2 * Copyright (c) 2010-2011 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 u8 ath_mci_duty_cycle[] = { 0, 50, 60, 70, 80, 85, 90, 95, 98 };
22 static struct ath_mci_profile_info*
23 ath_mci_find_profile(struct ath_mci_profile *mci,
24 struct ath_mci_profile_info *info)
26 struct ath_mci_profile_info *entry;
28 list_for_each_entry(entry, &mci->info, list) {
29 if (entry->conn_handle == info->conn_handle)
35 static bool ath_mci_add_profile(struct ath_common *common,
36 struct ath_mci_profile *mci,
37 struct ath_mci_profile_info *info)
39 struct ath_mci_profile_info *entry;
41 if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
42 (info->type == MCI_GPM_COEX_PROFILE_VOICE)) {
43 ath_dbg(common, ATH_DBG_MCI,
44 "Too many SCO profile, failed to add new profile\n");
48 if (((NUM_PROF(mci) - mci->num_sco) == ATH_MCI_MAX_ACL_PROFILE) &&
49 (info->type != MCI_GPM_COEX_PROFILE_VOICE)) {
50 ath_dbg(common, ATH_DBG_MCI,
51 "Too many ACL profile, failed to add new profile\n");
55 entry = ath_mci_find_profile(mci, info);
58 memcpy(entry, info, 10);
60 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
64 memcpy(entry, info, 10);
66 list_add_tail(&info->list, &mci->info);
71 static void ath_mci_del_profile(struct ath_common *common,
72 struct ath_mci_profile *mci,
73 struct ath_mci_profile_info *info)
75 struct ath_mci_profile_info *entry;
77 entry = ath_mci_find_profile(mci, info);
80 ath_dbg(common, ATH_DBG_MCI,
81 "Profile to be deleted not found\n");
85 list_del(&entry->list);
89 void ath_mci_flush_profile(struct ath_mci_profile *mci)
91 struct ath_mci_profile_info *info, *tinfo;
93 list_for_each_entry_safe(info, tinfo, &mci->info, list) {
94 list_del(&info->list);
101 static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex)
103 struct ath_mci_profile *mci = &btcoex->mci;
104 u32 wlan_airtime = btcoex->btcoex_period *
105 (100 - btcoex->duty_cycle) / 100;
108 * Scale: wlan_airtime is in ms, aggr_limit is in 0.25 ms.
109 * When wlan_airtime is less than 4ms, aggregation limit has to be
110 * adjusted half of wlan_airtime to ensure that the aggregation can fit
111 * without collision with BT traffic.
113 if ((wlan_airtime <= 4) &&
114 (!mci->aggr_limit || (mci->aggr_limit > (2 * wlan_airtime))))
115 mci->aggr_limit = 2 * wlan_airtime;
118 static void ath_mci_update_scheme(struct ath_softc *sc)
120 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
121 struct ath_btcoex *btcoex = &sc->btcoex;
122 struct ath_mci_profile *mci = &btcoex->mci;
123 struct ath_mci_profile_info *info;
124 u32 num_profile = NUM_PROF(mci);
126 if (num_profile == 1) {
127 info = list_first_entry(&mci->info,
128 struct ath_mci_profile_info,
130 if (mci->num_sco && info->T == 12) {
132 ath_dbg(common, ATH_DBG_MCI,
133 "Single SCO, aggregation limit 2 ms\n");
134 } else if ((info->type == MCI_GPM_COEX_PROFILE_BNEP) &&
136 btcoex->btcoex_period = 60;
137 ath_dbg(common, ATH_DBG_MCI,
138 "Single slave PAN/FTP, bt period 60 ms\n");
139 } else if ((info->type == MCI_GPM_COEX_PROFILE_HID) &&
140 (info->T > 0 && info->T < 50) &&
