2012-05-15 14:07:23

by Victor Goldenshtein

Subject: [PATCH] wlcore: set channels 12-14 as pactive for sched scan

Introduce “pactive” scan mode – which instructs the fw to
perform a passive scan until an activity/energy is detected
on these channels, once energy detected the channel becomes
active.

Signed-off-by: Victor Goldenshtein <[email protected]>
---
drivers/net/wireless/ti/wlcore/scan.c | 39 +++++++++++++++++++++++++++-----
drivers/net/wireless/ti/wlcore/scan.h | 8 +++++-
2 files changed, 39 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/ti/wlcore/scan.c b/drivers/net/wireless/ti/wlcore/scan.c
index ade21a0..97022f4 100644
--- a/drivers/net/wireless/ti/wlcore/scan.c
+++ b/drivers/net/wireless/ti/wlcore/scan.c
@@ -411,7 +411,8 @@ wl1271_scan_get_sched_scan_channels(struct wl1271 *wl,
struct cfg80211_sched_scan_request *req,
struct conn_scan_ch_params *channels,
u32 band, bool radar, bool passive,
- int start, int max_channels)
+ int start, int max_channels,
+ u8 *n_pactive_ch)
{
struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
int i, j;
@@ -479,6 +480,23 @@ wl1271_scan_get_sched_scan_channels(struct wl1271 *wl,
channels[j].tx_power_att = req->channels[i]->max_power;
channels[j].channel = req->channels[i]->hw_value;

+ if ((band == IEEE80211_BAND_2GHZ) &&
+ (channels[j].channel >= 12) &&
+ (channels[j].channel <= 14) &&
+ (flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
+ !force_passive) {
+ /* pactive channels treated as DFS */
+ channels[j].flags = SCAN_CHANNEL_FLAGS_DFS;
+
+ /*
+ * n_pactive_ch is counted down from the end of
+ * the passive channel list
+ */
+ (*n_pactive_ch)++;
+ wl1271_debug(DEBUG_SCAN, "n_pactive_ch = %d",
+ *n_pactive_ch);
+ }
+
j++;
}
}
@@ -491,38 +509,47 @@ wl1271_scan_sched_scan_channels(struct wl1271 *wl,
struct cfg80211_sched_scan_request *req,
struct wl1271_cmd_sched_scan_config *cfg)
{
+ u8 n_pactive_ch = 0;
+
cfg->passive[0] =
wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_2,
IEEE80211_BAND_2GHZ,
false, true, 0,
- MAX_CHANNELS_2GHZ);
+ MAX_CHANNELS_2GHZ,
+ &n_pactive_ch);
cfg->active[0] =
wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_2,
IEEE80211_BAND_2GHZ,
false, false,
cfg->passive[0],
- MAX_CHANNELS_2GHZ);
+ MAX_CHANNELS_2GHZ,
+ &n_pactive_ch);
cfg->passive[1] =
wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_5,
IEEE80211_BAND_5GHZ,
false, true, 0,
- MAX_CHANNELS_5GHZ);
+ MAX_CHANNELS_5GHZ,
+ &n_pactive_ch);
cfg->dfs =
wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_5,
IEEE80211_BAND_5GHZ,
true, true,
cfg->passive[1],
- MAX_CHANNELS_5GHZ);
+ MAX_CHANNELS_5GHZ,
+ &n_pactive_ch);
cfg->active[1] =
wl1271_scan_get_sched_scan_channels(wl, req, cfg->channels_5,
IEEE80211_BAND_5GHZ,
false, false,
cfg->passive[1] + cfg->dfs,
- MAX_CHANNELS_5GHZ);
+ MAX_CHANNELS_5GHZ,
+ &n_pactive_ch);
/* 802.11j channels are not supported yet */
cfg->passive[2] = 0;
cfg->active[2] = 0;

+ cfg->n_pactive_ch = n_pactive_ch;
+
wl1271_debug(DEBUG_SCAN, " 2.4GHz: active %d passive %d",
cfg->active[0], cfg->passive[0]);
wl1271_debug(DEBUG_SCAN, " 5GHz: active %d passive %d",
diff --git a/drivers/net/wireless/ti/wlcore/scan.h b/drivers/net/wireless/ti/wlcore/scan.h
index 81ee36a..ea53223 100644
--- a/drivers/net/wireless/ti/wlcore/scan.h
+++ b/drivers/net/wireless/ti/wlcore/scan.h
@@ -142,7 +142,8 @@ enum {
SCAN_BSS_TYPE_ANY,
};

-#define SCAN_CHANNEL_FLAGS_DFS BIT(0)
+#define SCAN_CHANNEL_FLAGS_DFS BIT(0) /* channel is passive until an
+ activity is detected on it */
#define SCAN_CHANNEL_FLAGS_DFS_ENABLED BIT(1)

struct conn_scan_ch_params {
@@ -185,7 +186,10 @@ struct wl1271_cmd_sched_scan_config {

u8 dfs;

- u8 padding[3];
+ u8 n_pactive_ch; /* number of pactive (passive until fw detects energy)
+ channels in BG band */
+
+ u8 padding[2];

struct conn_scan_ch_params channels_2[MAX_CHANNELS_2GHZ];
struct conn_scan_ch_params channels_5[MAX_CHANNELS_5GHZ];
--
1.7.5.4

2012-06-06 17:06:28

by Luciano Coelho

Subject: Re: [PATCH] wlcore: set channels 12-14 as pactive for sched scan

On Tue, 2012-05-15 at 17:04 +0300, Victor Goldenshtein wrote:
> Introduce “pactive” scan mode – which instructs the fw to
> perform a passive scan until an activity/energy is detected
> on these channels, once energy detected the channel becomes
> active.
>
> Signed-off-by: Victor Goldenshtein <[email protected]>
> ---

Applied, thanks Victor!

--
Luca.