[PATCH v2 2/2] mac80211: store tx power value from user to station

[Ben Greear]

On 01/31/2017 10:41 AM, Ashok Raj Nagarajan wrote:
> This patch introduce a new driver callback drv_sta_set_txpwr. This API will
> copy the transmit power value passed from user space and call the driver
> callback to set the tx power for the station.
>
> Signed-off-by: Ashok Raj Nagarajan <arnagara at qti.qualcomm.com>
> ---
>  include/net/mac80211.h    |  6 ++++++
>  net/mac80211/cfg.c        |  7 +++++++
>  net/mac80211/driver-ops.c | 21 +++++++++++++++++++++
>  net/mac80211/driver-ops.h |  5 +++++
>  net/mac80211/trace.h      | 27 +++++++++++++++++++++++++++
>  5 files changed, 66 insertions(+)
>
> diff --git a/include/net/mac80211.h b/include/net/mac80211.h
> index 5345d35..e059d5a 100644
> --- a/include/net/mac80211.h
> +++ b/include/net/mac80211.h
> @@ -1777,6 +1777,8 @@ struct ieee80211_sta_rates {
>   *	This is defined by the spec (IEEE 802.11-2012 section 8.3.2.2 NOTE 2).
>   * @support_p2p_ps: indicates whether the STA supports P2P PS mechanism or not.
>   * @max_rc_amsdu_len: Maximum A-MSDU size in bytes recommended by rate control.
> + * @txpwr: indicates the tx power, in dBm, to be used when sending data frames
> + *	to the STA. Value of 0 means, automatic (default) tx power.

Atheros NICs use 1/2 dBm increments internally, so maybe pass down mBm to the driver so you don't
loose the granularity?  (Other NICs may potentially have even finer control.)

Thanks,
Ben

-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com