1 /* $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $ */
4 * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
5 * Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
6 * Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 #include <sys/cdefs.h>
22 __FBSDID("$FreeBSD$");
26 #include <sys/param.h>
28 #include <sys/mutex.h>
30 #include <sys/kernel.h>
31 #include <sys/socket.h>
32 #include <sys/systm.h>
33 #include <sys/malloc.h>
34 #include <sys/queue.h>
35 #include <sys/taskqueue.h>
37 #include <sys/endian.h>
40 #include <net/if_var.h>
41 #include <net/ethernet.h>
42 #include <net/if_dl.h>
43 #include <net/if_media.h>
45 #include <net80211/ieee80211_var.h>
46 #include <net80211/ieee80211_radiotap.h>
48 #include <dev/rtwn/if_rtwnreg.h>
49 #include <dev/rtwn/if_rtwnvar.h>
51 #include <dev/rtwn/if_rtwn_debug.h>
52 #include <dev/rtwn/if_rtwn_ridx.h>
53 #include <dev/rtwn/if_rtwn_rx.h>
55 #include <dev/rtwn/rtl8192c/r92c_reg.h>
56 #include <dev/rtwn/rtl8192c/r92c_rx_desc.h>
60 rtwn_get_rates(struct rtwn_softc *sc, const struct ieee80211_rateset *rs,
61 const struct ieee80211_htrateset *rs_ht, uint32_t *rates_p,
62 int *maxrate_p, int basic_rates)
72 /* This is for 11bg */
73 for (i = 0; i < rs->rs_nrates; i++) {
74 /* Convert 802.11 rate to HW rate index. */
75 ridx = rate2ridx(IEEE80211_RV(rs->rs_rates[i]));
76 if (ridx == RTWN_RIDX_UNKNOWN) /* Unknown rate, skip. */
78 if (((rs->rs_rates[i] & IEEE80211_RATE_BASIC) != 0) ||
86 /* If we're doing 11n, enable 11n rates */
87 if (rs_ht != NULL && !basic_rates) {
88 for (i = 0; i < rs_ht->rs_nrates; i++) {
89 if ((rs_ht->rs_rates[i] & 0x7f) > 0xf)
91 /* 11n rates start at index 12 */
92 ridx = RTWN_RIDX_MCS((rs_ht->rs_rates[i]) & 0xf);
95 /* Guard against the rate table being oddly ordered */
101 RTWN_DPRINTF(sc, RTWN_DEBUG_RA,
102 "%s: rates 0x%08X, maxrate %d\n", __func__, rates, maxrate);
106 if (maxrate_p != NULL)
107 *maxrate_p = maxrate;
111 rtwn_set_basicrates(struct rtwn_softc *sc, uint32_t rates)
114 RTWN_DPRINTF(sc, RTWN_DEBUG_RA, "%s: rates 0x%08X\n", __func__, rates);
116 rtwn_setbits_4(sc, R92C_RRSR, R92C_RRSR_RATE_BITMAP_M, rates);
120 rtwn_update_avgrssi(struct rtwn_softc *sc, struct rtwn_node *un, int rate)
124 /* Convert antenna signal to percentage. */
125 if (un->last_rssi <= -100 || un->last_rssi >= 20)
127 else if (un->last_rssi >= 0)
130 pwdb = 100 + un->last_rssi;
131 if (RTWN_RATE_IS_CCK(rate)) {
132 /* CCK gain is smaller than OFDM/MCS gain. */
146 if (un->avg_pwdb == -1) /* Init. */
148 else if (un->avg_pwdb < pwdb)
149 un->avg_pwdb = ((un->avg_pwdb * 19 + pwdb) / 20) + 1;
151 un->avg_pwdb = ((un->avg_pwdb * 19 + pwdb) / 20);
153 RTWN_DPRINTF(sc, RTWN_DEBUG_RSSI,
154 "MACID %d, PWDB %d, EMA %d\n", un->id, pwdb, un->avg_pwdb);
158 rtwn_get_rssi(struct rtwn_softc *sc, int rate, void *physt)
162 if (RTWN_RATE_IS_CCK(rate))
163 rssi = rtwn_get_rssi_cck(sc, physt);
165 rssi = rtwn_get_rssi_ofdm(sc, physt);
171 rtwn_get_tsf_low(struct rtwn_softc *sc, int id)
173 return (rtwn_read_4(sc, R92C_TSFTR(id)));
177 rtwn_get_tsf_high(struct rtwn_softc *sc, int id)
179 return (rtwn_read_4(sc, R92C_TSFTR(id) + 4));
183 rtwn_get_tsf(struct rtwn_softc *sc, uint64_t *buf, int id)
185 /* NB: we cannot read it at once. */
186 *buf = rtwn_get_tsf_high(sc, id);
188 *buf += rtwn_get_tsf_low(sc, id);
