if_wpi.c revision 190462
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 19#define VERSION "20071127" 20 21#include <sys/cdefs.h> 22__FBSDID("$FreeBSD: head/sys/dev/wpi/if_wpi.c 190462 2009-03-27 05:44:53Z jmallett $"); 23 24/* 25 * Driver for Intel PRO/Wireless 3945ABG 802.11 network adapters. 26 * 27 * The 3945ABG network adapter doesn't use traditional hardware as 28 * many other adaptors do. Instead at run time the eeprom is set into a known 29 * state and told to load boot firmware. The boot firmware loads an init and a 30 * main binary firmware image into SRAM on the card via DMA. 31 * Once the firmware is loaded, the driver/hw then 32 * communicate by way of circular dma rings via the the SRAM to the firmware. 33 * 34 * There is 6 memory rings. 1 command ring, 1 rx data ring & 4 tx data rings. 35 * The 4 tx data rings allow for prioritization QoS. 36 * 37 * The rx data ring consists of 32 dma buffers. Two registers are used to 38 * indicate where in the ring the driver and the firmware are up to. The 39 * driver sets the initial read index (reg1) and the initial write index (reg2), 40 * the firmware updates the read index (reg1) on rx of a packet and fires an 41 * interrupt. The driver then processes the buffers starting at reg1 indicating 42 * to the firmware which buffers have been accessed by updating reg2. At the 43 * same time allocating new memory for the processed buffer. 44 * 45 * A similar thing happens with the tx rings. The difference is the firmware 46 * stop processing buffers once the queue is full and until confirmation 47 * of a successful transmition (tx_intr) has occurred. 48 * 49 * The command ring operates in the same manner as the tx queues. 50 * 51 * All communication direct to the card (ie eeprom) is classed as Stage1 52 * communication 53 * 54 * All communication via the firmware to the card is classed as State2. 55 * The firmware consists of 2 parts. A bootstrap firmware and a runtime 56 * firmware. The bootstrap firmware and runtime firmware are loaded 57 * from host memory via dma to the card then told to execute. From this point 58 * on the majority of communications between the driver and the card goes 59 * via the firmware. 60 */ 61 62#include <sys/param.h> 63#include <sys/sysctl.h> 64#include <sys/sockio.h> 65#include <sys/mbuf.h> 66#include <sys/kernel.h> 67#include <sys/socket.h> 68#include <sys/systm.h> 69#include <sys/malloc.h> 70#include <sys/queue.h> 71#include <sys/taskqueue.h> 72#include <sys/module.h> 73#include <sys/bus.h> 74#include <sys/endian.h> 75#include <sys/linker.h> 76#include <sys/firmware.h> 77 78#include <machine/bus.h> 79#include <machine/resource.h> 80#include <sys/rman.h> 81 82#include <dev/pci/pcireg.h> 83#include <dev/pci/pcivar.h> 84 85#include <net/bpf.h> 86#include <net/if.h> 87#include <net/if_arp.h> 88#include <net/ethernet.h> 89#include <net/if_dl.h> 90#include <net/if_media.h> 91#include <net/if_types.h> 92 93#include <net80211/ieee80211_var.h> 94#include <net80211/ieee80211_radiotap.h> 95#include <net80211/ieee80211_regdomain.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#include <dev/wpi/if_wpireg.h> 104#include <dev/wpi/if_wpivar.h> 105 106#define WPI_DEBUG 107 108#ifdef WPI_DEBUG 109#define DPRINTF(x) do { if (wpi_debug != 0) printf x; } while (0) 110#define DPRINTFN(n, x) do { if (wpi_debug & n) printf x; } while (0) 111#define WPI_DEBUG_SET (wpi_debug != 0) 112 113enum { 114 WPI_DEBUG_UNUSED = 0x00000001, /* Unused */ 115 WPI_DEBUG_HW = 0x00000002, /* Stage 1 (eeprom) debugging */ 116 WPI_DEBUG_TX = 0x00000004, /* Stage 2 TX intrp debugging*/ 117 WPI_DEBUG_RX = 0x00000008, /* Stage 2 RX intrp debugging */ 118 WPI_DEBUG_CMD = 0x00000010, /* Stage 2 CMD intrp debugging*/ 119 WPI_DEBUG_FIRMWARE = 0x00000020, /* firmware(9) loading debug */ 120 WPI_DEBUG_DMA = 0x00000040, /* DMA (de)allocations/syncs */ 121 WPI_DEBUG_SCANNING = 0x00000080, /* Stage 2 Scanning debugging */ 122 WPI_DEBUG_NOTIFY = 0x00000100, /* State 2 Noftif intr debug */ 123 WPI_DEBUG_TEMP = 0x00000200, /* TXPower/Temp Calibration */ 124 WPI_DEBUG_OPS = 0x00000400, /* wpi_ops taskq debug */ 125 WPI_DEBUG_WATCHDOG = 0x00000800, /* Watch dog debug */ 126 WPI_DEBUG_ANY = 0xffffffff 127}; 128 129static int wpi_debug = 1; 130SYSCTL_INT(_debug, OID_AUTO, wpi, CTLFLAG_RW, &wpi_debug, 0, "wpi debug level"); 131TUNABLE_INT("debug.wpi", &wpi_debug); 132 133#else 134#define DPRINTF(x) 135#define DPRINTFN(n, x) 136#define WPI_DEBUG_SET 0 137#endif 138 139struct wpi_ident { 140 uint16_t vendor; 141 uint16_t device; 142 uint16_t subdevice; 143 const char *name; 144}; 145 146static const struct wpi_ident wpi_ident_table[] = { 147 /* The below entries support ABG regardless of the subid */ 148 { 0x8086, 0x4222, 0x0, "Intel(R) PRO/Wireless 3945ABG" }, 149 { 0x8086, 0x4227, 0x0, "Intel(R) PRO/Wireless 3945ABG" }, 150 /* The below entries only support BG */ 151 { 0x8086, 0x4222, 0x1005, "Intel(R) PRO/Wireless 3945BG" }, 152 { 0x8086, 0x4222, 0x1034, "Intel(R) PRO/Wireless 3945BG" }, 153 { 0x8086, 0x4227, 0x1014, "Intel(R) PRO/Wireless 3945BG" }, 154 { 0x8086, 0x4222, 0x1044, "Intel(R) PRO/Wireless 3945BG" }, 155 { 0, 0, 0, NULL } 156}; 157 158static struct ieee80211vap *wpi_vap_create(struct ieee80211com *, 159 const char name[IFNAMSIZ], int unit, int opmode, 160 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN], 161 const uint8_t mac[IEEE80211_ADDR_LEN]); 162static void wpi_vap_delete(struct ieee80211vap *); 163static int wpi_dma_contig_alloc(struct wpi_softc *, struct wpi_dma_info *, 164 void **, bus_size_t, bus_size_t, int); 165static void wpi_dma_contig_free(struct wpi_dma_info *); 166static void wpi_dma_map_addr(void *, bus_dma_segment_t *, int, int); 167static int wpi_alloc_shared(struct wpi_softc *); 168static void wpi_free_shared(struct wpi_softc *); 169static int wpi_alloc_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 170static void wpi_reset_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 171static void wpi_free_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 172static int wpi_alloc_tx_ring(struct wpi_softc *, struct wpi_tx_ring *, 173 int, int); 174static void wpi_reset_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 175static void wpi_free_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 176static struct ieee80211_node *wpi_node_alloc(struct ieee80211vap *, 177 const uint8_t mac[IEEE80211_ADDR_LEN]); 178static int wpi_newstate(struct ieee80211vap *, enum ieee80211_state, int); 179static void wpi_mem_lock(struct wpi_softc *); 180static void wpi_mem_unlock(struct wpi_softc *); 181static uint32_t wpi_mem_read(struct wpi_softc *, uint16_t); 182static void wpi_mem_write(struct wpi_softc *, uint16_t, uint32_t); 183static void wpi_mem_write_region_4(struct wpi_softc *, uint16_t, 184 const uint32_t *, int); 185static uint16_t wpi_read_prom_data(struct wpi_softc *, uint32_t, void *, int); 186static int wpi_alloc_fwmem(struct wpi_softc *); 187static void wpi_free_fwmem(struct wpi_softc *); 188static int wpi_load_firmware(struct wpi_softc *); 189static void wpi_unload_firmware(struct wpi_softc *); 190static int wpi_load_microcode(struct wpi_softc *, const uint8_t *, int); 191static void wpi_rx_intr(struct wpi_softc *, struct wpi_rx_desc *, 192 struct wpi_rx_data *); 193static void wpi_tx_intr(struct wpi_softc *, struct wpi_rx_desc *); 194static void wpi_cmd_intr(struct wpi_softc *, struct wpi_rx_desc *); 195static void wpi_bmiss(void *, int); 196static void wpi_notif_intr(struct wpi_softc *); 197static void wpi_intr(void *); 198static void wpi_ops(void *, int); 199static uint8_t wpi_plcp_signal(int); 200static int wpi_queue_cmd(struct wpi_softc *, int, int, int); 201static void wpi_watchdog(void *); 202static int wpi_tx_data(struct wpi_softc *, struct mbuf *, 203 struct ieee80211_node *, int); 204static void wpi_start(struct ifnet *); 205static void wpi_start_locked(struct ifnet *); 206static int wpi_raw_xmit(struct ieee80211_node *, struct mbuf *, 207 const struct ieee80211_bpf_params *); 208static void wpi_scan_start(struct ieee80211com *); 209static void wpi_scan_end(struct ieee80211com *); 210static void wpi_set_channel(struct ieee80211com *); 211static void wpi_scan_curchan(struct ieee80211_scan_state *, unsigned long); 212static void wpi_scan_mindwell(struct ieee80211_scan_state *); 213static int wpi_ioctl(struct ifnet *, u_long, caddr_t); 214static void wpi_read_eeprom(struct wpi_softc *); 215static void wpi_read_eeprom_channels(struct wpi_softc *, int); 216static void wpi_read_eeprom_group(struct wpi_softc *, int); 217static int wpi_cmd(struct wpi_softc *, int, const void *, int, int); 218static int wpi_wme_update(struct ieee80211com *); 219static int wpi_mrr_setup(struct wpi_softc *); 220static void wpi_set_led(struct wpi_softc *, uint8_t, uint8_t, uint8_t); 221static void wpi_enable_tsf(struct wpi_softc *, struct ieee80211_node *); 222#if 0 223static int wpi_setup_beacon(struct wpi_softc *, struct ieee80211_node *); 224#endif 225static int wpi_auth(struct wpi_softc *, struct ieee80211vap *); 226static int wpi_run(struct wpi_softc *, struct ieee80211vap *); 227static int wpi_scan(struct wpi_softc *); 228static int wpi_config(struct wpi_softc *); 229static void wpi_stop_master(struct wpi_softc *); 230static int wpi_power_up(struct wpi_softc *); 231static int wpi_reset(struct wpi_softc *); 232static void wpi_hw_config(struct wpi_softc *); 233static void wpi_init(void *); 234static void wpi_init_locked(struct wpi_softc *, int); 235static void wpi_stop(struct wpi_softc *); 236static void wpi_stop_locked(struct wpi_softc *); 237 238static void wpi_newassoc(struct ieee80211_node *, int); 239static int wpi_set_txpower(struct wpi_softc *, struct ieee80211_channel *, 240 int); 241static void wpi_calib_timeout(void *); 242static void wpi_power_calibration(struct wpi_softc *, int); 243static int wpi_get_power_index(struct wpi_softc *, 244 struct wpi_power_group *, struct ieee80211_channel *, int); 245#ifdef WPI_DEBUG 246static const char *wpi_cmd_str(int); 247#endif 248static int wpi_probe(device_t); 249static int wpi_attach(device_t); 250static int wpi_detach(device_t); 251static int wpi_shutdown(device_t); 252static int wpi_suspend(device_t); 253static int wpi_resume(device_t); 254 255 256static device_method_t wpi_methods[] = { 257 /* Device interface */ 258 DEVMETHOD(device_probe, wpi_probe), 259 DEVMETHOD(device_attach, wpi_attach), 260 DEVMETHOD(device_detach, wpi_detach), 261 DEVMETHOD(device_shutdown, wpi_shutdown), 262 DEVMETHOD(device_suspend, wpi_suspend), 263 DEVMETHOD(device_resume, wpi_resume), 264 265 { 0, 0 } 266}; 267 268static driver_t wpi_driver = { 269 "wpi", 270 wpi_methods, 271 sizeof (struct wpi_softc) 272}; 273 274static devclass_t wpi_devclass; 275 276DRIVER_MODULE(wpi, pci, wpi_driver, wpi_devclass, 0, 0); 277 278static const uint8_t wpi_ridx_to_plcp[] = { 279 /* OFDM: IEEE Std 802.11a-1999, pp. 14 Table 80 */ 280 /* R1-R4 (ral/ural is R4-R1) */ 281 0xd, 0xf, 0x5, 0x7, 0x9, 0xb, 0x1, 0x3, 282 /* CCK: device-dependent */ 283 10, 20, 55, 110 284}; 285static const uint8_t wpi_ridx_to_rate[] = { 286 12, 18, 24, 36, 48, 72, 96, 108, /* OFDM */ 287 2, 4, 11, 22 /*CCK */ 288}; 289 290 291static int 292wpi_probe(device_t dev) 293{ 294 const struct wpi_ident *ident; 295 296 for (ident = wpi_ident_table; ident->name != NULL; ident++) { 297 if (pci_get_vendor(dev) == ident->vendor && 298 pci_get_device(dev) == ident->device) { 299 device_set_desc(dev, ident->name); 300 return 0; 301 } 302 } 303 return ENXIO; 304} 305 306/** 307 * Load the firmare image from disk to the allocated dma buffer. 308 * we also maintain the reference to the firmware pointer as there 309 * is times where we may need to reload the firmware but we are not 310 * in a context that can access the filesystem (ie taskq cause by restart) 311 * 312 * @return 0 on success, an errno on failure 313 */ 314static int 315wpi_load_firmware(struct wpi_softc *sc) 316{ 317 const struct firmware *fp; 318 struct wpi_dma_info *dma = &sc->fw_dma; 319 const struct wpi_firmware_hdr *hdr; 320 const uint8_t *itext, *idata, *rtext, *rdata, *btext; 321 uint32_t itextsz, idatasz, rtextsz, rdatasz, btextsz; 322 int error; 323 324 DPRINTFN(WPI_DEBUG_FIRMWARE, 325 ("Attempting Loading Firmware from wpi_fw module\n")); 326 327 WPI_UNLOCK(sc); 328 329 if (sc->fw_fp == NULL && (sc->fw_fp = firmware_get("wpifw")) == NULL) { 330 device_printf(sc->sc_dev, 331 "could not load firmware image 'wpifw'\n"); 332 error = ENOENT; 333 WPI_LOCK(sc); 334 goto fail; 335 } 336 337 fp = sc->fw_fp; 338 339 WPI_LOCK(sc); 340 341 /* Validate the firmware is minimum a particular version */ 342 if (fp->version < WPI_FW_MINVERSION) { 343 device_printf(sc->sc_dev, 344 "firmware version is too old. Need %d, got %d\n", 345 WPI_FW_MINVERSION, 346 fp->version); 347 error = ENXIO; 348 goto fail; 349 } 350 351 if (fp->datasize < sizeof (struct wpi_firmware_hdr)) { 352 device_printf(sc->sc_dev, 353 "firmware file too short: %zu bytes\n", fp->datasize); 354 error = ENXIO; 355 goto fail; 356 } 357 358 hdr = (const struct wpi_firmware_hdr *)fp->data; 359 360 /* | RUNTIME FIRMWARE | INIT FIRMWARE | BOOT FW | 361 |HDR|<--TEXT-->|<--DATA-->|<--TEXT-->|<--DATA-->|<--TEXT-->| */ 362 363 rtextsz = le32toh(hdr->rtextsz); 364 rdatasz = le32toh(hdr->rdatasz); 365 itextsz = le32toh(hdr->itextsz); 366 idatasz = le32toh(hdr->idatasz); 367 btextsz = le32toh(hdr->btextsz); 368 369 /* check that all firmware segments are present */ 370 if (fp->datasize < sizeof (struct wpi_firmware_hdr) + 371 rtextsz + rdatasz + itextsz + idatasz + btextsz) { 372 device_printf(sc->sc_dev, 373 "firmware file too short: %zu bytes\n", fp->datasize); 374 error = ENXIO; /* XXX appropriate error code? */ 375 goto fail; 376 } 377 378 /* get pointers to firmware segments */ 379 rtext = (const uint8_t *)(hdr + 1); 380 rdata = rtext + rtextsz; 381 itext = rdata + rdatasz; 382 idata = itext + itextsz; 383 btext = idata + idatasz; 384 385 DPRINTFN(WPI_DEBUG_FIRMWARE, 386 ("Firmware Version: Major %d, Minor %d, Driver %d, \n" 387 "runtime (text: %u, data: %u) init (text: %u, data %u) boot (text %u)\n", 388 (le32toh(hdr->version) & 0xff000000) >> 24, 389 (le32toh(hdr->version) & 0x00ff0000) >> 16, 390 (le32toh(hdr->version) & 0x0000ffff), 391 rtextsz, rdatasz, 392 itextsz, idatasz, btextsz)); 393 394 DPRINTFN(WPI_DEBUG_FIRMWARE,("rtext 0x%x\n", *(const uint32_t *)rtext)); 395 DPRINTFN(WPI_DEBUG_FIRMWARE,("rdata 0x%x\n", *(const uint32_t *)rdata)); 396 DPRINTFN(WPI_DEBUG_FIRMWARE,("itext 0x%x\n", *(const uint32_t *)itext)); 397 DPRINTFN(WPI_DEBUG_FIRMWARE,("idata 0x%x\n", *(const uint32_t *)idata)); 398 DPRINTFN(WPI_DEBUG_FIRMWARE,("btext 