1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
2 /*
3 * Copyright (C) 2024-2025 Intel Corporation
4 */
5 #ifndef __iwl_mld_iface_h__
6 #define __iwl_mld_iface_h__
7
8 #include <net/mac80211.h>
9
10 #include "link.h"
11 #include "session-protect.h"
12 #include "d3.h"
13
14 enum iwl_mld_cca_40mhz_wa_status {
15 CCA_40_MHZ_WA_NONE,
16 CCA_40_MHZ_WA_RESET,
17 CCA_40_MHZ_WA_RECONNECT,
18 };
19
20 /**
21 * enum iwl_mld_emlsr_blocked - defines reasons for which EMLSR is blocked
22 *
23 * These blocks are applied/stored per-VIF.
24 *
25 * @IWL_MLD_EMLSR_BLOCKED_PREVENTION: Prevent repeated EMLSR enter/exit
26 * @IWL_MLD_EMLSR_BLOCKED_WOWLAN: WOWLAN is preventing EMLSR
27 * @IWL_MLD_EMLSR_BLOCKED_ROC: remain-on-channel is preventing EMLSR
28 * @IWL_MLD_EMLSR_BLOCKED_NON_BSS: An active non-BSS interface's link is
29 * preventing EMLSR
30 * @IWL_MLD_EMLSR_BLOCKED_TMP_NON_BSS: An expected active non-BSS interface's
31 * link is preventing EMLSR. This is a temporary blocking that is set when
32 * there is an indication that a non-BSS interface is to be added.
33 * @IWL_MLD_EMLSR_BLOCKED_TPT: throughput is too low to make EMLSR worthwhile
34 */
35 enum iwl_mld_emlsr_blocked {
36 IWL_MLD_EMLSR_BLOCKED_PREVENTION = 0x1,
37 IWL_MLD_EMLSR_BLOCKED_WOWLAN = 0x2,
38 IWL_MLD_EMLSR_BLOCKED_ROC = 0x4,
39 IWL_MLD_EMLSR_BLOCKED_NON_BSS = 0x8,
40 IWL_MLD_EMLSR_BLOCKED_TMP_NON_BSS = 0x10,
41 IWL_MLD_EMLSR_BLOCKED_TPT = 0x20,
42 };
43
44 /**
45 * enum iwl_mld_emlsr_exit - defines reasons for exiting EMLSR
46 *
47 * Reasons to exit EMLSR may be either link specific or even specific to a
48 * combination of links.
49 *
50 * @IWL_MLD_EMLSR_EXIT_BLOCK: Exit due to a block reason being set
51 * @IWL_MLD_EMLSR_EXIT_MISSED_BEACON: Exit due to missed beacons
52 * @IWL_MLD_EMLSR_EXIT_FAIL_ENTRY: FW failed to enter EMLSR
53 * @IWL_MLD_EMLSR_EXIT_CSA: EMLSR prevented due to channel switch on link
54 * @IWL_MLD_EMLSR_EXIT_EQUAL_BAND: EMLSR prevented as both links share the band
55 * @IWL_MLD_EMLSR_EXIT_LOW_RSSI: Link RSSI is unsuitable for EMLSR
56 * @IWL_MLD_EMLSR_EXIT_LINK_USAGE: Exit EMLSR due to low TPT on secondary link
57 * @IWL_MLD_EMLSR_EXIT_BT_COEX: Exit EMLSR due to BT coexistence
58 * @IWL_MLD_EMLSR_EXIT_CHAN_LOAD: Exit EMLSR because the primary channel is not
59 * loaded enough to justify EMLSR.
