1 /* $NetBSD: if_wpi.c,v 1.74 2016/06/10 13:27:14 ozaki-r Exp $ */
2
3 /*-
4 * Copyright (c) 2006, 2007
5 * Damien Bergamini <damien.bergamini@free.fr>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #include <sys/cdefs.h>
21 __KERNEL_RCSID(0, "$NetBSD: if_wpi.c,v 1.74 2016/06/10 13:27:14 ozaki-r Exp $");
22
23 /*
24 * Driver for Intel PRO/Wireless 3945ABG 802.11 network adapters.
25 */
26
27
28 #include <sys/param.h>
29 #include <sys/sockio.h>
30 #include <sys/sysctl.h>
31 #include <sys/mbuf.h>
32 #include <sys/kernel.h>
33 #include <sys/socket.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/mutex.h>
37 #include <sys/once.h>
38 #include <sys/conf.h>
39 #include <sys/kauth.h>
40 #include <sys/callout.h>
41 #include <sys/proc.h>
42 #include <sys/kthread.h>
43
44 #include <sys/bus.h>
45 #include <machine/endian.h>
46 #include <sys/intr.h>
47
48 #include <dev/pci/pcireg.h>
49 #include <dev/pci/pcivar.h>
50 #include <dev/pci/pcidevs.h>
51
52 #include <dev/sysmon/sysmonvar.h>
53
54 #include <net/bpf.h>
55 #include <net/if.h>
56 #include <net/if_arp.h>
57 #include <net/if_dl.h>
58 #include <net/if_ether.h>
59 #include <net/if_media.h>
60 #include <net/if_types.h>
61
62 #include <netinet/in.h>
63 #include <netinet/in_systm.h>
64 #include <netinet/in_var.h>
65 #include <netinet/ip.h>
66
67 #include <net80211/ieee80211_var.h>
68 #include <net80211/ieee80211_amrr.h>
69 #include <net80211/ieee80211_radiotap.h>
70
71 #include <dev/firmload.h>
72
73 #include <dev/pci/if_wpireg.h>
74 #include <dev/pci/if_wpivar.h>
75
76 static const char wpi_firmware_name[] = "iwlwifi-3945.ucode";
77 static once_t wpi_firmware_init;
78 static kmutex_t wpi_firmware_mutex;
79 static size_t wpi_firmware_users;
80 static uint8_t *wpi_firmware_image;
81 static size_t wpi_firmware_size;
82
83 static int wpi_match(device_t, cfdata_t, void *);
84 static void wpi_attach(device_t, device_t, void *);
85 static int wpi_detach(device_t , int);
86 static int wpi_dma_contig_alloc(bus_dma_tag_t, struct wpi_dma_info *,
87 void **, bus_size_t, bus_size_t, int);
88 static void wpi_dma_contig_free(struct wpi_dma_info *);
89 static int wpi_alloc_shared(struct wpi_softc *);
90 static void wpi_free_shared(struct wpi_softc *);
91 static int wpi_alloc_fwmem(struct wpi_softc *);
92 static void wpi_free_fwmem(struct wpi_softc *);
93 static struct wpi_rbuf *wpi_alloc_rbuf(struct wpi_softc *);
94 static void wpi_free_rbuf(struct mbuf *, void *, size_t, void *);
95 static int wpi_alloc_rpool(struct wpi_softc *);
96 static void wpi_free_rpool(struct wpi_softc *);
97 static int wpi_alloc_rx_ring(struct wpi_softc *, struct wpi_rx_ring *);
98 static void wpi_reset_rx_ring(struct wpi_softc *, struct wpi_rx_ring *);
99 static void wpi_free_rx_ring(struct wpi_softc *, struct wpi_rx_ring *);
100 static int wpi_alloc_tx_ring(struct wpi_softc *, struct wpi_tx_ring *,
101 int, int);
102 static void wpi_reset_tx_ring(struct wpi_softc *, struct wpi_tx_ring *);
103 static void wpi_free_tx_ring(struct wpi_softc *, struct wpi_tx_ring *);
104 static struct ieee80211_node * wpi_node_alloc(struct ieee80211_node_table *);
105 static void wpi_newassoc(struct ieee80211_node *, int);
106 static int wpi_media_change(struct ifnet *);
107 static int wpi_newstate(struct ieee80211com *, enum ieee80211_state, int);
108 static void wpi_mem_lock(struct wpi_softc *);
109 static void wpi_mem_unlock(struct wpi_softc *);
110 static uint32_t wpi_mem_read(struct wpi_softc *, uint16_t);
111 static void wpi_mem_write(struct wpi_softc *, uint16_t, uint32_t);
112 static void wpi_mem_write_region_4(struct wpi_softc *, uint16_t,
113 const uint32_t *, int);
114 static int wpi_read_prom_data(struct wpi_softc *, uint32_t, void *, int);
115 static int wpi_load_microcode(struct wpi_softc *, const uint8_t *, int);
116 static int wpi_cache_firmware(struct wpi_softc *);
117 static void wpi_release_firmware(void);
118 static int wpi_load_firmware(struct wpi_softc *);
119 static void wpi_calib_timeout(void *);
120 static void wpi_iter_func(void *, struct ieee80211_node *);
121 static void wpi_power_calibration(struct wpi_softc *, int);
122 static void wpi_rx_intr(struct wpi_softc *, struct wpi_rx_desc *,
123 struct wpi_rx_data *);
124 static void wpi_tx_intr(struct wpi_softc *, struct wpi_rx_desc *);
125 static void wpi_cmd_intr(struct wpi_softc *, struct wpi_rx_desc *);
126 static void wpi_notif_intr(struct wpi_softc *);
127 static int wpi_intr(void *);
128 static void wpi_read_eeprom(struct wpi_softc *);
129 static void wpi_read_eeprom_channels(struct wpi_softc *, int);
130 static void wpi_read_eeprom_group(struct wpi_softc *, int);
131 static uint8_t wpi_plcp_signal(int);
132 static int wpi_tx_data(struct wpi_softc *, struct mbuf *,
133 struct ieee80211_node *, int);
134 static void wpi_start(struct ifnet *);
135 static void wpi_watchdog(struct ifnet *);
136 static int wpi_ioctl(struct ifnet *, u_long, void *);
137 static int wpi_cmd(struct wpi_softc *, int, const void *, int, int);
138 static int wpi_wme_update(struct ieee80211com *);
139 static int wpi_mrr_setup(struct wpi_softc *);
140 static void wpi_set_led(struct wpi_softc *, uint8_t, uint8_t, uint8_t);
141 static void wpi_enable_tsf(struct wpi_softc *, struct ieee80211_node *);
142 static int wpi_set_txpower(struct wpi_softc *,
143 struct ieee80211_channel *, int);
144 static int wpi_get_power_index(struct wpi_softc *,
145 struct wpi_power_group *, struct ieee80211_channel *, int);
146 static int wpi_setup_beacon(struct wpi_softc *, struct ieee80211_node *);
147 static int wpi_auth(struct wpi_softc *);
148 static int wpi_scan(struct wpi_softc *);
149 static int wpi_config(struct wpi_softc *);
150 static void wpi_stop_master(struct wpi_softc *);
151 static int wpi_power_up(struct wpi_softc *);
152 static int wpi_reset(struct wpi_softc *);
153 static void wpi_hw_config(struct wpi_softc *);
154 static int wpi_init(struct ifnet *);
155 static void wpi_stop(struct ifnet *, int);
156 static bool wpi_resume(device_t, const pmf_qual_t *);
157 static int wpi_getrfkill(struct wpi_softc *);
158 static void wpi_sysctlattach(struct wpi_softc *);
159 static void wpi_rsw_thread(void *);
160
161 #ifdef WPI_DEBUG
162 #define DPRINTF(x) do { if (wpi_debug > 0) printf x; } while (0)
163 #define DPRINTFN(n, x) do { if (wpi_debug >= (n)) printf x; } while (0)
164 int wpi_debug = 1;
165 #else
166 #define DPRINTF(x)
167 #define DPRINTFN(n, x)
168 #endif
169
170 CFATTACH_DECL_NEW(wpi, sizeof (struct wpi_softc), wpi_match, wpi_attach,
171 wpi_detach, NULL);
172
173 static int
wpi_match(device_t parent,cfdata_t match __unused,void * aux)174 wpi_match(device_t parent, cfdata_t match __unused, void *aux)
175 {
176 struct pci_attach_args *pa = aux;
177
178 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL)
179 return 0;
180
181 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PRO_WL_3945ABG_1 ||
182 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PRO_WL_3945ABG_2)
183 return 1;
184
185 return 0;
186 }
187
188 /* Base Address Register */
189 #define WPI_PCI_BAR0 0x10
190
191 static int
wpi_attach_once(void)192 wpi_attach_once(void)
193 {
194
195 mutex_init(&wpi_firmware_mutex, MUTEX_DEFAULT, IPL_NONE);
196 return 0;
197 }
198
199 static void
wpi_attach(device_t parent __unused,device_t self,void * aux)200 wpi_attach(device_t parent __unused, device_t self, void *aux)
201 {
202 struct wpi_softc *sc = device_private(self);
203 struct ieee80211com *ic = &sc->sc_ic;
204 struct ifnet *ifp = &sc->sc_ec.ec_if;
205 struct pci_attach_args *pa = aux;
206 const char *intrstr;
207 bus_space_tag_t memt;
208 bus_space_handle_t memh;
209 pci_intr_handle_t ih;
210 pcireg_t data;
211 int ac, error;
212 char intrbuf[PCI_INTRSTR_LEN];
213
214 RUN_ONCE(&wpi_firmware_init, wpi_attach_once);
215 sc->fw_used = false;
216
217 sc->sc_dev = self;
218 sc->sc_pct = pa->pa_pc;
219 sc->sc_pcitag = pa->pa_tag;
220
221 sc->sc_rsw_status = WPI_RSW_UNKNOWN;
222 sc->sc_rsw.smpsw_name = device_xname(self);
223 sc->sc_rsw.smpsw_type = PSWITCH_TYPE_RADIO;
224 error = sysmon_pswitch_register(&sc->sc_rsw);
225 if (error) {
226 aprint_error_dev(self,
227 "unable to register radio switch with sysmon\n");
228 return;
229 }
230 mutex_init(&sc->sc_rsw_mtx, MUTEX_DEFAULT, IPL_NONE);
231 cv_init(&sc->sc_rsw_cv, "wpirsw");
232 if (kthread_create(PRI_NONE, 0, NULL,
233 wpi_rsw_thread, sc, &sc->sc_rsw_lwp, "%s", device_xname(self))) {
234 aprint_error_dev(self, "couldn't create switch thread\n");
235 }
236
237 callout_init(&sc->calib_to, 0);
238 callout_setfunc(&sc->calib_to, wpi_calib_timeout, sc);
239
240 pci_aprint_devinfo(pa, NULL);
241
242 /* enable bus-mastering */
243 data = pci_conf_read(sc->sc_pct, sc->sc_pcitag, PCI_COMMAND_STATUS_REG);
244 data |= PCI_COMMAND_MASTER_ENABLE;
245 pci_conf_write(sc->sc_pct, sc->sc_pcitag, PCI_COMMAND_STATUS_REG, data);
246
247 /* map the register window */
248 error = pci_mapreg_map(pa, WPI_PCI_BAR0, PCI_MAPREG_TYPE_MEM |
249 PCI_MAPREG_MEM_TYPE_32BIT, 0, &memt, &memh, NULL, &sc->sc_sz);
250 if (error != 0) {
251 aprint_error_dev(self, "could not map memory space\n");
252 return;
253 }
254
255 sc->sc_st = memt;
256 sc->sc_sh = memh;
257 sc->sc_dmat = pa->pa_dmat;
258
259 if (pci_intr_map(pa, &ih) != 0) {
260 aprint_error_dev(self, "could not map interrupt\n");
261 return;
262 }
263
264 intrstr = pci_intr_string(sc->sc_pct, ih, intrbuf, sizeof(intrbuf));
265 sc->sc_ih = pci_intr_establish(sc->sc_pct, ih, IPL_NET, wpi_intr, sc);
266 if (sc->sc_ih == NULL) {
267 aprint_error_dev(self, "could not establish interrupt");
268 if (intrstr != NULL)
269 aprint_error(" at %s", intrstr);
270 aprint_error("\n");
271 return;
272 }
273 aprint_normal_dev(self, "interrupting at %s\n", intrstr);
274
275 /*
276 * Put adapter into a known state.
277 */
278 if ((error = wpi_reset(sc)) != 0) {
279 aprint_error_dev(self, "could not reset adapter\n");
280 return;
281 }
282
283 /*
284 * Allocate DMA memory for firmware transfers.
285 */
286 if ((error = wpi_alloc_fwmem(sc)) != 0) {
287 aprint_error_dev(self, "could not allocate firmware memory\n");
288 return;
289 }
290
291 /*
292 * Allocate shared page and Tx/Rx rings.
