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/*
* 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);
}
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