Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/netif/wpi/if_wpi.c
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1 /*- 2 * Copyright (c) 2006,2007 3 * Damien Bergamini <damien.bergamini@free.fr> 4 * Benjamin Close <Benjamin.Close@clearchain.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 * 18 * $FreeBSD: src/sys/dev/wpi/if_wpi.c,v 1.27.2.2 2010/02/14 09:34:27 gavin Exp $ 19 */ 20 21 #define VERSION "20071127" 22 23 /* 24 * Driver for Intel PRO/Wireless 3945ABG 802.11 network adapters. 25 * 26 * The 3945ABG network adapter doesn't use traditional hardware as 27 * many other adaptors do. Instead at run time the eeprom is set into a known 28 * state and told to load boot firmware. The boot firmware loads an init and a 29 * main binary firmware image into SRAM on the card via DMA. 30 * Once the firmware is loaded, the driver/hw then 31 * communicate by way of circular dma rings via the the SRAM to the firmware. 32 * 33 * There is 6 memory rings. 1 command ring, 1 rx data ring & 4 tx data rings. 34 * The 4 tx data rings allow for prioritization QoS. 35 * 36 * The rx data ring consists of 32 dma buffers. Two registers are used to 37 * indicate where in the ring the driver and the firmware are up to. The 38 * driver sets the initial read index (reg1) and the initial write index (reg2), 39 * the firmware updates the read index (reg1) on rx of a packet and fires an 40 * interrupt. The driver then processes the buffers starting at reg1 indicating 41 * to the firmware which buffers have been accessed by updating reg2. At the 42 * same time allocating new memory for the processed buffer. 43 * 44 * A similar thing happens with the tx rings. The difference is the firmware 45 * stop processing buffers once the queue is full and until confirmation 46 * of a successful transmition (tx_intr) has occurred. 47 * 48 * The command ring operates in the same manner as the tx queues. 49 * 50 * All communication direct to the card (ie eeprom) is classed as Stage1 51 * communication 52 * 53 * All communication via the firmware to the card is classed as State2. 54 * The firmware consists of 2 parts. A bootstrap firmware and a runtime 55 * firmware. The bootstrap firmware and runtime firmware are loaded 56 * from host memory via dma to the card then told to execute. From this point 57 * on the majority of communications between the driver and the card goes 58 * via the firmware. 59 */ 60 61 #include <sys/param.h> 62 #include <sys/sysctl.h> 63 #include <sys/sockio.h> 64 #include <sys/mbuf.h> 65 #include <sys/kernel.h> 66 #include <sys/socket.h> 67 #include <sys/systm.h> 68 #include <sys/malloc.h> 69 #include <sys/queue.h> 70 #include <sys/taskqueue.h> 71 #include <sys/module.h> 72 #include <sys/bus.h> 73 #include <sys/endian.h> 74 #include <sys/linker.h> 75 #include <sys/firmware.h> 76 77 #include <sys/resource.h> 78 #include <sys/rman.h> 79 80 #include <bus/pci/pcireg.h> 81 #include <bus/pci/pcivar.h> 82 83 #include <net/bpf.h> 84 #include <net/if.h> 85 #include <net/if_arp.h> 86 #include <net/ifq_var.h> 87 #include <net/ethernet.h> 88 #include <net/if_dl.h> 89 #include <net/if_media.h> 90 #include <net/if_types.h> 91 92 #include <netproto/802_11/ieee80211_var.h> 93 #include <netproto/802_11/ieee80211_radiotap.h> 94 #include <netproto/802_11/ieee80211_regdomain.h> 95 #include <netproto/802_11/ieee80211_ratectl.h> 96 97 #include <netinet/in.h> 98 #include <netinet/in_systm.h> 99 #include <netinet/in_var.h> 100 #include <netinet/ip.h> 101 #include <netinet/if_ether.h> 102 103 /* XXX: move elsewhere */ 104 #define abs(x) (((x) < 0) ? -(x) : (x)) 105 106 #include "if_wpireg.h" 107 #include "if_wpivar.h" 108 109 #define WPI_DEBUG 110 111 #ifdef WPI_DEBUG 112 #define DPRINTF(x) do { if (wpi_debug != 0) kprintf x; } while (0) 113 #define DPRINTFN(n, x) do { if (wpi_debug & n) kprintf x; } while (0) 114 #define WPI_DEBUG_SET (wpi_debug != 0) 115 116 enum { 117 WPI_DEBUG_UNUSED = 0x00000001, /* Unused */ 118 WPI_DEBUG_HW = 0x00000002, /* Stage 1 (eeprom) debugging */ 119 WPI_DEBUG_TX = 0x00000004, /* Stage 2 TX intrp debugging*/ 120 WPI_DEBUG_RX = 0x00000008, /* Stage 2 RX intrp debugging */ 121 WPI_DEBUG_CMD = 0x00000010, /* Stage 2 CMD intrp debugging*/ 122 WPI_DEBUG_FIRMWARE = 0x00000020, /* firmware(9) loading debug */ 123 WPI_DEBUG_DMA = 0x00000040, /* DMA (de)allocations/syncs */ 124 WPI_DEBUG_SCANNING = 0x00000080, /* Stage 2 Scanning debugging */ 125 WPI_DEBUG_NOTIFY = 0x00000100, /* State 2 Noftif intr debug */ 126 WPI_DEBUG_TEMP = 0x00000200, /* TXPower/Temp Calibration */ 127 WPI_DEBUG_OPS = 0x00000400, /* wpi_ops taskq debug */ 128 WPI_DEBUG_WATCHDOG = 0x00000800, /* Watch dog debug */ 129 WPI_DEBUG_ANY = 0xffffffff 130 }; 131 132 static int wpi_debug = 1; 133 SYSCTL_INT(_debug, OID_AUTO, wpi, CTLFLAG_RW, &wpi_debug, 0, "wpi debug level"); 134 TUNABLE_INT("debug.wpi", &wpi_debug); 135 136 #else 137 #define DPRINTF(x) 138 #define DPRINTFN(n, x) 139 #define WPI_DEBUG_SET 0 140 #endif 141 142 struct wpi_ident { 143 uint16_t vendor; 144 uint16_t device; 145 uint16_t subdevice; 146 const char *name; 147 }; 148 149 static const struct wpi_ident wpi_ident_table[] = { 150 /* The below entries support ABG regardless of the subid */ 151 { 0x8086, 0x4222, 0x0, "Intel(R) PRO/Wireless 3945ABG" }, 152 { 0x8086, 0x4227, 0x0, "Intel(R) PRO/Wireless 3945ABG" }, 153 /* The below entries only support BG */ 154 { 0x8086, 0x4222, 0x1005, "Intel(R) PRO/Wireless 3945BG" }, 155 { 0x8086, 0x4222, 0x1034, "Intel(R) PRO/Wireless 3945BG" }, 156 { 0x8086, 0x4227, 0x1014, "Intel(R) PRO/Wireless 3945BG" }, 157 { 0x8086, 0x4222, 0x1044, "Intel(R) PRO/Wireless 3945BG" }, 158 { 0, 0, 0, NULL } 159 }; 160 161 static struct ieee80211vap *wpi_vap_create(struct ieee80211com *, 162 const char name[IFNAMSIZ], int unit, 163 enum ieee80211_opmode opmode, 164 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN], 165 const uint8_t mac[IEEE80211_ADDR_LEN]); 166 static void wpi_vap_delete(struct ieee80211vap *); 167 static int wpi_dma_contig_alloc(struct wpi_softc *, struct wpi_dma_info *, 168 void **, bus_size_t, bus_size_t, int); 169 static void wpi_dma_contig_free(struct wpi_dma_info *); 170 static void wpi_dma_map_addr(void *, bus_dma_segment_t *, int, int); 171 static int wpi_alloc_shared(struct wpi_softc *); 172 static void wpi_free_shared(struct wpi_softc *); 173 static int wpi_alloc_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 174 static void wpi_reset_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 175 static void wpi_free_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 176 static int wpi_alloc_tx_ring(struct wpi_softc *, struct wpi_tx_ring *, 177 int, int); 178 static void wpi_reset_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 179 static void wpi_free_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 180 static struct ieee80211_node *wpi_node_alloc(struct ieee80211vap *, 181 const uint8_t mac[IEEE80211_ADDR_LEN]); 182 static int wpi_newstate(struct ieee80211vap *, enum ieee80211_state, int); 183 static void wpi_mem_lock(struct wpi_softc *); 184 static void wpi_mem_unlock(struct wpi_softc *); 185 static uint32_t wpi_mem_read(struct wpi_softc *, uint16_t); 186 static void wpi_mem_write(struct wpi_softc *, uint16_t, uint32_t); 187 static void wpi_mem_write_region_4(struct wpi_softc *, uint16_t, 188 const uint32_t *, int); 189 static uint16_t wpi_read_prom_data(struct wpi_softc *, uint32_t, void *, int); 190 static int wpi_alloc_fwmem(struct wpi_softc *); 191 static void wpi_free_fwmem(struct wpi_softc *); 192 static int wpi_load_firmware(struct wpi_softc *); 193 static void wpi_unload_firmware(struct wpi_softc *); 194 static int wpi_load_microcode(struct wpi_softc *, const uint8_t *, int); 195 static void wpi_rx_intr(struct wpi_softc *, struct wpi_rx_desc *, 196 struct wpi_rx_data *); 197 static void wpi_tx_intr(struct wpi_softc *, struct wpi_rx_desc *); 198 static void wpi_cmd_intr(struct wpi_softc *, struct wpi_rx_desc *); 199 static void wpi_notif_intr(struct wpi_softc *); 200 static void wpi_intr(void *); 201 static uint8_t wpi_plcp_signal(int); 202 static void wpi_watchdog_callout(void *); 203 static int wpi_tx_data(struct wpi_softc *, struct mbuf *, 204 struct ieee80211_node *, int); 205 static void wpi_start(struct ifnet *, struct ifaltq_subque *); 206 static void wpi_start_locked(struct ifnet *); 207 static int wpi_raw_xmit(struct ieee80211_node *, struct mbuf *, 208 const struct ieee80211_bpf_params *); 209 static void wpi_scan_start(struct ieee80211com *); 210 static void wpi_scan_end(struct ieee80211com *); 211 static void wpi_set_channel(struct ieee80211com *); 212 static void wpi_scan_curchan(struct ieee80211_scan_state *, unsigned long); 213 static void wpi_scan_mindwell(struct ieee80211_scan_state *); 214 static int wpi_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *); 215 static void wpi_read_eeprom(struct wpi_softc *, 216 uint8_t macaddr[IEEE80211_ADDR_LEN]); 217 static void wpi_read_eeprom_channels(struct wpi_softc *, int); 218 static void wpi_read_eeprom_group(struct wpi_softc *, int); 219 static int wpi_cmd(struct wpi_softc *, int, const void *, int, int); 220 static int wpi_wme_update(struct ieee80211com *); 221 static int wpi_mrr_setup(struct wpi_softc *); 222 static void wpi_set_led(struct wpi_softc *, uint8_t, uint8_t, uint8_t); 223 static void wpi_enable_tsf(struct wpi_softc *, struct ieee80211_node *); 224 #if 0 225 static int wpi_setup_beacon(struct wpi_softc *, struct ieee80211_node *); 226 #endif 227 static int wpi_auth(struct wpi_softc *, struct ieee80211vap *); 228 static int wpi_run(struct wpi_softc *, struct ieee80211vap *); 229 static int wpi_scan(struct wpi_softc *); 230 static int wpi_config(struct wpi_softc *); 231 static void wpi_stop_master(struct wpi_softc *); 232 static int wpi_power_up(struct wpi_softc *); 233 static int wpi_reset(struct wpi_softc *); 234 static void wpi_hwreset_task(void *, int); 235 static void wpi_rfreset_task(void *, int); 236 static void wpi_hw_config(struct wpi_softc *); 237 static void wpi_init(void *); 238 static void wpi_init_locked(struct wpi_softc *, int); 239 static void wpi_stop(struct wpi_softc *); 240 static void wpi_stop_locked(struct wpi_softc *); 241 242 static void wpi_newassoc(struct ieee80211_node *, int); 243 static int wpi_set_txpower(struct wpi_softc *, struct ieee80211_channel *, 244 int); 245 static void wpi_calib_timeout_callout(void *); 246 static void wpi_power_calibration(struct wpi_softc *, int); 247 static int wpi_get_power_index(struct wpi_softc *, 248 struct wpi_power_group *, struct ieee80211_channel *, int); 249 #ifdef WPI_DEBUG 250 static const char *wpi_cmd_str(int); 251 #endif 252 static int wpi_probe(device_t); 253 static int wpi_attach(device_t); 254 static int wpi_detach(device_t); 255 static int wpi_shutdown(device_t); 256 static int wpi_suspend(device_t); 257 static int wpi_resume(device_t); 258 259 260 static device_method_t wpi_methods[] = { 261 /* Device interface */ 262 DEVMETHOD(device_probe, wpi_probe), 263 DEVMETHOD(device_attach, wpi_attach), 264 DEVMETHOD(device_detach, wpi_detach), 265 DEVMETHOD(device_shutdown, wpi_shutdown), 266 DEVMETHOD(device_suspend, wpi_suspend), 267 DEVMETHOD(device_resume, wpi_resume), 268 269 DEVMETHOD_END 270 }; 271 272 static driver_t wpi_driver = { 273 "wpi", 274 wpi_methods, 275 sizeof (struct wpi_softc) 276 }; 277 278 static devclass_t wpi_devclass; 279 280 DRIVER_MODULE(wpi, pci, wpi_driver, wpi_devclass, NULL, NULL); 281 282 static const uint8_t wpi_ridx_to_plcp[] = { 283 /* OFDM: IEEE Std 802.11a-1999, pp. 14 Table 80 */ 284 /* R1-R4 (ral/ural is R4-R1) */ 285 0xd, 0xf, 0x5, 0x7, 0x9, 0xb, 0x1, 0x3, 286 /* CCK: device-dependent */ 287 10, 20, 55, 110 288 }; 289 static const uint8_t wpi_ridx_to_rate[] = { 290 12, 18, 24, 36, 48, 72, 96, 108, /* OFDM */ 291 2, 4, 11, 22 /*CCK */ 292 }; 293 294 295 static int 296 wpi_probe(device_t dev) 297 { 298 const struct wpi_ident *ident; 299 300 wlan_serialize_enter(); 301 for (ident = wpi_ident_table; ident->name != NULL; ident++) { 302 if (pci_get_vendor(dev) == ident->vendor && 303 pci_get_device(dev) == ident->device) { 304 device_set_desc(dev, ident->name); 305 wlan_serialize_exit(); 306 return 0; 307 } 308 } 309 wlan_serialize_exit(); 310 return ENXIO; 311 } 312 313 /** 314 * Load the firmare image from disk to the allocated dma buffer. 