34e895075e
Many drivers would like to sleep during station addition and removal, and currently have a high complexity there from not being able to. This introduces two new callbacks sta_add() and sta_remove() that drivers can implement instead of using sta_notify() and that can sleep, and the new sta_add() callback is also allowed to fail. The reason we didn't do this previously is that the IBSS code wants to insert stations from the RX path, which is a tasklet, so cannot sleep. This patch will keep the station allocation in that path, but moves adding the station to the driver out of line. Since the addition can now fail, we can have IBSS peer structs the driver rejected -- in that case we still talk to the station but never tell the driver about it in the control.sta pointer. If there will ever be a driver that has a low limit on the number of stations and that cannot talk to any stations that are not known to it, we need to do come up with a new strategy of handling larger IBSSs, maybe quicker expiry or rejecting peers. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
375 lines
8.6 KiB
C
375 lines
8.6 KiB
C
#ifndef __MAC80211_DRIVER_OPS
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#define __MAC80211_DRIVER_OPS
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#include <net/mac80211.h>
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#include "ieee80211_i.h"
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#include "driver-trace.h"
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static inline int drv_tx(struct ieee80211_local *local, struct sk_buff *skb)
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{
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return local->ops->tx(&local->hw, skb);
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}
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static inline int drv_start(struct ieee80211_local *local)
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{
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int ret;
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might_sleep();
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local->started = true;
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smp_mb();
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ret = local->ops->start(&local->hw);
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trace_drv_start(local, ret);
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return ret;
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}
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static inline void drv_stop(struct ieee80211_local *local)
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{
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might_sleep();
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local->ops->stop(&local->hw);
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trace_drv_stop(local);
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/* sync away all work on the tasklet before clearing started */
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tasklet_disable(&local->tasklet);
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tasklet_enable(&local->tasklet);
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barrier();
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local->started = false;
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}
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static inline int drv_add_interface(struct ieee80211_local *local,
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struct ieee80211_vif *vif)
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{
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int ret;
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might_sleep();
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ret = local->ops->add_interface(&local->hw, vif);
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trace_drv_add_interface(local, vif_to_sdata(vif), ret);
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return ret;
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}
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static inline void drv_remove_interface(struct ieee80211_local *local,
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struct ieee80211_vif *vif)
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{
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might_sleep();
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local->ops->remove_interface(&local->hw, vif);
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trace_drv_remove_interface(local, vif_to_sdata(vif));
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}
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static inline int drv_config(struct ieee80211_local *local, u32 changed)
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{
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int ret;
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might_sleep();
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ret = local->ops->config(&local->hw, changed);
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trace_drv_config(local, changed, ret);
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return ret;
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}
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static inline void drv_bss_info_changed(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct ieee80211_bss_conf *info,
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u32 changed)
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{
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might_sleep();
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if (local->ops->bss_info_changed)
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local->ops->bss_info_changed(&local->hw, &sdata->vif, info, changed);
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trace_drv_bss_info_changed(local, sdata, info, changed);
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}
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static inline u64 drv_prepare_multicast(struct ieee80211_local *local,
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int mc_count,
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struct dev_addr_list *mc_list)
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{
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u64 ret = 0;
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if (local->ops->prepare_multicast)
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ret = local->ops->prepare_multicast(&local->hw, mc_count,
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mc_list);
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trace_drv_prepare_multicast(local, mc_count, ret);
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return ret;
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}
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static inline void drv_configure_filter(struct ieee80211_local *local,
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unsigned int changed_flags,
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unsigned int *total_flags,
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u64 multicast)
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{
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might_sleep();
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local->ops->configure_filter(&local->hw, changed_flags, total_flags,
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multicast);
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trace_drv_configure_filter(local, changed_flags, total_flags,
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multicast);
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}
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static inline int drv_set_tim(struct ieee80211_local *local,
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struct ieee80211_sta *sta, bool set)
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{
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int ret = 0;
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if (local->ops->set_tim)
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ret = local->ops->set_tim(&local->hw, sta, set);
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trace_drv_set_tim(local, sta, set, ret);
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return ret;
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}
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static inline int drv_set_key(struct ieee80211_local *local,
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enum set_key_cmd cmd,
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struct ieee80211_sub_if_data *sdata,
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struct ieee80211_sta *sta,
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struct ieee80211_key_conf *key)
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{
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int ret;
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might_sleep();
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ret = local->ops->set_key(&local->hw, cmd, &sdata->vif, sta, key);
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trace_drv_set_key(local, cmd, sdata, sta, key, ret);
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return ret;
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}
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static inline void drv_update_tkip_key(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct ieee80211_key_conf *conf,
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struct sta_info *sta, u32 iv32,
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u16 *phase1key)
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{
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struct ieee80211_sta *ista = NULL;
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if (sta)
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ista = &sta->sta;
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if (local->ops->update_tkip_key)
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local->ops->update_tkip_key(&local->hw, &sdata->vif, conf,
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ista, iv32, phase1key);
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trace_drv_update_tkip_key(local, sdata, conf, ista, iv32);
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}
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static inline int drv_hw_scan(struct ieee80211_local *local,
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struct cfg80211_scan_request *req)
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{
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int ret;
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might_sleep();
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ret = local->ops->hw_scan(&local->hw, req);
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trace_drv_hw_scan(local, req, ret);
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return ret;
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}
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static inline void drv_sw_scan_start(struct ieee80211_local *local)
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{
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might_sleep();
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if (local->ops->sw_scan_start)
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local->ops->sw_scan_start(&local->hw);
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trace_drv_sw_scan_start(local);
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}
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static inline void drv_sw_scan_complete(struct ieee80211_local *local)
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{
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might_sleep();
