[deliverable/linux.git] / drivers / net / wireless / ath / ath9k / mci.c

/*
 * 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 <linux/dma-mapping.h>
#include <linux/slab.h>

#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);
}


static int ath_mci_buf_alloc(struct ath_softc *sc, struct ath_mci_buf *buf)
{
	int error = 0;

	buf->bf_addr = dma_alloc_coherent(sc->dev, buf->bf_len,
					  &buf->bf_paddr, GFP_KERNEL);

	if (buf->bf_addr == NULL) {
		error = -ENOMEM;
		goto fail;
	}

	return 0;

fail:
	memset(buf, 0, sizeof(*buf));
	return error;
}

static void ath_mci_buf_free(struct ath_softc *sc, struct ath_mci_buf *buf)
{
	if (buf->bf_addr) {
		dma_free_coherent(sc->dev, buf->bf_len, buf->bf_addr,
							buf->bf_paddr);
		memset(buf, 0, sizeof(*buf));
	}
}

int ath_mci_setup(struct ath_softc *sc)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_mci_coex *mci = &sc->mci_coex;
	int error = 0;

	mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE;

	if (ath_mci_buf_alloc(sc, &mci->sched_buf)) {
		ath_dbg(common, ATH_DBG_FATAL, "MCI buffer alloc failed\n");
		error = -ENOMEM;
		goto fail;
	}

	mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE;

	memset(mci->sched_buf.bf_addr, MCI_GPM_RSVD_PATTERN,
						mci->sched_buf.bf_len);

	mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE;
	mci->gpm_buf.bf_addr = (u8 *)mci->sched_buf.bf_addr +
							mci->sched_buf.bf_len;
	mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len;

	/* initialize the buffer */
	memset(mci->gpm_buf.bf_addr, MCI_GPM_RSVD_PATTERN, mci->gpm_buf.bf_len);

	ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr,
			 mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
			 mci->sched_buf.bf_paddr);
fail:
	return error;
}

void ath_mci_cleanup(struct ath_softc *sc)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath_mci_coex *mci = &sc->mci_coex;

