static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
iwl_mvm_prepare_mac_removal(mvm, vif);
mutex_lock(&mvm->mutex);
iwl_mvm_vif_dbgfs_clean(mvm, vif);
/*
* For AP/GO interface, the tear down of the resources allocated to the
* interface is be handled as part of the stop_ap flow.
*/
if (vif->type == NL80211_IFTYPE_AP) {
iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
goto out_release;
}
if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
mvm->p2p_device_vif = NULL;
iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
iwl_mvm_binding_remove_vif(mvm, vif);
iwl_mvm_phy_ctxt_remove(mvm, mvmvif->phy_ctxt);
mvmvif->phy_ctxt = NULL;
}
/*
* TODO: remove this temporary code.
* Currently MVM FW supports power management only on single MAC.
* Check if only one additional interface remains after removing
* current one. Update power mode on the remaining interface.
*/
if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
mvm->vif_count--;
IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
mvm->vif_count);
if (mvm->vif_count == 1) {
ieee80211_iterate_active_interfaces(
mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_power_update_iterator, mvm);
}
iwl_mvm_mac_ctxt_remove(mvm, vif);
out_release:
iwl_mvm_mac_ctxt_release(mvm, vif);
mutex_unlock(&mvm->mutex);
}
static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
u32 tfd_msk = 0, ac;
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
tfd_msk |= BIT(vif->hw_queue[ac]);
if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
tfd_msk |= BIT(vif->cab_queue);
if (tfd_msk) {
mutex_lock(&mvm->mutex);
iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
mutex_unlock(&mvm->mutex);
}
if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
/*
* Flush the ROC worker which will flush the OFFCHANNEL queue.
* We assume here that all the packets sent to the OFFCHANNEL
* queue are sent in ROC session.
*/
flush_work(&mvm->roc_done_wk);
} else {
/*
* By now, all the AC queues are empty. The AGG queues are
* empty too. We already got all the Tx responses for all the
* packets in the queues. The drain work can have been
* triggered. Flush it. This work item takes the mutex, so kill
* it before we take it.
*/
flush_work(&mvm->sta_drained_wk);
}
mutex_lock(&mvm->mutex);
/*
* For AP/GO interface, the tear down of the resources allocated to the
* interface should be handled as part of the bss_info_changed flow.
*/
if (vif->type == NL80211_IFTYPE_AP) {
iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
goto out_release;
}
if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
mvm->p2p_device_vif = NULL;
iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
iwl_mvm_binding_remove_vif(mvm, vif);
iwl_mvm_phy_ctxt_remove(mvm, mvmvif->phy_ctxt);
mvmvif->phy_ctxt = NULL;
}
/*
* TODO: remove this temporary code.
* Currently MVM FW supports power management only on single MAC.
* Check if only one additional interface remains after removing
* current one. Update power mode on the remaining interface.
*/
if (mvm->vif_count)
mvm->vif_count--;
IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
mvm->vif_count);
if (mvm->vif_count == 1) {
ieee80211_iterate_active_interfaces(
mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_power_update_iterator, mvm);
}
iwl_mvm_mac_ctxt_remove(mvm, vif);
out_release:
iwl_mvm_mac_ctxt_release(mvm, vif);
mutex_unlock(&mvm->mutex);
}
static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
int ret;
/*
* Not much to do here. The stack will not allow interface
* types or combinations that we didn't advertise, so we
* don't really have to check the types.
*/
mutex_lock(&mvm->mutex);
/* Allocate resources for the MAC context, and add it the the fw */
ret = iwl_mvm_mac_ctxt_init(mvm, vif);
if (ret)
goto out_unlock;
/*
* The AP binding flow can be done only after the beacon
* template is configured (which happens only in the mac80211
* start_ap() flow), and adding the broadcast station can happen
* only after the binding.
* In addition, since modifying the MAC before adding a bcast
* station is not allowed by the FW, delay the adding of MAC context to
* the point where we can also add the bcast station.
* In short: there's not much we can do at this point, other than
* allocating resources :)
*/
if (vif->type == NL80211_IFTYPE_AP) {
u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
qmask);
if (ret) {
IWL_ERR(mvm, "Failed to allocate bcast sta\n");
goto out_release;
}
goto out_unlock;
}
/*
* TODO: remove this temporary code.
* Currently MVM FW supports power management only on single MAC.
* Iterate and disable PM on all active interfaces.
* Note: the method below does not count the new interface being added
* at this moment.
*/
mvm->vif_count++;
if (mvm->vif_count > 1) {
IWL_DEBUG_MAC80211(mvm,
"Disable power on existing interfaces\n");
ieee80211_iterate_active_interfaces_atomic(
mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_pm_disable_iterator, mvm);
}
ret = iwl_mvm_mac_ctxt_add(mvm, vif);
if (ret)
goto out_release;
/*
* Update power state on the new interface. Admittedly, based on
* mac80211 logics this power update will disable power management
*/
iwl_mvm_power_update_mode(mvm, vif);
/*
* P2P_DEVICE interface does not have a channel context assigned to it,
* so a dedicated PHY context is allocated to it and the corresponding
* MAC context is bound to it at this stage.
*/
if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
struct ieee80211_channel *chan;
struct cfg80211_chan_def chandef;
mvmvif->phy_ctxt = &mvm->phy_ctxt_roc;
/*
* The channel used here isn't relevant as it's
* going to be overwritten as part of the ROC flow.
* For now use the first channel we have.
*/
chan = &mvm->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels[0];
cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT);
ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt,
&chandef, 1, 1);
if (ret)
goto out_remove_mac;
ret = iwl_mvm_binding_add_vif(mvm, vif);
if (ret)
goto out_remove_phy;
ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
if (ret)
goto out_unbind;
/* Save a pointer to p2p device vif, so it can later be used to
* update the p2p device MAC when a GO is started/stopped */
mvm->p2p_device_vif = vif;
}
goto out_unlock;
out_unbind:
iwl_mvm_binding_remove_vif(mvm, vif);
out_remove_phy:
iwl_mvm_phy_ctxt_remove(mvm, mvmvif->phy_ctxt);
out_remove_mac:
mvmvif->phy_ctxt = NULL;
iwl_mvm_mac_ctxt_remove(mvm, vif);
out_release:
/*
* TODO: remove this temporary code.
* Currently MVM FW supports power management only on single MAC.
* Check if only one additional interface remains after rereasing
* current one. Update power mode on the remaining interface.
*/
mvm->vif_count--;
IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
mvm->vif_count);
if (mvm->vif_count == 1) {
ieee80211_iterate_active_interfaces(
mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_power_update_iterator, mvm);
}
iwl_mvm_mac_ctxt_release(mvm, vif);
out_unlock:
mutex_unlock(&mvm->mutex);
return ret;
}