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if (local->ops->sw_scan_complete)
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local->ops->sw_scan_complete(&local->hw);
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trace_drv_sw_scan_complete(local);
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}
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static inline int drv_get_stats(struct ieee80211_local *local,
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struct ieee80211_low_level_stats *stats)
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{
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int ret = -EOPNOTSUPP;
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might_sleep();
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if (local->ops->get_stats)
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ret = local->ops->get_stats(&local->hw, stats);
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trace_drv_get_stats(local, stats, ret);
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return ret;
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}
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static inline void drv_get_tkip_seq(struct ieee80211_local *local,
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u8 hw_key_idx, u32 *iv32, u16 *iv16)
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{
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if (local->ops->get_tkip_seq)
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local->ops->get_tkip_seq(&local->hw, hw_key_idx, iv32, iv16);
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trace_drv_get_tkip_seq(local, hw_key_idx, iv32, iv16);
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}
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static inline int drv_set_rts_threshold(struct ieee80211_local *local,
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u32 value)
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{
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int ret = 0;
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might_sleep();
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if (local->ops->set_rts_threshold)
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ret = local->ops->set_rts_threshold(&local->hw, value);
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trace_drv_set_rts_threshold(local, value, ret);
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return ret;
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}
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static inline int drv_set_coverage_class(struct ieee80211_local *local,
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u8 value)
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{
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int ret = 0;
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might_sleep();
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if (local->ops->set_coverage_class)
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local->ops->set_coverage_class(&local->hw, value);
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else
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ret = -EOPNOTSUPP;
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trace_drv_set_coverage_class(local, value, ret);
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return ret;
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}
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static inline void drv_sta_notify(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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enum sta_notify_cmd cmd,
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struct ieee80211_sta *sta)
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{
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if (local->ops->sta_notify)
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local->ops->sta_notify(&local->hw, &sdata->vif, cmd, sta);
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trace_drv_sta_notify(local, sdata, cmd, sta);
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}
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static inline int drv_sta_add(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct ieee80211_sta *sta)
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{
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int ret = 0;
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might_sleep();
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if (local->ops->sta_add)
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ret = local->ops->sta_add(&local->hw, &sdata->vif, sta);
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else if (local->ops->sta_notify)
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local->ops->sta_notify(&local->hw, &sdata->vif,
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STA_NOTIFY_ADD, sta);
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trace_drv_sta_add(local, sdata, sta, ret);
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return ret;
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}
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static inline void drv_sta_remove(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct ieee80211_sta *sta)
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{
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might_sleep();
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if (local->ops->sta_remove)
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local->ops->sta_remove(&local->hw, &sdata->vif, sta);
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else if (local->ops->sta_notify)
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local->ops->sta_notify(&local->hw, &sdata->vif,
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STA_NOTIFY_REMOVE, sta);
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trace_drv_sta_remove(local, sdata, sta);
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}
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static inline int drv_conf_tx(struct ieee80211_local *local, u16 queue,
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const struct ieee80211_tx_queue_params *params)
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{
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int ret = -EOPNOTSUPP;
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might_sleep();
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if (local->ops->conf_tx)
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ret = local->ops->conf_tx(&local->hw, queue, params);
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trace_drv_conf_tx(local, queue, params, ret);
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return ret;
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}
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static inline int drv_get_tx_stats(struct ieee80211_local *local,
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struct ieee80211_tx_queue_stats *stats)
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{
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int ret = local->ops->get_tx_stats(&local->hw, stats);
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trace_drv_get_tx_stats(local, stats, ret);
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return ret;
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}
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static inline u64 drv_get_tsf(struct ieee80211_local *local)
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{
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u64 ret = -1ULL;
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might_sleep();
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if (local->ops->get_tsf)
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ret = local->ops->get_tsf(&local->hw);
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trace_drv_get_tsf(local, ret);
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return ret;
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}
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static inline void drv_set_tsf(struct ieee80211_local *local, u64 tsf)
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{
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might_sleep();
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if (local->ops->set_tsf)
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local->ops->set_tsf(&local->hw, tsf);
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trace_drv_set_tsf(local, tsf);
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}
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static inline void drv_reset_tsf(struct ieee80211_local *local)
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{
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might_sleep();
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if (local->ops->reset_tsf)
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local->ops->reset_tsf(&local->hw);
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trace_drv_reset_tsf(local);
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}
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static inline int drv_tx_last_beacon(struct ieee80211_local *local)
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{
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int ret = 1;
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might_sleep();
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if (local->ops->tx_last_beacon)
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ret = local->ops->tx_last_beacon(&local->hw);
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trace_drv_tx_last_beacon(local, ret);
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return ret;
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}
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static inline int drv_ampdu_action(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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enum ieee80211_ampdu_mlme_action action,
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struct ieee80211_sta *sta, u16 tid,
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u16 *ssn)
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{
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int ret = -EOPNOTSUPP;
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if (local->ops->ampdu_action)
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ret = local->ops->ampdu_action(&local->hw, &sdata->vif, action,
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sta, tid, ssn);
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trace_drv_ampdu_action(local, sdata, action, sta, tid, ssn, ret);
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return ret;
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}
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static inline void drv_rfkill_poll(struct ieee80211_local *local)
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{
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might_sleep();
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if (local->ops->rfkill_poll)
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local->ops->rfkill_poll(&local->hw);
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}
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static inline void drv_flush(struct ieee80211_local *local, bool drop)
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{
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might_sleep();
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trace_drv_flush(local, drop);
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if (local->ops->flush)
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local->ops->flush(&local->hw, drop);
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}
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#endif /* __MAC80211_DRIVER_OPS */
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