0x%x\n", *(const uint32_t *)btext)); 399 400 /* sanity checks */ 401 if (rtextsz > WPI_FW_MAIN_TEXT_MAXSZ || 402 rdatasz > WPI_FW_MAIN_DATA_MAXSZ || 403 itextsz > WPI_FW_INIT_TEXT_MAXSZ || 404 idatasz > WPI_FW_INIT_DATA_MAXSZ || 405 btextsz > WPI_FW_BOOT_TEXT_MAXSZ || 406 (btextsz & 3) != 0) { 407 device_printf(sc->sc_dev, "firmware invalid\n"); 408 error = EINVAL; 409 goto fail; 410 } 411 412 /* copy initialization images into pre-allocated DMA-safe memory */ 413 memcpy(dma->vaddr, idata, idatasz); 414 memcpy(dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, itext, itextsz); 415 416 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE); 417 418 /* tell adapter where to find initialization images */ 419 wpi_mem_lock(sc); 420 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 421 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, idatasz); 422 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 423 dma->paddr + WPI_FW_INIT_DATA_MAXSZ); 424 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, itextsz); 425 wpi_mem_unlock(sc); 426 427 /* load firmware boot code */ 428 if ((error = wpi_load_microcode(sc, btext, btextsz)) != 0) { 429 device_printf(sc->sc_dev, "Failed to load microcode\n"); 430 goto fail; 431 } 432 433 /* now press "execute" */ 434 WPI_WRITE(sc, WPI_RESET, 0); 435 436 /* wait at most one second for the first alive notification */ 437 if ((error = msleep(sc, &sc->sc_mtx, PCATCH, "wpiinit", hz)) != 0) { 438 device_printf(sc->sc_dev, 439 "timeout waiting for adapter to initialize\n"); 440 goto fail; 441 } 442 443 /* copy runtime images into pre-allocated DMA-sage memory */ 444 memcpy(dma->vaddr, rdata, rdatasz); 445 memcpy(dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, rtext, rtextsz); 446 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE); 447 448 /* tell adapter where to find runtime images */ 449 wpi_mem_lock(sc); 450 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 451 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, rdatasz); 452 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 453 dma->paddr + WPI_FW_MAIN_DATA_MAXSZ); 454 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | rtextsz); 455 wpi_mem_unlock(sc); 456 457 /* wait at most one second for the first alive notification */ 458 if ((error = msleep(sc, &sc->sc_mtx, PCATCH, "wpiinit", hz)) != 0) { 459 device_printf(sc->sc_dev, 460 "timeout waiting for adapter to initialize2\n"); 461 goto fail; 462 } 463 464 DPRINTFN(WPI_DEBUG_FIRMWARE, 465 ("Firmware loaded to driver successfully\n")); 466 return error; 467fail: 468 wpi_unload_firmware(sc); 469 return error; 470} 471 472/** 473 * Free the referenced firmware image 474 */ 475static void 476wpi_unload_firmware(struct wpi_softc *sc) 477{ 478 479 if (sc->fw_fp) { 480 WPI_UNLOCK(sc); 481 firmware_put(sc->fw_fp, FIRMWARE_UNLOAD); 482 WPI_LOCK(sc); 483 sc->fw_fp = NULL; 484 } 485} 486 487static int 488wpi_attach(device_t dev) 489{ 490 struct wpi_softc *sc = device_get_softc(dev); 491 struct ifnet *ifp; 492 struct ieee80211com *ic; 493 int ac, error, supportsa = 1; 494 uint32_t tmp; 495 const struct wpi_ident *ident; 496 497 sc->sc_dev = dev; 498 499 if (bootverbose || WPI_DEBUG_SET) 500 device_printf(sc->sc_dev,"Driver Revision %s\n", VERSION); 501 502 /* 503 * Some card's only support 802.11b/g not a, check to see if 504 * this is one such card. A 0x0 in the subdevice table indicates 505 * the entire subdevice range is to be ignored. 506 */ 507 for (ident = wpi_ident_table; ident->name != NULL; ident++) { 508 if (ident->subdevice && 509 pci_get_subdevice(dev) == ident->subdevice) { 510 supportsa = 0; 511 break; 512 } 513 } 514 515 /* 516 * Create the taskqueues used by the driver. Primarily 517 * sc_tq handles most the task 518 */ 519 sc->sc_tq = taskqueue_create("wpi_taskq", M_NOWAIT | M_ZERO, 520 taskqueue_thread_enqueue, &sc->sc_tq); 521 taskqueue_start_threads(&sc->sc_tq, 1, PI_NET, "%s taskq", 522 device_get_nameunit(dev)); 523 524 /* Create the tasks that can be queued */ 525 TASK_INIT(&sc->sc_opstask, 0, wpi_ops, sc); 526 TASK_INIT(&sc->sc_bmiss_task, 0, wpi_bmiss, sc); 527 528 WPI_LOCK_INIT(sc); 529 WPI_CMD_LOCK_INIT(sc); 530 531 callout_init_mtx(&sc->calib_to, &sc->sc_mtx, 0); 532 callout_init_mtx(&sc->watchdog_to, &sc->sc_mtx, 0); 533 534 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 535 device_printf(dev, "chip is in D%d power mode " 536 "-- setting to D0\n", pci_get_powerstate(dev)); 537 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 538 } 539 540 /* disable the retry timeout register */ 541 pci_write_config(dev, 0x41, 0, 1); 542 543 /* enable bus-mastering */ 544 pci_enable_busmaster(dev); 545 546 sc->mem_rid = PCIR_BAR(0); 547 sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid, 548 RF_ACTIVE); 549 if (sc->mem == NULL) { 550 device_printf(dev, "could not allocate memory resource\n"); 551 error = ENOMEM; 552 goto fail; 553 } 554 555 sc->sc_st = rman_get_bustag(sc->mem); 556 sc->sc_sh = rman_get_bushandle(sc->mem); 557 558 sc->irq_rid = 0; 559 sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid, 560 RF_ACTIVE | RF_SHAREABLE); 561 if (sc->irq == NULL) { 562 device_printf(dev, "could not allocate interrupt resource\n"); 563 error = ENOMEM; 564 goto fail; 565 } 566 567 /* 568 * Allocate DMA memory for firmware transfers. 569 */ 570 if ((error = wpi_alloc_fwmem(sc)) != 0) { 571 printf(": could not allocate firmware memory\n"); 572 error = ENOMEM; 573 goto fail; 574 } 575 576 /* 577 * Put adapter into a known state. 578 */ 579 if ((error = wpi_reset(sc)) != 0) { 580 device_printf(dev, "could not reset adapter\n"); 581 goto fail; 582 } 583 584 wpi_mem_lock(sc); 585 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 586 if (bootverbose || WPI_DEBUG_SET) 587 device_printf(sc->sc_dev, "Hardware Revision (0x%X)\n", tmp); 588 589 wpi_mem_unlock(sc); 590 591 /* Allocate shared page */ 592 if ((error = wpi_alloc_shared(sc)) != 0) { 593 device_printf(dev, "could not allocate shared page\n"); 594 goto fail; 595 } 596 597 /* tx data queues - 4 for QoS purposes */ 598 for (ac = 0; ac < WME_NUM_AC; ac++) { 599 error = wpi_alloc_tx_ring(sc, &sc->txq[ac], WPI_TX_RING_COUNT, ac); 600 if (error != 0) { 601 device_printf(dev, "could not allocate Tx ring %d\n",ac); 602 goto fail; 603 } 604 } 605 606 /* command queue to talk to the card's firmware */ 607 error = wpi_alloc_tx_ring(sc, &sc->cmdq, WPI_CMD_RING_COUNT, 4); 608 if (error != 0) { 609 device_printf(dev, "could not allocate command ring\n"); 610 goto fail; 611 } 612 613 /* receive data queue */ 614 error = wpi_alloc_rx_ring(sc, &sc->rxq); 615 if (error != 0) { 616 device_printf(dev, "could not allocate Rx ring\n"); 617 goto fail; 618 } 619 620 ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211); 621 if (ifp == NULL) { 622 device_printf(dev, "can not if_alloc()\n"); 623 error = ENOMEM; 624 goto fail; 625 } 626 ic = ifp->if_l2com; 627 628 ic->ic_ifp = ifp; 629 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 630 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 631 632 /* set device capabilities */ 633 ic->ic_caps = 634 IEEE80211_C_STA /* station mode supported */ 635 | IEEE80211_C_MONITOR /* monitor mode supported */ 636 | IEEE80211_C_TXPMGT /* tx power management */ 637 | IEEE80211_C_SHSLOT /* short slot time supported */ 638 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 639 | IEEE80211_C_WPA /* 802.11i */ 640/* XXX looks like WME is partly supported? */ 641#if 0 642 | IEEE80211_C_IBSS /* IBSS mode support */ 643 | IEEE80211_C_BGSCAN /* capable of bg scanning */ 644 | IEEE80211_C_WME /* 802.11e */ 645 | IEEE80211_C_HOSTAP /* Host access point mode */ 646#endif 647 ; 648 649 /* 650 * Read in the eeprom and also setup the channels for 651 * net80211. We don't set the rates as net80211 does this for us 652 */ 653 wpi_read_eeprom(sc); 654 655 if (bootverbose || WPI_DEBUG_SET) { 656 device_printf(sc->sc_dev, "Regulatory Domain: %.4s\n", sc->domain); 657 device_printf(sc->sc_dev, "Hardware Type: %c\n", 658 sc->type > 1 ? 'B': '?'); 659 device_printf(sc->sc_dev, "Hardware Revision: %c\n", 660 ((le16toh(sc->rev) & 0xf0) == 0xd0) ? 'D': '?'); 661 device_printf(sc->sc_dev, "SKU %s support 802.11a\n", 662 supportsa ? "does" : "does not"); 663 664 /* XXX hw_config uses the PCIDEV for the Hardware rev. Must check 665 what sc->rev really represents - benjsc 20070615 */ 666 } 667 668 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 669 ifp->if_softc = sc; 670 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 671 ifp->if_init = wpi_init; 672 ifp->if_ioctl = wpi_ioctl; 673 ifp->if_start = wpi_start; 674 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 675 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 676 IFQ_SET_READY(&ifp->if_snd); 677 678 ieee80211_ifattach(ic); 679 /* override default methods */ 680 ic->ic_node_alloc = wpi_node_alloc; 681 ic->ic_newassoc = wpi_newassoc; 682 ic->ic_raw_xmit = wpi_raw_xmit; 683 ic->ic_wme.wme_update = wpi_wme_update; 684 ic->ic_scan_start = wpi_scan_start; 685 ic->ic_scan_end = wpi_scan_end; 686 ic->ic_set_channel = wpi_set_channel; 687 ic->ic_scan_curchan = wpi_scan_curchan; 688 ic->ic_scan_mindwell = wpi_scan_mindwell; 689 690 ic->ic_vap_create = wpi_vap_create; 691 ic->ic_vap_delete = wpi_vap_delete; 692 693 bpfattach(ifp, DLT_IEEE802_11_RADIO, 694 sizeof (struct ieee80211_frame) + sizeof (sc->sc_txtap)); 695 696 sc->sc_rxtap_len = sizeof sc->sc_rxtap; 697 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 698 sc->sc_rxtap.wr_ihdr.it_present = htole32(WPI_RX_RADIOTAP_PRESENT); 699 700 sc->sc_txtap_len = sizeof sc->sc_txtap; 701 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 702 sc->sc_txtap.wt_ihdr.it_present = htole32(WPI_TX_RADIOTAP_PRESENT); 703 704 /* 705 * Hook our interrupt after all initialization is complete. 706 */ 707 error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET |INTR_MPSAFE, 708 NULL, wpi_intr, sc, &sc->sc_ih); 709 if (error != 0) { 710 device_printf(dev, "could not set up interrupt\n"); 711 goto fail; 712 } 713 714 if (bootverbose) 715 ieee80211_announce(ic); 716#ifdef XXX_DEBUG 717 ieee80211_announce_channels(ic); 718#endif 719 return 0; 720 721fail: wpi_detach(dev); 722 return ENXIO; 723} 724 725static int 726wpi_detach(device_t dev) 727{ 728 struct wpi_softc *sc = device_get_softc(dev); 729 struct ifnet *ifp = sc->sc_ifp; 730 struct ieee80211com *ic = ifp->if_l2com; 731 int ac; 732 733 if (ifp != NULL) { 734 wpi_stop(sc); 735 callout_drain(&sc->watchdog_to); 736 callout_drain(&sc->calib_to); 737 bpfdetach(ifp); 738 ieee80211_ifdetach(ic); 739 } 740 741 WPI_LOCK(sc); 742 if (sc->txq[0].data_dmat) { 743 for (ac = 0; ac < WME_NUM_AC; ac++) 744 wpi_free_tx_ring(sc, &sc->txq[ac]); 745 746 wpi_free_tx_ring(sc, &sc->cmdq); 747 wpi_free_rx_ring(sc, &sc->rxq); 748 wpi_free_shared(sc); 749 } 750 751 if (sc->fw_fp != NULL) { 752 wpi_unload_firmware(sc); 753 } 754 755 if (sc->fw_dma.tag) 756 wpi_free_fwmem(sc); 757 WPI_UNLOCK(sc); 758 759 if (sc->irq != NULL) { 760 bus_teardown_intr(dev, sc->irq, sc->sc_ih); 761 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, sc->irq); 762 } 763 764 if (sc->mem != NULL) 765 bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, sc->mem); 766 767 if (ifp != NULL) 768 if_free(ifp); 769 770 taskqueue_free(sc->sc_tq); 771 772 WPI_LOCK_DESTROY(sc); 773 WPI_CMD_LOCK_DESTROY(sc); 774 775 return 0; 776} 777 778static struct ieee80211vap * 779wpi_vap_create(struct ieee80211com *ic, 780 const char name[IFNAMSIZ], int unit, int opmode, int flags, 781 const uint8_t bssid[IEEE80211_ADDR_LEN], 782 const uint8_t mac[IEEE80211_ADDR_LEN]) 783{ 784 struct wpi_vap *wvp; 785 struct ieee80211vap *vap; 786 787 if (!TAILQ_EMPTY(&ic->ic_vaps)) /* only one at a time */ 788 return NULL; 789 wvp = (struct wpi_vap *) malloc(sizeof(struct wpi_vap), 790 M_80211_VAP, M_NOWAIT | M_ZERO); 791 if (wvp == NULL) 792 return NULL; 793 vap = &wvp->vap; 794 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac); 795 /* override with driver methods */ 796 wvp->newstate = vap->iv_newstate; 797 vap->iv_newstate = wpi_newstate; 798 799 ieee80211_amrr_init(&wvp->amrr, vap, 800 IEEE80211_AMRR_MIN_SUCCESS_THRESHOLD, 801 IEEE80211_AMRR_MAX_SUCCESS_THRESHOLD, 802 500 /*ms*/); 803 804 /* complete setup */ 805 ieee80211_vap_attach(vap, ieee80211_media_change, ieee80211_media_status); 806 ic->ic_opmode = opmode; 807 return vap; 808} 809 810static void 811wpi_vap_delete(struct ieee80211vap *vap) 812{ 813 struct wpi_vap *wvp = WPI_VAP(vap); 814 815 ieee80211_amrr_cleanup(&wvp->amrr); 816 ieee80211_vap_detach(vap); 817 free(wvp, M_80211_VAP); 818} 819 820static void 821wpi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 822{ 823 if (error != 0) 824 return; 825 826 KASSERT(nsegs == 1, ("too many DMA segments, %d should be 1", nsegs)); 827 828 *(bus_addr_t *)arg = segs[0].ds_addr; 829} 830 831/* 832 * Allocates a contiguous block of dma memory of the requested size and 833 * alignment. Due to limitations of the FreeBSD dma subsystem as of 20071217, 834 * allocations greater than 4096 may fail. Hence if the requested alignment is 835 * greater we allocate 'alignment' size extra memory and shift the vaddr and 836 * paddr after the dma load. This bypasses the problem at the cost of a little 837 * more memory. 838 */ 839static int 840wpi_dma_contig_alloc(struct wpi_softc *sc, struct wpi_dma_info *dma, 841 void **kvap, bus_size_t size, bus_size_t alignment, int flags) 842{ 843 int error; 844 bus_size_t align; 845 bus_size_t reqsize; 846 847 DPRINTFN(WPI_DEBUG_DMA, 848 ("Size: %zd - alignment %zd\n", size, alignment)); 849 850 dma->size = size; 851 dma->tag = NULL; 852 853 if (alignment > 4096) { 854 align = PAGE_SIZE; 855 reqsize = size + alignment; 856 } else { 857 align = alignment; 858 reqsize = size; 859 } 860 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), align, 861 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, 862 NULL, NULL, reqsize, 863 1, reqsize, flags, 864 NULL, NULL, &dma->tag); 865 if (error != 0) { 866 device_printf(sc->sc_dev, 867 "could not create shared page DMA tag\n"); 868 goto fail; 869 } 870 error = bus_dmamem_alloc(dma->tag, (void **)&dma->vaddr_start, 871 flags | BUS_DMA_ZERO, &dma->map); 872 if (error != 0) { 873 device_printf(sc->sc_dev, 874 "could not allocate shared page DMA memory\n"); 875 goto fail; 876 } 877 878 error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr_start, 879 reqsize, wpi_dma_map_addr, &dma->paddr_start, flags); 880 881 /* Save the original pointers so we can free all the memory */ 882 dma->paddr = dma->paddr_start; 883 dma->vaddr = dma->vaddr_start; 884 885 /* 886 * Check the alignment and increment by 4096 until we get the 887 * requested alignment. Fail if can't obtain the alignment 888 * we requested. 