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7dc181c2 RM |
1 | /* |
2 | * Copyright (c) 2010-2011 Atheros Communications Inc. | |
3 | * | |
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. | |
7 | * | |
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. | |
15 | */ | |
16 | ||
17 | #include "ath9k.h" | |
18 | #include "mci.h" | |
19 | ||
20 | u8 ath_mci_duty_cycle[] = { 0, 50, 60, 70, 80, 85, 90, 95, 98 }; | |
21 | ||
22 | static struct ath_mci_profile_info* | |
23 | ath_mci_find_profile(struct ath_mci_profile *mci, | |
24 | struct ath_mci_profile_info *info) | |
25 | { | |
26 | struct ath_mci_profile_info *entry; | |
27 | ||
28 | list_for_each_entry(entry, &mci->info, list) { | |
29 | if (entry->conn_handle == info->conn_handle) | |
30 | break; | |
31 | } | |
32 | return entry; | |
33 | } | |
34 | ||
35 | static bool ath_mci_add_profile(struct ath_common *common, | |
36 | struct ath_mci_profile *mci, | |
37 | struct ath_mci_profile_info *info) | |
38 | { | |
39 | struct ath_mci_profile_info *entry; | |
40 | ||
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"); | |
45 | return false; | |
46 | } | |
47 | ||
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"); | |
52 | return false; | |
53 | } | |
54 | ||
55 | entry = ath_mci_find_profile(mci, info); | |
56 | ||
57 | if (entry) | |
58 | memcpy(entry, info, 10); | |
59 | else { | |
60 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); | |
61 | if (!entry) | |
62 | return false; | |
63 | ||
64 | memcpy(entry, info, 10); | |
65 | INC_PROF(mci, info); | |
66 | list_add_tail(&info->list, &mci->info); | |
67 | } | |
68 | return true; | |
69 | } | |
70 | ||
71 | static void ath_mci_del_profile(struct ath_common *common, | |
72 | struct ath_mci_profile *mci, | |
73 | struct ath_mci_profile_info *info) | |
74 | { | |
75 | struct ath_mci_profile_info *entry; | |
76 | ||
77 | entry = ath_mci_find_profile(mci, info); | |
78 | ||
79 | if (!entry) { | |
80 | ath_dbg(common, ATH_DBG_MCI, | |
81 | "Profile to be deleted not found\n"); | |
82 | return; | |
83 | } | |
84 | DEC_PROF(mci, entry); | |
85 | list_del(&entry->list); | |
86 | kfree(entry); | |
87 | } | |
88 | ||
89 | void ath_mci_flush_profile(struct ath_mci_profile *mci) | |
90 | { | |
91 | struct ath_mci_profile_info *info, *tinfo; | |
92 | ||
93 | list_for_each_entry_safe(info, tinfo, &mci->info, list) { | |
94 | list_del(&info->list); | |
95 | DEC_PROF(mci, info); | |
96 | kfree(info); | |
97 | } | |
98 | mci->aggr_limit = 0; | |
99 | } | |
100 | ||
101 | static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex) | |
102 | { | |
103 | struct ath_mci_profile *mci = &btcoex->mci; | |
104 | u32 wlan_airtime = btcoex->btcoex_period * | |
105 | (100 - btcoex->duty_cycle) / 100; | |
106 | ||
107 | /* | |
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. | |
112 | */ | |
113 | if ((wlan_airtime <= 4) && | |
114 | (!mci->aggr_limit || (mci->aggr_limit > (2 * wlan_airtime)))) | |
115 | mci->aggr_limit = 2 * wlan_airtime; | |
116 | } | |
117 | ||
118 | static void ath_mci_update_scheme(struct ath_softc *sc) | |
119 | { | |
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); | |
125 | ||
126 | if (num_profile == 1) { | |
127 | info = list_first_entry(&mci->info, | |
128 | struct ath_mci_profile_info, | |
129 | list); | |
