linux-kernel - Re: [PATCH 1/2] mac80211: add power management support

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Date:	Fri, 16 Nov 2007 19:53:26 +0100
From:	Miguel Botón <mboton.lkml@...il.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	linux-wireless@...r.kernel.org, linville@...driver.com,
	yi.zhu@...el.com
Subject: Re: [PATCH 1/2] mac80211: add power management support

Ok, the previous patch had a little error.

--

This patch adds power management support in mac80211.

This allows us to enable power management through the "iwconfig <device> power 
<off/on>" command.
The code is based on "mac80211-10.0.0" but it is a little bit modified.

Signed-off-by: Miguel Botón <mboton@...il.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 5fcc4c1..c82b6fa 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -452,6 +452,8 @@ struct ieee80211_conf {
 	u8 antenna_max;
 	u8 antenna_sel_tx;
 	u8 antenna_sel_rx;
+
+	u8 power_management_enable;     /* flag to enable/disable power management 
*/
 };
 
 /**
diff --git a/net/mac80211/ieee80211_ioctl.c b/net/mac80211/ieee80211_ioctl.c
index 6caa3ec..f5eebec 100644
--- a/net/mac80211/ieee80211_ioctl.c
+++ b/net/mac80211/ieee80211_ioctl.c
@@ -674,6 +687,51 @@ static int ieee80211_ioctl_giwtxpower(struct net_device 
*dev,
 	return 0;
 }
 
+static int ieee80211_ioctl_siwpower(struct net_device *dev,
+				    struct iw_request_info *info,
+				    union iwreq_data *wrqu,
+				    char *extra)
+{
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_conf *conf = &local->hw.conf;
+
+	if (wrqu->power.disabled) {
+		conf->power_management_enable = 0;
+		if (ieee80211_hw_config(local))
+			return -EINVAL;
+		return 0;
+	}
+
+	switch (wrqu->power.flags & IW_POWER_MODE) {
+	case IW_POWER_ON:       /* If not specified */
+	case IW_POWER_MODE:     /* If set all mask */
+	case IW_POWER_ALL_R:    /* If explicitely state all */
+		break;
+	default:                /* Otherwise we don't support it */
+		return -EINVAL;
+	}
+
+	conf->power_management_enable = 1;
+
+	if (ieee80211_hw_config(local))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int ieee80211_ioctl_giwpower(struct net_device *dev,
+				    struct iw_request_info *info,
+				    union iwreq_data *wrqu,
+				    char *extra)
+{
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_conf *conf = &local->hw.conf;
+
+	wrqu->power.disabled = !conf->power_management_enable;
+
+	return 0;
+}
+
 static int ieee80211_ioctl_siwrts(struct net_device *dev,
 				  struct iw_request_info *info,
 				  struct iw_param *rts, char *extra)
@@ -1111,8 +1166,8 @@ static const iw_handler ieee80211_handler[] =
 	(iw_handler) ieee80211_ioctl_giwretry,		/* SIOCGIWRETRY */
 	(iw_handler) ieee80211_ioctl_siwencode,		/* SIOCSIWENCODE */
 	(iw_handler) ieee80211_ioctl_giwencode,		/* SIOCGIWENCODE */
-	(iw_handler) NULL,				/* SIOCSIWPOWER */
-	(iw_handler) NULL,				/* SIOCGIWPOWER */
+	(iw_handler) ieee80211_ioctl_siwpower,		/* SIOCSIWPOWER */
+	(iw_handler) ieee80211_ioctl_giwpower,		/* SIOCGIWPOWER */
 	(iw_handler) NULL,				/* -- hole -- */
 	(iw_handler) NULL,				/* -- hole -- */
 	(iw_handler) ieee80211_ioctl_siwgenie,		/* SIOCSIWGENIE */

-- 
	Miguel Botón
-
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