1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2013-2014, 2018-2019, 2022-2024 Intel Corporation
4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5 */
6#include "mvm.h"
7
8/* For counting bound interfaces */
9struct iwl_mvm_active_iface_iterator_data {
10	struct ieee80211_vif *ignore_vif;
11	struct ieee80211_sta *sta_vif_ap_sta;
12	enum iwl_sf_state sta_vif_state;
13	u32 num_active_macs;
14};
15
16/*
17 * Count bound interfaces which are not p2p, besides data->ignore_vif.
18 * data->station_vif will point to one bound vif of type station, if exists.
19 */
20static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac,
21					 struct ieee80211_vif *vif)
22{
23	struct iwl_mvm_active_iface_iterator_data *data = _data;
24	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
25
26	if (vif == data->ignore_vif || !mvmvif->deflink.phy_ctxt ||
27	    vif->type == NL80211_IFTYPE_P2P_DEVICE)
28		return;
29
30	data->num_active_macs++;
31
32	if (vif->type == NL80211_IFTYPE_STATION) {
33		data->sta_vif_ap_sta = mvmvif->ap_sta;
34		if (vif->cfg.assoc)
35			data->sta_vif_state = SF_FULL_ON;
36		else
37			data->sta_vif_state = SF_INIT_OFF;
38	}
39}
40
41/*
42 * Aging and idle timeouts for the different possible scenarios
43 * in default configuration
44 */
45static const
46__le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
47	{
48		cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF),
49		cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF)
50	},
51	{
52		cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF),
53		cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF)
54	},
55	{
56		cpu_to_le32(SF_MCAST_AGING_TIMER_DEF),
57		cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF)
58	},
59	{
60		cpu_to_le32(SF_BA_AGING_TIMER_DEF),
61		cpu_to_le32(SF_BA_IDLE_TIMER_DEF)
62	},
63	{
64		cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF),
65		cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF)
66	},
67};
68
69/*
70 * Aging and idle timeouts for the different possible scenarios
71 * in single BSS MAC configuration.
72 */
73static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
74	{
75		cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER),
76		cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER)
77	},
78	{
79		cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER),
80		cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER)
81	},
82	{
83		cpu_to_le32(SF_MCAST_AGING_TIMER),
84		cpu_to_le32(SF_MCAST_IDLE_TIMER)
85	},
86	{
87		cpu_to_le32(SF_BA_AGING_TIMER),
88		cpu_to_le32(SF_BA_IDLE_TIMER)
89	},
90	{
91		cpu_to_le32(SF_TX_RE_AGING_TIMER),
92		cpu_to_le32(SF_TX_RE_IDLE_TIMER)
93	},
94};
95
96static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm,
97				    struct iwl_sf_cfg_cmd *sf_cmd,
98				    struct ieee80211_sta *sta)
99{
100	int i, j, watermark;
101	u8 max_rx_nss = 0;
102	bool is_legacy = true;
103	struct ieee80211_link_sta *link_sta;
104	unsigned int link_id;
105
106	sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);
107
108	/*
109	 * If we are in association flow - check antenna configuration
110	 * capabilities of the AP station, and choose the watermark accordingly.