315 * we also maintain the reference to the firmware pointer as there 316 * is times where we may need to reload the firmware but we are not 317 * in a context that can access the filesystem (ie taskq cause by restart) 318 * 319 * @return 0 on success, an errno on failure 320 */ 321 static int 322 wpi_load_firmware(struct wpi_softc *sc) 323 { 324 const struct firmware *fp; 325 struct wpi_dma_info *dma = &sc->fw_dma; 326 const struct wpi_firmware_hdr *hdr; 327 const uint8_t *itext, *idata, *rtext, *rdata, *btext; 328 uint32_t itextsz, idatasz, rtextsz, rdatasz, btextsz; 329 int error; 330 331 DPRINTFN(WPI_DEBUG_FIRMWARE, 332 ("Attempting Loading Firmware from wpi_fw module\n")); 333 334 wlan_assert_serialized(); 335 wlan_serialize_exit(); 336 if (sc->fw_fp == NULL && (sc->fw_fp = firmware_get("wpifw")) == NULL) { 337 device_printf(sc->sc_dev, 338 "could not load firmware image 'wpifw_fw'\n"); 339 error = ENOENT; 340 wlan_serialize_enter(); 341 goto fail; 342 } 343 wlan_serialize_enter(); 344 345 fp = sc->fw_fp; 346 347 /* Validate the firmware is minimum a particular version */ 348 if (fp->version < WPI_FW_MINVERSION) { 349 device_printf(sc->sc_dev, 350 "firmware version is too old. Need %d, got %d\n", 351 WPI_FW_MINVERSION, 352 fp->version); 353 error = ENXIO; 354 goto fail; 355 } 356 357 if (fp->datasize < sizeof (struct wpi_firmware_hdr)) { 358 device_printf(sc->sc_dev, 359 "firmware file too short: %zu bytes\n", fp->datasize); 360 error = ENXIO; 361 goto fail; 362 } 363 364 hdr = (const struct wpi_firmware_hdr *)fp->data; 365 366 /* | RUNTIME FIRMWARE | INIT FIRMWARE | BOOT FW | 367 |HDR|<--TEXT-->|<--DATA-->|<--TEXT-->|<--DATA-->|<--TEXT-->| */ 368 369 rtextsz = le32toh(hdr->rtextsz); 370 rdatasz = le32toh(hdr->rdatasz); 371 itextsz = le32toh(hdr->itextsz); 372 idatasz = le32toh(hdr->idatasz); 373 btextsz = le32toh(hdr->btextsz); 374 375 /* check that all firmware segments are present */ 376 if (fp->datasize < sizeof (struct wpi_firmware_hdr) + 377 rtextsz + rdatasz + itextsz + idatasz + btextsz) { 378 device_printf(sc->sc_dev, 379 "firmware file too short: %zu bytes\n", fp->datasize); 380 error = ENXIO; /* XXX appropriate error code? */ 381 goto fail; 382 } 383 384 /* get pointers to firmware segments */ 385 rtext = (const uint8_t *)(hdr + 1); 386 rdata = rtext + rtextsz; 387 itext = rdata + rdatasz; 388 idata = itext + itextsz; 389 btext = idata + idatasz; 390 391 DPRINTFN(WPI_DEBUG_FIRMWARE, 392 ("Firmware Version: Major %d, Minor %d, Driver %d, \n" 393 "runtime (text: %u, data: %u) init (text: %u, data %u) boot (text %u)\n", 394 (le32toh(hdr->version) & 0xff000000) >> 24, 395 (le32toh(hdr->version) & 0x00ff0000) >> 16, 396 (le32toh(hdr->version) & 0x0000ffff), 397 rtextsz, rdatasz, 398 itextsz, idatasz, btextsz)); 399 400 DPRINTFN(WPI_DEBUG_FIRMWARE,("rtext 0x%x\n", *(const uint32_t *)rtext)); 401 DPRINTFN(WPI_DEBUG_FIRMWARE,("rdata 0x%x\n", *(const uint32_t *)rdata)); 402 DPRINTFN(WPI_DEBUG_FIRMWARE,("itext 0x%x\n", *(const uint32_t *)itext)); 403 DPRINTFN(WPI_DEBUG_FIRMWARE,("idata 0x%x\n", *(const uint32_t *)idata)); 404 DPRINTFN(WPI_DEBUG_FIRMWARE,("btext 0x%x\n", *(const uint32_t *)btext)); 405 406 /* sanity checks */ 407 if (rtextsz > WPI_FW_MAIN_TEXT_MAXSZ || 408 rdatasz > WPI_FW_MAIN_DATA_MAXSZ || 409 itextsz > WPI_FW_INIT_TEXT_MAXSZ || 410 idatasz > WPI_FW_INIT_DATA_MAXSZ || 411 btextsz > WPI_FW_BOOT_TEXT_MAXSZ || 412 (btextsz & 3) != 0) { 413 device_printf(sc->sc_dev, "firmware invalid\n"); 414 error = EINVAL; 415 goto fail; 416 } 417 418 /* copy initialization images into pre-allocated DMA-safe memory */ 419 memcpy(dma->vaddr, idata, idatasz); 420 memcpy(dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, itext, itextsz); 421 422 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE); 423 424 /* tell adapter where to find initialization images */ 425 wpi_mem_lock(sc); 426 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 427 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, idatasz); 428 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 429 dma->paddr + WPI_FW_INIT_DATA_MAXSZ); 430 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, itextsz); 431 wpi_mem_unlock(sc); 432 433 /* load firmware boot code */ 434 if ((error = wpi_load_microcode(sc, btext, btextsz)) != 0) { 435 device_printf(sc->sc_dev, "Failed to load microcode\n"); 436 goto fail; 437 } 438 439 /* now press "execute" */ 440 WPI_WRITE(sc, WPI_RESET, 0); 441 442 /* wait at most one second for the first alive notification */ 443 if ((error = zsleep(sc, &wlan_global_serializer, 0, "wpiinit", hz)) != 0) { 444 device_printf(sc->sc_dev, 445 "timeout waiting for adapter to initialize\n"); 446 goto fail; 447 } 448 449 /* copy runtime images into pre-allocated DMA-sage memory */ 450 memcpy(dma->vaddr, rdata, rdatasz); 451 memcpy(dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, rtext, rtextsz); 452 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE); 453 454 /* tell adapter where to find runtime images */ 455 wpi_mem_lock(sc); 456 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 457 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, rdatasz); 458 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 459 dma->paddr + WPI_FW_MAIN_DATA_MAXSZ); 460 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | rtextsz); 461 wpi_mem_unlock(sc); 462 463 /* wait at most one second for the first alive notification */ 464 if ((error = zsleep(sc, &wlan_global_serializer, 0, "wpiinit", hz)) != 0) { 465 device_printf(sc->sc_dev, 466 "timeout waiting for adapter to initialize2\n"); 467 goto fail; 468 } 469 470 DPRINTFN(WPI_DEBUG_FIRMWARE, 471 ("Firmware loaded to driver successfully\n")); 472 return error; 473 fail: 474 wpi_unload_firmware(sc); 475 return error; 476 } 477 478 /** 479 * Free the referenced firmware image 480 */ 481 static void 482 wpi_unload_firmware(struct wpi_softc *sc) 483 { 484 if (sc->fw_fp) { 485 wlan_assert_serialized(); 486 wlan_serialize_exit(); 487 firmware_put(sc->fw_fp, FIRMWARE_UNLOAD); 488 wlan_serialize_enter(); 489 sc->fw_fp = NULL; 490 } 491 } 492 493 static int 494 wpi_attach(device_t dev) 495 { 496 struct wpi_softc *sc; 497 struct ifnet *ifp; 498 struct ieee80211com *ic; 499 int ac, error, supportsa = 1; 500 uint32_t tmp; 501 const struct wpi_ident *ident; 502 uint8_t macaddr[IEEE80211_ADDR_LEN]; 503 504 wlan_serialize_enter(); 505 sc = device_get_softc(dev); 506 sc->sc_dev = dev; 507 508 if (bootverbose || WPI_DEBUG_SET) 509 device_printf(sc->sc_dev,"Driver Revision %s\n", VERSION); 510 511 /* 512 * Some card's only support 802.11b/g not a, check to see if 513 * this is one such card. A 0x0 in the subdevice table indicates 514 * the entire subdevice range is to be ignored. 515 */ 516 for (ident = wpi_ident_table; ident->name != NULL; ident++) { 517 if (ident->subdevice && 518 pci_get_subdevice(dev) == ident->subdevice) { 519 supportsa = 0; 520 break; 521 } 522 } 523 524 /* Create the tasks that can be queued */ 525 TASK_INIT(&sc->sc_restarttask, 0, wpi_hwreset_task, sc); 526 TASK_INIT(&sc->sc_radiotask, 0, wpi_rfreset_task, sc); 527 528 callout_init(&sc->calib_to_callout); 529 callout_init(&sc->watchdog_to_callout); 530 531 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 532 device_printf(dev, "chip is in D%d power mode " 533 "-- setting to D0\n", pci_get_powerstate(dev)); 534 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 535 } 536 537 /* disable the retry timeout register */ 538 pci_write_config(dev, 0x41, 0, 1); 539 540 /* enable bus-mastering */ 541 pci_enable_busmaster(dev); 542 543 sc->mem_rid = PCIR_BAR(0); 544 sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid, 545 RF_ACTIVE); 546 if (sc->mem == NULL) { 547 device_printf(dev, "could not allocate memory resource\n"); 548 error = ENOMEM; 549 goto fail; 550 } 551 552 sc->sc_st = rman_get_bustag(sc->mem); 553 sc->sc_sh = rman_get_bushandle(sc->mem); 554 555 sc->irq_rid = 0; 556 sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid, 557 RF_ACTIVE | RF_SHAREABLE); 558 if (sc->irq == NULL) { 559 device_printf(dev, "could not allocate interrupt resource\n"); 560 error = ENOMEM; 561 goto fail; 562 } 563 564 /* 565 * Allocate DMA memory for firmware transfers. 566 */ 567 if ((error = wpi_alloc_fwmem(sc)) != 0) { 568 kprintf(": could not allocate firmware memory\n"); 569 error = ENOMEM; 570 goto fail; 571 } 572 573 /* 574 * Put adapter into a known state. 575 */ 576 if ((error = wpi_reset(sc)) != 0) { 577 device_printf(dev, "could not reset adapter\n"); 578 goto fail; 579 } 580 581 wpi_mem_lock(sc); 582 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 583 if (bootverbose || WPI_DEBUG_SET) 584 device_printf(sc->sc_dev, "Hardware Revision (0x%X)\n", tmp); 585 586 wpi_mem_unlock(sc); 587 588 /* Allocate shared page */ 589 if ((error = wpi_alloc_shared(sc)) != 0) { 590 device_printf(dev, "could not allocate shared page\n"); 591 goto fail; 592 } 593 594 /* tx data queues - 4 for QoS purposes */ 595 for (ac = 0; ac < WME_NUM_AC; ac++) { 596 error = wpi_alloc_tx_ring(sc, &sc->txq[ac], WPI_TX_RING_COUNT, ac); 597 if (error != 0) { 598 device_printf(dev, "could not allocate Tx ring %d\n",ac); 599 goto fail; 600 } 601 } 602 603 /* command queue to talk to the card's firmware */ 604 error = wpi_alloc_tx_ring(sc, &sc->cmdq, WPI_CMD_RING_COUNT, 4); 605 if (error != 0) { 606 device_printf(dev, "could not allocate command ring\n"); 607 goto fail; 608 } 609 610 /* receive data queue */ 611 error = wpi_alloc_rx_ring(sc, &sc->rxq); 612 if (error != 0) { 613 device_printf(dev, "could not allocate Rx ring\n"); 614 goto fail; 615 } 616 617 ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211); 618 if (ifp == NULL) { 619 device_printf(dev, "can not if_alloc()\n"); 620 error = ENOMEM; 621 goto fail; 622 } 623 ic = ifp->if_l2com; 624 625 ic->ic_ifp = ifp; 626 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 627 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 628 629 /* set device capabilities */ 630 ic->ic_caps = 631 IEEE80211_C_STA /* station mode supported */ 632 | IEEE80211_C_MONITOR /* monitor mode supported */ 633 | IEEE80211_C_TXPMGT /* tx power management */ 634 | IEEE80211_C_SHSLOT /* short slot time supported */ 635 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 636 | IEEE80211_C_WPA /* 802.11i */ 637 /* XXX looks like WME is partly supported? */ 638 #if 0 639 | IEEE80211_C_IBSS /* IBSS mode support */ 640 | IEEE80211_C_BGSCAN /* capable of bg scanning */ 641 | IEEE80211_C_WME /* 802.11e */ 642 | IEEE80211_C_HOSTAP /* Host access point mode */ 643 #endif 644 ; 645 646 /* 647 * Read in the eeprom and also setup the channels for 648 * net80211. We don't set the rates as net80211 does this for us 649 */ 650 wpi_read_eeprom(sc, macaddr); 651 652 if (bootverbose || WPI_DEBUG_SET) { 653 device_printf(sc->sc_dev, "Regulatory Domain: %.4s\n", sc->domain); 654 device_printf(sc->sc_dev, "Hardware Type: %c\n", 655 sc->type > 1 ? 'B': '?'); 656 device_printf(sc->sc_dev, "Hardware Revision: %c\n", 657 ((le16toh(sc->rev) & 0xf0) == 0xd0) ? 'D': '?'); 658 device_printf(sc->sc_dev, "SKU %s support 802.11a\n", 659 supportsa ? "does" : "does not"); 660 661 /* XXX hw_config uses the PCIDEV for the Hardware rev. Must check 662 what sc->rev really represents - benjsc 20070615 */ 663 } 664 665 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 666 ifp->if_softc = sc; 667 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 668 ifp->if_init = wpi_init; 669 ifp->if_ioctl = wpi_ioctl; 670 ifp->if_start = wpi_start; 671 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN); 672 #ifdef notyet 673 ifq_set_ready(&ifp->if_snd); 674 #endif 675 676 ieee80211_ifattach(ic, macaddr); 677 /* override default methods */ 678 ic->ic_node_alloc = wpi_node_alloc; 679 ic->ic_newassoc = wpi_newassoc; 680 ic->ic_raw_xmit = wpi_raw_xmit; 681 ic->ic_wme.wme_update = wpi_wme_update; 682 ic->ic_scan_start = wpi_scan_start; 683 ic->ic_scan_end = wpi_scan_end; 684 ic->ic_set_channel = wpi_set_channel; 685 ic->ic_scan_curchan = wpi_scan_curchan; 686 ic->ic_scan_mindwell = wpi_scan_mindwell; 687 688 ic->ic_vap_create = wpi_vap_create; 689 ic->ic_vap_delete = wpi_vap_delete; 690 691 ieee80211_radiotap_attach(ic, 692 &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap), 693 WPI_TX_RADIOTAP_PRESENT, 694 &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap), 695 WPI_RX_RADIOTAP_PRESENT); 696 697 /* 698 * Hook our interrupt after all initialization is complete. 699 */ 700 error = bus_setup_intr(dev, sc->irq, INTR_MPSAFE, 701 wpi_intr, sc, &sc->sc_ih, &wlan_global_serializer); 702 if (error != 0) { 703 device_printf(dev, "could not set up interrupt\n"); 704 goto fail; 705 } 706 707 if (bootverbose) 708 ieee80211_announce(ic); 709 #ifdef XXX_DEBUG 710 ieee80211_announce_channels(ic); 711 #endif 712 wlan_serialize_exit(); 713 return 0; 714 715 fail: 716 wlan_serialize_exit(); 717 wpi_detach(dev); 718 return ENXIO; 719 } 720 721 static int 722 wpi_detach(device_t dev) 723 { 724 struct wpi_softc *sc; 725 struct ifnet *ifp; 726 struct ieee80211com *ic; 727 int ac; 728 729 wlan_serialize_enter(); 730 sc = device_get_softc(dev); 731 ifp = sc->sc_ifp; 732 if (ifp != NULL) { 733 ic = ifp->if_l2com; 734 735 ieee80211_draintask(ic, &sc->sc_restarttask); 736 ieee80211_draintask(ic, &sc->sc_radiotask); 737 wpi_stop(sc); 738 callout_stop(&sc->watchdog_to_callout); 739 callout_stop(&sc->calib_to_callout); 740 ieee80211_ifdetach(ic); 741 } 742 743 if (sc->txq[0].data_dmat) { 744 for (ac = 0; ac < WME_NUM_AC; ac++) 745 wpi_free_tx_ring(sc, &sc->txq[ac]); 746 747 wpi_free_tx_ring(sc, &sc->cmdq); 748 wpi_free_rx_ring(sc, &sc->rxq); 749 wpi_free_shared(sc); 750 } 751 752 if (sc->fw_fp != NULL) { 753 wpi_unload_firmware(sc); 754 } 755 756 if (sc->fw_dma.tag) 757 wpi_free_fwmem(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 wlan_serialize_exit(); 771 return 0; 772 } 773 774 static struct ieee80211vap * 775 wpi_vap_create(struct ieee80211com *ic, 776 const char name[IFNAMSIZ], int unit, 777 enum ieee80211_opmode opmode, int flags, 778 const uint8_t bssid[IEEE80211_ADDR_LEN], 779 const uint8_t mac[IEEE80211_ADDR_LEN]) 780 { 781 struct wpi_vap *wvp; 782 struct ieee80211vap *vap; 783 784 if (!TAILQ_EMPTY(&ic->ic_vaps)) /* only one at a time */ 785 return NULL; 786 wvp = (struct wpi_vap *) kmalloc(sizeof(struct wpi_vap), 787 M_80211_VAP, M_INTWAIT | M_ZERO); 788 if (wvp == NULL) 789 return NULL; 790 vap = &wvp->vap; 791 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac); 792 /* override with driver methods */ 793 wvp->newstate = vap->iv_newstate; 794 vap->iv_newstate = wpi_newstate; 795 796 ieee80211_ratectl_init(vap); 797 798 /* complete setup */ 799 ieee80211_vap_attach(vap, ieee80211_media_change, ieee80211_media_status); 800 ic->ic_opmode = opmode; 801 return vap; 802 } 803 804 static void 805 wpi_vap_delete(struct ieee80211vap *vap) 806 { 807 struct wpi_vap *wvp = WPI_VAP(vap); 808 809 ieee80211_ratectl_deinit(vap); 810 ieee80211_vap_detach(vap); 811 kfree(wvp, M_80211_VAP); 812 } 813 814 static void 815 wpi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 816 { 817 if (error != 0) 818 return; 819 820 KASSERT(nsegs == 1, ("too many DMA segments, %d should be 1", nsegs)); 821 822 *(bus_addr_t *)arg = segs[0].ds_addr; 823 } 824 825 /* 826 * Allocates a contiguous block of dma memory of the requested size and 827 * alignment. Due to limitations of the FreeBSD dma subsystem as of 20071217, 828 * allocations greater than 4096 may fail. Hence if the requested alignment is 829 * greater we allocate 'alignment' size extra memory and shift the vaddr and 830 * paddr after the dma load. This bypasses the problem at the cost of a little 831 * more memory. 