xref: /freebsd/sys/dev/rtwn/rtl8188e/r88e_rx.c (revision a25896ca1270e25b657ceaa8d47d5699515f5c25)
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 __FBSDID("$FreeBSD$");
23 
24 #include "opt_wlan.h"
25 
26 #include <sys/param.h>
27 #include <sys/lock.h>
28 #include <sys/mutex.h>
29 #include <sys/mbuf.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>
36 #include <sys/bus.h>
37 #include <sys/endian.h>
38 #include <sys/linker.h>
39 
40 #include <net/if.h>
41 #include <net/ethernet.h>
42 #include <net/if_media.h>
43 
44 #include <net80211/ieee80211_var.h>
45 #include <net80211/ieee80211_radiotap.h>
46 #include <net80211/ieee80211_ratectl.h>
47 
48 #include <dev/rtwn/if_rtwnreg.h>
49 #include <dev/rtwn/if_rtwnvar.h>
50 
51 #include <dev/rtwn/if_rtwn_debug.h>
52 #include <dev/rtwn/if_rtwn_ridx.h>
53 
54 #include <dev/rtwn/rtl8192c/r92c.h>
55 #include <dev/rtwn/rtl8188e/r88e.h>
56 #include <dev/rtwn/rtl8188e/r88e_rx_desc.h>
57 
58 
59 void
60 r88e_ratectl_tx_complete(struct rtwn_softc *sc, uint8_t *buf, int len)
61 {
62 #if __FreeBSD_version >= 1200012
63 	struct ieee80211_ratectl_tx_status txs;
64 #endif
65 	struct r88e_tx_rpt_ccx *rpt;
66 	struct ieee80211_node *ni;
67 	uint8_t macid;
68 	int ntries;
69 
70 	/* Skip Rx descriptor. */
71 	buf += sizeof(struct r92c_rx_stat);
72 	len -= sizeof(struct r92c_rx_stat);
73 
74 	rpt = (struct r88e_tx_rpt_ccx *)buf;
75 	if (len != sizeof(*rpt)) {
76 		RTWN_DPRINTF(sc, RTWN_DEBUG_INTR,
77 		    "%s: wrong report size (%d, must be %zu)\n",
78 		    __func__, len, sizeof(*rpt));
79 		return;
80 	}
81 
82 	RTWN_DPRINTF(sc, RTWN_DEBUG_INTR,
83 	    "%s: ccx report dump: 0: %02X, 1: %02X, 2: %02X, queue time: "
84 	    "low %02X, high %02X, final ridx: %02X, 6: %02X, 7: %02X\n",
85 	    __func__, rpt->rptb0, rpt->rptb1, rpt->rptb2, rpt->queue_time_low,
86 	    rpt->queue_time_high, rpt->final_rate, rpt->rptb6, rpt->rptb7);
87 
88 	macid = MS(rpt->rptb1, R88E_RPTB1_MACID);
89 	if (macid > sc->macid_limit) {
90 		device_printf(sc->sc_dev,
91 		    "macid %u is too big; increase MACID_MAX limit\n",
92 		    macid);
93 		return;
94 	}
95 
96 	ntries = MS(rpt->rptb2, R88E_RPTB2_RETRY_CNT);
97 
98 	ni = sc->node_list[macid];
99 	if (ni != NULL) {
100 		RTWN_DPRINTF(sc, RTWN_DEBUG_INTR, "%s: frame for macid %u was"
101 		    "%s sent (%d retries)\n", __func__, macid,
102 		    (rpt->rptb1 & R88E_RPTB1_PKT_OK) ? "" : " not",
103 		    ntries);
104 
105 #if __FreeBSD_version >= 1200012
106 		txs.flags = IEEE80211_RATECTL_STATUS_LONG_RETRY |
107 			    IEEE80211_RATECTL_STATUS_FINAL_RATE;
108 		txs.long_retries = ntries;
109 		if (rpt->final_rate > RTWN_RIDX_OFDM54) {	/* MCS */
110 			txs.final_rate =
111 			    rpt->final_rate - RTWN_RIDX_HT_MCS_SHIFT;
112 			txs.final_rate |= IEEE80211_RATE_MCS;
113 		} else
114 			txs.final_rate = ridx2rate[rpt->final_rate];
115 		if (rpt->rptb1 & R88E_RPTB1_PKT_OK)
116 			txs.status = IEEE80211_RATECTL_TX_SUCCESS;
