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cfg80211: Pass new RSSI level in CQM RSSI notification

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Update the drivers to pass the RSSI level as a cfg80211_cqm_rssi_notify
parameter and pass this value to userspace in a new nl80211 attribute.
This helps both userspace and also helps in the implementation of the
multiple RSSI thresholds CQM mechanism.

Note for marvell/mwifiex I pass 0 for the RSSI value because the new
RSSI value is not available to the driver at the time of the
cfg80211_cqm_rssi_notify call, but the driver queries the new value
immediately after that, so it is actually available just a moment later
if we wanted to defer caling cfg80211_cqm_rssi_notify until that moment.
Without this, the new cfg80211 code (patch 3) will call .get_station
which will send a duplicate HostCmd_CMD_RSSI_INFO command to the hardware.

Signed-off-by: Andrew Zaborowski <andrew.zaborowski@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Andrzej Zaborowski 2017-01-25 12:43:41 +01:00 committed by Johannes Berg
parent 769f07d8f0
commit bee427b862
7 changed files with 23 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/wireless/marvell/mwifiex/sta_event.c
View File

@ -824,7 +824,7 @@ int mwifiex_process_sta_event(struct mwifiex_private *priv)
case EVENT_RSSI_LOW:
cfg80211_cqm_rssi_notify(priv->netdev,
NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
GFP_KERNEL);
0, GFP_KERNEL);
mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO,
HostCmd_ACT_GEN_GET, 0, NULL, false);
priv->subsc_evt_rssi_state = RSSI_LOW_RECVD;
@ -839,7 +839,7 @@ int mwifiex_process_sta_event(struct mwifiex_private *priv)
case EVENT_RSSI_HIGH:
cfg80211_cqm_rssi_notify(priv->netdev,
NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
GFP_KERNEL);
0, GFP_KERNEL);
mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO,
HostCmd_ACT_GEN_GET, 0, NULL, false);
priv->subsc_evt_rssi_state = RSSI_HIGH_RECVD;

2
drivers/net/wireless/rndis_wlan.c
View File

@ -3187,7 +3187,7 @@ static void rndis_do_cqm(struct usbnet *usbdev, s32 rssi)
return;
priv->last_cqm_event_rssi = rssi;
cfg80211_cqm_rssi_notify(usbdev->net, event, GFP_KERNEL);
cfg80211_cqm_rssi_notify(usbdev->net, event, rssi, GFP_KERNEL);
}
#define DEVICE_POLLER_JIFFIES (HZ)

3
include/net/cfg80211.h
View File

@ -5390,6 +5390,7 @@ void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
* cfg80211_cqm_rssi_notify - connection quality monitoring rssi event
* @dev: network device
* @rssi_event: the triggered RSSI event
* @rssi_level: new RSSI level value or 0 if not available
* @gfp: context flags
*
* This function is called when a configured connection quality monitoring
@ -5397,7 +5398,7 @@ void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
*/
void cfg80211_cqm_rssi_notify(struct net_device *dev,
enum nl80211_cqm_rssi_threshold_event rssi_event,
gfp_t gfp);
s32 rssi_level, gfp_t gfp);
/**
* cfg80211_cqm_pktloss_notify - notify userspace about packetloss to peer

3
include/uapi/linux/nl80211.h
View File

@ -3952,6 +3952,8 @@ enum nl80211_ps_state {
* %NL80211_CMD_NOTIFY_CQM. Set to 0 to turn off TX error reporting.
* @NL80211_ATTR_CQM_BEACON_LOSS_EVENT: flag attribute that's set in a beacon
* loss event
* @NL80211_ATTR_CQM_RSSI_LEVEL: the RSSI value in dBm that triggered the
* RSSI threshold event.
* @__NL80211_ATTR_CQM_AFTER_LAST: internal
* @NL80211_ATTR_CQM_MAX: highest key attribute
*/
@ -3965,6 +3967,7 @@ enum nl80211_attr_cqm {
NL80211_ATTR_CQM_TXE_PKTS,
NL80211_ATTR_CQM_TXE_INTVL,
NL80211_ATTR_CQM_BEACON_LOSS_EVENT,
NL80211_ATTR_CQM_RSSI_LEVEL,
/* keep last */
__NL80211_ATTR_CQM_AFTER_LAST,

2
net/mac80211/mlme.c
View File

@ -5048,7 +5048,7 @@ void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
}
EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);

9
net/wireless/nl80211.c
View File

@ -9474,6 +9474,7 @@ nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
[NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
[NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
[NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
[NL80211_ATTR_CQM_RSSI_LEVEL] = { .type = NLA_S32 },
};
static int nl80211_set_cqm_txe(struct genl_info *info,
@ -13959,11 +13960,11 @@ static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
void cfg80211_cqm_rssi_notify(struct net_device *dev,
enum nl80211_cqm_rssi_threshold_event rssi_event,
gfp_t gfp)
s32 rssi_level, gfp_t gfp)
{
struct sk_buff *msg;
trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
trace_cfg80211_cqm_rssi_notify(dev, rssi_event, rssi_level);
if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
@ -13977,6 +13978,10 @@ void cfg80211_cqm_rssi_notify(struct net_device *dev,
rssi_event))
goto nla_put_failure;
if (rssi_level && nla_put_s32(msg, NL80211_ATTR_CQM_RSSI_LEVEL,
rssi_level))
goto nla_put_failure;
cfg80211_send_cqm(msg, gfp);
return;

11
net/wireless/trace.h
View File

@ -2490,18 +2490,21 @@ TRACE_EVENT(cfg80211_mgmt_tx_status,
TRACE_EVENT(cfg80211_cqm_rssi_notify,
TP_PROTO(struct net_device *netdev,
enum nl80211_cqm_rssi_threshold_event rssi_event),
TP_ARGS(netdev, rssi_event),
enum nl80211_cqm_rssi_threshold_event rssi_event,
s32 rssi_level),
TP_ARGS(netdev, rssi_event, rssi_level),
TP_STRUCT__entry(
NETDEV_ENTRY
__field(enum nl80211_cqm_rssi_threshold_event, rssi_event)
__field(s32, rssi_level)
),
TP_fast_assign(
NETDEV_ASSIGN;
__entry->rssi_event = rssi_event;
__entry->rssi_level = rssi_level;
),
TP_printk(NETDEV_PR_FMT ", rssi event: %d",
NETDEV_PR_ARG, __entry->rssi_event)
TP_printk(NETDEV_PR_FMT ", rssi event: %d, level: %d",
NETDEV_PR_ARG, __entry->rssi_event, __entry->rssi_level)
);
TRACE_EVENT(cfg80211_reg_can_beacon,