889 */ 890 if ((dma->paddr & (alignment -1 )) != 0) { 891 int i; 892 893 for (i = 0; i < alignment / 4096; i++) { 894 if ((dma->paddr & (alignment - 1 )) == 0) 895 break; 896 dma->paddr += 4096; 897 dma->vaddr += 4096; 898 } 899 if (i == alignment / 4096) { 900 device_printf(sc->sc_dev, 901 "alignment requirement was not satisfied\n"); 902 goto fail; 903 } 904 } 905 906 if (error != 0) { 907 device_printf(sc->sc_dev, 908 "could not load shared page DMA map\n"); 909 goto fail; 910 } 911 912 if (kvap != NULL) 913 *kvap = dma->vaddr; 914 915 return 0; 916 917fail: 918 wpi_dma_contig_free(dma); 919 return error; 920} 921 922static void 923wpi_dma_contig_free(struct wpi_dma_info *dma) 924{ 925 if (dma->tag) { 926 if (dma->map != NULL) { 927 if (dma->paddr_start != 0) { 928 bus_dmamap_sync(dma->tag, dma->map, 929 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 930 bus_dmamap_unload(dma->tag, dma->map); 931 } 932 bus_dmamem_free(dma->tag, &dma->vaddr_start, dma->map); 933 } 934 bus_dma_tag_destroy(dma->tag); 935 } 936} 937 938/* 939 * Allocate a shared page between host and NIC. 940 */ 941static int 942wpi_alloc_shared(struct wpi_softc *sc) 943{ 944 int error; 945 946 error = wpi_dma_contig_alloc(sc, &sc->shared_dma, 947 (void **)&sc->shared, sizeof (struct wpi_shared), 948 PAGE_SIZE, 949 BUS_DMA_NOWAIT); 950 951 if (error != 0) { 952 device_printf(sc->sc_dev, 953 "could not allocate shared area DMA memory\n"); 954 } 955 956 return error; 957} 958 959static void 960wpi_free_shared(struct wpi_softc *sc) 961{ 962 wpi_dma_contig_free(&sc->shared_dma); 963} 964 965static int 966wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 967{ 968 969 int i, error; 970 971 ring->cur = 0; 972 973 error = wpi_dma_contig_alloc(sc, &ring->desc_dma, 974 (void **)&ring->desc, WPI_RX_RING_COUNT * sizeof (uint32_t), 975 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 976 977 if (error != 0) { 978 device_printf(sc->sc_dev, 979 "%s: could not allocate rx ring DMA memory, error %d\n", 980 __func__, error); 981 goto fail; 982 } 983 984 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 985 BUS_SPACE_MAXADDR_32BIT, 986 BUS_SPACE_MAXADDR, NULL, NULL, MJUMPAGESIZE, 1, 987 MJUMPAGESIZE, BUS_DMA_NOWAIT, NULL, NULL, &ring->data_dmat); 988 if (error != 0) { 989 device_printf(sc->sc_dev, 990 "%s: bus_dma_tag_create_failed, error %d\n", 991 __func__, error); 992 goto fail; 993 } 994 995 /* 996 * Setup Rx buffers. 997 */ 998 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 999 struct wpi_rx_data *data = &ring->data[i]; 1000 struct mbuf *m; 1001 bus_addr_t paddr; 1002 1003 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 1004 if (error != 0) { 1005 device_printf(sc->sc_dev, 1006 "%s: bus_dmamap_create failed, error %d\n", 1007 __func__, error); 1008 goto fail; 1009 } 1010 m = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE); 1011 if (m == NULL) { 1012 device_printf(sc->sc_dev, 1013 "%s: could not allocate rx mbuf\n", __func__); 1014 error = ENOMEM; 1015 goto fail; 1016 } 1017 /* map page */ 1018 error = bus_dmamap_load(ring->data_dmat, data->map, 1019 mtod(m, caddr_t), MJUMPAGESIZE, 1020 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT); 1021 if (error != 0 && error != EFBIG) { 1022 device_printf(sc->sc_dev, 1023 "%s: bus_dmamap_load failed, error %d\n", 1024 __func__, error); 1025 m_freem(m); 1026 error = ENOMEM; /* XXX unique code */ 1027 goto fail; 1028 } 1029 bus_dmamap_sync(ring->data_dmat, data->map, 1030 BUS_DMASYNC_PREWRITE); 1031 1032 data->m = m; 1033 ring->desc[i] = htole32(paddr); 1034 } 1035 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 1036 BUS_DMASYNC_PREWRITE); 1037 return 0; 1038fail: 1039 wpi_free_rx_ring(sc, ring); 1040 return error; 1041} 1042 1043static void 1044wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 1045{ 1046 int ntries; 1047 1048 wpi_mem_lock(sc); 1049 1050 WPI_WRITE(sc, WPI_RX_CONFIG, 0); 1051 1052 for (ntries = 0; ntries < 100; ntries++) { 1053 if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE) 1054 break; 1055 DELAY(10); 1056 } 1057 1058 wpi_mem_unlock(sc); 1059 1060#ifdef WPI_DEBUG 1061 if (ntries == 100 && wpi_debug > 0) 1062 device_printf(sc->sc_dev, "timeout resetting Rx ring\n"); 1063#endif 1064 1065 ring->cur = 0; 1066} 1067 1068static void 1069wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 1070{ 1071 int i; 1072 1073 wpi_dma_contig_free(&ring->desc_dma); 1074 1075 for (i = 0; i < WPI_RX_RING_COUNT; i++) 1076 if (ring->data[i].m != NULL) 1077 m_freem(ring->data[i].m); 1078} 1079 1080static int 1081wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int count, 1082 int qid) 1083{ 1084 struct wpi_tx_data *data; 1085 int i, error; 1086 1087 ring->qid = qid; 1088 ring->count = count; 1089 ring->queued = 0; 1090 ring->cur = 0; 1091 ring->data = NULL; 1092 1093 error = wpi_dma_contig_alloc(sc, &ring->desc_dma, 1094 (void **)&ring->desc, count * sizeof (struct wpi_tx_desc), 1095 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 1096 1097 if (error != 0) { 1098 device_printf(sc->sc_dev, "could not allocate tx dma memory\n"); 1099 goto fail; 1100 } 1101 1102 /* update shared page with ring's base address */ 1103 sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr); 1104 1105 error = wpi_dma_contig_alloc(sc, &ring->cmd_dma, (void **)&ring->cmd, 1106 count * sizeof (struct wpi_tx_cmd), WPI_RING_DMA_ALIGN, 1107 BUS_DMA_NOWAIT); 1108 1109 if (error != 0) { 1110 device_printf(sc->sc_dev, 1111 "could not allocate tx command DMA memory\n"); 1112 goto fail; 1113 } 1114 1115 ring->data = malloc(count * sizeof (struct wpi_tx_data), M_DEVBUF, 1116 M_NOWAIT | M_ZERO); 1117 if (ring->data == NULL) { 1118 device_printf(sc->sc_dev, 1119 "could not allocate tx data slots\n"); 1120 goto fail; 1121 } 1122 1123 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 1124 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1125 WPI_MAX_SCATTER - 1, MCLBYTES, BUS_DMA_NOWAIT, NULL, NULL, 1126 &ring->data_dmat); 1127 if (error != 0) { 1128 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 1129 goto fail; 1130 } 1131 1132 for (i = 0; i < count; i++) { 1133 data = &ring->data[i]; 1134 1135 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 1136 if (error != 0) { 1137 device_printf(sc->sc_dev, 1138 "could not create tx buf DMA map\n"); 1139 goto fail; 1140 } 1141 bus_dmamap_sync(ring->data_dmat, data->map, 1142 BUS_DMASYNC_PREWRITE); 1143 } 1144 1145 return 0; 1146 1147fail: 1148 wpi_free_tx_ring(sc, ring); 1149 return error; 1150} 1151 1152static void 1153wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 1154{ 1155 struct wpi_tx_data *data; 1156 int i, ntries; 1157 1158 wpi_mem_lock(sc); 1159 1160 WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0); 1161 for (ntries = 0; ntries < 100; ntries++) { 1162 if (WPI_READ(sc, WPI_TX_STATUS) & WPI_TX_IDLE(ring->qid)) 1163 break; 1164 DELAY(10); 1165 } 1166#ifdef WPI_DEBUG 1167 if (ntries == 100 && wpi_debug > 0) 1168 device_printf(sc->sc_dev, "timeout resetting Tx ring %d\n", 1169 ring->qid); 1170#endif 1171 wpi_mem_unlock(sc); 1172 1173 for (i = 0; i < ring->count; i++) { 1174 data = &ring->data[i]; 1175 1176 if (data->m != NULL) { 1177 bus_dmamap_unload(ring->data_dmat, data->map); 1178 m_freem(data->m); 1179 data->m = NULL; 1180 } 1181 } 1182 1183 ring->queued = 0; 1184 ring->cur = 0; 1185} 1186 1187static void 1188wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 1189{ 1190 struct wpi_tx_data *data; 1191 int i; 1192 1193 wpi_dma_contig_free(&ring->desc_dma); 1194 wpi_dma_contig_free(&ring->cmd_dma); 1195 1196 if (ring->data != NULL) { 1197 for (i = 0; i < ring->count; i++) { 1198 data = &ring->data[i]; 1199 1200 if (data->m != NULL) { 1201 bus_dmamap_sync(ring->data_dmat, data->map, 1202 BUS_DMASYNC_POSTWRITE); 1203 bus_dmamap_unload(ring->data_dmat, data->map); 1204 m_freem(data->m); 1205 data->m = NULL; 1206 } 1207 } 1208 free(ring->data, M_DEVBUF); 1209 } 1210 1211 if (ring->data_dmat != NULL) 1212 bus_dma_tag_destroy(ring->data_dmat); 1213} 1214 1215static int 1216wpi_shutdown(device_t dev) 1217{ 1218 struct wpi_softc *sc = device_get_softc(dev); 1219 1220 WPI_LOCK(sc); 1221 wpi_stop_locked(sc); 1222 wpi_unload_firmware(sc); 1223 WPI_UNLOCK(sc); 1224 1225 return 0; 1226} 1227 1228static int 1229wpi_suspend(device_t dev) 1230{ 1231 struct wpi_softc *sc = device_get_softc(dev); 1232 1233 wpi_stop(sc); 1234 return 0; 1235} 1236 1237static int 1238wpi_resume(device_t dev) 1239{ 1240 struct wpi_softc *sc = device_get_softc(dev); 1241 struct ifnet *ifp = sc->sc_ifp; 1242 1243 pci_write_config(dev, 0x41, 0, 1); 1244 1245 if (ifp->if_flags & IFF_UP) { 1246 wpi_init(ifp->if_softc); 1247 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1248 wpi_start(ifp); 1249 } 1250 return 0; 1251} 1252 1253/* ARGSUSED */ 1254static struct ieee80211_node * 1255wpi_node_alloc(struct ieee80211vap *vap __unused, 1256 const uint8_t mac[IEEE80211_ADDR_LEN] __unused) 1257{ 1258 struct wpi_node *wn; 1259 1260 wn = malloc(sizeof (struct wpi_node), M_80211_NODE, M_NOWAIT | 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 */ 1268static int 1269wpi_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 /* Delay the auth transition until we can update the firmware */ 1283 error = wpi_queue_cmd(sc, WPI_AUTH, arg, WPI_QUEUE_NORMAL); 1284 return (error != 0 ? error : EINPROGRESS); 1285 } 1286 if (nstate == IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_RUN) { 1287 /* set the association id first */ 1288 error = wpi_queue_cmd(sc, WPI_RUN, arg, WPI_QUEUE_NORMAL); 1289 return (error != 0 ? error : EINPROGRESS); 1290 } 1291 if (nstate == IEEE80211_S_RUN) { 1292 /* RUN -> RUN transition; just restart the timers */ 1293 wpi_calib_timeout(sc); 1294 /* XXX split out rate control timer */ 1295 } 1296 return wvp->newstate(vap, nstate, arg); 1297} 1298 1299/* 1300 * Grab exclusive access to NIC memory. 1301 */ 1302static void 1303wpi_mem_lock(struct wpi_softc *sc) 1304{ 1305 int ntries; 1306 uint32_t tmp; 1307 1308 tmp = WPI_READ(sc, WPI_GPIO_CTL); 1309 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC); 1310 1311 /* spin until we actually get the lock */ 1312 for (ntries = 0; ntries < 100; ntries++) { 1313 if ((WPI_READ(sc, WPI_GPIO_CTL) & 1314 (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK) 1315 break; 1316 DELAY(10); 1317 } 1318 if (ntries == 100) 1319 device_printf(sc->sc_dev, "could not lock memory\n"); 1320} 1321 1322/* 1323 * Release lock on NIC memory. 1324 */ 1325static void 1326wpi_mem_unlock(struct wpi_softc *sc) 1327{ 1328 uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL); 1329 WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC); 1330} 1331 1332static uint32_t 1333wpi_mem_read(struct wpi_softc *sc, uint16_t addr) 1334{ 1335 WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr); 1336 return WPI_READ(sc, WPI_READ_MEM_DATA); 1337} 1338 1339static void 1340wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data) 1341{ 1342 WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr); 1343 WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data); 1344} 1345 1346static void 1347wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr, 1348 const uint32_t *data, int wlen) 1349{ 1350 for (; wlen > 0; wlen--, data++, addr+=4) 1351 wpi_mem_write(sc, addr, *data); 1352} 1353 1354/* 1355 * Read data from the EEPROM. We access EEPROM through the MAC instead of 1356 * using the traditional bit-bang method. Data is read up until len bytes have 1357 * been obtained. 1358 */ 1359static uint16_t 1360wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len) 1361{ 1362 int ntries; 1363 uint32_t val; 1364 uint8_t *out = data; 1365 1366 wpi_mem_lock(sc); 1367 1368 for (; len > 0; len -= 2, addr++) { 1369 WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2); 1370 1371 for (ntries = 0; ntries < 10; ntries++) { 1372 if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) & WPI_EEPROM_READY) 1373 break; 1374 DELAY(5); 1375 } 1376 1377 if (ntries == 10) { 1378 device_printf(sc->sc_dev, "could not read EEPROM\n"); 1379 return ETIMEDOUT; 1380 } 1381 1382 *out++= val >> 16; 1383 if (len > 1) 1384 *out ++= val >> 24; 1385 } 1386 1387 wpi_mem_unlock(sc); 1388 1389 return 0; 1390} 1391 1392/* 1393 * The firmware text and data segments are transferred to the NIC using DMA. 1394 * The driver just copies the firmware into DMA-safe memory and tells the NIC 1395 * where to find it. Once the NIC has copied the firmware into its internal 1396 * memory, we can free our local copy in the driver. 