[mirror_ubuntu-jammy-kernel.git] / drivers / net / wireless / ti / wlcore / ps.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * This file is part of wl1271
 *
 * Copyright (C) 2008-2009 Nokia Corporation
 *
 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
 */

#include "ps.h"
#include "io.h"
#include "tx.h"
#include "debug.h"

int wl1271_ps_set_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
		       enum wl1271_cmd_ps_mode mode)
{
	int ret;
	u16 timeout = wl->conf.conn.dynamic_ps_timeout;

	switch (mode) {
	case STATION_AUTO_PS_MODE:
	case STATION_POWER_SAVE_MODE:
		wl1271_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)",
			     mode, timeout);

		ret = wl1271_acx_wake_up_conditions(wl, wlvif,
					    wl->conf.conn.wake_up_event,
					    wl->conf.conn.listen_interval);
		if (ret < 0) {
			wl1271_error("couldn't set wake up conditions");
			return ret;
		}

		ret = wl1271_cmd_ps_mode(wl, wlvif, mode, timeout);
		if (ret < 0)
			return ret;

		set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);

		/*
		 * enable beacon early termination.
		 * Not relevant for 5GHz and for high rates.
		 */
		if ((wlvif->band == NL80211_BAND_2GHZ) &&
		    (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
			ret = wl1271_acx_bet_enable(wl, wlvif, true);
			if (ret < 0)
				return ret;
		}
		break;
	case STATION_ACTIVE_MODE:
		wl1271_debug(DEBUG_PSM, "leaving psm");

		/* disable beacon early termination */
		if ((wlvif->band == NL80211_BAND_2GHZ) &&
		    (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
			ret = wl1271_acx_bet_enable(wl, wlvif, false);
			if (ret < 0)
				return ret;
		}

		ret = wl1271_cmd_ps_mode(wl, wlvif, mode, 0);
		if (ret < 0)
			return ret;

		clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
		break;
	default:
		wl1271_warning("trying to set ps to unsupported mode %d", mode);
		ret = -EINVAL;
	}

	return ret;
}

static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid)
{
	int i;
	struct sk_buff *skb;
	struct ieee80211_tx_info *info;
	unsigned long flags;
	int filtered[NUM_TX_QUEUES];
	struct wl1271_link *lnk = &wl->links[hlid];

	/* filter all frames currently in the low level queues for this hlid */
	for (i = 0; i < NUM_TX_QUEUES; i++) {
		filtered[i] = 0;
		while ((skb = skb_dequeue(&lnk->tx_queue[i]))) {
			filtered[i]++;

			if (WARN_ON(wl12xx_is_dummy_packet(wl, skb)))
				continue;

			info = IEEE80211_SKB_CB(skb);
			info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
			info->status.rates[0].idx = -1;
			ieee80211_tx_status_ni(wl->hw, skb);
		}
	}

	spin_lock_irqsave(&wl->wl_lock, flags);
	for (i = 0; i < NUM_TX_QUEUES; i++) {
		wl->tx_queue_count[i] -= filtered[i];
		if (lnk->wlvif)
			lnk->wlvif->tx_queue_count[i] -= filtered[i];
	}
	spin_unlock_irqrestore(&wl->wl_lock, flags);

	wl1271_handle_tx_low_watermark(wl);
}

void wl12xx_ps_link_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
			  u8 hlid, bool clean_queues)
{
	struct ieee80211_sta *sta;
	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);

	if (WARN_ON_ONCE(wlvif->bss_type != BSS_TYPE_AP_BSS))
		return;

	if (!test_bit(hlid, wlvif->ap.sta_hlid_map) ||
	    test_bit(hlid, &wl->ap_ps_map))
		return;

	wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d pkts %d "
		     "clean_queues %d", hlid, wl->links[hlid].allocated_pkts,
		     clean_queues);

	rcu_read_lock();
	sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
	if (!sta) {
		wl1271_error("could not find sta %pM for starting ps",
			     wl->links[hlid].addr);
		rcu_read_unlock();
		return;
	}

	ieee80211_sta_ps_transition_ni(sta, true);
	rcu_read_unlock();

