1 /* $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $ */ 2 3 /*- 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> 7 * 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. 11 * 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. 19 */ 20 21 #include <sys/cdefs.h> 22 #include "opt_wlan.h" 23 24 #include <sys/param.h> 25 #include <sys/lock.h> 26 #include <sys/mutex.h> 27 #include <sys/mbuf.h> 28 #include <sys/kernel.h> 29 #include <sys/socket.h> 30 #include <sys/systm.h> 31 #include <sys/malloc.h> 32 #include <sys/queue.h> 33 #include <sys/taskqueue.h> 34 #include <sys/bus.h> 35 #include <sys/endian.h> 36 #include <sys/linker.h> 37 38 #include <net/if.h> 39 #include <net/ethernet.h> 40 #include <net/if_media.h> 41 42 #include <net80211/ieee80211_var.h> 43 #include <net80211/ieee80211_radiotap.h> 44 45 #include <dev/rtwn/if_rtwnreg.h> 46 #include <dev/rtwn/if_rtwnvar.h> 47 #include <dev/rtwn/if_rtwn_ridx.h> 48 49 #include <dev/rtwn/rtl8192c/r92c.h> 50 #include <dev/rtwn/rtl8192c/r92c_rx_desc.h> 51 52 int 53 r92c_classify_intr(struct rtwn_softc *sc, void *buf, int len) 54 { 55 /* NB: reports are fetched from C2H_MSG register. */ 56 return (RTWN_RX_DATA); 57 } 58 59 int8_t 60 r92c_get_rssi_cck(struct rtwn_softc *sc, void *physt) 61 { 62 static const int8_t cckoff[] = { 16, -12, -26, -46 }; 63 struct r92c_rx_cck *cck = (struct r92c_rx_cck *)physt; 64 uint8_t rpt; 65 int8_t rssi; 66 67 if (sc->sc_flags & RTWN_FLAG_CCK_HIPWR) { 68 rpt = (cck->agc_rpt >> 5) & 0x03; 69 rssi = (cck->agc_rpt & 0x1f) << 1; 70 } else { 71 rpt = (cck->agc_rpt >> 6) & 0x03; 72 rssi = cck->agc_rpt & 0x3e; 73 } 74 rssi = cckoff[rpt] - rssi; 75 76 return (rssi); 77 } 78 79 int8_t 80 r92c_get_rssi_ofdm(struct rtwn_softc *sc, void *physt) 81 { 82 struct r92c_rx_phystat *phy = (struct r92c_rx_phystat *)physt; 83 int rssi; 84 85 /* Get average RSSI. */ 86 rssi = ((phy->pwdb_all >> 1) & 0x7f) - 110; 87 88 return (rssi); 89 } 90 91 uint8_t 92 r92c_rx_radiotap_flags(const void *buf) 93 { 94 const struct r92c_rx_stat *stat = buf; 95 uint8_t flags, rate; 96 97 if (!(stat->rxdw3 & htole32(R92C_RXDW3_SPLCP))) 98 return (0); 99 100 rate = MS(le32toh(stat->rxdw3), R92C_RXDW3_RATE); 101 if (RTWN_RATE_IS_CCK(rate)) 102 flags = IEEE80211_RADIOTAP_F_SHORTPRE; 103 else 104 flags = IEEE80211_RADIOTAP_F_SHORTGI; 105 return (flags); 106 } 107 108 void 109 r92c_get_rx_stats(struct rtwn_softc *sc, struct ieee80211_rx_stats *rxs, 110 const void *desc, const void *physt_ptr) 111 { 112 const struct r92c_rx_stat *stat = desc; 113 uint32_t rxdw1, rxdw3; 114 uint8_t rate; 115 116 rxdw1 = le32toh(stat->rxdw1); 117 rxdw3 = le32toh(stat->rxdw3); 118 rate = MS(rxdw3, R92C_RXDW3_RATE); 119 120 if (rxdw1 & R92C_RXDW1_AMPDU) 121 rxs->c_pktflags |= IEEE80211_RX_F_AMPDU; 122 else if (rxdw1 & R92C_RXDW1_AMPDU_MORE) 123 rxs->c_pktflags |= IEEE80211_RX_F_AMPDU_MORE; 124 if ((rxdw3 & R92C_RXDW3_SPLCP) && rate >= RTWN_RIDX_HT_MCS(0)) 125 rxs->c_pktflags |= IEEE80211_RX_F_SHORTGI; 126 127 if (rxdw3 & R92C_RXDW3_HT40) 128 rxs->c_width = IEEE80211_RX_FW_40MHZ; 129 else 130 rxs->c_width = IEEE80211_RX_FW_20MHZ; 131 132 if (RTWN_RATE_IS_CCK(rate)) 133 rxs->c_phytype = IEEE80211_RX_FP_11B; 134 else if (rate < RTWN_RIDX_HT_MCS(0)) 135 rxs->c_phytype = IEEE80211_RX_FP_11G; 136 else 137 rxs->c_phytype = IEEE80211_RX_FP_11NG; 138 139 /* Map HW rate index to 802.11 rate. */ 140 if (rate < RTWN_RIDX_HT_MCS(0)) { 141 rxs->c_rate = ridx2rate[rate]; 142 if (RTWN_RATE_IS_CCK(rate)) 143 rxs->c_pktflags |= IEEE80211_RX_F_CCK; 144 else 145 rxs->c_pktflags |= IEEE80211_RX_F_OFDM; 146 } else { /* MCS0~15. */ 147 rxs->c_rate = 148 IEEE80211_RATE_MCS | (rate - RTWN_RIDX_HT_MCS_SHIFT); 149 rxs->c_pktflags |= IEEE80211_RX_F_HT; 150 } 151 } 152