293 */
294 if ((error = wpi_alloc_shared(sc)) != 0) {
295 aprint_error_dev(self, "could not allocate shared area\n");
296 goto fail1;
297 }
298
299 if ((error = wpi_alloc_rpool(sc)) != 0) {
300 aprint_error_dev(self, "could not allocate Rx buffers\n");
301 goto fail2;
302 }
303
304 for (ac = 0; ac < 4; ac++) {
305 error = wpi_alloc_tx_ring(sc, &sc->txq[ac], WPI_TX_RING_COUNT,
306 ac);
307 if (error != 0) {
308 aprint_error_dev(self,
309 "could not allocate Tx ring %d\n", ac);
310 goto fail3;
311 }
312 }
313
314 error = wpi_alloc_tx_ring(sc, &sc->cmdq, WPI_CMD_RING_COUNT, 4);
315 if (error != 0) {
316 aprint_error_dev(self, "could not allocate command ring\n");
317 goto fail3;
318 }
319
320 error = wpi_alloc_rx_ring(sc, &sc->rxq);
321 if (error != 0) {
322 aprint_error_dev(self, "could not allocate Rx ring\n");
323 goto fail4;
324 }
325
326 ic->ic_ifp = ifp;
327 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
328 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */
329 ic->ic_state = IEEE80211_S_INIT;
330
331 /* set device capabilities */
332 ic->ic_caps =
333 IEEE80211_C_WPA | /* 802.11i */
334 IEEE80211_C_MONITOR | /* monitor mode supported */
335 IEEE80211_C_TXPMGT | /* tx power management */
336 IEEE80211_C_SHSLOT | /* short slot time supported */
337 IEEE80211_C_SHPREAMBLE | /* short preamble supported */
338 IEEE80211_C_WME; /* 802.11e */
339
340 /* read supported channels and MAC address from EEPROM */
341 wpi_read_eeprom(sc);
342
343 /* set supported .11a, .11b and .11g rates */
344 ic->ic_sup_rates[IEEE80211_MODE_11A] = ieee80211_std_rateset_11a;
345 ic->ic_sup_rates[IEEE80211_MODE_11B] = ieee80211_std_rateset_11b;
346 ic->ic_sup_rates[IEEE80211_MODE_11G] = ieee80211_std_rateset_11g;
347
348 /* IBSS channel undefined for now */
349 ic->ic_ibss_chan = &ic->ic_channels[0];
350
351 ifp->if_softc = sc;
352 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
353 ifp->if_init = wpi_init;
354 ifp->if_stop = wpi_stop;
355 ifp->if_ioctl = wpi_ioctl;
356 ifp->if_start = wpi_start;
357 ifp->if_watchdog = wpi_watchdog;
358 IFQ_SET_READY(&ifp->if_snd);
359 memcpy(ifp->if_xname, device_xname(self), IFNAMSIZ);
360
361 if_attach(ifp);
362 ieee80211_ifattach(ic);
363 /* override default methods */
364 ic->ic_node_alloc = wpi_node_alloc;
365 ic->ic_newassoc = wpi_newassoc;
366 ic->ic_wme.wme_update = wpi_wme_update;
367
368 /* override state transition machine */
369 sc->sc_newstate = ic->ic_newstate;
370 ic->ic_newstate = wpi_newstate;
371 ieee80211_media_init(ic, wpi_media_change, ieee80211_media_status);
372
373 sc->amrr.amrr_min_success_threshold = 1;
374 sc->amrr.amrr_max_success_threshold = 15;
375
376 wpi_sysctlattach(sc);
377
378 if (pmf_device_register(self, NULL, wpi_resume))
379 pmf_class_network_register(self, ifp);
380 else
381 aprint_error_dev(self, "couldn't establish power handler\n");
382
383 bpf_attach2(ifp, DLT_IEEE802_11_RADIO,
384 sizeof(struct ieee80211_frame) + IEEE80211_RADIOTAP_HDRLEN,
385 &sc->sc_drvbpf);
386
387 sc->sc_rxtap_len = sizeof sc->sc_rxtapu;
388 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len);
389 sc->sc_rxtap.wr_ihdr.it_present = htole32(WPI_RX_RADIOTAP_PRESENT);
390
391 sc->sc_txtap_len = sizeof sc->sc_txtapu;
392 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len);
393 sc->sc_txtap.wt_ihdr.it_present = htole32(WPI_TX_RADIOTAP_PRESENT);
394
395 ieee80211_announce(ic);
396
397 return;
398
399 /* free allocated memory if something failed during attachment */
400 fail4: wpi_free_tx_ring(sc, &sc->cmdq);
401 fail3: while (--ac >= 0)
402 wpi_free_tx_ring(sc, &sc->txq[ac]);
403 wpi_free_rpool(sc);
404 fail2: wpi_free_shared(sc);
405 fail1: wpi_free_fwmem(sc);
406 }
407
408 static int
wpi_detach(device_t self,int flags __unused)409 wpi_detach(device_t self, int flags __unused)
410 {
411 struct wpi_softc *sc = device_private(self);
412 struct ifnet *ifp = sc->sc_ic.ic_ifp;
413 int ac;
414
415 wpi_stop(ifp, 1);
416
417 if (ifp != NULL)
418 bpf_detach(ifp);
419 ieee80211_ifdetach(&sc->sc_ic);
420 if (ifp != NULL)
421 if_detach(ifp);
422
423 for (ac = 0; ac < 4; ac++)
424 wpi_free_tx_ring(sc, &sc->txq[ac]);
425 wpi_free_tx_ring(sc, &sc->cmdq);
426 wpi_free_rx_ring(sc, &sc->rxq);
427 wpi_free_rpool(sc);
428 wpi_free_shared(sc);
429
430 if (sc->sc_ih != NULL) {
431 pci_intr_disestablish(sc->sc_pct, sc->sc_ih);
432 sc->sc_ih = NULL;
433 }
434 mutex_enter(&sc->sc_rsw_mtx);
435 sc->sc_dying = 1;
436 cv_signal(&sc->sc_rsw_cv);
437 while (sc->sc_rsw_lwp != NULL)
438 cv_wait(&sc->sc_rsw_cv, &sc->sc_rsw_mtx);
439 mutex_exit(&sc->sc_rsw_mtx);
440 sysmon_pswitch_unregister(&sc->sc_rsw);
441
442 bus_space_unmap(sc->sc_st, sc->sc_sh, sc->sc_sz);
443
444 if (sc->fw_used) {
445 sc->fw_used = false;
446 wpi_release_firmware();
447 }
448 cv_destroy(&sc->sc_rsw_cv);
449 mutex_destroy(&sc->sc_rsw_mtx);
450 return 0;
451 }
452
453 static int
wpi_dma_contig_alloc(bus_dma_tag_t tag,struct wpi_dma_info * dma,void ** kvap,bus_size_t size,bus_size_t alignment,int flags)454 wpi_dma_contig_alloc(bus_dma_tag_t tag, struct wpi_dma_info *dma, void **kvap,
455 bus_size_t size, bus_size_t alignment, int flags)
456 {
457 int nsegs, error;
458
459 dma->tag = tag;
460 dma->size = size;
461
462 error = bus_dmamap_create(tag, size, 1, size, 0, flags, &dma->map);
463 if (error != 0)
464 goto fail;
465
466 error = bus_dmamem_alloc(tag, size, alignment, 0, &dma->seg, 1, &nsegs,
467 flags);
468 if (error != 0)
469 goto fail;
470
471 error = bus_dmamem_map(tag, &dma->seg, 1, size, &dma->vaddr, flags);
472 if (error != 0)
473 goto fail;
474
475 error = bus_dmamap_load(tag, dma->map, dma->vaddr, size, NULL, flags);
476 if (error != 0)
477 goto fail;
478
479 memset(dma->vaddr, 0, size);
480 bus_dmamap_sync(dma->tag, dma->map, 0, size, BUS_DMASYNC_PREWRITE);
481
482 dma->paddr = dma->map->dm_segs[0].ds_addr;
483 if (kvap != NULL)
484 *kvap = dma->vaddr;
485
486 return 0;
487
488 fail: wpi_dma_contig_free(dma);
489 return error;
490 }
491
492 static void
wpi_dma_contig_free(struct wpi_dma_info * dma)493 wpi_dma_contig_free(struct wpi_dma_info *dma)
494 {
495 if (dma->map != NULL) {
496 if (dma->vaddr != NULL) {
497 bus_dmamap_unload(dma->tag, dma->map);
498 bus_dmamem_unmap(dma->tag, dma->vaddr, dma->size);
499 bus_dmamem_free(dma->tag, &dma->seg, 1);
500 dma->vaddr = NULL;
501 }
502 bus_dmamap_destroy(dma->tag, dma->map);
503 dma->map = NULL;
504 }
505 }
506
507 /*
508 * Allocate a shared page between host and NIC.
509 */
510 static int
wpi_alloc_shared(struct wpi_softc * sc)511 wpi_alloc_shared(struct wpi_softc *sc)
512 {
513 int error;
514
515 /* must be aligned on a 4K-page boundary */
516 error = wpi_dma_contig_alloc(sc->sc_dmat, &sc->shared_dma,
517 (void **)&sc->shared, sizeof (struct wpi_shared), WPI_BUF_ALIGN,
518 BUS_DMA_NOWAIT);
519 if (error != 0)
520 aprint_error_dev(sc->sc_dev,
521 "could not allocate shared area DMA memory\n");
522
523 return error;
524 }
525
526 static void
wpi_free_shared(struct wpi_softc * sc)527 wpi_free_shared(struct wpi_softc *sc)
528 {
529 wpi_dma_contig_free(&sc->shared_dma);
530 }
531
532 /*
533 * Allocate DMA-safe memory for firmware transfer.
534 */
535 static int
wpi_alloc_fwmem(struct wpi_softc * sc)536 wpi_alloc_fwmem(struct wpi_softc *sc)
537 {
538 int error;
539
540 /* allocate enough contiguous space to store text and data */
541 error = wpi_dma_contig_alloc(sc->sc_dmat, &sc->fw_dma, NULL,
542 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 0,
543 BUS_DMA_NOWAIT);
544
545 if (error != 0)
546 aprint_error_dev(sc->sc_dev,
547 "could not allocate firmware transfer area DMA memory\n");
548 return error;
549 }
550
551 static void
wpi_free_fwmem(struct wpi_softc * sc)552 wpi_free_fwmem(struct wpi_softc *sc)
553 {
554 wpi_dma_contig_free(&sc->fw_dma);
555 }
556
557 static struct wpi_rbuf *
wpi_alloc_rbuf(struct wpi_softc * sc)558 wpi_alloc_rbuf(struct wpi_softc *sc)
559 {
560 struct wpi_rbuf *rbuf;
561
562 mutex_enter(&sc->rxq.freelist_mtx);
563 rbuf = SLIST_FIRST(&sc->rxq.freelist);
564 if (rbuf != NULL) {
565 SLIST_REMOVE_HEAD(&sc->rxq.freelist, next);
566 }
567 mutex_exit(&sc->rxq.freelist_mtx);
568
569 return rbuf;
570 }
571
572 /*
573 * This is called automatically by the network stack when the mbuf to which our
574 * Rx buffer is attached is freed.
575 */
576 static void
wpi_free_rbuf(struct mbuf * m,void * buf,size_t size,void * arg)577 wpi_free_rbuf(struct mbuf* m, void *buf, size_t size, void *arg)
578 {
579 struct wpi_rbuf *rbuf = arg;
580 struct wpi_softc *sc = rbuf->sc;
581
582 /* put the buffer back in the free list */
583
584 mutex_enter(&sc->rxq.freelist_mtx);
585 SLIST_INSERT_HEAD(&sc->rxq.freelist, rbuf, next);
586 mutex_exit(&sc->rxq.freelist_mtx);
587
588 if (__predict_true(m != NULL))
589 pool_cache_put(mb_cache, m);
590 }
591
592 static int
wpi_alloc_rpool(struct wpi_softc * sc)593 wpi_alloc_rpool(struct wpi_softc *sc)
594 {
595 struct wpi_rx_ring *ring = &sc->rxq;
596 int i, error;
597
598 /* allocate a big chunk of DMA'able memory.. */
599 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->buf_dma, NULL,
600 WPI_RBUF_COUNT * WPI_RBUF_SIZE, WPI_BUF_ALIGN, BUS_DMA_NOWAIT);
601 if (error != 0) {
602 aprint_normal_dev(sc->sc_dev,
603 "could not allocate Rx buffers DMA memory\n");
604 return error;
605 }
606
607 /* ..and split it into 3KB chunks */
608 mutex_init(&ring->freelist_mtx, MUTEX_DEFAULT, IPL_NET);
609 SLIST_INIT(&ring->freelist);
610 for (i = 0; i < WPI_RBUF_COUNT; i++) {
611 struct wpi_rbuf *rbuf = &ring->rbuf[i];
612
613 rbuf->sc = sc; /* backpointer for callbacks */
614 rbuf->vaddr = (char *)ring->buf_dma.vaddr + i * WPI_RBUF_SIZE;
615 rbuf->paddr = ring->buf_dma.paddr + i * WPI_RBUF_SIZE;
616
617 SLIST_INSERT_HEAD(&ring->freelist, rbuf, next);
618 }
619
620 return 0;
621 }
622
623 static void
wpi_free_rpool(struct wpi_softc * sc)624 wpi_free_rpool(struct wpi_softc *sc)
625 {
626 wpi_dma_contig_free(&sc->rxq.buf_dma);
627 }
628
629 static int
wpi_alloc_rx_ring(struct wpi_softc * sc,struct wpi_rx_ring * ring)630 wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring)
631 {
632 bus_size_t size;
633 int i, error;
634
635 ring->cur = 0;
636
637 size = WPI_RX_RING_COUNT * sizeof (uint32_t);
638 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma,
639 (void **)&ring->desc, size,
640 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT);
641 if (error != 0) {
642 aprint_error_dev(sc->sc_dev,
643 "could not allocate rx ring DMA memory\n");
644 goto fail;
645 }
646
647 /*
648 * Setup Rx buffers.
649 */
650 for (i = 0; i < WPI_RX_RING_COUNT; i++) {
651 struct wpi_rx_data *data = &ring->data[i];
652 struct wpi_rbuf *rbuf;
653
654 error = bus_dmamap_create(sc->sc_dmat, WPI_RBUF_SIZE, 1,
655 WPI_RBUF_SIZE, 0, BUS_DMA_NOWAIT, &data->map);
656 if (error) {
657 aprint_error_dev(sc->sc_dev,
658 "could not allocate rx dma map\n");
659 goto fail;
660 }
661
662 MGETHDR(data->m, M_DONTWAIT, MT_DATA);
663 if (data->m == NULL) {
664 aprint_error_dev(sc->sc_dev,
665 "could not allocate rx mbuf\n");
666 error = ENOMEM;
667 goto fail;
668 }
669 if ((rbuf = wpi_alloc_rbuf(sc)) == NULL) {
670 m_freem(data->m);
671 data->m = NULL;
672 aprint_error_dev(sc->sc_dev,
673 "could not allocate rx cluster\n");
674 error = ENOMEM;
675 goto fail;
676 }
677 /* attach Rx buffer to mbuf */
678 MEXTADD(data->m, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf,
679 rbuf);
680 data->m->m_flags |= M_EXT_RW;
681
682 error = bus_dmamap_load(sc->sc_dmat, data->map,
683 mtod(data->m, void *), WPI_RBUF_SIZE, NULL,
684 BUS_DMA_NOWAIT | BUS_DMA_READ);
685 if (error) {
686 aprint_error_dev(sc->sc_dev,
687 "could not load mbuf: %d\n", error);
688 goto fail;
689 }
690
691 ring->desc[i] = htole32(rbuf->paddr);
692 }
693
694 bus_dmamap_sync(sc->sc_dmat, ring->desc_dma.map, 0, size,
695 BUS_DMASYNC_PREWRITE);
696
697 return 0;
698
699 fail: wpi_free_rx_ring(sc, ring);
700 return error;
701 }
702
703 static void
wpi_reset_rx_ring(struct wpi_softc * sc,struct wpi_rx_ring * ring)704 wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring)
705 {
706 int ntries;
707
708 wpi_mem_lock(sc);
709
710 WPI_WRITE(sc, WPI_RX_CONFIG, 0);
711 for (ntries = 0; ntries < 100; ntries++) {
712 if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE)
713 break;
714 DELAY(10);
715 }
716 #ifdef WPI_DEBUG
717 if (ntries == 100 && wpi_debug > 0)
718 aprint_error_dev(sc->sc_dev, "timeout resetting Rx ring\n");
719 #endif
720 wpi_mem_unlock(sc);
721
722 ring->cur = 0;
723 }
724
725 static void
wpi_free_rx_ring(struct wpi_softc * sc,struct wpi_rx_ring * ring)726 wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring)
727 {
728 int i;
729
730 wpi_dma_contig_free(&ring->desc_dma);
731
732 for (i = 0; i < WPI_RX_RING_COUNT; i++) {
733 if (ring->data[i].m != NULL) {
734 bus_dmamap_unload(sc->sc_dmat, ring->data[i].map);
735 m_freem(ring->data[i].m);
736 }
737 if (ring->data[i].map != NULL) {
738 bus_dmamap_destroy(sc->sc_dmat, ring->data[i].map);
739 }
740 }
741 }
742
743 static int
wpi_alloc_tx_ring(struct wpi_softc * sc,struct wpi_tx_ring * ring,int count,int qid)744 wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int count,
745 int qid)
746 {
747 int i, error;
748
749 ring->qid = qid;
750 ring->count = count;
751 ring->queued = 0;