832 */ 833 static int 834 wpi_dma_contig_alloc(struct wpi_softc *sc, struct wpi_dma_info *dma, 835 void **kvap, bus_size_t size, bus_size_t alignment, int flags) 836 { 837 int error; 838 bus_size_t align; 839 bus_size_t reqsize; 840 841 DPRINTFN(WPI_DEBUG_DMA, 842 ("Size: %zd - alignment %zd\n", size, alignment)); 843 844 dma->size = size; 845 dma->tag = NULL; 846 847 if (alignment > 4096) { 848 align = PAGE_SIZE; 849 reqsize = size + alignment; 850 } else { 851 align = alignment; 852 reqsize = size; 853 } 854 error = bus_dma_tag_create(dma->tag, align, 855 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, 856 NULL, NULL, reqsize, 857 1, reqsize, flags, 858 &dma->tag); 859 if (error != 0) { 860 device_printf(sc->sc_dev, 861 "could not create shared page DMA tag\n"); 862 goto fail; 863 } 864 error = bus_dmamem_alloc(dma->tag, (void **)&dma->vaddr_start, 865 flags | BUS_DMA_ZERO, &dma->map); 866 if (error != 0) { 867 device_printf(sc->sc_dev, 868 "could not allocate shared page DMA memory\n"); 869 goto fail; 870 } 871 872 error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr_start, 873 reqsize, wpi_dma_map_addr, &dma->paddr_start, flags); 874 875 /* Save the original pointers so we can free all the memory */ 876 dma->paddr = dma->paddr_start; 877 dma->vaddr = dma->vaddr_start; 878 879 /* 880 * Check the alignment and increment by 4096 until we get the 881 * requested alignment. Fail if can't obtain the alignment 882 * we requested. 883 */ 884 if ((dma->paddr & (alignment -1 )) != 0) { 885 int i; 886 887 for (i = 0; i < alignment / 4096; i++) { 888 if ((dma->paddr & (alignment - 1 )) == 0) 889 break; 890 dma->paddr += 4096; 891 dma->vaddr += 4096; 892 } 893 if (i == alignment / 4096) { 894 device_printf(sc->sc_dev, 895 "alignment requirement was not satisfied\n"); 896 goto fail; 897 } 898 } 899 900 if (error != 0) { 901 device_printf(sc->sc_dev, 902 "could not load shared page DMA map\n"); 903 goto fail; 904 } 905 906 if (kvap != NULL) 907 *kvap = dma->vaddr; 908 909 return 0; 910 911 fail: 912 wpi_dma_contig_free(dma); 913 return error; 914 } 915 916 static void 917 wpi_dma_contig_free(struct wpi_dma_info *dma) 918 { 919 if (dma->tag) { 920 if (dma->map != NULL) { 921 if (dma->paddr_start != 0) { 922 bus_dmamap_sync(dma->tag, dma->map, 923 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 924 bus_dmamap_unload(dma->tag, dma->map); 925 } 926 bus_dmamem_free(dma->tag, &dma->vaddr_start, dma->map); 927 } 928 bus_dma_tag_destroy(dma->tag); 929 } 930 } 931 932 /* 933 * Allocate a shared page between host and NIC. 934 */ 935 static int 936 wpi_alloc_shared(struct wpi_softc *sc) 937 { 938 int error; 939 940 error = wpi_dma_contig_alloc(sc, &sc->shared_dma, 941 (void **)&sc->shared, sizeof (struct wpi_shared), 942 PAGE_SIZE, 943 BUS_DMA_NOWAIT); 944 945 if (error != 0) { 946 device_printf(sc->sc_dev, 947 "could not allocate shared area DMA memory\n"); 948 } 949 950 return error; 951 } 952 953 static void 954 wpi_free_shared(struct wpi_softc *sc) 955 { 956 wpi_dma_contig_free(&sc->shared_dma); 957 } 958 959 static int 960 wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 961 { 962 963 int i, error; 964 965 ring->cur = 0; 966 967 error = wpi_dma_contig_alloc(sc, &ring->desc_dma, 968 (void **)&ring->desc, WPI_RX_RING_COUNT * sizeof (uint32_t), 969 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 970 971 if (error != 0) { 972 device_printf(sc->sc_dev, 973 "%s: could not allocate rx ring DMA memory, error %d\n", 974 __func__, error); 975 goto fail; 976 } 977 978 error = bus_dma_tag_create(ring->data_dmat, 1, 0, 979 BUS_SPACE_MAXADDR_32BIT, 980 BUS_SPACE_MAXADDR, NULL, NULL, MJUMPAGESIZE, 1, 981 MJUMPAGESIZE, BUS_DMA_NOWAIT, &ring->data_dmat); 982 if (error != 0) { 983 device_printf(sc->sc_dev, 984 "%s: bus_dma_tag_create_failed, error %d\n", 985 __func__, error); 986 goto fail; 987 } 988 989 /* 990 * Setup Rx buffers. 991 */ 992 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 993 struct wpi_rx_data *data = &ring->data[i]; 994 struct mbuf *m; 995 bus_addr_t paddr; 996 997 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 998 if (error != 0) { 999 device_printf(sc->sc_dev, 1000 "%s: bus_dmamap_create failed, error %d\n", 1001 __func__, error); 1002 goto fail; 1003 } 1004 m = m_getjcl(MB_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE); 1005 if (m == NULL) { 1006 device_printf(sc->sc_dev, 1007 "%s: could not allocate rx mbuf\n", __func__); 1008 error = ENOMEM; 1009 goto fail; 1010 } 1011 /* map page */ 1012 error = bus_dmamap_load(ring->data_dmat, data->map, 1013 mtod(m, caddr_t), MJUMPAGESIZE, 1014 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT); 1015 if (error != 0 && error != EFBIG) { 1016 device_printf(sc->sc_dev, 1017 "%s: bus_dmamap_load failed, error %d\n", 1018 __func__, error); 1019 m_freem(m); 1020 error = ENOMEM; /* XXX unique code */ 1021 goto fail; 1022 } 1023 bus_dmamap_sync(ring->data_dmat, data->map, 1024 BUS_DMASYNC_PREWRITE); 1025 1026 data->m = m; 1027 ring->desc[i] = htole32(paddr); 1028 } 1029 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 1030 BUS_DMASYNC_PREWRITE); 1031 return 0; 1032 fail: 1033 wpi_free_rx_ring(sc, ring); 1034 return error; 1035 } 1036 1037 static void 1038 wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 1039 { 1040 int ntries; 1041 1042 wpi_mem_lock(sc); 1043 1044 WPI_WRITE(sc, WPI_RX_CONFIG, 0); 1045 1046 for (ntries = 0; ntries < 100; ntries++) { 1047 if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE) 1048 break; 1049 DELAY(10); 1050 } 1051 1052 wpi_mem_unlock(sc); 1053 1054 #ifdef WPI_DEBUG 1055 if (ntries == 100 && wpi_debug > 0) 1056 device_printf(sc->sc_dev, "timeout resetting Rx ring\n"); 1057 #endif 1058 1059 ring->cur = 0; 1060 } 1061 1062 static void 1063 wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 1064 { 1065 int i; 1066 1067 wpi_dma_contig_free(&ring->desc_dma); 1068 1069 for (i = 0; i < WPI_RX_RING_COUNT; i++) 1070 if (ring->data[i].m != NULL) 1071 m_freem(ring->data[i].m); 1072 } 1073 1074 static int 1075 wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int count, 1076 int qid) 1077 { 1078 struct wpi_tx_data *data; 1079 int i, error; 1080 1081 ring->qid = qid; 1082 ring->count = count; 1083 ring->queued = 0; 1084 ring->cur = 0; 1085 ring->data = NULL; 1086 1087 error = wpi_dma_contig_alloc(sc, &ring->desc_dma, 1088 (void **)&ring->desc, count * sizeof (struct wpi_tx_desc), 1089 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 1090 1091 if (error != 0) { 1092 device_printf(sc->sc_dev, "could not allocate tx dma memory\n"); 1093 goto fail; 1094 } 1095 1096 /* update shared page with ring's base address */ 1097 sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr); 1098 1099 error = wpi_dma_contig_alloc(sc, &ring->cmd_dma, (void **)&ring->cmd, 1100 count * sizeof (struct wpi_tx_cmd), WPI_RING_DMA_ALIGN, 1101 BUS_DMA_NOWAIT); 1102 1103 if (error != 0) { 1104 device_printf(sc->sc_dev, 1105 "could not allocate tx command DMA memory\n"); 1106 goto fail; 1107 } 1108 1109 ring->data = kmalloc(count * sizeof (struct wpi_tx_data), M_DEVBUF, 1110 M_INTWAIT | M_ZERO); 1111 if (ring->data == NULL) { 1112 device_printf(sc->sc_dev, 1113 "could not allocate tx data slots\n"); 1114 goto fail; 1115 } 1116 1117 error = bus_dma_tag_create(ring->data_dmat, 1, 0, 1118 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MJUMPAGESIZE, 1119 WPI_MAX_SCATTER - 1, MJUMPAGESIZE, BUS_DMA_NOWAIT, 1120 &ring->data_dmat); 1121 if (error != 0) { 1122 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 1123 goto fail; 1124 } 1125 1126 for (i = 0; i < count; i++) { 1127 data = &ring->data[i]; 1128 1129 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 1130 if (error != 0) { 1131 device_printf(sc->sc_dev, 1132 "could not create tx buf DMA map\n"); 1133 goto fail; 1134 } 1135 bus_dmamap_sync(ring->data_dmat, data->map, 1136 BUS_DMASYNC_PREWRITE); 1137 } 1138 1139 return 0; 1140 1141 fail: 1142 wpi_free_tx_ring(sc, ring); 1143 return error; 1144 } 1145 1146 static void 1147 wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 1148 { 1149 struct wpi_tx_data *data; 1150 int i, ntries; 1151 1152 wpi_mem_lock(sc); 1153 1154 WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0); 1155 for (ntries = 0; ntries < 100; ntries++) { 1156 if (WPI_READ(sc, WPI_TX_STATUS) & WPI_TX_IDLE(ring->qid)) 1157 break; 1158 DELAY(10); 1159 } 1160 #ifdef WPI_DEBUG 1161 if (ntries == 100 && wpi_debug > 0) 1162 device_printf(sc->sc_dev, "timeout resetting Tx ring %d\n", 1163 ring->qid); 1164 #endif 1165 wpi_mem_unlock(sc); 1166 1167 for (i = 0; i < ring->count; i++) { 1168 data = &ring->data[i]; 1169 1170 if (data->m != NULL) { 1171 bus_dmamap_unload(ring->data_dmat, data->map); 1172 m_freem(data->m); 1173 data->m = NULL; 1174 } 1175 } 1176 1177 ring->queued = 0; 1178 ring->cur = 0; 1179 } 1180 1181 static void 1182 wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 1183 { 1184 struct wpi_tx_data *data; 1185 int i; 1186 1187 wpi_dma_contig_free(&ring->desc_dma); 1188 wpi_dma_contig_free(&ring->cmd_dma); 1189 1190 if (ring->data != NULL) { 1191 for (i = 0; i < ring->count; i++) { 1192 data = &ring->data[i]; 1193 1194 if (data->m != NULL) { 1195 bus_dmamap_sync(ring->data_dmat, data->map, 1196 BUS_DMASYNC_POSTWRITE); 1197 bus_dmamap_unload(ring->data_dmat, data->map); 1198 m_freem(data->m); 1199 data->m = NULL; 1200 } 1201 } 1202 kfree(ring->data, M_DEVBUF); 1203 } 1204 1205 if (ring->data_dmat != NULL) 1206 bus_dma_tag_destroy(ring->data_dmat); 1207 } 1208 1209 static int 1210 wpi_shutdown(device_t dev) 1211 { 1212 struct wpi_softc *sc; 1213 1214 wlan_serialize_enter(); 1215 sc = device_get_softc(dev); 1216 wpi_stop_locked(sc); 1217 wpi_unload_firmware(sc); 1218 wlan_serialize_exit(); 1219 1220 return 0; 1221 } 1222 1223 static int 1224 wpi_suspend(device_t dev) 1225 { 1226 struct wpi_softc *sc; 1227 1228 wlan_serialize_enter(); 1229 sc = device_get_softc(dev); 1230 wpi_stop(sc); 1231 wlan_serialize_exit(); 1232 return 0; 1233 } 1234 1235 static int 1236 wpi_resume(device_t dev) 1237 { 1238 struct wpi_softc *sc; 1239 struct ifnet *ifp; 1240 1241 wlan_serialize_enter(); 1242 sc = device_get_softc(dev); 1243 ifp = sc->sc_ifp; 1244 pci_write_config(dev, 0x41, 0, 1); 1245 1246 if (ifp->if_flags & IFF_UP) { 1247 wpi_init(ifp->if_softc); 1248 if (ifp->if_flags & IFF_RUNNING) 1249 if_devstart(ifp); 1250 } 1251 wlan_serialize_exit(); 1252 return 0; 1253 } 1254 1255 /* ARGSUSED */ 1256 static struct ieee80211_node * 1257 wpi_node_alloc(struct ieee80211vap *vap __unused, 1258 const uint8_t mac[IEEE80211_ADDR_LEN] __unused) 1259 { 1260 struct wpi_node *wn; 1261 1262 wn = kmalloc(sizeof (struct wpi_node), M_80211_NODE, M_INTWAIT | M_ZERO); 1263 1264 return &wn->ni; 1265 } 1266 1267 /** 1268 * Called by net80211 when ever there is a change to 80211 state machine 1269 */ 1270 static int 1271 wpi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 1272 { 1273 struct wpi_vap *wvp = WPI_VAP(vap); 1274 struct ieee80211com *ic = vap->iv_ic; 1275 struct ifnet *ifp = ic->ic_ifp; 1276 struct wpi_softc *sc = ifp->if_softc; 1277 int error; 1278 1279 DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__, 1280 ieee80211_state_name[vap->iv_state], 1281 ieee80211_state_name[nstate], sc->flags)); 1282 1283 if (nstate == IEEE80211_S_AUTH) { 1284 /* The node must be registered in the firmware before auth */ 1285 error = wpi_auth(sc, vap); 1286 if (error != 0) { 1287 device_printf(sc->sc_dev, 1288 "%s: could not move to auth state, error %d\n", 1289 __func__, error); 1290 } 1291 } 1292 if (nstate == IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_RUN) { 1293 error = wpi_run(sc, vap); 1294 if (error != 0) { 1295 device_printf(sc->sc_dev, 1296 "%s: could not move to run state, error %d\n", 1297 __func__, error); 1298 } 1299 } 1300 if (nstate == IEEE80211_S_RUN) { 1301 /* RUN -> RUN transition; just restart the timers */ 1302 wpi_calib_timeout_callout(sc); 1303 /* XXX split out rate control timer */ 1304 } 1305 return wvp->newstate(vap, nstate, arg); 1306 } 1307 1308 /* 1309 * Grab exclusive access to NIC memory. 1310 */ 1311 static void 1312 wpi_mem_lock(struct wpi_softc *sc) 1313 { 1314 int ntries; 1315 uint32_t tmp; 1316 1317 tmp = WPI_READ(sc, WPI_GPIO_CTL); 1318 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC); 1319 1320 /* spin until we actually get the lock */ 1321 for (ntries = 0; ntries < 100; ntries++) { 1322 if ((WPI_READ(sc, WPI_GPIO_CTL) & 1323 (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK) 1324 break; 1325 DELAY(10); 1326 } 1327 if (ntries == 100) 1328 device_printf(sc->sc_dev, "could not lock memory\n"); 1329 } 1330 1331 /* 1332 * Release lock on NIC memory. 1333 */ 1334 static void 1335 wpi_mem_unlock(struct wpi_softc *sc) 1336 { 1337 uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL); 1338 WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC); 1339 } 1340 1341 static uint32_t 1342 wpi_mem_read(struct wpi_softc *sc, uint16_t addr) 1343 { 1344 WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr); 1345 return WPI_READ(sc, WPI_READ_MEM_DATA); 1346 } 1347 1348 static void 1349 wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data) 1350 { 1351 WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr); 1352 WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data); 1353 } 1354 1355 static void 1356 wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr, 1357 const uint32_t *data, int wlen) 1358 { 1359 for (; wlen > 0; wlen--, data++, addr+=4) 1360 wpi_mem_write(sc, addr, *data); 1361 } 1362 1363 /* 1364 * Read data from the EEPROM. We access EEPROM through the MAC instead of 1365 * using the traditional bit-bang method. Data is read up until len bytes have 1366 * been obtained. 1367 */ 1368 static uint16_t 1369 wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len) 1370 { 1371 int ntries; 1372 uint32_t val; 1373 uint8_t *out = data; 1374 1375 wpi_mem_lock(sc); 1376 1377 for (; len > 0; len -= 2, addr++) { 1378 WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2); 1379 1380 for (ntries = 0; ntries < 10; ntries++) { 1381 if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) & WPI_EEPROM_READY) 1382 break; 1383 DELAY(5); 1384 } 1385 1386 if (ntries == 10) { 1387 device_printf(sc->sc_dev, "could not read EEPROM\n"); 1388 return ETIMEDOUT; 1389 } 1390 1391 *out++= val >> 16; 1392 if (len > 1) 1393 *out ++= val >> 24; 1394 } 1395 1396 wpi_mem_unlock(sc); 1397 1398 return 0; 1399 } 1400 1401 /* 1402 * The firmware text and data segments are transferred to the NIC using DMA. 1403 * The driver just copies the firmware into DMA-safe memory and tells the NIC 1404 * where to find it. Once the NIC has copied the firmware into its internal 1405 * memory, we can free our local copy in the driver. 