[RFC 3/4] P2P: Handling single channel concurrency

Jithu Jance jithujance at gmail.com
Mon Apr 9 03:18:14 EDT 2012


> Cleaned up version below. Though, I would like to see an example
> implementation for this in driver_nl80211.c, i.e., we need to get this
> functionality reviewed on the linux-wireless mailing list and included
> in the upstream kernel.
Thanks again!!. I still haven't worked on this front. This is a much
required patch for single channel concurrency case.


- Jithu
*
*

On Mon, Apr 9, 2012 at 12:06 AM, Jouni Malinen <j at w1.fi> wrote:

> On Tue, Mar 06, 2012 at 10:34:12AM +0530, Jithu Jance wrote:
> > Single channel concurrency patch [3/4]
> >
> > Hooks for implementing GO/AP channel switch. To be expanded later.
>
> Cleaned up version below. Though, I would like to see an example
> implementation for this in driver_nl80211.c, i.e., we need to get this
> functionality reviewed on the linux-wireless mailing list and included
> in the upstream kernel.
>
>
> [PATCH 2/3] P2P: Add driver op for requesting GO/AP channel switch
>
> Signed-hostap: Jithu Jance <jithu at broadcom.com>
> ---
>  src/drivers/driver.h      |   12 ++++++++++++
>  wpa_supplicant/driver_i.h |    8 ++++++++
>  2 files changed, 20 insertions(+), 0 deletions(-)
>
> diff --git a/src/drivers/driver.h b/src/drivers/driver.h
> index 329f89a..7ff1b3d 100644
> --- a/src/drivers/driver.h
> +++ b/src/drivers/driver.h
> @@ -2535,6 +2535,18 @@ struct wpa_driver_ops {
>          * conditions.
>         */
>        int (*radio_disable)(void *priv, int disabled);
> +
> +       /**
> +        * switch_channel - Announce channel switch and migrate the GO to
> the
> +        * given frequency
> +        * @priv: Private driver interface data
> +        * @freq: Frequency in MHz
> +        * Returns: 0 on success, -1 on failure
> +        *
> +        * This function is used to move the GO to the legacy STA channel
> to
> +        * avoid frequency conflict in single channel concurrency.
> +        */
> +       int (*switch_channel)(void *priv, unsigned int freq);
>  };
>
>
> diff --git a/wpa_supplicant/driver_i.h b/wpa_supplicant/driver_i.h
> index e1e921d..2ab455b 100644
> --- a/wpa_supplicant/driver_i.h
> +++ b/wpa_supplicant/driver_i.h
> @@ -672,4 +672,12 @@ static inline int wpa_drv_radio_disable(struct
> wpa_supplicant *wpa_s,
>         return wpa_s->driver->radio_disable(wpa_s->drv_priv, disabled);
>  }
>
> +static inline int wpa_drv_switch_channel(struct wpa_supplicant *wpa_s,
> +                                        unsigned int freq)
> +{
> +       if (!wpa_s->driver->switch_channel)
> +               return -1;
> +       return wpa_s->driver->switch_channel(wpa_s->drv_priv, freq);
> +}
> +
>  #endif /* DRIVER_I_H */
> --
> 1.7.4.1
>
> --
> Jouni Malinen                                            PGP id EFC895FA
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