60 * @IWL_MLD_EMLSR_EXIT_RFI: Exit EMLSR due to RFI
61 * @IWL_MLD_EMLSR_EXIT_FW_REQUEST: Exit EMLSR because the FW requested it
62 */
63 enum iwl_mld_emlsr_exit {
64 IWL_MLD_EMLSR_EXIT_BLOCK = 0x1,
65 IWL_MLD_EMLSR_EXIT_MISSED_BEACON = 0x2,
66 IWL_MLD_EMLSR_EXIT_FAIL_ENTRY = 0x4,
67 IWL_MLD_EMLSR_EXIT_CSA = 0x8,
68 IWL_MLD_EMLSR_EXIT_EQUAL_BAND = 0x10,
69 IWL_MLD_EMLSR_EXIT_LOW_RSSI = 0x20,
70 IWL_MLD_EMLSR_EXIT_LINK_USAGE = 0x40,
71 IWL_MLD_EMLSR_EXIT_BT_COEX = 0x80,
72 IWL_MLD_EMLSR_EXIT_CHAN_LOAD = 0x100,
73 IWL_MLD_EMLSR_EXIT_RFI = 0x200,
74 IWL_MLD_EMLSR_EXIT_FW_REQUEST = 0x400,
75 };
76
77 /**
78 * struct iwl_mld_emlsr - per-VIF data about EMLSR operation
79 *
80 * @primary: The current primary link
81 * @selected_primary: Primary link as selected during the last link selection
82 * @selected_links: Links as selected during the last link selection
83 * @blocked_reasons: Reasons preventing EMLSR from being enabled
84 * @last_exit_reason: Reason for the last EMLSR exit
85 * @last_exit_ts: Time of the last EMLSR exit (if @last_exit_reason is non-zero)
86 * @exit_repeat_count: Number of times EMLSR was exited for the same reason
87 * @unblock_tpt_wk: Unblock EMLSR because the throughput limit was reached
88 * @check_tpt_wk: a worker to check if IWL_MLD_EMLSR_BLOCKED_TPT should be
89 * added, for example if there is no longer enough traffic.
90 * @prevent_done_wk: Worker to remove %IWL_MLD_EMLSR_BLOCKED_PREVENTION
91 * @tmp_non_bss_done_wk: Worker to remove %IWL_MLD_EMLSR_BLOCKED_TMP_NON_BSS
92 */
93 struct iwl_mld_emlsr {
94 struct_group(zeroed_on_not_authorized,
95 u8 primary;
96
97 u8 selected_primary;
98 u16 selected_links;
99
100 enum iwl_mld_emlsr_blocked blocked_reasons;
101
102 enum iwl_mld_emlsr_exit last_exit_reason;
103 unsigned long last_exit_ts;
104 u8 exit_repeat_count;
105 );
106
107 struct wiphy_work unblock_tpt_wk;
108 struct wiphy_delayed_work check_tpt_wk;
109
110 struct wiphy_delayed_work prevent_done_wk;
111 struct wiphy_delayed_work tmp_non_bss_done_wk;
112 };
113
114 /**
115 * struct iwl_mld_vif - virtual interface (MAC context) configuration parameters
116 *
117 * @fw_id: fw id of the mac context.
118 * @session_protect: session protection parameters
119 * @ap_sta: pointer to AP sta, for easier access to it.
120 * Relevant only for STA vifs.
121 * @authorized: indicates the AP station was set to authorized
122 * @bigtks: BIGTKs of the AP, for beacon protection.
123 * Only valid for STA. (FIXME: needs to be per link)
124 * @num_associated_stas: number of associated STAs. Relevant only for AP mode.
125 * @ap_ibss_active: whether the AP/IBSS was started
126 * @roc_activity: the id of the roc_activity running. Relevant for p2p device
127 * only. Set to %ROC_NUM_ACTIVITIES when not in use.
128 * @cca_40mhz_workaround: When we are connected in 2.4 GHz and 40 MHz, and the
129 * environment is too loaded, we work around this by reconnecting to the
130 * same AP with 20 MHz. This manages the status of the workaround.
131 * @beacon_inject_active: indicates an active debugfs beacon ie injection
132 * @low_latency_causes: bit flags, indicating the causes for low-latency,
133 * see @iwl_mld_low_latency_cause.
134 * @ps_disabled: indicates that PS is disabled for this interface
135 * @mld: pointer to the mld structure.
136 * @deflink: default link data, for use in non-MLO,
137 * @link: reference to link data for each valid link, for use in MLO.
