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[MAC80211]: implement ERP info change notifications 

zd1211rw and bcm43xx are interested in being notified when ERP IE conditions
change, so that they can reprogram a register which affects how control frames
are transmitted.

This patch adds an interface similar to the one that can be found in softmac.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: Jiri Benc <jbenc@suse.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Daniel Drake 2007-07-27 15:43:24 +02:00 committed by David S. Miller
parent 7e9ed18874
commit d9430a3288
5 changed files with 51 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/net/mac80211.h
View File

@ -697,6 +697,14 @@ struct ieee80211_ops {
void (*sta_table_notification)(struct ieee80211_hw *hw,
int num_sta);
/* Handle ERP IE change notifications. Must be atomic. */
void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes,
int cts_protection, int preamble);
/* Flags for the erp_ie_changed changes parameter */
#define IEEE80211_ERP_CHANGE_PROTECTION (1<<0) /* protection flag changed */
#define IEEE80211_ERP_CHANGE_PREAMBLE (1<<1) /* barker preamble mode changed */
/* Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
* bursting) for a hardware TX queue.
* queue = IEEE80211_TX_QUEUE_*.

25
net/mac80211/ieee80211.c
View File

@ -464,8 +464,10 @@ static int ieee80211_open(struct net_device *dev)
if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
local->monitors++;
local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
} else
} else {
ieee80211_if_config(dev);
ieee80211_reset_erp_info(dev);
}
if (sdata->type == IEEE80211_IF_TYPE_STA &&
!local->user_space_mlme)
@ -748,6 +750,27 @@ int ieee80211_hw_config(struct ieee80211_local *local)
return ret;
}
void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (local->ops->erp_ie_changed)
local->ops->erp_ie_changed(local_to_hw(local), changes,
sdata->use_protection,
!sdata->short_preamble);
}
void ieee80211_reset_erp_info(struct net_device *dev)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
sdata->short_preamble = 0;
sdata->use_protection = 0;
ieee80211_erp_info_change_notify(dev,
IEEE80211_ERP_CHANGE_PROTECTION |
IEEE80211_ERP_CHANGE_PREAMBLE);
}
struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
struct dev_mc_list *prev,
void **ptr)

2
net/mac80211/ieee80211_i.h
View File

@ -788,6 +788,8 @@ struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
u8 *addr);
int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes);
void ieee80211_reset_erp_info(struct net_device *dev);
/* ieee80211_iface.c */
int ieee80211_if_add(struct net_device *dev, const char *name,

16
net/mac80211/ieee80211_ioctl.c
View File

@ -1054,17 +1054,21 @@ static int ieee80211_ioctl_prism2_param(struct net_device *dev,
break;
case PRISM2_PARAM_CTS_PROTECT_ERP_FRAMES:
if (sdata->type != IEEE80211_IF_TYPE_AP)
if (sdata->type == IEEE80211_IF_TYPE_AP) {
sdata->use_protection = !!value;
ieee80211_erp_info_change_notify(dev, IEEE80211_ERP_CHANGE_PROTECTION);
} else {
ret = -ENOENT;
else
sdata->use_protection = value;
}
break;
case PRISM2_PARAM_PREAMBLE:
if (sdata->type != IEEE80211_IF_TYPE_AP)
if (sdata->type != IEEE80211_IF_TYPE_AP) {
sdata->short_preamble = !!value;
ieee80211_erp_info_change_notify(dev, IEEE80211_ERP_CHANGE_PREAMBLE);
} else {
ret = -ENOENT;
else
sdata->short_preamble = value;
}
break;
case PRISM2_PARAM_STAT_TIME:

10
net/mac80211/ieee80211_sta.c
View File

@ -319,6 +319,7 @@ static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
u8 changes = 0;
if (use_protection != sdata->use_protection) {
if (net_ratelimit()) {
@ -329,6 +330,7 @@ static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
MAC_ARG(ifsta->bssid));
}
sdata->use_protection = use_protection;
changes |= IEEE80211_ERP_CHANGE_PROTECTION;
}
if (!preamble_mode != sdata->short_preamble) {
@ -341,7 +343,11 @@ static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
MAC_ARG(ifsta->bssid));
}
sdata->short_preamble = !preamble_mode;
changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
}
if (changes)
ieee80211_erp_info_change_notify(dev, changes);
}
@ -400,7 +406,6 @@ static void ieee80211_set_associated(struct net_device *dev,
struct ieee80211_if_sta *ifsta, int assoc)
{
union iwreq_data wrqu;
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (ifsta->associated == assoc)
return;
@ -428,8 +433,7 @@ static void ieee80211_set_associated(struct net_device *dev,
ieee80211_sta_send_associnfo(dev, ifsta);
} else {
netif_carrier_off(dev);
sdata->short_preamble = 0;
sdata->use_protection = 0;
ieee80211_reset_erp_info(dev);
memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
}
wrqu.ap_addr.sa_family = ARPHRD_ETHER;