1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2024-2025 Intel Corporation
4 */
5 #include <net/mac80211.h>
6
7 #include "phy.h"
8 #include "hcmd.h"
9 #include "fw/api/phy-ctxt.h"
10
iwl_mld_allocate_fw_phy_id(struct iwl_mld * mld)11 int iwl_mld_allocate_fw_phy_id(struct iwl_mld *mld)
12 {
13 int id;
14 unsigned long used = mld->used_phy_ids;
15
16 for_each_clear_bit(id, &used, NUM_PHY_CTX) {
17 mld->used_phy_ids |= BIT(id);
18 return id;
19 }
20
21 return -ENOSPC;
22 }
23 EXPORT_SYMBOL_IF_IWLWIFI_KUNIT(iwl_mld_allocate_fw_phy_id);
24
25 struct iwl_mld_chanctx_usage_data {
26 struct iwl_mld *mld;
27 struct ieee80211_chanctx_conf *ctx;
28 bool use_def;
29 };
30
iwl_mld_chanctx_fils_enabled(struct ieee80211_vif * vif,struct ieee80211_chanctx_conf * ctx)31 static bool iwl_mld_chanctx_fils_enabled(struct ieee80211_vif *vif,
32 struct ieee80211_chanctx_conf *ctx)
33 {
34 if (vif->type != NL80211_IFTYPE_AP)
35 return false;
36
37 return cfg80211_channel_is_psc(ctx->def.chan) ||
38 (ctx->def.chan->band == NL80211_BAND_6GHZ &&
39 ctx->def.width >= NL80211_CHAN_WIDTH_80);
40 }
41
iwl_mld_chanctx_usage_iter(void * _data,u8 * mac,struct ieee80211_vif * vif)42 static void iwl_mld_chanctx_usage_iter(void *_data, u8 *mac,
43 struct ieee80211_vif *vif)
44 {
45 struct iwl_mld_chanctx_usage_data *data = _data;
46 struct ieee80211_bss_conf *link_conf;
47 int link_id;
48
49 for_each_vif_active_link(vif, link_conf, link_id) {
50 if (rcu_access_pointer(link_conf->chanctx_conf) != data->ctx)
51 continue;
52
53 if (vif->type == NL80211_IFTYPE_AP && link_conf->ftm_responder)
54 data->use_def = true;
55
56 if (iwl_mld_chanctx_fils_enabled(vif, data->ctx))
57 data->use_def = true;
58 }
59 }
60
61 struct cfg80211_chan_def *
iwl_mld_get_chandef_from_chanctx(struct iwl_mld * mld,struct ieee80211_chanctx_conf * ctx)62 iwl_mld_get_chandef_from_chanctx(struct iwl_mld *mld,
63 struct ieee80211_chanctx_conf *ctx)
64 {
65 struct iwl_mld_chanctx_usage_data data = {
66 .mld = mld,
67 .ctx = ctx,
68 };
69
70 ieee80211_iterate_active_interfaces_mtx(mld->hw,
71 IEEE80211_IFACE_ITER_NORMAL,
72 iwl_mld_chanctx_usage_iter,
73 &data);
74
75 return data.use_def ? &ctx->def : &ctx->min_def;
76 }
77
78 static u8
iwl_mld_nl80211_width_to_fw(enum nl80211_chan_width width)79 iwl_mld_nl80211_width_to_fw(enum nl80211_chan_width width)
80 {
81 switch (width) {
82 case NL80211_CHAN_WIDTH_20_NOHT:
83 case NL80211_CHAN_WIDTH_20:
84 return IWL_PHY_CHANNEL_MODE20;
85 case NL80211_CHAN_WIDTH_40:
86 return IWL_PHY_CHANNEL_MODE40;
87 case NL80211_CHAN_WIDTH_80:
88 return IWL_PHY_CHANNEL_MODE80;
89 case NL80211_CHAN_WIDTH_160:
90 return IWL_PHY_CHANNEL_MODE160;
91 case NL80211_CHAN_WIDTH_320:
92 return IWL_PHY_CHANNEL_MODE320;
93 default:
94 WARN(1, "Invalid channel width=%u", width);
95 return IWL_PHY_CHANNEL_MODE20;
96 }
97 }
98
99 /* Maps the driver specific control channel position (relative to the center
100 * freq) definitions to the fw values
101 */
iwl_mld_get_fw_ctrl_pos(const struct cfg80211_chan_def * chandef)102 u8 iwl_mld_get_fw_ctrl_pos(const struct cfg80211_chan_def *chandef)
103 {
104 int offs = chandef->chan->center_freq - chandef->center_freq1;
105 int abs_offs = abs(offs);
106 u8 ret;
107
108 if (offs == 0) {
109 /* The FW is expected to check the control channel position only
110 * when in HT/VHT and the channel width is not 20MHz. Return
111 * this value as the default one.
