 265 DEVMETHOD(device_suspend, wpi_suspend), 266 DEVMETHOD(device_resume, wpi_resume), 267 268 DEVMETHOD_END 269 }; 270 271 static driver_t wpi_driver = { 272 "wpi", 273 wpi_methods, 274 sizeof (struct wpi_softc) 275 }; 276 277 static devclass_t wpi_devclass; 278 279 DRIVER_MODULE(wpi, pci, wpi_driver, wpi_devclass, NULL, NULL); 280 281 static const uint8_t wpi_ridx_to_plcp[] = { 282 /* OFDM: IEEE Std 802.11a-1999, pp. 14 Table 80 */ 283 /* R1-R4 (ral/ural is R4-R1) */ 284 0xd, 0xf, 0x5, 0x7, 0x9, 0xb, 0x1, 0x3, 285 /* CCK: device-dependent */ 286 10, 20, 55, 110 287 }; 288 static const uint8_t wpi_ridx_to_rate[] = { 289 12, 18, 24, 36, 48, 72, 96, 108, /* OFDM */ 290 2, 4, 11, 22 /*CCK */ 291 }; 292 293 294 static int 295 wpi_probe(device_t dev) 296 { 297 const struct wpi_ident *ident; 298 299 wlan_serialize_enter(); 300 for (ident = wpi_ident_table; ident->name != NULL; ident++) { 301 if (pci_get_vendor(dev) == ident->vendor && 302 pci_get_device(dev) == ident->device) { 303 device_set_desc(dev, ident->name); 304 wlan_serialize_exit(); 305 return 0; 306 } 307 } 308 wlan_serialize_exit(); 309 return ENXIO; 310 } 311 312 /** 313 * Load the firmare image from disk to the allocated dma buffer. 314 * we also maintain the reference to the firmware pointer as there 315 * is times where we may need to reload the firmware but we are not 316 * in a context that can access the filesystem (ie taskq cause by restart) 317 * 318 * @return 0 on success, an errno on failure 319 */ 320 static int 321 wpi_load_firmware(struct wpi_softc *sc) 322 { 323 const struct firmware *fp; 324 struct wpi_dma_info *dma = &sc->fw_dma; 325 const struct wpi_firmware_hdr *hdr; 326 const uint8_t *itext, *idata, *rtext, *rdata, *btext; 327 uint32_t itextsz, idatasz, rtextsz, rdatasz, btextsz; 328 int error; 329 330 DPRINTFN(WPI_DEBUG_FIRMWARE, 331 ("Attempting Loading Firmware from wpi_fw module\n")); 332 333 wlan_assert_serialized(); 334 wlan_serialize_exit(); 335 if (sc->fw_fp == NULL && (sc->fw_fp = firmware_get("wpifw")) == NULL) { 336 device_printf(sc->sc_dev, 337 "could not load firmware image 'wpifw_fw'\n"); 338 error = ENOENT; 339 wlan_serialize_enter(); 340 goto fail; 341 } 342 wlan_serialize_enter(); 343 344 fp = sc->fw_fp; 345 346 /* Validate the firmware is minimum a particular version */ 347 if (fp->version < WPI_FW_MINVERSION) { 348 device_printf(sc->sc_dev, 349 "firmware version is too old. Need %d, got %d\n", 350 WPI_FW_MINVERSION, 351 fp->version); 352 error = ENXIO; 353 goto fail; 354 } 355 356 if (fp->datasize < sizeof (struct wpi_firmware_hdr)) { 357 device_printf(sc->sc_dev, 358 "firmware file too short: %zu bytes\n", fp->datasize); 359 error = ENXIO; 360 goto fail; 361 } 362 363 hdr = (const struct wpi_firmware_hdr *)fp->data; 364 365 /* | RUNTIME FIRMWARE | INIT FIRMWARE | BOOT FW | 366 |HDR|<--TEXT-->|<--DATA-->|<--TEXT-->|<--DATA-->|<--TEXT-->| */ 367 368 rtextsz = le32toh(hdr->rtextsz); 369 rdatasz = le32toh(hdr->rdatasz); 370 itextsz = le32toh(hdr->itextsz); 371 idatasz = le32toh(hdr->idatasz); 372 btextsz = le32toh(hdr->btextsz); 373 374 /* check that all firmware segments are present */ 375 if (fp->datasize < sizeof (struct wpi_firmware_hdr) + 376 rtextsz + rdatasz + itextsz + idatasz + btextsz) { 377 device_printf(sc->sc_dev, 378 "firmware file too short: %zu bytes\n", fp->datasize); 379 error = ENXIO; /* XXX appropriate error code? */ 380 goto fail; 381 } 382 383 /* get pointers to firmware segments */ 384 rtext = (const uint8_t *)(hdr + 1); 385 rdata = rtext + rtextsz; 386 itext = rdata + rdatasz; 387 idata = itext + itextsz; 388 btext = idata + idatasz; 389 390 DPRINTFN(WPI_DEBUG_FIRMWARE, 391 ("Firmware Version: Major %d, Minor %d, Driver %d, \n" 392 "runtime (text: %u, data: %u) init (text: %u, data %u) boot (text %u)\n", 393 (le32toh(hdr->version) & 0xff000000) >> 24, 394 (le32toh(hdr->version) & 0x00ff0000) >> 16, 395 (le32toh(hdr->version) & 0x0000ffff), 396 rtextsz, rdatasz, 397 itextsz, idatasz, btextsz)); 398 399 DPRINTFN(WPI_DEBUG_FIRMWARE,("rtext 0x%x\n", *(const uint32_t *)rtext)); 400 DPRINTFN(WPI_DEBUG_FIRMWARE,("rdata 0x%x\n", *(const uint32_t *)rdata)); 401 DPRINTFN(WPI_DEBUG_FIRMWARE,("itext 0x%x\n", *(const uint32_t *)itext)); 402 DPRINTFN(WPI_DEBUG_FIRMWARE,("idata 0x%x\n", *(const uint32_t *)idata)); 403 DPRINTFN(WPI_DEBUG_FIRMWARE,("btext 0x%x\n", *(const uint32_t *)btext)); 404 405 /* sanity checks */ 406 if (rtextsz > WPI_FW_MAIN_TEXT_MAXSZ || 407 rdatasz > WPI_FW_MAIN_DATA_MAXSZ || 408 itextsz > WPI_FW_INIT_TEXT_MAXSZ || 409 idatasz > WPI_FW_INIT_DATA_MAXSZ || 410 btextsz > WPI_FW_BOOT_TEXT_MAXSZ || 411 (btextsz & 3) != 0) { 412 device_printf(sc->sc_dev, "firmware invalid\n"); 413 error = EINVAL; 414 goto fail; 415 } 416 417 /* copy initialization images into pre-allocated DMA-safe memory */ 418 memcpy(dma->vaddr, idata, idatasz); 419 memcpy(dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, itext, itextsz); 420 421 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE); 422 423 /* tell adapter where to find initialization images */ 424 wpi_mem_lock(sc); 425 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 426 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, idatasz); 427 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 428 dma->paddr + WPI_FW_INIT_DATA_MAXSZ); 429 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, itextsz); 430 wpi_mem_unlock(sc); 431 432 /* load firmware boot code */ 433 if ((error = wpi_load_microcode(sc, btext, btextsz)) != 0) { 434 device_printf(sc->sc_dev, "Failed to load microcode\n"); 435 goto fail; 436 } 437 438 /* now press "execute" */ 439 WPI_WRITE(sc, WPI_RESET, 0); 440 441 /* wait at most one second for the first alive notification */ 442 if ((error = zsleep(sc, &wlan_global_serializer, 0, "wpiinit", hz)) != 0) { 443 device_printf(sc->sc_dev, 444 "timeout waiting for adapter to initialize\n"); 445 goto fail; 446 } 447 448 /* copy runtime images into pre-allocated DMA-sage memory */ 449 memcpy(dma->vaddr, rdata, rdatasz); 450 memcpy(dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, rtext, rtextsz); 451 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE); 452 453 /* tell adapter where to find runtime images */ 454 wpi_mem_lock(sc); 455 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 456 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, rdatasz); 457 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 458 dma->paddr + WPI_FW_MAIN_DATA_MAXSZ); 459 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | rtextsz); 460 wpi_mem_unlock(sc); 461 462 /* wait at most one second for the first alive notification */ 463 if ((error = zsleep(sc, &wlan_global_serializer, 0, "wpiinit", hz)) != 0) { 464 device_printf(sc->sc_dev, 465 "timeout waiting for adapter to initialize2\n"); 466 goto fail; 467 } 468 469 DPRINTFN(WPI_DEBUG_FIRMWARE, 470 ("Firmware loaded to driver successfully\n")); 471 return error; 472 fail: 473 wpi_unload_firmware(sc); 474 return error; 475 } 476 477 /** 478 * Free the referenced firmware image 479 */ 480 static void 481 wpi_unload_firmware(struct wpi_softc *sc) 482 { 483 if (sc->fw_fp) { 484 wlan_assert_serialized(); 485 wlan_serialize_exit(); 486 firmware_put(sc->fw_fp, FIRMWARE_UNLOAD); 487 wlan_serialize_enter(); 488 sc->fw_fp = NULL; 489 } 490 } 491 492 static int 493 wpi_attach(device_t dev) 494 { 495 struct wpi_softc *sc; 496 struct ifnet *ifp; 497 struct ieee80211com *ic; 498 int ac, error, supportsa = 1; 499 uint32_t tmp; 500 const struct wpi_ident *ident; 501 uint8_t macaddr[IEEE80211_ADDR_LEN]; 502 503 wlan_serialize_enter(); 504 sc = device_get_softc(dev); 505 sc->sc_dev = dev; 506 507 if (bootverbose || WPI_DEBUG_SET) 508 device_printf(sc->sc_dev,"Driver Revision %s\n", VERSION); 509 510 /* 511 * Some card's only support 802.11b/g not a, check to see if 512 * this is one such card. A 0x0 in the subdevice table indicates 513 * the entire subdevice range is to be ignored. 514 */ 515 for (ident = wpi_ident_table; ident->name != NULL; ident++) { 516 if (ident->subdevice && 517 pci_get_subdevice(dev) == ident->subdevice) { 518 supportsa = 0; 519 break; 520 } 521 } 522 523 /* Create the tasks that can be queued */ 524 TASK_INIT(&sc->sc_restarttask, 0, wpi_hwreset_task, sc); 525 TASK_INIT(&sc->sc_radiotask, 0, wpi_rfreset_task, sc); 526 527 callout_init(&sc->calib_to_callout); 528 callout_init(&sc->watchdog_to_callout); 529 530 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 531 device_printf(dev, "chip is in D%d power mode " 532 "-- setting to D0\n", pci_get_powerstate(dev)); 533 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 534 } 535 536 /* disable the retry timeout register */ 537 pci_write_config(dev, 0x41, 0, 1); 538 539 /* enable bus-mastering */ 540 pci_enable_busmaster(dev); 541 542 sc->mem_rid = PCIR_BAR(0); 543 sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid, 544 RF_ACTIVE); 545 if (sc->mem == NULL) { 546 device_printf(dev, "could not allocate memory resource\n"); 547 error = ENOMEM; 548 goto fail; 549 } 550 551 sc->sc_st = rman_get_bustag(sc->mem); 552 sc->sc_sh = rman_get_bushandle(sc->mem); 553 554 sc->irq_rid = 0; 555 sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid, 556 RF_ACTIVE | RF_SHAREABLE); 557 if (sc->irq == NULL) { 558 device_printf(dev, "could not allocate interrupt resource\n"); 559 error = ENOMEM; 560 goto fail; 561 } 562 563 /* 564 * Allocate DMA memory for firmware transfers. 565 */ 566 if ((error = wpi_alloc_fwmem(sc)) != 0) { 567 kprintf(": could not allocate firmware memory\n"); 568 error = ENOMEM; 569 goto fail; 570 } 571 572 /* 573 * Put adapter into a known state. 574 */ 575 if ((error = wpi_reset(sc)) != 0) { 576 device_printf(dev, "could not reset adapter\n"); 577 goto fail; 578 } 579 580 wpi_mem_lock(sc); 581 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 582 if (bootverbose || WPI_DEBUG_SET) 583 device_printf(sc->sc_dev, "Hardware Revision (0x%X)\n", tmp); 584 585 wpi_mem_unlock(sc); 586 587 /* Allocate shared page */ 588 if ((error = wpi_alloc_shared(sc)) != 0) { 589 device_printf(dev, "could not allocate shared page\n"); 590 goto fail; 591 } 592 593 /* tx data queues - 4 for QoS purposes */ 594 for (ac = 0; ac < WME_NUM_AC; ac++) { 595 error = wpi_alloc_tx_ring(sc, &sc->txq[ac], WPI_TX_RING_COUNT, ac); 596 if (error != 0) { 597 device_printf(dev, "could not allocate Tx ring %d\n",ac); 598 goto fail; 599 } 600 } 601 602 /* command queue to talk to the card's firmware */ 603 error = wpi_alloc_tx_ring(sc, &sc->cmdq, WPI_CMD_RING_COUNT, 4); 604 if (error != 0) { 605 device_printf(dev, "could not allocate command ring\n"); 606 goto fail; 607 } 608 609 /* receive data queue */ 610 error = wpi_alloc_rx_ring(sc, &sc->rxq); 611 if (error != 0) { 612 device_printf(dev, "could not allocate Rx ring\n"); 613 goto fail; 614 } 615 616 ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211); 617 if (ifp == NULL) { 618 device_printf(dev, "can not if_alloc()\n"); 619 error = ENOMEM; 620 goto fail; 621 } 622 ic = ifp->if_l2com; 623 624 ic->ic_ifp = ifp; 625 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 626 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 627 628 /* set device capabilities */ 629 ic->ic_caps = 630 IEEE80211_C_STA /* station mode supported */ 631 | IEEE80211_C_MONITOR /* monitor mode supported */ 632 | IEEE80211_C_TXPMGT /* tx power management */ 633 | IEEE80211_C_SHSLOT /* short slot time supported */ 634 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 635 | IEEE80211_C_WPA /* 802.11i */ 636 /* XXX looks like WME is partly supported? */ 637 #if 0 638 | IEEE80211_C_IBSS /* IBSS mode support */ 639 | IEEE80211_C_BGSCAN /* capable of bg scanning */ 640 | IEEE80211_C_WME /* 802.11e */ 641 | IEEE80211_C_HOSTAP /* Host access point mode */ 642 #endif 643 ; 644 645 /* 646 * Read in the eeprom and also setup the channels for 647 * net80211. We don't set the rates as net80211 does this for us 648 */ 649 wpi_read_eeprom(sc, macaddr); 650 651 if (bootverbose || WPI_DEBUG_SET) { 652 device_printf(sc->sc_dev, "Regulatory Domain: %.4s\n", sc->domain); 653 device_printf(sc->sc_dev, "Hardware Type: %c\n", 654 sc->type > 1 ? 'B': '?'); 655 device_printf(sc->sc_dev, "Hardware Revision: %c\n", 656 ((le16toh(sc->rev) & 0xf0) == 0xd0) ? 