1406 */ 1407 static int 1408 wpi_load_microcode(struct wpi_softc *sc, const uint8_t *fw, int size) 1409 { 1410 int error, ntries; 1411 1412 DPRINTFN(WPI_DEBUG_HW,("Loading microcode size 0x%x\n", size)); 1413 1414 size /= sizeof(uint32_t); 1415 1416 wpi_mem_lock(sc); 1417 1418 wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE, 1419 (const uint32_t *)fw, size); 1420 1421 wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0); 1422 wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT); 1423 wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size); 1424 1425 /* run microcode */ 1426 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN); 1427 1428 /* wait while the adapter is busy copying the firmware */ 1429 for (error = 0, ntries = 0; ntries < 1000; ntries++) { 1430 uint32_t status = WPI_READ(sc, WPI_TX_STATUS); 1431 DPRINTFN(WPI_DEBUG_HW, 1432 ("firmware status=0x%x, val=0x%x, result=0x%x\n", status, 1433 WPI_TX_IDLE(6), status & WPI_TX_IDLE(6))); 1434 if (status & WPI_TX_IDLE(6)) { 1435 DPRINTFN(WPI_DEBUG_HW, 1436 ("Status Match! - ntries = %d\n", ntries)); 1437 break; 1438 } 1439 DELAY(10); 1440 } 1441 if (ntries == 1000) { 1442 device_printf(sc->sc_dev, "timeout transferring firmware\n"); 1443 error = ETIMEDOUT; 1444 } 1445 1446 /* start the microcode executing */ 1447 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE); 1448 1449 wpi_mem_unlock(sc); 1450 1451 return (error); 1452 } 1453 1454 static void 1455 wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, 1456 struct wpi_rx_data *data) 1457 { 1458 struct ifnet *ifp = sc->sc_ifp; 1459 struct ieee80211com *ic = ifp->if_l2com; 1460 struct wpi_rx_ring *ring = &sc->rxq; 1461 struct wpi_rx_stat *stat; 1462 struct wpi_rx_head *head; 1463 struct wpi_rx_tail *tail; 1464 struct ieee80211_node *ni; 1465 struct mbuf *m, *mnew; 1466 bus_addr_t paddr; 1467 int error; 1468 1469 stat = (struct wpi_rx_stat *)(desc + 1); 1470 1471 if (stat->len > WPI_STAT_MAXLEN) { 1472 device_printf(sc->sc_dev, "invalid rx statistic header\n"); 1473 IFNET_STAT_INC(ifp, ierrors, 1); 1474 return; 1475 } 1476 1477 head = (struct wpi_rx_head *)((caddr_t)(stat + 1) + stat->len); 1478 tail = (struct wpi_rx_tail *)((caddr_t)(head + 1) + le16toh(head->len)); 1479 1480 DPRINTFN(WPI_DEBUG_RX, ("rx intr: idx=%d len=%d stat len=%d rssi=%d " 1481 "rate=%x chan=%d tstamp=%ju\n", ring->cur, le32toh(desc->len), 1482 le16toh(head->len), (int8_t)stat->rssi, head->rate, head->chan, 1483 (uintmax_t)le64toh(tail->tstamp))); 1484 1485 /* discard Rx frames with bad CRC early */ 1486 if ((le32toh(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) { 1487 DPRINTFN(WPI_DEBUG_RX, ("%s: rx flags error %x\n", __func__, 1488 le32toh(tail->flags))); 1489 IFNET_STAT_INC(ifp, ierrors, 1); 1490 return; 1491 } 1492 if (le16toh(head->len) < sizeof (struct ieee80211_frame)) { 1493 DPRINTFN(WPI_DEBUG_RX, ("%s: frame too short: %d\n", __func__, 1494 le16toh(head->len))); 1495 IFNET_STAT_INC(ifp, ierrors, 1); 1496 return; 1497 } 1498 1499 /* XXX don't need mbuf, just dma buffer */ 1500 mnew = m_getjcl(MB_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE); 1501 if (mnew == NULL) { 1502 DPRINTFN(WPI_DEBUG_RX, ("%s: no mbuf to restock ring\n", 1503 __func__)); 1504 IFNET_STAT_INC(ifp, ierrors, 1); 1505 return; 1506 } 1507 error = bus_dmamap_load(ring->data_dmat, data->map, 1508 mtod(mnew, caddr_t), MJUMPAGESIZE, 1509 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT); 1510 if (error != 0 && error != EFBIG) { 1511 device_printf(sc->sc_dev, 1512 "%s: bus_dmamap_load failed, error %d\n", __func__, error); 1513 m_freem(mnew); 1514 IFNET_STAT_INC(ifp, ierrors, 1); 1515 return; 1516 } 1517 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1518 1519 /* finalize mbuf and swap in new one */ 1520 m = data->m; 1521 m->m_pkthdr.rcvif = ifp; 1522 m->m_data = (caddr_t)(head + 1); 1523 m->m_pkthdr.len = m->m_len = le16toh(head->len); 1524 1525 data->m = mnew; 1526 /* update Rx descriptor */ 1527 ring->desc[ring->cur] = htole32(paddr); 1528 1529 if (ieee80211_radiotap_active(ic)) { 1530 struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap; 1531 1532 tap->wr_flags = 0; 1533 tap->wr_chan_freq = 1534 htole16(ic->ic_channels[head->chan].ic_freq); 1535 tap->wr_chan_flags = 1536 htole16(ic->ic_channels[head->chan].ic_flags); 1537 tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET); 1538 tap->wr_dbm_antnoise = (int8_t)le16toh(stat->noise); 1539 tap->wr_tsft = tail->tstamp; 1540 tap->wr_antenna = (le16toh(head->flags) >> 4) & 0xf; 1541 switch (head->rate) { 1542 /* CCK rates */ 1543 case 10: tap->wr_rate = 2; break; 1544 case 20: tap->wr_rate = 4; break; 1545 case 55: tap->wr_rate = 11; break; 1546 case 110: tap->wr_rate = 22; break; 1547 /* OFDM rates */ 1548 case 0xd: tap->wr_rate = 12; break; 1549 case 0xf: tap->wr_rate = 18; break; 1550 case 0x5: tap->wr_rate = 24; break; 1551 case 0x7: tap->wr_rate = 36; break; 1552 case 0x9: tap->wr_rate = 48; break; 1553 case 0xb: tap->wr_rate = 72; break; 1554 case 0x1: tap->wr_rate = 96; break; 1555 case 0x3: tap->wr_rate = 108; break; 1556 /* unknown rate: should not happen */ 1557 default: tap->wr_rate = 0; 1558 } 1559 if (le16toh(head->flags) & 0x4) 1560 tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; 1561 } 1562 1563 ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *)); 1564 if (ni != NULL) { 1565 (void) ieee80211_input(ni, m, stat->rssi, 0); 1566 ieee80211_free_node(ni); 1567 } else 1568 (void) ieee80211_input_all(ic, m, stat->rssi, 0); 1569 } 1570 1571 static void 1572 wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1573 { 1574 struct ifnet *ifp = sc->sc_ifp; 1575 struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3]; 1576 struct wpi_tx_data *txdata = &ring->data[desc->idx]; 1577 struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1); 1578 struct ieee80211_node *ni = txdata->ni; 1579 struct ieee80211vap *vap = ni->ni_vap; 1580 int retrycnt = 0; 1581 1582 DPRINTFN(WPI_DEBUG_TX, ("tx done: qid=%d idx=%d retries=%d nkill=%d " 1583 "rate=%x duration=%d status=%x\n", desc->qid, desc->idx, 1584 stat->ntries, stat->nkill, stat->rate, le32toh(stat->duration), 1585 le32toh(stat->status))); 1586 1587 /* 1588 * Update rate control statistics for the node. 1589 * XXX we should not count mgmt frames since they're always sent at 1590 * the lowest available bit-rate. 1591 * XXX frames w/o ACK shouldn't be used either 1592 */ 1593 if (stat->ntries > 0) { 1594 DPRINTFN(WPI_DEBUG_TX, ("%d retries\n", stat->ntries)); 1595 retrycnt = 1; 1596 } 1597 ieee80211_ratectl_tx_complete(vap, ni, IEEE80211_RATECTL_TX_SUCCESS, 1598 &retrycnt, NULL); 1599 1600 /* XXX oerrors should only count errors !maxtries */ 1601 if ((le32toh(stat->status) & 0xff) != 1) 1602 IFNET_STAT_INC(ifp, oerrors, 1); 1603 else 1604 IFNET_STAT_INC(ifp, opackets, 1); 1605 1606 bus_dmamap_sync(ring->data_dmat, txdata->map, BUS_DMASYNC_POSTWRITE); 1607 bus_dmamap_unload(ring->data_dmat, txdata->map); 1608 /* XXX handle M_TXCB? */ 1609 m_freem(txdata->m); 1610 txdata->m = NULL; 1611 ieee80211_free_node(txdata->ni); 1612 txdata->ni = NULL; 1613 1614 ring->queued--; 1615 1616 sc->sc_tx_timer = 0; 1617 ifq_clr_oactive(&ifp->if_snd); 1618 wpi_start_locked(ifp); 1619 } 1620 1621 static void 1622 wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1623 { 1624 struct wpi_tx_ring *ring = &sc->cmdq; 1625 struct wpi_tx_data *data; 1626 1627 DPRINTFN(WPI_DEBUG_CMD, ("cmd notification qid=%x idx=%d flags=%x " 1628 "type=%s len=%d\n", desc->qid, desc->idx, 1629 desc->flags, wpi_cmd_str(desc->type), 1630 le32toh(desc->len))); 1631 1632 if ((desc->qid & 7) != 4) 1633 return; /* not a command ack */ 1634 1635 data = &ring->data[desc->idx]; 1636 1637 /* if the command was mapped in a mbuf, free it */ 1638 if (data->m != NULL) { 1639 bus_dmamap_unload(ring->data_dmat, data->map); 1640 m_freem(data->m); 1641 data->m = NULL; 1642 } 1643 1644 sc->flags &= ~WPI_FLAG_BUSY; 1645 wakeup(&ring->cmd[desc->idx]); 1646 } 1647 1648 static void 1649 wpi_notif_intr(struct wpi_softc *sc) 1650 { 1651 struct ifnet *ifp = sc->sc_ifp; 1652 struct ieee80211com *ic = ifp->if_l2com; 1653 struct wpi_rx_desc *desc; 1654 struct wpi_rx_data *data; 1655 uint32_t hw; 1656 1657 hw = le32toh(sc->shared->next); 1658 while (sc->rxq.cur != hw) { 1659 data = &sc->rxq.data[sc->rxq.cur]; 1660 desc = (void *)data->m->m_ext.ext_buf; 1661 1662 DPRINTFN(WPI_DEBUG_NOTIFY, 1663 ("notify qid=%x idx=%d flags=%x type=%d len=%d\n", 1664 desc->qid, 1665 desc->idx, 1666 desc->flags, 1667 desc->type, 1668 le32toh(desc->len))); 1669 1670 if (!(desc->qid & 0x80)) /* reply to a command */ 1671 wpi_cmd_intr(sc, desc); 1672 1673 switch (desc->type) { 1674 case WPI_RX_DONE: 1675 /* a 802.11 frame was received */ 1676 wpi_rx_intr(sc, desc, data); 1677 break; 1678 1679 case WPI_TX_DONE: 1680 /* a 802.11 frame has been transmitted */ 1681 wpi_tx_intr(sc, desc); 1682 break; 1683 1684 case WPI_UC_READY: 1685 { 1686 struct wpi_ucode_info *uc = 1687 (struct wpi_ucode_info *)(desc + 1); 1688 1689 /* the microcontroller is ready */ 1690 DPRINTF(("microcode alive notification version %x " 1691 "alive %x\n", le32toh(uc->version), 1692 le32toh(uc->valid))); 1693 1694 if (le32toh(uc->valid) != 1) { 1695 device_printf(sc->sc_dev, 1696 "microcontroller initialization failed\n"); 1697 wpi_stop_locked(sc); 1698 } 1699 break; 1700 } 1701 case WPI_STATE_CHANGED: 1702 { 1703 uint32_t *status = (uint32_t *)(desc + 1); 1704 1705 /* enabled/disabled notification */ 1706 DPRINTF(("state changed to %x\n", le32toh(*status))); 1707 1708 if (le32toh(*status) & 1) { 1709 device_printf(sc->sc_dev, 1710 "Radio transmitter is switched off\n"); 1711 sc->flags |= WPI_FLAG_HW_RADIO_OFF; 1712 ifp->if_flags &= ~IFF_RUNNING; 1713 /* Disable firmware commands */ 1714 WPI_WRITE(sc, WPI_UCODE_SET, WPI_DISABLE_CMD); 1715 } 1716 break; 1717 } 1718 case WPI_START_SCAN: 1719 { 1720 #ifdef WPI_DEBUG 1721 struct wpi_start_scan *scan = 1722 (struct wpi_start_scan *)(desc + 1); 1723 #endif 1724 1725 DPRINTFN(WPI_DEBUG_SCANNING, 1726 ("scanning channel %d status %x\n", 1727 scan->chan, le32toh(scan->status))); 1728 break; 1729 } 1730 case WPI_STOP_SCAN: 1731 { 1732 #ifdef WPI_DEBUG 1733 struct wpi_stop_scan *scan = 1734 (struct wpi_stop_scan *)(desc + 1); 1735 #endif 1736 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 1737 1738 DPRINTFN(WPI_DEBUG_SCANNING, 1739 ("scan finished nchan=%d status=%d chan=%d\n", 1740 scan->nchan, scan->status, scan->chan)); 1741 1742 sc->sc_scan_timer = 0; 1743 ieee80211_scan_next(vap); 1744 break; 1745 } 1746 case WPI_MISSED_BEACON: 1747 { 1748 struct wpi_missed_beacon *beacon = 1749 (struct wpi_missed_beacon *)(desc + 1); 1750 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 1751 1752 if (le32toh(beacon->consecutive) >= 1753 vap->iv_bmissthreshold) { 1754 DPRINTF(("Beacon miss: %u >= %u\n", 1755 le32toh(beacon->consecutive), 1756 vap->iv_bmissthreshold)); 1757 ieee80211_beacon_miss(ic); 1758 } 1759 break; 1760 } 1761 } 1762 1763 sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT; 1764 } 1765 1766 /* tell the firmware what we have processed */ 1767 hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1; 1768 WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7); 1769 } 1770 1771 static void 1772 wpi_intr(void *arg) 1773 { 1774 struct wpi_softc *sc = arg; 1775 uint32_t r; 1776 1777 r = WPI_READ(sc, WPI_INTR); 1778 if (r == 0 || r == 0xffffffff) { 1779 return; 1780 } 1781 1782 /* disable interrupts */ 1783 WPI_WRITE(sc, WPI_MASK, 0); 1784 /* ack interrupts */ 1785 WPI_WRITE(sc, WPI_INTR, r); 1786 1787 if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) { 1788 struct ifnet *ifp = sc->sc_ifp; 1789 struct ieee80211com *ic = ifp->if_l2com; 1790 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 1791 1792 device_printf(sc->sc_dev, "fatal firmware error\n"); 1793 DPRINTFN(6,("(%s)\n", (r & WPI_SW_ERROR) ? "(Software Error)" : 1794 "(Hardware Error)")); 1795 if (vap != NULL) 1796 ieee80211_cancel_scan(vap); 1797 ieee80211_runtask(ic, &sc->sc_restarttask); 1798 sc->flags &= ~WPI_FLAG_BUSY; 1799 return; 1800 } 1801 1802 if (r & WPI_RX_INTR) 1803 wpi_notif_intr(sc); 1804 1805 if (r & WPI_ALIVE_INTR) /* firmware initialized */ 1806 wakeup(sc); 1807 1808 /* re-enable interrupts */ 1809 if (sc->sc_ifp->if_flags & IFF_UP) 1810 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 1811 1812 } 1813 1814 static uint8_t 1815 wpi_plcp_signal(int rate) 1816 { 1817 switch (rate) { 1818 /* CCK rates (returned values are device-dependent) */ 1819 case 2: return 10; 1820 case 4: return 20; 1821 case 11: return 55; 1822 case 22: return 110; 1823 1824 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1825 /* R1-R4 (ral/ural is R4-R1) */ 1826 case 12: return 0xd; 1827 case 18: return 0xf; 1828 case 24: return 0x5; 1829 case 36: return 0x7; 1830 case 48: return 0x9; 1831 case 72: return 0xb; 1832 case 96: return 0x1; 1833 case 108: return 0x3; 1834 1835 /* unsupported rates (should not get there) */ 1836 default: return 0; 1837 } 1838 } 1839 1840 /* quickly determine if a given rate is CCK or OFDM */ 1841 #define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1842 1843 /* 1844 * Construct the data packet for a transmit buffer and acutally put 1845 * the buffer onto the transmit ring, kicking the card to process the 1846 * the buffer. 