1397 */ 1398static int 1399wpi_load_microcode(struct wpi_softc *sc, const uint8_t *fw, int size) 1400{ 1401 int error, ntries; 1402 1403 DPRINTFN(WPI_DEBUG_HW,("Loading microcode size 0x%x\n", size)); 1404 1405 size /= sizeof(uint32_t); 1406 1407 wpi_mem_lock(sc); 1408 1409 wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE, 1410 (const uint32_t *)fw, size); 1411 1412 wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0); 1413 wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT); 1414 wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size); 1415 1416 /* run microcode */ 1417 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN); 1418 1419 /* wait while the adapter is busy copying the firmware */ 1420 for (error = 0, ntries = 0; ntries < 1000; ntries++) { 1421 uint32_t status = WPI_READ(sc, WPI_TX_STATUS); 1422 DPRINTFN(WPI_DEBUG_HW, 1423 ("firmware status=0x%x, val=0x%x, result=0x%x\n", status, 1424 WPI_TX_IDLE(6), status & WPI_TX_IDLE(6))); 1425 if (status & WPI_TX_IDLE(6)) { 1426 DPRINTFN(WPI_DEBUG_HW, 1427 ("Status Match! - ntries = %d\n", ntries)); 1428 break; 1429 } 1430 DELAY(10); 1431 } 1432 if (ntries == 1000) { 1433 device_printf(sc->sc_dev, "timeout transferring firmware\n"); 1434 error = ETIMEDOUT; 1435 } 1436 1437 /* start the microcode executing */ 1438 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE); 1439 1440 wpi_mem_unlock(sc); 1441 1442 return (error); 1443} 1444 1445static void 1446wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, 1447 struct wpi_rx_data *data) 1448{ 1449 struct ifnet *ifp = sc->sc_ifp; 1450 struct ieee80211com *ic = ifp->if_l2com; 1451 struct wpi_rx_ring *ring = &sc->rxq; 1452 struct wpi_rx_stat *stat; 1453 struct wpi_rx_head *head; 1454 struct wpi_rx_tail *tail; 1455 struct ieee80211_node *ni; 1456 struct mbuf *m, *mnew; 1457 bus_addr_t paddr; 1458 int error; 1459 1460 stat = (struct wpi_rx_stat *)(desc + 1); 1461 1462 if (stat->len > WPI_STAT_MAXLEN) { 1463 device_printf(sc->sc_dev, "invalid rx statistic header\n"); 1464 ifp->if_ierrors++; 1465 return; 1466 } 1467 1468 head = (struct wpi_rx_head *)((caddr_t)(stat + 1) + stat->len); 1469 tail = (struct wpi_rx_tail *)((caddr_t)(head + 1) + le16toh(head->len)); 1470 1471 DPRINTFN(WPI_DEBUG_RX, ("rx intr: idx=%d len=%d stat len=%d rssi=%d " 1472 "rate=%x chan=%d tstamp=%ju\n", ring->cur, le32toh(desc->len), 1473 le16toh(head->len), (int8_t)stat->rssi, head->rate, head->chan, 1474 (uintmax_t)le64toh(tail->tstamp))); 1475 1476 /* discard Rx frames with bad CRC early */ 1477 if ((le32toh(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) { 1478 DPRINTFN(WPI_DEBUG_RX, ("%s: rx flags error %x\n", __func__, 1479 le32toh(tail->flags))); 1480 ifp->if_ierrors++; 1481 return; 1482 } 1483 if (le16toh(head->len) < sizeof (struct ieee80211_frame)) { 1484 DPRINTFN(WPI_DEBUG_RX, ("%s: frame too short: %d\n", __func__, 1485 le16toh(head->len))); 1486 ifp->if_ierrors++; 1487 return; 1488 } 1489 1490 /* XXX don't need mbuf, just dma buffer */ 1491 mnew = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE); 1492 if (mnew == NULL) { 1493 DPRINTFN(WPI_DEBUG_RX, ("%s: no mbuf to restock ring\n", 1494 __func__)); 1495 ifp->if_ierrors++; 1496 return; 1497 } 1498 error = bus_dmamap_load(ring->data_dmat, data->map, 1499 mtod(mnew, caddr_t), MJUMPAGESIZE, 1500 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT); 1501 if (error != 0 && error != EFBIG) { 1502 device_printf(sc->sc_dev, 1503 "%s: bus_dmamap_load failed, error %d\n", __func__, error); 1504 m_freem(mnew); 1505 ifp->if_ierrors++; 1506 return; 1507 } 1508 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1509 1510 /* finalize mbuf and swap in new one */ 1511 m = data->m; 1512 m->m_pkthdr.rcvif = ifp; 1513 m->m_data = (caddr_t)(head + 1); 1514 m->m_pkthdr.len = m->m_len = le16toh(head->len); 1515 1516 data->m = mnew; 1517 /* update Rx descriptor */ 1518 ring->desc[ring->cur] = htole32(paddr); 1519 1520 if (bpf_peers_present(ifp->if_bpf)) { 1521 struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap; 1522 1523 tap->wr_flags = 0; 1524 tap->wr_chan_freq = 1525 htole16(ic->ic_channels[head->chan].ic_freq); 1526 tap->wr_chan_flags = 1527 htole16(ic->ic_channels[head->chan].ic_flags); 1528 tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET); 1529 tap->wr_dbm_antnoise = (int8_t)le16toh(stat->noise); 1530 tap->wr_tsft = tail->tstamp; 1531 tap->wr_antenna = (le16toh(head->flags) >> 4) & 0xf; 1532 switch (head->rate) { 1533 /* CCK rates */ 1534 case 10: tap->wr_rate = 2; break; 1535 case 20: tap->wr_rate = 4; break; 1536 case 55: tap->wr_rate = 11; break; 1537 case 110: tap->wr_rate = 22; break; 1538 /* OFDM rates */ 1539 case 0xd: tap->wr_rate = 12; break; 1540 case 0xf: tap->wr_rate = 18; break; 1541 case 0x5: tap->wr_rate = 24; break; 1542 case 0x7: tap->wr_rate = 36; break; 1543 case 0x9: tap->wr_rate = 48; break; 1544 case 0xb: tap->wr_rate = 72; break; 1545 case 0x1: tap->wr_rate = 96; break; 1546 case 0x3: tap->wr_rate = 108; break; 1547 /* unknown rate: should not happen */ 1548 default: tap->wr_rate = 0; 1549 } 1550 if (le16toh(head->flags) & 0x4) 1551 tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; 1552 1553 bpf_mtap2(ifp->if_bpf, tap, sc->sc_rxtap_len, m); 1554 } 1555 1556 WPI_UNLOCK(sc); 1557 1558 ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *)); 1559 if (ni != NULL) { 1560 (void) ieee80211_input(ni, m, stat->rssi, 0, 0); 1561 ieee80211_free_node(ni); 1562 } else 1563 (void) ieee80211_input_all(ic, m, stat->rssi, 0, 0); 1564 1565 WPI_LOCK(sc); 1566} 1567 1568static void 1569wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1570{ 1571 struct ifnet *ifp = sc->sc_ifp; 1572 struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3]; 1573 struct wpi_tx_data *txdata = &ring->data[desc->idx]; 1574 struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1); 1575 struct wpi_node *wn = (struct wpi_node *)txdata->ni; 1576 1577 DPRINTFN(WPI_DEBUG_TX, ("tx done: qid=%d idx=%d retries=%d nkill=%d " 1578 "rate=%x duration=%d status=%x\n", desc->qid, desc->idx, 1579 stat->ntries, stat->nkill, stat->rate, le32toh(stat->duration), 1580 le32toh(stat->status))); 1581 1582 /* 1583 * Update rate control statistics for the node. 1584 * XXX we should not count mgmt frames since they're always sent at 1585 * the lowest available bit-rate. 1586 * XXX frames w/o ACK shouldn't be used either 1587 */ 1588 wn->amn.amn_txcnt++; 1589 if (stat->ntries > 0) { 1590 DPRINTFN(WPI_DEBUG_TX, ("%d retries\n", stat->ntries)); 1591 wn->amn.amn_retrycnt++; 1592 } 1593 1594 /* XXX oerrors should only count errors !maxtries */ 1595 if ((le32toh(stat->status) & 0xff) != 1) 1596 ifp->if_oerrors++; 1597 else 1598 ifp->if_opackets++; 1599 1600 bus_dmamap_sync(ring->data_dmat, txdata->map, BUS_DMASYNC_POSTWRITE); 1601 bus_dmamap_unload(ring->data_dmat, txdata->map); 1602 /* XXX handle M_TXCB? */ 1603 m_freem(txdata->m); 1604 txdata->m = NULL; 1605 ieee80211_free_node(txdata->ni); 1606 txdata->ni = NULL; 1607 1608 ring->queued--; 1609 1610 sc->sc_tx_timer = 0; 1611 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1612 wpi_start_locked(ifp); 1613} 1614 1615static void 1616wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1617{ 1618 struct wpi_tx_ring *ring = &sc->cmdq; 1619 struct wpi_tx_data *data; 1620 1621 DPRINTFN(WPI_DEBUG_CMD, ("cmd notification qid=%x idx=%d flags=%x " 1622 "type=%s len=%d\n", desc->qid, desc->idx, 1623 desc->flags, wpi_cmd_str(desc->type), 1624 le32toh(desc->len))); 1625 1626 if ((desc->qid & 7) != 4) 1627 return; /* not a command ack */ 1628 1629 data = &ring->data[desc->idx]; 1630 1631 /* if the command was mapped in a mbuf, free it */ 1632 if (data->m != NULL) { 1633 bus_dmamap_unload(ring->data_dmat, data->map); 1634 m_freem(data->m); 1635 data->m = NULL; 1636 } 1637 1638 sc->flags &= ~WPI_FLAG_BUSY; 1639 wakeup(&ring->cmd[desc->idx]); 1640} 1641 1642static void 1643wpi_bmiss(void *arg, int npending) 1644{ 1645 struct wpi_softc *sc = arg; 1646 struct ieee80211com *ic = sc->sc_ifp->if_l2com; 1647 1648 ieee80211_beacon_miss(ic); 1649} 1650 1651static void 1652wpi_notif_intr(struct wpi_softc *sc) 1653{ 1654 struct ifnet *ifp = sc->sc_ifp; 1655 struct ieee80211com *ic = ifp->if_l2com; 1656 struct wpi_rx_desc *desc; 1657 struct wpi_rx_data *data; 1658 uint32_t hw; 1659 1660 hw = le32toh(sc->shared->next); 1661 while (sc->rxq.cur != hw) { 1662 data = &sc->rxq.data[sc->rxq.cur]; 1663 desc = (void *)data->m->m_ext.ext_buf; 1664 1665 DPRINTFN(WPI_DEBUG_NOTIFY, 1666 ("notify qid=%x idx=%d flags=%x type=%d len=%d\n", 1667 desc->qid, 1668 desc->idx, 1669 desc->flags, 1670 desc->type, 1671 le32toh(desc->len))); 1672 1673 if (!(desc->qid & 0x80)) /* reply to a command */ 1674 wpi_cmd_intr(sc, desc); 1675 1676 switch (desc->type) { 1677 case WPI_RX_DONE: 1678 /* a 802.11 frame was received */ 1679 wpi_rx_intr(sc, desc, data); 1680 break; 1681 1682 case WPI_TX_DONE: 1683 /* a 802.11 frame has been transmitted */ 1684 wpi_tx_intr(sc, desc); 1685 break; 1686 1687 case WPI_UC_READY: 1688 { 1689 struct wpi_ucode_info *uc = 1690 (struct wpi_ucode_info *)(desc + 1); 1691 1692 /* the microcontroller is ready */ 1693 DPRINTF(("microcode alive notification version %x " 1694 "alive %x\n", le32toh(uc->version), 1695 le32toh(uc->valid))); 1696 1697 if (le32toh(uc->valid) != 1) { 1698 device_printf(sc->sc_dev, 1699 "microcontroller initialization failed\n"); 1700 wpi_stop_locked(sc); 1701 } 1702 break; 1703 } 1704 case WPI_STATE_CHANGED: 1705 { 1706 uint32_t *status = (uint32_t *)(desc + 1); 1707 1708 /* enabled/disabled notification */ 1709 DPRINTF(("state changed to %x\n", le32toh(*status))); 1710 1711 if (le32toh(*status) & 1) { 1712 device_printf(sc->sc_dev, 1713 "Radio transmitter is switched off\n"); 1714 sc->flags |= WPI_FLAG_HW_RADIO_OFF; 1715 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1716 /* Disable firmware commands */ 1717 WPI_WRITE(sc, WPI_UCODE_SET, WPI_DISABLE_CMD); 1718 } 1719 break; 1720 } 1721 case WPI_START_SCAN: 1722 { 1723#ifdef WPI_DEBUG 1724 struct wpi_start_scan *scan = 1725 (struct wpi_start_scan *)(desc + 1); 1726#endif 1727 1728 DPRINTFN(WPI_DEBUG_SCANNING, 1729 ("scanning channel %d status %x\n", 1730 scan->chan, le32toh(scan->status))); 1731 break; 1732 } 1733 case WPI_STOP_SCAN: 1734 { 1735#ifdef WPI_DEBUG 1736 struct wpi_stop_scan *scan = 1737 (struct wpi_stop_scan *)(desc + 1); 1738#endif 1739 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 1740 1741 DPRINTFN(WPI_DEBUG_SCANNING, 1742 ("scan finished nchan=%d status=%d chan=%d\n", 1743 scan->nchan, scan->status, scan->chan)); 1744 1745 sc->sc_scan_timer = 0; 1746 ieee80211_scan_next(vap); 1747 break; 1748 } 1749 case WPI_MISSED_BEACON: 1750 { 1751 struct wpi_missed_beacon *beacon = 1752 (struct wpi_missed_beacon *)(desc + 1); 1753 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 1754 1755 if (le32toh(beacon->consecutive) >= 1756 vap->iv_bmissthreshold) { 1757 DPRINTF(("Beacon miss: %u >= %u\n", 1758 le32toh(beacon->consecutive), 1759 vap->iv_bmissthreshold)); 1760 taskqueue_enqueue(taskqueue_swi, 1761 &sc->sc_bmiss_task); 1762 } 1763 break; 1764 } 1765 } 1766 1767 sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT; 1768 } 1769 1770 /* tell the firmware what we have processed */ 1771 hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1; 1772 WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7); 1773} 1774 1775static void 1776wpi_intr(void *arg) 1777{ 1778 struct wpi_softc *sc = arg; 1779 uint32_t r; 1780 1781 WPI_LOCK(sc); 1782 1783 r = WPI_READ(sc, WPI_INTR); 1784 if (r == 0 || r == 0xffffffff) { 1785 WPI_UNLOCK(sc); 1786 return; 1787 } 1788 1789 /* disable interrupts */ 1790 WPI_WRITE(sc, WPI_MASK, 0); 1791 /* ack interrupts */ 1792 WPI_WRITE(sc, WPI_INTR, r); 1793 1794 if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) { 1795 device_printf(sc->sc_dev, "fatal firmware error\n"); 1796 DPRINTFN(6,("(%s)\n", (r & WPI_SW_ERROR) ? "(Software Error)" : 1797 "(Hardware Error)")); 1798 wpi_queue_cmd(sc, WPI_RESTART, 0, WPI_QUEUE_CLEAR); 1799 sc->flags &= ~WPI_FLAG_BUSY; 1800 WPI_UNLOCK(sc); 1801 return; 1802 } 1803 1804 if (r & WPI_RX_INTR) 1805 wpi_notif_intr(sc); 1806 1807 if (r & WPI_ALIVE_INTR) /* firmware initialized */ 1808 wakeup(sc); 1809 1810 /* re-enable interrupts */ 1811 if (sc->sc_ifp->if_flags & IFF_UP) 1812 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 1813 1814 WPI_UNLOCK(sc); 1815} 1816 1817static uint8_t 1818wpi_plcp_signal(int rate) 1819{ 1820 switch (rate) { 1821 /* CCK rates (returned values are device-dependent) */ 1822 case 2: return 10; 1823 case 4: return 20; 1824 case 11: return 55; 1825 case 22: return 110; 1826 1827 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1828 /* R1-R4 (ral/ural is R4-R1) */ 1829 case 12: return 0xd; 1830 case 18: return 0xf; 1831 case 24: return 0x5; 1832 case 36: return 0x7; 1833 case 48: return 0x9; 1834 case 72: return 0xb; 1835 case 96: return 0x1; 1836 case 108: return 0x3; 1837 1838 /* unsupported rates (should not get there) */ 1839 default: return 0; 1840 } 1841} 1842 1843/* quickly determine if a given rate is CCK or OFDM */ 1844#define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1845 1846/* 1847 * Construct the data packet for a transmit buffer and acutally put 1848 * the buffer onto the transmit ring, kicking the card to process the 1849 * the buffer. 1850 */ 1851static int 1852wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, 1853 int ac) 1854{ 1855 struct ieee80211vap *vap = ni->ni_vap; 1856 struct ifnet *ifp = sc->sc_ifp; 1857 struct ieee80211com *ic = ifp->if_l2com; 1858 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1859 struct wpi_tx_ring *ring = &sc->txq[ac]; 1860 struct wpi_tx_desc *desc; 1861 struct wpi_tx_data *data; 1862 struct wpi_tx_cmd *cmd; 1863 struct wpi_cmd_data *tx; 1864 struct ieee80211_frame *wh; 1865 const struct ieee80211_txparam *tp; 1866 struct ieee80211_key *k; 1867 struct mbuf *mnew; 1868 int i, error, nsegs, rate, hdrlen, ismcast; 1869 bus_dma_segment_t segs[WPI_MAX_SCATTER]; 1870 1871 desc = &ring->desc[ring->cur]; 1872 data = &ring->data[ring->cur]; 1873 1874 wh = mtod(m0, struct ieee80211_frame *); 1875 1876 hdrlen = ieee80211_hdrsize(wh); 1877 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1878 1879 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1880 k = ieee80211_crypto_encap(ni, m0); 1881 if (k == NULL) { 1882 m_freem(m0); 1883 return ENOBUFS; 1884 } 1885 /* packet header may have moved, reset our local pointer */ 1886 wh = mtod(m0, struct ieee80211_frame *); 1887 } 1888 1889 cmd = &ring->cmd[ring->cur]; 1890 cmd->code = WPI_CMD_TX_DATA; 1891 cmd->flags = 0; 1892 cmd->qid = ring->qid; 1893 cmd->idx = ring->cur; 1894 1895 tx = (struct wpi_cmd_data *)cmd->data; 1896 tx->flags = htole32(WPI_TX_AUTO_SEQ); 1897 tx->timeout = htole16(0); 1898 tx->ofdm_mask = 0xff; 1899 tx->cck_mask = 0x0f; 1900 tx->lifetime = htole32(WPI_LIFETIME_INFINITE); 1901 tx->id = ismcast ? WPI_ID_BROADCAST : WPI_ID_BSS; 1902 tx->len = htole16(m0->m_pkthdr.len); 1903 1904 if (!ismcast) { 1905 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0 || 1906 !cap->cap_wmeParams[ac].wmep_noackPolicy) 1907 tx->flags |= htole32(WPI_TX_NEED_ACK); 1908 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold) { 1909 tx->flags |= htole32(WPI_TX_NEED_RTS|WPI_TX_FULL_TXOP); 1910 tx->rts_ntries = 7; 1911 } 1912 } 1913 /* pick a rate */ 1914 tp = &vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)]; 1915 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_MGT) { 1916 uint8_t subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1917 /* tell h/w to set timestamp in probe responses */ 1918 if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1919 tx->flags |= htole32(WPI_TX_INSERT_TSTAMP); 1920 if (subtype == IEEE80211_FC0_SUBTYPE_ASSOC_REQ || 1921 subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) 1922 tx->timeout = htole16(3); 1923 else 1924 tx->timeout = htole16(2); 1925 rate = tp->mgmtrate; 1926 } else if (ismcast) { 1927 rate = tp->mcastrate; 1928 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) { 1929 rate = tp->ucastrate; 1930 } else { 1931 (void) ieee80211_amrr_choose(ni, &WPI_NODE(ni)->amn); 1932 rate = ni->ni_txrate; 1933 } 1934 tx->rate = wpi_plcp_signal(rate); 1935 1936 /* be very persistant at sending frames out */ 1937#if 0 1938 tx->data_ntries = tp->maxretry; 1939#else 1940 tx->data_ntries = 15; /* XXX way too high */ 1941#endif 1942 1943 if (bpf_peers_present(ifp->if_bpf)) { 1944 struct wpi_tx_radiotap_header *tap = &sc->sc_txtap; 1945 tap->wt_flags = 0; 1946 tap->wt_chan_freq = htole16(ni->ni_chan->ic_freq); 1947 