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mac80211: add min required channel definition field

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Add a new field to ieee80211_chanctx_conf to indicate
the min required channel configuration.

Tuning to a narrower channel might help reducing
the noise level and saving some power.

The min required channel definition is the max of
all min required channel definitions of the interfaces
bound to this channel context.

In AP mode, use 20MHz when there are no connected station.
When a new station is added/removed, calculate the new max
bandwidth supported by any of the stations (e.g. 80MHz when
80MHz and 40MHz stations are connected).

In other cases, simply use bss_conf.chandef as the
min required chandef.

Notify drivers about changes to this field by calling
drv_change_chanctx with a new CHANGE_MIN_WIDTH notification.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Eliad Peller
2013-11-11 20:14:01 +02:00
committed by Johannes Berg
parent fbdd90ea83
commit 21f659bf1f
6 changed files with 187 additions and 2 deletions
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21
net/mac80211/trace.h
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@@ -41,14 +41,31 @@
#define CHANDEF_PR_ARG __entry->control_freq, __entry->chan_width, \
__entry->center_freq1, __entry->center_freq2
#define MIN_CHANDEF_ENTRY \
__field(u32, min_control_freq) \
__field(u32, min_chan_width) \
__field(u32, min_center_freq1) \
__field(u32, min_center_freq2)
#define MIN_CHANDEF_ASSIGN(c) \
__entry->min_control_freq = (c)->chan ? (c)->chan->center_freq : 0; \
__entry->min_chan_width = (c)->width; \
__entry->min_center_freq1 = (c)->center_freq1; \
__entry->min_center_freq2 = (c)->center_freq2;
#define MIN_CHANDEF_PR_FMT " min_control:%d MHz min_width:%d min_center: %d/%d MHz"
#define MIN_CHANDEF_PR_ARG __entry->min_control_freq, __entry->min_chan_width, \
__entry->min_center_freq1, __entry->min_center_freq2
#define CHANCTX_ENTRY CHANDEF_ENTRY \
MIN_CHANDEF_ENTRY \
__field(u8, rx_chains_static) \
__field(u8, rx_chains_dynamic)
#define CHANCTX_ASSIGN CHANDEF_ASSIGN(&ctx->conf.def) \
MIN_CHANDEF_ASSIGN(&ctx->conf.min_def) \
__entry->rx_chains_static = ctx->conf.rx_chains_static; \
__entry->rx_chains_dynamic = ctx->conf.rx_chains_dynamic
#define CHANCTX_PR_FMT CHANDEF_PR_FMT " chains:%d/%d"
#define CHANCTX_PR_ARG CHANDEF_PR_ARG, \
#define CHANCTX_PR_FMT CHANDEF_PR_FMT MIN_CHANDEF_PR_FMT " chains:%d/%d"
#define CHANCTX_PR_ARG CHANDEF_PR_ARG, MIN_CHANDEF_PR_ARG, \
__entry->rx_chains_static, __entry->rx_chains_dynamic