'D': '?'); 657 device_printf(sc->sc_dev, "SKU %s support 802.11a\n", 658 supportsa ? "does" : "does not"); 659 660 /* XXX hw_config uses the PCIDEV for the Hardware rev. Must check 661 what sc->rev really represents - benjsc 20070615 */ 662 } 663 664 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 665 ifp->if_softc = sc; 666 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 667 ifp->if_init = wpi_init; 668 ifp->if_ioctl = wpi_ioctl; 669 ifp->if_start = wpi_start; 670 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN); 671 #ifdef notyet 672 ifq_set_ready(&ifp->if_snd); 673 #endif 674 675 ieee80211_ifattach(ic, macaddr); 676 /* override default methods */ 677 ic->ic_node_alloc = wpi_node_alloc; 678 ic->ic_raw_xmit = wpi_raw_xmit; 679 ic->ic_wme.wme_update = wpi_wme_update; 680 ic->ic_scan_start = wpi_scan_start; 681 ic->ic_scan_end = wpi_scan_end; 682 ic->ic_set_channel = wpi_set_channel; 683 ic->ic_scan_curchan = wpi_scan_curchan; 684 ic->ic_scan_mindwell = wpi_scan_mindwell; 685 686 ic->ic_vap_create = wpi_vap_create; 687 ic->ic_vap_delete = wpi_vap_delete; 688 689 ieee80211_radiotap_attach(ic, 690 &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap), 691 WPI_TX_RADIOTAP_PRESENT, 692 &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap), 693 WPI_RX_RADIOTAP_PRESENT); 694 695 /* 696 * Hook our interrupt after all initialization is complete. 697 */ 698 error = bus_setup_intr(dev, sc->irq, INTR_MPSAFE, 699 wpi_intr, sc, &sc->sc_ih, &wlan_global_serializer); 700 if (error != 0) { 701 device_printf(dev, "could not set up interrupt\n"); 702 goto fail; 703 } 704 705 if (bootverbose) 706 ieee80211_announce(ic); 707 #ifdef XXX_DEBUG 708 ieee80211_announce_channels(ic); 709 #endif 710 wlan_serialize_exit(); 711 return 0; 712 713 fail: 714 wlan_serialize_exit(); 715 wpi_detach(dev); 716 return ENXIO; 717 } 718 719 static int 720 wpi_detach(device_t dev) 721 { 722 struct wpi_softc *sc; 723 struct ifnet *ifp; 724 struct ieee80211com *ic; 725 int ac; 726 727 wlan_serialize_enter(); 728 sc = device_get_softc(dev); 729 ifp = sc->sc_ifp; 730 if (ifp != NULL) { 731 ic = ifp->if_l2com; 732 733 ieee80211_draintask(ic, &sc->sc_restarttask); 734 ieee80211_draintask(ic, &sc->sc_radiotask); 735 wpi_stop(sc); 736 callout_stop(&sc->watchdog_to_callout); 737 callout_stop(&sc->calib_to_callout); 738 ieee80211_ifdetach(ic); 739 } 740 741 if (sc->txq[0].data_dmat) { 742 for (ac = 0; ac < WME_NUM_AC; ac++) 743 wpi_free_tx_ring(sc, &sc->txq[ac]); 744 745 wpi_free_tx_ring(sc, &sc->cmdq); 746 wpi_free_rx_ring(sc, &sc->rxq); 747 wpi_free_shared(sc); 748 } 749 750 if (sc->fw_fp != NULL) { 751 wpi_unload_firmware(sc); 752 } 753 754 if (sc->fw_dma.tag) 755 wpi_free_fwmem(sc); 756 757 if (sc->irq != NULL) { 758 bus_teardown_intr(dev, sc->irq, sc->sc_ih); 759 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, sc->irq); 760 } 761 762 if (sc->mem != NULL) 763 bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, sc->mem); 764 765 if (ifp != NULL) 766 if_free(ifp); 767 768 wlan_serialize_exit(); 769 return 0; 770 } 771 772 static struct ieee80211vap * 773 wpi_vap_create(struct ieee80211com *ic, 774 const char name[IFNAMSIZ], int unit, 775 enum ieee80211_opmode opmode, int flags, 776 const uint8_t bssid[IEEE80211_ADDR_LEN], 777 const uint8_t mac[IEEE80211_ADDR_LEN]) 778 { 779 struct wpi_vap *wvp; 780 struct ieee80211vap *vap; 781 782 if (!TAILQ_EMPTY(&ic->ic_vaps)) /* only one at a time */ 783 return NULL; 784 wvp = (struct wpi_vap *) kmalloc(sizeof(struct wpi_vap), 785 M_80211_VAP, M_INTWAIT | M_ZERO); 786 if (wvp == NULL) 787 return NULL; 788 vap = &wvp->vap; 789 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac); 790 /* override with driver methods */ 791 wvp->newstate = vap->iv_newstate; 792 vap->iv_newstate = wpi_newstate; 793 794 ieee80211_ratectl_init(vap); 795 796 /* complete setup */ 797 ieee80211_vap_attach(vap, ieee80211_media_change, ieee80211_media_status); 798 ic->ic_opmode = opmode; 799 return vap; 800 } 801 802 static void 803 wpi_vap_delete(struct ieee80211vap *vap) 804 { 805 struct wpi_vap *wvp = WPI_VAP(vap); 806 807 ieee80211_ratectl_deinit(vap); 808 ieee80211_vap_detach(vap); 809 kfree(wvp, M_80211_VAP); 810 } 811 812 static void 813 wpi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 814 { 815 if (error != 0) 816 return; 817 818 KASSERT(nsegs == 1, ("too many DMA segments, %d should be 1", nsegs)); 819 820 *(bus_addr_t *)arg = segs[0].ds_addr; 821 } 822 823 /* 824 * Allocates a contiguous block of dma memory of the requested size and 825 * alignment. Due to limitations of the FreeBSD dma subsystem as of 20071217, 826 * allocations greater than 4096 may fail. Hence if the requested alignment is 827 * greater we allocate 'alignment' size extra memory and shift the vaddr and 828 * paddr after the dma load. This bypasses the problem at the cost of a little 829 * more memory. 830 */ 831 static int 832 wpi_dma_contig_alloc(struct wpi_softc *sc, struct wpi_dma_info *dma, 833 void **kvap, bus_size_t size, bus_size_t alignment, int flags) 834 { 835 int error; 836 bus_size_t align; 837 bus_size_t reqsize; 838 839 DPRINTFN(WPI_DEBUG_DMA, 840 ("Size: %zd - alignment %zd\n", size, alignment)); 841 842 dma->size = size; 843 dma->tag = NULL; 844 845 if (alignment > 4096) { 846 align = PAGE_SIZE; 847 reqsize = size + alignment; 848 } else { 849 align = alignment; 850 reqsize = size; 851 } 852 error = bus_dma_tag_create(dma->tag, align, 853 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, 854 NULL, NULL, reqsize, 855 1, reqsize, flags, 856 &dma->tag); 857 if (error != 0) { 858 device_printf(sc->sc_dev, 859 "could not create shared page DMA tag\n"); 860 goto fail; 861 } 862 error = bus_dmamem_alloc(dma->tag, (void **)&dma->vaddr_start, 863 flags | BUS_DMA_ZERO, &dma->map); 864 if (error != 0) { 865 device_printf(sc->sc_dev, 866 "could not allocate shared page DMA memory\n"); 867 goto fail; 868 } 869 870 error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr_start, 871 reqsize, wpi_dma_map_addr, &dma->paddr_start, flags); 872 873 /* Save the original pointers so we can free all the memory */ 874 dma->paddr = dma->paddr_start; 875 dma->vaddr = dma->vaddr_start; 876 877 /* 878 * Check the alignment and increment by 4096 until we get the 879 * requested alignment. Fail if can't obtain the alignment 880 * we requested. 881 */ 882 if ((dma->paddr & (alignment -1 )) != 0) { 883 int i; 884 885 for (i = 0; i < alignment / 4096; i++) { 886 if ((dma->paddr & (alignment - 1 )) == 0) 887 break; 888 dma->paddr += 4096; 889 dma->vaddr += 4096; 890 } 891 if (i == alignment / 4096) { 892 device_printf(sc->sc_dev, 893 "alignment requirement was not satisfied\n"); 894 goto fail; 895 } 896 } 897 898 if (error != 0) { 899 device_printf(sc->sc_dev, 900 "could not load shared page DMA map\n"); 901 goto fail; 902 } 903 904 if (kvap != NULL) 905 *kvap = dma->vaddr; 906 907 return 0; 908 909 fail: 910 wpi_dma_contig_free(dma); 911 return error; 912 } 913 914 static void 915 wpi_dma_contig_free(struct wpi_dma_info *dma) 916 { 917 if (dma->tag) { 918 if (dma->map != NULL) { 919 if (dma->paddr_start != 0) { 920 bus_dmamap_sync(dma->tag, dma->map, 921 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 922 bus_dmamap_unload(dma->tag, dma->map); 923 } 924 bus_dmamem_free(dma->tag, &dma->vaddr_start, dma->map); 925 } 926 bus_dma_tag_destroy(dma->tag); 927 } 928 } 929 930 /* 931 * Allocate a shared page between host and NIC. 932 */ 933 static int 934 wpi_alloc_shared(struct wpi_softc *sc) 935 { 936 int error; 937 938 error = wpi_dma_contig_alloc(sc, &sc->shared_dma, 939 (void **)&sc->shared, sizeof (struct wpi_shared), 940 PAGE_SIZE, 941 BUS_DMA_NOWAIT); 942 943 if (error != 0) { 944 device_printf(sc->sc_dev, 945 "could not allocate shared area DMA memory\n"); 946 } 947 948 return error; 949 } 950 951 static void 952 wpi_free_shared(struct wpi_softc *sc) 953 { 954 wpi_dma_contig_free(&sc->shared_dma); 955 } 956 957 static int 958 wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 959 { 960 961 int i, error; 962 963 ring->cur = 0; 964 965 error = wpi_dma_contig_alloc(sc, &ring->desc_dma, 966 (void **)&ring->desc, WPI_RX_RING_COUNT * sizeof (uint32_t), 967 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 968 969 if (error != 0) { 970 device_printf(sc->sc_dev, 971 "%s: could not allocate rx ring DMA memory, error %d\n", 972 __func__, error); 973 goto fail; 974 } 975 976 error = bus_dma_tag_create(ring->data_dmat, 1, 0, 977 BUS_SPACE_MAXADDR_32BIT, 978 BUS_SPACE_MAXADDR, NULL, NULL, MJUMPAGESIZE, 1, 979 MJUMPAGESIZE, BUS_DMA_NOWAIT, &ring->data_dmat); 980 if (error != 0) { 981 device_printf(sc->sc_dev, 982 "%s: bus_dma_tag_create_failed, error %d\n", 983 __func__, error); 984 goto fail; 985 } 986 987 /* 988 * Setup Rx buffers. 989 */ 990 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 991 struct wpi_rx_data *data = &ring->data[i]; 992 struct mbuf *m; 993 bus_addr_t paddr; 994 995 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 996 if (error != 0) { 997 device_printf(sc->sc_dev, 998 "%s: bus_dmamap_create failed, error %d\n", 999 __func__, error); 1000 goto fail; 1001 } 1002 m = m_getjcl(MB_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE); 1003 if (m == NULL) { 1004 device_printf(sc->sc_dev, 1005 "%s: could not allocate rx mbuf\n", __func__); 1006 error = ENOMEM; 1007 goto fail; 1008 } 1009 /* map page */ 1010 error = bus_dmamap_load(ring->data_dmat, data->map, 1011 mtod(m, caddr_t), MJUMPAGESIZE, 1012 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT); 1013 if (error != 0 && error != EFBIG) { 1014 device_printf(sc->sc_dev, 1015 "%s: bus_dmamap_load failed, error %d\n", 1016 __func__, error); 1017 m_freem(m); 1018 error = ENOMEM; /* XXX unique code */ 1019 goto fail; 1020 } 1021 bus_dmamap_sync(ring->data_dmat, data->map, 1022 BUS_DMASYNC_PREWRITE); 1023 1024 data->m = m; 1025 ring->desc[i] = htole32(paddr); 1026 } 1027 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 1028 BUS_DMASYNC_PREWRITE); 1029 return 0; 1030 fail: 1031 wpi_free_rx_ring(sc, ring); 1032 return error; 1033 } 1034 1035 static void 1036 wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 1037 { 1038 int ntries; 1039 1040 wpi_mem_lock(sc); 1041 1042 WPI_WRITE(sc, WPI_RX_CONFIG, 0); 1043 1044 for (ntries = 0; ntries < 100; ntries++) { 1045 if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE) 1046 break; 1047 DELAY(10); 1048 } 1049 1050 wpi_mem_unlock(sc); 1051 1052 #ifdef WPI_DEBUG 1053 if (ntries == 100 && wpi_debug > 0) 1054 device_printf(sc->sc_dev, "timeout resetting Rx ring\n"); 1055 #endif 1056 1057 ring->cur = 0; 1058 } 1059 1060 static void 1061 wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 1062 { 1063 int i; 1064 1065 wpi_dma_contig_free(&ring->desc_dma); 1066 1067 for (i = 0; i < WPI_RX_RING_COUNT; i++) 1068 if (ring->data[i].m != NULL) 1069 m_freem(ring->data[i].m); 1070 } 1071 1072 static int 1073 wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int count, 1074 int qid) 1075 { 1076 struct wpi_tx_data *data; 1077 int i, error; 1078 1079 ring->qid = qid; 1080 ring->count = count; 1081 ring->queued = 0; 1082 ring->cur = 0; 1083 ring->data = NULL; 1084 1085 error = wpi_dma_contig_alloc(sc, &ring->desc_dma, 1086 (void **)&ring->desc, count * sizeof (struct wpi_tx_desc), 1087 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 1088 1089 if (error != 0) { 1090 device_printf(sc->sc_dev, "could not allocate tx dma memory\n"); 1091 goto fail; 1092 } 1093 1094 /* update shared page with ring's base address */ 1095 sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr); 1096 1097 error = wpi_dma_contig_alloc(sc, &ring->cmd_dma, (void **)&ring->cmd, 1098 count * sizeof (struct wpi_tx_cmd), WPI_RING_DMA_ALIGN, 1099 BUS_DMA_NOWAIT); 1100 1101 if (error != 0) { 1102 device_printf(sc->sc_dev, 1103 "could not allocate tx command DMA memory\n"); 1104 goto fail; 1105 } 1106 1107 ring->data = kmalloc(count * sizeof (struct wpi_tx_data), M_DEVBUF, 1108 M_INTWAIT | M_ZERO); 1109 if (ring->data == NULL) { 1110 device_printf(sc->sc_dev, 1111 "could not allocate tx data slots\n"); 1112 goto fail; 1113 } 1114 1115 error = bus_dma_tag_create(ring->data_dmat, 1, 0, 1116 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MJUMPAGESIZE, 1117 WPI_MAX_SCATTER - 1, MJUMPAGESIZE, BUS_DMA_NOWAIT, 1118 &ring->data_dmat); 1119 if (error != 0) { 1120 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 1121 goto fail; 1122 } 1123 1124 for (i = 0; i < count; i++) { 1125 data = &ring->data[i]; 1126 1127 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 1128 if (error != 0) { 1129 device_printf(sc->sc_dev, 1130 "could not create tx buf DMA map\n"); 1131 goto fail; 1132 } 1133 bus_dmamap_sync(ring->data_dmat, data->map, 1134 BUS_DMASYNC_PREWRITE); 1135 } 1136 1137 return 0; 1138 1139 fail: 1140 wpi_free_tx_ring(sc, ring); 1141 return error; 1142 } 1143 1144 static void 1145 wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 1146 { 1147 struct wpi_tx_data *data; 1148 int i, ntries; 1149 1150 wpi_mem_lock(sc); 1151 1152 WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0); 1153 for (ntries = 0; ntries < 100; ntries++) { 1154 if (WPI_READ(sc, WPI_TX_STATUS) & WPI_TX_IDLE(ring->qid)) 1155 break; 1156 DELAY(10); 1157 } 1158 #ifdef WPI_DEBUG 1159 if (ntries == 100 && wpi_debug > 0) 1160 device_printf(sc->sc_dev, "timeout resetting Tx ring %d\n", 1161 ring->qid); 1162 #endif 1163 wpi_mem_unlock(sc); 1164 1165 for (i = 0; i < ring->count; i++) { 1166 data = &ring->data[i]; 1167 1168 if (data->m != NULL) { 1169 