1847 */ 1848 static int 1849 wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, 1850 int ac) 1851 { 1852 struct ieee80211vap *vap = ni->ni_vap; 1853 struct ifnet *ifp = sc->sc_ifp; 1854 struct ieee80211com *ic = ifp->if_l2com; 1855 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1856 struct wpi_tx_ring *ring = &sc->txq[ac]; 1857 struct wpi_tx_desc *desc; 1858 struct wpi_tx_data *data; 1859 struct wpi_tx_cmd *cmd; 1860 struct wpi_cmd_data *tx; 1861 struct ieee80211_frame *wh; 1862 const struct ieee80211_txparam *tp; 1863 struct ieee80211_key *k; 1864 struct mbuf *mnew; 1865 int i, error, nsegs, rate, hdrlen, ismcast; 1866 bus_dma_segment_t segs[WPI_MAX_SCATTER]; 1867 1868 desc = &ring->desc[ring->cur]; 1869 data = &ring->data[ring->cur]; 1870 1871 wh = mtod(m0, struct ieee80211_frame *); 1872 1873 hdrlen = ieee80211_hdrsize(wh); 1874 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1875 1876 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1877 k = ieee80211_crypto_encap(ni, m0); 1878 if (k == NULL) { 1879 m_freem(m0); 1880 return ENOBUFS; 1881 } 1882 /* packet header may have moved, reset our local pointer */ 1883 wh = mtod(m0, struct ieee80211_frame *); 1884 } 1885 1886 cmd = &ring->cmd[ring->cur]; 1887 cmd->code = WPI_CMD_TX_DATA; 1888 cmd->flags = 0; 1889 cmd->qid = ring->qid; 1890 cmd->idx = ring->cur; 1891 1892 tx = (struct wpi_cmd_data *)cmd->data; 1893 tx->flags = htole32(WPI_TX_AUTO_SEQ); 1894 tx->timeout = htole16(0); 1895 tx->ofdm_mask = 0xff; 1896 tx->cck_mask = 0x0f; 1897 tx->lifetime = htole32(WPI_LIFETIME_INFINITE); 1898 tx->id = ismcast ? WPI_ID_BROADCAST : WPI_ID_BSS; 1899 tx->len = htole16(m0->m_pkthdr.len); 1900 1901 if (!ismcast) { 1902 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0 || 1903 !cap->cap_wmeParams[ac].wmep_noackPolicy) 1904 tx->flags |= htole32(WPI_TX_NEED_ACK); 1905 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold) { 1906 tx->flags |= htole32(WPI_TX_NEED_RTS|WPI_TX_FULL_TXOP); 1907 tx->rts_ntries = 7; 1908 } 1909 } 1910 /* pick a rate */ 1911 tp = &vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)]; 1912 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_MGT) { 1913 uint8_t subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1914 /* tell h/w to set timestamp in probe responses */ 1915 if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1916 tx->flags |= htole32(WPI_TX_INSERT_TSTAMP); 1917 if (subtype == IEEE80211_FC0_SUBTYPE_ASSOC_REQ || 1918 subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) 1919 tx->timeout = htole16(3); 1920 else 1921 tx->timeout = htole16(2); 1922 rate = tp->mgmtrate; 1923 } else if (ismcast) { 1924 rate = tp->mcastrate; 1925 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) { 1926 rate = tp->ucastrate; 1927 } else { 1928 (void) ieee80211_ratectl_rate(ni, NULL, 0); 1929 rate = ni->ni_txrate; 1930 } 1931 tx->rate = wpi_plcp_signal(rate); 1932 1933 /* be very persistant at sending frames out */ 1934 #if 0 1935 tx->data_ntries = tp->maxretry; 1936 #else 1937 tx->data_ntries = 30; /* XXX way too high */ 1938 #endif 1939 1940 if (ieee80211_radiotap_active_vap(vap)) { 1941 struct wpi_tx_radiotap_header *tap = &sc->sc_txtap; 1942 tap->wt_flags = 0; 1943 tap->wt_rate = rate; 1944 tap->wt_hwqueue = ac; 1945 if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1946 tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1947 1948 ieee80211_radiotap_tx(vap, m0); 1949 } 1950 1951 /* save and trim IEEE802.11 header */ 1952 m_copydata(m0, 0, hdrlen, (caddr_t)&tx->wh); 1953 m_adj(m0, hdrlen); 1954 1955 error = bus_dmamap_load_mbuf_segment(ring->data_dmat, data->map, m0, segs, 1956 1, &nsegs, BUS_DMA_NOWAIT); 1957 if (error != 0 && error != EFBIG) { 1958 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1959 error); 1960 m_freem(m0); 1961 return error; 1962 } 1963 if (error != 0) { 1964 /* XXX use m_collapse */ 1965 mnew = m_defrag(m0, MB_DONTWAIT); 1966 if (mnew == NULL) { 1967 device_printf(sc->sc_dev, 1968 "could not defragment mbuf\n"); 1969 m_freem(m0); 1970 return ENOBUFS; 1971 } 1972 m0 = mnew; 1973 1974 error = bus_dmamap_load_mbuf_segment(ring->data_dmat, data->map, 1975 m0, segs, 1, &nsegs, BUS_DMA_NOWAIT); 1976 if (error != 0) { 1977 device_printf(sc->sc_dev, 1978 "could not map mbuf (error %d)\n", error); 1979 m_freem(m0); 1980 return error; 1981 } 1982 } 1983 1984 data->m = m0; 1985 data->ni = ni; 1986 1987 DPRINTFN(WPI_DEBUG_TX, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n", 1988 ring->qid, ring->cur, m0->m_pkthdr.len, nsegs)); 1989 1990 /* first scatter/gather segment is used by the tx data command */ 1991 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 1992 (1 + nsegs) << 24); 1993 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 1994 ring->cur * sizeof (struct wpi_tx_cmd)); 1995 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data)); 1996 for (i = 1; i <= nsegs; i++) { 1997 desc->segs[i].addr = htole32(segs[i - 1].ds_addr); 1998 desc->segs[i].len = htole32(segs[i - 1].ds_len); 1999 } 2000 2001 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 2002 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 2003 BUS_DMASYNC_PREWRITE); 2004 2005 ring->queued++; 2006 2007 /* kick ring */ 2008 ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT; 2009 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2010 2011 return 0; 2012 } 2013 2014 /** 2015 * Process data waiting to be sent on the IFNET output queue 2016 */ 2017 static void 2018 wpi_start(struct ifnet *ifp, struct ifaltq_subque *ifsq) 2019 { 2020 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq); 2021 wpi_start_locked(ifp); 2022 } 2023 2024 static void 2025 wpi_start_locked(struct ifnet *ifp) 2026 { 2027 struct wpi_softc *sc = ifp->if_softc; 2028 struct ieee80211_node *ni; 2029 struct mbuf *m; 2030 int ac; 2031 2032 if ((ifp->if_flags & IFF_RUNNING) == 0) { 2033 ifq_purge(&ifp->if_snd); 2034 return; 2035 } 2036 2037 for (;;) { 2038 m = ifq_dequeue(&ifp->if_snd); 2039 if (m == NULL) 2040 break; 2041 ac = M_WME_GETAC(m); 2042 if (sc->txq[ac].queued > sc->txq[ac].count - 8) { 2043 /* there is no place left in this ring */ 2044 /* 2045 * XXX: we CANNOT do it this way. If something 2046 * is prepended already, this is going to blow. 2047 */ 2048 ifq_set_oactive(&ifp->if_snd); 2049 ifq_prepend(&ifp->if_snd, m); 2050 break; 2051 } 2052 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 2053 if (wpi_tx_data(sc, m, ni, ac) != 0) { 2054 ieee80211_free_node(ni); 2055 IFNET_STAT_INC(ifp, oerrors, 1); 2056 break; 2057 } 2058 sc->sc_tx_timer = 5; 2059 } 2060 } 2061 2062 static int 2063 wpi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2064 const struct ieee80211_bpf_params *params) 2065 { 2066 struct ieee80211com *ic = ni->ni_ic; 2067 struct ifnet *ifp = ic->ic_ifp; 2068 struct wpi_softc *sc = ifp->if_softc; 2069 2070 /* prevent management frames from being sent if we're not ready */ 2071 if (!(ifp->if_flags & IFF_RUNNING)) { 2072 m_freem(m); 2073 ieee80211_free_node(ni); 2074 return ENETDOWN; 2075 } 2076 2077 /* management frames go into ring 0 */ 2078 if (sc->txq[0].queued > sc->txq[0].count - 8) { 2079 ifq_set_oactive(&ifp->if_snd); 2080 m_freem(m); 2081 ieee80211_free_node(ni); 2082 return ENOBUFS; /* XXX */ 2083 } 2084 2085 IFNET_STAT_INC(ifp, opackets, 1); 2086 if (wpi_tx_data(sc, m, ni, 0) != 0) 2087 goto bad; 2088 sc->sc_tx_timer = 5; 2089 callout_reset(&sc->watchdog_to_callout, hz, wpi_watchdog_callout, sc); 2090 2091 return 0; 2092 bad: 2093 IFNET_STAT_INC(ifp, oerrors, 1); 2094 ieee80211_free_node(ni); 2095 return EIO; /* XXX */ 2096 } 2097 2098 static int 2099 wpi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cred) 2100 { 2101 struct wpi_softc *sc = ifp->if_softc; 2102 struct ieee80211com *ic = ifp->if_l2com; 2103 struct ifreq *ifr = (struct ifreq *) data; 2104 int error = 0, startall = 0; 2105 2106 switch (cmd) { 2107 case SIOCSIFFLAGS: 2108 if ((ifp->if_flags & IFF_UP)) { 2109 if (!(ifp->if_flags & IFF_RUNNING)) { 2110 wpi_init_locked(sc, 0); 2111 startall = 1; 2112 } 2113 } else if ((ifp->if_flags & IFF_RUNNING) || 2114 (sc->flags & WPI_FLAG_HW_RADIO_OFF)) 2115 wpi_stop_locked(sc); 2116 if (startall) 2117 ieee80211_start_all(ic); 2118 break; 2119 case SIOCGIFMEDIA: 2120 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd); 2121 break; 2122 case SIOCGIFADDR: 2123 error = ether_ioctl(ifp, cmd, data); 2124 break; 2125 default: 2126 error = EINVAL; 2127 break; 2128 } 2129 return error; 2130 } 2131 2132 /* 2133 * Extract various information from EEPROM. 2134 */ 2135 static void 2136 wpi_read_eeprom(struct wpi_softc *sc, uint8_t macaddr[IEEE80211_ADDR_LEN]) 2137 { 2138 int i; 2139 2140 /* read the hardware capabilities, revision and SKU type */ 2141 wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap,1); 2142 wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev,2); 2143 wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1); 2144 2145 /* read the regulatory domain */ 2146 wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, sc->domain, 4); 2147 2148 /* read in the hw MAC address */ 2149 wpi_read_prom_data(sc, WPI_EEPROM_MAC, macaddr, 6); 2150 2151 /* read the list of authorized channels */ 2152 for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++) 2153 wpi_read_eeprom_channels(sc,i); 2154 2155 /* read the power level calibration info for each group */ 2156 for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++) 2157 wpi_read_eeprom_group(sc,i); 2158 } 2159 2160 /* 2161 * Send a command to the firmware. 2162 */ 2163 static int 2164 wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async) 2165 { 2166 struct wpi_tx_ring *ring = &sc->cmdq; 2167 struct wpi_tx_desc *desc; 2168 struct wpi_tx_cmd *cmd; 2169 2170 #ifdef WPI_DEBUG 2171 if (!async) { 2172 wlan_assert_serialized(); 2173 } 2174 #endif 2175 2176 DPRINTFN(WPI_DEBUG_CMD,("wpi_cmd %d size %d async %d\n", code, size, 2177 async)); 2178 2179 if (sc->flags & WPI_FLAG_BUSY) { 2180 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n", 2181 __func__, code); 2182 return EAGAIN; 2183 } 2184 sc->flags|= WPI_FLAG_BUSY; 2185 2186 KASSERT(size <= sizeof cmd->data, ("command %d too large: %d bytes", 2187 code, size)); 2188 2189 desc = &ring->desc[ring->cur]; 2190 cmd = &ring->cmd[ring->cur]; 2191 2192 cmd->code = code; 2193 cmd->flags = 0; 2194 cmd->qid = ring->qid; 2195 cmd->idx = ring->cur; 2196 memcpy(cmd->data, buf, size); 2197 2198 desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24); 2199 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2200 ring->cur * sizeof (struct wpi_tx_cmd)); 2201 desc->segs[0].len = htole32(4 + size); 2202 2203 /* kick cmd ring */ 2204 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2205 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2206 2207 if (async) { 2208 sc->flags &= ~ WPI_FLAG_BUSY; 2209 return 0; 2210 } 2211 2212 return zsleep(cmd, &wlan_global_serializer, 0, "wpicmd", hz); 2213 } 2214 2215 static int 2216 wpi_wme_update(struct ieee80211com *ic) 2217 { 2218 #define WPI_EXP2(v) htole16((1 << (v)) - 1) 2219 #define WPI_USEC(v) htole16(IEEE80211_TXOP_TO_US(v)) 2220 struct wpi_softc *sc = ic->ic_ifp->if_softc; 2221 const struct wmeParams *wmep; 2222 struct wpi_wme_setup wme; 2223 int ac; 2224 2225 /* don't override default WME values if WME is not actually enabled */ 2226 if (!(ic->ic_flags & IEEE80211_F_WME)) 2227 return 0; 2228 2229 wme.flags = 0; 2230 for (ac = 0; ac < WME_NUM_AC; ac++) { 2231 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 2232 wme.ac[ac].aifsn = wmep->wmep_aifsn; 2233 wme.ac[ac].cwmin = WPI_EXP2(wmep->wmep_logcwmin); 2234 wme.ac[ac].cwmax = WPI_EXP2(wmep->wmep_logcwmax); 2235 wme.ac[ac].txop = WPI_USEC(wmep->wmep_txopLimit); 2236 2237 DPRINTF(("setting WME for queue %d aifsn=%d cwmin=%d cwmax=%d " 2238 "txop=%d\n", ac, wme.ac[ac].aifsn, wme.ac[ac].cwmin, 2239 wme.ac[ac].cwmax, wme.ac[ac].txop)); 2240 } 2241 return wpi_cmd(sc, WPI_CMD_SET_WME, &wme, sizeof wme, 1); 2242 #undef WPI_USEC 2243 #undef WPI_EXP2 2244 } 2245 2246 /* 2247 * Configure h/w multi-rate retries. 2248 */ 2249 static int 2250 wpi_mrr_setup(struct wpi_softc *sc) 2251 { 2252 struct ifnet *ifp = sc->sc_ifp; 2253 struct ieee80211com *ic = ifp->if_l2com; 2254 struct wpi_mrr_setup mrr; 2255 int i, error; 2256 2257 memset(&mrr, 0, sizeof (struct wpi_mrr_setup)); 2258 2259 /* CCK rates (not used with 802.11a) */ 2260 for (i = WPI_CCK1; i <= WPI_CCK11; i++) { 2261 mrr.rates[i].flags = 0; 2262 mrr.rates[i].signal = wpi_ridx_to_plcp[i]; 2263 /* fallback to the immediate lower CCK rate (if any) */ 2264 mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1; 2265 /* try one time at this rate before falling back to "next" */ 2266 mrr.rates[i].ntries = 1; 2267 } 2268 2269 /* OFDM rates (not used with 802.11b) */ 2270 for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) { 2271 mrr.rates[i].flags = 0; 2272 mrr.rates[i].signal = wpi_ridx_to_plcp[i]; 2273 /* fallback to the immediate lower OFDM rate (if any) */ 2274 /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */ 2275 mrr.rates[i].next = (i == WPI_OFDM6) ? 2276 ((ic->ic_curmode == IEEE80211_MODE_11A) ? 2277 WPI_OFDM6 : WPI_CCK2) : 2278 i - 1; 2279 /* try one time at this rate before falling back to "next" */ 2280 mrr.rates[i].ntries = 1; 2281 } 2282 2283 /* setup MRR for control frames */ 2284 mrr.which = htole32(WPI_MRR_CTL); 2285 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2286 if (error != 0) { 2287 device_printf(sc->sc_dev, 2288 "could not setup MRR for control frames\n"); 2289 return error; 2290 } 2291 2292 /* setup MRR for data frames */ 2293 mrr.which = htole32(WPI_MRR_DATA); 2294 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2295 if (error != 0) { 2296 device_printf(sc->sc_dev, 2297 "could not setup MRR for data frames\n"); 2298 return error; 2299 } 2300 2301 return 0; 2302 } 2303 2304 static void 2305 wpi_set_led(struct wpi_softc *sc, uint8_t which, uint8_t off, uint8_t on) 2306 { 2307 struct wpi_cmd_led led; 2308 2309 led.which = which; 2310 led.unit = htole32(100000); /* on/off in unit of 100ms */ 2311 led.off = off; 2312 led.on = on; 2313 2314 (void)wpi_cmd(sc, WPI_CMD_SET_LED, &led, sizeof led, 1); 2315 } 2316 2317 static void 2318 wpi_enable_tsf(struct wpi_softc *sc, struct ieee80211_node *ni) 2319 { 2320 struct wpi_cmd_tsf tsf; 2321 uint64_t val, mod; 2322 2323 memset(&tsf, 0, sizeof tsf); 2324 memcpy(&tsf.tstamp, ni->ni_tstamp.data, 8); 2325 tsf.bintval = htole16(ni->ni_intval); 2326 tsf.lintval = htole16(10); 2327 2328 /* compute remaining time until next beacon */ 2329 val = (uint64_t)ni->ni_intval * 1024; /* msec -> usec */ 2330 mod = le64toh(tsf.tstamp) % val; 2331 tsf.binitval = htole32((uint32_t)(val - mod)); 2332 2333 if (wpi_cmd(sc, WPI_CMD_TSF, &tsf, sizeof tsf, 1) != 0) 2334 device_printf(sc->sc_dev, "could not enable TSF\n"); 2335 } 2336 2337 #if 0 2338 /* 2339 * Build a beacon frame that the firmware will broadcast periodically in 2340 * IBSS or HostAP modes. 