--- /dev/null
+/*
+ * Copyright (c) 2010-2011 Atheros Communications Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "ath9k.h"
+#include "mci.h"
+
+u8 ath_mci_duty_cycle[] = { 0, 50, 60, 70, 80, 85, 90, 95, 98 };
+
+static struct ath_mci_profile_info*
+ath_mci_find_profile(struct ath_mci_profile *mci,
+ struct ath_mci_profile_info *info)
+{
+ struct ath_mci_profile_info *entry;
+
+ list_for_each_entry(entry, &mci->info, list) {
+ if (entry->conn_handle == info->conn_handle)
+ break;
+ }
+ return entry;
+}
+
+static bool ath_mci_add_profile(struct ath_common *common,
+ struct ath_mci_profile *mci,
+ struct ath_mci_profile_info *info)
+{
+ struct ath_mci_profile_info *entry;
+
+ if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
+ (info->type == MCI_GPM_COEX_PROFILE_VOICE)) {
+ ath_dbg(common, ATH_DBG_MCI,
+ "Too many SCO profile, failed to add new profile\n");
+ return false;
+ }
+
+ if (((NUM_PROF(mci) - mci->num_sco) == ATH_MCI_MAX_ACL_PROFILE) &&
+ (info->type != MCI_GPM_COEX_PROFILE_VOICE)) {
+ ath_dbg(common, ATH_DBG_MCI,
+ "Too many ACL profile, failed to add new profile\n");
+ return false;
+ }
+
+ entry = ath_mci_find_profile(mci, info);
+
+ if (entry)
+ memcpy(entry, info, 10);
+ else {
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry)
+ return false;
+
+ memcpy(entry, info, 10);
+ INC_PROF(mci, info);
+ list_add_tail(&info->list, &mci->info);
+ }
+ return true;
+}
+
+static void ath_mci_del_profile(struct ath_common *common,
+ struct ath_mci_profile *mci,
+ struct ath_mci_profile_info *info)
+{
+ struct ath_mci_profile_info *entry;
+
+ entry = ath_mci_find_profile(mci, info);
+
+ if (!entry) {
+ ath_dbg(common, ATH_DBG_MCI,
+ "Profile to be deleted not found\n");
+ return;
+ }
+ DEC_PROF(mci, entry);
+ list_del(&entry->list);
+ kfree(entry);
+}
+
+void ath_mci_flush_profile(struct ath_mci_profile *mci)
+{
+ struct ath_mci_profile_info *info, *tinfo;
+
+ list_for_each_entry_safe(info, tinfo, &mci->info, list) {
+ list_del(&info->list);
+ DEC_PROF(mci, info);
+ kfree(info);
+ }
+ mci->aggr_limit = 0;
+}
+
+static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex)
+{
+ struct ath_mci_profile *mci = &btcoex->mci;
+ u32 wlan_airtime = btcoex->btcoex_period *
+ (100 - btcoex->duty_cycle) / 100;
+
+ /*
+ * Scale: wlan_airtime is in ms, aggr_limit is in 0.25 ms.
+ * When wlan_airtime is less than 4ms, aggregation limit has to be
+ * adjusted half of wlan_airtime to ensure that the aggregation can fit
+ * without collision with BT traffic.