bus_dmamap_unload(ring->data_dmat, data->map); 1170 m_freem(data->m); 1171 data->m = NULL; 1172 } 1173 } 1174 1175 ring->queued = 0; 1176 ring->cur = 0; 1177 } 1178 1179 static void 1180 wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 1181 { 1182 struct wpi_tx_data *data; 1183 int i; 1184 1185 wpi_dma_contig_free(&ring->desc_dma); 1186 wpi_dma_contig_free(&ring->cmd_dma); 1187 1188 if (ring->data != NULL) { 1189 for (i = 0; i < ring->count; i++) { 1190 data = &ring->data[i]; 1191 1192 if (data->m != NULL) { 1193 bus_dmamap_sync(ring->data_dmat, data->map, 1194 BUS_DMASYNC_POSTWRITE); 1195 bus_dmamap_unload(ring->data_dmat, data->map); 1196 m_freem(data->m); 1197 data->m = NULL; 1198 } 1199 } 1200 kfree(ring->data, M_DEVBUF); 1201 } 1202 1203 if (ring->data_dmat != NULL) 1204 bus_dma_tag_destroy(ring->data_dmat); 1205 } 1206 1207 static int 1208 wpi_shutdown(device_t dev) 1209 { 1210 struct wpi_softc *sc; 1211 1212 wlan_serialize_enter(); 1213 sc = device_get_softc(dev); 1214 wpi_stop_locked(sc); 1215 wpi_unload_firmware(sc); 1216 wlan_serialize_exit(); 1217 1218 return 0; 1219 } 1220 1221 static int 1222 wpi_suspend(device_t dev) 1223 { 1224 struct wpi_softc *sc; 1225 1226 wlan_serialize_enter(); 1227 sc = device_get_softc(dev); 1228 wpi_stop(sc); 1229 wlan_serialize_exit(); 1230 return 0; 1231 } 1232 1233 static int 1234 wpi_resume(device_t dev) 1235 { 1236 struct wpi_softc *sc; 1237 struct ifnet *ifp; 1238 1239 wlan_serialize_enter(); 1240 sc = device_get_softc(dev); 1241 ifp = sc->sc_ifp; 1242 pci_write_config(dev, 0x41, 0, 1); 1243 1244 if (ifp->if_flags & IFF_UP) { 1245 wpi_init(ifp->if_softc); 1246 if (ifp->if_flags & IFF_RUNNING) 1247 if_devstart(ifp); 1248 } 1249 wlan_serialize_exit(); 1250 return 0; 1251 } 1252 1253 /* ARGSUSED */ 1254 static struct ieee80211_node * 1255 wpi_node_alloc(struct ieee80211vap *vap __unused, 1256 const uint8_t mac[IEEE80211_ADDR_LEN] __unused) 1257 { 1258 struct wpi_node *wn; 1259 1260 wn = kmalloc(sizeof (struct wpi_node), M_80211_NODE, M_INTWAIT | M_ZERO); 1261 1262 return &wn->ni; 1263 } 1264 1265 /** 1266 * Called by net80211 when ever there is a change to 80211 state machine 1267 */ 1268 static int 1269 wpi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 1270 { 1271 struct wpi_vap *wvp = WPI_VAP(vap); 1272 struct ieee80211com *ic = vap->iv_ic; 1273 struct ifnet *ifp = ic->ic_ifp; 1274 struct wpi_softc *sc = ifp->if_softc; 1275 int error; 1276 1277 DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__, 1278 ieee80211_state_name[vap->iv_state], 1279 ieee80211_state_name[nstate], sc->flags)); 1280 1281 if (nstate == IEEE80211_S_AUTH) { 1282 /* The node must be registered in the firmware before auth */ 1283 error = wpi_auth(sc, vap); 1284 if (error != 0) { 1285 device_printf(sc->sc_dev, 1286 "%s: could not move to auth state, error %d\n", 1287 __func__, error); 1288 } 1289 } 1290 if (nstate == IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_RUN) { 1291 error = wpi_run(sc, vap); 1292 if (error != 0) { 1293 device_printf(sc->sc_dev, 1294 "%s: could not move to run state, error %d\n", 1295 __func__, error); 1296 } 1297 } 1298 if (nstate == IEEE80211_S_RUN) { 1299 /* RUN -> RUN transition; just restart the timers */ 1300 wpi_calib_timeout_callout(sc); 1301 /* XXX split out rate control timer */ 1302 } 1303 return wvp->newstate(vap, nstate, arg); 1304 } 1305 1306 /* 1307 * Grab exclusive access to NIC memory. 1308 */ 1309 static void 1310 wpi_mem_lock(struct wpi_softc *sc) 1311 { 1312 int ntries; 1313 uint32_t tmp; 1314 1315 tmp = WPI_READ(sc, WPI_GPIO_CTL); 1316 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC); 1317 1318 /* spin until we actually get the lock */ 1319 for (ntries = 0; ntries < 100; ntries++) { 1320 if ((WPI_READ(sc, WPI_GPIO_CTL) & 1321 (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK) 1322 break; 1323 DELAY(10); 1324 } 1325 if (ntries == 100) 1326 device_printf(sc->sc_dev, "could not lock memory\n"); 1327 } 1328 1329 /* 1330 * Release lock on NIC memory. 1331 */ 1332 static void 1333 wpi_mem_unlock(struct wpi_softc *sc) 1334 { 1335 uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL); 1336 WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC); 1337 } 1338 1339 static uint32_t 1340 wpi_mem_read(struct wpi_softc *sc, uint16_t addr) 1341 { 1342 WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr); 1343 return WPI_READ(sc, WPI_READ_MEM_DATA); 1344 } 1345 1346 static void 1347 wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data) 1348 { 1349 WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr); 1350 WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data); 1351 } 1352 1353 static void 1354 wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr, 1355 const uint32_t *data, int wlen) 1356 { 1357 for (; wlen > 0; wlen--, data++, addr+=4) 1358 wpi_mem_write(sc, addr, *data); 1359 } 1360 1361 /* 1362 * Read data from the EEPROM. We access EEPROM through the MAC instead of 1363 * using the traditional bit-bang method. Data is read up until len bytes have 1364 * been obtained. 1365 */ 1366 static uint16_t 1367 wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len) 1368 { 1369 int ntries; 1370 uint32_t val; 1371 uint8_t *out = data; 1372 1373 wpi_mem_lock(sc); 1374 1375 for (; len > 0; len -= 2, addr++) { 1376 WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2); 1377 1378 for (ntries = 0; ntries < 10; ntries++) { 1379 if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) & WPI_EEPROM_READY) 1380 break; 1381 DELAY(5); 1382 } 1383 1384 if (ntries == 10) { 1385 device_printf(sc->sc_dev, "could not read EEPROM\n"); 1386 return ETIMEDOUT; 1387 } 1388 1389 *out++= val >> 16; 1390 if (len > 1) 1391 *out ++= val >> 24; 1392 } 1393 1394 wpi_mem_unlock(sc); 1395 1396 return 0; 1397 } 1398 1399 /* 1400 * The firmware text and data segments are transferred to the NIC using DMA. 1401 * The driver just copies the firmware into DMA-safe memory and tells the NIC 1402 * where to find it. Once the NIC has copied the firmware into its internal 1403 * memory, we can free our local copy in the driver. 1404 */ 1405 static int 1406 wpi_load_microcode(struct wpi_softc *sc, const uint8_t *fw, int size) 1407 { 1408 int error, ntries; 1409 1410 DPRINTFN(WPI_DEBUG_HW,("Loading microcode size 0x%x\n", size)); 1411 1412 size /= sizeof(uint32_t); 1413 1414 wpi_mem_lock(sc); 1415 1416 wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE, 1417 (const uint32_t *)fw, size); 1418 1419 wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0); 1420 wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT); 1421 wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size); 1422 1423 /* run microcode */ 1424 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN); 1425 1426 /* wait while the adapter is busy copying the firmware */ 1427 for (error = 0, ntries = 0; ntries < 1000; ntries++) { 1428 uint32_t status = WPI_READ(sc, WPI_TX_STATUS); 1429 DPRINTFN(WPI_DEBUG_HW, 1430 ("firmware status=0x%x, val=0x%x, result=0x%x\n", status, 1431 WPI_TX_IDLE(6), status & WPI_TX_IDLE(6))); 1432 if (status & WPI_TX_IDLE(6)) { 1433 DPRINTFN(WPI_DEBUG_HW, 1434 ("Status Match! - ntries = %d\n", ntries)); 1435 break; 1436 } 1437 DELAY(10); 1438 } 1439 if (ntries == 1000) { 1440 device_printf(sc->sc_dev, "timeout transferring firmware\n"); 1441 error = ETIMEDOUT; 1442 } 1443 1444 /* start the microcode executing */ 1445 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE); 1446 1447 wpi_mem_unlock(sc); 1448 1449 return (error); 1450 } 1451 1452 static void 1453 wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, 1454 struct wpi_rx_data *data) 1455 { 1456 struct ifnet *ifp = sc->sc_ifp; 1457 struct ieee80211com *ic = ifp->if_l2com; 1458 struct wpi_rx_ring *ring = &sc->rxq; 1459 struct wpi_rx_stat *stat; 1460 struct wpi_rx_head *head; 1461 struct wpi_rx_tail *tail; 1462 struct ieee80211_node *ni; 1463 struct mbuf *m, *mnew; 1464 bus_addr_t paddr; 1465 int error; 1466 1467 stat = (struct wpi_rx_stat *)(desc + 1); 1468 1469 if (stat->len > WPI_STAT_MAXLEN) { 1470 device_printf(sc->sc_dev, "invalid rx statistic header\n"); 1471 IFNET_STAT_INC(ifp, ierrors, 1); 1472 return; 1473 } 1474 1475 head = (struct wpi_rx_head *)((caddr_t)(stat + 1) + stat->len); 1476 tail = (struct wpi_rx_tail *)((caddr_t)(head + 1) + le16toh(head->len)); 1477 1478 DPRINTFN(WPI_DEBUG_RX, ("rx intr: idx=%d len=%d stat len=%d rssi=%d " 1479 "rate=%x chan=%d tstamp=%ju\n", ring->cur, le32toh(desc->len), 1480 le16toh(head->len), (int8_t)stat->rssi, head->rate, head->chan, 1481 (uintmax_t)le64toh(tail->tstamp))); 1482 1483 /* discard Rx frames with bad CRC early */ 1484 if ((le32toh(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) { 1485 DPRINTFN(WPI_DEBUG_RX, ("%s: rx flags error %x\n", __func__, 1486 le32toh(tail->flags))); 1487 IFNET_STAT_INC(ifp, ierrors, 1); 1488 return; 1489 } 1490 if (le16toh(head->len) < sizeof (struct ieee80211_frame)) { 1491 DPRINTFN(WPI_DEBUG_RX, ("%s: frame too short: %d\n", __func__, 1492 le16toh(head->len))); 1493 IFNET_STAT_INC(ifp, ierrors, 1); 1494 return; 1495 } 1496 1497 /* XXX don't need mbuf, just dma buffer */ 1498 mnew = m_getjcl(MB_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE); 1499 if (mnew == NULL) { 1500 DPRINTFN(WPI_DEBUG_RX, ("%s: no mbuf to restock ring\n", 1501 __func__)); 1502 IFNET_STAT_INC(ifp, ierrors, 1); 1503 return; 1504 } 1505 error = bus_dmamap_load(ring->data_dmat, data->map, 1506 mtod(mnew, caddr_t), MJUMPAGESIZE, 1507 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT); 1508 if (error != 0 && error != EFBIG) { 1509 device_printf(sc->sc_dev, 1510 "%s: bus_dmamap_load failed, error %d\n", __func__, error); 1511 m_freem(mnew); 1512 IFNET_STAT_INC(ifp, ierrors, 1); 1513 return; 1514 } 1515 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1516 1517 /* finalize mbuf and swap in new one */ 1518 m = data->m; 1519 m->m_pkthdr.rcvif = ifp; 1520 m->m_data = (caddr_t)(head + 1); 1521 m->m_pkthdr.len = m->m_len = le16toh(head->len); 1522 1523 data->m = mnew; 1524 /* update Rx descriptor */ 1525 ring->desc[ring->cur] = htole32(paddr); 1526 1527 if (ieee80211_radiotap_active(ic)) { 1528 struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap; 1529 1530 tap->wr_flags = 0; 1531 tap->wr_chan_freq = 1532 htole16(ic->ic_channels[head->chan].ic_freq); 1533 tap->wr_chan_flags = 1534 htole16(ic->ic_channels[head->chan].ic_flags); 1535 tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET); 1536 tap->wr_dbm_antnoise = (int8_t)le16toh(stat->noise); 1537 tap->wr_tsft = tail->tstamp; 1538 tap->wr_antenna = (le16toh(head->flags) >> 4) & 0xf; 1539 switch (head->rate) { 1540 /* CCK rates */ 1541 case 10: tap->wr_rate = 2; break; 1542 case 20: tap->wr_rate = 4; break; 1543 case 55: tap->wr_rate = 11; break; 1544 case 110: tap->wr_rate = 22; break; 1545 /* OFDM rates */ 1546 case 0xd: tap->wr_rate = 12; break; 1547 case 0xf: tap->wr_rate = 18; break; 1548 case 0x5: tap->wr_rate = 24; break; 1549 case 0x7: tap->wr_rate = 36; break; 1550 case 0x9: tap->wr_rate = 48; break; 1551 case 0xb: tap->wr_rate = 72; break; 1552 case 0x1: tap->wr_rate = 96; break; 1553 case 0x3: tap->wr_rate = 108; break; 1554 /* unknown rate: should not happen */ 1555 default: tap->wr_rate = 0; 1556 } 1557 if (le16toh(head->flags) & 0x4) 1558 tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; 1559 } 1560 1561 ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *)); 1562 if (ni != NULL) { 1563 (void) ieee80211_input(ni, m, stat->rssi, 0); 1564 ieee80211_free_node(ni); 1565 } else 1566 (void) ieee80211_input_all(ic, m, stat->rssi, 0); 1567 } 1568 1569 static void 1570 wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1571 { 1572 struct ifnet *ifp = sc->sc_ifp; 1573 struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3]; 1574 struct wpi_tx_data *txdata = &ring->data[desc->idx]; 1575 struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1); 1576 struct ieee80211_node *ni = txdata->ni; 1577 struct ieee80211vap *vap = ni->ni_vap; 1578 int retrycnt = 0; 1579 1580 DPRINTFN(WPI_DEBUG_TX, ("tx done: qid=%d idx=%d retries=%d nkill=%d " 1581 "rate=%x duration=%d status=%x\n", desc->qid, desc->idx, 1582 stat->ntries, stat->nkill, stat->rate, le32toh(stat->duration), 1583 le32toh(stat->status))); 1584 1585 /* 1586 * Update rate control statistics for the node. 1587 * XXX we should not count mgmt frames since they're always sent at 1588 * the lowest available bit-rate. 1589 * XXX frames w/o ACK shouldn't be used either 1590 */ 1591 if (stat->ntries > 0) { 1592 DPRINTFN(WPI_DEBUG_TX, ("%d retries\n", stat->ntries)); 1593 retrycnt = 1; 1594 } 1595 ieee80211_ratectl_tx_complete(vap, ni, IEEE80211_RATECTL_TX_SUCCESS, 1596 &retrycnt, NULL); 1597 1598 /* XXX oerrors should only count errors !maxtries */ 1599 if ((le32toh(stat->status) & 0xff) != 1) 1600 IFNET_STAT_INC(ifp, oerrors, 1); 1601 else 1602 IFNET_STAT_INC(ifp, opackets, 1); 1603 1604 bus_dmamap_sync(ring->data_dmat, txdata->map, BUS_DMASYNC_POSTWRITE); 1605 bus_dmamap_unload(ring->data_dmat, txdata->map); 1606 /* XXX handle M_TXCB? */ 1607 m_freem(txdata->m); 1608 txdata->m = NULL; 1609 ieee80211_free_node(txdata->ni); 1610 txdata->ni = NULL; 1611 1612 ring->queued--; 1613 1614 sc->sc_tx_timer = 0; 1615 ifq_clr_oactive(&ifp->if_snd); 1616 wpi_start_locked(ifp); 1617 } 1618 1619 static void 1620 wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1621 { 1622 struct wpi_tx_ring *ring = &sc->cmdq; 1623 struct wpi_tx_data *data; 1624 1625 DPRINTFN(WPI_DEBUG_CMD, ("cmd notification qid=%x idx=%d flags=%x " 1626 "type=%s len=%d\n", desc->qid, desc->idx, 1627 desc->flags, wpi_cmd_str(desc->type), 1628 le32toh(desc->len))); 1629 1630 if ((desc->qid & 7) != 4) 1631 return; /* not a command ack */ 1632 1633 data = &ring->data[desc->idx]; 1634 1635 /* if the command was mapped in a mbuf, free it */ 1636 if (data->m != NULL) { 1637 bus_dmamap_unload(ring->data_dmat, data->map); 1638 m_freem(data->m); 1639 data->m = NULL; 1640 } 1641 1642 sc->flags &= ~WPI_FLAG_BUSY; 1643 wakeup(&ring->cmd[desc->idx]); 1644 } 1645 1646 static void 1647 wpi_notif_intr(struct wpi_softc *sc) 1648 { 1649 struct ifnet *ifp = sc->sc_ifp; 1650 struct ieee80211com *ic = ifp->if_l2com; 1651 struct wpi_rx_desc *desc; 1652 struct wpi_rx_data *data; 1653 uint32_t hw; 1654 1655 hw = le32toh(sc->shared->next); 1656 while (sc->rxq.cur != hw) { 1657 data = &sc->rxq.data[sc->rxq.cur]; 1658 desc = (void *)data->m->m_ext.ext_buf; 1659 1660 DPRINTFN(WPI_DEBUG_NOTIFY, 1661 ("notify qid=%x idx=%d flags=%x type=%d len=%d\n", 1662 desc->qid, 1663 desc->idx, 1664 desc->flags, 1665 desc->type, 1666 le32toh(desc->len))); 1667 1668 if (!