diff options
| author | Eliad Peller <eliad@wizery.com> | 2012-02-02 17:44:55 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-02-06 14:55:51 -0500 |
| commit | 885bd8eca6ac172e299750d99bd5c9fddbed89b9 (patch) | |
| tree | 7ce2265d4738f6ea1f40f13d86d96c150bef73cf | |
| parent | 3dc5e1751803e812806d7aa46150af92f91ef489 (diff) | |
| download | linux-885bd8eca6ac172e299750d99bd5c9fddbed89b9.tar.gz linux-885bd8eca6ac172e299750d99bd5c9fddbed89b9.tar.bz2 linux-885bd8eca6ac172e299750d99bd5c9fddbed89b9.zip | |
mac80211: support hw scan while idle
Currently, mac80211 goes to idle-off before starting a scan.
However, some devices that implement hw scan might not
need going idle-off in order to perform a hw scan, and
thus saving some energy and simplifying their state machine.
(Note that this is also the case for sched scan - it
currently doesn't make mac80211 go idle-off)
Add a new flag to indicate support for hw scan while idle.
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | include/net/mac80211.h | 5 | ||||
| -rw-r--r-- | net/mac80211/debugfs.c | 2 | ||||
| -rw-r--r-- | net/mac80211/iface.c | 3 | ||||
| -rw-r--r-- | net/mac80211/main.c | 3 |
4 files changed, 12 insertions, 1 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 922313f0b39b..cbff4f94a200 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1164,6 +1164,10 @@ enum sta_notify_cmd { * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session * setup strictly in HW. mac80211 should not attempt to do this in * software. + * + * @IEEE80211_HW_SCAN_WHILE_IDLE: The device can do hw scan while + * being idle (i.e. mac80211 doesn't have to go idle-off during the + * the scan). */ enum ieee80211_hw_flags { IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, @@ -1190,6 +1194,7 @@ enum ieee80211_hw_flags { IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, IEEE80211_HW_AP_LINK_PS = 1<<22, IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, + IEEE80211_HW_SCAN_WHILE_IDLE = 1<<24, }; /** diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c index affe64be9092..483e96ed95c1 100644 --- a/net/mac80211/debugfs.c +++ b/net/mac80211/debugfs.c @@ -263,6 +263,8 @@ static ssize_t hwflags_read(struct file *file, char __user *user_buf, sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n"); if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW) sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n"); + if (local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE) + sf += snprintf(buf + sf, mxln - sf, "SCAN_WHILE_IDLE\n"); rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); kfree(buf); diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 19f0818eba78..6b3cd65d1e07 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -1332,7 +1332,8 @@ u32 __ieee80211_recalc_idle(struct ieee80211_local *local) wk->sdata->vif.bss_conf.idle = false; } - if (local->scan_sdata) { + if (local->scan_sdata && + !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) { scanning = true; local->scan_sdata->vif.bss_conf.idle = false; } diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 362e89d6d467..831a5bd44fd0 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -697,6 +697,9 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) ) return -EINVAL; + if ((hw->flags & IEEE80211_HW_SCAN_WHILE_IDLE) && !local->ops->hw_scan) + return -EINVAL; + if (hw->max_report_rates == 0) hw->max_report_rates = hw->max_rates; |