112 */
113 return 0;
114 }
115
116 /* this results in a value 0-7, i.e. fitting into 0b0111 */
117 ret = (abs_offs - 10) / 20;
118 /* But we need the value to be in 0b1011 because 0b0100 is
119 * IWL_PHY_CTRL_POS_ABOVE, so shift bit 2 up to land in
120 * IWL_PHY_CTRL_POS_OFFS_EXT (0b1000)
121 */
122 ret = (ret & IWL_PHY_CTRL_POS_OFFS_MSK) |
123 ((ret & BIT(2)) << 1);
124 /* and add the above bit */
125 ret |= (offs > 0) * IWL_PHY_CTRL_POS_ABOVE;
126
127 return ret;
128 }
129
iwl_mld_phy_fw_action(struct iwl_mld * mld,struct ieee80211_chanctx_conf * ctx,u32 action)130 int iwl_mld_phy_fw_action(struct iwl_mld *mld,
131 struct ieee80211_chanctx_conf *ctx, u32 action)
132 {
133 struct iwl_mld_phy *phy = iwl_mld_phy_from_mac80211(ctx);
134 struct cfg80211_chan_def *chandef = &phy->chandef;
135 struct iwl_phy_context_cmd cmd = {
136 .id_and_color = cpu_to_le32(phy->fw_id),
137 .action = cpu_to_le32(action),
138 .puncture_mask = cpu_to_le16(chandef->punctured),
139 /* Channel info */
140 .ci.channel = cpu_to_le32(chandef->chan->hw_value),
141 .ci.band = iwl_mld_nl80211_band_to_fw(chandef->chan->band),
142 .ci.width = iwl_mld_nl80211_width_to_fw(chandef->width),
143 .ci.ctrl_pos = iwl_mld_get_fw_ctrl_pos(chandef),
144 };
145 int ret;
146
147 if (ctx->ap.chan) {
148 cmd.sbb_bandwidth =
149 iwl_mld_nl80211_width_to_fw(ctx->ap.width);
150 cmd.sbb_ctrl_channel_loc = iwl_mld_get_fw_ctrl_pos(&ctx->ap);
151 }
152
153 ret = iwl_mld_send_cmd_pdu(mld, PHY_CONTEXT_CMD, &cmd);
154 if (ret)
155 IWL_ERR(mld, "Failed to send PHY_CONTEXT_CMD ret = %d\n", ret);
156
157 return ret;
158 }
159
iwl_mld_get_phy_config(struct iwl_mld * mld)160 static u32 iwl_mld_get_phy_config(struct iwl_mld *mld)
161 {
162 u32 phy_config = ~(FW_PHY_CFG_TX_CHAIN |
163 FW_PHY_CFG_RX_CHAIN);
164 u32 valid_rx_ant = iwl_mld_get_valid_rx_ant(mld);
165 u32 valid_tx_ant = iwl_mld_get_valid_tx_ant(mld);
166
167 phy_config |= valid_tx_ant << FW_PHY_CFG_TX_CHAIN_POS |
168 valid_rx_ant << FW_PHY_CFG_RX_CHAIN_POS;
169
170 return mld->fw->phy_config & phy_config;
171 }
172
iwl_mld_send_phy_cfg_cmd(struct iwl_mld * mld)173 int iwl_mld_send_phy_cfg_cmd(struct iwl_mld *mld)
174 {
175 const struct iwl_tlv_calib_ctrl *default_calib =
176 &mld->fw->default_calib[IWL_UCODE_REGULAR];
177 struct iwl_phy_cfg_cmd_v3 cmd = {
178 .phy_cfg = cpu_to_le32(iwl_mld_get_phy_config(mld)),
179 .calib_control.event_trigger = default_calib->event_trigger,
180 .calib_control.flow_trigger = default_calib->flow_trigger,
181 .phy_specific_cfg = mld->fwrt.phy_filters,
182 };
183
184 IWL_DEBUG_INFO(mld, "Sending Phy CFG command: 0x%x\n", cmd.phy_cfg);
185
186 return iwl_mld_send_cmd_pdu(mld, PHY_CONFIGURATION_CMD, &cmd);
187 }
188
iwl_mld_update_phy_chandef(struct iwl_mld * mld,struct ieee80211_chanctx_conf * ctx)189 void iwl_mld_update_phy_chandef(struct iwl_mld *mld,
190 struct ieee80211_chanctx_conf *ctx)
191 {
192 struct iwl_mld_phy *phy = iwl_mld_phy_from_mac80211(ctx);
193 struct cfg80211_chan_def *chandef =
194 iwl_mld_get_chandef_from_chanctx(mld, ctx);
195
196 phy->chandef = *chandef;
197 iwl_mld_phy_fw_action(mld, ctx, FW_CTXT_ACTION_MODIFY);
198 }
199