tap->wt_chan_flags = htole16(ni->ni_chan->ic_flags); 1948 tap->wt_rate = rate; 1949 tap->wt_hwqueue = ac; 1950 if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1951 tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1952 1953 bpf_mtap2(ifp->if_bpf, tap, sc->sc_txtap_len, m0); 1954 } 1955 1956 /* save and trim IEEE802.11 header */ 1957 m_copydata(m0, 0, hdrlen, (caddr_t)&tx->wh); 1958 m_adj(m0, hdrlen); 1959 1960 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map, m0, segs, 1961 &nsegs, BUS_DMA_NOWAIT); 1962 if (error != 0 && error != EFBIG) { 1963 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1964 error); 1965 m_freem(m0); 1966 return error; 1967 } 1968 if (error != 0) { 1969 /* XXX use m_collapse */ 1970 mnew = m_defrag(m0, M_DONTWAIT); 1971 if (mnew == NULL) { 1972 device_printf(sc->sc_dev, 1973 "could not defragment mbuf\n"); 1974 m_freem(m0); 1975 return ENOBUFS; 1976 } 1977 m0 = mnew; 1978 1979 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map, 1980 m0, segs, &nsegs, BUS_DMA_NOWAIT); 1981 if (error != 0) { 1982 device_printf(sc->sc_dev, 1983 "could not map mbuf (error %d)\n", error); 1984 m_freem(m0); 1985 return error; 1986 } 1987 } 1988 1989 data->m = m0; 1990 data->ni = ni; 1991 1992 DPRINTFN(WPI_DEBUG_TX, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n", 1993 ring->qid, ring->cur, m0->m_pkthdr.len, nsegs)); 1994 1995 /* first scatter/gather segment is used by the tx data command */ 1996 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 1997 (1 + nsegs) << 24); 1998 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 1999 ring->cur * sizeof (struct wpi_tx_cmd)); 2000 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data)); 2001 for (i = 1; i <= nsegs; i++) { 2002 desc->segs[i].addr = htole32(segs[i - 1].ds_addr); 2003 desc->segs[i].len = htole32(segs[i - 1].ds_len); 2004 } 2005 2006 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 2007 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 2008 BUS_DMASYNC_PREWRITE); 2009 2010 ring->queued++; 2011 2012 /* kick ring */ 2013 ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT; 2014 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2015 2016 return 0; 2017} 2018 2019/** 2020 * Process data waiting to be sent on the IFNET output queue 2021 */ 2022static void 2023wpi_start(struct ifnet *ifp) 2024{ 2025 struct wpi_softc *sc = ifp->if_softc; 2026 2027 WPI_LOCK(sc); 2028 wpi_start_locked(ifp); 2029 WPI_UNLOCK(sc); 2030} 2031 2032static void 2033wpi_start_locked(struct ifnet *ifp) 2034{ 2035 struct wpi_softc *sc = ifp->if_softc; 2036 struct ieee80211_node *ni; 2037 struct mbuf *m; 2038 int ac; 2039 2040 WPI_LOCK_ASSERT(sc); 2041 2042 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 2043 return; 2044 2045 for (;;) { 2046 IFQ_DRV_DEQUEUE(&ifp->if_snd, m); 2047 if (m == NULL) 2048 break; 2049 /* no QoS encapsulation for EAPOL frames */ 2050 ac = M_WME_GETAC(m); 2051 if (sc->txq[ac].queued > sc->txq[ac].count - 8) { 2052 /* there is no place left in this ring */ 2053 IFQ_DRV_PREPEND(&ifp->if_snd, m); 2054 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2055 break; 2056 } 2057 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 2058 m = ieee80211_encap(ni, m); 2059 if (m == NULL) { 2060 ieee80211_free_node(ni); 2061 ifp->if_oerrors++; 2062 continue; 2063 } 2064 if (wpi_tx_data(sc, m, ni, ac) != 0) { 2065 ieee80211_free_node(ni); 2066 ifp->if_oerrors++; 2067 break; 2068 } 2069 sc->sc_tx_timer = 5; 2070 } 2071} 2072 2073static int 2074wpi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2075 const struct ieee80211_bpf_params *params) 2076{ 2077 struct ieee80211com *ic = ni->ni_ic; 2078 struct ifnet *ifp = ic->ic_ifp; 2079 struct wpi_softc *sc = ifp->if_softc; 2080 2081 /* prevent management frames from being sent if we're not ready */ 2082 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 2083 m_freem(m); 2084 ieee80211_free_node(ni); 2085 return ENETDOWN; 2086 } 2087 WPI_LOCK(sc); 2088 2089 /* management frames go into ring 0 */ 2090 if (sc->txq[0].queued > sc->txq[0].count - 8) { 2091 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2092 m_freem(m); 2093 WPI_UNLOCK(sc); 2094 ieee80211_free_node(ni); 2095 return ENOBUFS; /* XXX */ 2096 } 2097 2098 ifp->if_opackets++; 2099 if (wpi_tx_data(sc, m, ni, 0) != 0) 2100 goto bad; 2101 sc->sc_tx_timer = 5; 2102 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc); 2103 2104 WPI_UNLOCK(sc); 2105 return 0; 2106bad: 2107 ifp->if_oerrors++; 2108 WPI_UNLOCK(sc); 2109 ieee80211_free_node(ni); 2110 return EIO; /* XXX */ 2111} 2112 2113static int 2114wpi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2115{ 2116 struct wpi_softc *sc = ifp->if_softc; 2117 struct ieee80211com *ic = ifp->if_l2com; 2118 struct ifreq *ifr = (struct ifreq *) data; 2119 int error = 0, startall = 0; 2120 2121 switch (cmd) { 2122 case SIOCSIFFLAGS: 2123 WPI_LOCK(sc); 2124 if ((ifp->if_flags & IFF_UP)) { 2125 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 2126 wpi_init_locked(sc, 0); 2127 startall = 1; 2128 } 2129 } else if ((ifp->if_drv_flags & IFF_DRV_RUNNING) || 2130 (sc->flags & WPI_FLAG_HW_RADIO_OFF)) 2131 wpi_stop_locked(sc); 2132 WPI_UNLOCK(sc); 2133 if (startall) 2134 ieee80211_start_all(ic); 2135 break; 2136 case SIOCGIFMEDIA: 2137 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd); 2138 break; 2139 case SIOCGIFADDR: 2140 error = ether_ioctl(ifp, cmd, data); 2141 break; 2142 default: 2143 error = EINVAL; 2144 break; 2145 } 2146 return error; 2147} 2148 2149/* 2150 * Extract various information from EEPROM. 2151 */ 2152static void 2153wpi_read_eeprom(struct wpi_softc *sc) 2154{ 2155 struct ifnet *ifp = sc->sc_ifp; 2156 struct ieee80211com *ic = ifp->if_l2com; 2157 int i; 2158 2159 /* read the hardware capabilities, revision and SKU type */ 2160 wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap,1); 2161 wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev,2); 2162 wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1); 2163 2164 /* read the regulatory domain */ 2165 wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, sc->domain, 4); 2166 2167 /* read in the hw MAC address */ 2168 wpi_read_prom_data(sc, WPI_EEPROM_MAC, ic->ic_myaddr, 6); 2169 2170 /* read the list of authorized channels */ 2171 for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++) 2172 wpi_read_eeprom_channels(sc,i); 2173 2174 /* read the power level calibration info for each group */ 2175 for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++) 2176 wpi_read_eeprom_group(sc,i); 2177} 2178 2179/* 2180 * Send a command to the firmware. 2181 */ 2182static int 2183wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async) 2184{ 2185 struct wpi_tx_ring *ring = &sc->cmdq; 2186 struct wpi_tx_desc *desc; 2187 struct wpi_tx_cmd *cmd; 2188 2189#ifdef WPI_DEBUG 2190 if (!async) { 2191 WPI_LOCK_ASSERT(sc); 2192 } 2193#endif 2194 2195 DPRINTFN(WPI_DEBUG_CMD,("wpi_cmd %d size %d async %d\n", code, size, 2196 async)); 2197 2198 if (sc->flags & WPI_FLAG_BUSY) { 2199 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n", 2200 __func__, code); 2201 return EAGAIN; 2202 } 2203 sc->flags|= WPI_FLAG_BUSY; 2204 2205 KASSERT(size <= sizeof cmd->data, ("command %d too large: %d bytes", 2206 code, size)); 2207 2208 desc = &ring->desc[ring->cur]; 2209 cmd = &ring->cmd[ring->cur]; 2210 2211 cmd->code = code; 2212 cmd->flags = 0; 2213 cmd->qid = ring->qid; 2214 cmd->idx = ring->cur; 2215 memcpy(cmd->data, buf, size); 2216 2217 desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24); 2218 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2219 ring->cur * sizeof (struct wpi_tx_cmd)); 2220 desc->segs[0].len = htole32(4 + size); 2221 2222 /* kick cmd ring */ 2223 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2224 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2225 2226 if (async) { 2227 sc->flags &= ~ WPI_FLAG_BUSY; 2228 return 0; 2229 } 2230 2231 return msleep(cmd, &sc->sc_mtx, PCATCH, "wpicmd", hz); 2232} 2233 2234static int 2235wpi_wme_update(struct ieee80211com *ic) 2236{ 2237#define WPI_EXP2(v) htole16((1 << (v)) - 1) 2238#define WPI_USEC(v) htole16(IEEE80211_TXOP_TO_US(v)) 2239 struct wpi_softc *sc = ic->ic_ifp->if_softc; 2240 const struct wmeParams *wmep; 2241 struct wpi_wme_setup wme; 2242 int ac; 2243 2244 /* don't override default WME values if WME is not actually enabled */ 2245 if (!(ic->ic_flags & IEEE80211_F_WME)) 2246 return 0; 2247 2248 wme.flags = 0; 2249 for (ac = 0; ac < WME_NUM_AC; ac++) { 2250 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 2251 wme.ac[ac].aifsn = wmep->wmep_aifsn; 2252 wme.ac[ac].cwmin = WPI_EXP2(wmep->wmep_logcwmin); 2253 wme.ac[ac].cwmax = WPI_EXP2(wmep->wmep_logcwmax); 2254 wme.ac[ac].txop = WPI_USEC(wmep->wmep_txopLimit); 2255 2256 DPRINTF(("setting WME for queue %d aifsn=%d cwmin=%d cwmax=%d " 2257 "txop=%d\n", ac, wme.ac[ac].aifsn, wme.ac[ac].cwmin, 2258 wme.ac[ac].cwmax, wme.ac[ac].txop)); 2259 } 2260 return wpi_cmd(sc, WPI_CMD_SET_WME, &wme, sizeof wme, 1); 2261#undef WPI_USEC 2262#undef WPI_EXP2 2263} 2264 2265/* 2266 * Configure h/w multi-rate retries. 2267 */ 2268static int 2269wpi_mrr_setup(struct wpi_softc *sc) 2270{ 2271 struct ifnet *ifp = sc->sc_ifp; 2272 struct ieee80211com *ic = ifp->if_l2com; 2273 struct wpi_mrr_setup mrr; 2274 int i, error; 2275 2276 memset(&mrr, 0, sizeof (struct wpi_mrr_setup)); 2277 2278 /* CCK rates (not used with 802.11a) */ 2279 for (i = WPI_CCK1; i <= WPI_CCK11; i++) { 2280 mrr.rates[i].flags = 0; 2281 mrr.rates[i].signal = wpi_ridx_to_plcp[i]; 2282 /* fallback to the immediate lower CCK rate (if any) */ 2283 mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1; 2284 /* try one time at this rate before falling back to "next" */ 2285 mrr.rates[i].ntries = 1; 2286 } 2287 2288 /* OFDM rates (not used with 802.11b) */ 2289 for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) { 2290 mrr.rates[i].flags = 0; 2291 mrr.rates[i].signal = wpi_ridx_to_plcp[i]; 2292 /* fallback to the immediate lower OFDM rate (if any) */ 2293 /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */ 2294 mrr.rates[i].next = (i == WPI_OFDM6) ? 2295 ((ic->ic_curmode == IEEE80211_MODE_11A) ? 2296 WPI_OFDM6 : WPI_CCK2) : 2297 i - 1; 2298 /* try one time at this rate before falling back to "next" */ 2299 mrr.rates[i].ntries = 1; 2300 } 2301 2302 /* setup MRR for control frames */ 2303 mrr.which = htole32(WPI_MRR_CTL); 2304 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2305 if (error != 0) { 2306 device_printf(sc->sc_dev, 2307 "could not setup MRR for control frames\n"); 2308 return error; 2309 } 2310 2311 /* setup MRR for data frames */ 2312 mrr.which = htole32(WPI_MRR_DATA); 2313 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2314 if (error != 0) { 2315 device_printf(sc->sc_dev, 2316 "could not setup MRR for data frames\n"); 2317 return error; 2318 } 2319 2320 return 0; 2321} 2322 2323static void 2324wpi_set_led(struct wpi_softc *sc, uint8_t which, uint8_t off, uint8_t on) 2325{ 2326 struct wpi_cmd_led led; 2327 2328 led.which = which; 2329 led.unit = htole32(100000); /* on/off in unit of 100ms */ 2330 led.off = off; 2331 led.on = on; 2332 2333 (void)wpi_cmd(sc, WPI_CMD_SET_LED, &led, sizeof led, 1); 2334} 2335 2336static void 2337wpi_enable_tsf(struct wpi_softc *sc, struct ieee80211_node *ni) 2338{ 2339 struct wpi_cmd_tsf tsf; 2340 uint64_t val, mod; 2341 2342 memset(&tsf, 0, sizeof tsf); 2343 memcpy(&tsf.tstamp, ni->ni_tstamp.data, 8); 2344 tsf.bintval = htole16(ni->ni_intval); 2345 tsf.lintval = htole16(10); 2346 2347 /* compute remaining time until next beacon */ 2348 val = (uint64_t)ni->ni_intval * 1024; /* msec -> usec */ 2349 mod = le64toh(tsf.tstamp) % val; 2350 tsf.binitval = htole32((uint32_t)(val - mod)); 2351 2352 if (wpi_cmd(sc, WPI_CMD_TSF, &tsf, sizeof tsf, 1) != 0) 2353 device_printf(sc->sc_dev, "could not enable TSF\n"); 2354} 2355 2356#if 0 2357/* 2358 * Build a beacon frame that the firmware will broadcast periodically in 2359 * IBSS or HostAP modes. 2360 */ 2361static int 2362wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni) 2363{ 2364 struct ifnet *ifp = sc->sc_ifp; 2365 struct ieee80211com *ic = ifp->if_l2com; 2366 struct wpi_tx_ring *ring = &sc->cmdq; 2367 struct wpi_tx_desc *desc; 2368 struct wpi_tx_data *data; 2369 struct wpi_tx_cmd *cmd; 2370 struct wpi_cmd_beacon *bcn; 2371 struct ieee80211_beacon_offsets bo; 2372 struct mbuf *m0; 2373 bus_addr_t physaddr; 2374 int error; 2375 2376 desc = &ring->desc[ring->cur]; 2377 data = &ring->data[ring->cur]; 2378 2379 m0 = ieee80211_beacon_alloc(ic, ni, &bo); 2380 if (m0 == NULL) { 2381 device_printf(sc->sc_dev, "could not allocate beacon frame\n"); 2382 return ENOMEM; 2383 } 2384 2385 cmd = &ring->cmd[ring->cur]; 2386 cmd->code = WPI_CMD_SET_BEACON; 2387 cmd->flags = 0; 2388 cmd->qid = ring->qid; 2389 cmd->idx = ring->cur; 2390 2391 bcn = (struct wpi_cmd_beacon *)cmd->data; 2392 memset(bcn, 0, sizeof (struct wpi_cmd_beacon)); 2393 bcn->id = WPI_ID_BROADCAST; 2394 bcn->ofdm_mask = 0xff; 2395 bcn->cck_mask = 0x0f; 2396 bcn->lifetime = htole32(WPI_LIFETIME_INFINITE); 2397 bcn->len = htole16(m0->m_pkthdr.len); 2398 bcn->rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2399 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2400 bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP); 2401 2402 /* save and trim IEEE802.11 header */ 2403 m_copydata(m0, 0, sizeof (struct ieee80211_frame), (caddr_t)&bcn->wh); 2404 m_adj(m0, sizeof (struct ieee80211_frame)); 2405 2406 /* assume beacon frame is contiguous */ 2407 error = bus_dmamap_load(ring->data_dmat, data->map, mtod(m0, void *), 2408 m0->m_pkthdr.len, wpi_dma_map_addr, &physaddr, 0); 2409 if (error != 0) { 2410 device_printf(sc->sc_dev, "could not map beacon\n"); 2411 m_freem(m0); 2412 return error; 2413 } 2414 2415 data->m = m0; 2416 2417 /* first scatter/gather segment is used by the beacon command */ 2418 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24); 2419 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2420 ring->cur * sizeof (struct wpi_tx_cmd)); 2421 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon)); 2422 desc->segs[1].addr = htole32(physaddr); 2423 desc->segs[1].len = htole32(m0->m_pkthdr.len); 2424 2425 /* kick cmd ring */ 2426 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2427 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2428 2429 return 0; 2430} 2431#endif 2432 2433static int 2434wpi_auth(struct wpi_softc *sc, struct ieee80211vap *vap) 2435{ 2436 struct ieee80211com *ic = vap->iv_ic; 2437 struct ieee80211_node *ni = vap->iv_bss; 2438 struct wpi_node_info node; 2439 int error; 2440 2441 2442 /* update adapter's configuration */ 2443 sc->config.associd = 0; 2444 sc->config.filter &= ~htole32(WPI_FILTER_BSS); 2445 IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid); 2446 sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan); 2447 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 2448 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2449 WPI_CONFIG_24GHZ); 2450 } 2451 if (IEEE80211_IS_CHAN_A(ni->ni_chan)) { 2452 sc->config.cck_mask = 0; 2453 sc->config.ofdm_mask = 0x15; 2454 } else if (IEEE80211_IS_CHAN_B(ni->ni_chan)) { 2455 sc->config.cck_mask = 0x03; 2456 sc->config.ofdm_mask = 0; 2457 } else { 2458 /* XXX assume 802.11b/g */ 2459 sc->config.cck_mask = 0x0f; 2460 sc->config.ofdm_mask = 0x15; 2461 } 2462 2463 DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan, 2464 sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask)); 2465 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2466 sizeof (struct wpi_config), 1); 2467 if (error != 0) { 2468 device_printf(sc->sc_dev, "could not configure\n"); 2469 return error; 2470 } 2471 2472 /* configuration has changed, set Tx power accordingly */ 2473 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { 2474 device_printf(sc->sc_dev, "could not set Tx power\n"); 2475 return error; 2476 } 2477 2478 /* add default node */ 2479 memset(&node, 0, sizeof node); 2480 IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid); 2481 node.id = WPI_ID_BSS; 2482 node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2483 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2484 node.action = htole32(WPI_ACTION_SET_RATE); 2485 node.antenna = WPI_ANTENNA_BOTH; 2486 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1); 2487 if (error != 0) 2488 device_printf(sc->sc_dev, "could not add BSS node\n"); 2489 2490 return (error); 2491} 2492 2493static int 2494wpi_run(struct wpi_softc *sc, struct ieee80211vap *vap) 2495{ 2496 struct ieee80211com *ic = vap->iv_ic; 2497 struct ieee80211_node *ni = vap->iv_bss; 2498 int error; 2499 2500 if (vap->iv_opmode == IEEE80211_M_MONITOR) { 2501 /* link LED blinks while monitoring */ 2502 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 2503 return 0; 2504 } 2505 2506 wpi_enable_tsf(sc, ni); 2507 2508 /* update adapter's configuration */ 2509 sc->config.associd = htole16(ni->ni_associd & ~0xc000); 2510 /* short preamble/slot time are negotiated when associating */ 2511 sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE | 2512 WPI_CONFIG_SHSLOT); 2513 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2514 sc->config.flags |= htole32(WPI_CONFIG_SHSLOT); 2515 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 2516 sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE); 2517 sc->config.filter |= htole32(WPI_FILTER_BSS); 2518 2519 /* XXX put somewhere HC_QOS_SUPPORT_ASSOC + HC_IBSS_START */ 2520 2521 DPRINTF(("config chan %d flags %x\n", sc->config.chan, 2522 sc->config.flags)); 2523 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, sizeof (struct 2524 wpi_config), 1); 2525 if (error != 0) { 2526 device_printf(sc->sc_dev, "could not update configuration\n"); 2527 return error; 2528 } 2529 2530 error = wpi_set_txpower(sc, ni->ni_chan, 1); 2531 if (error != 0) { 2532 device_printf(sc->sc_dev, "could set txpower\n"); 2533 return error; 2534 } 2535 2536 /* link LED always on while associated */ 2537 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 2538 2539 /* start automatic rate control timer */ 2540 callout_reset(&sc->calib_to, 60*hz, wpi_calib_timeout, sc); 2541 2542 return (error); 2543} 2544 2545/* 2546 * Send a scan request to the firmware. Since this command is huge, we map it 2547 * into a mbufcluster instead of using the pre-allocated set of commands. Note, 2548 * much of this code is similar to that in wpi_cmd but because we must manually 2549 * construct the probe & channels, we duplicate what's needed here. XXX In the 2550 * future, this function should be modified to use wpi_cmd to help cleanup the 2551 * code base. 2552 */ 2553static int 2554wpi_scan(struct wpi_softc *sc) 2555{ 2556 struct ifnet *ifp = sc->sc_ifp; 2557 struct ieee80211com *ic = ifp->if_l2com; 2558 struct ieee80211_scan_state *ss = ic->ic_scan; 2559 struct wpi_tx_ring *ring = &sc->cmdq; 2560 struct wpi_tx_desc *desc; 2561 struct wpi_tx_data *data; 2562 struct wpi_tx_cmd *cmd; 2563 struct wpi_scan_hdr *hdr; 2564 struct wpi_scan_chan *chan; 2565 struct ieee80211_frame *wh; 2566 struct ieee80211_rateset *rs; 2567 struct ieee80211_channel *c; 2568 enum ieee80211_phymode mode; 2569 uint8_t *frm; 2570 int nrates, pktlen, error, i, nssid; 2571 bus_addr_t physaddr; 2572 2573 desc = &ring->desc[ring->cur]; 2574 data = &ring->data[ring->cur]; 2575 2576 data->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 2577 if (data->m == NULL) { 2578 device_printf(sc->sc_dev, 2579 "could not allocate mbuf for scan command\n"); 2580 return ENOMEM; 2581 } 2582 2583 cmd = mtod(data->m, struct wpi_tx_cmd *); 2584 cmd->code = WPI_CMD_SCAN; 2585 cmd->flags = 0; 2586 cmd->qid = ring->qid; 2587 cmd->idx = ring->cur; 2588 2589 hdr = (struct wpi_scan_hdr *)cmd->data; 2590 memset(hdr, 0, sizeof(struct wpi_scan_hdr)); 2591 2592 /* 2593 * Move to the next channel if no packets are received within 5 msecs 2594 * after sending the probe request (this helps to reduce the duration 2595 * of active scans). 2596 */ 2597 hdr->quiet = htole16(5); 2598 hdr->threshold = htole16(1); 2599 2600 if (IEEE80211_IS_CHAN_A(ic->ic_curchan)) { 2601 /* send probe requests at 6Mbps */ 2602 hdr->tx.rate = wpi_ridx_to_plcp[WPI_OFDM6]; 2603 2604 /* Enable crc checking */ 2605 hdr->promotion = htole16(1); 2606 } else { 2607 hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO); 2608 /* send probe requests at 1Mbps */ 2609 hdr->tx.rate = wpi_ridx_to_plcp[WPI_CCK1]; 2610 } 2611 hdr->tx.id = WPI_ID_BROADCAST; 2612 hdr->tx.lifetime = htole32(WPI_LIFETIME_INFINITE); 2613 hdr->tx.flags = htole32(WPI_TX_AUTO_SEQ); 2614 2615 memset(hdr->scan_essids, 0, sizeof(hdr->scan_essids)); 2616 nssid = MIN(ss->ss_nssid, WPI_SCAN_MAX_ESSIDS); 2617 for (i = 0; i < nssid; i++) { 2618 hdr->scan_essids[i].id = IEEE80211_ELEMID_SSID; 2619 hdr->scan_essids[i].esslen = MIN(ss->ss_ssid[i].len, 32); 2620 memcpy(hdr->scan_essids[i].essid, ss->ss_ssid[i].ssid, 2621 hdr->scan_essids[i].esslen); 2622#ifdef WPI_DEBUG 2623 if (wpi_debug & WPI_DEBUG_SCANNING) { 2624 printf("Scanning Essid: "); 2625 ieee80211_print_essid(hdr->scan_essids[i].essid, 2626 hdr->scan_essids[i].esslen); 2627 printf("\n"); 2628 } 2629#endif 2630 } 2631 2632 /* 2633 * Build a probe request frame. Most of the following code is a 2634 * copy & paste of what is done in net80211. 2635 */ 2636 wh = (struct ieee80211_frame *)&hdr->scan_essids[4]; 2637 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 2638 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 2639 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2640 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 2641 IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); 2642 IEEE80211_ADDR_COPY(wh->i_addr3, ifp->if_broadcastaddr); 2643 *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */ 2644 *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */ 2645 2646 frm = (uint8_t *)(wh + 1); 2647 2648 /* add essid IE, the hardware will fill this in for us */ 2649 *frm++ = IEEE80211_ELEMID_SSID; 2650 *frm++ = 0; 2651 2652 mode = ieee80211_chan2mode(ic->ic_curchan); 2653 rs = &ic->ic_sup_rates[mode]; 2654 2655 /* add supported rates IE */ 2656 *frm++ = IEEE80211_ELEMID_RATES; 2657 nrates = rs->rs_nrates; 2658 if (nrates > IEEE80211_RATE_SIZE) 2659 nrates = IEEE80211_RATE_SIZE; 2660 *frm++ = nrates; 2661 memcpy(frm, rs->rs_rates, nrates); 2662 frm += nrates; 2663 2664 /* add supported xrates IE */ 2665 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 2666 nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 2667 *frm++ = IEEE80211_ELEMID_XRATES; 2668 *frm++ = nrates; 2669 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 2670 frm += nrates; 2671 } 2672 2673 /* setup length of probe request */ 2674 hdr->tx.len = htole16(frm - (uint8_t *)wh); 2675 2676 /* 2677 * Construct information about the channel that we 2678 * want to scan. The firmware expects this to be directly 2679 * after the scan probe request 2680 */ 2681 c = ic->ic_curchan; 2682 chan = (struct wpi_scan_chan *)frm; 2683 chan->chan = ieee80211_chan2ieee(ic, c); 2684 chan->flags = 0; 2685 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2686 chan->flags |= WPI_CHAN_ACTIVE; 2687 if (nssid != 0) 2688 chan->flags |= WPI_CHAN_DIRECT; 2689 } 2690 chan->gain_dsp = 0x6e; /* Default level */ 2691 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2692 chan->active = htole16(10); 2693 chan->passive = htole16(ss->ss_maxdwell); 2694 chan->gain_radio = 0x3b; 2695 } else { 2696 chan->active = htole16(20); 2697 chan->passive = htole16(ss->ss_maxdwell); 2698 chan->gain_radio = 0x28; 2699 } 2700 2701 DPRINTFN(WPI_DEBUG_SCANNING, 2702 ("Scanning %u Passive: %d\n", 2703 chan->chan, 2704 c->ic_flags & IEEE80211_CHAN_PASSIVE)); 2705 2706 hdr->nchan++; 2707 chan++; 2708 2709 frm += sizeof (struct wpi_scan_chan); 2710#if 0 2711 // XXX All Channels.... 2712 for (c = &ic->ic_channels[1]; 2713 c <= &ic->ic_channels[IEEE80211_CHAN_MAX]; c++) { 2714 if ((c->ic_flags & ic->ic_curchan->ic_flags) != ic->ic_curchan->ic_flags) 2715 continue; 2716 2717 chan->chan = ieee80211_chan2ieee(ic, c); 2718 chan->flags = 0; 2719 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2720 chan->flags |= WPI_CHAN_ACTIVE; 2721 if (ic->ic_des_ssid[0].len != 0) 2722 chan->flags |= WPI_CHAN_DIRECT; 2723 } 2724 chan->gain_dsp = 0x6e; /* Default level */ 2725 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2726 chan->active = htole16(10); 2727 chan->passive = htole16(110); 2728 chan->gain_radio = 0x3b; 2729 } else { 2730 chan->active = htole16(20); 2731 chan->passive = htole16(120); 2732 chan->gain_radio = 0x28; 2733 } 2734 2735 DPRINTFN(WPI_DEBUG_SCANNING, 2736 ("Scanning %u Passive: %d\n", 2737 chan->chan, 2738 c->ic_flags & IEEE80211_CHAN_PASSIVE)); 2739 2740 hdr->nchan++; 2741 chan++; 2742 2743 frm += sizeof (struct wpi_scan_chan); 2744 } 2745#endif 2746 2747 hdr->len = htole16(frm - (uint8_t *)hdr); 2748 pktlen = frm - (uint8_t *)cmd; 2749 2750 error = bus_dmamap_load(ring->data_dmat, data->map, cmd, pktlen, 2751 wpi_dma_map_addr, &physaddr, BUS_DMA_NOWAIT); 2752 if (error != 0) { 2753 device_printf(sc->sc_dev, "could not map scan command\n"); 2754 m_freem(data->m); 2755 data->m = NULL; 2756 return error; 2757 } 2758 2759 desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24); 2760 desc->segs[0].addr = htole32(physaddr); 2761 desc->segs[0].len = htole32(pktlen); 2762 2763 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 2764 BUS_DMASYNC_PREWRITE); 2765 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 2766 2767 /* kick cmd ring */ 2768 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2769 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2770 2771 sc->sc_scan_timer = 5; 2772 return 0; /* will be notified async. of failure/success */ 2773} 2774 2775/** 2776 * Configure the card to listen to a particular channel, this transisions the 2777 * card in to being able to receive frames from remote devices. 2778 */ 2779static int 2780wpi_config(struct wpi_softc *sc) 2781{ 2782 struct ifnet *ifp = sc->sc_ifp; 2783 struct ieee80211com *ic = ifp->if_l2com; 2784 struct wpi_power power; 2785 struct wpi_bluetooth bluetooth; 2786 struct wpi_node_info node; 2787 int error; 2788 2789 /* set power mode */ 2790 memset(&power, 0, sizeof power); 2791 power.flags = htole32(WPI_POWER_CAM|0x8); 2792 error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0); 2793 if (error != 0) { 2794 device_printf(sc->sc_dev, "could not set power mode\n"); 2795 return error; 2796 } 2797 2798 /* configure bluetooth coexistence */ 2799 memset(&bluetooth, 0, sizeof bluetooth); 2800 bluetooth.flags = 3; 2801 bluetooth.lead = 0xaa; 2802 bluetooth.kill = 1; 2803 error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth, 2804 0); 2805 if (error != 0) { 2806 device_printf(sc->sc_dev, 2807 "could not configure bluetooth coexistence\n"); 2808 return error; 2809 } 2810 2811 /* configure adapter */ 2812 memset(&sc->config, 0, sizeof (struct wpi_config)); 2813 IEEE80211_ADDR_COPY(sc->config.myaddr, ic->ic_myaddr); 2814 /*set default channel*/ 2815 sc->config.chan = htole16(ieee80211_chan2ieee(ic, ic->ic_curchan)); 2816 sc->config.flags = htole32(WPI_CONFIG_TSF); 2817 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) { 2818 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2819 WPI_CONFIG_24GHZ); 2820 } 2821 sc->config.filter = 0; 2822 switch (ic->ic_opmode) { 2823 case IEEE80211_M_STA: 2824 case IEEE80211_M_WDS: /* No know setup, use STA for now */ 2825 sc->config.mode = WPI_MODE_STA; 2826 sc->config.filter |= htole32(WPI_FILTER_MULTICAST); 2827 break; 2828 case IEEE80211_M_IBSS: 2829 case IEEE80211_M_AHDEMO: 2830 sc->config.mode = WPI_MODE_IBSS; 2831 sc->config.filter |= htole32(WPI_FILTER_BEACON | 2832 WPI_FILTER_MULTICAST); 2833 break; 2834 case IEEE80211_M_HOSTAP: 2835 sc->config.mode = WPI_MODE_HOSTAP; 2836 break; 2837 case IEEE80211_M_MONITOR: 2838 sc->config.mode = WPI_MODE_MONITOR; 2839 sc->config.filter |= htole32(WPI_FILTER_MULTICAST | 2840 WPI_FILTER_CTL | WPI_FILTER_PROMISC); 2841 break; 2842 } 2843 sc->config.cck_mask = 0x0f; /* not yet negotiated */ 2844 sc->config.ofdm_mask = 0xff; /* not yet negotiated */ 2845 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2846 sizeof (struct wpi_config), 0); 2847 if (error != 0) { 2848 device_printf(sc->sc_dev, "configure command failed\n"); 2849 return error; 2850 } 2851 2852 /* configuration has changed, set Tx power accordingly */ 2853 if ((error = wpi_set_txpower(sc, ic->ic_curchan, 0)) != 0) { 2854 device_printf(sc->sc_dev, "could not set Tx power\n"); 2855 return error; 2856 } 2857 2858 /* add broadcast node */ 2859 memset(&node, 0, sizeof node); 2860 IEEE80211_ADDR_COPY(node.bssid, ifp->if_broadcastaddr); 2861 node.id = WPI_ID_BROADCAST; 2862 node.rate = wpi_plcp_signal(2); 2863 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0); 2864 if (error != 0) { 2865 device_printf(sc->sc_dev, "could not add broadcast node\n"); 2866 return error; 2867 } 2868 2869 /* Setup rate scalling */ 2870 error = wpi_mrr_setup(sc); 2871 if (error != 0) { 2872 device_printf(sc->sc_dev, "could not setup MRR\n"); 2873 return error; 2874 } 2875 2876 return 0; 2877} 2878 2879static void 2880wpi_stop_master(struct wpi_softc *sc) 2881{ 2882 uint32_t tmp; 2883 int ntries; 2884 