752 ring->cur = 0;
753
754 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma,
755 (void **)&ring->desc, count * sizeof (struct wpi_tx_desc),
756 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT);
757 if (error != 0) {
758 aprint_error_dev(sc->sc_dev,
759 "could not allocate tx ring DMA memory\n");
760 goto fail;
761 }
762
763 /* update shared page with ring's base address */
764 sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr);
765 bus_dmamap_sync(sc->sc_dmat, sc->shared_dma.map, 0,
766 sizeof(struct wpi_shared), BUS_DMASYNC_PREWRITE);
767
768 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->cmd_dma,
769 (void **)&ring->cmd, count * sizeof (struct wpi_tx_cmd), 4,
770 BUS_DMA_NOWAIT);
771 if (error != 0) {
772 aprint_error_dev(sc->sc_dev,
773 "could not allocate tx cmd DMA memory\n");
774 goto fail;
775 }
776
777 ring->data = malloc(count * sizeof (struct wpi_tx_data), M_DEVBUF,
778 M_NOWAIT | M_ZERO);
779 if (ring->data == NULL) {
780 aprint_error_dev(sc->sc_dev,
781 "could not allocate tx data slots\n");
782 goto fail;
783 }
784
785 for (i = 0; i < count; i++) {
786 struct wpi_tx_data *data = &ring->data[i];
787
788 error = bus_dmamap_create(sc->sc_dmat, MCLBYTES,
789 WPI_MAX_SCATTER - 1, MCLBYTES, 0, BUS_DMA_NOWAIT,
790 &data->map);
791 if (error != 0) {
792 aprint_error_dev(sc->sc_dev,
793 "could not create tx buf DMA map\n");
794 goto fail;
795 }
796 }
797
798 return 0;
799
800 fail: wpi_free_tx_ring(sc, ring);
801 return error;
802 }
803
804 static void
wpi_reset_tx_ring(struct wpi_softc * sc,struct wpi_tx_ring * ring)805 wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring)
806 {
807 int i, ntries;
808
809 wpi_mem_lock(sc);
810
811 WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0);
812 for (ntries = 0; ntries < 100; ntries++) {
813 if (WPI_READ(sc, WPI_TX_STATUS) & WPI_TX_IDLE(ring->qid))
814 break;
815 DELAY(10);
816 }
817 #ifdef WPI_DEBUG
818 if (ntries == 100 && wpi_debug > 0) {
819 aprint_error_dev(sc->sc_dev, "timeout resetting Tx ring %d\n",
820 ring->qid);
821 }
822 #endif
823 wpi_mem_unlock(sc);
824
825 for (i = 0; i < ring->count; i++) {
826 struct wpi_tx_data *data = &ring->data[i];
827
828 if (data->m != NULL) {
829 bus_dmamap_unload(sc->sc_dmat, data->map);
830 m_freem(data->m);
831 data->m = NULL;
832 }
833 }
834
835 ring->queued = 0;
836 ring->cur = 0;
837 }
838
839 static void
wpi_free_tx_ring(struct wpi_softc * sc,struct wpi_tx_ring * ring)840 wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring)
841 {
842 int i;
843
844 wpi_dma_contig_free(&ring->desc_dma);
845 wpi_dma_contig_free(&ring->cmd_dma);
846
847 if (ring->data != NULL) {
848 for (i = 0; i < ring->count; i++) {
849 struct wpi_tx_data *data = &ring->data[i];
850
851 if (data->m != NULL) {
852 bus_dmamap_unload(sc->sc_dmat, data->map);
853 m_freem(data->m);
854 }
855 }
856 free(ring->data, M_DEVBUF);
857 }
858 }
859
860 /*ARGUSED*/
861 static struct ieee80211_node *
wpi_node_alloc(struct ieee80211_node_table * nt __unused)862 wpi_node_alloc(struct ieee80211_node_table *nt __unused)
863 {
864 struct wpi_node *wn;
865
866 wn = malloc(sizeof (struct wpi_node), M_80211_NODE, M_NOWAIT | M_ZERO);
867
868 return (struct ieee80211_node *)wn;
869 }
870
871 static void
wpi_newassoc(struct ieee80211_node * ni,int isnew)872 wpi_newassoc(struct ieee80211_node *ni, int isnew)
873 {
874 struct wpi_softc *sc = ni->ni_ic->ic_ifp->if_softc;
875 int i;
876
877 ieee80211_amrr_node_init(&sc->amrr, &((struct wpi_node *)ni)->amn);
878
879 /* set rate to some reasonable initial value */
880 for (i = ni->ni_rates.rs_nrates - 1;
881 i > 0 && (ni->ni_rates.rs_rates[i] & IEEE80211_RATE_VAL) > 72;
882 i--);
883 ni->ni_txrate = i;
884 }
885
886 static int
wpi_media_change(struct ifnet * ifp)887 wpi_media_change(struct ifnet *ifp)
888 {
889 int error;
890
891 error = ieee80211_media_change(ifp);
892 if (error != ENETRESET)
893 return error;
894
895 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING))
896 wpi_init(ifp);
897
898 return 0;
899 }
900
901 static int
wpi_newstate(struct ieee80211com * ic,enum ieee80211_state nstate,int arg)902 wpi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
903 {
904 struct ifnet *ifp = ic->ic_ifp;
905 struct wpi_softc *sc = ifp->if_softc;
906 struct ieee80211_node *ni;
907 enum ieee80211_state ostate = ic->ic_state;
908 int error;
909
910 callout_stop(&sc->calib_to);
911
912 switch (nstate) {
913 case IEEE80211_S_SCAN:
914
915 if (sc->is_scanning)
916 break;
917
918 sc->is_scanning = true;
919
920 if (ostate != IEEE80211_S_SCAN) {
921 /* make the link LED blink while we're scanning */
922 wpi_set_led(sc, WPI_LED_LINK, 20, 2);
923 }
924
925 if ((error = wpi_scan(sc)) != 0) {
926 aprint_error_dev(sc->sc_dev,
927 "could not initiate scan\n");
928 return error;
929 }
930 break;
931
932 case IEEE80211_S_ASSOC:
933 if (ic->ic_state != IEEE80211_S_RUN)
934 break;
935 /* FALLTHROUGH */
936 case IEEE80211_S_AUTH:
937 /* reset state to handle reassociations correctly */
938 sc->config.associd = 0;
939 sc->config.filter &= ~htole32(WPI_FILTER_BSS);
940
941 if ((error = wpi_auth(sc)) != 0) {
942 aprint_error_dev(sc->sc_dev,
943 "could not send authentication request\n");
944 return error;
945 }
946 break;
947
948 case IEEE80211_S_RUN:
949 if (ic->ic_opmode == IEEE80211_M_MONITOR) {
950 /* link LED blinks while monitoring */
951 wpi_set_led(sc, WPI_LED_LINK, 5, 5);
952 break;
953 }
954 ni = ic->ic_bss;
955
956 if (ic->ic_opmode != IEEE80211_M_STA) {
957 (void) wpi_auth(sc); /* XXX */
958 wpi_setup_beacon(sc, ni);
959 }
960
961 wpi_enable_tsf(sc, ni);
962
963 /* update adapter's configuration */
964 sc->config.associd = htole16(ni->ni_associd & ~0xc000);
965 /* short preamble/slot time are negotiated when associating */
966 sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE |
967 WPI_CONFIG_SHSLOT);
968 if (ic->ic_flags & IEEE80211_F_SHSLOT)
969 sc->config.flags |= htole32(WPI_CONFIG_SHSLOT);
970 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
971 sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE);
972 sc->config.filter |= htole32(WPI_FILTER_BSS);
973 if (ic->ic_opmode != IEEE80211_M_STA)
974 sc->config.filter |= htole32(WPI_FILTER_BEACON);
975
976 /* XXX put somewhere HC_QOS_SUPPORT_ASSOC + HC_IBSS_START */
977
978 DPRINTF(("config chan %d flags %x\n", sc->config.chan,
979 sc->config.flags));
980 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config,
981 sizeof (struct wpi_config), 1);
982 if (error != 0) {
983 aprint_error_dev(sc->sc_dev,
984 "could not update configuration\n");
985 return error;
986 }
987
988 /* configuration has changed, set Tx power accordingly */
989 if ((error = wpi_set_txpower(sc, ic->ic_curchan, 1)) != 0) {
990 aprint_error_dev(sc->sc_dev,
991 "could not set Tx power\n");
992 return error;
993 }
994
995 if (ic->ic_opmode == IEEE80211_M_STA) {
996 /* fake a join to init the tx rate */
997 wpi_newassoc(ni, 1);
998 }
999
1000 /* start periodic calibration timer */
1001 sc->calib_cnt = 0;
1002 callout_schedule(&sc->calib_to, hz/2);
1003
1004 /* link LED always on while associated */
1005 wpi_set_led(sc, WPI_LED_LINK, 0, 1);
1006 break;
1007
1008 case IEEE80211_S_INIT:
1009 sc->is_scanning = false;
1010 break;
1011 }
1012
1013 return sc->sc_newstate(ic, nstate, arg);
1014 }
1015
1016 /*
1017 * Grab exclusive access to NIC memory.
1018 */
1019 static void
wpi_mem_lock(struct wpi_softc * sc)1020 wpi_mem_lock(struct wpi_softc *sc)
1021 {
1022 uint32_t tmp;
1023 int ntries;
1024
1025 tmp = WPI_READ(sc, WPI_GPIO_CTL);
1026 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC);
1027
1028 /* spin until we actually get the lock */
1029 for (ntries = 0; ntries < 1000; ntries++) {
1030 if ((WPI_READ(sc, WPI_GPIO_CTL) &
1031 (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK)
1032 break;
1033 DELAY(10);
1034 }
1035 if (ntries == 1000)
1036 aprint_error_dev(sc->sc_dev, "could not lock memory\n");
1037 }
1038
1039 /*
1040 * Release lock on NIC memory.
1041 */
1042 static void
wpi_mem_unlock(struct wpi_softc * sc)1043 wpi_mem_unlock(struct wpi_softc *sc)
1044 {
1045 uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL);
1046 WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC);
1047 }
1048
1049 static uint32_t
wpi_mem_read(struct wpi_softc * sc,uint16_t addr)1050 wpi_mem_read(struct wpi_softc *sc, uint16_t addr)
1051 {
1052 WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr);
1053 return WPI_READ(sc, WPI_READ_MEM_DATA);
1054 }
1055
1056 static void
wpi_mem_write(struct wpi_softc * sc,uint16_t addr,uint32_t data)1057 wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data)
1058 {
1059 WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr);
1060 WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data);
1061 }
1062
1063 static void
wpi_mem_write_region_4(struct wpi_softc * sc,uint16_t addr,const uint32_t * data,int wlen)1064 wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr,
1065 const uint32_t *data, int wlen)
1066 {
1067 for (; wlen > 0; wlen--, data++, addr += 4)
1068 wpi_mem_write(sc, addr, *data);
1069 }
1070
1071 /*
1072 * Read `len' bytes from the EEPROM. We access the EEPROM through the MAC
1073 * instead of using the traditional bit-bang method.
1074 */
1075 static int
wpi_read_prom_data(struct wpi_softc * sc,uint32_t addr,void * data,int len)1076 wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len)
1077 {
1078 uint8_t *out = data;
1079 uint32_t val;
1080 int ntries;
1081
1082 wpi_mem_lock(sc);
1083 for (; len > 0; len -= 2, addr++) {
1084 WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2);
1085
1086 for (ntries = 0; ntries < 10; ntries++) {
1087 if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) &
1088 WPI_EEPROM_READY)
1089 break;
1090 DELAY(5);
1091 }
1092 if (ntries == 10) {
1093 aprint_error_dev(sc->sc_dev, "could not read EEPROM\n");
1094 return ETIMEDOUT;
1095 }
1096 *out++ = val >> 16;
1097 if (len > 1)
1098 *out++ = val >> 24;
1099 }
1100 wpi_mem_unlock(sc);
1101
1102 return 0;
1103 }
1104
1105 /*
1106 * The firmware boot code is small and is intended to be copied directly into
1107 * the NIC internal memory.
1108 */
1109 int
wpi_load_microcode(struct wpi_softc * sc,const uint8_t * ucode,int size)1110 wpi_load_microcode(struct wpi_softc *sc, const uint8_t *ucode, int size)
1111 {
1112 int ntries;
1113
1114 size /= sizeof (uint32_t);
1115
1116 wpi_mem_lock(sc);
1117
1118 /* copy microcode image into NIC memory */
1119 wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE,
1120 (const uint32_t *)ucode, size);
1121
1122 wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0);
1123 wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT);
1124 wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size);
1125
1126 /* run microcode */
1127 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN);
1128
1129 /* wait for transfer to complete */
1130 for (ntries = 0; ntries < 1000; ntries++) {
1131 if (!(wpi_mem_read(sc, WPI_MEM_UCODE_CTL) & WPI_UC_RUN))
1132 break;
1133 DELAY(10);
1134 }
1135 if (ntries == 1000) {
1136 wpi_mem_unlock(sc);
1137 aprint_error_dev(sc->sc_dev, "could not load boot firmware\n");
1138 return ETIMEDOUT;
1139 }
1140 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE);
1141
1142 wpi_mem_unlock(sc);
1143
1144 return 0;
1145 }
1146
1147 static int
wpi_cache_firmware(struct wpi_softc * sc)1148 wpi_cache_firmware(struct wpi_softc *sc)
1149 {
1150 const char *const fwname = wpi_firmware_name;
1151 firmware_handle_t fw;
1152 int error;
1153
1154 /* sc is used here only to report error messages. */
1155
1156 mutex_enter(&wpi_firmware_mutex);
1157
1158 if (wpi_firmware_users == SIZE_MAX) {
1159 mutex_exit(&wpi_firmware_mutex);
1160 return ENFILE; /* Too many of something in the system... */
1161 }
1162 if (wpi_firmware_users++) {
1163 KASSERT(wpi_firmware_image != NULL);
1164 KASSERT(wpi_firmware_size > 0);
1165 mutex_exit(&wpi_firmware_mutex);
1166 return 0; /* Already good to go. */
1167 }
1168
1169 KASSERT(wpi_firmware_image == NULL);
1170 KASSERT(wpi_firmware_size == 0);
1171
1172 /* load firmware image from disk */
1173 if ((error = firmware_open("if_wpi", fwname, &fw)) != 0) {
1174 aprint_error_dev(sc->sc_dev,
1175 "could not open firmware file %s: %d\n", fwname, error);
1176 goto fail0;
1177 }
1178
1179 wpi_firmware_size = firmware_get_size(fw);
1180
1181 if (wpi_firmware_size > sizeof (struct wpi_firmware_hdr) +
1182 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ +
1183 WPI_FW_INIT_TEXT_MAXSZ + WPI_FW_INIT_DATA_MAXSZ +
1184 WPI_FW_BOOT_TEXT_MAXSZ) {
1185 aprint_error_dev(sc->sc_dev,
1186 "firmware file %s too large: %zu bytes\n",
1187 fwname, wpi_firmware_size);
1188 error = EFBIG;
1189 goto fail1;
1190 }
1191
1192 if (wpi_firmware_size < sizeof (struct wpi_firmware_hdr)) {
1193 aprint_error_dev(sc->sc_dev,
1194 "firmware file %s too small: %zu bytes\n",
1195 fwname, wpi_firmware_size);
1196 error = EINVAL;
1197 goto fail1;
1198 }
1199
1200 wpi_firmware_image = firmware_malloc(wpi_firmware_size);
1201 if (wpi_firmware_image == NULL) {
1202 aprint_error_dev(sc->sc_dev,
1203 "not enough memory for firmware file %s\n", fwname);
1204 error = ENOMEM;
1205 goto fail1;
1206 }
1207