(desc->qid & 0x80)) /* reply to a command */ 1669 wpi_cmd_intr(sc, desc); 1670 1671 switch (desc->type) { 1672 case WPI_RX_DONE: 1673 /* a 802.11 frame was received */ 1674 wpi_rx_intr(sc, desc, data); 1675 break; 1676 1677 case WPI_TX_DONE: 1678 /* a 802.11 frame has been transmitted */ 1679 wpi_tx_intr(sc, desc); 1680 break; 1681 1682 case WPI_UC_READY: 1683 { 1684 struct wpi_ucode_info *uc = 1685 (struct wpi_ucode_info *)(desc + 1); 1686 1687 /* the microcontroller is ready */ 1688 DPRINTF(("microcode alive notification version %x " 1689 "alive %x\n", le32toh(uc->version), 1690 le32toh(uc->valid))); 1691 1692 if (le32toh(uc->valid) != 1) { 1693 device_printf(sc->sc_dev, 1694 "microcontroller initialization failed\n"); 1695 wpi_stop_locked(sc); 1696 } 1697 break; 1698 } 1699 case WPI_STATE_CHANGED: 1700 { 1701 uint32_t *status = (uint32_t *)(desc + 1); 1702 1703 /* enabled/disabled notification */ 1704 DPRINTF(("state changed to %x\n", le32toh(*status))); 1705 1706 if (le32toh(*status) & 1) { 1707 device_printf(sc->sc_dev, 1708 "Radio transmitter is switched off\n"); 1709 sc->flags |= WPI_FLAG_HW_RADIO_OFF; 1710 ifp->if_flags &= ~IFF_RUNNING; 1711 /* Disable firmware commands */ 1712 WPI_WRITE(sc, WPI_UCODE_SET, WPI_DISABLE_CMD); 1713 } 1714 break; 1715 } 1716 case WPI_START_SCAN: 1717 { 1718 #ifdef WPI_DEBUG 1719 struct wpi_start_scan *scan = 1720 (struct wpi_start_scan *)(desc + 1); 1721 #endif 1722 1723 DPRINTFN(WPI_DEBUG_SCANNING, 1724 ("scanning channel %d status %x\n", 1725 scan->chan, le32toh(scan->status))); 1726 break; 1727 } 1728 case WPI_STOP_SCAN: 1729 { 1730 #ifdef WPI_DEBUG 1731 struct wpi_stop_scan *scan = 1732 (struct wpi_stop_scan *)(desc + 1); 1733 #endif 1734 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 1735 1736 DPRINTFN(WPI_DEBUG_SCANNING, 1737 ("scan finished nchan=%d status=%d chan=%d\n", 1738 scan->nchan, scan->status, scan->chan)); 1739 1740 sc->sc_scan_timer = 0; 1741 ieee80211_scan_next(vap); 1742 break; 1743 } 1744 case WPI_MISSED_BEACON: 1745 { 1746 struct wpi_missed_beacon *beacon = 1747 (struct wpi_missed_beacon *)(desc + 1); 1748 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 1749 1750 if (le32toh(beacon->consecutive) >= 1751 vap->iv_bmissthreshold) { 1752 DPRINTF(("Beacon miss: %u >= %u\n", 1753 le32toh(beacon->consecutive), 1754 vap->iv_bmissthreshold)); 1755 ieee80211_beacon_miss(ic); 1756 } 1757 break; 1758 } 1759 } 1760 1761 sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT; 1762 } 1763 1764 /* tell the firmware what we have processed */ 1765 hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1; 1766 WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7); 1767 } 1768 1769 static void 1770 wpi_intr(void *arg) 1771 { 1772 struct wpi_softc *sc = arg; 1773 uint32_t r; 1774 1775 r = WPI_READ(sc, WPI_INTR); 1776 if (r == 0 || r == 0xffffffff) { 1777 return; 1778 } 1779 1780 /* disable interrupts */ 1781 WPI_WRITE(sc, WPI_MASK, 0); 1782 /* ack interrupts */ 1783 WPI_WRITE(sc, WPI_INTR, r); 1784 1785 if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) { 1786 struct ifnet *ifp = sc->sc_ifp; 1787 struct ieee80211com *ic = ifp->if_l2com; 1788 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 1789 1790 device_printf(sc->sc_dev, "fatal firmware error\n"); 1791 DPRINTFN(6,("(%s)\n", (r & WPI_SW_ERROR) ? "(Software Error)" : 1792 "(Hardware Error)")); 1793 if (vap != NULL) 1794 ieee80211_cancel_scan(vap); 1795 ieee80211_runtask(ic, &sc->sc_restarttask); 1796 sc->flags &= ~WPI_FLAG_BUSY; 1797 return; 1798 } 1799 1800 if (r & WPI_RX_INTR) 1801 wpi_notif_intr(sc); 1802 1803 if (r & WPI_ALIVE_INTR) /* firmware initialized */ 1804 wakeup(sc); 1805 1806 /* re-enable interrupts */ 1807 if (sc->sc_ifp->if_flags & IFF_UP) 1808 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 1809 1810 } 1811 1812 static uint8_t 1813 wpi_plcp_signal(int rate) 1814 { 1815 switch (rate) { 1816 /* CCK rates (returned values are device-dependent) */ 1817 case 2: return 10; 1818 case 4: return 20; 1819 case 11: return 55; 1820 case 22: return 110; 1821 1822 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1823 /* R1-R4 (ral/ural is R4-R1) */ 1824 case 12: return 0xd; 1825 case 18: return 0xf; 1826 case 24: return 0x5; 1827 case 36: return 0x7; 1828 case 48: return 0x9; 1829 case 72: return 0xb; 1830 case 96: return 0x1; 1831 case 108: return 0x3; 1832 1833 /* unsupported rates (should not get there) */ 1834 default: return 0; 1835 } 1836 } 1837 1838 /* quickly determine if a given rate is CCK or OFDM */ 1839 #define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1840 1841 /* 1842 * Construct the data packet for a transmit buffer and acutally put 1843 * the buffer onto the transmit ring, kicking the card to process the 1844 * the buffer. 1845 */ 1846 static int 1847 wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, 1848 int ac) 1849 { 1850 struct ieee80211vap *vap = ni->ni_vap; 1851 struct ifnet *ifp = sc->sc_ifp; 1852 struct ieee80211com *ic = ifp->if_l2com; 1853 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1854 struct wpi_tx_ring *ring = &sc->txq[ac]; 1855 struct wpi_tx_desc *desc; 1856 struct wpi_tx_data *data; 1857 struct wpi_tx_cmd *cmd; 1858 struct wpi_cmd_data *tx; 1859 struct ieee80211_frame *wh; 1860 const struct ieee80211_txparam *tp; 1861 struct ieee80211_key *k; 1862 struct mbuf *mnew; 1863 int i, error, nsegs, rate, hdrlen, ismcast; 1864 bus_dma_segment_t segs[WPI_MAX_SCATTER]; 1865 1866 desc = &ring->desc[ring->cur]; 1867 data = &ring->data[ring->cur]; 1868 1869 wh = mtod(m0, struct ieee80211_frame *); 1870 1871 hdrlen = ieee80211_hdrsize(wh); 1872 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1873 1874 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1875 k = ieee80211_crypto_encap(ni, m0); 1876 if (k == NULL) { 1877 m_freem(m0); 1878 return ENOBUFS; 1879 } 1880 /* packet header may have moved, reset our local pointer */ 1881 wh = mtod(m0, struct ieee80211_frame *); 1882 } 1883 1884 cmd = &ring->cmd[ring->cur]; 1885 cmd->code = WPI_CMD_TX_DATA; 1886 cmd->flags = 0; 1887 cmd->qid = ring->qid; 1888 cmd->idx = ring->cur; 1889 1890 tx = (struct wpi_cmd_data *)cmd->data; 1891 tx->flags = htole32(WPI_TX_AUTO_SEQ); 1892 tx->timeout = htole16(0); 1893 tx->ofdm_mask = 0xff; 1894 tx->cck_mask = 0x0f; 1895 tx->lifetime = htole32(WPI_LIFETIME_INFINITE); 1896 tx->id = ismcast ? WPI_ID_BROADCAST : WPI_ID_BSS; 1897 tx->len = htole16(m0->m_pkthdr.len); 1898 1899 if (!ismcast) { 1900 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0 || 1901 !cap->cap_wmeParams[ac].wmep_noackPolicy) 1902 tx->flags |= htole32(WPI_TX_NEED_ACK); 1903 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold) { 1904 tx->flags |= htole32(WPI_TX_NEED_RTS|WPI_TX_FULL_TXOP); 1905 tx->rts_ntries = 7; 1906 } 1907 } 1908 /* pick a rate */ 1909 tp = &vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)]; 1910 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_MGT) { 1911 uint8_t subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1912 /* tell h/w to set timestamp in probe responses */ 1913 if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1914 tx->flags |= htole32(WPI_TX_INSERT_TSTAMP); 1915 if (subtype == IEEE80211_FC0_SUBTYPE_ASSOC_REQ || 1916 subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) 1917 tx->timeout = htole16(3); 1918 else 1919 tx->timeout = htole16(2); 1920 rate = tp->mgmtrate; 1921 } else if (ismcast) { 1922 rate = tp->mcastrate; 1923 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) { 1924 rate = tp->ucastrate; 1925 } else { 1926 (void) ieee80211_ratectl_rate(ni, NULL, 0); 1927 rate = ni->ni_txrate; 1928 } 1929 tx->rate = wpi_plcp_signal(rate); 1930 1931 /* be very persistant at sending frames out */ 1932 #if 0 1933 tx->data_ntries = tp->maxretry; 1934 #else 1935 tx->data_ntries = 30; /* XXX way too high */ 1936 #endif 1937 1938 if (ieee80211_radiotap_active_vap(vap)) { 1939 struct wpi_tx_radiotap_header *tap = &sc->sc_txtap; 1940 tap->wt_flags = 0; 1941 tap->wt_rate = rate; 1942 tap->wt_hwqueue = ac; 1943 if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1944 tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1945 1946 ieee80211_radiotap_tx(vap, m0); 1947 } 1948 1949 /* save and trim IEEE802.11 header */ 1950 m_copydata(m0, 0, hdrlen, (caddr_t)&tx->wh); 1951 m_adj(m0, hdrlen); 1952 1953 error = bus_dmamap_load_mbuf_segment(ring->data_dmat, data->map, m0, segs, 1954 1, &nsegs, BUS_DMA_NOWAIT); 1955 if (error != 0 && error != EFBIG) { 1956 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1957 error); 1958 m_freem(m0); 1959 return error; 1960 } 1961 if (error != 0) { 1962 /* XXX use m_collapse */ 1963 mnew = m_defrag(m0, MB_DONTWAIT); 1964 if (mnew == NULL) { 1965 device_printf(sc->sc_dev, 1966 "could not defragment mbuf\n"); 1967 m_freem(m0); 1968 return ENOBUFS; 1969 } 1970 m0 = mnew; 1971 1972 error = bus_dmamap_load_mbuf_segment(ring->data_dmat, data->map, 1973 m0, segs, 1, &nsegs, BUS_DMA_NOWAIT); 1974 if (error != 0) { 1975 device_printf(sc->sc_dev, 1976 "could not map mbuf (error %d)\n", error); 1977 m_freem(m0); 1978 return error; 1979 } 1980 } 1981 1982 data->m = m0; 1983 data->ni = ni; 1984 1985 DPRINTFN(WPI_DEBUG_TX, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n", 1986 ring->qid, ring->cur, m0->m_pkthdr.len, nsegs)); 1987 1988 /* first scatter/gather segment is used by the tx data command */ 1989 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 1990 (1 + nsegs) << 24); 1991 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 1992 ring->cur * sizeof (struct wpi_tx_cmd)); 1993 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data)); 1994 for (i = 1; i <= nsegs; i++) { 1995 desc->segs[i].addr = htole32(segs[i - 1].ds_addr); 1996 desc->segs[i].len = htole32(segs[i - 1].ds_len); 1997 } 1998 1999 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 2000 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 2001 BUS_DMASYNC_PREWRITE); 2002 2003 ring->queued++; 2004 2005 /* kick ring */ 2006 ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT; 2007 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2008 2009 return 0; 2010 } 2011 2012 /** 2013 * Process data waiting to be sent on the IFNET output queue 2014 */ 2015 static void 2016 wpi_start(struct ifnet *ifp, struct ifaltq_subque *ifsq) 2017 { 2018 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq); 2019 wpi_start_locked(ifp); 2020 } 2021 2022 static void 2023 wpi_start_locked(struct ifnet *ifp) 2024 { 2025 struct wpi_softc *sc = ifp->if_softc; 2026 struct ieee80211_node *ni; 2027 struct mbuf *m; 2028 int ac; 2029 2030 if ((ifp->if_flags & IFF_RUNNING) == 0) { 2031 ifq_purge(&ifp->if_snd); 2032 return; 2033 } 2034 2035 for (;;) { 2036 m = ifq_dequeue(&ifp->if_snd); 2037 if (m == NULL) 2038 break; 2039 ac = M_WME_GETAC(m); 2040 if (sc->txq[ac].queued > sc->txq[ac].count - 8) { 2041 /* there is no place left in this ring */ 2042 /* 2043 * XXX: we CANNOT do it this way. If something 2044 * is prepended already, this is going to blow. 2045 */ 2046 ifq_set_oactive(&ifp->if_snd); 2047 ifq_prepend(&ifp->if_snd, m); 2048 break; 2049 } 2050 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 2051 if (wpi_tx_data(sc, m, ni, ac) != 0) { 2052 ieee80211_free_node(ni); 2053 IFNET_STAT_INC(ifp, oerrors, 1); 2054 break; 2055 } 2056 sc->sc_tx_timer = 5; 2057 } 2058 } 2059 2060 static int 2061 wpi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2062 const struct ieee80211_bpf_params *params) 2063 { 2064 struct ieee80211com *ic = ni->ni_ic; 2065 struct ifnet *ifp = ic->ic_ifp; 2066 struct wpi_softc *sc = ifp->if_softc; 2067 2068 /* prevent management frames from being sent if we're not ready */ 2069 if (!