	/* do we want to filter all frames from this link's queues? */
	if (clean_queues)
		wl1271_ps_filter_frames(wl, hlid);

	__set_bit(hlid, &wl->ap_ps_map);
}

void wl12xx_ps_link_end(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid)
{
	struct ieee80211_sta *sta;
	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);

	if (!test_bit(hlid, &wl->ap_ps_map))
		return;

	wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid);

	__clear_bit(hlid, &wl->ap_ps_map);

	rcu_read_lock();
	sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
	if (!sta) {
		wl1271_error("could not find sta %pM for ending ps",
			     wl->links[hlid].addr);
		goto end;
	}

	ieee80211_sta_ps_transition_ni(sta, false);
end:
	rcu_read_unlock();
}
Commit	Line	Data
2b27bdcc	1	// SPDX-License-Identifier: GPL-2.0-only
f5fc0f86 LC	2	/*
	3	* This file is part of wl1271
	4	*
	5	* Copyright (C) 2008-2009 Nokia Corporation
	6	*
	7	* Contact: Luciano Coelho <luciano.coelho@nokia.com>
f5fc0f86 LC	8	*/
f5fc0f86 LC	9
00d20100 SL	10	#include "ps.h"
00d20100 SL	11	#include "io.h"
b622d992	12	#include "tx.h"
0f4e3122	13	#include "debug.h"
f5fc0f86	14
0603d891	15	int wl1271_ps_set_mode(struct wl1271 wl, struct wl12xx_vif wlvif,
248a0018	16	enum wl1271_cmd_ps_mode mode)
f5fc0f86 LC	17	{
f5fc0f86 LC	18	int ret;
f1d63a59	19	u16 timeout = wl->conf.conn.dynamic_ps_timeout;
f5fc0f86 LC	20
f5fc0f86 LC	21	switch (mode) {
f1d63a59	22	case STATION_AUTO_PS_MODE:
5c0dc2fc	23	case STATION_POWER_SAVE_MODE:
f1d63a59 ES	24	wl1271_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)",
f1d63a59 ES	25	mode, timeout);
1922167b	26
dae728fe ES	27	ret = wl1271_acx_wake_up_conditions(wl, wlvif,
	28	wl->conf.conn.wake_up_event,
	29	wl->conf.conn.listen_interval);
03f06b7e JO	30	if (ret < 0) {
	31	wl1271_error("couldn't set wake up conditions");
	32	return ret;
	33	}
	34
f1d63a59	35	ret = wl1271_cmd_ps_mode(wl, wlvif, mode, timeout);
f5fc0f86 LC	36	if (ret < 0)
	37	return ret;
	38
5c0dc2fc	39	set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
ed471d34	40
e832837b VG	41	/*
	42	* enable beacon early termination.
	43	* Not relevant for 5GHz and for high rates.
	44	*/
57fbcce3	45	if ((wlvif->band == NL80211_BAND_2GHZ) &&
e832837b	46	(wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
ed471d34 ES	47	ret = wl1271_acx_bet_enable(wl, wlvif, true);
	48	if (ret < 0)
	49	return ret;
	50	}
f5fc0f86 LC	51	break;
f5fc0f86 LC	52	case STATION_ACTIVE_MODE:
f5fc0f86	53	wl1271_debug(DEBUG_PSM, "leaving psm");
f5fc0f86	54
11f70f97	55	/* disable beacon early termination */
57fbcce3	56	if ((wlvif->band == NL80211_BAND_2GHZ) &&
e832837b	57	(wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
0603d891	58	ret = wl1271_acx_bet_enable(wl, wlvif, false);
0e44eb20 SL	59	if (ret < 0)
	60	return ret;
	61	}
11f70f97	62
f1d63a59	63	ret = wl1271_cmd_ps_mode(wl, wlvif, mode, 0);
f5fc0f86 LC	64	if (ret < 0)
	65	return ret;
	66
5c0dc2fc	67	clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
f5fc0f86	68	break;
f1d63a59 ES	69	default:
	70	wl1271_warning("trying to set ps to unsupported mode %d", mode);
	71	ret = -EINVAL;
f5fc0f86 LC	72	}
	73
	74	return ret;