1208 error = firmware_read(fw, 0, wpi_firmware_image, wpi_firmware_size);
1209 if (error != 0) {
1210 aprint_error_dev(sc->sc_dev,
1211 "error reading firmware file %s: %d\n", fwname, error);
1212 goto fail2;
1213 }
1214
1215 /* Success! */
1216 firmware_close(fw);
1217 mutex_exit(&wpi_firmware_mutex);
1218 return 0;
1219
1220 fail2:
1221 firmware_free(wpi_firmware_image, wpi_firmware_size);
1222 wpi_firmware_image = NULL;
1223 fail1:
1224 wpi_firmware_size = 0;
1225 firmware_close(fw);
1226 fail0:
1227 KASSERT(wpi_firmware_users == 1);
1228 wpi_firmware_users = 0;
1229 KASSERT(wpi_firmware_image == NULL);
1230 KASSERT(wpi_firmware_size == 0);
1231
1232 mutex_exit(&wpi_firmware_mutex);
1233 return error;
1234 }
1235
1236 static void
wpi_release_firmware(void)1237 wpi_release_firmware(void)
1238 {
1239
1240 mutex_enter(&wpi_firmware_mutex);
1241
1242 KASSERT(wpi_firmware_users > 0);
1243 KASSERT(wpi_firmware_image != NULL);
1244 KASSERT(wpi_firmware_size != 0);
1245
1246 if (--wpi_firmware_users == 0) {
1247 firmware_free(wpi_firmware_image, wpi_firmware_size);
1248 wpi_firmware_image = NULL;
1249 wpi_firmware_size = 0;
1250 }
1251
1252 mutex_exit(&wpi_firmware_mutex);
1253 }
1254
1255 static int
wpi_load_firmware(struct wpi_softc * sc)1256 wpi_load_firmware(struct wpi_softc *sc)
1257 {
1258 struct wpi_dma_info *dma = &sc->fw_dma;
1259 struct wpi_firmware_hdr hdr;
1260 const uint8_t *init_text, *init_data, *main_text, *main_data;
1261 const uint8_t *boot_text;
1262 uint32_t init_textsz, init_datasz, main_textsz, main_datasz;
1263 uint32_t boot_textsz;
1264 size_t size;
1265 int error;
1266
1267 if (!sc->fw_used) {
1268 if ((error = wpi_cache_firmware(sc)) != 0)
1269 return error;
1270 sc->fw_used = true;
1271 }
1272
1273 KASSERT(sc->fw_used);
1274 KASSERT(wpi_firmware_image != NULL);
1275 KASSERT(wpi_firmware_size > sizeof(hdr));
1276
1277 memcpy(&hdr, wpi_firmware_image, sizeof(hdr));
1278
1279 main_textsz = le32toh(hdr.main_textsz);
1280 main_datasz = le32toh(hdr.main_datasz);
1281 init_textsz = le32toh(hdr.init_textsz);
1282 init_datasz = le32toh(hdr.init_datasz);
1283 boot_textsz = le32toh(hdr.boot_textsz);
1284
1285 /* sanity-check firmware segments sizes */
1286 if (main_textsz > WPI_FW_MAIN_TEXT_MAXSZ ||
1287 main_datasz > WPI_FW_MAIN_DATA_MAXSZ ||
1288 init_textsz > WPI_FW_INIT_TEXT_MAXSZ ||
1289 init_datasz > WPI_FW_INIT_DATA_MAXSZ ||
1290 boot_textsz > WPI_FW_BOOT_TEXT_MAXSZ ||
1291 (boot_textsz & 3) != 0) {
1292 aprint_error_dev(sc->sc_dev, "invalid firmware header\n");
1293 error = EINVAL;
1294 goto free_firmware;
1295 }
1296
1297 /* check that all firmware segments are present */
1298 size = sizeof (struct wpi_firmware_hdr) + main_textsz +
1299 main_datasz + init_textsz + init_datasz + boot_textsz;
1300 if (wpi_firmware_size < size) {
1301 aprint_error_dev(sc->sc_dev,
1302 "firmware file truncated: %zu bytes, expected %zu bytes\n",
1303 wpi_firmware_size, size);
1304 error = EINVAL;
1305 goto free_firmware;
1306 }
1307
1308 /* get pointers to firmware segments */
1309 main_text = wpi_firmware_image + sizeof (struct wpi_firmware_hdr);
1310 main_data = main_text + main_textsz;
1311 init_text = main_data + main_datasz;
1312 init_data = init_text + init_textsz;
1313 boot_text = init_data + init_datasz;
1314
1315 /* copy initialization images into pre-allocated DMA-safe memory */
1316 memcpy(dma->vaddr, init_data, init_datasz);
1317 memcpy((char *)dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, init_text,
1318 init_textsz);
1319
1320 bus_dmamap_sync(dma->tag, dma->map, 0, dma->size, BUS_DMASYNC_PREWRITE);
1321
1322 /* tell adapter where to find initialization images */
1323 wpi_mem_lock(sc);
1324 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr);
1325 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, init_datasz);
1326 wpi_mem_write(sc, WPI_MEM_TEXT_BASE,
1327 dma->paddr + WPI_FW_INIT_DATA_MAXSZ);
1328 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, init_textsz);
1329 wpi_mem_unlock(sc);
1330
1331 /* load firmware boot code */
1332 if ((error = wpi_load_microcode(sc, boot_text, boot_textsz)) != 0) {
1333 aprint_error_dev(sc->sc_dev, "could not load boot firmware\n");
1334 return error;
1335 }
1336
1337 /* now press "execute" ;-) */
1338 WPI_WRITE(sc, WPI_RESET, 0);
1339
1340 /* wait at most one second for first alive notification */
1341 if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) {
1342 /* this isn't what was supposed to happen.. */
1343 aprint_error_dev(sc->sc_dev,
1344 "timeout waiting for adapter to initialize\n");
1345 }
1346
1347 /* copy runtime images into pre-allocated DMA-safe memory */
1348 memcpy(dma->vaddr, main_data, main_datasz);
1349 memcpy((char *)dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, main_text,
1350 main_textsz);
1351
1352 bus_dmamap_sync(dma->tag, dma->map, 0, dma->size, BUS_DMASYNC_PREWRITE);
1353
1354 /* tell adapter where to find runtime images */
1355 wpi_mem_lock(sc);
1356 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr);
1357 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, main_datasz);
1358 wpi_mem_write(sc, WPI_MEM_TEXT_BASE,
1359 dma->paddr + WPI_FW_MAIN_DATA_MAXSZ);
1360 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | main_textsz);
1361 wpi_mem_unlock(sc);
1362
1363 /* wait at most one second for second alive notification */
1364 if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) {
1365 /* this isn't what was supposed to happen.. */
1366 aprint_error_dev(sc->sc_dev,
1367 "timeout waiting for adapter to initialize\n");
1368 }
1369
1370 return error;
1371
1372 free_firmware:
1373 sc->fw_used = false;
1374 wpi_release_firmware();
1375 return error;
1376 }
1377
1378 static void
wpi_calib_timeout(void * arg)1379 wpi_calib_timeout(void *arg)
1380 {
1381 struct wpi_softc *sc = arg;
1382 struct ieee80211com *ic = &sc->sc_ic;
1383 int temp, s;
1384
1385 /* automatic rate control triggered every 500ms */
1386 if (ic->ic_fixed_rate == -1) {
1387 s = splnet();
1388 if (ic->ic_opmode == IEEE80211_M_STA)
1389 wpi_iter_func(sc, ic->ic_bss);
1390 else
1391 ieee80211_iterate_nodes(&ic->ic_sta, wpi_iter_func, sc);
1392 splx(s);
1393 }
1394
1395 /* update sensor data */
1396 temp = (int)WPI_READ(sc, WPI_TEMPERATURE);
1397
1398 /* automatic power calibration every 60s */
1399 if (++sc->calib_cnt >= 120) {
1400 wpi_power_calibration(sc, temp);
1401 sc->calib_cnt = 0;
1402 }
1403
1404 callout_schedule(&sc->calib_to, hz/2);
1405 }
1406
1407 static void
wpi_iter_func(void * arg,struct ieee80211_node * ni)1408 wpi_iter_func(void *arg, struct ieee80211_node *ni)
1409 {
1410 struct wpi_softc *sc = arg;
1411 struct wpi_node *wn = (struct wpi_node *)ni;
1412
1413 ieee80211_amrr_choose(&sc->amrr, ni, &wn->amn);
1414 }
1415
1416 /*
1417 * This function is called periodically (every 60 seconds) to adjust output
1418 * power to temperature changes.
1419 */
1420 void
wpi_power_calibration(struct wpi_softc * sc,int temp)1421 wpi_power_calibration(struct wpi_softc *sc, int temp)
1422 {
1423 /* sanity-check read value */
1424 if (temp < -260 || temp > 25) {
1425 /* this can't be correct, ignore */
1426 DPRINTF(("out-of-range temperature reported: %d\n", temp));
1427 return;
1428 }
1429
1430 DPRINTF(("temperature %d->%d\n", sc->temp, temp));
1431
1432 /* adjust Tx power if need be */
1433 if (abs(temp - sc->temp) <= 6)
1434 return;
1435
1436 sc->temp = temp;
1437
1438 if (wpi_set_txpower(sc, sc->sc_ic.ic_curchan, 1) != 0) {
1439 /* just warn, too bad for the automatic calibration... */
1440 aprint_error_dev(sc->sc_dev, "could not adjust Tx power\n");
1441 }
1442 }
1443
1444 static void
wpi_rx_intr(struct wpi_softc * sc,struct wpi_rx_desc * desc,struct wpi_rx_data * data)1445 wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc,
1446 struct wpi_rx_data *data)
1447 {
1448 struct ieee80211com *ic = &sc->sc_ic;
1449 struct ifnet *ifp = ic->ic_ifp;
1450 struct wpi_rx_ring *ring = &sc->rxq;
1451 struct wpi_rx_stat *stat;
1452 struct wpi_rx_head *head;
1453 struct wpi_rx_tail *tail;
1454 struct wpi_rbuf *rbuf;
1455 struct ieee80211_frame *wh;
1456 struct ieee80211_node *ni;
1457 struct mbuf *m, *mnew;
1458 int data_off, error;
1459
1460 bus_dmamap_sync(sc->sc_dmat, data->map, 0, data->map->dm_mapsize,
1461 BUS_DMASYNC_POSTREAD);
1462 stat = (struct wpi_rx_stat *)(desc + 1);
1463
1464 if (stat->len > WPI_STAT_MAXLEN) {
1465 aprint_error_dev(sc->sc_dev, "invalid rx statistic header\n");
1466 ifp->if_ierrors++;
1467 return;
1468 }
1469
1470 head = (struct wpi_rx_head *)((char *)(stat + 1) + stat->len);
1471 tail = (struct wpi_rx_tail *)((char *)(head + 1) + le16toh(head->len));
1472
1473 DPRINTFN(4, ("rx intr: idx=%d len=%d stat len=%d rssi=%d rate=%x "
1474 "chan=%d tstamp=%" PRIu64 "\n", ring->cur, le32toh(desc->len),
1475 le16toh(head->len), (int8_t)stat->rssi, head->rate, head->chan,
1476 le64toh(tail->tstamp)));
1477
1478 /*
1479 * Discard Rx frames with bad CRC early (XXX we may want to pass them
1480 * to radiotap in monitor mode).
1481 */
1482 if ((le32toh(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) {
1483 DPRINTF(("rx tail flags error %x\n",
1484 le32toh(tail->flags)));
1485 ifp->if_ierrors++;
1486 return;
1487 }
1488
1489 /* Compute where are the useful datas */
1490 data_off = (char*)(head + 1) - mtod(data->m, char*);
1491
1492 MGETHDR(mnew, M_DONTWAIT, MT_DATA);
1493 if (mnew == NULL) {
1494 ifp->if_ierrors++;
1495 return;
1496 }
1497
1498 rbuf = wpi_alloc_rbuf(sc);
1499 if (rbuf == NULL) {
1500 m_freem(mnew);
1501 ifp->if_ierrors++;
1502 return;
1503 }
1504
1505 /* attach Rx buffer to mbuf */
1506 MEXTADD(mnew, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf,
1507 rbuf);
1508 mnew->m_flags |= M_EXT_RW;
1509
1510 bus_dmamap_unload(sc->sc_dmat, data->map);
1511
1512 error = bus_dmamap_load(sc->sc_dmat, data->map,
1513 mtod(mnew, void *), WPI_RBUF_SIZE, NULL,
1514 BUS_DMA_NOWAIT | BUS_DMA_READ);
1515 if (error) {
1516 device_printf(sc->sc_dev,
1517 "couldn't load rx mbuf: %d\n", error);
1518 m_freem(mnew);
1519 ifp->if_ierrors++;
1520
1521 error = bus_dmamap_load(sc->sc_dmat, data->map,
1522 mtod(data->m, void *), WPI_RBUF_SIZE, NULL,
1523 BUS_DMA_NOWAIT | BUS_DMA_READ);
1524 if (error)
1525 panic("%s: bus_dmamap_load failed: %d\n",
1526 device_xname(sc->sc_dev), error);
1527 return;
1528 }
1529
1530 /* new mbuf loaded successfully */
1531 m = data->m;
1532 data->m = mnew;
1533
1534 /* update Rx descriptor */
1535 ring->desc[ring->cur] = htole32(rbuf->paddr);
1536 bus_dmamap_sync(sc->sc_dmat, ring->desc_dma.map, 0,
1537 ring->desc_dma.size,
1538 BUS_DMASYNC_PREWRITE);
1539
1540 m->m_data = (char*)m->m_data + data_off;
1541 m->m_pkthdr.len = m->m_len = le16toh(head->len);
1542
1543 /* finalize mbuf */
1544 m_set_rcvif(m, ifp);
1545
1546 if (sc->sc_drvbpf != NULL) {
1547 struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap;
1548
1549 tap->wr_flags = 0;
1550 tap->wr_chan_freq =
1551 htole16(ic->ic_channels[head->chan].ic_freq);
1552 tap->wr_chan_flags =
1553 htole16(ic->ic_channels[head->chan].ic_flags);
1554 tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET);
1555 tap->wr_dbm_antnoise = (int8_t)le16toh(stat->noise);
1556 tap->wr_tsft = tail->tstamp;
1557 tap->wr_antenna = (le16toh(head->flags) >> 4) & 0xf;
1558 switch (head->rate) {
1559 /* CCK rates */
1560 case 10: tap->wr_rate = 2; break;
1561 case 20: tap->wr_rate = 4; break;
1562 case 55: tap->wr_rate = 11; break;
1563 case 110: tap->wr_rate = 22; break;
1564 /* OFDM rates */
1565 case 0xd: tap->wr_rate = 12; break;
1566 case 0xf: tap->wr_rate = 18; break;
1567 case 0x5: tap->wr_rate = 24; break;
1568 case 0x7: tap->wr_rate = 36; break;
1569 case 0x9: tap->wr_rate = 48; break;
1570 case 0xb: tap->wr_rate = 72; break;
1571 case 0x1: tap->wr_rate = 96; break;
1572 case 0x3: tap->wr_rate = 108; break;
1573 /* unknown rate: should not happen */
1574 default: tap->wr_rate = 0;
1575 }
1576 if (le16toh(head->flags) & 0x4)
1577 tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
1578
1579 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m);
1580 }
1581
1582 /* grab a reference to the source node */
1583 wh = mtod(m, struct ieee80211_frame *);
1584 ni = ieee80211_find_rxnode(ic, (struct ieee80211_frame_min *)wh);
1585
1586 /* send the frame to the 802.11 layer */
1587 ieee80211_input(ic, m, ni, stat->rssi, 0);
1588
1589 /* release node reference */
1590 ieee80211_free_node(ni);
1591 }
1592
1593 static void
wpi_tx_intr(struct wpi_softc * sc,struct wpi_rx_desc * desc)1594 wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc)
1595 {
1596 struct ifnet *ifp = sc->sc_ic.ic_ifp;
1597 struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3];
1598 struct wpi_tx_data *data = &ring->data[desc->idx];
1599 struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1);
1600 struct wpi_node *wn = (struct wpi_node *)data->ni;
1601
1602 DPRINTFN(4, ("tx done: qid=%d idx=%d retries=%d nkill=%d rate=%x "
1603 "duration=%d status=%x\n", desc->qid, desc->idx, stat->ntries,
1604 stat->nkill, stat->rate, le32toh(stat->duration),
1605 le32toh(stat->status)));
1606
1607 /*
1608 * Update rate control statistics for the node.
1609 * XXX we should not count mgmt frames since they're always sent at
1610 * the lowest available bit-rate.