	/*
	 * both schedule and gpm buffers will be released
	 */
	ath_mci_buf_free(sc, &mci->sched_buf);
	ar9003_mci_cleanup(ah);
}
Commit	Line	Data
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
9e25365f MSS	17	#include <linux/dma-mapping.h>
	18	#include <linux/slab.h>
	19
7dc181c2 RM	20	#include "ath9k.h"
	21	#include "mci.h"
	22
	23	u8 ath_mci_duty_cycle[] = { 0, 50, 60, 70, 80, 85, 90, 95, 98 };
	24
	25	static struct ath_mci_profile_info*
	26	ath_mci_find_profile(struct ath_mci_profile *mci,
	27	struct ath_mci_profile_info *info)
	28	{
	29	struct ath_mci_profile_info *entry;
	30
	31	list_for_each_entry(entry, &mci->info, list) {
	32	if (entry->conn_handle == info->conn_handle)
	33	break;
	34	}
	35	return entry;
	36	}
	37
	38	static bool ath_mci_add_profile(struct ath_common *common,
	39	struct ath_mci_profile *mci,
	40	struct ath_mci_profile_info *info)
	41	{
	42	struct ath_mci_profile_info *entry;
	43
	44	if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
	45	(info->type == MCI_GPM_COEX_PROFILE_VOICE)) {
	46	ath_dbg(common, ATH_DBG_MCI,
	47	"Too many SCO profile, failed to add new profile\n");
	48	return false;
	49	}
	50
	51	if (((NUM_PROF(mci) - mci->num_sco) == ATH_MCI_MAX_ACL_PROFILE) &&
	52	(info->type != MCI_GPM_COEX_PROFILE_VOICE)) {
	53	ath_dbg(common, ATH_DBG_MCI,
	54	"Too many ACL profile, failed to add new profile\n");
	55	return false;
	56	}
	57
	58	entry = ath_mci_find_profile(mci, info);
	59
	60	if (entry)
	61	memcpy(entry, info, 10);
	62	else {
	63	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
	64	if (!entry)
	65	return false;
	66
	67	memcpy(entry, info, 10);
	68	INC_PROF(mci, info);
	69	list_add_tail(&info->list, &mci->info);
	70	}
	71	return true;
	72	}
	73
	74	static void ath_mci_del_profile(struct ath_common *common,
	75	struct ath_mci_profile *mci,
	76	struct ath_mci_profile_info *info)
	77	{
	78	struct ath_mci_profile_info *entry;
	79
	80	entry = ath_mci_find_profile(mci, info);
	81
	82	if (!entry) {
	83	ath_dbg(common, ATH_DBG_MCI,
84	"Profile to be deleted not found\n");
85	return;
86	}
87	DEC_PROF(mci, entry);
88	list_del(&entry->list);
89	kfree(entry);
90	}
91
92	void ath_mci_flush_profile(struct ath_mci_profile *mci)
93	{
94	struct ath_mci_profile_info info, tinfo;
95
96	list_for_each_entry_safe(info, tinfo, &mci->info, list) {
97	list_del(&info->list);
98	DEC_PROF(mci, info);
99	kfree(info);
100	}
101	mci->aggr_limit = 0;
102	}
103
104	static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex)
105	{
106	struct ath_mci_profile *mci = &btcoex->mci;
107	u32 wlan_airtime = btcoex->btcoex_period *
108	(100 - btcoex->duty_cycle) / 100;
109
110	/*
111	* Scale: wlan_airtime is in ms, aggr_limit is in 0.25 ms.
112	* When wlan_airtime is less than 4ms, aggregation limit has to be
113	* adjusted half of wlan_airtime to ensure that the aggregation can fit
114	* without collision with BT traffic.
115	*/
116	if ((wlan_airtime <= 4) &&
117	(!mci->aggr_limit \|\| (mci->aggr_limit > (2 * wlan_airtime))))
118	mci->aggr_limit = 2 * wlan_airtime;
119	}
120
121	static void ath_mci_update_scheme(struct ath_softc *sc)
122	{
123	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
124	struct ath_btcoex *btcoex = &sc->btcoex;
125	struct ath_mci_profile *mci = &btcoex->mci;
126	struct ath_mci_profile_info *info;
127	u32 num_profile = NUM_PROF(mci);
128
129	if (num_profile == 1) {
130	info = list_first_entry(&mci->info,
131	struct ath_mci_profile_info,
132	list);
133	if (mci->num_sco && info->T == 12) {
134	mci->aggr_limit = 8;
135	ath_dbg(common, ATH_DBG_MCI,
136	"Single SCO, aggregation limit 2 ms\n");
137	} else if ((info->type == MCI_GPM_COEX_PROFILE_BNEP) &&
138	!info->master) {
139	btcoex->btcoex_period = 60;
140	ath_dbg(common, ATH_DBG_MCI,
141	"Single slave PAN/FTP, bt period 60 ms\n");
142	} else if ((info->type == MCI_GPM_COEX_PROFILE_HID) &&
143	(info->T > 0 && info->T < 50) &&
144	(info->A > 1 \|\| info->W > 1)) {
145	btcoex->duty_cycle = 30;
146	mci->aggr_limit = 8;
147	ath_dbg(common, ATH_DBG_MCI,
148	"Multiple attempt/timeout single HID "
149	"aggregation limit 2 ms dutycycle 30%%\n");
150	}
151	} else if ((num_profile == 2) && (mci->num_hid == 2)) {
152	btcoex->duty_cycle = 30;
153	mci->aggr_limit = 8;
154	ath_dbg(common, ATH_DBG_MCI,
155	"Two HIDs aggregation limit 2 ms dutycycle 30%%\n");
156	} else if (num_profile > 3) {
157	mci->aggr_limit = 6;
158	ath_dbg(common, ATH_DBG_MCI,
159	"Three or more profiles aggregation limit 1.5 ms\n");
160	}
161
162	if (IS_CHAN_2GHZ(sc->sc_ah->curchan)) {
163	if (IS_CHAN_HT(sc->sc_ah->curchan))
164	ath_mci_adjust_aggr_limit(btcoex);
165	else
166	btcoex->btcoex_period >>= 1;
167	}
168
169	ath9k_hw_btcoex_disable(sc->sc_ah);