138 * @emlsr: information related to EMLSR
139 * @wowlan_data: data used by the wowlan suspend flow
140 * @use_ps_poll: use ps_poll frames
141 * @disable_bf: disable beacon filter
142 * @dbgfs_slink: debugfs symlink for this interface
143 */
144 struct iwl_mld_vif {
145 /* Add here fields that need clean up on restart */
146 struct_group(zeroed_on_hw_restart,
147 u8 fw_id;
148 struct iwl_mld_session_protect session_protect;
149 struct ieee80211_sta *ap_sta;
150 bool authorized;
151 struct ieee80211_key_conf __rcu *bigtks[2];
152 u8 num_associated_stas;
153 bool ap_ibss_active;
154 u32 roc_activity;
155 enum iwl_mld_cca_40mhz_wa_status cca_40mhz_workaround;
156 #ifdef CONFIG_IWLWIFI_DEBUGFS
157 bool beacon_inject_active;
158 #endif
159 u8 low_latency_causes;
160 bool ps_disabled;
161 );
162 /* And here fields that survive a fw restart */
163 struct iwl_mld *mld;
164 struct iwl_mld_link deflink;
165 struct iwl_mld_link __rcu *link[IEEE80211_MLD_MAX_NUM_LINKS];
166
167 struct iwl_mld_emlsr emlsr;
168
169 #ifdef CONFIG_PM_SLEEP
170 struct iwl_mld_wowlan_data wowlan_data;
171 #endif
172 #ifdef CONFIG_IWLWIFI_DEBUGFS
173 bool use_ps_poll;
174 bool disable_bf;
175 struct dentry *dbgfs_slink;
176 #endif
177 };
178
179 static inline struct iwl_mld_vif *
iwl_mld_vif_from_mac80211(struct ieee80211_vif * vif)180 iwl_mld_vif_from_mac80211(struct ieee80211_vif *vif)
181 {
182 return (void *)vif->drv_priv;
183 }
184
185 #define iwl_mld_link_dereference_check(mld_vif, link_id) \
186 rcu_dereference_check((mld_vif)->link[link_id], \
187 lockdep_is_held(&mld_vif->mld->wiphy->mtx))
188
189 #define for_each_mld_vif_valid_link(mld_vif, mld_link) \
190 for (int link_id = 0; link_id < ARRAY_SIZE((mld_vif)->link); \
191 link_id++) \
192 if ((mld_link = iwl_mld_link_dereference_check(mld_vif, link_id)))
193
194 /* Retrieve pointer to mld link from mac80211 structures */
195 static inline struct iwl_mld_link *
iwl_mld_link_from_mac80211(struct ieee80211_bss_conf * bss_conf)196 iwl_mld_link_from_mac80211(struct ieee80211_bss_conf *bss_conf)
197 {
198 struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(bss_conf->vif);
199
200 return iwl_mld_link_dereference_check(mld_vif, bss_conf->link_id);
201 }
202
203 int iwl_mld_mac80211_iftype_to_fw(const struct ieee80211_vif *vif);
204
205 /* Cleanup function for struct iwl_mld_vif, will be called in restart */
206 void iwl_mld_cleanup_vif(void *data, u8 *mac, struct ieee80211_vif *vif);
207 int iwl_mld_mac_fw_action(struct iwl_mld *mld, struct ieee80211_vif *vif,
208 u32 action);
209 int iwl_mld_add_vif(struct iwl_mld *mld, struct ieee80211_vif *vif);
210 int iwl_mld_rm_vif(struct iwl_mld *mld, struct ieee80211_vif *vif);
211 void iwl_mld_set_vif_associated(struct iwl_mld *mld,
212 struct ieee80211_vif *vif);
213 u8 iwl_mld_get_fw_bss_vifs_ids(struct iwl_mld *mld);
214 void iwl_mld_handle_probe_resp_data_notif(struct iwl_mld *mld,
215 struct iwl_rx_packet *pkt);
216
217 void iwl_mld_handle_datapath_monitor_notif(struct iwl_mld *mld,
218 struct iwl_rx_packet *pkt);
219
220 void iwl_mld_handle_uapsd_misbehaving_ap_notif(struct iwl_mld *mld,
221 struct iwl_rx_packet *pkt);
222
223 void iwl_mld_reset_cca_40mhz_workaround(struct iwl_mld *mld,
224 struct ieee80211_vif *vif);
225
iwl_mld_vif_low_latency(const struct iwl_mld_vif * mld_vif)226 static inline bool iwl_mld_vif_low_latency(const struct iwl_mld_vif *mld_vif)
227 {
228 return !!mld_vif->low_latency_causes;
229 }
230
231 struct ieee80211_vif *iwl_mld_get_bss_vif(struct iwl_mld *mld);
232
233 #endif /* __iwl_mld_iface_h__ */
234