117 		else if (rpt->rptb2 & R88E_RPTB2_RETRY_OVER)
118 			txs.status = IEEE80211_RATECTL_TX_FAIL_LONG;
119 		else if (rpt->rptb2 & R88E_RPTB2_LIFE_EXPIRE)
120 			txs.status = IEEE80211_RATECTL_TX_FAIL_EXPIRED;
121 		else
122 			txs.status = IEEE80211_RATECTL_TX_FAIL_UNSPECIFIED;
123 		ieee80211_ratectl_tx_complete(ni, &txs);
124 #else
125 		struct ieee80211vap *vap = ni->ni_vap;
126 		if (rpt->rptb1 & R88E_RPTB1_PKT_OK) {
127 			ieee80211_ratectl_tx_complete(vap, ni,
128 			    IEEE80211_RATECTL_TX_SUCCESS, &ntries, NULL);
129 		} else {
130 			ieee80211_ratectl_tx_complete(vap, ni,
131 			    IEEE80211_RATECTL_TX_FAILURE, &ntries, NULL);
132 		}
133 #endif
134 	} else {
135 		RTWN_DPRINTF(sc, RTWN_DEBUG_INTR, "%s: macid %u, ni is NULL\n",
136 		    __func__, macid);
137 	}
138 }
139 
140 void
141 r88e_handle_c2h_report(struct rtwn_softc *sc, uint8_t *buf, int len)
142 {
143 
144 	/* Skip Rx descriptor. */
145 	buf += sizeof(struct r92c_rx_stat);
146 	len -= sizeof(struct r92c_rx_stat);
147 
148 	if (len != R88E_INTR_MSG_LEN) {
149 		RTWN_DPRINTF(sc, RTWN_DEBUG_INTR,
150 		    "%s: wrong interrupt message size (%d, must be %d)\n",
151 		    __func__, len, R88E_INTR_MSG_LEN);
152 		return;
153 	}
154 
155 	/* XXX TODO */
156 }
157 
158 int8_t
159 r88e_get_rssi_cck(struct rtwn_softc *sc, void *physt)
160 {
161 	struct r88e_rx_phystat *phy = (struct r88e_rx_phystat *)physt;
162 	int8_t lna_idx, vga_idx, rssi;
163 
164 	lna_idx = (phy->agc_rpt & 0xe0) >> 5;
165 	vga_idx = (phy->agc_rpt & 0x1f);
166 	rssi = 6 - 2 * vga_idx;
167 
168 	switch (lna_idx) {
169 	case 7:
170 		if (vga_idx > 27)
171 			rssi = -100 + 6;
172 		else
173 			rssi += -100 + 2 * 27;
174 		break;
175 	case 6:
176 		rssi += -48 + 2 * 2;
177 		break;
178 	case 5:
179 		rssi += -42 + 2 * 7;
180 		break;
181 	case 4:
182 		rssi += -36 + 2 * 7;
183 		break;
184 	case 3:
185 		rssi += -24 + 2 * 7;
186 		break;
187 	case 2:
188 		rssi += -6 + 2 * 5;
189 		if (sc->sc_flags & RTWN_FLAG_CCK_HIPWR)
190 			rssi -= 6;
191 		break;
192 	case 1:
193 		rssi += 8;
194 		break;
195 	case 0:
196 		rssi += 14;
197 		break;
198 	}
199 
200 	return (rssi);
201 }
202 
203 int8_t
204 r88e_get_rssi_ofdm(struct rtwn_softc *sc, void *physt)
205 {
206 	struct r88e_rx_phystat *phy = (struct r88e_rx_phystat *)physt;
207 	int rssi;
208 
209 	/* Get average RSSI. */
210 	rssi = ((phy->sig_qual >> 1) & 0x7f) - 110;
211 
212 	return (rssi);
213 }
214 
215 void
216 r88e_get_rx_stats(struct rtwn_softc *sc, struct ieee80211_rx_stats *rxs,
217     const void *desc, const void *physt_ptr)
218 {
219 	const struct r88e_rx_phystat *physt = physt_ptr;
220 
221 	r92c_get_rx_stats(sc, rxs, desc, physt_ptr);
222 
223 	if (!sc->sc_ht40) {	/* XXX center channel */
224 		rxs->r_flags |= IEEE80211_R_IEEE | IEEE80211_R_FREQ;
225 		rxs->c_ieee = physt->chan;
226 		rxs->c_freq = ieee80211_ieee2mhz(rxs->c_ieee,
227 		    IEEE80211_CHAN_2GHZ);
228 	}
229 }
230