// SPDX-License-Identifier: GPL-2.0-only
/*
* mac80211 - channel management
+ * Copyright 2020 - 2021 Intel Corporation
*/
#include <linux/nl80211.h>
* the max of min required widths of all the interfaces bound to this
* channel context.
*/
-void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
- struct ieee80211_chanctx *ctx)
+static u32 _ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
+ struct ieee80211_chanctx *ctx)
{
enum nl80211_chan_width max_bw;
struct cfg80211_chan_def min_def;
ctx->conf.def.width == NL80211_CHAN_WIDTH_16 ||
ctx->conf.radar_enabled) {
ctx->conf.min_def = ctx->conf.def;
- return;
+ return 0;
}
max_bw = ieee80211_get_chanctx_max_required_bw(local, &ctx->conf);
ieee80211_chandef_downgrade(&min_def);
if (cfg80211_chandef_identical(&ctx->conf.min_def, &min_def))
- return;
+ return 0;
ctx->conf.min_def = min_def;
if (!ctx->driver_present)
- return;
+ return 0;
- drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_MIN_WIDTH);
+ return IEEE80211_CHANCTX_CHANGE_MIN_WIDTH;
}
+/* calling this function is assuming that station vif is updated to
+ * lates changes by calling ieee80211_vif_update_chandef
+ */
static void ieee80211_chan_bw_change(struct ieee80211_local *local,
- struct ieee80211_chanctx *ctx)
+ struct ieee80211_chanctx *ctx,
+ bool narrowed)
{
struct sta_info *sta;
struct ieee80211_supported_band *sband =
continue;
new_sta_bw = ieee80211_sta_cur_vht_bw(sta);
+
+ /* nothing change */
if (new_sta_bw == sta->sta.bandwidth)
continue;
+ /* vif changed to narrow BW and narrow BW for station wasn't
+ * requested or vise versa */
+ if ((new_sta_bw < sta->sta.bandwidth) == !narrowed)
+ continue;
+
sta->sta.bandwidth = new_sta_bw;
rate_control_rate_update(local, sband, sta,
IEEE80211_RC_BW_CHANGED);
rcu_read_unlock();
}
-static void ieee80211_change_chanctx(struct ieee80211_local *local,
- struct ieee80211_chanctx *ctx,
- const struct cfg80211_chan_def *chandef)
+/*
+ * recalc the min required chan width of the channel context, which is
+ * the max of min required widths of all the interfaces bound to this
+ * channel context.
+ */
+void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
+ struct ieee80211_chanctx *ctx)
{
- enum nl80211_chan_width width;
+ u32 changed = _ieee80211_recalc_chanctx_min_def(local, ctx);
- if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) {
- ieee80211_recalc_chanctx_min_def(local, ctx);
+ if (!changed)
return;
- }
- WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef));
+ /* check is BW narrowed */
+ ieee80211_chan_bw_change(local, ctx, true);
- width = ctx->conf.def.width;
- ctx->conf.def = *chandef;
+ drv_change_chanctx(local, ctx, changed);
+
+ /* check is BW wider */
+ ieee80211_chan_bw_change(local, ctx, false);
+}
+
+static void ieee80211_change_chanctx(struct ieee80211_local *local,
+ struct ieee80211_chanctx *ctx,
+ struct ieee80211_chanctx *old_ctx,
+ const struct cfg80211_chan_def *chandef)
+{
+ u32 changed;
/* expected to handle only 20/40/80/160 channel widths */
switch (chandef->width) {
WARN_ON(1);
}
- if (chandef->width < width)
- ieee80211_chan_bw_change(local, ctx);
+ /* Check maybe BW narrowed - we do this _before_ calling recalc_chanctx_min_def
+ * due to maybe not returning from it, e.g in case new context was added
+ * first time with all parameters up to date.
+ */
+ ieee80211_chan_bw_change(local, old_ctx, true);
+
+ if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) {
+ ieee80211_recalc_chanctx_min_def(local, ctx);
+ return;
+ }
- drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_WIDTH);
- ieee80211_recalc_chanctx_min_def(local, ctx);
+ WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef));
+
+ ctx->conf.def = *chandef;
+
+ /* check if min chanctx also changed */
+ changed = IEEE80211_CHANCTX_CHANGE_WIDTH |
+ _ieee80211_recalc_chanctx_min_def(local, ctx);
+ drv_change_chanctx(local, ctx, changed);
if (!local->use_chanctx) {
local->_oper_chandef = *chandef;
ieee80211_hw_config(local, 0);
}
- if (chandef->width > width)
- ieee80211_chan_bw_change(local, ctx);
+ /* check is BW wider */
+ ieee80211_chan_bw_change(local, old_ctx, false);
}
static struct ieee80211_chanctx *
if (!compat)
continue;
- ieee80211_change_chanctx(local, ctx, compat);
+ ieee80211_change_chanctx(local, ctx, ctx, compat);
return ctx;
}
if (!compat)
return;
- ieee80211_change_chanctx(local, ctx, compat);
+ ieee80211_change_chanctx(local, ctx, ctx, compat);
}
static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local,
if (WARN_ON(!chandef))
return -EINVAL;
- if (old_ctx->conf.def.width > new_ctx->conf.def.width)
- ieee80211_chan_bw_change(local, new_ctx);
+ if (sdata->vif.bss_conf.chandef.width != sdata->reserved_chandef.width)
+ changed = BSS_CHANGED_BANDWIDTH;
- ieee80211_change_chanctx(local, new_ctx, chandef);
+ ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef);
- if (old_ctx->conf.def.width < new_ctx->conf.def.width)
- ieee80211_chan_bw_change(local, new_ctx);
+ ieee80211_change_chanctx(local, new_ctx, old_ctx, chandef);
vif_chsw[0].vif = &sdata->vif;
vif_chsw[0].old_ctx = &old_ctx->conf;
if (ieee80211_chanctx_refcount(local, old_ctx) == 0)
ieee80211_free_chanctx(local, old_ctx);
- if (sdata->vif.bss_conf.chandef.width != sdata->reserved_chandef.width)
- changed = BSS_CHANGED_BANDWIDTH;
-
- ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef);
-
+ ieee80211_recalc_chanctx_min_def(local, new_ctx);
ieee80211_recalc_smps_chanctx(local, new_ctx);
ieee80211_recalc_radar_chanctx(local, new_ctx);
- ieee80211_recalc_chanctx_min_def(local, new_ctx);
if (changed)
ieee80211_bss_info_change_notify(sdata, changed);
if (WARN_ON(!chandef))
return -EINVAL;
- ieee80211_change_chanctx(local, new_ctx, chandef);
+ ieee80211_change_chanctx(local, new_ctx, new_ctx, chandef);
list_del(&sdata->reserved_chanctx_list);
sdata->reserved_chanctx = NULL;
ieee80211_recalc_smps_chanctx(local, ctx);
ieee80211_recalc_radar_chanctx(local, ctx);
ieee80211_recalc_chanctx_min_def(local, ctx);
- ieee80211_chan_bw_change(local, ctx);
list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs,
reserved_chanctx_list) {
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