170	ath9k_btcoex_timer_pause(sc);
171
172	if (IS_CHAN_5GHZ(sc->sc_ah->curchan))
173	return;
174
175	btcoex->duty_cycle += (mci->num_bdr ? ATH_MCI_MAX_DUTY_CYCLE : 0);
176	if (btcoex->duty_cycle > ATH_MCI_MAX_DUTY_CYCLE)
177	btcoex->duty_cycle = ATH_MCI_MAX_DUTY_CYCLE;
178
179	btcoex->btcoex_period *= 1000;
180	btcoex->btcoex_no_stomp = btcoex->btcoex_period *
181	(100 - btcoex->duty_cycle) / 100;
182
183	ath9k_hw_btcoex_enable(sc->sc_ah);
184	ath9k_btcoex_timer_resume(sc);
185	}
186
187	void ath_mci_process_profile(struct ath_softc *sc,
188	struct ath_mci_profile_info *info)
189	{
190	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
191	struct ath_btcoex *btcoex = &sc->btcoex;
192	struct ath_mci_profile *mci = &btcoex->mci;
193
194	if (info->start) {
195	if (!ath_mci_add_profile(common, mci, info))
196	return;
197	} else
198	ath_mci_del_profile(common, mci, info);
199
200	btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD;
201	mci->aggr_limit = mci->num_sco ? 6 : 0;
202	if (NUM_PROF(mci)) {
203	btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
204	btcoex->duty_cycle = ath_mci_duty_cycle[NUM_PROF(mci)];
205	} else {
206	btcoex->bt_stomp_type = mci->num_mgmt ? ATH_BTCOEX_STOMP_ALL :
207	ATH_BTCOEX_STOMP_LOW;
208	btcoex->duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
209	}
210
211	ath_mci_update_scheme(sc);
212	}
213
214	void ath_mci_process_status(struct ath_softc *sc,
215	struct ath_mci_profile_status *status)
216	{
217	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
218	struct ath_btcoex *btcoex = &sc->btcoex;
219	struct ath_mci_profile *mci = &btcoex->mci;
220	struct ath_mci_profile_info info;
221	int i = 0, old_num_mgmt = mci->num_mgmt;
222
223	/* Link status type are not handled */
224	if (status->is_link) {
225	ath_dbg(common, ATH_DBG_MCI,
226	"Skip link type status update\n");
227	return;
228	}
229
230	memset(&info, 0, sizeof(struct ath_mci_profile_info));
231
232	info.conn_handle = status->conn_handle;
233	if (ath_mci_find_profile(mci, &info)) {
234	ath_dbg(common, ATH_DBG_MCI,
235	"Skip non link state update for existing profile %d\n",
236	status->conn_handle);
237	return;
238	}
239	if (status->conn_handle >= ATH_MCI_MAX_PROFILE) {
240	ath_dbg(common, ATH_DBG_MCI,
241	"Ignore too many non-link update\n");
242	return;
243	}
244	if (status->is_critical)
245	__set_bit(status->conn_handle, mci->status);
246	else
247	__clear_bit(status->conn_handle, mci->status);
248
249	mci->num_mgmt = 0;
250	do {
251	if (test_bit(i, mci->status))
252	mci->num_mgmt++;
253	} while (++i < ATH_MCI_MAX_PROFILE);
254
255	if (old_num_mgmt != mci->num_mgmt)
256	ath_mci_update_scheme(sc);
257	}
9e25365f MSS	258
	259
	260	static int ath_mci_buf_alloc(struct ath_softc sc, struct ath_mci_buf buf)
	261	{
	262	int error = 0;
	263
	264	buf->bf_addr = dma_alloc_coherent(sc->dev, buf->bf_len,
	265	&buf->bf_paddr, GFP_KERNEL);
	266
	267	if (buf->bf_addr == NULL) {
	268	error = -ENOMEM;
	269	goto fail;
	270	}
	271
	272	return 0;
	273
	274	fail:
	275	memset(buf, 0, sizeof(*buf));
	276	return error;
	277	}
	278
	279	static void ath_mci_buf_free(struct ath_softc sc, struct ath_mci_buf buf)
	280	{
	281	if (buf->bf_addr) {
	282	dma_free_coherent(sc->dev, buf->bf_len, buf->bf_addr,
	283	buf->bf_paddr);
	284	memset(buf, 0, sizeof(*buf));
	285	}
	286	}
	287
	288	int ath_mci_setup(struct ath_softc *sc)
	289	{
	290	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	291	struct ath_mci_coex *mci = &sc->mci_coex;
	292	int error = 0;
	293
	294	mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE;
	295
	296	if (ath_mci_buf_alloc(sc, &mci->sched_buf)) {
	297	ath_dbg(common, ATH_DBG_FATAL, "MCI buffer alloc failed\n");
	298	error = -ENOMEM;
	299	goto fail;
	300	}
	301
	302	mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE;
	303
	304	memset(mci->sched_buf.bf_addr, MCI_GPM_RSVD_PATTERN,
	305	mci->sched_buf.bf_len);
	306
	307	mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE;
	308	mci->gpm_buf.bf_addr = (u8 *)mci->sched_buf.bf_addr +
	309	mci->sched_buf.bf_len;
	310	mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len;
	311
	312	/* initialize the buffer */
	313	memset(mci->gpm_buf.bf_addr, MCI_GPM_RSVD_PATTERN, mci->gpm_buf.bf_len);
	314
	315	ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr,
	316	mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
	317	mci->sched_buf.bf_paddr);
	318	fail:
	319	return error;
	320	}
	321
322	void ath_mci_cleanup(struct ath_softc *sc)
323	{
324	struct ath_hw *ah = sc->sc_ah;
325	struct ath_mci_coex *mci = &sc->mci_coex;
326
327	/*
328	* both schedule and gpm buffers will be released
329	*/
330	ath_mci_buf_free(sc, &mci->sched_buf);
331	ar9003_mci_cleanup(ah);
332	}