+ */
+ if ((wlan_airtime <= 4) &&
+ (!mci->aggr_limit || (mci->aggr_limit > (2 * wlan_airtime))))
+ mci->aggr_limit = 2 * wlan_airtime;
+}
+
+static void ath_mci_update_scheme(struct ath_softc *sc)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_btcoex *btcoex = &sc->btcoex;
+ struct ath_mci_profile *mci = &btcoex->mci;
+ struct ath_mci_profile_info *info;
+ u32 num_profile = NUM_PROF(mci);
+
+ if (num_profile == 1) {
+ info = list_first_entry(&mci->info,
+ struct ath_mci_profile_info,
+ list);
+ if (mci->num_sco && info->T == 12) {
+ mci->aggr_limit = 8;
+ ath_dbg(common, ATH_DBG_MCI,
+ "Single SCO, aggregation limit 2 ms\n");
+ } else if ((info->type == MCI_GPM_COEX_PROFILE_BNEP) &&
+ !info->master) {
+ btcoex->btcoex_period = 60;
+ ath_dbg(common, ATH_DBG_MCI,
+ "Single slave PAN/FTP, bt period 60 ms\n");
+ } else if ((info->type == MCI_GPM_COEX_PROFILE_HID) &&
+ (info->T > 0 && info->T < 50) &&
+ (info->A > 1 || info->W > 1)) {
+ btcoex->duty_cycle = 30;
+ mci->aggr_limit = 8;
+ ath_dbg(common, ATH_DBG_MCI,
+ "Multiple attempt/timeout single HID "
+ "aggregation limit 2 ms dutycycle 30%%\n");
+ }
+ } else if ((num_profile == 2) && (mci->num_hid == 2)) {
+ btcoex->duty_cycle = 30;
+ mci->aggr_limit = 8;
+ ath_dbg(common, ATH_DBG_MCI,
+ "Two HIDs aggregation limit 2 ms dutycycle 30%%\n");
+ } else if (num_profile > 3) {
+ mci->aggr_limit = 6;
+ ath_dbg(common, ATH_DBG_MCI,
+ "Three or more profiles aggregation limit 1.5 ms\n");
+ }
+
+ if (IS_CHAN_2GHZ(sc->sc_ah->curchan)) {
+ if (IS_CHAN_HT(sc->sc_ah->curchan))
+ ath_mci_adjust_aggr_limit(btcoex);
+ else
+ btcoex->btcoex_period >>= 1;
+ }
+
+ ath9k_hw_btcoex_disable(sc->sc_ah);
+ ath9k_btcoex_timer_pause(sc);
+
+ if (IS_CHAN_5GHZ(sc->sc_ah->curchan))
+ return;
+
+ btcoex->duty_cycle += (mci->num_bdr ? ATH_MCI_MAX_DUTY_CYCLE : 0);
+ if (btcoex->duty_cycle > ATH_MCI_MAX_DUTY_CYCLE)
+ btcoex->duty_cycle = ATH_MCI_MAX_DUTY_CYCLE;
+
+ btcoex->btcoex_period *= 1000;
+ btcoex->btcoex_no_stomp = btcoex->btcoex_period *
+ (100 - btcoex->duty_cycle) / 100;
+
+ ath9k_hw_btcoex_enable(sc->sc_ah);
+ ath9k_btcoex_timer_resume(sc);
+}
+
+void ath_mci_process_profile(struct ath_softc *sc,
+ struct ath_mci_profile_info *info)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_btcoex *btcoex = &sc->btcoex;
+ struct ath_mci_profile *mci = &btcoex->mci;
+
+ if (info->start) {
+ if (!ath_mci_add_profile(common, mci, info))
+ return;
+ } else
+ ath_mci_del_profile(common, mci, info);
+
+ btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD;
+ mci->aggr_limit = mci->num_sco ? 6 : 0;
+ if (NUM_PROF(mci)) {
+ btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
+ btcoex->duty_cycle = ath_mci_duty_cycle[NUM_PROF(mci)];
+ } else {
+ btcoex->bt_stomp_type = mci->num_mgmt ? ATH_BTCOEX_STOMP_ALL :
+ ATH_BTCOEX_STOMP_LOW;
+ btcoex->duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
+ }
+
+ ath_mci_update_scheme(sc);
+}
+
+void ath_mci_process_status(struct ath_softc *sc,
+ struct ath_mci_profile_status *status)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_btcoex *btcoex = &sc->btcoex;
+ struct ath_mci_profile *mci = &btcoex->mci;
+ struct ath_mci_profile_info info;
+ int i = 0, old_num_mgmt = mci->num_mgmt;
+
+ /* Link status type are not handled */
+ if (status->is_link) {