1611 */
1612 wn->amn.amn_txcnt++;
1613 if (stat->ntries > 0) {
1614 DPRINTFN(3, ("tx intr ntries %d\n", stat->ntries));
1615 wn->amn.amn_retrycnt++;
1616 }
1617
1618 if ((le32toh(stat->status) & 0xff) != 1)
1619 ifp->if_oerrors++;
1620 else
1621 ifp->if_opackets++;
1622
1623 bus_dmamap_unload(sc->sc_dmat, data->map);
1624 m_freem(data->m);
1625 data->m = NULL;
1626 ieee80211_free_node(data->ni);
1627 data->ni = NULL;
1628
1629 ring->queued--;
1630
1631 sc->sc_tx_timer = 0;
1632 ifp->if_flags &= ~IFF_OACTIVE;
1633 wpi_start(ifp);
1634 }
1635
1636 static void
wpi_cmd_intr(struct wpi_softc * sc,struct wpi_rx_desc * desc)1637 wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc)
1638 {
1639 struct wpi_tx_ring *ring = &sc->cmdq;
1640 struct wpi_tx_data *data;
1641
1642 if ((desc->qid & 7) != 4)
1643 return; /* not a command ack */
1644
1645 data = &ring->data[desc->idx];
1646
1647 /* if the command was mapped in a mbuf, free it */
1648 if (data->m != NULL) {
1649 bus_dmamap_unload(sc->sc_dmat, data->map);
1650 m_freem(data->m);
1651 data->m = NULL;
1652 }
1653
1654 wakeup(&ring->cmd[desc->idx]);
1655 }
1656
1657 static void
wpi_notif_intr(struct wpi_softc * sc)1658 wpi_notif_intr(struct wpi_softc *sc)
1659 {
1660 struct ieee80211com *ic = &sc->sc_ic;
1661 struct ifnet *ifp = ic->ic_ifp;
1662 uint32_t hw;
1663
1664 bus_dmamap_sync(sc->sc_dmat, sc->shared_dma.map, 0,
1665 sizeof(struct wpi_shared), BUS_DMASYNC_POSTREAD);
1666
1667 hw = le32toh(sc->shared->next);
1668 while (sc->rxq.cur != hw) {
1669 struct wpi_rx_data *data = &sc->rxq.data[sc->rxq.cur];
1670 struct wpi_rx_desc *desc;
1671
1672 bus_dmamap_sync(sc->sc_dmat, data->map, 0, data->map->dm_mapsize,
1673 BUS_DMASYNC_POSTREAD);
1674 desc = mtod(data->m, struct wpi_rx_desc *);
1675
1676 DPRINTFN(4, ("rx notification qid=%x idx=%d flags=%x type=%d "
1677 "len=%d\n", desc->qid, desc->idx, desc->flags,
1678 desc->type, le32toh(desc->len)));
1679
1680 if (!(desc->qid & 0x80)) /* reply to a command */
1681 wpi_cmd_intr(sc, desc);
1682
1683 switch (desc->type) {
1684 case WPI_RX_DONE:
1685 /* a 802.11 frame was received */
1686 wpi_rx_intr(sc, desc, data);
1687 break;
1688
1689 case WPI_TX_DONE:
1690 /* a 802.11 frame has been transmitted */
1691 wpi_tx_intr(sc, desc);
1692 break;
1693
1694 case WPI_UC_READY:
1695 {
1696 struct wpi_ucode_info *uc =
1697 (struct wpi_ucode_info *)(desc + 1);
1698
1699 /* the microcontroller is ready */
1700 DPRINTF(("microcode alive notification version %x "
1701 "alive %x\n", le32toh(uc->version),
1702 le32toh(uc->valid)));
1703
1704 if (le32toh(uc->valid) != 1) {
1705 aprint_error_dev(sc->sc_dev,
1706 "microcontroller initialization failed\n");
1707 }
1708 break;
1709 }
1710 case WPI_STATE_CHANGED:
1711 {
1712 uint32_t *status = (uint32_t *)(desc + 1);
1713
1714 /* enabled/disabled notification */
1715 DPRINTF(("state changed to %x\n", le32toh(*status)));
1716
1717 if (le32toh(*status) & 1) {
1718 /* the radio button has to be pushed */
1719 /* wake up thread to signal powerd */
1720 cv_signal(&sc->sc_rsw_cv);
1721 aprint_error_dev(sc->sc_dev,
1722 "Radio transmitter is off\n");
1723 /* turn the interface down */
1724 ifp->if_flags &= ~IFF_UP;
1725 wpi_stop(ifp, 1);
1726 return; /* no further processing */
1727 }
1728 break;
1729 }
1730 case WPI_START_SCAN:
1731 {
1732 #if 0
1733 struct wpi_start_scan *scan =
1734 (struct wpi_start_scan *)(desc + 1);
1735
1736 DPRINTFN(2, ("scanning channel %d status %x\n",
1737 scan->chan, le32toh(scan->status)));
1738
1739 /* fix current channel */
1740 ic->ic_curchan = &ic->ic_channels[scan->chan];
1741 #endif
1742 break;
1743 }
1744 case WPI_STOP_SCAN:
1745 {
1746 #ifdef WPI_DEBUG
1747 struct wpi_stop_scan *scan =
1748 (struct wpi_stop_scan *)(desc + 1);
1749 #endif
1750
1751 DPRINTF(("scan finished nchan=%d status=%d chan=%d\n",
1752 scan->nchan, scan->status, scan->chan));
1753
1754 sc->is_scanning = false;
1755 if (ic->ic_state == IEEE80211_S_SCAN)
1756 ieee80211_next_scan(ic);
1757
1758 break;
1759 }
1760 }
1761
1762 sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT;
1763 }
1764
1765 /* tell the firmware what we have processed */
1766 hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1;
1767 WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7);
1768 }
1769
1770 static int
wpi_intr(void * arg)1771 wpi_intr(void *arg)
1772 {
1773 struct wpi_softc *sc = arg;
1774 struct ifnet *ifp = sc->sc_ic.ic_ifp;
1775 uint32_t r;
1776
1777 r = WPI_READ(sc, WPI_INTR);
1778 if (r == 0 || r == 0xffffffff)
1779 return 0; /* not for us */
1780
1781 DPRINTFN(6, ("interrupt reg %x\n", r));
1782
1783 /* disable interrupts */
1784 WPI_WRITE(sc, WPI_MASK, 0);
1785 /* ack interrupts */
1786 WPI_WRITE(sc, WPI_INTR, r);
1787
1788 if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) {
1789 /* SYSTEM FAILURE, SYSTEM FAILURE */
1790 aprint_error_dev(sc->sc_dev, "fatal firmware error\n");
1791 ifp->if_flags &= ~IFF_UP;
1792 wpi_stop(ifp, 1);
1793 return 1;
1794 }
1795
1796 if (r & WPI_RX_INTR)
1797 wpi_notif_intr(sc);
1798
1799 if (r & WPI_ALIVE_INTR) /* firmware initialized */
1800 wakeup(sc);
1801
1802 /* re-enable interrupts */
1803 if (ifp->if_flags & IFF_UP)
1804 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK);
1805
1806 return 1;
1807 }
1808
1809 static uint8_t
wpi_plcp_signal(int rate)1810 wpi_plcp_signal(int rate)
1811 {
1812 switch (rate) {
1813 /* CCK rates (returned values are device-dependent) */
1814 case 2: return 10;
1815 case 4: return 20;
1816 case 11: return 55;
1817 case 22: return 110;
1818
1819 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */
1820 /* R1-R4, (u)ral is R4-R1 */
1821 case 12: return 0xd;
1822 case 18: return 0xf;
1823 case 24: return 0x5;
1824 case 36: return 0x7;
1825 case 48: return 0x9;
1826 case 72: return 0xb;
1827 case 96: return 0x1;
1828 case 108: return 0x3;
1829
1830 /* unsupported rates (should not get there) */
1831 default: return 0;
1832 }
1833 }
1834
1835 /* quickly determine if a given rate is CCK or OFDM */
1836 #define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22)
1837
1838 static int
wpi_tx_data(struct wpi_softc * sc,struct mbuf * m0,struct ieee80211_node * ni,int ac)1839 wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni,
1840 int ac)
1841 {
1842 struct ieee80211com *ic = &sc->sc_ic;
1843 struct wpi_tx_ring *ring = &sc->txq[ac];
1844 struct wpi_tx_desc *desc;
1845 struct wpi_tx_data *data;
1846 struct wpi_tx_cmd *cmd;
1847 struct wpi_cmd_data *tx;
1848 struct ieee80211_frame *wh;
1849 struct ieee80211_key *k;
1850 const struct chanAccParams *cap;
1851 struct mbuf *mnew;
1852 int i, rate, error, hdrlen, noack = 0;
1853
1854 desc = &ring->desc[ring->cur];
1855 data = &ring->data[ring->cur];
1856
1857 wh = mtod(m0, struct ieee80211_frame *);
1858
1859 if (ieee80211_has_qos(wh)) {
1860 cap = &ic->ic_wme.wme_chanParams;
1861 noack = cap->cap_wmeParams[ac].wmep_noackPolicy;
1862 }
1863
1864 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1865 k = ieee80211_crypto_encap(ic, ni, m0);
1866 if (k == NULL) {
1867 m_freem(m0);
1868 return ENOBUFS;
1869 }
1870
1871 /* packet header may have moved, reset our local pointer */
1872 wh = mtod(m0, struct ieee80211_frame *);
1873 }
1874
1875 hdrlen = ieee80211_anyhdrsize(wh);
1876
1877 /* pickup a rate */
1878 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) ==
1879 IEEE80211_FC0_TYPE_MGT) {
1880 /* mgmt frames are sent at the lowest available bit-rate */
1881 rate = ni->ni_rates.rs_rates[0];
1882 } else {
1883 if (ic->ic_fixed_rate != -1) {
1884 rate = ic->ic_sup_rates[ic->ic_curmode].
1885 rs_rates[ic->ic_fixed_rate];
1886 } else
1887 rate = ni->ni_rates.rs_rates[ni->ni_txrate];
1888 }
1889 rate &= IEEE80211_RATE_VAL;
1890
1891 if (sc->sc_drvbpf != NULL) {
1892 struct wpi_tx_radiotap_header *tap = &sc->sc_txtap;
1893
1894 tap->wt_flags = 0;
1895 tap->wt_chan_freq = htole16(ni->ni_chan->ic_freq);
1896 tap->wt_chan_flags = htole16(ni->ni_chan->ic_flags);
1897 tap->wt_rate = rate;
1898 tap->wt_hwqueue = ac;
1899 if (wh->i_fc[1] & IEEE80211_FC1_WEP)
1900 tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP;
1901
1902 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0);
1903 }
1904
1905 cmd = &ring->cmd[ring->cur];
1906 cmd->code = WPI_CMD_TX_DATA;
1907 cmd->flags = 0;
1908 cmd->qid = ring->qid;
1909 cmd->idx = ring->cur;
1910
1911 tx = (struct wpi_cmd_data *)cmd->data;
1912 /* no need to zero tx, all fields are reinitialized here */
1913 tx->flags = 0;
1914
1915 if (!noack && !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1916 tx->flags |= htole32(WPI_TX_NEED_ACK);
1917 } else if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > ic->ic_rtsthreshold)
1918 tx->flags |= htole32(WPI_TX_NEED_RTS | WPI_TX_FULL_TXOP);
1919
1920 tx->flags |= htole32(WPI_TX_AUTO_SEQ);
1921
1922 /* retrieve destination node's id */
1923 tx->id = IEEE80211_IS_MULTICAST(wh->i_addr1) ? WPI_ID_BROADCAST :
1924 WPI_ID_BSS;
1925
1926 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) ==
1927 IEEE80211_FC0_TYPE_MGT) {
1928 /* tell h/w to set timestamp in probe responses */
1929 if ((wh->i_fc[0] &
1930 (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) ==
1931 (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP))
1932 tx->flags |= htole32(WPI_TX_INSERT_TSTAMP);
1933
1934 if (((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) ==
1935 IEEE80211_FC0_SUBTYPE_ASSOC_REQ) ||
1936 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) ==
1937 IEEE80211_FC0_SUBTYPE_REASSOC_REQ))
1938 tx->timeout = htole16(3);
1939 else
1940 tx->timeout = htole16(2);
1941 } else
1942 tx->timeout = htole16(0);
1943
1944 tx->rate = wpi_plcp_signal(rate);
1945
1946 /* be very persistant at sending frames out */
1947 tx->rts_ntries = 7;
1948 tx->data_ntries = 15;
1949
1950 tx->ofdm_mask = 0xff;
1951 tx->cck_mask = 0x0f;
1952 tx->lifetime = htole32(WPI_LIFETIME_INFINITE);
1953
1954 tx->len = htole16(m0->m_pkthdr.len);
1955
1956 /* save and trim IEEE802.11 header */
1957 memcpy((uint8_t *)(tx + 1), wh, hdrlen);
1958 m_adj(m0, hdrlen);
1959
1960 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0,
1961 BUS_DMA_WRITE | BUS_DMA_NOWAIT);
1962 if (error != 0 && error != EFBIG) {
1963 aprint_error_dev(sc->sc_dev, "could not map mbuf (error %d)\n",
1964 error);
1965 m_freem(m0);
1966 return error;
1967 }
1968 if (error != 0) {
1969 /* too many fragments, linearize */
1970
1971 MGETHDR(mnew, M_DONTWAIT, MT_DATA);
1972 if (mnew == NULL) {
1973 m_freem(m0);
1974 return ENOMEM;
1975 }
1976 M_COPY_PKTHDR(mnew, m0);
1977 if (m0->m_pkthdr.len > MHLEN) {
1978 MCLGET(mnew, M_DONTWAIT);
1979 if (!(mnew->m_flags & M_EXT)) {
1980 m_freem(m0);
1981 m_freem(mnew);
1982 return ENOMEM;
1983 }
1984 }
1985
1986 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(mnew, void *));
1987 m_freem(m0);
1988 mnew->m_len = mnew->m_pkthdr.len;
1989 m0 = mnew;
1990
1991 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0,
1992 BUS_DMA_WRITE | BUS_DMA_NOWAIT);
1993 if (error != 0) {
1994 aprint_error_dev(sc->sc_dev,
1995 "could not map mbuf (error %d)\n", error);
1996 m_freem(m0);
1997 return error;
1998 }
1999 }
2000
2001 data->m = m0;
2002 data->ni = ni;
2003
2004 DPRINTFN(4, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n",
2005 ring->qid, ring->cur, m0->m_pkthdr.len, data->map->dm_nsegs));
2006
2007 /* first scatter/gather segment is used by the tx data command */
2008 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 |
2009 (1 + data->map->dm_nsegs) << 24);
2010 desc->segs[0].addr = htole32(ring->cmd_dma.paddr +
2011 ring->cur * sizeof (struct wpi_tx_cmd));
2012 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data) +
2013 ((hdrlen + 3) & ~3));
2014 for (i = 1; i <= data->map->dm_nsegs; i++) {
2015 desc->segs[i].addr =
2016 htole32(data->map->dm_segs[i - 1].ds_addr);
2017 desc->segs[i].len =
2018 htole32(data->map->dm_segs[i - 1].ds_len);
2019 }
2020
2021 ring->queued++;
2022
2023 bus_dmamap_sync(sc->sc_dmat, data->map, 0,
2024 data->map->dm_mapsize,
2025 BUS_DMASYNC_PREWRITE);
2026 bus_dmamap_sync(sc->sc_dmat, ring->cmd_dma.map, 0,
2027 ring->cmd_dma.size,
2028 BUS_DMASYNC_PREWRITE);
2029 bus_dmamap_sync(sc->sc_dmat, ring->desc_dma.map, 0,
2030 ring->desc_dma.size,
2031 BUS_DMASYNC_PREWRITE);
2032
2033 /* kick ring */
2034 ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT;
2035 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2036
2037 return 0;
2038 }
2039
2040 static void
wpi_start(struct ifnet * ifp)2041 wpi_start(struct ifnet *ifp)
2042 {
2043 struct wpi_softc *sc = ifp->if_softc;
2044 struct ieee80211com *ic = &sc->sc_ic;
2045 struct ieee80211_node *ni;
2046 struct ether_header *eh;
2047 struct mbuf *m0;
2048 int ac;
2049
2050 /*
2051 * net80211 may still try to send management frames even if the
2052 * IFF_RUNNING flag is not set...
2053 */
2054 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
2055 return;
2056
2057 for (;;) {
2058 IF_DEQUEUE(&ic->ic_mgtq, m0);
2059 if (m0 != NULL) {
2060
2061 ni = M_GETCTX(m0, struct ieee80211_node *);
2062 M_CLEARCTX(m0);
2063
2064 /* management frames go into ring 0 */
2065 if (sc->txq[0].queued > sc->txq[0].count - 8) {
2066 ifp->if_oerrors++;
2067 continue;
2068 }
2069 bpf_mtap3(ic->ic_rawbpf, m0);
2070 if (wpi_tx_data(sc, m0, ni, 0) != 0) {
2071 ifp->if_oerrors++;
2072 break;
2073 }
2074 } else {
2075 if (ic->ic_state != IEEE80211_S_RUN)
2076 break;
2077 IFQ_POLL(&ifp->if_snd, m0);
2078 if (m0 == NULL)
2079 break;
2080
2081 if (m0->m_len < sizeof (*eh) &&
2082 (m0 = m_pullup(m0, sizeof (*eh))) == NULL) {
2083 ifp->if_oerrors++;
2084 continue;
2085 }
2086 eh = mtod(m0, struct ether_header *);
2087 ni = ieee80211_find_txnode(ic, eh->ether_dhost);
2088 if (ni == NULL) {
2089 m_freem(m0);
2090 ifp->if_oerrors++;
2091 continue;
2092 }
2093
2094 /* classify mbuf so we can find which tx ring to use */
2095 if (ieee80211_classify(ic, m0, ni) != 0) {
2096 m_freem(m0);
2097 ieee80211_free_node(ni);
2098 ifp->if_oerrors++;
2099 continue;
2100 }
2101
2102 /* no QoS encapsulation for EAPOL frames */
2103 ac = (eh->ether_type != htons(ETHERTYPE_PAE)) ?
