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nl80211: advertise maximum remain-on-channel duration 

With the upcoming hardware offload implementation,
some devices will have a different maximum duration
for the remain-on-channel command. Advertise the
maximum duration in mac80211, and make mac80211 set
it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2010-12-14 17:54:28 +01:00 committed by John W. Linville
parent 14a085e770
commit a293911d4f
4 changed files with 18 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/linux/nl80211.h
View File

@ -773,6 +773,9 @@ enum nl80211_commands {
* cache, a wiphy attribute.
*
* @NL80211_ATTR_DURATION: Duration of an operation in milliseconds, u32.
* @NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION: Device attribute that
* specifies the maximum duration that can be requested with the
* remain-on-channel operation, in milliseconds, u32.
*
* @NL80211_ATTR_COOKIE: Generic 64-bit cookie to identify objects.
*
@ -1035,6 +1038,8 @@ enum nl80211_attrs {
NL80211_ATTR_KEY_DEFAULT_TYPES,
NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,

5
include/net/cfg80211.h
View File

@ -1474,6 +1474,9 @@ struct ieee80211_txrx_stypes {
*
* @available_antennas: bitmap of antennas which are available to configure.
* antenna configuration commands will be rejected unless this is set.
*
* @max_remain_on_channel_duration: Maximum time a remain-on-channel operation
* may request, if implemented.
*/
struct wiphy {
/* assign these fields before you register the wiphy */
@ -1511,6 +1514,8 @@ struct wiphy {
char fw_version[ETHTOOL_BUSINFO_LEN];
u32 hw_version;
u16 max_remain_on_channel_duration;
u8 max_num_pmkids;
u32 available_antennas;

2
net/mac80211/main.c
View File

@ -745,6 +745,8 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
}
}
local->hw.wiphy->max_remain_on_channel_duration = 5000;
result = wiphy_register(local->hw.wiphy);
if (result < 0)
goto fail_wiphy_register;

7
net/wireless/nl80211.c
View File

@ -755,6 +755,10 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
nla_nest_end(msg, nl_cmds);
if (dev->ops->remain_on_channel)
NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
dev->wiphy.max_remain_on_channel_duration);
/* for now at least assume all drivers have it */
if (dev->ops->mgmt_tx)
NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
@ -4228,7 +4232,8 @@ static int nl80211_remain_on_channel(struct sk_buff *skb,
* We should be on that channel for at least one jiffie,
* and more than 5 seconds seems excessive.
*/
if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
if (!duration || !msecs_to_jiffies(duration) ||
duration > rdev->wiphy.max_remain_on_channel_duration)
return -EINVAL;
if (!rdev->ops->remain_on_channel)