111	 */
112	if (sta) {
113		/* find the maximal NSS number among all links (if relevant) */
114		rcu_read_lock();
115		for (link_id = 0; link_id < ARRAY_SIZE(sta->link); link_id++) {
116			link_sta = rcu_dereference(sta->link[link_id]);
117			if (!link_sta)
118				continue;
119
120			if (link_sta->ht_cap.ht_supported ||
121			    link_sta->vht_cap.vht_supported ||
122			    link_sta->eht_cap.has_eht ||
123			    link_sta->he_cap.has_he) {
124				is_legacy = false;
125				max_rx_nss = max(max_rx_nss, link_sta->rx_nss);
126			}
127		}
128		rcu_read_unlock();
129
130		if (!is_legacy) {
131			switch (max_rx_nss) {
132			case 1:
133				watermark = SF_W_MARK_SISO;
134				break;
135			case 2:
136				watermark = SF_W_MARK_MIMO2;
137				break;
138			default:
139				watermark = SF_W_MARK_MIMO3;
140				break;
141			}
142		} else {
143			watermark = SF_W_MARK_LEGACY;
144		}
145	/* default watermark value for unassociated mode. */
146	} else {
147		watermark = SF_W_MARK_MIMO2;
148	}
149	sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
150
151	for (i = 0; i < SF_NUM_SCENARIO; i++) {
152		for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
153			sf_cmd->long_delay_timeouts[i][j] =
154					cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
155		}
156	}
157
158	if (sta) {
159		BUILD_BUG_ON(sizeof(sf_full_timeout) !=
160			     sizeof(__le32) * SF_NUM_SCENARIO *
161			     SF_NUM_TIMEOUT_TYPES);
162
163		memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
164		       sizeof(sf_full_timeout));
165	} else {
166		BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
167			     sizeof(__le32) * SF_NUM_SCENARIO *
168			     SF_NUM_TIMEOUT_TYPES);
169
170		memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
171		       sizeof(sf_full_timeout_def));
172	}
173}
174
175static int iwl_mvm_sf_config(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
176			     enum iwl_sf_state new_state)
177{
178	struct iwl_sf_cfg_cmd sf_cmd = {
179		.state = cpu_to_le32(new_state),
180	};
181	int ret = 0;
182
183	/*
184	 * If an associated AP sta changed its antenna configuration, the state
185	 * will remain FULL_ON but SF parameters need to be reconsidered.
186	 */
187	if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
188		return 0;
189
190	switch (new_state) {
191	case SF_UNINIT:
192		iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
193		break;
194	case SF_FULL_ON:
195		if (!sta) {
196			IWL_ERR(mvm,
197				"No station: Cannot switch SF to FULL_ON\n");
198			return -EINVAL;
199		}
200		iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
201		break;
202	case SF_INIT_OFF:
203		iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
204		break;
205	default:
206		WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
207			  new_state);
208		return -EINVAL;
209	}
210
211	ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
212				   sizeof(sf_cmd), &sf_cmd);
213	if (!ret)
214		mvm->sf_state = new_state;
215
216	return ret;
217}
218
219/*
220 * Update Smart fifo:
221 * Count bound interfaces that are not to be removed, ignoring p2p devices,
222 * and set new state accordingly.
223 */
224int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
225		      bool remove_vif)
226{
227	enum iwl_sf_state new_state;
228	struct iwl_mvm_vif *mvmvif = NULL;
229	struct iwl_mvm_active_iface_iterator_data data = {
230		.ignore_vif = changed_vif,
231		.sta_vif_state = SF_UNINIT,
232	};
233	struct ieee80211_sta *sta = NULL;
234
235	if (fw_has_api(&mvm->fw->ucode_capa,
236		       IWL_UCODE_TLV_API_SMART_FIFO_OFFLOAD))
237		return 0;
238	/*
239	 * Ignore the call if we are in HW Restart flow, or if the handled
240	 * vif is a p2p device.
241	 */
242	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
243	    (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
244		return 0;
245
246	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
247						   IEEE80211_IFACE_ITER_NORMAL,
248						   iwl_mvm_bound_iface_iterator,
249						   &data);
250
251	/* If changed_vif exists and is not to be removed, add to the count */
252	if (changed_vif && !remove_vif)
253		data.num_active_macs++;
254
255	switch (data.num_active_macs) {
256	case 0:
257		/* If there are no active macs - change state to SF_INIT_OFF */
258		new_state = SF_INIT_OFF;
259		break;
260	case 1:
261		if (remove_vif) {
262			/* The one active mac left is of type station
263			 * and we filled the relevant data during iteration
264			 */
265			new_state = data.sta_vif_state;
266			sta = data.sta_vif_ap_sta;
267		} else {
268			if (WARN_ON(!changed_vif))
269				return -EINVAL;
270			if (changed_vif->type != NL80211_IFTYPE_STATION) {
271				new_state = SF_UNINIT;
272			} else if (changed_vif->cfg.assoc &&
273				   changed_vif->bss_conf.dtim_period) {
274				mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
275				sta = mvmvif->ap_sta;
276				new_state = SF_FULL_ON;
277			} else {
278				new_state = SF_INIT_OFF;
279			}
280		}
281		break;
282	default:
283		/* If there are multiple active macs - change to SF_UNINIT */
284		new_state = SF_UNINIT;
285	}
286
287	return iwl_mvm_sf_config(mvm, sta, new_state);
288}
289