2341 */ 2342 static int 2343 wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni) 2344 { 2345 struct ifnet *ifp = sc->sc_ifp; 2346 struct ieee80211com *ic = ifp->if_l2com; 2347 struct wpi_tx_ring *ring = &sc->cmdq; 2348 struct wpi_tx_desc *desc; 2349 struct wpi_tx_data *data; 2350 struct wpi_tx_cmd *cmd; 2351 struct wpi_cmd_beacon *bcn; 2352 struct ieee80211_beacon_offsets bo; 2353 struct mbuf *m0; 2354 bus_addr_t physaddr; 2355 int error; 2356 2357 desc = &ring->desc[ring->cur]; 2358 data = &ring->data[ring->cur]; 2359 2360 m0 = ieee80211_beacon_alloc(ic, ni, &bo); 2361 if (m0 == NULL) { 2362 device_printf(sc->sc_dev, "could not allocate beacon frame\n"); 2363 return ENOMEM; 2364 } 2365 2366 cmd = &ring->cmd[ring->cur]; 2367 cmd->code = WPI_CMD_SET_BEACON; 2368 cmd->flags = 0; 2369 cmd->qid = ring->qid; 2370 cmd->idx = ring->cur; 2371 2372 bcn = (struct wpi_cmd_beacon *)cmd->data; 2373 memset(bcn, 0, sizeof (struct wpi_cmd_beacon)); 2374 bcn->id = WPI_ID_BROADCAST; 2375 bcn->ofdm_mask = 0xff; 2376 bcn->cck_mask = 0x0f; 2377 bcn->lifetime = htole32(WPI_LIFETIME_INFINITE); 2378 bcn->len = htole16(m0->m_pkthdr.len); 2379 bcn->rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2380 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2381 bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP); 2382 2383 /* save and trim IEEE802.11 header */ 2384 m_copydata(m0, 0, sizeof (struct ieee80211_frame), (caddr_t)&bcn->wh); 2385 m_adj(m0, sizeof (struct ieee80211_frame)); 2386 2387 /* assume beacon frame is contiguous */ 2388 error = bus_dmamap_load(ring->data_dmat, data->map, mtod(m0, void *), 2389 m0->m_pkthdr.len, wpi_dma_map_addr, &physaddr, 0); 2390 if (error != 0) { 2391 device_printf(sc->sc_dev, "could not map beacon\n"); 2392 m_freem(m0); 2393 return error; 2394 } 2395 2396 data->m = m0; 2397 2398 /* first scatter/gather segment is used by the beacon command */ 2399 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24); 2400 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2401 ring->cur * sizeof (struct wpi_tx_cmd)); 2402 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon)); 2403 desc->segs[1].addr = htole32(physaddr); 2404 desc->segs[1].len = htole32(m0->m_pkthdr.len); 2405 2406 /* kick cmd ring */ 2407 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2408 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2409 2410 return 0; 2411 } 2412 #endif 2413 2414 static int 2415 wpi_auth(struct wpi_softc *sc, struct ieee80211vap *vap) 2416 { 2417 struct ieee80211com *ic = vap->iv_ic; 2418 struct ieee80211_node *ni; 2419 struct wpi_node_info node; 2420 int error; 2421 2422 2423 /* update adapter's configuration */ 2424 sc->config.associd = 0; 2425 sc->config.filter &= ~htole32(WPI_FILTER_BSS); 2426 ni = ieee80211_ref_node(vap->iv_bss); 2427 IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid); 2428 sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan); 2429 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 2430 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2431 WPI_CONFIG_24GHZ); 2432 } 2433 if (IEEE80211_IS_CHAN_A(ni->ni_chan)) { 2434 sc->config.cck_mask = 0; 2435 sc->config.ofdm_mask = 0x15; 2436 } else if (IEEE80211_IS_CHAN_B(ni->ni_chan)) { 2437 sc->config.cck_mask = 0x03; 2438 sc->config.ofdm_mask = 0; 2439 } else { 2440 /* XXX assume 802.11b/g */ 2441 sc->config.cck_mask = 0x0f; 2442 sc->config.ofdm_mask = 0x15; 2443 } 2444 2445 DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan, 2446 sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask)); 2447 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2448 sizeof (struct wpi_config), 1); 2449 if (error != 0) { 2450 device_printf(sc->sc_dev, "could not configure\n"); 2451 ieee80211_free_node(ni); 2452 return error; 2453 } 2454 2455 /* configuration has changed, set Tx power accordingly */ 2456 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { 2457 device_printf(sc->sc_dev, "could not set Tx power\n"); 2458 ieee80211_free_node(ni); 2459 return error; 2460 } 2461 2462 /* add default node */ 2463 memset(&node, 0, sizeof node); 2464 IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid); 2465 ieee80211_free_node(ni); 2466 node.id = WPI_ID_BSS; 2467 node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2468 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2469 node.action = htole32(WPI_ACTION_SET_RATE); 2470 node.antenna = WPI_ANTENNA_BOTH; 2471 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1); 2472 if (error != 0) 2473 device_printf(sc->sc_dev, "could not add BSS node\n"); 2474 2475 return (error); 2476 } 2477 2478 static int 2479 wpi_run(struct wpi_softc *sc, struct ieee80211vap *vap) 2480 { 2481 struct ieee80211com *ic = vap->iv_ic; 2482 struct ieee80211_node *ni; 2483 int error; 2484 2485 if (vap->iv_opmode == IEEE80211_M_MONITOR) { 2486 /* link LED blinks while monitoring */ 2487 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 2488 return 0; 2489 } 2490 2491 ni = ieee80211_ref_node(vap->iv_bss); 2492 wpi_enable_tsf(sc, ni); 2493 2494 /* update adapter's configuration */ 2495 sc->config.associd = htole16(ni->ni_associd & ~0xc000); 2496 /* short preamble/slot time are negotiated when associating */ 2497 sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE | 2498 WPI_CONFIG_SHSLOT); 2499 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2500 sc->config.flags |= htole32(WPI_CONFIG_SHSLOT); 2501 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 2502 sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE); 2503 sc->config.filter |= htole32(WPI_FILTER_BSS); 2504 2505 /* XXX put somewhere HC_QOS_SUPPORT_ASSOC + HC_IBSS_START */ 2506 2507 DPRINTF(("config chan %d flags %x\n", sc->config.chan, 2508 sc->config.flags)); 2509 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, sizeof (struct 2510 wpi_config), 1); 2511 if (error != 0) { 2512 device_printf(sc->sc_dev, "could not update configuration\n"); 2513 ieee80211_free_node(ni); 2514 return error; 2515 } 2516 2517 error = wpi_set_txpower(sc, ni->ni_chan, 1); 2518 ieee80211_free_node(ni); 2519 if (error != 0) { 2520 device_printf(sc->sc_dev, "could set txpower\n"); 2521 return error; 2522 } 2523 2524 /* link LED always on while associated */ 2525 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 2526 2527 /* start automatic rate control timer */ 2528 callout_reset(&sc->calib_to_callout, 60*hz, wpi_calib_timeout_callout, sc); 2529 2530 return (error); 2531 } 2532 2533 /* 2534 * Send a scan request to the firmware. Since this command is huge, we map it 2535 * into a mbufcluster instead of using the pre-allocated set of commands. Note, 2536 * much of this code is similar to that in wpi_cmd but because we must manually 2537 * construct the probe & channels, we duplicate what's needed here. XXX In the 2538 * future, this function should be modified to use wpi_cmd to help cleanup the 2539 * code base. 2540 */ 2541 static int 2542 wpi_scan(struct wpi_softc *sc) 2543 { 2544 struct ifnet *ifp = sc->sc_ifp; 2545 struct ieee80211com *ic = ifp->if_l2com; 2546 struct ieee80211_scan_state *ss = ic->ic_scan; 2547 struct wpi_tx_ring *ring = &sc->cmdq; 2548 struct wpi_tx_desc *desc; 2549 struct wpi_tx_data *data; 2550 struct wpi_tx_cmd *cmd; 2551 struct wpi_scan_hdr *hdr; 2552 struct wpi_scan_chan *chan; 2553 struct ieee80211_frame *wh; 2554 struct ieee80211_rateset *rs; 2555 struct ieee80211_channel *c; 2556 enum ieee80211_phymode mode; 2557 uint8_t *frm; 2558 int nrates, pktlen, error, i, nssid; 2559 bus_addr_t physaddr; 2560 2561 desc = &ring->desc[ring->cur]; 2562 data = &ring->data[ring->cur]; 2563 2564 data->m = m_getjcl(MB_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE); 2565 if (data->m == NULL) { 2566 device_printf(sc->sc_dev, 2567 "could not allocate mbuf for scan command\n"); 2568 return ENOMEM; 2569 } 2570 2571 cmd = mtod(data->m, struct wpi_tx_cmd *); 2572 cmd->code = WPI_CMD_SCAN; 2573 cmd->flags = 0; 2574 cmd->qid = ring->qid; 2575 cmd->idx = ring->cur; 2576 2577 hdr = (struct wpi_scan_hdr *)cmd->data; 2578 memset(hdr, 0, sizeof(struct wpi_scan_hdr)); 2579 2580 /* 2581 * Move to the next channel if no packets are received within 5 msecs 2582 * after sending the probe request (this helps to reduce the duration 2583 * of active scans). 2584 */ 2585 hdr->quiet = htole16(5); 2586 hdr->threshold = htole16(1); 2587 2588 if (IEEE80211_IS_CHAN_A(ic->ic_curchan)) { 2589 /* send probe requests at 6Mbps */ 2590 hdr->tx.rate = wpi_ridx_to_plcp[WPI_OFDM6]; 2591 2592 /* Enable crc checking */ 2593 hdr->promotion = htole16(1); 2594 } else { 2595 hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO); 2596 /* send probe requests at 1Mbps */ 2597 hdr->tx.rate = wpi_ridx_to_plcp[WPI_CCK1]; 2598 } 2599 hdr->tx.id = WPI_ID_BROADCAST; 2600 hdr->tx.lifetime = htole32(WPI_LIFETIME_INFINITE); 2601 hdr->tx.flags = htole32(WPI_TX_AUTO_SEQ); 2602 2603 memset(hdr->scan_essids, 0, sizeof(hdr->scan_essids)); 2604 nssid = MIN(ss->ss_nssid, WPI_SCAN_MAX_ESSIDS); 2605 for (i = 0; i < nssid; i++) { 2606 hdr->scan_essids[i].id = IEEE80211_ELEMID_SSID; 2607 hdr->scan_essids[i].esslen = MIN(ss->ss_ssid[i].len, 32); 2608 memcpy(hdr->scan_essids[i].essid, ss->ss_ssid[i].ssid, 2609 hdr->scan_essids[i].esslen); 2610 #ifdef WPI_DEBUG 2611 if (wpi_debug & WPI_DEBUG_SCANNING) { 2612 kprintf("Scanning Essid: "); 2613 ieee80211_print_essid(hdr->scan_essids[i].essid, 2614 hdr->scan_essids[i].esslen); 2615 kprintf("\n"); 2616 } 2617 #endif 2618 } 2619 2620 /* 2621 * Build a probe request frame. Most of the following code is a 2622 * copy & paste of what is done in net80211. 2623 */ 2624 wh = (struct ieee80211_frame *)&hdr->scan_essids[4]; 2625 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 2626 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 2627 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2628 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 2629 IEEE80211_ADDR_COPY(wh->i_addr2, IF_LLADDR(ifp)); 2630 IEEE80211_ADDR_COPY(wh->i_addr3, ifp->if_broadcastaddr); 2631 *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */ 2632 *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */ 2633 2634 frm = (uint8_t *)(wh + 1); 2635 2636 /* add essid IE, the hardware will fill this in for us */ 2637 *frm++ = IEEE80211_ELEMID_SSID; 2638 *frm++ = 0; 2639 2640 mode = ieee80211_chan2mode(ic->ic_curchan); 2641 rs = &ic->ic_sup_rates[mode]; 2642 2643 /* add supported rates IE */ 2644 *frm++ = IEEE80211_ELEMID_RATES; 2645 nrates = rs->rs_nrates; 2646 if (nrates > IEEE80211_RATE_SIZE) 2647 nrates = IEEE80211_RATE_SIZE; 2648 *frm++ = nrates; 2649 memcpy(frm, rs->rs_rates, nrates); 2650 frm += nrates; 2651 2652 /* add supported xrates IE */ 2653 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 2654 nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 2655 *frm++ = IEEE80211_ELEMID_XRATES; 2656 *frm++ = nrates; 2657 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 2658 frm += nrates; 2659 } 2660 2661 /* setup length of probe request */ 2662 hdr->tx.len = htole16(frm - (uint8_t *)wh); 2663 2664 /* 2665 * Construct information about the channel that we 2666 * want to scan. The firmware expects this to be directly 2667 * after the scan probe request 2668 */ 2669 c = ic->ic_curchan; 2670 chan = (struct wpi_scan_chan *)frm; 2671 chan->chan = ieee80211_chan2ieee(ic, c); 2672 chan->flags = 0; 2673 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2674 chan->flags |= WPI_CHAN_ACTIVE; 2675 if (nssid != 0) 2676 chan->flags |= WPI_CHAN_DIRECT; 2677 } 2678 chan->gain_dsp = 0x6e; /* Default level */ 2679 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2680 chan->active = htole16(10); 2681 chan->passive = htole16(ss->ss_maxdwell); 2682 chan->gain_radio = 0x3b; 2683 } else { 2684 chan->active = htole16(20); 2685 chan->passive = htole16(ss->ss_maxdwell); 2686 chan->gain_radio = 0x28; 2687 } 2688 2689 DPRINTFN(WPI_DEBUG_SCANNING, 2690 ("Scanning %u Passive: %d\n", 2691 chan->chan, 2692 c->ic_flags & IEEE80211_CHAN_PASSIVE)); 2693 2694 hdr->nchan++; 2695 chan++; 2696 2697 frm += sizeof (struct wpi_scan_chan); 2698 #if 0 2699 // XXX All Channels.... 2700 for (c = &ic->ic_channels[1]; 2701 c <= &ic->ic_channels[IEEE80211_CHAN_MAX]; c++) { 2702 if ((c->ic_flags & ic->ic_curchan->ic_flags) != ic->ic_curchan->ic_flags) 2703 continue; 2704 2705 chan->chan = ieee80211_chan2ieee(ic, c); 2706 chan->flags = 0; 2707 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2708 chan->flags |= WPI_CHAN_ACTIVE; 2709 if (ic->ic_des_ssid[0].len != 0) 2710 chan->flags |= WPI_CHAN_DIRECT; 2711 } 2712 chan->gain_dsp = 0x6e; /* Default level */ 2713 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2714 chan->active = htole16(10); 2715 chan->passive = htole16(110); 2716 chan->gain_radio = 0x3b; 2717 } else { 2718 chan->active = htole16(20); 2719 chan->passive = htole16(120); 2720 chan->gain_radio = 0x28; 2721 } 2722 2723 DPRINTFN(WPI_DEBUG_SCANNING, 2724 ("Scanning %u Passive: %d\n", 2725 chan->chan, 2726 c->ic_flags & IEEE80211_CHAN_PASSIVE)); 2727 2728 hdr->nchan++; 2729 chan++; 2730 2731 frm += sizeof (struct wpi_scan_chan); 2732 } 2733 #endif 2734 2735 hdr->len = htole16(frm - (uint8_t *)hdr); 2736 pktlen = frm - (uint8_t *)cmd; 2737 2738 error = bus_dmamap_load(ring->data_dmat, data->map, cmd, pktlen, 2739 wpi_dma_map_addr, &physaddr, BUS_DMA_NOWAIT); 2740 if (error != 0) { 2741 device_printf(sc->sc_dev, "could not map scan command\n"); 2742 m_freem(data->m); 2743 data->m = NULL; 2744 return error; 2745 } 2746 2747 desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24); 2748 desc->segs[0].addr = htole32(physaddr); 2749 desc->segs[0].len = htole32(pktlen); 2750 2751 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 2752 BUS_DMASYNC_PREWRITE); 2753 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 2754 2755 /* kick cmd ring */ 2756 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2757 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2758 2759 sc->sc_scan_timer = 5; 2760 return 0; /* will be notified async. of failure/success */ 2761 } 2762 2763 /** 2764 * Configure the card to listen to a particular channel, this transisions the 2765 * card in to being able to receive frames from remote devices. 