(ifp->if_flags & IFF_RUNNING)) { 2070 m_freem(m); 2071 ieee80211_free_node(ni); 2072 return ENETDOWN; 2073 } 2074 2075 /* management frames go into ring 0 */ 2076 if (sc->txq[0].queued > sc->txq[0].count - 8) { 2077 ifq_set_oactive(&ifp->if_snd); 2078 m_freem(m); 2079 ieee80211_free_node(ni); 2080 return ENOBUFS; /* XXX */ 2081 } 2082 2083 IFNET_STAT_INC(ifp, opackets, 1); 2084 if (wpi_tx_data(sc, m, ni, 0) != 0) 2085 goto bad; 2086 sc->sc_tx_timer = 5; 2087 callout_reset(&sc->watchdog_to_callout, hz, wpi_watchdog_callout, sc); 2088 2089 return 0; 2090 bad: 2091 IFNET_STAT_INC(ifp, oerrors, 1); 2092 ieee80211_free_node(ni); 2093 return EIO; /* XXX */ 2094 } 2095 2096 static int 2097 wpi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cred) 2098 { 2099 struct wpi_softc *sc = ifp->if_softc; 2100 struct ieee80211com *ic = ifp->if_l2com; 2101 struct ifreq *ifr = (struct ifreq *) data; 2102 int error = 0, startall = 0; 2103 2104 switch (cmd) { 2105 case SIOCSIFFLAGS: 2106 if ((ifp->if_flags & IFF_UP)) { 2107 if (!(ifp->if_flags & IFF_RUNNING)) { 2108 wpi_init_locked(sc, 0); 2109 startall = 1; 2110 } 2111 } else if ((ifp->if_flags & IFF_RUNNING) || 2112 (sc->flags & WPI_FLAG_HW_RADIO_OFF)) 2113 wpi_stop_locked(sc); 2114 if (startall) 2115 ieee80211_start_all(ic); 2116 break; 2117 case SIOCGIFMEDIA: 2118 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd); 2119 break; 2120 case SIOCGIFADDR: 2121 error = ether_ioctl(ifp, cmd, data); 2122 break; 2123 default: 2124 error = EINVAL; 2125 break; 2126 } 2127 return error; 2128 } 2129 2130 /* 2131 * Extract various information from EEPROM. 2132 */ 2133 static void 2134 wpi_read_eeprom(struct wpi_softc *sc, uint8_t macaddr[IEEE80211_ADDR_LEN]) 2135 { 2136 int i; 2137 2138 /* read the hardware capabilities, revision and SKU type */ 2139 wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap,1); 2140 wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev,2); 2141 wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1); 2142 2143 /* read the regulatory domain */ 2144 wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, sc->domain, 4); 2145 2146 /* read in the hw MAC address */ 2147 wpi_read_prom_data(sc, WPI_EEPROM_MAC, macaddr, 6); 2148 2149 /* read the list of authorized channels */ 2150 for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++) 2151 wpi_read_eeprom_channels(sc,i); 2152 2153 /* read the power level calibration info for each group */ 2154 for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++) 2155 wpi_read_eeprom_group(sc,i); 2156 } 2157 2158 /* 2159 * Send a command to the firmware. 2160 */ 2161 static int 2162 wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async) 2163 { 2164 struct wpi_tx_ring *ring = &sc->cmdq; 2165 struct wpi_tx_desc *desc; 2166 struct wpi_tx_cmd *cmd; 2167 2168 #ifdef WPI_DEBUG 2169 if (!async) { 2170 wlan_assert_serialized(); 2171 } 2172 #endif 2173 2174 DPRINTFN(WPI_DEBUG_CMD,("wpi_cmd %d size %d async %d\n", code, size, 2175 async)); 2176 2177 if (sc->flags & WPI_FLAG_BUSY) { 2178 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n", 2179 __func__, code); 2180 return EAGAIN; 2181 } 2182 sc->flags|= WPI_FLAG_BUSY; 2183 2184 KASSERT(size <= sizeof cmd->data, ("command %d too large: %d bytes", 2185 code, size)); 2186 2187 desc = &ring->desc[ring->cur]; 2188 cmd = &ring->cmd[ring->cur]; 2189 2190 cmd->code = code; 2191 cmd->flags = 0; 2192 cmd->qid = ring->qid; 2193 cmd->idx = ring->cur; 2194 memcpy(cmd->data, buf, size); 2195 2196 desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24); 2197 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2198 ring->cur * sizeof (struct wpi_tx_cmd)); 2199 desc->segs[0].len = htole32(4 + size); 2200 2201 /* kick cmd ring */ 2202 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2203 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2204 2205 if (async) { 2206 sc->flags &= ~ WPI_FLAG_BUSY; 2207 return 0; 2208 } 2209 2210 return zsleep(cmd, &wlan_global_serializer, 0, "wpicmd", hz); 2211 } 2212 2213 static int 2214 wpi_wme_update(struct ieee80211com *ic) 2215 { 2216 #define WPI_EXP2(v) htole16((1 << (v)) - 1) 2217 #define WPI_USEC(v) htole16(IEEE80211_TXOP_TO_US(v)) 2218 struct wpi_softc *sc = ic->ic_ifp->if_softc; 2219 const struct wmeParams *wmep; 2220 struct wpi_wme_setup wme; 2221 int ac; 2222 2223 /* don't override default WME values if WME is not actually enabled */ 2224 if (!(ic->ic_flags & IEEE80211_F_WME)) 2225 return 0; 2226 2227 wme.flags = 0; 2228 for (ac = 0; ac < WME_NUM_AC; ac++) { 2229 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 2230 wme.ac[ac].aifsn = wmep->wmep_aifsn; 2231 wme.ac[ac].cwmin = WPI_EXP2(wmep->wmep_logcwmin); 2232 wme.ac[ac].cwmax = WPI_EXP2(wmep->wmep_logcwmax); 2233 wme.ac[ac].txop = WPI_USEC(wmep->wmep_txopLimit); 2234 2235 DPRINTF(("setting WME for queue %d aifsn=%d cwmin=%d cwmax=%d " 2236 "txop=%d\n", ac, wme.ac[ac].aifsn, wme.ac[ac].cwmin, 2237 wme.ac[ac].cwmax, wme.ac[ac].txop)); 2238 } 2239 return wpi_cmd(sc, WPI_CMD_SET_WME, &wme, sizeof wme, 1); 2240 #undef WPI_USEC 2241 #undef WPI_EXP2 2242 } 2243 2244 /* 2245 * Configure h/w multi-rate retries. 2246 */ 2247 static int 2248 wpi_mrr_setup(struct wpi_softc *sc) 2249 { 2250 struct ifnet *ifp = sc->sc_ifp; 2251 struct ieee80211com *ic = ifp->if_l2com; 2252 struct wpi_mrr_setup mrr; 2253 int i, error; 2254 2255 memset(&mrr, 0, sizeof (struct wpi_mrr_setup)); 2256 2257 /* CCK rates (not used with 802.11a) */ 2258 for (i = WPI_CCK1; i <= WPI_CCK11; i++) { 2259 mrr.rates[i].flags = 0; 2260 mrr.rates[i].signal = wpi_ridx_to_plcp[i]; 2261 /* fallback to the immediate lower CCK rate (if any) */ 2262 mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1; 2263 /* try one time at this rate before falling back to "next" */ 2264 mrr.rates[i].ntries = 1; 2265 } 2266 2267 /* OFDM rates (not used with 802.11b) */ 2268 for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) { 2269 mrr.rates[i].flags = 0; 2270 mrr.rates[i].signal = wpi_ridx_to_plcp[i]; 2271 /* fallback to the immediate lower OFDM rate (if any) */ 2272 /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */ 2273 mrr.rates[i].next = (i == WPI_OFDM6) ? 2274 ((ic->ic_curmode == IEEE80211_MODE_11A) ? 2275 WPI_OFDM6 : WPI_CCK2) : 2276 i - 1; 2277 /* try one time at this rate before falling back to "next" */ 2278 mrr.rates[i].ntries = 1; 2279 } 2280 2281 /* setup MRR for control frames */ 2282 mrr.which = htole32(WPI_MRR_CTL); 2283 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2284 if (error != 0) { 2285 device_printf(sc->sc_dev, 2286 "could not setup MRR for control frames\n"); 2287 return error; 2288 } 2289 2290 /* setup MRR for data frames */ 2291 mrr.which = htole32(WPI_MRR_DATA); 2292 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2293 if (error != 0) { 2294 device_printf(sc->sc_dev, 2295 "could not setup MRR for data frames\n"); 2296 return error; 2297 } 2298 2299 return 0; 2300 } 2301 2302 static void 2303 wpi_set_led(struct wpi_softc *sc, uint8_t which, uint8_t off, uint8_t on) 2304 { 2305 struct wpi_cmd_led led; 2306 2307 led.which = which; 2308 led.unit = htole32(100000); /* on/off in unit of 100ms */ 2309 led.off = off; 2310 led.on = on; 2311 2312 (void)wpi_cmd(sc, WPI_CMD_SET_LED, &led, sizeof led, 1); 2313 } 2314 2315 static void 2316 wpi_enable_tsf(struct wpi_softc *sc, struct ieee80211_node *ni) 2317 { 2318 struct wpi_cmd_tsf tsf; 2319 uint64_t val, mod; 2320 2321 memset(&tsf, 0, sizeof tsf); 2322 memcpy(&tsf.tstamp, ni->ni_tstamp.data, 8); 2323 tsf.bintval = htole16(ni->ni_intval); 2324 tsf.lintval = htole16(10); 2325 2326 /* compute remaining time until next beacon */ 2327 val = (uint64_t)ni->ni_intval * 1024; /* msec -> usec */ 2328 mod = le64toh(tsf.tstamp) % val; 2329 tsf.binitval = htole32((uint32_t)(val - mod)); 2330 2331 if (wpi_cmd(sc, WPI_CMD_TSF, &tsf, sizeof tsf, 1) != 0) 2332 device_printf(sc->sc_dev, "could not enable TSF\n"); 2333 } 2334 2335 #if 0 2336 /* 2337 * Build a beacon frame that the firmware will broadcast periodically in 2338 * IBSS or HostAP modes. 2339 */ 2340 static int 2341 wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni) 2342 { 2343 struct ifnet *ifp = sc->sc_ifp; 2344 struct ieee80211com *ic = ifp->if_l2com; 2345 struct wpi_tx_ring *ring = &sc->cmdq; 2346 struct wpi_tx_desc *desc; 2347 struct wpi_tx_data *data; 2348 struct wpi_tx_cmd *cmd; 2349 struct wpi_cmd_beacon *bcn; 2350 struct ieee80211_beacon_offsets bo; 2351 struct mbuf *m0; 2352 bus_addr_t physaddr; 2353 int error; 2354 2355 desc = &ring->desc[ring->cur]; 2356 data = &ring->data[ring->cur]; 2357 2358 m0 = ieee80211_beacon_alloc(ic, ni, &bo); 2359 if (m0 == NULL) { 2360 device_printf(sc->sc_dev, "could not allocate beacon frame\n"); 2361 return ENOMEM; 2362 } 2363 2364 cmd = &ring->cmd[ring->cur]; 2365 cmd->code = WPI_CMD_SET_BEACON; 2366 cmd->flags = 0; 2367 cmd->qid = ring->qid; 2368 cmd->idx = ring->cur; 2369 2370 bcn = (struct wpi_cmd_beacon *)cmd->data; 2371 memset(bcn, 0, sizeof (struct wpi_cmd_beacon)); 2372 bcn->id = WPI_ID_BROADCAST; 2373 bcn->ofdm_mask = 0xff; 2374 bcn->cck_mask = 0x0f; 2375 bcn->lifetime = htole32(WPI_LIFETIME_INFINITE); 2376 bcn->len = htole16(m0->m_pkthdr.len); 2377 bcn->rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2378 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2379 bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP); 2380 2381 /* save and trim IEEE802.11 header */ 2382 m_copydata(m0, 0, sizeof (struct ieee80211_frame), (caddr_t)&bcn->wh); 2383 m_adj(m0, sizeof (struct ieee80211_frame)); 2384 2385 /* assume beacon frame is contiguous */ 2386 error = bus_dmamap_load(ring->data_dmat, data->map, mtod(m0, void *), 2387 m0->m_pkthdr.len, wpi_dma_map_addr, &physaddr, 0); 2388 if (error != 0) { 2389 device_printf(sc->sc_dev, "could not map beacon\n"); 2390 m_freem(m0); 2391 return error; 2392 } 2393 2394 data->m = m0; 2395 2396 /* first scatter/gather segment is used by the beacon command */ 2397 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24); 2398 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2399 ring->cur * sizeof (struct wpi_tx_cmd)); 2400 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon)); 2401 desc->segs[1].addr = htole32(physaddr); 2402 desc->segs[1].len = htole32(m0->m_pkthdr.len); 2403 2404 /* kick cmd ring */ 2405 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2406 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2407 2408 return 0; 2409 } 2410 #endif 2411 2412 static int 2413 wpi_auth(struct wpi_softc *sc, struct ieee80211vap *vap) 2414 { 2415 struct ieee80211com *ic = vap->iv_ic; 2416 struct ieee80211_node *ni; 2417 struct wpi_node_info node; 2418 int error; 2419 2420 2421 /* update adapter's configuration */ 2422 sc->config.associd = 0; 2423 sc->config.filter &= ~htole32(WPI_FILTER_BSS); 2424 ni = ieee80211_ref_node(vap->iv_bss); 2425 IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid); 2426 sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan); 2427 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 2428 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2429 WPI_CONFIG_24GHZ); 2430 } 2431 if (IEEE80211_IS_CHAN_A(ni->ni_chan)) { 2432 sc->config.cck_mask = 0; 2433 sc->config.ofdm_mask = 0x15; 2434 } else if (IEEE80211_IS_CHAN_B(ni->ni_chan)) { 2435 sc->config.cck_mask = 0x03; 2436 sc->config.ofdm_mask = 0; 2437 } else { 2438 /* XXX assume 802.11b/g */ 2439 sc->config.cck_mask = 0x0f; 2440 sc->config.ofdm_mask = 0x15; 2441 } 2442 2443 DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan, 2444 sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask)); 2445 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2446 sizeof (struct wpi_config), 1); 2447 if (error != 0) { 2448 device_printf(sc->sc_dev, "could not configure\n"); 2449 ieee80211_free_node(ni); 2450 return error; 2451 } 2452 2453 /* configuration has changed, set Tx power accordingly */ 2454 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { 2455 device_printf(sc->sc_dev, "could not set Tx power\n"); 2456 ieee80211_free_node(ni); 2457 return error; 2458 } 2459 2460 /* add default node */ 2461 memset(&node, 0, sizeof node); 2462 IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid); 2463 ieee80211_free_node(ni); 2464 node.id = WPI_ID_BSS; 2465 node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2466 