2104 M_WME_GETAC(m0) : WME_AC_BE;
2105
2106 if (sc->txq[ac].queued > sc->txq[ac].count - 8) {
2107 /* there is no place left in this ring */
2108 ifp->if_flags |= IFF_OACTIVE;
2109 break;
2110 }
2111 IFQ_DEQUEUE(&ifp->if_snd, m0);
2112 bpf_mtap(ifp, m0);
2113 m0 = ieee80211_encap(ic, m0, ni);
2114 if (m0 == NULL) {
2115 ieee80211_free_node(ni);
2116 ifp->if_oerrors++;
2117 continue;
2118 }
2119 bpf_mtap3(ic->ic_rawbpf, m0);
2120 if (wpi_tx_data(sc, m0, ni, ac) != 0) {
2121 ieee80211_free_node(ni);
2122 ifp->if_oerrors++;
2123 break;
2124 }
2125 }
2126
2127 sc->sc_tx_timer = 5;
2128 ifp->if_timer = 1;
2129 }
2130 }
2131
2132 static void
wpi_watchdog(struct ifnet * ifp)2133 wpi_watchdog(struct ifnet *ifp)
2134 {
2135 struct wpi_softc *sc = ifp->if_softc;
2136
2137 ifp->if_timer = 0;
2138
2139 if (sc->sc_tx_timer > 0) {
2140 if (--sc->sc_tx_timer == 0) {
2141 aprint_error_dev(sc->sc_dev, "device timeout\n");
2142 ifp->if_flags &= ~IFF_UP;
2143 wpi_stop(ifp, 1);
2144 ifp->if_oerrors++;
2145 return;
2146 }
2147 ifp->if_timer = 1;
2148 }
2149
2150 ieee80211_watchdog(&sc->sc_ic);
2151 }
2152
2153 static int
wpi_ioctl(struct ifnet * ifp,u_long cmd,void * data)2154 wpi_ioctl(struct ifnet *ifp, u_long cmd, void *data)
2155 {
2156 #define IS_RUNNING(ifp) \
2157 ((ifp->if_flags & IFF_UP) && (ifp->if_flags & IFF_RUNNING))
2158
2159 struct wpi_softc *sc = ifp->if_softc;
2160 struct ieee80211com *ic = &sc->sc_ic;
2161 int s, error = 0;
2162
2163 s = splnet();
2164
2165 switch (cmd) {
2166 case SIOCSIFFLAGS:
2167 if ((error = ifioctl_common(ifp, cmd, data)) != 0)
2168 break;
2169 if (ifp->if_flags & IFF_UP) {
2170 if (!(ifp->if_flags & IFF_RUNNING))
2171 wpi_init(ifp);
2172 } else {
2173 if (ifp->if_flags & IFF_RUNNING)
2174 wpi_stop(ifp, 1);
2175 }
2176 break;
2177
2178 case SIOCADDMULTI:
2179 case SIOCDELMULTI:
2180 /* XXX no h/w multicast filter? --dyoung */
2181 if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) {
2182 /* setup multicast filter, etc */
2183 error = 0;
2184 }
2185 break;
2186
2187 default:
2188 error = ieee80211_ioctl(ic, cmd, data);
2189 }
2190
2191 if (error == ENETRESET) {
2192 if (IS_RUNNING(ifp) &&
2193 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL))
2194 wpi_init(ifp);
2195 error = 0;
2196 }
2197
2198 splx(s);
2199 return error;
2200
2201 #undef IS_RUNNING
2202 }
2203
2204 /*
2205 * Extract various information from EEPROM.
2206 */
2207 static void
wpi_read_eeprom(struct wpi_softc * sc)2208 wpi_read_eeprom(struct wpi_softc *sc)
2209 {
2210 struct ieee80211com *ic = &sc->sc_ic;
2211 char domain[4];
2212 int i;
2213
2214 wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap, 1);
2215 wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev, 2);
2216 wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1);
2217
2218 DPRINTF(("cap=%x rev=%x type=%x\n", sc->cap, le16toh(sc->rev),
2219 sc->type));
2220
2221 /* read and print regulatory domain */
2222 wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, domain, 4);
2223 aprint_normal_dev(sc->sc_dev, "%.4s", domain);
2224
2225 /* read and print MAC address */
2226 wpi_read_prom_data(sc, WPI_EEPROM_MAC, ic->ic_myaddr, 6);
2227 aprint_normal(", address %s\n", ether_sprintf(ic->ic_myaddr));
2228
2229 /* read the list of authorized channels */
2230 for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++)
2231 wpi_read_eeprom_channels(sc, i);
2232
2233 /* read the list of power groups */
2234 for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++)
2235 wpi_read_eeprom_group(sc, i);
2236 }
2237
2238 static void
wpi_read_eeprom_channels(struct wpi_softc * sc,int n)2239 wpi_read_eeprom_channels(struct wpi_softc *sc, int n)
2240 {
2241 struct ieee80211com *ic = &sc->sc_ic;
2242 const struct wpi_chan_band *band = &wpi_bands[n];
2243 struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND];
2244 int chan, i;
2245
2246 wpi_read_prom_data(sc, band->addr, channels,
2247 band->nchan * sizeof (struct wpi_eeprom_chan));
2248
2249 for (i = 0; i < band->nchan; i++) {
2250 if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID))
2251 continue;
2252
2253 chan = band->chan[i];
2254
2255 if (n == 0) { /* 2GHz band */
2256 ic->ic_channels[chan].ic_freq =
2257 ieee80211_ieee2mhz(chan, IEEE80211_CHAN_2GHZ);
2258 ic->ic_channels[chan].ic_flags =
2259 IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM |
2260 IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ;
2261
2262 } else { /* 5GHz band */
2263 /*
2264 * Some 3945ABG adapters support channels 7, 8, 11
2265 * and 12 in the 2GHz *and* 5GHz bands.
2266 * Because of limitations in our net80211(9) stack,
2267 * we can't support these channels in 5GHz band.
2268 */
2269 if (chan <= 14)
2270 continue;
2271
2272 ic->ic_channels[chan].ic_freq =
2273 ieee80211_ieee2mhz(chan, IEEE80211_CHAN_5GHZ);
2274 ic->ic_channels[chan].ic_flags = IEEE80211_CHAN_A;
2275 }
2276
2277 /* is active scan allowed on this channel? */
2278 if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) {
2279 ic->ic_channels[chan].ic_flags |=
2280 IEEE80211_CHAN_PASSIVE;
2281 }
2282
2283 /* save maximum allowed power for this channel */
2284 sc->maxpwr[chan] = channels[i].maxpwr;
2285
2286 DPRINTF(("adding chan %d flags=0x%x maxpwr=%d\n",
2287 chan, channels[i].flags, sc->maxpwr[chan]));
2288 }
2289 }
2290
2291 static void
wpi_read_eeprom_group(struct wpi_softc * sc,int n)2292 wpi_read_eeprom_group(struct wpi_softc *sc, int n)
2293 {
2294 struct wpi_power_group *group = &sc->groups[n];
2295 struct wpi_eeprom_group rgroup;
2296 int i;
2297
2298 wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup,
2299 sizeof rgroup);
2300
2301 /* save power group information */
2302 group->chan = rgroup.chan;
2303 group->maxpwr = rgroup.maxpwr;
2304 /* temperature at which the samples were taken */
2305 group->temp = (int16_t)le16toh(rgroup.temp);
2306
2307 DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n,
2308 group->chan, group->maxpwr, group->temp));
2309
2310 for (i = 0; i < WPI_SAMPLES_COUNT; i++) {
2311 group->samples[i].index = rgroup.samples[i].index;
2312 group->samples[i].power = rgroup.samples[i].power;
2313
2314 DPRINTF(("\tsample %d: index=%d power=%d\n", i,
2315 group->samples[i].index, group->samples[i].power));
2316 }
2317 }
2318
2319 /*
2320 * Send a command to the firmware.
2321 */
2322 static int
wpi_cmd(struct wpi_softc * sc,int code,const void * buf,int size,int async)2323 wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async)
2324 {
2325 struct wpi_tx_ring *ring = &sc->cmdq;
2326 struct wpi_tx_desc *desc;
2327 struct wpi_tx_cmd *cmd;
2328 struct wpi_dma_info *dma;
2329
2330 KASSERT(size <= sizeof cmd->data);
2331
2332 desc = &ring->desc[ring->cur];
2333 cmd = &ring->cmd[ring->cur];
2334
2335 cmd->code = code;
2336 cmd->flags = 0;
2337 cmd->qid = ring->qid;
2338 cmd->idx = ring->cur;
2339 memcpy(cmd->data, buf, size);
2340
2341 dma = &ring->cmd_dma;
2342 bus_dmamap_sync(dma->tag, dma->map, 0, dma->size, BUS_DMASYNC_PREWRITE);
2343
2344 desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24);
2345 desc->segs[0].addr = htole32(ring->cmd_dma.paddr +
2346 ring->cur * sizeof (struct wpi_tx_cmd));
2347 desc->segs[0].len = htole32(4 + size);
2348
2349 dma = &ring->desc_dma;
2350 bus_dmamap_sync(dma->tag, dma->map, 0, dma->size, BUS_DMASYNC_PREWRITE);
2351
2352 /* kick cmd ring */
2353 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT;
2354 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2355
2356 return async ? 0 : tsleep(cmd, PCATCH, "wpicmd", hz);
2357 }
2358
2359 static int
wpi_wme_update(struct ieee80211com * ic)2360 wpi_wme_update(struct ieee80211com *ic)
2361 {
2362 #define WPI_EXP2(v) htole16((1 << (v)) - 1)
2363 #define WPI_USEC(v) htole16(IEEE80211_TXOP_TO_US(v))
2364 struct wpi_softc *sc = ic->ic_ifp->if_softc;
2365 const struct wmeParams *wmep;
2366 struct wpi_wme_setup wme;
2367 int ac;
2368
2369 /* don't override default WME values if WME is not actually enabled */
2370 if (!(ic->ic_flags & IEEE80211_F_WME))
2371 return 0;
2372
2373 wme.flags = 0;
2374 for (ac = 0; ac < WME_NUM_AC; ac++) {
2375 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac];
2376 wme.ac[ac].aifsn = wmep->wmep_aifsn;
2377 wme.ac[ac].cwmin = WPI_EXP2(wmep->wmep_logcwmin);
2378 wme.ac[ac].cwmax = WPI_EXP2(wmep->wmep_logcwmax);
2379 wme.ac[ac].txop = WPI_USEC(wmep->wmep_txopLimit);
2380
2381 DPRINTF(("setting WME for queue %d aifsn=%d cwmin=%d cwmax=%d "
2382 "txop=%d\n", ac, wme.ac[ac].aifsn, wme.ac[ac].cwmin,
2383 wme.ac[ac].cwmax, wme.ac[ac].txop));
2384 }
2385
2386 return wpi_cmd(sc, WPI_CMD_SET_WME, &wme, sizeof wme, 1);
2387 #undef WPI_USEC
2388 #undef WPI_EXP2
2389 }
2390
2391 /*
2392 * Configure h/w multi-rate retries.
2393 */
2394 static int
wpi_mrr_setup(struct wpi_softc * sc)2395 wpi_mrr_setup(struct wpi_softc *sc)
2396 {
2397 struct ieee80211com *ic = &sc->sc_ic;
2398 struct wpi_mrr_setup mrr;
2399 int i, error;
2400
2401 /* CCK rates (not used with 802.11a) */
2402 for (i = WPI_CCK1; i <= WPI_CCK11; i++) {
2403 mrr.rates[i].flags = 0;
2404 mrr.rates[i].plcp = wpi_ridx_to_plcp[i];
2405 /* fallback to the immediate lower CCK rate (if any) */
2406 mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1;
2407 /* try one time at this rate before falling back to "next" */
2408 mrr.rates[i].ntries = 1;
2409 }
2410
2411 /* OFDM rates (not used with 802.11b) */
2412 for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) {
2413 mrr.rates[i].flags = 0;
2414 mrr.rates[i].plcp = wpi_ridx_to_plcp[i];
2415 /* fallback to the immediate lower rate (if any) */
2416 /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */
2417 mrr.rates[i].next = (i == WPI_OFDM6) ?
2418 ((ic->ic_curmode == IEEE80211_MODE_11A) ?
2419 WPI_OFDM6 : WPI_CCK2) :
2420 i - 1;
2421 /* try one time at this rate before falling back to "next" */
2422 mrr.rates[i].ntries = 1;
2423 }
2424
2425 /* setup MRR for control frames */
2426 mrr.which = htole32(WPI_MRR_CTL);
2427 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0);
2428 if (error != 0) {
2429 aprint_error_dev(sc->sc_dev,
2430 "could not setup MRR for control frames\n");
2431 return error;
2432 }
2433
2434 /* setup MRR for data frames */
2435 mrr.which = htole32(WPI_MRR_DATA);
2436 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0);
2437 if (error != 0) {
2438 aprint_error_dev(sc->sc_dev,
2439 "could not setup MRR for data frames\n");
2440 return error;
2441 }
2442
2443 return 0;
2444 }
2445
2446 static void
wpi_set_led(struct wpi_softc * sc,uint8_t which,uint8_t off,uint8_t on)2447 wpi_set_led(struct wpi_softc *sc, uint8_t which, uint8_t off, uint8_t on)
2448 {
2449 struct wpi_cmd_led led;
2450
2451 led.which = which;
2452 led.unit = htole32(100000); /* on/off in unit of 100ms */
2453 led.off = off;
2454 led.on = on;
2455
2456 (void)wpi_cmd(sc, WPI_CMD_SET_LED, &led, sizeof led, 1);
2457 }
2458
2459 static void
wpi_enable_tsf(struct wpi_softc * sc,struct ieee80211_node * ni)2460 wpi_enable_tsf(struct wpi_softc *sc, struct ieee80211_node *ni)
2461 {
2462 struct wpi_cmd_tsf tsf;
2463 uint64_t val, mod;
2464
2465 memset(&tsf, 0, sizeof tsf);
2466 memcpy(&tsf.tstamp, ni->ni_tstamp.data, sizeof (uint64_t));
2467 tsf.bintval = htole16(ni->ni_intval);
2468 tsf.lintval = htole16(10);
2469
2470 /* compute remaining time until next beacon */
2471 val = (uint64_t)ni->ni_intval * 1024; /* msecs -> usecs */
2472 mod = le64toh(tsf.tstamp) % val;
2473 tsf.binitval = htole32((uint32_t)(val - mod));
2474
2475 DPRINTF(("TSF bintval=%u tstamp=%" PRIu64 ", init=%u\n",
2476 ni->ni_intval, le64toh(tsf.tstamp), (uint32_t)(val - mod)));
2477
2478 if (wpi_cmd(sc, WPI_CMD_TSF, &tsf, sizeof tsf, 1) != 0)
2479 aprint_error_dev(sc->sc_dev, "could not enable TSF\n");
2480 }
2481
2482 /*
2483 * Update Tx power to match what is defined for channel `c'.
2484 */
2485 static int
wpi_set_txpower(struct wpi_softc * sc,struct ieee80211_channel * c,int async)2486 wpi_set_txpower(struct wpi_softc *sc, struct ieee80211_channel *c, int async)
2487 {
2488 struct ieee80211com *ic = &sc->sc_ic;
2489 struct wpi_power_group *group;
2490 struct wpi_cmd_txpower txpower;
2491 u_int chan;
2492 int i;
2493
2494 /* get channel number */
2495 chan = ieee80211_chan2ieee(ic, c);
2496
2497 /* find the power group to which this channel belongs */
2498 if (IEEE80211_IS_CHAN_5GHZ(c)) {
2499 for (group = &sc->groups[1]; group < &sc->groups[4]; group++)
2500 if (chan <= group->chan)
2501 break;
2502 } else
2503 group = &sc->groups[0];
2504
2505 memset(&txpower, 0, sizeof txpower);
2506 txpower.band = IEEE80211_IS_CHAN_5GHZ(c) ? 0 : 1;
2507 txpower.chan = htole16(chan);
2508
2509 /* set Tx power for all OFDM and CCK rates */
2510 for (i = 0; i <= 11 ; i++) {
2511 /* retrieve Tx power for this channel/rate combination */
2512 int idx = wpi_get_power_index(sc, group, c,
2513 wpi_ridx_to_rate[i]);
2514
2515 txpower.rates[i].plcp = wpi_ridx_to_plcp[i];
2516
2517 if (IEEE80211_IS_CHAN_5GHZ(c)) {
2518 txpower.rates[i].rf_gain = wpi_rf_gain_5ghz[idx];
2519 txpower.rates[i].dsp_gain = wpi_dsp_gain_5ghz[idx];
2520 } else {
2521 txpower.rates[i].rf_gain = wpi_rf_gain_2ghz[idx];
2522 txpower.rates[i].dsp_gain = wpi_dsp_gain_2ghz[idx];
2523 }
2524 DPRINTF(("chan %d/rate %d: power index %d\n", chan,
2525 wpi_ridx_to_rate[i], idx));
2526 }
2527
2528 return wpi_cmd(sc, WPI_CMD_TXPOWER, &txpower, sizeof txpower, async);
2529 }
2530
2531 /*
2532 * Determine Tx power index for a given channel/rate combination.
2533 * This takes into account the regulatory information from EEPROM and the
2534 * current temperature.
