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wifi: mac80211: Add support to indicate that a new interface is to be added

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Add support to indicate to the driver that an interface is about to be
added so that the driver could prepare its resources early if it needs
so.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20241007144851.e0e8563e1c30.Ifccc96a46a347eb15752caefc9f4eff31f75ed47@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Ilan Peer 2024-10-07 15:00:45 +03:00 committed by Johannes Berg
parent 1f3de77752
commit 074a8b54da
4 changed files with 57 additions and 0 deletions
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8
include/net/mac80211.h
View File

@ -4444,6 +4444,12 @@ struct ieee80211_prep_tx_info {
* if the requested TID-To-Link mapping can be accepted or not.
* If it's not accepted the driver may suggest a preferred mapping and
* modify @ttlm parameter with the suggested TID-to-Link mapping.
* @prep_add_interface: prepare for interface addition. This can be used by
* drivers to prepare for the addition of a new interface, e.g., allocate
* the needed resources etc. This callback doesn't guarantee that an
* interface with the specified type would be added, and thus drivers that
* implement this callback need to handle such cases. The type is the full
* &enum nl80211_iftype.
*/
struct ieee80211_ops {
void (*tx)(struct ieee80211_hw *hw,
@ -4828,6 +4834,8 @@ struct ieee80211_ops {
enum ieee80211_neg_ttlm_res
(*can_neg_ttlm)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_neg_ttlm *ttlm);
void (*prep_add_interface)(struct ieee80211_hw *hw,
enum nl80211_iftype type);
};
/**

18
net/mac80211/cfg.c
View File

@ -194,6 +194,24 @@ static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
}
}
/* Let the driver know that an interface is going to be added.
* Indicate so only for interface types that will be added to the
* driver.
*/
switch (type) {
case NL80211_IFTYPE_AP_VLAN:
break;
case NL80211_IFTYPE_MONITOR:
if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) ||
!(params->flags & MONITOR_FLAG_ACTIVE))
break;
fallthrough;
default:
drv_prep_add_interface(local,
ieee80211_vif_type_p2p(&sdata->vif));
break;
}
return wdev;
}

12
net/mac80211/driver-ops.h
View File

@ -1728,4 +1728,16 @@ drv_can_neg_ttlm(struct ieee80211_local *local,
return res;
}
static inline void
drv_prep_add_interface(struct ieee80211_local *local,
enum nl80211_iftype type)
{
trace_drv_prep_add_interface(local, type);
if (local->ops->prep_add_interface)
local->ops->prep_add_interface(&local->hw, type);
trace_drv_return_void(local);
}
#endif /* __MAC80211_DRIVER_OPS */

19
net/mac80211/trace.h
View File

@ -3154,6 +3154,25 @@ TRACE_EVENT(drv_neg_ttlm_res,
LOCAL_PR_ARG, VIF_PR_ARG, __entry->res
)
);
TRACE_EVENT(drv_prep_add_interface,
TP_PROTO(struct ieee80211_local *local,
enum nl80211_iftype type),
TP_ARGS(local, type),
TP_STRUCT__entry(LOCAL_ENTRY
__field(u32, type)
),
TP_fast_assign(LOCAL_ASSIGN;
__entry->type = type;
),
TP_printk(LOCAL_PR_FMT " type: %u\n ",
LOCAL_PR_ARG, __entry->type
)
);
#endif /* !__MAC80211_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */
#undef TRACE_INCLUDE_PATH