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2467 node.action = htole32(WPI_ACTION_SET_RATE); 2468 node.antenna = WPI_ANTENNA_BOTH; 2469 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1); 2470 if (error != 0) 2471 device_printf(sc->sc_dev, "could not add BSS node\n"); 2472 2473 return (error); 2474 } 2475 2476 static int 2477 wpi_run(struct wpi_softc *sc, struct ieee80211vap *vap) 2478 { 2479 struct ieee80211com *ic = vap->iv_ic; 2480 struct ieee80211_node *ni; 2481 int error; 2482 2483 if (vap->iv_opmode == IEEE80211_M_MONITOR) { 2484 /* link LED blinks while monitoring */ 2485 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 2486 return 0; 2487 } 2488 2489 ni = ieee80211_ref_node(vap->iv_bss); 2490 wpi_enable_tsf(sc, ni); 2491 2492 /* update adapter's configuration */ 2493 sc->config.associd = htole16(ni->ni_associd & ~0xc000); 2494 /* short preamble/slot time are negotiated when associating */ 2495 sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE | 2496 WPI_CONFIG_SHSLOT); 2497 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2498 sc->config.flags |= htole32(WPI_CONFIG_SHSLOT); 2499 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 2500 sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE); 2501 sc->config.filter |= htole32(WPI_FILTER_BSS); 2502 2503 /* XXX put somewhere HC_QOS_SUPPORT_ASSOC + HC_IBSS_START */ 2504 2505 DPRINTF(("config chan %d flags %x\n", sc->config.chan, 2506 sc->config.flags)); 2507 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, sizeof (struct 2508 wpi_config), 1); 2509 if (error != 0) { 2510 device_printf(sc->sc_dev, "could not update configuration\n"); 2511 ieee80211_free_node(ni); 2512 return error; 2513 } 2514 2515 error = wpi_set_txpower(sc, ni->ni_chan, 1); 2516 ieee80211_free_node(ni); 2517 if (error != 0) { 2518 device_printf(sc->sc_dev, "could set txpower\n"); 2519 return error; 2520 } 2521 2522 /* link LED always on while associated */ 2523 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 2524 2525 /* start automatic rate control timer */ 2526 callout_reset(&sc->calib_to_callout, 60*hz, wpi_calib_timeout_callout, sc); 2527 2528 return (error); 2529 } 2530 2531 /* 2532 * Send a scan request to the firmware. Since this command is huge, we map it 2533 * into a mbufcluster instead of using the pre-allocated set of commands. Note, 2534 * much of this code is similar to that in wpi_cmd but because we must manually 2535 * construct the probe & channels, we duplicate what's needed here. XXX In the 2536 * future, this function should be modified to use wpi_cmd to help cleanup the 2537 * code base. 2538 */ 2539 static int 2540 wpi_scan(struct wpi_softc *sc) 2541 { 2542 struct ifnet *ifp = sc->sc_ifp; 2543 struct ieee80211com *ic = ifp->if_l2com; 2544 struct ieee80211_scan_state *ss = ic->ic_scan; 2545 struct wpi_tx_ring *ring = &sc->cmdq; 2546 struct wpi_tx_desc *desc; 2547 struct wpi_tx_data *data; 2548 struct wpi_tx_cmd *cmd; 2549 struct wpi_scan_hdr *hdr; 2550 struct wpi_scan_chan *chan; 2551 struct ieee80211_frame *wh; 2552 struct ieee80211_rateset *rs; 2553 struct ieee80211_channel *c; 2554 enum ieee80211_phymode mode; 2555 uint8_t *frm; 2556 int nrates, pktlen, error, i, nssid; 2557 bus_addr_t physaddr; 2558 2559 desc = &ring->desc[ring->cur]; 2560 data = &ring->data[ring->cur]; 2561 2562 data->m = m_getjcl(MB_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE); 2563 if (data->m == NULL) { 2564 device_printf(sc->sc_dev, 2565 "could not allocate mbuf for scan command\n"); 2566 return ENOMEM; 2567 } 2568 2569 cmd = mtod(data->m, struct wpi_tx_cmd *); 2570 cmd->code = WPI_CMD_SCAN; 2571 cmd->flags = 0; 2572 cmd->qid = ring->qid; 2573 cmd->idx = ring->cur; 2574 2575 hdr = (struct wpi_scan_hdr *)cmd->data; 2576 memset(hdr, 0, sizeof(struct wpi_scan_hdr)); 2577 2578 /* 2579 * Move to the next channel if no packets are received within 5 msecs 2580 * after sending the probe request (this helps to reduce the duration 2581 * of active scans). 2582 */ 2583 hdr->quiet = htole16(5); 2584 hdr->threshold = htole16(1); 2585 2586 if (IEEE80211_IS_CHAN_A(ic->ic_curchan)) { 2587 /* send probe requests at 6Mbps */ 2588 hdr->tx.rate = wpi_ridx_to_plcp[WPI_OFDM6]; 2589 2590 /* Enable crc checking */ 2591 hdr->promotion = htole16(1); 2592 } else { 2593 hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO); 2594 /* send probe requests at 1Mbps */ 2595 hdr->tx.rate = wpi_ridx_to_plcp[WPI_CCK1]; 2596 } 2597 hdr->tx.id = WPI_ID_BROADCAST; 2598 hdr->tx.lifetime = htole32(WPI_LIFETIME_INFINITE); 2599 hdr->tx.flags = htole32(WPI_TX_AUTO_SEQ); 2600 2601 memset(hdr->scan_essids, 0, sizeof(hdr->scan_essids)); 2602 nssid = MIN(ss->ss_nssid, WPI_SCAN_MAX_ESSIDS); 2603 for (i = 0; i < nssid; i++) { 2604 hdr->scan_essids[i].id = IEEE80211_ELEMID_SSID; 2605 hdr->scan_essids[i].esslen = MIN(ss->ss_ssid[i].len, 32); 2606 memcpy(hdr->scan_essids[i].essid, ss->ss_ssid[i].ssid, 2607 hdr->scan_essids[i].esslen); 2608 #ifdef WPI_DEBUG 2609 if (wpi_debug & WPI_DEBUG_SCANNING) { 2610 kprintf("Scanning Essid: "); 2611 ieee80211_print_essid(hdr->scan_essids[i].essid, 2612 hdr->scan_essids[i].esslen); 2613 kprintf("\n"); 2614 } 2615 #endif 2616 } 2617 2618 /* 2619 * Build a probe request frame. Most of the following code is a 2620 * copy & paste of what is done in net80211. 2621 */ 2622 wh = (struct ieee80211_frame *)&hdr->scan_essids[4]; 2623 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 2624 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 2625 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2626 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 2627 IEEE80211_ADDR_COPY(wh->i_addr2, IF_LLADDR(ifp)); 2628 IEEE80211_ADDR_COPY(wh->i_addr3, ifp->if_broadcastaddr); 2629 *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */ 2630 *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */ 2631 2632 frm = (uint8_t *)(wh + 1); 2633 2634 /* add essid IE, the hardware will fill this in for us */ 2635 *frm++ = IEEE80211_ELEMID_SSID; 2636 *frm++ = 0; 2637 2638 mode = ieee80211_chan2mode(ic->ic_curchan); 2639 rs = &ic->ic_sup_rates[mode]; 2640 2641 /* add supported rates IE */ 2642 *frm++ = IEEE80211_ELEMID_RATES; 2643 nrates = rs->rs_nrates; 2644 if (nrates > IEEE80211_RATE_SIZE) 2645 nrates = IEEE80211_RATE_SIZE; 2646 *frm++ = nrates; 2647 memcpy(frm, rs->rs_rates, nrates); 2648 frm += nrates; 2649 2650 /* add supported xrates IE */ 2651 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 2652 nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 2653 *frm++ = IEEE80211_ELEMID_XRATES; 2654 *frm++ = nrates; 2655 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 2656 frm += nrates; 2657 } 2658 2659 /* setup length of probe request */ 2660 hdr->tx.len = htole16(frm - (uint8_t *)wh); 2661 2662 /* 2663 * Construct information about the channel that we 2664 * want to scan. The firmware expects this to be directly 2665 * after the scan probe request 2666 */ 2667 c = ic->ic_curchan; 2668 chan = (struct wpi_scan_chan *)frm; 2669 chan->chan = ieee80211_chan2ieee(ic, c); 2670 chan->flags = 0; 2671 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2672 chan->flags |= WPI_CHAN_ACTIVE; 2673 if (nssid != 0) 2674 chan->flags |= WPI_CHAN_DIRECT; 2675 } 2676 chan->gain_dsp = 0x6e; /* Default level */ 2677 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2678 chan->active = htole16(10); 2679 chan->passive = htole16(ss->ss_maxdwell); 2680 chan->gain_radio = 0x3b; 2681 } else { 2682 chan->active = htole16(20); 2683 chan->passive = htole16(ss->ss_maxdwell); 2684 chan->gain_radio = 0x28; 2685 } 2686 2687 DPRINTFN(WPI_DEBUG_SCANNING, 2688 ("Scanning %u Passive: %d\n", 2689 chan->chan, 2690 c->ic_flags & IEEE80211_CHAN_PASSIVE)); 2691 2692 hdr->nchan++; 2693 chan++; 2694 2695 frm += sizeof (struct wpi_scan_chan); 2696 #if 0 2697 // XXX All Channels.... 2698 for (c = &ic->ic_channels[1]; 2699 c <= &ic->ic_channels[IEEE80211_CHAN_MAX]; c++) { 2700 if ((c->ic_flags & ic->ic_curchan->ic_flags) != ic->ic_curchan->ic_flags) 2701 continue; 2702 2703 chan->chan = ieee80211_chan2ieee(ic, c); 2704 chan->flags = 0; 2705 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2706 chan->flags |= WPI_CHAN_ACTIVE; 2707 if (ic->ic_des_ssid[0].len != 0) 2708 chan->flags |= WPI_CHAN_DIRECT; 2709 } 2710 chan->gain_dsp = 0x6e; /* Default level */ 2711 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2712 chan->active = htole16(10); 2713 chan->passive = htole16(110); 2714 chan->gain_radio = 0x3b; 2715 } else { 2716 chan->active = htole16(20); 2717 chan->passive = htole16(120); 2718 chan->gain_radio = 0x28; 2719 } 2720 2721 DPRINTFN(WPI_DEBUG_SCANNING, 2722 ("Scanning %u Passive: %d\n", 2723 chan->chan, 2724 c->ic_flags & IEEE80211_CHAN_PASSIVE)); 2725 2726 hdr->nchan++; 2727 chan++; 2728 2729 frm += sizeof (struct wpi_scan_chan); 2730 } 2731 #endif 2732 2733 hdr->len = htole16(frm - (uint8_t *)hdr); 2734 pktlen = frm - (uint8_t *)cmd; 2735 2736 error = bus_dmamap_load(ring->data_dmat, data->map, cmd, pktlen, 2737 wpi_dma_map_addr, &physaddr, BUS_DMA_NOWAIT); 2738 if (error != 0) { 2739 device_printf(sc->sc_dev, "could not map scan command\n"); 2740 m_freem(data->m); 2741 data->m = NULL; 2742 return error; 2743 } 2744 2745 desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24); 2746 desc->segs[0].addr = htole32(physaddr); 2747 desc->segs[0].len = htole32(pktlen); 2748 2749 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 2750 BUS_DMASYNC_PREWRITE); 2751 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 2752 2753 /* kick cmd ring */ 2754 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2755 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2756 2757 sc->sc_scan_timer = 5; 2758 return 0; /* will be notified async. of failure/success */ 2759 } 2760 2761 /** 2762 * Configure the card to listen to a particular channel, this transisions the 2763 * card in to being able to receive frames from remote devices. 2764 */ 2765 static int 2766 wpi_config(struct wpi_softc *sc) 2767 { 2768 struct ifnet *ifp = sc->sc_ifp; 2769 struct ieee80211com *ic = ifp->if_l2com; 2770 struct wpi_power power; 2771 struct wpi_bluetooth bluetooth; 2772 struct wpi_node_info node; 2773 int error; 2774 2775 /* set power mode */ 2776 memset(&power, 0, sizeof power); 2777 power.flags = htole32(WPI_POWER_CAM|0x8); 2778 error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0); 2779 if (error != 0) { 2780 device_printf(sc->sc_dev, "could not set power mode\n"); 2781 return error; 2782 } 2783 2784 /* configure bluetooth coexistence */ 2785 memset(&bluetooth, 0, sizeof bluetooth); 2786 bluetooth.flags = 3; 2787 bluetooth.lead = 0xaa; 2788 bluetooth.kill = 1; 2789 error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth, 2790 0); 2791 if (error != 0) { 2792 device_printf(sc->sc_dev, 2793 "could not configure bluetooth coexistence\n"); 2794 return error; 2795 } 2796 2797 /* configure adapter */ 2798 memset(&sc->config, 0, sizeof (struct wpi_config)); 2799 IEEE80211_ADDR_COPY(sc->config.myaddr, IF_LLADDR(ifp)); 2800 /*set default channel*/ 2801 sc->config.chan = htole16(ieee80211_chan2ieee(ic, ic->ic_curchan)); 2802 sc->config.flags = htole32(WPI_CONFIG_TSF); 2803 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) { 2804 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2805 WPI_CONFIG_24GHZ); 2806 } 2807 sc->config.filter = 0; 2808 switch (ic->ic_opmode) { 2809 case IEEE80211_M_STA: 2810 case IEEE80211_M_WDS: /* No know setup, use STA for now */ 2811 sc->config.mode = WPI_MODE_STA; 2812 sc->config.filter |= htole32(WPI_FILTER_MULTICAST); 2813 break; 2814 case IEEE80211_M_IBSS: 2815 case IEEE80211_M_AHDEMO: 2816 sc->config.mode = WPI_MODE_IBSS; 2817 sc->config.filter |= htole32(WPI_FILTER_BEACON | 2818 WPI_FILTER_MULTICAST); 2819 break; 2820 case IEEE80211_M_HOSTAP: 2821 sc->config.mode = WPI_MODE_HOSTAP; 2822 break; 2823 case IEEE80211_M_MONITOR: 2824 sc->config.mode = WPI_MODE_MONITOR; 2825 sc->config.filter |= htole32(WPI_FILTER_MULTICAST | 2826 WPI_FILTER_CTL | WPI_FILTER_PROMISC); 2827 break; 2828 default: 2829 device_printf(sc->sc_dev, "unknown opmode %d\n", ic->ic_opmode); 2830 return EINVAL; 2831 } 2832 sc->config.cck_mask = 0x0f; /* not yet negotiated */ 2833 sc->config.ofdm_mask = 0xff; /* not yet negotiated */ 2834 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2835 sizeof (struct wpi_config), 0); 2836 if (error != 0) { 2837 device_printf(sc->sc_dev, "configure command failed\n"); 2838 return error; 2839 } 2840 2841 /* configuration has changed, set Tx power accordingly */ 2842 if ((error = wpi_set_txpower(sc, ic->ic_curchan, 0)) != 0) { 2843 device_printf(sc->sc_dev, "could not set Tx power\n"); 2844 return error; 2845 } 2846 2847 /* add broadcast node */ 2848 memset(&node, 0, sizeof node); 2849 IEEE80211_ADDR_COPY(node.bssid, ifp->if_broadcastaddr); 2850 node.id = WPI_ID_BROADCAST; 2851 node.rate = wpi_plcp_signal(2); 2852 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0); 