2535 */
2536 static int
wpi_get_power_index(struct wpi_softc * sc,struct wpi_power_group * group,struct ieee80211_channel * c,int rate)2537 wpi_get_power_index(struct wpi_softc *sc, struct wpi_power_group *group,
2538 struct ieee80211_channel *c, int rate)
2539 {
2540 /* fixed-point arithmetic division using a n-bit fractional part */
2541 #define fdivround(a, b, n) \
2542 ((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n))
2543
2544 /* linear interpolation */
2545 #define interpolate(x, x1, y1, x2, y2, n) \
2546 ((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n))
2547
2548 struct ieee80211com *ic = &sc->sc_ic;
2549 struct wpi_power_sample *sample;
2550 int pwr, idx;
2551 u_int chan;
2552
2553 /* get channel number */
2554 chan = ieee80211_chan2ieee(ic, c);
2555
2556 /* default power is group's maximum power - 3dB */
2557 pwr = group->maxpwr / 2;
2558
2559 /* decrease power for highest OFDM rates to reduce distortion */
2560 switch (rate) {
2561 case 72: /* 36Mb/s */
2562 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 0 : 5;
2563 break;
2564 case 96: /* 48Mb/s */
2565 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 7 : 10;
2566 break;
2567 case 108: /* 54Mb/s */
2568 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 9 : 12;
2569 break;
2570 }
2571
2572 /* never exceed channel's maximum allowed Tx power */
2573 pwr = min(pwr, sc->maxpwr[chan]);
2574
2575 /* retrieve power index into gain tables from samples */
2576 for (sample = group->samples; sample < &group->samples[3]; sample++)
2577 if (pwr > sample[1].power)
2578 break;
2579 /* fixed-point linear interpolation using a 19-bit fractional part */
2580 idx = interpolate(pwr, sample[0].power, sample[0].index,
2581 sample[1].power, sample[1].index, 19);
2582
2583 /*-
2584 * Adjust power index based on current temperature:
2585 * - if cooler than factory-calibrated: decrease output power
2586 * - if warmer than factory-calibrated: increase output power
2587 */
2588 idx -= (sc->temp - group->temp) * 11 / 100;
2589
2590 /* decrease power for CCK rates (-5dB) */
2591 if (!WPI_RATE_IS_OFDM(rate))
2592 idx += 10;
2593
2594 /* keep power index in a valid range */
2595 if (idx < 0)
2596 return 0;
2597 if (idx > WPI_MAX_PWR_INDEX)
2598 return WPI_MAX_PWR_INDEX;
2599 return idx;
2600
2601 #undef interpolate
2602 #undef fdivround
2603 }
2604
2605 /*
2606 * Build a beacon frame that the firmware will broadcast periodically in
2607 * IBSS or HostAP modes.
2608 */
2609 static int
wpi_setup_beacon(struct wpi_softc * sc,struct ieee80211_node * ni)2610 wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni)
2611 {
2612 struct ieee80211com *ic = &sc->sc_ic;
2613 struct wpi_tx_ring *ring = &sc->cmdq;
2614 struct wpi_tx_desc *desc;
2615 struct wpi_tx_data *data;
2616 struct wpi_tx_cmd *cmd;
2617 struct wpi_cmd_beacon *bcn;
2618 struct ieee80211_beacon_offsets bo;
2619 struct mbuf *m0;
2620 int error;
2621
2622 desc = &ring->desc[ring->cur];
2623 data = &ring->data[ring->cur];
2624
2625 m0 = ieee80211_beacon_alloc(ic, ni, &bo);
2626 if (m0 == NULL) {
2627 aprint_error_dev(sc->sc_dev,
2628 "could not allocate beacon frame\n");
2629 return ENOMEM;
2630 }
2631
2632 cmd = &ring->cmd[ring->cur];
2633 cmd->code = WPI_CMD_SET_BEACON;
2634 cmd->flags = 0;
2635 cmd->qid = ring->qid;
2636 cmd->idx = ring->cur;
2637
2638 bcn = (struct wpi_cmd_beacon *)cmd->data;
2639 memset(bcn, 0, sizeof (struct wpi_cmd_beacon));
2640 bcn->id = WPI_ID_BROADCAST;
2641 bcn->ofdm_mask = 0xff;
2642 bcn->cck_mask = 0x0f;
2643 bcn->lifetime = htole32(WPI_LIFETIME_INFINITE);
2644 bcn->len = htole16(m0->m_pkthdr.len);
2645 bcn->rate = (ic->ic_curmode == IEEE80211_MODE_11A) ?
2646 wpi_plcp_signal(12) : wpi_plcp_signal(2);
2647 bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP);
2648
2649 /* save and trim IEEE802.11 header */
2650 m_copydata(m0, 0, sizeof (struct ieee80211_frame), (void *)&bcn->wh);
2651 m_adj(m0, sizeof (struct ieee80211_frame));
2652
2653 /* assume beacon frame is contiguous */
2654 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0,
2655 BUS_DMA_READ | BUS_DMA_NOWAIT);
2656 if (error != 0) {
2657 aprint_error_dev(sc->sc_dev, "could not map beacon\n");
2658 m_freem(m0);
2659 return error;
2660 }
2661
2662 data->m = m0;
2663
2664 /* first scatter/gather segment is used by the beacon command */
2665 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24);
2666 desc->segs[0].addr = htole32(ring->cmd_dma.paddr +
2667 ring->cur * sizeof (struct wpi_tx_cmd));
2668 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon));
2669 desc->segs[1].addr = htole32(data->map->dm_segs[0].ds_addr);
2670 desc->segs[1].len = htole32(data->map->dm_segs[0].ds_len);
2671
2672 bus_dmamap_sync(sc->sc_dmat, ring->desc_dma.map, 0,
2673 ring->desc_dma.map->dm_mapsize, BUS_DMASYNC_PREWRITE);
2674 bus_dmamap_sync(sc->sc_dmat, data->map, 0, data->map->dm_mapsize,
2675 BUS_DMASYNC_PREWRITE);
2676
2677 /* kick cmd ring */
2678 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT;
2679 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2680
2681 return 0;
2682 }
2683
2684 static int
wpi_auth(struct wpi_softc * sc)2685 wpi_auth(struct wpi_softc *sc)
2686 {
2687 struct ieee80211com *ic = &sc->sc_ic;
2688 struct ieee80211_node *ni = ic->ic_bss;
2689 struct wpi_node_info node;
2690 int error;
2691
2692 /* update adapter's configuration */
2693 IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid);
2694 sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan);
2695 sc->config.flags = htole32(WPI_CONFIG_TSF);
2696 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) {
2697 sc->config.flags |= htole32(WPI_CONFIG_AUTO |
2698 WPI_CONFIG_24GHZ);
2699 }
2700 switch (ic->ic_curmode) {
2701 case IEEE80211_MODE_11A:
2702 sc->config.cck_mask = 0;
2703 sc->config.ofdm_mask = 0x15;
2704 break;
2705 case IEEE80211_MODE_11B:
2706 sc->config.cck_mask = 0x03;
2707 sc->config.ofdm_mask = 0;
2708 break;
2709 default: /* assume 802.11b/g */
2710 sc->config.cck_mask = 0x0f;
2711 sc->config.ofdm_mask = 0x15;
2712 }
2713 DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan,
2714 sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask));
2715 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config,
2716 sizeof (struct wpi_config), 1);
2717 if (error != 0) {
2718 aprint_error_dev(sc->sc_dev, "could not configure\n");
2719 return error;
2720 }
2721
2722 /* configuration has changed, set Tx power accordingly */
2723 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) {
2724 aprint_error_dev(sc->sc_dev, "could not set Tx power\n");
2725 return error;
2726 }
2727
2728 /* add default node */
2729 memset(&node, 0, sizeof node);
2730 IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid);
2731 node.id = WPI_ID_BSS;
2732 node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ?
2733 wpi_plcp_signal(12) : wpi_plcp_signal(2);
2734 node.action = htole32(WPI_ACTION_SET_RATE);
2735 node.antenna = WPI_ANTENNA_BOTH;
2736 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1);
2737 if (error != 0) {
2738 aprint_error_dev(sc->sc_dev, "could not add BSS node\n");
2739 return error;
2740 }
2741
2742 return 0;
2743 }
2744
2745 /*
2746 * Send a scan request to the firmware. Since this command is huge, we map it
2747 * into a mbuf instead of using the pre-allocated set of commands.
2748 */
2749 static int
wpi_scan(struct wpi_softc * sc)2750 wpi_scan(struct wpi_softc *sc)
2751 {
2752 struct ieee80211com *ic = &sc->sc_ic;
2753 struct wpi_tx_ring *ring = &sc->cmdq;
2754 struct wpi_tx_desc *desc;
2755 struct wpi_tx_data *data;
2756 struct wpi_tx_cmd *cmd;
2757 struct wpi_scan_hdr *hdr;
2758 struct wpi_scan_chan *chan;
2759 struct ieee80211_frame *wh;
2760 struct ieee80211_rateset *rs;
2761 struct ieee80211_channel *c;
2762 uint8_t *frm;
2763 int pktlen, error, nrates;
2764
2765 if (ic->ic_curchan == NULL)
2766 return EIO;
2767
2768 desc = &ring->desc[ring->cur];
2769 data = &ring->data[ring->cur];
2770
2771 MGETHDR(data->m, M_DONTWAIT, MT_DATA);
2772 if (data->m == NULL) {
2773 aprint_error_dev(sc->sc_dev,
2774 "could not allocate mbuf for scan command\n");
2775 return ENOMEM;
2776 }
2777 MCLGET(data->m, M_DONTWAIT);
2778 if (!(data->m->m_flags & M_EXT)) {
2779 m_freem(data->m);
2780 data->m = NULL;
2781 aprint_error_dev(sc->sc_dev,
2782 "could not allocate mbuf for scan command\n");
2783 return ENOMEM;
2784 }
2785
2786 cmd = mtod(data->m, struct wpi_tx_cmd *);
2787 cmd->code = WPI_CMD_SCAN;
2788 cmd->flags = 0;
2789 cmd->qid = ring->qid;
2790 cmd->idx = ring->cur;
2791
2792 hdr = (struct wpi_scan_hdr *)cmd->data;
2793 memset(hdr, 0, sizeof (struct wpi_scan_hdr));
2794 hdr->cmd.flags = htole32(WPI_TX_AUTO_SEQ);
2795 hdr->cmd.id = WPI_ID_BROADCAST;
2796 hdr->cmd.lifetime = htole32(WPI_LIFETIME_INFINITE);
2797 /*
2798 * Move to the next channel if no packets are received within 5 msecs
2799 * after sending the probe request (this helps to reduce the duration
2800 * of active scans).
2801 */
2802 hdr->quiet = htole16(5); /* timeout in milliseconds */
2803 hdr->plcp_threshold = htole16(1); /* min # of packets */
2804
2805 if (ic->ic_curchan->ic_flags & IEEE80211_CHAN_5GHZ) {
2806 hdr->crc_threshold = htole16(1);
2807 /* send probe requests at 6Mbps */
2808 hdr->cmd.rate = wpi_plcp_signal(12);
2809 rs = &ic->ic_sup_rates[IEEE80211_MODE_11A];
2810 } else {
2811 hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO);
2812 /* send probe requests at 1Mbps */
2813 hdr->cmd.rate = wpi_plcp_signal(2);
2814 rs = &ic->ic_sup_rates[IEEE80211_MODE_11G];
2815 }
2816
2817 /* for directed scans, firmware inserts the essid IE itself */
2818 if (ic->ic_des_esslen != 0) {
2819 hdr->essid[0].id = IEEE80211_ELEMID_SSID;
2820 hdr->essid[0].len = ic->ic_des_esslen;
2821 memcpy(hdr->essid[0].data, ic->ic_des_essid, ic->ic_des_esslen);
2822 }
2823
2824 /*
2825 * Build a probe request frame. Most of the following code is a
2826 * copy & paste of what is done in net80211.
2827 */
2828 wh = (struct ieee80211_frame *)(hdr + 1);
2829 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
2830 IEEE80211_FC0_SUBTYPE_PROBE_REQ;
2831 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2832 IEEE80211_ADDR_COPY(wh->i_addr1, etherbroadcastaddr);
2833 IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr);
2834 IEEE80211_ADDR_COPY(wh->i_addr3, etherbroadcastaddr);
2835 *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */
2836 *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */
2837
2838 frm = (uint8_t *)(wh + 1);
2839
2840 /* add empty essid IE (firmware generates it for directed scans) */
2841 *frm++ = IEEE80211_ELEMID_SSID;
2842 *frm++ = 0;
2843
2844 /* add supported rates IE */
2845 *frm++ = IEEE80211_ELEMID_RATES;
2846 nrates = rs->rs_nrates;
2847 if (nrates > IEEE80211_RATE_SIZE)
2848 nrates = IEEE80211_RATE_SIZE;
2849 *frm++ = nrates;
2850 memcpy(frm, rs->rs_rates, nrates);
2851 frm += nrates;
2852
2853 /* add supported xrates IE */
2854 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
2855 nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
2856 *frm++ = IEEE80211_ELEMID_XRATES;
2857 *frm++ = nrates;
2858 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
2859 frm += nrates;
2860 }
2861
2862 /* setup length of probe request */
2863 hdr->cmd.len = htole16(frm - (uint8_t *)wh);
2864
2865 chan = (struct wpi_scan_chan *)frm;
2866 c = ic->ic_curchan;
2867
2868 chan->chan = ieee80211_chan2ieee(ic, c);
2869 chan->flags = 0;
2870 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) {
2871 chan->flags |= WPI_CHAN_ACTIVE;
2872 if (ic->ic_des_esslen != 0)
2873 chan->flags |= WPI_CHAN_DIRECT;
2874 }
2875 chan->dsp_gain = 0x6e;
2876 if (IEEE80211_IS_CHAN_5GHZ(c)) {
2877 chan->rf_gain = 0x3b;
2878 chan->active = htole16(10);
2879 chan->passive = htole16(110);
2880 } else {
2881 chan->rf_gain = 0x28;
2882 chan->active = htole16(20);
2883 chan->passive = htole16(120);
2884 }
2885 hdr->nchan++;
2886 chan++;
2887
2888 frm += sizeof (struct wpi_scan_chan);
2889
2890 hdr->len = htole16(frm - (uint8_t *)hdr);
2891 pktlen = frm - (uint8_t *)cmd;
2892
2893 error = bus_dmamap_load(sc->sc_dmat, data->map, cmd, pktlen, NULL,
2894 BUS_DMA_NOWAIT);
2895 if (error != 0) {
2896 aprint_error_dev(sc->sc_dev, "could not map scan command\n");
2897 m_freem(data->m);
2898 data->m = NULL;
2899 return error;
2900 }
2901
2902 desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24);
2903 desc->segs[0].addr = htole32(data->map->dm_segs[0].ds_addr);
2904 desc->segs[0].len = htole32(data->map->dm_segs[0].ds_len);
2905
2906 bus_dmamap_sync(sc->sc_dmat, ring->desc_dma.map, 0,
2907 ring->desc_dma.map->dm_mapsize, BUS_DMASYNC_PREWRITE);
2908 bus_dmamap_sync(sc->sc_dmat, data->map, 0, data->map->dm_mapsize,
2909 BUS_DMASYNC_PREWRITE);
2910
2911 /* kick cmd ring */
2912 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT;
2913 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2914
2915 return 0; /* will be notified async. of failure/success */
2916 }
2917
2918 static int
wpi_config(struct wpi_softc * sc)2919 wpi_config(struct wpi_softc *sc)
2920 {
2921 struct ieee80211com *ic = &sc->sc_ic;
2922 struct ifnet *ifp = ic->ic_ifp;
2923 struct wpi_power power;
2924 struct wpi_bluetooth bluetooth;
2925 struct wpi_node_info node;
2926 int error;
2927
2928 memset(&power, 0, sizeof power);
2929 power.flags = htole32(WPI_POWER_CAM | 0x8);
2930 error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0);
2931 if (error != 0) {
2932 aprint_error_dev(sc->sc_dev, "could not set power mode\n");
2933 return error;
2934 }
2935
2936 /* configure bluetooth coexistence */
2937 memset(&bluetooth, 0, sizeof bluetooth);
2938 bluetooth.flags = 3;
2939 bluetooth.lead = 0xaa;
2940 bluetooth.kill = 1;
2941 error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth,
2942 0);
2943 if (error != 0) {
