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mac80211: add support for HW scheduled scan

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Implement support for HW scheduled scan.  The mac80211 code doesn't perform
scheduled scans itself, but calls the driver to start and stop scheduled
scans.

This patch also creates a trace event class to be used by drv_hw_scan
and the new drv_sched_scan_start and drv_sched_stop functions, in
order to avoid duplicate code.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luciano Coelho
2011-05-11 17:09:36 +03:00
committed by John W. Linville
parent 807f8a8c30
commit 79f460ca49
8 changed files with 292 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

99
net/mac80211/scan.c
View File

@@ -15,6 +15,7 @@
#include <linux/if_arp.h>
#include <linux/rtnetlink.h>
#include <linux/pm_qos_params.h>
#include <linux/slab.h>
#include <net/sch_generic.h>
#include <linux/slab.h>
#include <net/mac80211.h>
@@ -850,3 +851,101 @@ void ieee80211_scan_cancel(struct ieee80211_local *local)
}
mutex_unlock(&local->mtx);
}
int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
struct cfg80211_sched_scan_request *req)
{
struct ieee80211_local *local = sdata->local;
int ret, i;
mutex_lock(&sdata->local->mtx);
if (local->sched_scanning) {
ret = -EBUSY;
goto out;
}
if (!local->ops->sched_scan_start) {
ret = -ENOTSUPP;
goto out;
}
for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
local->sched_scan_ies.ie[i] = kzalloc(2 +
IEEE80211_MAX_SSID_LEN +
local->scan_ies_len,
GFP_KERNEL);
if (!local->sched_scan_ies.ie[i]) {
ret = -ENOMEM;
goto out_free;
}
local->sched_scan_ies.len[i] =
ieee80211_build_preq_ies(local,
local->sched_scan_ies.ie[i],
req->ie, req->ie_len, i,
(u32) -1, 0);
}
ret = drv_sched_scan_start(local, sdata, req,
&local->sched_scan_ies);
if (ret == 0) {
local->sched_scanning = true;
goto out;
}
out_free:
while (i > 0)
kfree(local->sched_scan_ies.ie[--i]);
out:
mutex_unlock(&sdata->local->mtx);
return ret;
}
int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata,
bool driver_initiated)
{
struct ieee80211_local *local = sdata->local;
int ret = 0, i;
mutex_lock(&sdata->local->mtx);
if (!local->ops->sched_scan_stop) {
ret = -ENOTSUPP;
goto out;
}
if (local->sched_scanning) {
for (i = 0; i < IEEE80211_NUM_BANDS; i++)
kfree(local->sched_scan_ies.ie[i]);
if (!driver_initiated)
drv_sched_scan_stop(local, sdata);
local->sched_scanning = false;
}
out:
mutex_unlock(&sdata->local->mtx);
return ret;
}
void ieee80211_sched_scan_results(struct ieee80211_hw *hw)
{
struct ieee80211_local *local = hw_to_local(hw);
trace_api_sched_scan_results(local);
cfg80211_sched_scan_results(hw->wiphy);
}
EXPORT_SYMBOL(ieee80211_sched_scan_results);
void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw)
{
struct ieee80211_local *local = hw_to_local(hw);
trace_api_sched_scan_stopped(local);
cfg80211_sched_scan_stopped(hw->wiphy);
}
EXPORT_SYMBOL(ieee80211_sched_scan_stopped);