191 struct ieee80211_node *
192 rtwn_rx_common(struct rtwn_softc *sc, struct mbuf *m, void *desc,
195 struct ieee80211com *ic = &sc->sc_ic;
196 struct ieee80211_node *ni;
197 struct ieee80211_frame_min *wh;
198 struct rtwn_node *un;
199 struct r92c_rx_stat *stat;
200 uint32_t rxdw0, rxdw3;
201 int cipher, infosz, pktlen, rate, shift;
204 rxdw0 = le32toh(stat->rxdw0);
205 rxdw3 = le32toh(stat->rxdw3);
207 cipher = MS(rxdw0, R92C_RXDW0_CIPHER);
208 infosz = MS(rxdw0, R92C_RXDW0_INFOSZ) * 8;
209 pktlen = MS(rxdw0, R92C_RXDW0_PKTLEN);
210 shift = MS(rxdw0, R92C_RXDW0_SHIFT);
211 rate = MS(rxdw3, R92C_RXDW3_RATE);
213 wh = (struct ieee80211_frame_min *)(mtodo(m, shift + infosz));
214 if ((wh->i_fc[1] & IEEE80211_FC1_PROTECTED) &&
215 cipher != R92C_CAM_ALGO_NONE)
218 if (pktlen >= sizeof(*wh))
219 ni = ieee80211_find_rxnode(ic, wh);
224 /* Get RSSI from PHY status descriptor if present. */
225 if (infosz != 0 && (rxdw0 & R92C_RXDW0_PHYST)) {
226 *rssi = rtwn_get_rssi(sc, rate, mtod(m, void *));
227 RTWN_DPRINTF(sc, RTWN_DEBUG_RSSI, "%s: rssi %d, ridx %d\n",
228 __func__, *rssi, rate);
230 sc->last_rssi = *rssi;
232 un->last_rssi = *rssi;
234 /* Update our average RSSI. */
235 rtwn_update_avgrssi(sc, un, rate);
238 *rssi = (un != NULL) ? un->last_rssi : sc->last_rssi;
240 if (ieee80211_radiotap_active(ic)) {
241 struct rtwn_rx_radiotap_header *tap = &sc->sc_rxtap;
242 int id = RTWN_VAP_ID_INVALID;
245 id = RTWN_VAP(ni->ni_vap)->id;
246 if (id == RTWN_VAP_ID_INVALID)
249 tap->wr_flags = rtwn_rx_radiotap_flags(sc, desc);
250 tap->wr_tsft = rtwn_get_tsf_high(sc, id);
251 if (le32toh(stat->tsf_low) > rtwn_get_tsf_low(sc, id))
253 tap->wr_tsft = (uint64_t)htole32(tap->wr_tsft) << 32;
254 tap->wr_tsft += stat->tsf_low;
258 /* Map HW rate index to 802.11 rate. */
259 if (rate < RTWN_RIDX_MCS(0))
260 tap->wr_rate = ridx2rate[rate];
262 tap->wr_rate = IEEE80211_RATE_MCS | (rate - 12);
264 tap->wr_dbm_antsignal = *rssi;
265 tap->wr_dbm_antnoise = RTWN_NOISE_FLOOR;
268 /* Drop PHY descriptor. */
269 m_adj(m, infosz + shift);
275 rtwn_adhoc_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m, int subtype,
276 const struct ieee80211_rx_stats *rxs,
279 struct ieee80211vap *vap = ni->ni_vap;
280 struct rtwn_softc *sc = vap->iv_ic->ic_softc;
281 struct rtwn_vap *uvp = RTWN_VAP(vap);
282 uint64_t ni_tstamp, curr_tstamp;
284 uvp->recv_mgmt(ni, m, subtype, rxs, rssi, nf);
286 if (vap->iv_state == IEEE80211_S_RUN &&
287 (subtype == IEEE80211_FC0_SUBTYPE_BEACON ||
288 subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP)) {
289 ni_tstamp = le64toh(ni->ni_tstamp.tsf);
291 rtwn_get_tsf(sc, &curr_tstamp, uvp->id);
294 if (ni_tstamp >= curr_tstamp)
295 (void) ieee80211_ibss_merge(ni);
300 rtwn_get_multi_pos(const uint8_t maddr[])
302 uint64_t mask = 0x00004d101df481b4;
303 uint8_t pos = 0x27; /* initial value */
306 for (i = 0; i < IEEE80211_ADDR_LEN; i++)
307 for (j = (i == 0) ? 1 : 0; j < 8; j++)
308 if ((maddr[i] >> j) & 1)
309 pos ^= (mask >> (i * 8 + j - 1));
317 rtwn_set_multi(struct rtwn_softc *sc)
319 struct ieee80211com *ic = &sc->sc_ic;
322 RTWN_ASSERT_LOCKED(sc);
324 /* general structure was copied from ath(4). */
325 if (ic->ic_allmulti == 0) {
326 struct ieee80211vap *vap;
328 struct ifmultiaddr *ifma;
331 * Merge multicast addresses to form the hardware filter.