2944 aprint_error_dev(sc->sc_dev,
2945 "could not configure bluetooth coexistence\n");
2946 return error;
2947 }
2948
2949 /* configure adapter */
2950 memset(&sc->config, 0, sizeof (struct wpi_config));
2951 IEEE80211_ADDR_COPY(ic->ic_myaddr, CLLADDR(ifp->if_sadl));
2952 IEEE80211_ADDR_COPY(sc->config.myaddr, ic->ic_myaddr);
2953 /* set default channel */
2954 sc->config.chan = ieee80211_chan2ieee(ic, ic->ic_curchan);
2955 sc->config.flags = htole32(WPI_CONFIG_TSF);
2956 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) {
2957 sc->config.flags |= htole32(WPI_CONFIG_AUTO |
2958 WPI_CONFIG_24GHZ);
2959 }
2960 sc->config.filter = 0;
2961 switch (ic->ic_opmode) {
2962 case IEEE80211_M_STA:
2963 sc->config.mode = WPI_MODE_STA;
2964 sc->config.filter |= htole32(WPI_FILTER_MULTICAST);
2965 break;
2966 case IEEE80211_M_IBSS:
2967 case IEEE80211_M_AHDEMO:
2968 sc->config.mode = WPI_MODE_IBSS;
2969 break;
2970 case IEEE80211_M_HOSTAP:
2971 sc->config.mode = WPI_MODE_HOSTAP;
2972 break;
2973 case IEEE80211_M_MONITOR:
2974 sc->config.mode = WPI_MODE_MONITOR;
2975 sc->config.filter |= htole32(WPI_FILTER_MULTICAST |
2976 WPI_FILTER_CTL | WPI_FILTER_PROMISC);
2977 break;
2978 }
2979 sc->config.cck_mask = 0x0f; /* not yet negotiated */
2980 sc->config.ofdm_mask = 0xff; /* not yet negotiated */
2981 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config,
2982 sizeof (struct wpi_config), 0);
2983 if (error != 0) {
2984 aprint_error_dev(sc->sc_dev, "configure command failed\n");
2985 return error;
2986 }
2987
2988 /* configuration has changed, set Tx power accordingly */
2989 if ((error = wpi_set_txpower(sc, ic->ic_curchan, 0)) != 0) {
2990 aprint_error_dev(sc->sc_dev, "could not set Tx power\n");
2991 return error;
2992 }
2993
2994 /* add broadcast node */
2995 memset(&node, 0, sizeof node);
2996 IEEE80211_ADDR_COPY(node.bssid, etherbroadcastaddr);
2997 node.id = WPI_ID_BROADCAST;
2998 node.rate = wpi_plcp_signal(2);
2999 node.action = htole32(WPI_ACTION_SET_RATE);
3000 node.antenna = WPI_ANTENNA_BOTH;
3001 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0);
3002 if (error != 0) {
3003 aprint_error_dev(sc->sc_dev, "could not add broadcast node\n");
3004 return error;
3005 }
3006
3007 if ((error = wpi_mrr_setup(sc)) != 0) {
3008 aprint_error_dev(sc->sc_dev, "could not setup MRR\n");
3009 return error;
3010 }
3011
3012 return 0;
3013 }
3014
3015 static void
wpi_stop_master(struct wpi_softc * sc)3016 wpi_stop_master(struct wpi_softc *sc)
3017 {
3018 uint32_t tmp;
3019 int ntries;
3020
3021 tmp = WPI_READ(sc, WPI_RESET);
3022 WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER);
3023
3024 tmp = WPI_READ(sc, WPI_GPIO_CTL);
3025 if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP)
3026 return; /* already asleep */
3027
3028 for (ntries = 0; ntries < 100; ntries++) {
3029 if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED)
3030 break;
3031 DELAY(10);
3032 }
3033 if (ntries == 100) {
3034 aprint_error_dev(sc->sc_dev, "timeout waiting for master\n");
3035 }
3036 }
3037
3038 static int
wpi_power_up(struct wpi_softc * sc)3039 wpi_power_up(struct wpi_softc *sc)
3040 {
3041 uint32_t tmp;
3042 int ntries;
3043
3044 wpi_mem_lock(sc);
3045 tmp = wpi_mem_read(sc, WPI_MEM_POWER);
3046 wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000);
3047 wpi_mem_unlock(sc);
3048
3049 for (ntries = 0; ntries < 5000; ntries++) {
3050 if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED)
3051 break;
3052 DELAY(10);
3053 }
3054 if (ntries == 5000) {
3055 aprint_error_dev(sc->sc_dev,
3056 "timeout waiting for NIC to power up\n");
3057 return ETIMEDOUT;
3058 }
3059 return 0;
3060 }
3061
3062 static int
wpi_reset(struct wpi_softc * sc)3063 wpi_reset(struct wpi_softc *sc)
3064 {
3065 uint32_t tmp;
3066 int ntries;
3067
3068 /* clear any pending interrupts */
3069 WPI_WRITE(sc, WPI_INTR, 0xffffffff);
3070
3071 tmp = WPI_READ(sc, WPI_PLL_CTL);
3072 WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT);
3073
3074 tmp = WPI_READ(sc, WPI_CHICKEN);
3075 WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS);
3076
3077 tmp = WPI_READ(sc, WPI_GPIO_CTL);
3078 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT);
3079
3080 /* wait for clock stabilization */
3081 for (ntries = 0; ntries < 1000; ntries++) {
3082 if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK)
3083 break;
3084 DELAY(10);
3085 }
3086 if (ntries == 1000) {
3087 aprint_error_dev(sc->sc_dev,
3088 "timeout waiting for clock stabilization\n");
3089 return ETIMEDOUT;
3090 }
3091
3092 /* initialize EEPROM */
3093 tmp = WPI_READ(sc, WPI_EEPROM_STATUS);
3094 if ((tmp & WPI_EEPROM_VERSION) == 0) {
3095 aprint_error_dev(sc->sc_dev, "EEPROM not found\n");
3096 return EIO;
3097 }
3098 WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED);
3099
3100 return 0;
3101 }
3102
3103 static void
wpi_hw_config(struct wpi_softc * sc)3104 wpi_hw_config(struct wpi_softc *sc)
3105 {
3106 uint32_t rev, hw;
3107
3108 /* voodoo from the reference driver */
3109 hw = WPI_READ(sc, WPI_HWCONFIG);
3110
3111 rev = pci_conf_read(sc->sc_pct, sc->sc_pcitag, PCI_CLASS_REG);
3112 rev = PCI_REVISION(rev);
3113 if ((rev & 0xc0) == 0x40)
3114 hw |= WPI_HW_ALM_MB;
3115 else if (!(rev & 0x80))
3116 hw |= WPI_HW_ALM_MM;
3117
3118 if (sc->cap == 0x80)
3119 hw |= WPI_HW_SKU_MRC;
3120
3121 hw &= ~WPI_HW_REV_D;
3122 if ((le16toh(sc->rev) & 0xf0) == 0xd0)
3123 hw |= WPI_HW_REV_D;
3124
3125 if (sc->type > 1)
3126 hw |= WPI_HW_TYPE_B;
3127
3128 DPRINTF(("setting h/w config %x\n", hw));
3129 WPI_WRITE(sc, WPI_HWCONFIG, hw);
3130 }
3131
3132 static int
wpi_init(struct ifnet * ifp)3133 wpi_init(struct ifnet *ifp)
3134 {
3135 struct wpi_softc *sc = ifp->if_softc;
3136 struct ieee80211com *ic = &sc->sc_ic;
3137 uint32_t tmp;
3138 int qid, ntries, error;
3139
3140 wpi_stop(ifp,1);
3141 (void)wpi_reset(sc);
3142
3143 wpi_mem_lock(sc);
3144 wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00);
3145 DELAY(20);
3146 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV);
3147 wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800);
3148 wpi_mem_unlock(sc);
3149
3150 (void)wpi_power_up(sc);
3151 wpi_hw_config(sc);
3152
3153 /* init Rx ring */
3154 wpi_mem_lock(sc);
3155 WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr);
3156 WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr +
3157 offsetof(struct wpi_shared, next));
3158 WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7);
3159 WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010);
3160 wpi_mem_unlock(sc);
3161
3162 /* init Tx rings */
3163 wpi_mem_lock(sc);
3164 wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */
3165 wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */
3166 wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */
3167 wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000);
3168 wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002);
3169 wpi_mem_write(sc, WPI_MEM_MAGIC4, 4);
3170 wpi_mem_write(sc, WPI_MEM_MAGIC5, 5);
3171
3172 WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr);
3173 WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5);
3174
3175 for (qid = 0; qid < 6; qid++) {
3176 WPI_WRITE(sc, WPI_TX_CTL(qid), 0);
3177 WPI_WRITE(sc, WPI_TX_BASE(qid), 0);
3178 WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008);
3179 }
3180 wpi_mem_unlock(sc);
3181
3182 /* clear "radio off" and "disable command" bits (reversed logic) */
3183 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF);
3184 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD);
3185
3186 /* clear any pending interrupts */
3187 WPI_WRITE(sc, WPI_INTR, 0xffffffff);
3188 /* enable interrupts */
3189 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK);
3190
3191 /* not sure why/if this is necessary... */
3192 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF);
3193 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF);
3194
3195 if ((error = wpi_load_firmware(sc)) != 0)
3196 /* wpi_load_firmware prints error messages for us. */
3197 goto fail1;
3198
3199 /* Check the status of the radio switch */
3200 mutex_enter(&sc->sc_rsw_mtx);
3201 if (wpi_getrfkill(sc)) {
3202 mutex_exit(&sc->sc_rsw_mtx);
3203 aprint_error_dev(sc->sc_dev,
3204 "radio is disabled by hardware switch\n");
3205 ifp->if_flags &= ~IFF_UP;
3206 error = EBUSY;
3207 goto fail1;
3208 }
3209 mutex_exit(&sc->sc_rsw_mtx);
3210
3211 /* wait for thermal sensors to calibrate */
3212 for (ntries = 0; ntries < 1000; ntries++) {
3213 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0)
3214 break;
3215 DELAY(10);
3216 }
3217 if (ntries == 1000) {
3218 aprint_error_dev(sc->sc_dev,
3219 "timeout waiting for thermal sensors calibration\n");
3220 error = ETIMEDOUT;
3221 goto fail1;
3222 }
3223 DPRINTF(("temperature %d\n", sc->temp));
3224
3225 if ((error = wpi_config(sc)) != 0) {
3226 aprint_error_dev(sc->sc_dev, "could not configure device\n");
3227 goto fail1;
3228 }
3229
3230 ifp->if_flags &= ~IFF_OACTIVE;
3231 ifp->if_flags |= IFF_RUNNING;
3232
3233 if (ic->ic_opmode != IEEE80211_M_MONITOR) {
3234 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)
3235 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
3236 }
3237 else
3238 ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
3239
3240 return 0;
3241
3242 fail1: wpi_stop(ifp, 1);
3243 return error;
3244 }
3245
3246 static void
wpi_stop(struct ifnet * ifp,int disable)3247 wpi_stop(struct ifnet *ifp, int disable)
3248 {
3249 struct wpi_softc *sc = ifp->if_softc;
3250 struct ieee80211com *ic = &sc->sc_ic;
3251 uint32_t tmp;
3252 int ac;
3253
3254 ifp->if_timer = sc->sc_tx_timer = 0;
3255 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
3256
3257 ieee80211_new_state(ic, IEEE80211_S_INIT, -1);
3258
3259 /* disable interrupts */
3260 WPI_WRITE(sc, WPI_MASK, 0);
3261 WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK);
3262 WPI_WRITE(sc, WPI_INTR_STATUS, 0xff);
3263 WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000);
3264
3265 wpi_mem_lock(sc);
3266 wpi_mem_write(sc, WPI_MEM_MODE, 0);
3267 wpi_mem_unlock(sc);
3268
3269 /* reset all Tx rings */
3270 for (ac = 0; ac < 4; ac++)
3271 wpi_reset_tx_ring(sc, &sc->txq[ac]);
3272 wpi_reset_tx_ring(sc, &sc->cmdq);
3273
3274 /* reset Rx ring */
3275 wpi_reset_rx_ring(sc, &sc->rxq);
3276
3277 wpi_mem_lock(sc);
3278 wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200);
3279 wpi_mem_unlock(sc);
3280
3281 DELAY(5);
3282
3283 wpi_stop_master(sc);
3284
3285 tmp = WPI_READ(sc, WPI_RESET);
3286 WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET);
3287 }
3288
3289 static bool
wpi_resume(device_t dv,const pmf_qual_t * qual)3290 wpi_resume(device_t dv, const pmf_qual_t *qual)
3291 {
3292 struct wpi_softc *sc = device_private(dv);
3293
3294 (void)wpi_reset(sc);
3295
3296 return true;
3297 }
3298
3299 /*
3300 * Return whether or not the radio is enabled in hardware
3301 * (i.e. the rfkill switch is "off").
3302 */
3303 static int
wpi_getrfkill(struct wpi_softc * sc)3304 wpi_getrfkill(struct wpi_softc *sc)
3305 {
3306 uint32_t tmp;
3307
3308 wpi_mem_lock(sc);
3309 tmp = wpi_mem_read(sc, WPI_MEM_RFKILL);
3310 wpi_mem_unlock(sc);
3311
3312 KASSERT(mutex_owned(&sc->sc_rsw_mtx));
3313 if (tmp & 0x01) {
3314 /* switch is on */
3315 if (sc->sc_rsw_status != WPI_RSW_ON) {
3316 sc->sc_rsw_status = WPI_RSW_ON;
3317 sysmon_pswitch_event(&sc->sc_rsw,
3318 PSWITCH_EVENT_PRESSED);
3319 }
3320 } else {
3321 /* switch is off */
3322 if (sc->sc_rsw_status != WPI_RSW_OFF) {
3323 sc->sc_rsw_status = WPI_RSW_OFF;
3324 sysmon_pswitch_event(&sc->sc_rsw,
3325 PSWITCH_EVENT_RELEASED);
3326 }
3327 }
3328
3329 return !(tmp & 0x01);
3330 }
3331
3332 static int
wpi_sysctl_radio(SYSCTLFN_ARGS)3333 wpi_sysctl_radio(SYSCTLFN_ARGS)
3334 {
3335 struct sysctlnode node;
3336 struct wpi_softc *sc;
3337 int val, error;
3338
3339 node = *rnode;
3340 sc = (struct wpi_softc *)node.sysctl_data;
3341
3342 mutex_enter(&sc->sc_rsw_mtx);
3343 val = !wpi_getrfkill(sc);
3344 mutex_exit(&sc->sc_rsw_mtx);
3345
3346 node.sysctl_data = &val;
3347 error = sysctl_lookup(SYSCTLFN_CALL(&node));
3348
3349 if (error || newp == NULL)
3350 return error;
3351
3352 return 0;
3353 }
3354
3355 static void
wpi_sysctlattach(struct wpi_softc * sc)3356 wpi_sysctlattach(struct wpi_softc *sc)
3357 {
3358 int rc;
3359 const struct sysctlnode *rnode;
3360 const struct sysctlnode *cnode;
3361
3362 struct sysctllog **clog = &sc->sc_sysctllog;
3363
3364 if ((rc = sysctl_createv(clog, 0, NULL, &rnode,
3365 CTLFLAG_PERMANENT, CTLTYPE_NODE, device_xname(sc->sc_dev),
3366 SYSCTL_DESCR("wpi controls and statistics"),
3367 NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL)) != 0)
3368 goto err;
3369
3370 if ((rc = sysctl_createv(clog, 0, &rnode, &cnode,
3371 CTLFLAG_PERMANENT, CTLTYPE_INT, "radio",
3372 SYSCTL_DESCR("radio transmitter switch state (0=off, 1=on)"),
3373 wpi_sysctl_radio, 0, (void *)sc, 0, CTL_CREATE, CTL_EOL)) != 0)
3374 goto err;
3375
3376 #ifdef WPI_DEBUG
3377 /* control debugging printfs */
3378 if ((rc = sysctl_createv(clog, 0, &rnode, &cnode,
3379 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
3380 "debug", SYSCTL_DESCR("Enable debugging output"),
3381 NULL, 0, &wpi_debug, 0, CTL_CREATE, CTL_EOL)) != 0)
3382 goto err;
3383 #endif
3384
3385 return;
3386 err:
3387 aprint_error("%s: sysctl_createv failed (rc = %d)\n", __func__, rc);
3388 }
3389
3390 static void
wpi_rsw_thread(void * arg)3391 wpi_rsw_thread(void *arg)
3392 {
3393 struct wpi_softc *sc = (struct wpi_softc *)arg;
3394
3395 mutex_enter(&sc->sc_rsw_mtx);
3396 for (;;) {
3397 cv_timedwait(&sc->sc_rsw_cv, &sc->sc_rsw_mtx, hz);
3398 if (sc->sc_dying) {
3399 sc->sc_rsw_lwp = NULL;
3400 cv_broadcast(&sc->sc_rsw_cv);
3401 mutex_exit(&sc->sc_rsw_mtx);
3402 kthread_exit(0);
3403 }
3404 wpi_getrfkill(sc);
3405 }
3406 }
3407
3408