2885 DPRINTFN(WPI_DEBUG_HW,("Disabling Firmware execution\n")); 2886 2887 tmp = WPI_READ(sc, WPI_RESET); 2888 WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER | WPI_NEVO_RESET); 2889 2890 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2891 if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP) 2892 return; /* already asleep */ 2893 2894 for (ntries = 0; ntries < 100; ntries++) { 2895 if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED) 2896 break; 2897 DELAY(10); 2898 } 2899 if (ntries == 100) { 2900 device_printf(sc->sc_dev, "timeout waiting for master\n"); 2901 } 2902} 2903 2904static int 2905wpi_power_up(struct wpi_softc *sc) 2906{ 2907 uint32_t tmp; 2908 int ntries; 2909 2910 wpi_mem_lock(sc); 2911 tmp = wpi_mem_read(sc, WPI_MEM_POWER); 2912 wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000); 2913 wpi_mem_unlock(sc); 2914 2915 for (ntries = 0; ntries < 5000; ntries++) { 2916 if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED) 2917 break; 2918 DELAY(10); 2919 } 2920 if (ntries == 5000) { 2921 device_printf(sc->sc_dev, 2922 "timeout waiting for NIC to power up\n"); 2923 return ETIMEDOUT; 2924 } 2925 return 0; 2926} 2927 2928static int 2929wpi_reset(struct wpi_softc *sc) 2930{ 2931 uint32_t tmp; 2932 int ntries; 2933 2934 DPRINTFN(WPI_DEBUG_HW, 2935 ("Resetting the card - clearing any uploaded firmware\n")); 2936 2937 /* clear any pending interrupts */ 2938 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 2939 2940 tmp = WPI_READ(sc, WPI_PLL_CTL); 2941 WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT); 2942 2943 tmp = WPI_READ(sc, WPI_CHICKEN); 2944 WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS); 2945 2946 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2947 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT); 2948 2949 /* wait for clock stabilization */ 2950 for (ntries = 0; ntries < 25000; ntries++) { 2951 if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK) 2952 break; 2953 DELAY(10); 2954 } 2955 if (ntries == 25000) { 2956 device_printf(sc->sc_dev, 2957 "timeout waiting for clock stabilization\n"); 2958 return ETIMEDOUT; 2959 } 2960 2961 /* initialize EEPROM */ 2962 tmp = WPI_READ(sc, WPI_EEPROM_STATUS); 2963 2964 if ((tmp & WPI_EEPROM_VERSION) == 0) { 2965 device_printf(sc->sc_dev, "EEPROM not found\n"); 2966 return EIO; 2967 } 2968 WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED); 2969 2970 return 0; 2971} 2972 2973static void 2974wpi_hw_config(struct wpi_softc *sc) 2975{ 2976 uint32_t rev, hw; 2977 2978 /* voodoo from the Linux "driver".. */ 2979 hw = WPI_READ(sc, WPI_HWCONFIG); 2980 2981 rev = pci_read_config(sc->sc_dev, PCIR_REVID, 1); 2982 if ((rev & 0xc0) == 0x40) 2983 hw |= WPI_HW_ALM_MB; 2984 else if (!(rev & 0x80)) 2985 hw |= WPI_HW_ALM_MM; 2986 2987 if (sc->cap == 0x80) 2988 hw |= WPI_HW_SKU_MRC; 2989 2990 hw &= ~WPI_HW_REV_D; 2991 if ((le16toh(sc->rev) & 0xf0) == 0xd0) 2992 hw |= WPI_HW_REV_D; 2993 2994 if (sc->type > 1) 2995 hw |= WPI_HW_TYPE_B; 2996 2997 WPI_WRITE(sc, WPI_HWCONFIG, hw); 2998} 2999 3000static void 3001wpi_rfkill_resume(struct wpi_softc *sc) 3002{ 3003 struct ifnet *ifp = sc->sc_ifp; 3004 struct ieee80211com *ic = ifp->if_l2com; 3005 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3006 int ntries; 3007 3008 /* enable firmware again */ 3009 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3010 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3011 3012 /* wait for thermal sensors to calibrate */ 3013 for (ntries = 0; ntries < 1000; ntries++) { 3014 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3015 break; 3016 DELAY(10); 3017 } 3018 3019 if (ntries == 1000) { 3020 device_printf(sc->sc_dev, 3021 "timeout waiting for thermal calibration\n"); 3022 WPI_UNLOCK(sc); 3023 return; 3024 } 3025 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp)); 3026 3027 if (wpi_config(sc) != 0) { 3028 device_printf(sc->sc_dev, "device config failed\n"); 3029 WPI_UNLOCK(sc); 3030 return; 3031 } 3032 3033 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 3034 ifp->if_drv_flags |= IFF_DRV_RUNNING; 3035 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3036 3037 if (vap != NULL) { 3038 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 3039 if (vap->iv_opmode != IEEE80211_M_MONITOR) { 3040 taskqueue_enqueue(taskqueue_swi, 3041 &sc->sc_bmiss_task); 3042 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 3043 } else 3044 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 3045 } else { 3046 ieee80211_scan_next(vap); 3047 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 3048 } 3049 } 3050 3051 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc); 3052} 3053 3054static void 3055wpi_init_locked(struct wpi_softc *sc, int force) 3056{ 3057 struct ifnet *ifp = sc->sc_ifp; 3058 uint32_t tmp; 3059 int ntries, qid; 3060 3061 wpi_stop_locked(sc); 3062 (void)wpi_reset(sc); 3063 3064 wpi_mem_lock(sc); 3065 wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00); 3066 DELAY(20); 3067 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 3068 wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800); 3069 wpi_mem_unlock(sc); 3070 3071 (void)wpi_power_up(sc); 3072 wpi_hw_config(sc); 3073 3074 /* init Rx ring */ 3075 wpi_mem_lock(sc); 3076 WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr); 3077 WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr + 3078 offsetof(struct wpi_shared, next)); 3079 WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7); 3080 WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010); 3081 wpi_mem_unlock(sc); 3082 3083 /* init Tx rings */ 3084 wpi_mem_lock(sc); 3085 wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */ 3086 wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */ 3087 wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */ 3088 wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000); 3089 wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002); 3090 wpi_mem_write(sc, WPI_MEM_MAGIC4, 4); 3091 wpi_mem_write(sc, WPI_MEM_MAGIC5, 5); 3092 3093 WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr); 3094 WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5); 3095 3096 for (qid = 0; qid < 6; qid++) { 3097 WPI_WRITE(sc, WPI_TX_CTL(qid), 0); 3098 WPI_WRITE(sc, WPI_TX_BASE(qid), 0); 3099 WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008); 3100 } 3101 wpi_mem_unlock(sc); 3102 3103 /* clear "radio off" and "disable command" bits (reversed logic) */ 3104 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3105 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3106 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3107 3108 /* clear any pending interrupts */ 3109 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 3110 3111 /* enable interrupts */ 3112 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 3113 3114 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3115 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3116 3117 if ((wpi_load_firmware(sc)) != 0) { 3118 device_printf(sc->sc_dev, 3119 "A problem occurred loading the firmware to the driver\n"); 3120 return; 3121 } 3122 3123 /* At this point the firmware is up and running. If the hardware 3124 * RF switch is turned off thermal calibration will fail, though 3125 * the card is still happy to continue to accept commands, catch 3126 * this case and schedule a task to watch for it to be turned on. 3127 */ 3128 wpi_mem_lock(sc); 3129 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF); 3130 wpi_mem_unlock(sc); 3131 3132 if (!(tmp & 0x1)) { 3133 sc->flags |= WPI_FLAG_HW_RADIO_OFF; 3134 device_printf(sc->sc_dev,"Radio Transmitter is switched off\n"); 3135 goto out; 3136 } 3137 3138 /* wait for thermal sensors to calibrate */ 3139 for (ntries = 0; ntries < 1000; ntries++) { 3140 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3141 break; 3142 DELAY(10); 3143 } 3144 3145 if (ntries == 1000) { 3146 device_printf(sc->sc_dev, 3147 "timeout waiting for thermal sensors calibration\n"); 3148 return; 3149 } 3150 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp)); 3151 3152 if (wpi_config(sc) != 0) { 3153 device_printf(sc->sc_dev, "device config failed\n"); 3154 return; 3155 } 3156 3157 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 3158 ifp->if_drv_flags |= IFF_DRV_RUNNING; 3159out: 3160 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc); 3161} 3162 3163static void 3164wpi_init(void *arg) 3165{ 3166 struct wpi_softc *sc = arg; 3167 struct ifnet *ifp = sc->sc_ifp; 3168 struct ieee80211com *ic = ifp->if_l2com; 3169 3170 WPI_LOCK(sc); 3171 wpi_init_locked(sc, 0); 3172 WPI_UNLOCK(sc); 3173 3174 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 3175 ieee80211_start_all(ic); /* start all vaps */ 3176} 3177 3178static void 3179wpi_stop_locked(struct wpi_softc *sc) 3180{ 3181 struct ifnet *ifp = sc->sc_ifp; 3182 uint32_t tmp; 3183 int ac; 3184 3185 sc->sc_tx_timer = 0; 3186 sc->sc_scan_timer = 0; 3187 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 3188 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3189 callout_stop(&sc->watchdog_to); 3190 callout_stop(&sc->calib_to); 3191 3192 3193 /* disable interrupts */ 3194 WPI_WRITE(sc, WPI_MASK, 0); 3195 WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK); 3196 WPI_WRITE(sc, WPI_INTR_STATUS, 0xff); 3197 WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000); 3198 3199 /* Clear any commands left in the command buffer */ 3200 memset(sc->sc_cmd, 0, sizeof(sc->sc_cmd)); 3201 memset(sc->sc_cmd_arg, 0, sizeof(sc->sc_cmd_arg)); 3202 sc->sc_cmd_cur = 0; 3203 sc->sc_cmd_next = 0; 3204 3205 wpi_mem_lock(sc); 3206 wpi_mem_write(sc, WPI_MEM_MODE, 0); 3207 wpi_mem_unlock(sc); 3208 3209 /* reset all Tx rings */ 3210 for (ac = 0; ac < 4; ac++) 3211 wpi_reset_tx_ring(sc, &sc->txq[ac]); 3212 wpi_reset_tx_ring(sc, &sc->cmdq); 3213 3214 /* reset Rx ring */ 3215 wpi_reset_rx_ring(sc, &sc->rxq); 3216 3217 wpi_mem_lock(sc); 3218 wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200); 3219 wpi_mem_unlock(sc); 3220 3221 DELAY(5); 3222 3223 wpi_stop_master(sc); 3224 3225 tmp = WPI_READ(sc, WPI_RESET); 3226 WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET); 3227 sc->flags &= ~WPI_FLAG_BUSY; 3228} 3229 3230static void 3231wpi_stop(struct wpi_softc *sc) 3232{ 3233 WPI_LOCK(sc); 3234 wpi_stop_locked(sc); 3235 WPI_UNLOCK(sc); 3236} 3237 3238static void 3239wpi_newassoc(struct ieee80211_node *ni, int isnew) 3240{ 3241 struct ieee80211vap *vap = ni->ni_vap; 3242 struct wpi_vap *wvp = WPI_VAP(vap); 3243 3244 ieee80211_amrr_node_init(&wvp->amrr, &WPI_NODE(ni)->amn, ni); 3245} 3246 3247static void 3248wpi_calib_timeout(void *arg) 3249{ 3250 struct wpi_softc *sc = arg; 3251 struct ifnet *ifp = sc->sc_ifp; 3252 struct ieee80211com *ic = ifp->if_l2com; 3253 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3254 int temp; 3255 3256 if (vap->iv_state != IEEE80211_S_RUN) 3257 return; 3258 3259 /* update sensor data */ 3260 temp = (int)WPI_READ(sc, WPI_TEMPERATURE); 3261 DPRINTFN(WPI_DEBUG_TEMP,("Temp in calibration is: %d\n", temp)); 3262 3263 wpi_power_calibration(sc, temp); 3264 3265 callout_reset(&sc->calib_to, 60*hz, wpi_calib_timeout, sc); 3266} 3267 3268/* 3269 * This function is called periodically (every 60 seconds) to adjust output 3270 * power to temperature changes. 3271 */ 3272static void 3273wpi_power_calibration(struct wpi_softc *sc, int temp) 3274{ 3275 struct ifnet *ifp = sc->sc_ifp; 3276 struct ieee80211com *ic = ifp->if_l2com; 3277 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3278 3279 /* sanity-check read value */ 3280 if (temp < -260 || temp > 25) { 3281 /* this can't be correct, ignore */ 3282 DPRINTFN(WPI_DEBUG_TEMP, 3283 ("out-of-range temperature reported: %d\n", temp)); 3284 return; 3285 } 3286 3287 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d->%d\n", sc->temp, temp)); 3288 3289 /* adjust Tx power if need be */ 3290 if (abs(temp - sc->temp) <= 6) 3291 return; 3292 3293 sc->temp = temp; 3294 3295 if (wpi_set_txpower(sc, vap->iv_bss->ni_chan, 1) != 0) { 3296 /* just warn, too bad for the automatic calibration... */ 3297 device_printf(sc->sc_dev,"could not adjust Tx power\n"); 3298 } 3299} 3300 3301/** 3302 * Read the eeprom to find out what channels are valid for the given 3303 * band and update net80211 with what we find. 3304 */ 3305static void 3306wpi_read_eeprom_channels(struct wpi_softc *sc, int n) 3307{ 3308 struct ifnet *ifp = sc->sc_ifp; 3309 struct ieee80211com *ic = ifp->if_l2com; 3310 const struct wpi_chan_band *band = &wpi_bands[n]; 3311 struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND]; 3312 struct ieee80211_channel *c; 3313 int chan, i, passive; 3314 3315 wpi_read_prom_data(sc, band->addr, channels, 3316 band->nchan * sizeof (struct wpi_eeprom_chan)); 3317 3318 for (i = 0; i < band->nchan; i++) { 3319 if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID)) { 3320 DPRINTFN(WPI_DEBUG_HW, 3321 ("Channel Not Valid: %d, band %d\n", 3322 band->chan[i],n)); 3323 continue; 3324 } 3325 3326 passive = 0; 3327 chan = band->chan[i]; 3328 c = &ic->ic_channels[ic->ic_nchans++]; 3329 3330 /* is active scan allowed on this channel? */ 3331 if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) { 3332 passive = IEEE80211_CHAN_PASSIVE; 3333 } 3334 3335 if (n == 0) { /* 2GHz band */ 3336 c->ic_ieee = chan; 3337 c->ic_freq = ieee80211_ieee2mhz(chan, 3338 IEEE80211_CHAN_2GHZ); 3339 c->ic_flags = IEEE80211_CHAN_B | passive; 3340 3341 c = &ic->ic_channels[ic->ic_nchans++]; 3342 c->ic_ieee = chan; 3343 c->ic_freq = ieee80211_ieee2mhz(chan, 3344 IEEE80211_CHAN_2GHZ); 3345 c->ic_flags = IEEE80211_CHAN_G | passive; 3346 3347 } else { /* 5GHz band */ 3348 /* 3349 * Some 3945ABG adapters support channels 7, 8, 11 3350 * and 12 in the 2GHz *and* 5GHz bands. 3351 * Because of limitations in our net80211(9) stack, 3352 * we can't support these channels in 5GHz band. 3353 * XXX not true; just need to map to proper frequency 3354 */ 3355 if (chan <= 14) 3356 continue; 3357 3358 c->ic_ieee = chan; 3359 c->ic_freq = ieee80211_ieee2mhz(chan, 3360 IEEE80211_CHAN_5GHZ); 3361 c->ic_flags = IEEE80211_CHAN_A | passive; 3362 } 3363 3364 /* save maximum allowed power for this channel */ 3365 sc->maxpwr[chan] = channels[i].maxpwr; 3366 3367#if 0 3368 // XXX We can probably use this an get rid of maxpwr - ben 20070617 3369 ic->ic_channels[chan].ic_maxpower = channels[i].maxpwr; 3370 //ic->ic_channels[chan].ic_minpower... 3371 //ic->ic_channels[chan].ic_maxregtxpower... 