2853 if (error != 0) { 2854 device_printf(sc->sc_dev, "could not add broadcast node\n"); 2855 return error; 2856 } 2857 2858 /* Setup rate scalling */ 2859 error = wpi_mrr_setup(sc); 2860 if (error != 0) { 2861 device_printf(sc->sc_dev, "could not setup MRR\n"); 2862 return error; 2863 } 2864 2865 return 0; 2866 } 2867 2868 static void 2869 wpi_stop_master(struct wpi_softc *sc) 2870 { 2871 uint32_t tmp; 2872 int ntries; 2873 2874 DPRINTFN(WPI_DEBUG_HW,("Disabling Firmware execution\n")); 2875 2876 tmp = WPI_READ(sc, WPI_RESET); 2877 WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER | WPI_NEVO_RESET); 2878 2879 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2880 if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP) 2881 return; /* already asleep */ 2882 2883 for (ntries = 0; ntries < 100; ntries++) { 2884 if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED) 2885 break; 2886 DELAY(10); 2887 } 2888 if (ntries == 100) { 2889 device_printf(sc->sc_dev, "timeout waiting for master\n"); 2890 } 2891 } 2892 2893 static int 2894 wpi_power_up(struct wpi_softc *sc) 2895 { 2896 uint32_t tmp; 2897 int ntries; 2898 2899 wpi_mem_lock(sc); 2900 tmp = wpi_mem_read(sc, WPI_MEM_POWER); 2901 wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000); 2902 wpi_mem_unlock(sc); 2903 2904 for (ntries = 0; ntries < 5000; ntries++) { 2905 if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED) 2906 break; 2907 DELAY(10); 2908 } 2909 if (ntries == 5000) { 2910 device_printf(sc->sc_dev, 2911 "timeout waiting for NIC to power up\n"); 2912 return ETIMEDOUT; 2913 } 2914 return 0; 2915 } 2916 2917 static int 2918 wpi_reset(struct wpi_softc *sc) 2919 { 2920 uint32_t tmp; 2921 int ntries; 2922 2923 DPRINTFN(WPI_DEBUG_HW, 2924 ("Resetting the card - clearing any uploaded firmware\n")); 2925 2926 /* clear any pending interrupts */ 2927 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 2928 2929 tmp = WPI_READ(sc, WPI_PLL_CTL); 2930 WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT); 2931 2932 tmp = WPI_READ(sc, WPI_CHICKEN); 2933 WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS); 2934 2935 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2936 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT); 2937 2938 /* wait for clock stabilization */ 2939 for (ntries = 0; ntries < 25000; ntries++) { 2940 if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK) 2941 break; 2942 DELAY(10); 2943 } 2944 if (ntries == 25000) { 2945 device_printf(sc->sc_dev, 2946 "timeout waiting for clock stabilization\n"); 2947 return ETIMEDOUT; 2948 } 2949 2950 /* initialize EEPROM */ 2951 tmp = WPI_READ(sc, WPI_EEPROM_STATUS); 2952 2953 if ((tmp & WPI_EEPROM_VERSION) == 0) { 2954 device_printf(sc->sc_dev, "EEPROM not found\n"); 2955 return EIO; 2956 } 2957 WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED); 2958 2959 return 0; 2960 } 2961 2962 static void 2963 wpi_hw_config(struct wpi_softc *sc) 2964 { 2965 uint32_t rev, hw; 2966 2967 /* voodoo from the Linux "driver".. */ 2968 hw = WPI_READ(sc, WPI_HWCONFIG); 2969 2970 rev = pci_read_config(sc->sc_dev, PCIR_REVID, 1); 2971 if ((rev & 0xc0) == 0x40) 2972 hw |= WPI_HW_ALM_MB; 2973 else if (!(rev & 0x80)) 2974 hw |= WPI_HW_ALM_MM; 2975 2976 if (sc->cap == 0x80) 2977 hw |= WPI_HW_SKU_MRC; 2978 2979 hw &= ~WPI_HW_REV_D; 2980 if ((le16toh(sc->rev) & 0xf0) == 0xd0) 2981 hw |= WPI_HW_REV_D; 2982 2983 if (sc->type > 1) 2984 hw |= WPI_HW_TYPE_B; 2985 2986 WPI_WRITE(sc, WPI_HWCONFIG, hw); 2987 } 2988 2989 static void 2990 wpi_rfkill_resume(struct wpi_softc *sc) 2991 { 2992 struct ifnet *ifp = sc->sc_ifp; 2993 struct ieee80211com *ic = ifp->if_l2com; 2994 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2995 int ntries; 2996 2997 /* enable firmware again */ 2998 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 2999 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3000 3001 /* wait for thermal sensors to calibrate */ 3002 for (ntries = 0; ntries < 1000; ntries++) { 3003 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3004 break; 3005 DELAY(10); 3006 } 3007 3008 if (ntries == 1000) { 3009 device_printf(sc->sc_dev, 3010 "timeout waiting for thermal calibration\n"); 3011 return; 3012 } 3013 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp)); 3014 3015 if (wpi_config(sc) != 0) { 3016 device_printf(sc->sc_dev, "device config failed\n"); 3017 return; 3018 } 3019 3020 ifq_clr_oactive(&ifp->if_snd); 3021 ifp->if_flags |= IFF_RUNNING; 3022 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3023 3024 if (vap != NULL) { 3025 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 3026 if (vap->iv_opmode != IEEE80211_M_MONITOR) { 3027 ieee80211_beacon_miss(ic); 3028 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 3029 } else 3030 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 3031 } else { 3032 ieee80211_scan_next(vap); 3033 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 3034 } 3035 } 3036 3037 callout_reset(&sc->watchdog_to_callout, hz, wpi_watchdog_callout, sc); 3038 } 3039 3040 static void 3041 wpi_init_locked(struct wpi_softc *sc, int force) 3042 { 3043 struct ifnet *ifp = sc->sc_ifp; 3044 uint32_t tmp; 3045 int ntries, qid; 3046 3047 wpi_stop_locked(sc); 3048 (void)wpi_reset(sc); 3049 3050 wpi_mem_lock(sc); 3051 wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00); 3052 DELAY(20); 3053 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 3054 wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800); 3055 wpi_mem_unlock(sc); 3056 3057 (void)wpi_power_up(sc); 3058 wpi_hw_config(sc); 3059 3060 /* init Rx ring */ 3061 wpi_mem_lock(sc); 3062 WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr); 3063 WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr + 3064 offsetof(struct wpi_shared, next)); 3065 WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7); 3066 WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010); 3067 wpi_mem_unlock(sc); 3068 3069 /* init Tx rings */ 3070 wpi_mem_lock(sc); 3071 wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */ 3072 wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */ 3073 wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */ 3074 wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000); 3075 wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002); 3076 wpi_mem_write(sc, WPI_MEM_MAGIC4, 4); 3077 wpi_mem_write(sc, WPI_MEM_MAGIC5, 5); 3078 3079 WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr); 3080 WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5); 3081 3082 for (qid = 0; qid < 6; qid++) { 3083 WPI_WRITE(sc, WPI_TX_CTL(qid), 0); 3084 WPI_WRITE(sc, WPI_TX_BASE(qid), 0); 3085 WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008); 3086 } 3087 wpi_mem_unlock(sc); 3088 3089 /* clear "radio off" and "disable command" bits (reversed logic) */ 3090 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3091 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3092 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3093 3094 /* clear any pending interrupts */ 3095 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 3096 3097 /* enable interrupts */ 3098 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 3099 3100 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3101 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3102 3103 if ((wpi_load_firmware(sc)) != 0) { 3104 device_printf(sc->sc_dev, 3105 "A problem occurred loading the firmware to the driver\n"); 3106 return; 3107 } 3108 3109 /* At this point the firmware is up and running. If the hardware 3110 * RF switch is turned off thermal calibration will fail, though 3111 * the card is still happy to continue to accept commands, catch 3112 * this case and schedule a task to watch for it to be turned on. 3113 */ 3114 wpi_mem_lock(sc); 3115 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF); 3116 wpi_mem_unlock(sc); 3117 3118 if (!(tmp & 0x1)) { 3119 sc->flags |= WPI_FLAG_HW_RADIO_OFF; 3120 device_printf(sc->sc_dev,"Radio Transmitter is switched off\n"); 3121 goto out; 3122 } 3123 3124 /* wait for thermal sensors to calibrate */ 3125 for (ntries = 0; ntries < 1000; ntries++) { 3126 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3127 break; 3128 DELAY(10); 3129 } 3130 3131 if (ntries == 1000) { 3132 device_printf(sc->sc_dev, 3133 "timeout waiting for thermal sensors calibration\n"); 3134 return; 3135 } 3136 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp)); 3137 3138 if (wpi_config(sc) != 0) { 3139 device_printf(sc->sc_dev, "device config failed\n"); 3140 return; 3141 } 3142 3143 ifq_clr_oactive(&ifp->if_snd); 3144 ifp->if_flags |= IFF_RUNNING; 3145 out: 3146 callout_reset(&sc->watchdog_to_callout, hz, wpi_watchdog_callout, sc); 3147 } 3148 3149 static void 3150 wpi_init(void *arg) 3151 { 3152 struct wpi_softc *sc = arg; 3153 struct ifnet *ifp = sc->sc_ifp; 3154 struct ieee80211com *ic = ifp->if_l2com; 3155 3156 wpi_init_locked(sc, 0); 3157 3158 if (ifp->if_flags & IFF_RUNNING) 3159 ieee80211_start_all(ic); /* start all vaps */ 3160 } 3161 3162 static void 3163 wpi_stop_locked(struct wpi_softc *sc) 3164 { 3165 struct ifnet *ifp = sc->sc_ifp; 3166 uint32_t tmp; 3167 int ac; 3168 3169 sc->sc_tx_timer = 0; 3170 sc->sc_scan_timer = 0; 3171 ifp->if_flags &= ~IFF_RUNNING; 3172 ifq_clr_oactive(&ifp->if_snd); 3173 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3174 callout_stop(&sc->watchdog_to_callout); 3175 callout_stop(&sc->calib_to_callout); 3176 3177 3178 /* disable interrupts */ 3179 WPI_WRITE(sc, WPI_MASK, 0); 3180 WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK); 3181 WPI_WRITE(sc, WPI_INTR_STATUS, 0xff); 3182 WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000); 3183 3184 wpi_mem_lock(sc); 3185 wpi_mem_write(sc, WPI_MEM_MODE, 0); 3186 wpi_mem_unlock(sc); 3187 3188 /* reset all Tx rings */ 3189 for (ac = 0; ac < 4; ac++) 3190 wpi_reset_tx_ring(sc, &sc->txq[ac]); 3191 wpi_reset_tx_ring(sc, &sc->cmdq); 3192 3193 /* reset Rx ring */ 3194 wpi_reset_rx_ring(sc, &sc->rxq); 3195 3196 wpi_mem_lock(sc); 3197 wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200); 3198 wpi_mem_unlock(sc); 3199 3200 DELAY(5); 3201 3202 wpi_stop_master(sc); 3203 3204 tmp = WPI_READ(sc, WPI_RESET); 3205 WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET); 3206 sc->flags &= ~WPI_FLAG_BUSY; 3207 } 3208 3209 static void 3210 wpi_stop(struct wpi_softc *sc) 3211 { 3212 wpi_stop_locked(sc); 3213 } 3214 3215 static void 3216 wpi_calib_timeout_callout(void *arg) 3217 { 3218 struct wpi_softc *sc = arg; 3219 struct ifnet *ifp = sc->sc_ifp; 3220 struct ieee80211com *ic = ifp->if_l2com; 3221 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3222 int temp; 3223 3224 if (vap->iv_state != IEEE80211_S_RUN) 3225 return; 3226 3227 /* update sensor data */ 3228 temp = (int)WPI_READ(sc, WPI_TEMPERATURE); 3229 DPRINTFN(WPI_DEBUG_TEMP,("Temp in calibration is: %d\n", temp)); 3230 3231 wpi_power_calibration(sc, temp); 3232 3233 callout_reset(&sc->calib_to_callout, 60*hz, wpi_calib_timeout_callout, sc); 3234 } 3235 3236 /* 3237 * This function is called periodically (every 60 seconds) to adjust output 3238 * power to temperature changes. 3239 */ 3240 static void 3241 wpi_power_calibration(struct wpi_softc *sc, int temp) 3242 { 3243 struct ifnet *ifp = sc->sc_ifp; 3244 struct ieee80211com *ic = ifp->if_l2com; 3245 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3246 3247 /* sanity-check read value */ 3248 if (temp < -260 || temp > 25) { 3249 /* this can't be correct, ignore */ 3250 DPRINTFN(WPI_DEBUG_TEMP, 3251 ("out-of-range temperature reported: %d\n", temp)); 3252 return; 3253 } 3254 3255 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d->%d\n", sc->temp, temp)); 3256 3257 /* adjust Tx power if need be */ 3258 if (abs(temp - sc->temp) <= 6) 3259 return; 3260 3261 sc->temp = temp; 3262 3263 if (wpi_set_txpower(sc, vap->iv_bss->ni_chan, 1) != 0) { 3264 /* just warn, too bad for the automatic calibration... */ 3265 device_printf(sc->sc_dev,"could not adjust Tx power\n"); 3266 } 3267 } 3268 3269 /** 3270 * Read the eeprom to find out what channels are valid for the given 3271 * band and update net80211 with what we find. 3272 */ 3273 static void 3274 wpi_read_eeprom_channels(struct wpi_softc *sc, int n) 3275 { 3276 struct ifnet *ifp = sc->sc_ifp; 3277 struct ieee80211com *ic = ifp->if_l2com; 3278 const struct wpi_chan_band *band = &wpi_bands[n]; 3279 struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND]; 3280 struct ieee80211_channel *c; 3281 int chan, i, passive; 3282 3283 wpi_read_prom_data(sc, band->addr, channels, 3284 band->nchan * sizeof (struct wpi_eeprom_chan)); 3285 3286 for (i = 0; i < band->nchan; i++) { 3287 if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID)) { 3288 DPRINTFN(WPI_DEBUG_HW, 3289 ("Channel Not Valid: %d, band %d\n", 3290 band->chan[i],n)); 3291 continue; 3292 } 3293 3294 passive = 0; 3295 chan = band->chan[i]; 3296 c = &ic->ic_channels[ic->ic_nchans++]; 3297 3298 /* is active scan allowed on this channel? */ 3299 if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) { 3300 passive = IEEE80211_CHAN_PASSIVE; 3301 } 3302 3303 if (n == 0) { /* 2GHz band */ 3304 c->ic_ieee = chan; 3305 c->ic_freq = ieee80211_ieee2mhz(chan, 3306 IEEE80211_CHAN_2GHZ); 3307 c->ic_flags = IEEE80211_CHAN_B | passive; 3308 3309 c = &ic->ic_channels[ic->ic_nchans++]; 3310 c->ic_ieee = chan; 3311 c->ic_freq = ieee80211_ieee2mhz(chan, 3312 IEEE80211_CHAN_2GHZ); 3313 c->ic_flags = IEEE80211_CHAN_G | passive; 3314 3315 } else { /* 5GHz band */ 3316 /* 3317 * Some 3945ABG adapters support channels 7, 8, 11 3318 * and 12 in the 2GHz *and* 5GHz bands. 