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mac80211: add suspend/resume callbacks

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This patch introduces suspend and resume callbacks to mac80211,
allowing mac80211 to quiesce its state (bringing down interfaces,
removing keys, etc) in preparation for suspend.  cfg80211 will call
the suspend hook before the device suspend, and resume hook after
the device resume.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Bob Copeland 2009-01-19 11:20:53 -05:00 committed by John W. Linville
parent 0378b3f1c4
commit 665af4fc89
4 changed files with 137 additions and 0 deletions
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2
net/mac80211/Makefile
View file

@ -38,6 +38,8 @@ mac80211-$(CONFIG_MAC80211_MESH) += \
mesh_plink.o \
mesh_hwmp.o
mac80211-$(CONFIG_PM) += pm.o
# objects for PID algorithm
rc80211_pid-y := rc80211_pid_algo.o
rc80211_pid-$(CONFIG_MAC80211_DEBUGFS) += rc80211_pid_debugfs.o

17
net/mac80211/cfg.c
View file

@ -1256,6 +1256,21 @@ static int ieee80211_set_mgmt_extra_ie(struct wiphy *wiphy,
return ret;
}
#ifdef CONFIG_PM
static int ieee80211_suspend(struct wiphy *wiphy)
{
return __ieee80211_suspend(wiphy_priv(wiphy));
}
static int ieee80211_resume(struct wiphy *wiphy)
{
return __ieee80211_resume(wiphy_priv(wiphy));
}
#else
#define ieee80211_suspend NULL
#define ieee80211_resume NULL
#endif
struct cfg80211_ops mac80211_config_ops = {
.add_virtual_intf = ieee80211_add_iface,
.del_virtual_intf = ieee80211_del_iface,
@ -1286,4 +1301,6 @@ struct cfg80211_ops mac80211_config_ops = {
.set_txq_params = ieee80211_set_txq_params,
.set_channel = ieee80211_set_channel,
.set_mgmt_extra_ie = ieee80211_set_mgmt_extra_ie,
.suspend = ieee80211_suspend,
.resume = ieee80211_resume,
};

4
net/mac80211/ieee80211_i.h
View file

@ -1006,6 +1006,10 @@ void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
u16 capab_info, u8 *pwr_constr_elem,
u8 pwr_constr_elem_len);
/* Suspend/resume */
int __ieee80211_suspend(struct ieee80211_hw *hw);
int __ieee80211_resume(struct ieee80211_hw *hw);
/* utility functions/constants */
extern void *mac80211_wiphy_privid; /* for wiphy privid */
extern const unsigned char rfc1042_header[6];

114
net/mac80211/pm.c Normal file
View file

@ -0,0 +1,114 @@
#include <net/mac80211.h>
#include <net/rtnetlink.h>
#include "ieee80211_i.h"
#include "led.h"
int __ieee80211_suspend(struct ieee80211_hw *hw)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
struct ieee80211_if_init_conf conf;
struct sta_info *sta;
flush_workqueue(local->hw.workqueue);
/* disable keys */
list_for_each_entry(sdata, &local->interfaces, list)
ieee80211_disable_keys(sdata);
/* remove STAs */
list_for_each_entry(sta, &local->sta_list, list) {
if (local->ops->sta_notify) {
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
sdata = container_of(sdata->bss,
struct ieee80211_sub_if_data,
u.ap);
local->ops->sta_notify(hw, &sdata->vif,
STA_NOTIFY_REMOVE, &sta->sta);
}
}
/* remove all interfaces */
list_for_each_entry(sdata, &local->interfaces, list) {
if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
sdata->vif.type != NL80211_IFTYPE_MONITOR &&
netif_running(sdata->dev)) {
conf.vif = &sdata->vif;
conf.type = sdata->vif.type;
conf.mac_addr = sdata->dev->dev_addr;
local->ops->remove_interface(hw, &conf);
}
}
/* stop hardware */
if (local->open_count) {
ieee80211_led_radio(local, false);
local->ops->stop(hw);
}
return 0;
}
int __ieee80211_resume(struct ieee80211_hw *hw)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
struct ieee80211_if_init_conf conf;
struct sta_info *sta;
int res;
/* restart hardware */
if (local->open_count) {
res = local->ops->start(hw);
ieee80211_led_radio(local, hw->conf.radio_enabled);
}
/* add interfaces */
list_for_each_entry(sdata, &local->interfaces, list) {
if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
sdata->vif.type != NL80211_IFTYPE_MONITOR &&
netif_running(sdata->dev)) {
conf.vif = &sdata->vif;
conf.type = sdata->vif.type;
conf.mac_addr = sdata->dev->dev_addr;
res = local->ops->add_interface(hw, &conf);
}
}
/* add STAs back */
list_for_each_entry(sta, &local->sta_list, list) {
if (local->ops->sta_notify) {
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
sdata = container_of(sdata->bss,
struct ieee80211_sub_if_data,
u.ap);
local->ops->sta_notify(hw, &sdata->vif,
STA_NOTIFY_ADD, &sta->sta);
}
}
/* add back keys */
list_for_each_entry(sdata, &local->interfaces, list)
if (netif_running(sdata->dev))
ieee80211_enable_keys(sdata);
/* setup RTS threshold */
if (local->ops->set_rts_threshold)
local->ops->set_rts_threshold(hw, local->rts_threshold);
/* reconfigure hardware */
ieee80211_hw_config(local, ~0);
netif_addr_lock_bh(local->mdev);
ieee80211_configure_filter(local);
netif_addr_unlock_bh(local->mdev);
return 0;
}