3372#endif 3373 3374 DPRINTF(("adding chan %d (%dMHz) flags=0x%x maxpwr=%d" 3375 " passive=%d, offset %d\n", chan, c->ic_freq, 3376 channels[i].flags, sc->maxpwr[chan], 3377 (c->ic_flags & IEEE80211_CHAN_PASSIVE) != 0, 3378 ic->ic_nchans)); 3379 } 3380} 3381 3382static void 3383wpi_read_eeprom_group(struct wpi_softc *sc, int n) 3384{ 3385 struct wpi_power_group *group = &sc->groups[n]; 3386 struct wpi_eeprom_group rgroup; 3387 int i; 3388 3389 wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup, 3390 sizeof rgroup); 3391 3392 /* save power group information */ 3393 group->chan = rgroup.chan; 3394 group->maxpwr = rgroup.maxpwr; 3395 /* temperature at which the samples were taken */ 3396 group->temp = (int16_t)le16toh(rgroup.temp); 3397 3398 DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n, 3399 group->chan, group->maxpwr, group->temp)); 3400 3401 for (i = 0; i < WPI_SAMPLES_COUNT; i++) { 3402 group->samples[i].index = rgroup.samples[i].index; 3403 group->samples[i].power = rgroup.samples[i].power; 3404 3405 DPRINTF(("\tsample %d: index=%d power=%d\n", i, 3406 group->samples[i].index, group->samples[i].power)); 3407 } 3408} 3409 3410/* 3411 * Update Tx power to match what is defined for channel `c'. 3412 */ 3413static int 3414wpi_set_txpower(struct wpi_softc *sc, struct ieee80211_channel *c, int async) 3415{ 3416 struct ifnet *ifp = sc->sc_ifp; 3417 struct ieee80211com *ic = ifp->if_l2com; 3418 struct wpi_power_group *group; 3419 struct wpi_cmd_txpower txpower; 3420 u_int chan; 3421 int i; 3422 3423 /* get channel number */ 3424 chan = ieee80211_chan2ieee(ic, c); 3425 3426 /* find the power group to which this channel belongs */ 3427 if (IEEE80211_IS_CHAN_5GHZ(c)) { 3428 for (group = &sc->groups[1]; group < &sc->groups[4]; group++) 3429 if (chan <= group->chan) 3430 break; 3431 } else 3432 group = &sc->groups[0]; 3433 3434 memset(&txpower, 0, sizeof txpower); 3435 txpower.band = IEEE80211_IS_CHAN_5GHZ(c) ? 0 : 1; 3436 txpower.channel = htole16(chan); 3437 3438 /* set Tx power for all OFDM and CCK rates */ 3439 for (i = 0; i <= 11 ; i++) { 3440 /* retrieve Tx power for this channel/rate combination */ 3441 int idx = wpi_get_power_index(sc, group, c, 3442 wpi_ridx_to_rate[i]); 3443 3444 txpower.rates[i].rate = wpi_ridx_to_plcp[i]; 3445 3446 if (IEEE80211_IS_CHAN_5GHZ(c)) { 3447 txpower.rates[i].gain_radio = wpi_rf_gain_5ghz[idx]; 3448 txpower.rates[i].gain_dsp = wpi_dsp_gain_5ghz[idx]; 3449 } else { 3450 txpower.rates[i].gain_radio = wpi_rf_gain_2ghz[idx]; 3451 txpower.rates[i].gain_dsp = wpi_dsp_gain_2ghz[idx]; 3452 } 3453 DPRINTFN(WPI_DEBUG_TEMP,("chan %d/rate %d: power index %d\n", 3454 chan, wpi_ridx_to_rate[i], idx)); 3455 } 3456 3457 return wpi_cmd(sc, WPI_CMD_TXPOWER, &txpower, sizeof txpower, async); 3458} 3459 3460/* 3461 * Determine Tx power index for a given channel/rate combination. 3462 * This takes into account the regulatory information from EEPROM and the 3463 * current temperature. 3464 */ 3465static int 3466wpi_get_power_index(struct wpi_softc *sc, struct wpi_power_group *group, 3467 struct ieee80211_channel *c, int rate) 3468{ 3469/* fixed-point arithmetic division using a n-bit fractional part */ 3470#define fdivround(a, b, n) \ 3471 ((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n)) 3472 3473/* linear interpolation */ 3474#define interpolate(x, x1, y1, x2, y2, n) \ 3475 ((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n)) 3476 3477 struct ifnet *ifp = sc->sc_ifp; 3478 struct ieee80211com *ic = ifp->if_l2com; 3479 struct wpi_power_sample *sample; 3480 int pwr, idx; 3481 u_int chan; 3482 3483 /* get channel number */ 3484 chan = ieee80211_chan2ieee(ic, c); 3485 3486 /* default power is group's maximum power - 3dB */ 3487 pwr = group->maxpwr / 2; 3488 3489 /* decrease power for highest OFDM rates to reduce distortion */ 3490 switch (rate) { 3491 case 72: /* 36Mb/s */ 3492 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 0 : 5; 3493 break; 3494 case 96: /* 48Mb/s */ 3495 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 7 : 10; 3496 break; 3497 case 108: /* 54Mb/s */ 3498 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 9 : 12; 3499 break; 3500 } 3501 3502 /* never exceed channel's maximum allowed Tx power */ 3503 pwr = min(pwr, sc->maxpwr[chan]); 3504 3505 /* retrieve power index into gain tables from samples */ 3506 for (sample = group->samples; sample < &group->samples[3]; sample++) 3507 if (pwr > sample[1].power) 3508 break; 3509 /* fixed-point linear interpolation using a 19-bit fractional part */ 3510 idx = interpolate(pwr, sample[0].power, sample[0].index, 3511 sample[1].power, sample[1].index, 19); 3512 3513 /* 3514 * Adjust power index based on current temperature 3515 * - if colder than factory-calibrated: decreate output power 3516 * - if warmer than factory-calibrated: increase output power 3517 */ 3518 idx -= (sc->temp - group->temp) * 11 / 100; 3519 3520 /* decrease power for CCK rates (-5dB) */ 3521 if (!WPI_RATE_IS_OFDM(rate)) 3522 idx += 10; 3523 3524 /* keep power index in a valid range */ 3525 if (idx < 0) 3526 return 0; 3527 if (idx > WPI_MAX_PWR_INDEX) 3528 return WPI_MAX_PWR_INDEX; 3529 return idx; 3530 3531#undef interpolate 3532#undef fdivround 3533} 3534 3535/** 3536 * Called by net80211 framework to indicate that a scan 3537 * is starting. This function doesn't actually do the scan, 3538 * wpi_scan_curchan starts things off. This function is more 3539 * of an early warning from the framework we should get ready 3540 * for the scan. 3541 */ 3542static void 3543wpi_scan_start(struct ieee80211com *ic) 3544{ 3545 struct ifnet *ifp = ic->ic_ifp; 3546 struct wpi_softc *sc = ifp->if_softc; 3547 3548 wpi_queue_cmd(sc, WPI_SCAN_START, 0, WPI_QUEUE_NORMAL); 3549} 3550 3551/** 3552 * Called by the net80211 framework, indicates that the 3553 * scan has ended. If there is a scan in progress on the card 3554 * then it should be aborted. 3555 */ 3556static void 3557wpi_scan_end(struct ieee80211com *ic) 3558{ 3559 struct ifnet *ifp = ic->ic_ifp; 3560 struct wpi_softc *sc = ifp->if_softc; 3561 3562 wpi_queue_cmd(sc, WPI_SCAN_STOP, 0, WPI_QUEUE_NORMAL); 3563} 3564 3565/** 3566 * Called by the net80211 framework to indicate to the driver 3567 * that the channel should be changed 3568 */ 3569static void 3570wpi_set_channel(struct ieee80211com *ic) 3571{ 3572 struct ifnet *ifp = ic->ic_ifp; 3573 struct wpi_softc *sc = ifp->if_softc; 3574 3575 /* 3576 * Only need to set the channel in Monitor mode. AP scanning and auth 3577 * are already taken care of by their respective firmware commands. 3578 */ 3579 if (ic->ic_opmode == IEEE80211_M_MONITOR) 3580 wpi_queue_cmd(sc, WPI_SET_CHAN, 0, WPI_QUEUE_NORMAL); 3581} 3582 3583/** 3584 * Called by net80211 to indicate that we need to scan the current 3585 * channel. The channel is previously be set via the wpi_set_channel 3586 * callback. 3587 */ 3588static void 3589wpi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell) 3590{ 3591 struct ieee80211vap *vap = ss->ss_vap; 3592 struct ifnet *ifp = vap->iv_ic->ic_ifp; 3593 struct wpi_softc *sc = ifp->if_softc; 3594 3595 wpi_queue_cmd(sc, WPI_SCAN_CURCHAN, 0, WPI_QUEUE_NORMAL); 3596} 3597 3598/** 3599 * Called by the net80211 framework to indicate 3600 * the minimum dwell time has been met, terminate the scan. 3601 * We don't actually terminate the scan as the firmware will notify 3602 * us when it's finished and we have no way to interrupt it. 3603 */ 3604static void 3605wpi_scan_mindwell(struct ieee80211_scan_state *ss) 3606{ 3607 /* NB: don't try to abort scan; wait for firmware to finish */ 3608} 3609 3610/** 3611 * The ops function is called to perform some actual work. 3612 * because we can't sleep from any of the ic callbacks, we queue an 3613 * op task with wpi_queue_cmd and have the taskqueue process that task. 3614 * The task that gets cued is a op task, which ends up calling this function. 3615 */ 3616static void 3617wpi_ops(void *arg0, int pending) 3618{ 3619 struct wpi_softc *sc = arg0; 3620 struct ifnet *ifp = sc->sc_ifp; 3621 struct ieee80211com *ic = ifp->if_l2com; 3622 int cmd, arg, error; 3623 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3624 3625again: 3626 WPI_CMD_LOCK(sc); 3627 cmd = sc->sc_cmd[sc->sc_cmd_cur]; 3628 arg = sc->sc_cmd_arg[sc->sc_cmd_cur]; 3629 3630 if (cmd == 0) { 3631 /* No more commands to process */ 3632 WPI_CMD_UNLOCK(sc); 3633 return; 3634 } 3635 sc->sc_cmd[sc->sc_cmd_cur] = 0; /* free the slot */ 3636 sc->sc_cmd_arg[sc->sc_cmd_cur] = 0; /* free the slot */ 3637 sc->sc_cmd_cur = (sc->sc_cmd_cur + 1) % WPI_CMD_MAXOPS; 3638 WPI_CMD_UNLOCK(sc); 3639 WPI_LOCK(sc); 3640 3641 DPRINTFN(WPI_DEBUG_OPS,("wpi_ops: command: %d\n", cmd)); 3642 3643 switch (cmd) { 3644 case WPI_RESTART: 3645 wpi_init_locked(sc, 0); 3646 WPI_UNLOCK(sc); 3647 return; 3648 3649 case WPI_RF_RESTART: 3650 wpi_rfkill_resume(sc); 3651 WPI_UNLOCK(sc); 3652 return; 3653 } 3654 3655 if (!(sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)) { 3656 WPI_UNLOCK(sc); 3657 return; 3658 } 3659 3660 switch (cmd) { 3661 case WPI_SCAN_START: 3662 /* make the link LED blink while we're scanning */ 3663 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 3664 sc->flags |= WPI_FLAG_SCANNING; 3665 break; 3666 3667 case WPI_SCAN_STOP: 3668 sc->flags &= ~WPI_FLAG_SCANNING; 3669 break; 3670 3671 case WPI_SCAN_CURCHAN: 3672 if (wpi_scan(sc)) 3673 ieee80211_cancel_scan(vap); 3674 break; 3675 3676 case WPI_SET_CHAN: 3677 error = wpi_config(sc); 3678 if (error != 0) 3679 device_printf(sc->sc_dev, 3680 "error %d settting channel\n", error); 3681 break; 3682 3683 case WPI_AUTH: 3684 /* The node must be registered in the firmware before auth */ 3685 error = wpi_auth(sc, vap); 3686 WPI_UNLOCK(sc); 3687 if (error != 0) { 3688 device_printf(sc->sc_dev, 3689 "%s: could not move to auth state, error %d\n", 3690 __func__, error); 3691 return; 3692 } 3693 IEEE80211_LOCK(ic); 3694 WPI_VAP(vap)->newstate(vap, IEEE80211_S_AUTH, arg); 3695 if (vap->iv_newstate_cb != NULL) 3696 vap->iv_newstate_cb(vap, IEEE80211_S_AUTH, arg); 3697 IEEE80211_UNLOCK(ic); 3698 goto again; 3699 3700 case WPI_RUN: 3701 error = wpi_run(sc, vap); 3702 WPI_UNLOCK(sc); 3703 if (error != 0) { 3704 device_printf(sc->sc_dev, 3705 "%s: could not move to run state, error %d\n", 3706 __func__, error); 3707 return; 3708 } 3709 IEEE80211_LOCK(ic); 3710 WPI_VAP(vap)->newstate(vap, IEEE80211_S_RUN, arg); 3711 if (vap->iv_newstate_cb != NULL) 3712 vap->iv_newstate_cb(vap, IEEE80211_S_RUN, arg); 3713 IEEE80211_UNLOCK(ic); 3714 goto again; 3715 } 3716 WPI_UNLOCK(sc); 3717 3718 /* Take another pass */ 3719 goto again; 3720} 3721 3722/** 3723 * queue a command for later execution in a different thread. 3724 * This is needed as the net80211 callbacks do not allow 3725 * sleeping, since we need to sleep to confirm commands have 3726 * been processed by the firmware, we must defer execution to 3727 * a sleep enabled thread. 3728 */ 3729static int 3730wpi_queue_cmd(struct wpi_softc *sc, int cmd, int arg, int flush) 3731{ 3732 WPI_CMD_LOCK(sc); 3733 3734 if (flush) { 3735 memset(sc->sc_cmd, 0, sizeof (sc->sc_cmd)); 3736 memset(sc->sc_cmd_arg, 0, sizeof (sc->sc_cmd_arg)); 3737 sc->sc_cmd_cur = 0; 3738 sc->sc_cmd_next = 0; 3739 } 3740 3741 if (sc->sc_cmd[sc->sc_cmd_next] != 0) { 3742 WPI_CMD_UNLOCK(sc); 3743 DPRINTF(("%s: command %d dropped\n", __func__, cmd)); 3744 return (EBUSY); 3745 } 3746 3747 sc->sc_cmd[sc->sc_cmd_next] = cmd; 3748 sc->sc_cmd_arg[sc->sc_cmd_next] = arg; 3749 sc->sc_cmd_next = (sc->sc_cmd_next + 1) % WPI_CMD_MAXOPS; 3750 3751 taskqueue_enqueue(sc->sc_tq, &sc->sc_opstask); 3752 3753 WPI_CMD_UNLOCK(sc); 3754 3755 return 0; 3756} 3757 3758/* 3759 * Allocate DMA-safe memory for firmware transfer. 3760 */ 3761static int 3762wpi_alloc_fwmem(struct wpi_softc *sc) 3763{ 3764 /* allocate enough contiguous space to store text and data */ 3765 return wpi_dma_contig_alloc(sc, &sc->fw_dma, NULL, 3766 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 1, 3767 BUS_DMA_NOWAIT); 3768} 3769 3770static void 3771wpi_free_fwmem(struct wpi_softc *sc) 3772{ 3773 wpi_dma_contig_free(&sc->fw_dma); 3774} 3775 3776/** 3777 * Called every second, wpi_watchdog used by the watch dog timer 3778 * to check that the card is still alive 3779 */ 3780static void 3781wpi_watchdog(void *arg) 3782{ 3783 struct wpi_softc *sc = arg; 3784 struct ifnet *ifp = sc->sc_ifp; 3785 uint32_t tmp; 3786 3787 DPRINTFN(WPI_DEBUG_WATCHDOG,("Watchdog: tick\n")); 3788 3789 if (sc->flags & WPI_FLAG_HW_RADIO_OFF) { 3790 /* No need to lock firmware memory */ 3791 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF); 3792 3793 if ((tmp & 0x1) == 0) { 3794 /* Radio kill switch is still off */ 3795 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc); 3796 return; 3797 } 3798 3799 device_printf(sc->sc_dev, "Hardware Switch Enabled\n"); 3800 wpi_queue_cmd(sc, WPI_RF_RESTART, 0, WPI_QUEUE_CLEAR); 3801 return; 3802 } 3803 3804 if (sc->sc_tx_timer > 0) { 3805 if (--sc->sc_tx_timer == 0) { 3806 device_printf(sc->sc_dev,"device timeout\n"); 3807 ifp->if_oerrors++; 3808 wpi_queue_cmd(sc, WPI_RESTART, 0, WPI_QUEUE_CLEAR); 3809 } 3810 } 3811 if (sc->sc_scan_timer > 0) { 3812 struct ifnet *ifp = sc->sc_ifp; 3813 struct ieee80211com *ic = ifp->if_l2com; 3814 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3815 if (--sc->sc_scan_timer == 0 && vap != NULL) { 3816 device_printf(sc->sc_dev,"scan timeout\n"); 3817 ieee80211_cancel_scan(vap); 3818 wpi_queue_cmd(sc, WPI_RESTART, 0, WPI_QUEUE_CLEAR); 3819 } 3820 } 3821 3822 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 3823 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc); 3824} 3825 3826#ifdef WPI_DEBUG 3827static const char *wpi_cmd_str(int cmd) 3828{ 3829 switch (cmd) { 3830 case WPI_DISABLE_CMD: return "WPI_DISABLE_CMD"; 3831 case WPI_CMD_CONFIGURE: return "WPI_CMD_CONFIGURE"; 3832 case WPI_CMD_ASSOCIATE: return "WPI_CMD_ASSOCIATE"; 3833 case WPI_CMD_SET_WME: return "WPI_CMD_SET_WME"; 3834 case WPI_CMD_TSF: return "WPI_CMD_TSF"; 3835 case WPI_CMD_ADD_NODE: return "WPI_CMD_ADD_NODE"; 3836 case WPI_CMD_TX_DATA: return "WPI_CMD_TX_DATA"; 3837 case WPI_CMD_MRR_SETUP: return "WPI_CMD_MRR_SETUP"; 3838 case WPI_CMD_SET_LED: return "WPI_CMD_SET_LED"; 3839 case WPI_CMD_SET_POWER_MODE: return "WPI_CMD_SET_POWER_MODE"; 3840 case WPI_CMD_SCAN: return "WPI_CMD_SCAN"; 3841 case WPI_CMD_SET_BEACON:return "WPI_CMD_SET_BEACON"; 3842 case WPI_CMD_TXPOWER: return "WPI_CMD_TXPOWER"; 3843 case WPI_CMD_BLUETOOTH: return "WPI_CMD_BLUETOOTH"; 3844 3845 default: 3846 KASSERT(1, ("Unknown Command: %d\n", cmd)); 3847 return "UNKNOWN CMD"; /* Make the compiler happy */ 3848 } 3849} 3850#endif 3851 3852MODULE_DEPEND(wpi, pci, 1, 1, 1); 3853MODULE_DEPEND(wpi, wlan, 1, 1, 1); 3854MODULE_DEPEND(wpi, firmware, 1, 1, 1); 3855MODULE_DEPEND(wpi, wlan_amrr, 1, 1, 1); 3856