static void ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_sta *sta;
int ret;
assert_key_lock();
might_sleep();
if (!key->local->ops->set_key)
return;
sta = get_sta_for_key(key);
sdata = key->sdata;
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
sdata = container_of(sdata->bss,
struct ieee80211_sub_if_data,
u.ap);
ret = drv_set_key(key->local, SET_KEY, &sdata->vif, sta, &key->conf);
if (!ret) {
spin_lock(&todo_lock);
key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
spin_unlock(&todo_lock);
}
if (ret && ret != -ENOSPC && ret != -EOPNOTSUPP)
printk(KERN_ERR "mac80211-%s: failed to set key "
"(%d, %pM) to hardware (%d)\n",
wiphy_name(key->local->hw.wiphy),
key->conf.keyidx, sta ? sta->addr : bcast_addr, ret);
}
static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_sta *sta;
int ret;
assert_key_lock();
might_sleep();
if (!key || !key->local->ops->set_key)
return;
spin_lock_bh(&todo_lock);
if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
spin_unlock_bh(&todo_lock);
return;
}
spin_unlock_bh(&todo_lock);
sta = get_sta_for_key(key);
sdata = key->sdata;
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
sdata = container_of(sdata->bss,
struct ieee80211_sub_if_data,
u.ap);
ret = drv_set_key(key->local, DISABLE_KEY, &sdata->vif,
sta, &key->conf);
if (ret)
printk(KERN_ERR "mac80211-%s: failed to remove key "
"(%d, %pM) from hardware (%d)\n",
wiphy_name(key->local->hw.wiphy),
key->conf.keyidx, sta ? sta->addr : bcast_addr, ret);
spin_lock_bh(&todo_lock);
key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
spin_unlock_bh(&todo_lock);
}
static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_sta *sta;
int ret;
might_sleep();
if (!key || !key->local->ops->set_key)
return;
assert_key_lock(key->local);
if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
return;
sta = get_sta_for_key(key);
sdata = key->sdata;
if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)))
increment_tailroom_need_count(sdata);
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
sdata = container_of(sdata->bss,
struct ieee80211_sub_if_data,
u.ap);
ret = drv_set_key(key->local, DISABLE_KEY, sdata,
sta, &key->conf);
if (ret)
wiphy_err(key->local->hw.wiphy,
"failed to remove key (%d, %pM) from hardware (%d)\n",
key->conf.keyidx, sta ? sta->addr : bcast_addr, ret);
key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
}
static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_sta *sta;
int ret;
might_sleep();
if (!key->local->ops->set_key)
goto out_unsupported;
assert_key_lock(key->local);
sta = get_sta_for_key(key);
/*
* If this is a per-STA GTK, check if it
* is supported; if not, return.
*/
if (sta && !(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE) &&
!(key->local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK))
goto out_unsupported;
sdata = key->sdata;
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
/*
* The driver doesn't know anything about VLAN interfaces.
* Hence, don't send GTKs for VLAN interfaces to the driver.
*/
if (!(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE))
goto out_unsupported;
sdata = container_of(sdata->bss,
struct ieee80211_sub_if_data,
u.ap);
}
ret = drv_set_key(key->local, SET_KEY, sdata, sta, &key->conf);
if (!ret) {
key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)))
sdata->crypto_tx_tailroom_needed_cnt--;
return 0;
}
if (ret != -ENOSPC && ret != -EOPNOTSUPP)
wiphy_err(key->local->hw.wiphy,
"failed to set key (%d, %pM) to hardware (%d)\n",
key->conf.keyidx, sta ? sta->addr : bcast_addr, ret);
out_unsupported:
switch (key->conf.cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
case WLAN_CIPHER_SUITE_TKIP:
case WLAN_CIPHER_SUITE_CCMP:
case WLAN_CIPHER_SUITE_AES_CMAC:
/* all of these we can do in software */
return 0;
default:
return -EINVAL;
}
}