130 | if (mci->num_sco && info->T == 12) { | |
131 | mci->aggr_limit = 8; | |
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) && | |
135 | !info->master) { | |
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; | |
143 | mci->aggr_limit = 8; | |
144 | ath_dbg(common, ATH_DBG_MCI, | |
145 | "Multiple attempt/timeout single HID " | |
146 | "aggregation limit 2 ms dutycycle 30%%\n"); | |
147 | } | |
148 | } else if ((num_profile == 2) && (mci->num_hid == 2)) { | |
149 | btcoex->duty_cycle = 30; | |
150 | mci->aggr_limit = 8; | |
151 | ath_dbg(common, ATH_DBG_MCI, | |
152 | "Two HIDs aggregation limit 2 ms dutycycle 30%%\n"); | |
153 | } else if (num_profile > 3) { | |
154 | mci->aggr_limit = 6; | |
155 | ath_dbg(common, ATH_DBG_MCI, | |
156 | "Three or more profiles aggregation limit 1.5 ms\n"); | |
157 | } | |
158 | ||
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); | |
162 | else | |
163 | btcoex->btcoex_period >>= 1; | |
164 | } | |
165 | ||
166 | ath9k_hw_btcoex_disable(sc->sc_ah); | |
167 | ath9k_btcoex_timer_pause(sc); | |
168 | ||
169 | if (IS_CHAN_5GHZ(sc->sc_ah->curchan)) | |
170 | return; | |
171 | ||
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; | |
175 | ||
176 | btcoex->btcoex_period *= 1000; | |
177 | btcoex->btcoex_no_stomp = btcoex->btcoex_period * | |
178 | (100 - btcoex->duty_cycle) / 100; | |
179 | ||
180 | ath9k_hw_btcoex_enable(sc->sc_ah); | |
181 | ath9k_btcoex_timer_resume(sc); | |
182 | } | |
183 | ||
184 | void ath_mci_process_profile(struct ath_softc *sc, | |
185 | struct ath_mci_profile_info *info) | |
186 | { | |
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; | |
190 | ||
191 | if (info->start) { | |
192 | if (!ath_mci_add_profile(common, mci, info)) | |
193 | return; | |
194 | } else | |
195 | ath_mci_del_profile(common, mci, info); | |
196 | ||
197 | btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD; | |
198 | mci->aggr_limit = mci->num_sco ? 6 : 0; | |
199 | if (NUM_PROF(mci)) { | |
200 | btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW; | |
201 | btcoex->duty_cycle = ath_mci_duty_cycle[NUM_PROF(mci)]; | |
202 | } else { | |
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; | |
206 | } | |
207 | ||
208 | ath_mci_update_scheme(sc); | |
209 | } | |
210 | ||
211 | void ath_mci_process_status(struct ath_softc *sc, | |
212 | struct ath_mci_profile_status *status) | |
213 | { | |
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; | |
219 | ||
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"); | |
224 | return; | |
225 | } | |
226 | ||
227 | memset(&info, 0, sizeof(struct ath_mci_profile_info)); | |
228 | ||
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); | |
234 | return; | |
235 | } | |
236 | if (status->conn_handle >= ATH_MCI_MAX_PROFILE) { | |
237 | ath_dbg(common, ATH_DBG_MCI, | |
238 | "Ignore too many non-link update\n"); | |
239 | return; | |
240 | } | |
241 | if (status->is_critical) | |
242 | __set_bit(status->conn_handle, mci->status); | |
243 | else | |
244 | __clear_bit(status->conn_handle, mci->status); | |
245 | ||
246 | mci->num_mgmt = 0; | |
247 | do { | |
248 | if (test_bit(i, mci->status)) | |
249 | mci->num_mgmt++; | |
250 | } while (++i < ATH_MCI_MAX_PROFILE); | |
251 | ||
252 | if (old_num_mgmt != mci->num_mgmt) | |
253 | ath_mci_update_scheme(sc); | |
254 | } |