333 mfilt[0] = mfilt[1] = 0;
334 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
337 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
341 dl = LLADDR((struct sockaddr_dl *)
343 pos = rtwn_get_multi_pos(dl);
345 mfilt[pos / 32] |= (1 << (pos % 32));
347 if_maddr_runlock(ifp);
350 mfilt[0] = mfilt[1] = ~0;
353 rtwn_write_4(sc, R92C_MAR + 0, mfilt[0]);
354 rtwn_write_4(sc, R92C_MAR + 4, mfilt[1]);
356 RTWN_DPRINTF(sc, RTWN_DEBUG_STATE, "%s: MC filter %08x:%08x\n",
357 __func__, mfilt[0], mfilt[1]);
361 rtwn_rxfilter_update_mgt(struct rtwn_softc *sc)
366 if (sc->bcn_vaps == 0) { /* STA and/or MONITOR mode vaps */
368 R92C_RXFLTMAP_SUBTYPE(IEEE80211_FC0_SUBTYPE_ASSOC_REQ) |
369 R92C_RXFLTMAP_SUBTYPE(IEEE80211_FC0_SUBTYPE_REASSOC_REQ) |
370 R92C_RXFLTMAP_SUBTYPE(IEEE80211_FC0_SUBTYPE_PROBE_REQ));
372 if (sc->ap_vaps == sc->nvaps - sc->mon_vaps) { /* AP vaps only */
374 R92C_RXFLTMAP_SUBTYPE(IEEE80211_FC0_SUBTYPE_ASSOC_RESP) |
375 R92C_RXFLTMAP_SUBTYPE(IEEE80211_FC0_SUBTYPE_REASSOC_RESP));
377 rtwn_write_2(sc, R92C_RXFLTMAP0, filter);
381 rtwn_rxfilter_update(struct rtwn_softc *sc)
384 RTWN_ASSERT_LOCKED(sc);
386 /* Filter for management frames. */
387 rtwn_rxfilter_update_mgt(sc);
389 /* Update Rx filter. */
390 rtwn_set_promisc(sc);
394 rtwn_rxfilter_init(struct rtwn_softc *sc)
398 RTWN_ASSERT_LOCKED(sc);
400 /* Setup multicast filter. */
403 /* Reject all control frames. */
404 rtwn_write_2(sc, R92C_RXFLTMAP1, 0x0000);
406 /* Reject all data frames. */
407 rtwn_write_2(sc, R92C_RXFLTMAP2, 0x0000);
410 rcr |= R92C_RCR_AM | R92C_RCR_AB | R92C_RCR_APM |
411 R92C_RCR_HTC_LOC_CTRL | R92C_RCR_APP_PHYSTS |
412 R92C_RCR_APP_ICV | R92C_RCR_APP_MIC;
415 rtwn_write_4(sc, R92C_RCR, rcr);
417 /* Update dynamic Rx filter parts. */
418 rtwn_rxfilter_update(sc);
422 rtwn_set_rx_bssid_all(struct rtwn_softc *sc, int enable)
425 rtwn_setbits_4(sc, R92C_RCR, R92C_RCR_CBSSID_BCN, 0);
427 rtwn_setbits_4(sc, R92C_RCR, 0, R92C_RCR_CBSSID_BCN);
431 rtwn_set_promisc(struct rtwn_softc *sc)
433 struct ieee80211com *ic = &sc->sc_ic;
434 uint32_t mask1, mask2;
436 RTWN_ASSERT_LOCKED(sc);
438 mask1 = R92C_RCR_ACF | R92C_RCR_ADF | R92C_RCR_AMF | R92C_RCR_AAP;
439 mask2 = R92C_RCR_APM;
441 if (sc->vaps_running != 0) {
442 if (sc->bcn_vaps == 0)
443 mask2 |= R92C_RCR_CBSSID_BCN;
444 if (sc->ap_vaps == 0)
445 mask2 |= R92C_RCR_CBSSID_DATA;
448 if (ic->ic_promisc == 0 && sc->mon_vaps == 0)
449 rtwn_setbits_4(sc, R92C_RCR, mask1, mask2);
451 rtwn_setbits_4(sc, R92C_RCR, mask2, mask1);