3319 * Because of limitations in our net80211(9) stack, 3320 * we can't support these channels in 5GHz band. 3321 * XXX not true; just need to map to proper frequency 3322 */ 3323 if (chan <= 14) 3324 continue; 3325 3326 c->ic_ieee = chan; 3327 c->ic_freq = ieee80211_ieee2mhz(chan, 3328 IEEE80211_CHAN_5GHZ); 3329 c->ic_flags = IEEE80211_CHAN_A | passive; 3330 } 3331 3332 /* save maximum allowed power for this channel */ 3333 sc->maxpwr[chan] = channels[i].maxpwr; 3334 3335 #if 0 3336 // XXX We can probably use this an get rid of maxpwr - ben 20070617 3337 ic->ic_channels[chan].ic_maxpower = channels[i].maxpwr; 3338 //ic->ic_channels[chan].ic_minpower... 3339 //ic->ic_channels[chan].ic_maxregtxpower... 3340 #endif 3341 3342 DPRINTF(("adding chan %d (%dMHz) flags=0x%x maxpwr=%d" 3343 " passive=%d, offset %d\n", chan, c->ic_freq, 3344 channels[i].flags, sc->maxpwr[chan], 3345 (c->ic_flags & IEEE80211_CHAN_PASSIVE) != 0, 3346 ic->ic_nchans)); 3347 } 3348 } 3349 3350 static void 3351 wpi_read_eeprom_group(struct wpi_softc *sc, int n) 3352 { 3353 struct wpi_power_group *group = &sc->groups[n]; 3354 struct wpi_eeprom_group rgroup; 3355 int i; 3356 3357 wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup, 3358 sizeof rgroup); 3359 3360 /* save power group information */ 3361 group->chan = rgroup.chan; 3362 group->maxpwr = rgroup.maxpwr; 3363 /* temperature at which the samples were taken */ 3364 group->temp = (int16_t)le16toh(rgroup.temp); 3365 3366 DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n, 3367 group->chan, group->maxpwr, group->temp)); 3368 3369 for (i = 0; i < WPI_SAMPLES_COUNT; i++) { 3370 group->samples[i].index = rgroup.samples[i].index; 3371 group->samples[i].power = rgroup.samples[i].power; 3372 3373 DPRINTF(("\tsample %d: index=%d power=%d\n", i, 3374 group->samples[i].index, group->samples[i].power)); 3375 } 3376 } 3377 3378 /* 3379 * Update Tx power to match what is defined for channel `c'. 3380 */ 3381 static int 3382 wpi_set_txpower(struct wpi_softc *sc, struct ieee80211_channel *c, int async) 3383 { 3384 struct ifnet *ifp = sc->sc_ifp; 3385 struct ieee80211com *ic = ifp->if_l2com; 3386 struct wpi_power_group *group; 3387 struct wpi_cmd_txpower txpower; 3388 u_int chan; 3389 int i; 3390 3391 /* get channel number */ 3392 chan = ieee80211_chan2ieee(ic, c); 3393 3394 /* find the power group to which this channel belongs */ 3395 if (IEEE80211_IS_CHAN_5GHZ(c)) { 3396 for (group = &sc->groups[1]; group < &sc->groups[4]; group++) 3397 if (chan <= group->chan) 3398 break; 3399 } else 3400 group = &sc->groups[0]; 3401 3402 memset(&txpower, 0, sizeof txpower); 3403 txpower.band = IEEE80211_IS_CHAN_5GHZ(c) ? 0 : 1; 3404 txpower.channel = htole16(chan); 3405 3406 /* set Tx power for all OFDM and CCK rates */ 3407 for (i = 0; i <= 11 ; i++) { 3408 /* retrieve Tx power for this channel/rate combination */ 3409 int idx = wpi_get_power_index(sc, group, c, 3410 wpi_ridx_to_rate[i]); 3411 3412 txpower.rates[i].rate = wpi_ridx_to_plcp[i]; 3413 3414 if (IEEE80211_IS_CHAN_5GHZ(c)) { 3415 txpower.rates[i].gain_radio = wpi_rf_gain_5ghz[idx]; 3416 txpower.rates[i].gain_dsp = wpi_dsp_gain_5ghz[idx]; 3417 } else { 3418 txpower.rates[i].gain_radio = wpi_rf_gain_2ghz[idx]; 3419 txpower.rates[i].gain_dsp = wpi_dsp_gain_2ghz[idx]; 3420 } 3421 DPRINTFN(WPI_DEBUG_TEMP,("chan %d/rate %d: power index %d\n", 3422 chan, wpi_ridx_to_rate[i], idx)); 3423 } 3424 3425 return wpi_cmd(sc, WPI_CMD_TXPOWER, &txpower, sizeof txpower, async); 3426 } 3427 3428 /* 3429 * Determine Tx power index for a given channel/rate combination. 3430 * This takes into account the regulatory information from EEPROM and the 3431 * current temperature. 3432 */ 3433 static int 3434 wpi_get_power_index(struct wpi_softc *sc, struct wpi_power_group *group, 3435 struct ieee80211_channel *c, int rate) 3436 { 3437 /* fixed-point arithmetic division using a n-bit fractional part */ 3438 #define fdivround(a, b, n) \ 3439 ((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n)) 3440 3441 /* linear interpolation */ 3442 #define interpolate(x, x1, y1, x2, y2, n) \ 3443 ((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n)) 3444 3445 struct ifnet *ifp = sc->sc_ifp; 3446 struct ieee80211com *ic = ifp->if_l2com; 3447 struct wpi_power_sample *sample; 3448 int pwr, idx; 3449 u_int chan; 3450 3451 /* get channel number */ 3452 chan = ieee80211_chan2ieee(ic, c); 3453 3454 /* default power is group's maximum power - 3dB */ 3455 pwr = group->maxpwr / 2; 3456 3457 /* decrease power for highest OFDM rates to reduce distortion */ 3458 switch (rate) { 3459 case 72: /* 36Mb/s */ 3460 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 0 : 5; 3461 break; 3462 case 96: /* 48Mb/s */ 3463 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 7 : 10; 3464 break; 3465 case 108: /* 54Mb/s */ 3466 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 9 : 12; 3467 break; 3468 } 3469 3470 /* never exceed channel's maximum allowed Tx power */ 3471 pwr = min(pwr, sc->maxpwr[chan]); 3472 3473 /* retrieve power index into gain tables from samples */ 3474 for (sample = group->samples; sample < &group->samples[3]; sample++) 3475 if (pwr > sample[1].power) 3476 break; 3477 /* fixed-point linear interpolation using a 19-bit fractional part */ 3478 idx = interpolate(pwr, sample[0].power, sample[0].index, 3479 sample[1].power, sample[1].index, 19); 3480 3481 /* 3482 * Adjust power index based on current temperature 3483 * - if colder than factory-calibrated: decreate output power 3484 * - if warmer than factory-calibrated: increase output power 3485 */ 3486 idx -= (sc->temp - group->temp) * 11 / 100; 3487 3488 /* decrease power for CCK rates (-5dB) */ 3489 if (!WPI_RATE_IS_OFDM(rate)) 3490 idx += 10; 3491 3492 /* keep power index in a valid range */ 3493 if (idx < 0) 3494 return 0; 3495 if (idx > WPI_MAX_PWR_INDEX) 3496 return WPI_MAX_PWR_INDEX; 3497 return idx; 3498 3499 #undef interpolate 3500 #undef fdivround 3501 } 3502 3503 /** 3504 * Called by net80211 framework to indicate that a scan 3505 * is starting. This function doesn't actually do the scan, 3506 * wpi_scan_curchan starts things off. This function is more 3507 * of an early warning from the framework we should get ready 3508 * for the scan. 3509 */ 3510 static void 3511 wpi_scan_start(struct ieee80211com *ic) 3512 { 3513 struct ifnet *ifp = ic->ic_ifp; 3514 struct wpi_softc *sc = ifp->if_softc; 3515 3516 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 3517 } 3518 3519 /** 3520 * Called by the net80211 framework, indicates that the 3521 * scan has ended. If there is a scan in progress on the card 3522 * then it should be aborted. 3523 */ 3524 static void 3525 wpi_scan_end(struct ieee80211com *ic) 3526 { 3527 /* XXX ignore */ 3528 } 3529 3530 /** 3531 * Called by the net80211 framework to indicate to the driver 3532 * that the channel should be changed 3533 */ 3534 static void 3535 wpi_set_channel(struct ieee80211com *ic) 3536 { 3537 struct ifnet *ifp = ic->ic_ifp; 3538 struct wpi_softc *sc = ifp->if_softc; 3539 int error; 3540 3541 /* 3542 * Only need to set the channel in Monitor mode. AP scanning and auth 3543 * are already taken care of by their respective firmware commands. 3544 */ 3545 if (ic->ic_opmode == IEEE80211_M_MONITOR) { 3546 error = wpi_config(sc); 3547 if (error != 0) 3548 device_printf(sc->sc_dev, 3549 "error %d settting channel\n", error); 3550 } 3551 } 3552 3553 /** 3554 * Called by net80211 to indicate that we need to scan the current 3555 * channel. The channel is previously be set via the wpi_set_channel 3556 * callback. 3557 */ 3558 static void 3559 wpi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell) 3560 { 3561 struct ieee80211vap *vap = ss->ss_vap; 3562 struct ifnet *ifp = vap->iv_ic->ic_ifp; 3563 struct wpi_softc *sc = ifp->if_softc; 3564 3565 if (wpi_scan(sc)) 3566 ieee80211_cancel_scan(vap); 3567 } 3568 3569 /** 3570 * Called by the net80211 framework to indicate 3571 * the minimum dwell time has been met, terminate the scan. 3572 * We don't actually terminate the scan as the firmware will notify 3573 * us when it's finished and we have no way to interrupt it. 3574 */ 3575 static void 3576 wpi_scan_mindwell(struct ieee80211_scan_state *ss) 3577 { 3578 /* NB: don't try to abort scan; wait for firmware to finish */ 3579 } 3580 3581 static void 3582 wpi_hwreset_task(void *arg, int pending) 3583 { 3584 struct wpi_softc *sc; 3585 3586 wlan_serialize_enter(); 3587 sc = arg; 3588 wpi_init_locked(sc, 0); 3589 wlan_serialize_exit(); 3590 } 3591 3592 static void 3593 wpi_rfreset_task(void *arg, int pending) 3594 { 3595 struct wpi_softc *sc; 3596 3597 wlan_serialize_enter(); 3598 sc = arg; 3599 wpi_rfkill_resume(sc); 3600 wlan_serialize_exit(); 3601 } 3602 3603 /* 3604 * Allocate DMA-safe memory for firmware transfer. 3605 */ 3606 static int 3607 wpi_alloc_fwmem(struct wpi_softc *sc) 3608 { 3609 /* allocate enough contiguous space to store text and data */ 3610 return wpi_dma_contig_alloc(sc, &sc->fw_dma, NULL, 3611 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 1, 3612 BUS_DMA_NOWAIT); 3613 } 3614 3615 static void 3616 wpi_free_fwmem(struct wpi_softc *sc) 3617 { 3618 wpi_dma_contig_free(&sc->fw_dma); 3619 } 3620 3621 /** 3622 * Called every second, wpi_watchdog_callout used by the watch dog timer 3623 * to check that the card is still alive 3624 */ 3625 static void 3626 wpi_watchdog_callout(void *arg) 3627 { 3628 struct wpi_softc *sc; 3629 struct ifnet *ifp; 3630 struct ieee80211com *ic; 3631 uint32_t tmp; 3632 3633 wlan_serialize_enter(); 3634 sc = arg; 3635 ifp = sc->sc_ifp; 3636 ic = ifp->if_l2com; 3637 DPRINTFN(WPI_DEBUG_WATCHDOG,("Watchdog: tick\n")); 3638 3639 if (sc->flags & WPI_FLAG_HW_RADIO_OFF) { 3640 /* No need to lock firmware memory */ 3641 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF); 3642 3643 if ((tmp & 0x1) == 0) { 3644 /* Radio kill switch is still off */ 3645 callout_reset(&sc->watchdog_to_callout, hz, wpi_watchdog_callout, sc); 3646 wlan_serialize_exit(); 3647 return; 3648 } 3649 3650 device_printf(sc->sc_dev, "Hardware Switch Enabled\n"); 3651 ieee80211_runtask(ic, &sc->sc_radiotask); 3652 wlan_serialize_exit(); 3653 return; 3654 } 3655 3656 if (sc->sc_tx_timer > 0) { 3657 if (--sc->sc_tx_timer == 0) { 3658 device_printf(sc->sc_dev,"device timeout\n"); 3659 IFNET_STAT_INC(ifp, oerrors, 1); 3660 wlan_serialize_exit(); 3661 ieee80211_runtask(ic, &sc->sc_restarttask); 3662 wlan_serialize_enter(); 3663 } 3664 } 3665 if (sc->sc_scan_timer > 0) { 3666 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3667 if (--sc->sc_scan_timer == 0 && vap != NULL) { 3668 device_printf(sc->sc_dev,"scan timeout\n"); 3669 ieee80211_cancel_scan(vap); 3670 wlan_serialize_exit(); 3671 ieee80211_runtask(ic, &sc->sc_restarttask); 3672 wlan_serialize_enter(); 3673 } 3674 } 3675 3676 if (ifp->if_flags & IFF_RUNNING) 3677 callout_reset(&sc->watchdog_to_callout, hz, wpi_watchdog_callout, sc); 3678 3679 wlan_serialize_exit(); 3680 } 3681 3682 #ifdef WPI_DEBUG 3683 static const char *wpi_cmd_str(int cmd) 3684 { 3685 switch (cmd) { 3686 case WPI_DISABLE_CMD: return "WPI_DISABLE_CMD"; 3687 case WPI_CMD_CONFIGURE: return "WPI_CMD_CONFIGURE"; 3688 case WPI_CMD_ASSOCIATE: return "WPI_CMD_ASSOCIATE"; 3689 case WPI_CMD_SET_WME: return "WPI_CMD_SET_WME"; 3690 case WPI_CMD_TSF: return "WPI_CMD_TSF"; 3691 case WPI_CMD_ADD_NODE: return "WPI_CMD_ADD_NODE"; 3692 case WPI_CMD_TX_DATA: return "WPI_CMD_TX_DATA"; 3693 case WPI_CMD_MRR_SETUP: return "WPI_CMD_MRR_SETUP"; 3694 case WPI_CMD_SET_LED: return "WPI_CMD_SET_LED"; 3695 case WPI_CMD_SET_POWER_MODE: return "WPI_CMD_SET_POWER_MODE"; 3696 case WPI_CMD_SCAN: return "WPI_CMD_SCAN"; 3697 case WPI_CMD_SET_BEACON:return "WPI_CMD_SET_BEACON"; 3698 case WPI_CMD_TXPOWER: return "WPI_CMD_TXPOWER"; 3699 case WPI_CMD_BLUETOOTH: return "WPI_CMD_BLUETOOTH"; 3700 3701 default: 3702 KASSERT(1, ("Unknown Command: %d", cmd)); 3703 return "UNKNOWN CMD"; /* Make the compiler happy */ 3704 } 3705 } 3706 #endif 3707 3708 MODULE_DEPEND(wpi, pci, 1, 1, 1); 3709 MODULE_DEPEND(wpi, wlan, 1, 1, 1); 3710 MODULE_DEPEND(wpi, firmware, 1, 1, 1); 3711 MODULE_DEPEND(wpi, wlan_amrr, 1, 1, 1); 3712