141 (info->A > 1 || info->W > 1)) {
142 btcoex->duty_cycle = 30;
144 ath_dbg(common, ATH_DBG_MCI,
145 "Multiple attempt/timeout single HID "
146 "aggregation limit 2 ms dutycycle 30%%\n");
148 } else if ((num_profile == 2) && (mci->num_hid == 2)) {
149 btcoex->duty_cycle = 30;
151 ath_dbg(common, ATH_DBG_MCI,
152 "Two HIDs aggregation limit 2 ms dutycycle 30%%\n");
153 } else if (num_profile > 3) {
155 ath_dbg(common, ATH_DBG_MCI,
156 "Three or more profiles aggregation limit 1.5 ms\n");
159 if (IS_CHAN_2GHZ(sc->sc_ah->curchan)) {
160 if (IS_CHAN_HT(sc->sc_ah->curchan))
161 ath_mci_adjust_aggr_limit(btcoex);
163 btcoex->btcoex_period >>= 1;
166 ath9k_hw_btcoex_disable(sc->sc_ah);
167 ath9k_btcoex_timer_pause(sc);
169 if (IS_CHAN_5GHZ(sc->sc_ah->curchan))
172 btcoex->duty_cycle += (mci->num_bdr ? ATH_MCI_MAX_DUTY_CYCLE : 0);
173 if (btcoex->duty_cycle > ATH_MCI_MAX_DUTY_CYCLE)
174 btcoex->duty_cycle = ATH_MCI_MAX_DUTY_CYCLE;
176 btcoex->btcoex_period *= 1000;
177 btcoex->btcoex_no_stomp = btcoex->btcoex_period *
178 (100 - btcoex->duty_cycle) / 100;
180 ath9k_hw_btcoex_enable(sc->sc_ah);
181 ath9k_btcoex_timer_resume(sc);
184 void ath_mci_process_profile(struct ath_softc *sc,
185 struct ath_mci_profile_info *info)
187 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
188 struct ath_btcoex *btcoex = &sc->btcoex;
189 struct ath_mci_profile *mci = &btcoex->mci;
192 if (!ath_mci_add_profile(common, mci, info))
195 ath_mci_del_profile(common, mci, info);
197 btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD;
198 mci->aggr_limit = mci->num_sco ? 6 : 0;
200 btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
201 btcoex->duty_cycle = ath_mci_duty_cycle[NUM_PROF(mci)];
203 btcoex->bt_stomp_type = mci->num_mgmt ? ATH_BTCOEX_STOMP_ALL :
204 ATH_BTCOEX_STOMP_LOW;
205 btcoex->duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
208 ath_mci_update_scheme(sc);
211 void ath_mci_process_status(struct ath_softc *sc,
212 struct ath_mci_profile_status *status)
214 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
215 struct ath_btcoex *btcoex = &sc->btcoex;
216 struct ath_mci_profile *mci = &btcoex->mci;
217 struct ath_mci_profile_info info;
218 int i = 0, old_num_mgmt = mci->num_mgmt;
220 /* Link status type are not handled */
221 if (status->is_link) {
222 ath_dbg(common, ATH_DBG_MCI,
223 "Skip link type status update\n");
227 memset(&info, 0, sizeof(struct ath_mci_profile_info));
229 info.conn_handle = status->conn_handle;
230 if (ath_mci_find_profile(mci, &info)) {
231 ath_dbg(common, ATH_DBG_MCI,
232 "Skip non link state update for existing profile %d\n",
233 status->conn_handle);
236 if (status->conn_handle >= ATH_MCI_MAX_PROFILE) {
237 ath_dbg(common, ATH_DBG_MCI,
238 "Ignore too many non-link update\n");
241 if (status->is_critical)
242 __set_bit(status->conn_handle, mci->status);
244 __clear_bit(status->conn_handle, mci->status);
248 if (test_bit(i, mci->status))
250 } while (++i < ATH_MCI_MAX_PROFILE);
252 if (old_num_mgmt != mci->num_mgmt)
253 ath_mci_update_scheme(sc);