2766 */ 2767 static int 2768 wpi_config(struct wpi_softc *sc) 2769 { 2770 struct ifnet *ifp = sc->sc_ifp; 2771 struct ieee80211com *ic = ifp->if_l2com; 2772 struct wpi_power power; 2773 struct wpi_bluetooth bluetooth; 2774 struct wpi_node_info node; 2775 int error; 2776 2777 /* set power mode */ 2778 memset(&power, 0, sizeof power); 2779 power.flags = htole32(WPI_POWER_CAM|0x8); 2780 error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0); 2781 if (error != 0) { 2782 device_printf(sc->sc_dev, "could not set power mode\n"); 2783 return error; 2784 } 2785 2786 /* configure bluetooth coexistence */ 2787 memset(&bluetooth, 0, sizeof bluetooth); 2788 bluetooth.flags = 3; 2789 bluetooth.lead = 0xaa; 2790 bluetooth.kill = 1; 2791 error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth, 2792 0); 2793 if (error != 0) { 2794 device_printf(sc->sc_dev, 2795 "could not configure bluetooth coexistence\n"); 2796 return error; 2797 } 2798 2799 /* configure adapter */ 2800 memset(&sc->config, 0, sizeof (struct wpi_config)); 2801 IEEE80211_ADDR_COPY(sc->config.myaddr, IF_LLADDR(ifp)); 2802 /*set default channel*/ 2803 sc->config.chan = htole16(ieee80211_chan2ieee(ic, ic->ic_curchan)); 2804 sc->config.flags = htole32(WPI_CONFIG_TSF); 2805 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) { 2806 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2807 WPI_CONFIG_24GHZ); 2808 } 2809 sc->config.filter = 0; 2810 switch (ic->ic_opmode) { 2811 case IEEE80211_M_STA: 2812 case IEEE80211_M_WDS: /* No know setup, use STA for now */ 2813 sc->config.mode = WPI_MODE_STA; 2814 sc->config.filter |= htole32(WPI_FILTER_MULTICAST); 2815 break; 2816 case IEEE80211_M_IBSS: 2817 case IEEE80211_M_AHDEMO: 2818 sc->config.mode = WPI_MODE_IBSS; 2819 sc->config.filter |= htole32(WPI_FILTER_BEACON | 2820 WPI_FILTER_MULTICAST); 2821 break; 2822 case IEEE80211_M_HOSTAP: 2823 sc->config.mode = WPI_MODE_HOSTAP; 2824 break; 2825 case IEEE80211_M_MONITOR: 2826 sc->config.mode = WPI_MODE_MONITOR; 2827 sc->config.filter |= htole32(WPI_FILTER_MULTICAST | 2828 WPI_FILTER_CTL | WPI_FILTER_PROMISC); 2829 break; 2830 default: 2831 device_printf(sc->sc_dev, "unknown opmode %d\n", ic->ic_opmode); 2832 return EINVAL; 2833 } 2834 sc->config.cck_mask = 0x0f; /* not yet negotiated */ 2835 sc->config.ofdm_mask = 0xff; /* not yet negotiated */ 2836 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2837 sizeof (struct wpi_config), 0); 2838 if (error != 0) { 2839 device_printf(sc->sc_dev, "configure command failed\n"); 2840 return error; 2841 } 2842 2843 /* configuration has changed, set Tx power accordingly */ 2844 if ((error = wpi_set_txpower(sc, ic->ic_curchan, 0)) != 0) { 2845 device_printf(sc->sc_dev, "could not set Tx power\n"); 2846 return error; 2847 } 2848 2849 /* add broadcast node */ 2850 memset(&node, 0, sizeof node); 2851 IEEE80211_ADDR_COPY(node.bssid, ifp->if_broadcastaddr); 2852 node.id = WPI_ID_BROADCAST; 2853 node.rate = wpi_plcp_signal(2); 2854 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0); 2855 if (error != 0) { 2856 device_printf(sc->sc_dev, "could not add broadcast node\n"); 2857 return error; 2858 } 2859 2860 /* Setup rate scalling */ 2861 error = wpi_mrr_setup(sc); 2862 if (error != 0) { 2863 device_printf(sc->sc_dev, "could not setup MRR\n"); 2864 return error; 2865 } 2866 2867 return 0; 2868 } 2869 2870 static void 2871 wpi_stop_master(struct wpi_softc *sc) 2872 { 2873 uint32_t tmp; 2874 int ntries; 2875 2876 DPRINTFN(WPI_DEBUG_HW,("Disabling Firmware execution\n")); 2877 2878 tmp = WPI_READ(sc, WPI_RESET); 2879 WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER | WPI_NEVO_RESET); 2880 2881 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2882 if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP) 2883 return; /* already asleep */ 2884 2885 for (ntries = 0; ntries < 100; ntries++) { 2886 if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED) 2887 break; 2888 DELAY(10); 2889 } 2890 if (ntries == 100) { 2891 device_printf(sc->sc_dev, "timeout waiting for master\n"); 2892 } 2893 } 2894 2895 static int 2896 wpi_power_up(struct wpi_softc *sc) 2897 { 2898 uint32_t tmp; 2899 int ntries; 2900 2901 wpi_mem_lock(sc); 2902 tmp = wpi_mem_read(sc, WPI_MEM_POWER); 2903 wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000); 2904 wpi_mem_unlock(sc); 2905 2906 for (ntries = 0; ntries < 5000; ntries++) { 2907 if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED) 2908 break; 2909 DELAY(10); 2910 } 2911 if (ntries == 5000) { 2912 device_printf(sc->sc_dev, 2913 "timeout waiting for NIC to power up\n"); 2914 return ETIMEDOUT; 2915 } 2916 return 0; 2917 } 2918 2919 static int 2920 wpi_reset(struct wpi_softc *sc) 2921 { 2922 uint32_t tmp; 2923 int ntries; 2924 2925 DPRINTFN(WPI_DEBUG_HW, 2926 ("Resetting the card - clearing any uploaded firmware\n")); 2927 2928 /* clear any pending interrupts */ 2929 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 2930 2931 tmp = WPI_READ(sc, WPI_PLL_CTL); 2932 WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT); 2933 2934 tmp = WPI_READ(sc, WPI_CHICKEN); 2935 WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS); 2936 2937 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2938 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT); 2939 2940 /* wait for clock stabilization */ 2941 for (ntries = 0; ntries < 25000; ntries++) { 2942 if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK) 2943 break; 2944 DELAY(10); 2945 } 2946 if (ntries == 25000) { 2947 device_printf(sc->sc_dev, 2948 "timeout waiting for clock stabilization\n"); 2949 return ETIMEDOUT; 2950 } 2951 2952 /* initialize EEPROM */ 2953 tmp = WPI_READ(sc, WPI_EEPROM_STATUS); 2954 2955 if ((tmp & WPI_EEPROM_VERSION) == 0) { 2956 device_printf(sc->sc_dev, "EEPROM not found\n"); 2957 return EIO; 2958 } 2959 WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED); 2960 2961 return 0; 2962 } 2963 2964 static void 2965 wpi_hw_config(struct wpi_softc *sc) 2966 { 2967 uint32_t rev, hw; 2968 2969 /* voodoo from the Linux "driver".. */ 2970 hw = WPI_READ(sc, WPI_HWCONFIG); 2971 2972 rev = pci_read_config(sc->sc_dev, PCIR_REVID, 1); 2973 if ((rev & 0xc0) == 0x40) 2974 hw |= WPI_HW_ALM_MB; 2975 else if (!(rev & 0x80)) 2976 hw |= WPI_HW_ALM_MM; 2977 2978 if (sc->cap == 0x80) 2979 hw |= WPI_HW_SKU_MRC; 2980 2981 hw &= ~WPI_HW_REV_D; 2982 if ((le16toh(sc->rev) & 0xf0) == 0xd0) 2983 hw |= WPI_HW_REV_D; 2984 2985 if (sc->type > 1) 2986 hw |= WPI_HW_TYPE_B; 2987 2988 WPI_WRITE(sc, WPI_HWCONFIG, hw); 2989 } 2990 2991 static void 2992 wpi_rfkill_resume(struct wpi_softc *sc) 2993 { 2994 struct ifnet *ifp = sc->sc_ifp; 2995 struct ieee80211com *ic = ifp->if_l2com; 2996 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2997 int ntries; 2998 2999 /* enable firmware again */ 3000 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3001 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3002 3003 /* wait for thermal sensors to calibrate */ 3004 for (ntries = 0; ntries < 1000; ntries++) { 3005 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3006 break; 3007 DELAY(10); 3008 } 3009 3010 if (ntries == 1000) { 3011 device_printf(sc->sc_dev, 3012 "timeout waiting for thermal calibration\n"); 3013 return; 3014 } 3015 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp)); 3016 3017 if (wpi_config(sc) != 0) { 3018 device_printf(sc->sc_dev, "device config failed\n"); 3019 return; 3020 } 3021 3022 ifq_clr_oactive(&ifp->if_snd); 3023 ifp->if_flags |= IFF_RUNNING; 3024 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3025 3026 if (vap != NULL) { 3027 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 3028 if (vap->iv_opmode != IEEE80211_M_MONITOR) { 3029 ieee80211_beacon_miss(ic); 3030 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 3031 } else 3032 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 3033 } else { 3034 ieee80211_scan_next(vap); 3035 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 3036 } 3037 } 3038 3039 callout_reset(&sc->watchdog_to_callout, hz, wpi_watchdog_callout, sc); 3040 } 3041 3042 static void 3043 wpi_init_locked(struct wpi_softc *sc, int force) 3044 { 3045 struct ifnet *ifp = sc->sc_ifp; 3046 uint32_t tmp; 3047 int ntries, qid; 3048 3049 wpi_stop_locked(sc); 3050 (void)wpi_reset(sc); 3051 3052 wpi_mem_lock(sc); 3053 wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00); 3054 DELAY(20); 3055 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 3056 wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800); 3057 wpi_mem_unlock(sc); 3058 3059 (void)wpi_power_up(sc); 3060 wpi_hw_config(sc); 3061 3062 /* init Rx ring */ 3063 wpi_mem_lock(sc); 3064 WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr); 3065 WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr + 3066 offsetof(struct wpi_shared, next)); 3067 WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7); 3068 WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010); 3069 wpi_mem_unlock(sc); 3070 3071 /* init Tx rings */ 3072 wpi_mem_lock(sc); 3073 wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */ 3074 wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */ 3075 wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */ 3076 wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000); 3077 wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002); 3078 wpi_mem_write(sc, WPI_MEM_MAGIC4, 4); 3079 wpi_mem_write(sc, WPI_MEM_MAGIC5, 5); 3080 3081 WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr); 3082 WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5); 3083 3084 for (qid = 0; qid < 6; qid++) { 3085 WPI_WRITE(sc, WPI_TX_CTL(qid), 0); 3086 WPI_WRITE(sc, WPI_TX_BASE(qid), 0); 3087 WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008); 3088 } 3089 wpi_mem_unlock(sc); 3090 3091 /* clear "radio off" and "disable command" bits (reversed logic) */ 3092 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3093 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3094 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3095 3096 /* clear any pending interrupts */ 3097 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 3098 3099 /* enable interrupts */ 3100 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 3101 3102 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3103 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3104 3105 if ((wpi_load_firmware(sc)) != 0) { 3106 device_printf(sc->sc_dev, 3107 "A problem occurred loading the firmware to the driver\n"); 3108 return; 3109 } 3110 3111 /* At this point the firmware is up and running. If the hardware 3112 * RF switch is turned off thermal calibration will fail, though 3113 * the card is still happy to continue to accept commands, catch 3114 * this case and schedule a task to watch for it to be turned on. 3115 */ 3116 wpi_mem_lock(sc); 3117 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF); 3118 wpi_mem_unlock(sc); 3119 3120 if (!(tmp & 0x1)) { 3121 sc->flags |= WPI_FLAG_HW_RADIO_OFF; 3122 device_printf(sc->sc_dev,"Radio Transmitter is switched off\n"); 3123 goto out; 3124 } 3125 3126 /* wait for thermal sensors to calibrate */ 3127 for (ntries = 0; ntries < 1000; ntries++) { 3128 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3129 break; 3130 DELAY(10); 3131 } 3132 3133 if (ntries == 1000) { 3134 device_printf(sc->sc_dev, 3135 "timeout waiting for thermal sensors calibration\n"); 3136 return; 3137 } 3138 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp)); 3139 3140 if (wpi_config(sc) != 0) { 3141 device_printf(sc->sc_dev, "device config failed\n"); 3142 return; 3143 } 3144 3145 ifq_clr_oactive(&ifp->if_snd); 3146 ifp->if_flags |= IFF_RUNNING; 3147 out: 3148 callout_reset(&sc->watchdog_to_callout, hz, wpi_watchdog_callout, sc); 3149 } 3150 3151 static void 3152 wpi_init(void *arg) 3153 { 3154 struct wpi_softc *sc = arg; 3155 struct ifnet *ifp = sc->sc_ifp; 3156 struct ieee80211com *ic = ifp->if_l2com; 3157 3158 wpi_init_locked(sc, 0); 3159 3160 if (ifp->if_flags & IFF_RUNNING) 3161 ieee80211_start_all(ic); /* start all vaps */ 3162 } 3163 3164 static void 3165 wpi_stop_locked(struct wpi_softc *sc) 3166 { 3167 struct ifnet *ifp = sc->sc_ifp; 3168 uint32_t tmp; 3169 int ac; 3170 3171 sc->sc_tx_timer = 0; 3172 sc->sc_scan_timer = 0; 3173 ifp->if_flags &= ~IFF_RUNNING; 3174 ifq_clr_oactive(&ifp->if_snd); 3175 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3176 callout_stop(&sc->watchdog_to_callout); 3177 callout_stop(&sc->calib_to_callout); 3178 3179 3180 /* disable interrupts */ 3181 WPI_WRITE(sc, WPI_MASK, 0); 3182 WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK); 3183 WPI_WRITE(sc, WPI_INTR_STATUS, 0xff); 3184 WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000); 3185 3186 wpi_mem_lock(sc); 3187 wpi_mem_write(sc, WPI_MEM_MODE, 0); 3188 wpi_mem_unlock(sc); 3189 3190 /* reset all Tx rings */ 3191 for (ac = 0; ac < 4; ac++) 3192 wpi_reset_tx_ring(sc, &sc->txq[ac]); 3193 wpi_reset_tx_ring(sc, &sc->cmdq); 3194 3195 /* reset Rx ring */ 3196 wpi_reset_rx_ring(sc, &sc->rxq); 3197 3198 wpi_mem_lock(sc); 3199 wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200); 3200 wpi_mem_unlock(sc); 3201 3202 DELAY(5); 3203 3204 wpi_stop_master(sc); 3205 3206 tmp = WPI_READ(sc, WPI_RESET); 3207 WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET); 3208 sc->flags &= ~WPI_FLAG_BUSY; 3209 } 3210 3211 static void 3212 wpi_stop(struct wpi_softc *sc) 3213 { 3214 wpi_stop_locked(sc); 3215 } 3216 3217 static void 3218 wpi_newassoc(struct ieee80211_node *ni, int isnew) 3219 { 3220 /* XXX move */ 3221 ieee80211_ratectl_node_init(ni); 3222 } 3223 3224 static void 3225 wpi_calib_timeout_callout(void *arg) 3226 { 3227 struct wpi_softc *sc = arg; 3228 struct ifnet *ifp = sc->sc_ifp; 3229 struct ieee80211com *ic = ifp->if_l2com; 3230 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3231 int temp; 3232 3233 if (vap->iv_state != IEEE80211_S_RUN) 3234 return; 3235 3236 /* update sensor data */ 3237 temp = (int)WPI_READ(sc, WPI_TEMPERATURE); 3238 DPRINTFN(WPI_DEBUG_TEMP,("Temp in calibration is: %d\n", temp)); 3239 3240 wpi_power_calibration(sc, temp); 3241 3242 callout_reset(&sc->calib_to_callout, 60*hz, wpi_calib_timeout_callout, sc); 3243 } 3244 3245 /* 3246 * This function is called periodically (every 60 seconds) to adjust output 3247 * power to temperature changes. 