+ ath_dbg(common, ATH_DBG_MCI,
+ "Skip link type status update\n");
+ return;
+ }
+
+ memset(&info, 0, sizeof(struct ath_mci_profile_info));
+
+ info.conn_handle = status->conn_handle;
+ if (ath_mci_find_profile(mci, &info)) {
+ ath_dbg(common, ATH_DBG_MCI,
+ "Skip non link state update for existing profile %d\n",
+ status->conn_handle);
+ return;
+ }
+ if (status->conn_handle >= ATH_MCI_MAX_PROFILE) {
+ ath_dbg(common, ATH_DBG_MCI,
+ "Ignore too many non-link update\n");
+ return;
+ }
+ if (status->is_critical)
+ __set_bit(status->conn_handle, mci->status);
+ else
+ __clear_bit(status->conn_handle, mci->status);
+
+ mci->num_mgmt = 0;
+ do {
+ if (test_bit(i, mci->status))
+ mci->num_mgmt++;
+ } while (++i < ATH_MCI_MAX_PROFILE);
+
+ if (old_num_mgmt != mci->num_mgmt)
+ ath_mci_update_scheme(sc);
+}
--- /dev/null
+/*
+ * Copyright (c) 2010-2011 Atheros Communications Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef MCI_H
+#define MCI_H
+
+#define ATH_MCI_DEF_BT_PERIOD 40
+#define ATH_MCI_BDR_DUTY_CYCLE 20
+#define ATH_MCI_MAX_DUTY_CYCLE 90
+
+#define ATH_MCI_DEF_AGGR_LIMIT 6 /* in 0.24 ms */
+#define ATH_MCI_MAX_ACL_PROFILE 7
+#define ATH_MCI_MAX_SCO_PROFILE 1
+#define ATH_MCI_MAX_PROFILE (ATH_MCI_MAX_ACL_PROFILE +\
+ ATH_MCI_MAX_SCO_PROFILE)
+
+#define INC_PROF(_mci, _info) do { \
+ switch (_info->type) { \
+ case MCI_GPM_COEX_PROFILE_RFCOMM:\
+ _mci->num_other_acl++; \
+ break; \
+ case MCI_GPM_COEX_PROFILE_A2DP: \
+ _mci->num_a2dp++; \
+ if (!_info->edr) \
+ _mci->num_bdr++; \
+ break; \
+ case MCI_GPM_COEX_PROFILE_HID: \
+ _mci->num_hid++; \
+ break; \
+ case MCI_GPM_COEX_PROFILE_BNEP: \
+ _mci->num_pan++; \
+ break; \
+ case MCI_GPM_COEX_PROFILE_VOICE: \
+ _mci->num_sco++; \
+ break; \
+ default: \
+ break; \
+ } \
+ } while (0)
+
+#define DEC_PROF(_mci, _info) do { \
+ switch (_info->type) { \
+ case MCI_GPM_COEX_PROFILE_RFCOMM:\
+ _mci->num_other_acl--; \
+ break; \
+ case MCI_GPM_COEX_PROFILE_A2DP: \
+ _mci->num_a2dp--; \
+ if (!_info->edr) \
+ _mci->num_bdr--; \
+ break; \
+ case MCI_GPM_COEX_PROFILE_HID: \
+ _mci->num_hid--; \
+ break; \
+ case MCI_GPM_COEX_PROFILE_BNEP: \
+ _mci->num_pan--; \
+ break; \
+ case MCI_GPM_COEX_PROFILE_VOICE: \
+ _mci->num_sco--; \
+ break; \
+ default: \
+ break; \
+ } \
+ } while (0)
+
+#define NUM_PROF(_mci) (_mci->num_other_acl + _mci->num_a2dp + \
+ _mci->num_hid + _mci->num_pan + _mci->num_sco)
+
+struct ath_mci_profile_info {
+ u8 type;
+ u8 conn_handle;
+ bool start;
+ bool master;
+ bool edr;
+ u8 voice_type;
+ u16 T; /* Voice: Tvoice, HID: Tsniff, in slots */
+ u8 W; /* Voice: Wvoice, HID: Sniff timeout, in slots */
+ u8 A; /* HID: Sniff attempt, in slots */
+ struct list_head list;
+};
+
+struct ath_mci_profile_status {
+ bool is_critical;
+ bool is_link;
+ u8 conn_handle;
+};
+
+struct ath_mci_profile {
+ struct list_head info;
+ DECLARE_BITMAP(status, ATH_MCI_MAX_PROFILE);
+ u16 aggr_limit;
+ u8 num_mgmt;
+ u8 num_sco;
+ u8 num_a2dp;
+ u8 num_hid;
+ u8 num_pan;
+ u8 num_other_acl;
+ u8 num_bdr;
+};
+
+void ath_mci_flush_profile(struct ath_mci_profile *mci);
+void ath_mci_process_profile(struct ath_softc *sc,
+ struct ath_mci_profile_info *info);
+void ath_mci_process_status(struct ath_softc *sc,
+ struct ath_mci_profile_status *status);
+#endif
projects / cascardo / linux.git / commitdiff