	75	}
b622d992 AN	76
	77	static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid)
	78	{
f1a46384	79	int i;
b622d992 AN	80	struct sk_buff *skb;
	81	struct ieee80211_tx_info *info;
	82	unsigned long flags;
f1a46384	83	int filtered[NUM_TX_QUEUES];
8591d424	84	struct wl1271_link *lnk = &wl->links[hlid];
b622d992	85
f8e0af6b	86	/* filter all frames currently in the low level queues for this hlid */
b622d992	87	for (i = 0; i < NUM_TX_QUEUES; i++) {
f1a46384	88	filtered[i] = 0;
8591d424	89	while ((skb = skb_dequeue(&lnk->tx_queue[i]))) {
f8e0af6b AN	90	filtered[i]++;
	91
	92	if (WARN_ON(wl12xx_is_dummy_packet(wl, skb)))
	93	continue;
	94
b622d992 AN	95	info = IEEE80211_SKB_CB(skb);
	96	info->flags \|= IEEE80211_TX_STAT_TX_FILTERED;
	97	info->status.rates[0].idx = -1;
c27d3acc	98	ieee80211_tx_status_ni(wl->hw, skb);
b622d992 AN	99	}
	100	}
	101
	102	spin_lock_irqsave(&wl->wl_lock, flags);
8591d424	103	for (i = 0; i < NUM_TX_QUEUES; i++) {
f1a46384	104	wl->tx_queue_count[i] -= filtered[i];
8591d424 AN	105	if (lnk->wlvif)
	106	lnk->wlvif->tx_queue_count[i] -= filtered[i];
	107	}
b622d992 AN	108	spin_unlock_irqrestore(&wl->wl_lock, flags);
	109
	110	wl1271_handle_tx_low_watermark(wl);
	111	}
	112
6e8cd331 EP	113	void wl12xx_ps_link_start(struct wl1271 wl, struct wl12xx_vif wlvif,
6e8cd331 EP	114	u8 hlid, bool clean_queues)
b622d992 AN	115	{
b622d992 AN	116	struct ieee80211_sta *sta;
6e8cd331	117	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
b622d992	118
7a536265 AN	119	if (WARN_ON_ONCE(wlvif->bss_type != BSS_TYPE_AP_BSS))
	120	return;
	121
	122	if (!test_bit(hlid, wlvif->ap.sta_hlid_map) \|\|
	123	test_bit(hlid, &wl->ap_ps_map))
b622d992 AN	124	return;
b622d992 AN	125
9b17f1b3 AN	126	wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d pkts %d "
9b17f1b3 AN	127	"clean_queues %d", hlid, wl->links[hlid].allocated_pkts,
b622d992 AN	128	clean_queues);
	129
	130	rcu_read_lock();
6e8cd331	131	sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
b622d992 AN	132	if (!sta) {
	133	wl1271_error("could not find sta %pM for starting ps",
	134	wl->links[hlid].addr);
	135	rcu_read_unlock();
	136	return;
	137	}
	138
	139	ieee80211_sta_ps_transition_ni(sta, true);
	140	rcu_read_unlock();
	141
	142	/* do we want to filter all frames from this link's queues? */
	143	if (clean_queues)
	144	wl1271_ps_filter_frames(wl, hlid);
	145
	146	__set_bit(hlid, &wl->ap_ps_map);
	147	}
	148
6e8cd331	149	void wl12xx_ps_link_end(struct wl1271 wl, struct wl12xx_vif wlvif, u8 hlid)
b622d992 AN	150	{
b622d992 AN	151	struct ieee80211_sta *sta;
6e8cd331	152	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
b622d992 AN	153
	154	if (!test_bit(hlid, &wl->ap_ps_map))
	155	return;
	156
	157	wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid);
	158
	159	__clear_bit(hlid, &wl->ap_ps_map);
	160
	161	rcu_read_lock();
6e8cd331	162	sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
b622d992 AN	163	if (!sta) {
	164	wl1271_error("could not find sta %pM for ending ps",
	165	wl->links[hlid].addr);
	166	goto end;
	167	}
	168
	169	ieee80211_sta_ps_transition_ni(sta, false);
	170	end:
	171	rcu_read_unlock();
	172	}