3248 */ 3249 static void 3250 wpi_power_calibration(struct wpi_softc *sc, int temp) 3251 { 3252 struct ifnet *ifp = sc->sc_ifp; 3253 struct ieee80211com *ic = ifp->if_l2com; 3254 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3255 3256 /* sanity-check read value */ 3257 if (temp < -260 || temp > 25) { 3258 /* this can't be correct, ignore */ 3259 DPRINTFN(WPI_DEBUG_TEMP, 3260 ("out-of-range temperature reported: %d\n", temp)); 3261 return; 3262 } 3263 3264 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d->%d\n", sc->temp, temp)); 3265 3266 /* adjust Tx power if need be */ 3267 if (abs(temp - sc->temp) <= 6) 3268 return; 3269 3270 sc->temp = temp; 3271 3272 if (wpi_set_txpower(sc, vap->iv_bss->ni_chan, 1) != 0) { 3273 /* just warn, too bad for the automatic calibration... */ 3274 device_printf(sc->sc_dev,"could not adjust Tx power\n"); 3275 } 3276 } 3277 3278 /** 3279 * Read the eeprom to find out what channels are valid for the given 3280 * band and update net80211 with what we find. 3281 */ 3282 static void 3283 wpi_read_eeprom_channels(struct wpi_softc *sc, int n) 3284 { 3285 struct ifnet *ifp = sc->sc_ifp; 3286 struct ieee80211com *ic = ifp->if_l2com; 3287 const struct wpi_chan_band *band = &wpi_bands[n]; 3288 struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND]; 3289 struct ieee80211_channel *c; 3290 int chan, i, passive; 3291 3292 wpi_read_prom_data(sc, band->addr, channels, 3293 band->nchan * sizeof (struct wpi_eeprom_chan)); 3294 3295 for (i = 0; i < band->nchan; i++) { 3296 if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID)) { 3297 DPRINTFN(WPI_DEBUG_HW, 3298 ("Channel Not Valid: %d, band %d\n", 3299 band->chan[i],n)); 3300 continue; 3301 } 3302 3303 passive = 0; 3304 chan = band->chan[i]; 3305 c = &ic->ic_channels[ic->ic_nchans++]; 3306 3307 /* is active scan allowed on this channel? */ 3308 if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) { 3309 passive = IEEE80211_CHAN_PASSIVE; 3310 } 3311 3312 if (n == 0) { /* 2GHz band */ 3313 c->ic_ieee = chan; 3314 c->ic_freq = ieee80211_ieee2mhz(chan, 3315 IEEE80211_CHAN_2GHZ); 3316 c->ic_flags = IEEE80211_CHAN_B | passive; 3317 3318 c = &ic->ic_channels[ic->ic_nchans++]; 3319 c->ic_ieee = chan; 3320 c->ic_freq = ieee80211_ieee2mhz(chan, 3321 IEEE80211_CHAN_2GHZ); 3322 c->ic_flags = IEEE80211_CHAN_G | passive; 3323 3324 } else { /* 5GHz band */ 3325 /* 3326 * Some 3945ABG adapters support channels 7, 8, 11 3327 * and 12 in the 2GHz *and* 5GHz bands. 3328 * Because of limitations in our net80211(9) stack, 3329 * we can't support these channels in 5GHz band. 3330 * XXX not true; just need to map to proper frequency 3331 */ 3332 if (chan <= 14) 3333 continue; 3334 3335 c->ic_ieee = chan; 3336 c->ic_freq = ieee80211_ieee2mhz(chan, 3337 IEEE80211_CHAN_5GHZ); 3338 c->ic_flags = IEEE80211_CHAN_A | passive; 3339 } 3340 3341 /* save maximum allowed power for this channel */ 3342 sc->maxpwr[chan] = channels[i].maxpwr; 3343 3344 #if 0 3345 // XXX We can probably use this an get rid of maxpwr - ben 20070617 3346 ic->ic_channels[chan].ic_maxpower = channels[i].maxpwr; 3347 //ic->ic_channels[chan].ic_minpower... 3348 //ic->ic_channels[chan].ic_maxregtxpower... 3349 #endif 3350 3351 DPRINTF(("adding chan %d (%dMHz) flags=0x%x maxpwr=%d" 3352 " passive=%d, offset %d\n", chan, c->ic_freq, 3353 channels[i].flags, sc->maxpwr[chan], 3354 (c->ic_flags & IEEE80211_CHAN_PASSIVE) != 0, 3355 ic->ic_nchans)); 3356 } 3357 } 3358 3359 static void 3360 wpi_read_eeprom_group(struct wpi_softc *sc, int n) 3361 { 3362 struct wpi_power_group *group = &sc->groups[n]; 3363 struct wpi_eeprom_group rgroup; 3364 int i; 3365 3366 wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup, 3367 sizeof rgroup); 3368 3369 /* save power group information */ 3370 group->chan = rgroup.chan; 3371 group->maxpwr = rgroup.maxpwr; 3372 /* temperature at which the samples were taken */ 3373 group->temp = (int16_t)le16toh(rgroup.temp); 3374 3375 DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n, 3376 group->chan, group->maxpwr, group->temp)); 3377 3378 for (i = 0; i < WPI_SAMPLES_COUNT; i++) { 3379 group->samples[i].index = rgroup.samples[i].index; 3380 group->samples[i].power = rgroup.samples[i].power; 3381 3382 DPRINTF(("\tsample %d: index=%d power=%d\n", i, 3383 group->samples[i].index, group->samples[i].power)); 3384 } 3385 } 3386 3387 /* 3388 * Update Tx power to match what is defined for channel `c'. 3389 */ 3390 static int 3391 wpi_set_txpower(struct wpi_softc *sc, struct ieee80211_channel *c, int async) 3392 { 3393 struct ifnet *ifp = sc->sc_ifp; 3394 struct ieee80211com *ic = ifp->if_l2com; 3395 struct wpi_power_group *group; 3396 struct wpi_cmd_txpower txpower; 3397 u_int chan; 3398 int i; 3399 3400 /* get channel number */ 3401 chan = ieee80211_chan2ieee(ic, c); 3402 3403 /* find the power group to which this channel belongs */ 3404 if (IEEE80211_IS_CHAN_5GHZ(c)) { 3405 for (group = &sc->groups[1]; group < &sc->groups[4]; group++) 3406 if (chan <= group->chan) 3407 break; 3408 } else 3409 group = &sc->groups[0]; 3410 3411 memset(&txpower, 0, sizeof txpower); 3412 txpower.band = IEEE80211_IS_CHAN_5GHZ(c) ? 0 : 1; 3413 txpower.channel = htole16(chan); 3414 3415 /* set Tx power for all OFDM and CCK rates */ 3416 for (i = 0; i <= 11 ; i++) { 3417 /* retrieve Tx power for this channel/rate combination */ 3418 int idx = wpi_get_power_index(sc, group, c, 3419 wpi_ridx_to_rate[i]); 3420 3421 txpower.rates[i].rate = wpi_ridx_to_plcp[i]; 3422 3423 if (IEEE80211_IS_CHAN_5GHZ(c)) { 3424 txpower.rates[i].gain_radio = wpi_rf_gain_5ghz[idx]; 3425 txpower.rates[i].gain_dsp = wpi_dsp_gain_5ghz[idx]; 3426 } else { 3427 txpower.rates[i].gain_radio = wpi_rf_gain_2ghz[idx]; 3428 txpower.rates[i].gain_dsp = wpi_dsp_gain_2ghz[idx]; 3429 } 3430 DPRINTFN(WPI_DEBUG_TEMP,("chan %d/rate %d: power index %d\n", 3431 chan, wpi_ridx_to_rate[i], idx)); 3432 } 3433 3434 return wpi_cmd(sc, WPI_CMD_TXPOWER, &txpower, sizeof txpower, async); 3435 } 3436 3437 /* 3438 * Determine Tx power index for a given channel/rate combination. 3439 * This takes into account the regulatory information from EEPROM and the 3440 * current temperature. 3441 */ 3442 static int 3443 wpi_get_power_index(struct wpi_softc *sc, struct wpi_power_group *group, 3444 struct ieee80211_channel *c, int rate) 3445 { 3446 /* fixed-point arithmetic division using a n-bit fractional part */ 3447 #define fdivround(a, b, n) \ 3448 ((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n)) 3449 3450 /* linear interpolation */ 3451 #define interpolate(x, x1, y1, x2, y2, n) \ 3452 ((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n)) 3453 3454 struct ifnet *ifp = sc->sc_ifp; 3455 struct ieee80211com *ic = ifp->if_l2com; 3456 struct wpi_power_sample *sample; 3457 int pwr, idx; 3458 u_int chan; 3459 3460 /* get channel number */ 3461 chan = ieee80211_chan2ieee(ic, c); 3462 3463 /* default power is group's maximum power - 3dB */ 3464 pwr = group->maxpwr / 2; 3465 3466 /* decrease power for highest OFDM rates to reduce distortion */ 3467 switch (rate) { 3468 case 72: /* 36Mb/s */ 3469 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 0 : 5; 3470 break; 3471 case 96: /* 48Mb/s */ 3472 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 7 : 10; 3473 break; 3474 case 108: /* 54Mb/s */ 3475 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 9 : 12; 3476 break; 3477 } 3478 3479 /* never exceed channel's maximum allowed Tx power */ 3480 pwr = min(pwr, sc->maxpwr[chan]); 3481 3482 /* retrieve power index into gain tables from samples */ 3483 for (sample = group->samples; sample < &group->samples[3]; sample++) 3484 if (pwr > sample[1].power) 3485 break; 3486 /* fixed-point linear interpolation using a 19-bit fractional part */ 3487 idx = interpolate(pwr, sample[0].power, sample[0].index, 3488 sample[1].power, sample[1].index, 19); 3489 3490 /* 3491 * Adjust power index based on current temperature 3492 * - if colder than factory-calibrated: decreate output power 3493 * - if warmer than factory-calibrated: increase output power 3494 */ 3495 idx -= (sc->temp - group->temp) * 11 / 100; 3496 3497 /* decrease power for CCK rates (-5dB) */ 3498 if (!WPI_RATE_IS_OFDM(rate)) 3499 idx += 10; 3500 3501 /* keep power index in a valid range */ 3502 if (idx < 0) 3503 return 0; 3504 if (idx > WPI_MAX_PWR_INDEX) 3505 return WPI_MAX_PWR_INDEX; 3506 return idx; 3507 3508 #undef interpolate 3509 #undef fdivround 3510 } 3511 3512 /** 3513 * Called by net80211 framework to indicate that a scan 3514 * is starting. This function doesn't actually do the scan, 3515 * wpi_scan_curchan starts things off. This function is more 3516 * of an early warning from the framework we should get ready 3517 * for the scan. 3518 */ 3519 static void 3520 wpi_scan_start(struct ieee80211com *ic) 3521 { 3522 struct ifnet *ifp = ic->ic_ifp; 3523 struct wpi_softc *sc = ifp->if_softc; 3524 3525 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 3526 } 3527 3528 /** 3529 * Called by the net80211 framework, indicates that the 3530 * scan has ended. If there is a scan in progress on the card 3531 * then it should be aborted. 3532 */ 3533 static void 3534 wpi_scan_end(struct ieee80211com *ic) 3535 { 3536 /* XXX ignore */ 3537 } 3538 3539 /** 3540 * Called by the net80211 framework to indicate to the driver 3541 * that the channel should be changed 3542 */ 3543 static void 3544 wpi_set_channel(struct ieee80211com *ic) 3545 { 3546 struct ifnet *ifp = ic->ic_ifp; 3547 struct wpi_softc *sc = ifp->if_softc; 3548 int error; 3549 3550 /* 3551 * Only need to set the channel in Monitor mode. AP scanning and auth 3552 * are already taken care of by their respective firmware commands. 3553 */ 3554 if (ic->ic_opmode == IEEE80211_M_MONITOR) { 3555 error = wpi_config(sc); 3556 if (error != 0) 3557 device_printf(sc->sc_dev, 3558 "error %d settting channel\n", error); 3559 } 3560 } 3561 3562 /** 3563 * Called by net80211 to indicate that we need to scan the current 3564 * channel. The channel is previously be set via the wpi_set_channel 3565 * callback. 3566 */ 3567 static void 3568 wpi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell) 3569 { 3570 struct ieee80211vap *vap = ss->ss_vap; 3571 struct ifnet *ifp = vap->iv_ic->ic_ifp; 3572 struct wpi_softc *sc = ifp->if_softc; 3573 3574 if (wpi_scan(sc)) 3575 ieee80211_cancel_scan(vap); 3576 } 3577 3578 /** 3579 * Called by the net80211 framework to indicate 3580 * the minimum dwell time has been met, terminate the scan. 3581 * We don't actually terminate the scan as the firmware will notify 3582 * us when it's finished and we have no way to interrupt it. 3583 */ 3584 static void 3585 wpi_scan_mindwell(struct ieee80211_scan_state *ss) 3586 { 3587 /* NB: don't try to abort scan; wait for firmware to finish */ 3588 } 3589 3590 static void 3591 wpi_hwreset_task(void *arg, int pending) 3592 { 3593 struct wpi_softc *sc; 3594 3595 wlan_serialize_enter(); 3596 sc = arg; 3597 wpi_init_locked(sc, 0); 3598 wlan_serialize_exit(); 3599 } 3600 3601 static void 3602 wpi_rfreset_task(void *arg, int pending) 3603 { 3604 struct wpi_softc *sc; 3605 3606 wlan_serialize_enter(); 3607 sc = arg; 3608 wpi_rfkill_resume(sc); 3609 wlan_serialize_exit(); 3610 } 3611 3612 /* 3613 * Allocate DMA-safe memory for firmware transfer. 3614 */ 3615 static int 3616 wpi_alloc_fwmem(struct wpi_softc *sc) 3617 { 3618 /* allocate enough contiguous space to store text and data */ 3619 return wpi_dma_contig_alloc(sc, &sc->fw_dma, NULL, 3620 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 1, 3621 BUS_DMA_NOWAIT); 3622 } 3623 3624 static void 3625 wpi_free_fwmem(struct wpi_softc *sc) 3626 { 3627 wpi_dma_contig_free(&sc->fw_dma); 3628 } 3629 3630 /** 3631 * Called every second, wpi_watchdog_callout used by the watch dog timer 3632 * to check that the card is still alive 3633 */ 3634 static void 3635 wpi_watchdog_callout(void *arg) 3636 { 3637 struct wpi_softc *sc; 3638 struct ifnet *ifp; 3639 struct ieee80211com *ic; 3640 uint32_t tmp; 3641 3642 wlan_serialize_enter(); 3643 sc = arg; 3644 ifp = sc->sc_ifp; 3645 ic = ifp->if_l2com; 3646 DPRINTFN(WPI_DEBUG_WATCHDOG,("Watchdog: tick\n")); 3647 3648 if (sc->flags & WPI_FLAG_HW_RADIO_OFF) { 3649 /* No need to lock firmware memory */ 3650 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF); 3651 3652 if ((tmp & 0x1) == 0) { 3653 /* Radio kill switch is still off */ 3654 callout_reset(&sc->watchdog_to_callout, hz, wpi_watchdog_callout, sc); 3655 wlan_serialize_exit(); 3656 return; 3657 } 3658 3659 device_printf(sc->sc_dev, "Hardware Switch Enabled\n"); 3660 ieee80211_runtask(ic, &sc->sc_radiotask); 3661 wlan_serialize_exit(); 3662 return; 3663 } 3664 3665 if (sc->sc_tx_timer > 0) { 3666 if (--sc->sc_tx_timer == 0) { 3667 device_printf(sc->sc_dev,"device timeout\n"); 3668 IFNET_STAT_INC(ifp, oerrors, 1); 3669 wlan_serialize_exit(); 3670 ieee80211_runtask(ic, &sc->sc_restarttask); 3671 wlan_serialize_enter(); 3672 } 3673 } 3674 if (sc->sc_scan_timer > 0) { 3675 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3676 if (--sc->sc_scan_timer == 0 && vap != NULL) { 3677 device_printf(sc->sc_dev,"scan timeout\n"); 3678 ieee80211_cancel_scan(vap); 3679 wlan_serialize_exit(); 3680 ieee80211_runtask(ic, &sc->sc_restarttask); 3681 wlan_serialize_enter(); 3682 } 3683 } 3684 3685 if (ifp->if_flags & IFF_RUNNING) 3686 callout_reset(&sc->watchdog_to_callout, hz, wpi_watchdog_callout, sc); 3687 3688 wlan_serialize_exit(); 3689 } 3690 3691 #ifdef WPI_DEBUG 3692 static const char *wpi_cmd_str(int cmd) 3693 { 3694 switch (cmd) { 3695 case WPI_DISABLE_CMD: return "WPI_DISABLE_CMD"; 3696 case WPI_CMD_CONFIGURE: return "WPI_CMD_CONFIGURE"; 3697 case WPI_CMD_ASSOCIATE: return "WPI_CMD_ASSOCIATE"; 3698 case WPI_CMD_SET_WME: return "WPI_CMD_SET_WME"; 3699 case WPI_CMD_TSF: return "WPI_CMD_TSF"; 3700 case WPI_CMD_ADD_NODE: return "WPI_CMD_ADD_NODE"; 3701 case WPI_CMD_TX_DATA: return "WPI_CMD_TX_DATA"; 3702 case WPI_CMD_MRR_SETUP: return "WPI_CMD_MRR_SETUP"; 3703 case WPI_CMD_SET_LED: return "WPI_CMD_SET_LED"; 3704 case WPI_CMD_SET_POWER_MODE: return "WPI_CMD_SET_POWER_MODE"; 3705 case WPI_CMD_SCAN: return "WPI_CMD_SCAN"; 3706 case WPI_CMD_SET_BEACON:return "WPI_CMD_SET_BEACON"; 3707 case WPI_CMD_TXPOWER: return "WPI_CMD_TXPOWER"; 3708 case WPI_CMD_BLUETOOTH: return "WPI_CMD_BLUETOOTH"; 3709 3710 default: 3711 KASSERT(1, ("Unknown Command: %d", cmd)); 3712 return "UNKNOWN CMD"; /* Make the compiler happy */ 3713 } 3714 } 3715 #endif 3716 3717 MODULE_DEPEND(wpi, pci, 1, 1, 1); 3718 MODULE_DEPEND(wpi, wlan, 1, 1, 1); 3719 MODULE_DEPEND(wpi, firmware, 1, 1, 1); 3720 MODULE_DEPEND(wpi, wlan_amrr, 1, 1, 1);
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