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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2024-2025 Intel Corporation
*/
#include <net/mac80211.h>
#include "phy.h"
#include "hcmd.h"
#include "fw/api/phy-ctxt.h"
int iwl_mld_allocate_fw_phy_id(struct iwl_mld *mld)
{
int id;
unsigned long used = mld->used_phy_ids;
for_each_clear_bit(id, &used, NUM_PHY_CTX) {
mld->used_phy_ids |= BIT(id);
return id;
}
return -ENOSPC;
}
EXPORT_SYMBOL_IF_IWLWIFI_KUNIT(iwl_mld_allocate_fw_phy_id);
struct iwl_mld_chanctx_usage_data {
struct iwl_mld *mld;
struct ieee80211_chanctx_conf *ctx;
bool use_def;
};
static bool iwl_mld_chanctx_fils_enabled(struct ieee80211_vif *vif,
struct ieee80211_chanctx_conf *ctx)
{
if (vif->type != NL80211_IFTYPE_AP)
return false;
return cfg80211_channel_is_psc(ctx->def.chan) ||
(ctx->def.chan->band == NL80211_BAND_6GHZ &&
ctx->def.width >= NL80211_CHAN_WIDTH_80);
}
static void iwl_mld_chanctx_usage_iter(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mld_chanctx_usage_data *data = _data;
struct ieee80211_bss_conf *link_conf;
int link_id;
for_each_vif_active_link(vif, link_conf, link_id) {
if (rcu_access_pointer(link_conf->chanctx_conf) != data->ctx)
continue;
if (iwl_mld_chanctx_fils_enabled(vif, data->ctx))
data->use_def = true;
}
}
struct cfg80211_chan_def *
iwl_mld_get_chandef_from_chanctx(struct iwl_mld *mld,
struct ieee80211_chanctx_conf *ctx)
{
struct iwl_mld_chanctx_usage_data data = {
.mld = mld,
.ctx = ctx,
};
ieee80211_iterate_active_interfaces_mtx(mld->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mld_chanctx_usage_iter,
&data);
return data.use_def ? &ctx->def : &ctx->min_def;
}
static u8
iwl_mld_nl80211_width_to_fw(enum nl80211_chan_width width)
{
switch (width) {
case NL80211_CHAN_WIDTH_20_NOHT:
case NL80211_CHAN_WIDTH_20:
return IWL_PHY_CHANNEL_MODE20;
case NL80211_CHAN_WIDTH_40:
return IWL_PHY_CHANNEL_MODE40;
case NL80211_CHAN_WIDTH_80:
return IWL_PHY_CHANNEL_MODE80;
case NL80211_CHAN_WIDTH_160:
return IWL_PHY_CHANNEL_MODE160;
case NL80211_CHAN_WIDTH_320:
return IWL_PHY_CHANNEL_MODE320;
default:
WARN(1, "Invalid channel width=%u", width);
return IWL_PHY_CHANNEL_MODE20;
}
}
/* Maps the driver specific control channel position (relative to the center
* freq) definitions to the fw values
*/
u8 iwl_mld_get_fw_ctrl_pos(const struct cfg80211_chan_def *chandef)
{
int offs = chandef->chan->center_freq - chandef->center_freq1;
int abs_offs = abs(offs);
u8 ret;
if (offs == 0) {
/* The FW is expected to check the control channel position only
* when in HT/VHT and the channel width is not 20MHz. Return
* this value as the default one.
*/
return 0;
}
/* this results in a value 0-7, i.e. fitting into 0b0111 */
ret = (abs_offs - 10) / 20;
/* But we need the value to be in 0b1011 because 0b0100 is
* IWL_PHY_CTRL_POS_ABOVE, so shift bit 2 up to land in
* IWL_PHY_CTRL_POS_OFFS_EXT (0b1000)
*/
ret = (ret & IWL_PHY_CTRL_POS_OFFS_MSK) |
((ret & BIT(2)) << 1);
/* and add the above bit */
ret |= (offs > 0) * IWL_PHY_CTRL_POS_ABOVE;
return ret;
}
int iwl_mld_phy_fw_action(struct iwl_mld *mld,
struct ieee80211_chanctx_conf *ctx, u32 action)
{
struct iwl_mld_phy *phy = iwl_mld_phy_from_mac80211(ctx);
struct cfg80211_chan_def *chandef = &phy->chandef;
struct iwl_phy_context_cmd cmd = {
.id_and_color = cpu_to_le32(phy->fw_id),
.action = cpu_to_le32(action),
.puncture_mask = cpu_to_le16(chandef->punctured),
/* Channel info */
.ci.channel = cpu_to_le32(chandef->chan->hw_value),
.ci.band = iwl_mld_nl80211_band_to_fw(chandef->chan->band),
.ci.width = iwl_mld_nl80211_width_to_fw(chandef->width),
.ci.ctrl_pos = iwl_mld_get_fw_ctrl_pos(chandef),
};
int ret;
if (ctx->ap.chan) {
cmd.sbb_bandwidth =
iwl_mld_nl80211_width_to_fw(ctx->ap.width);
cmd.sbb_ctrl_channel_loc = iwl_mld_get_fw_ctrl_pos(&ctx->ap);
}
ret = iwl_mld_send_cmd_pdu(mld, PHY_CONTEXT_CMD, &cmd);
if (ret)
IWL_ERR(mld, "Failed to send PHY_CONTEXT_CMD ret = %d\n", ret);
return ret;
}
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