wil6210: add support for discovery mode during scan

Add support for discovery mode during scan. When discovery mode
is active, station transmits special beacons while scanning.
This can optimize the scan mainly when there is only one AP/PCP
around.
Discovery mode is implicitly used by firmware during P2P search.
Since there is currently no use case where user space has a
reason to directly control discovery mode, we expose it only
through a debugfs flag.
Also fix name confusion in the wmi_scan_type enumeration.
The type previously called WMI_LONG_SCAN is actually
WMI_ACTIVE_SCAN.

Change-Id: I05b99ec66b0da41697f41c547aab0b0497dd9be6
Signed-off-by: Lior David <qca_liord@qca.qualcomm.com>
Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Git-commit: 74997a53d257e327699e359b78b3ecfd33f80cab
Git-repo: https://github.com/kvalo/ath.git
CRs-Fixed: 982931
Signed-off-by: Maya Erez <merez@codeaurora.org>

4 files changed, 17 insertions, 3 deletions

diff --git a/drivers/net/wireless/ath/wil6210/cfg80211.c b/drivers/net/wireless/ath/wil6210/cfg80211.c
index 8bd58cedebaf..afd8938c9496 100644
--- a/drivers/net/wireless/ath/wil6210/cfg80211.c
+++ b/drivers/net/wireless/ath/wil6210/cfg80211.c
@@ -319,6 +319,7 @@ static int wil_cfg80211_scan(struct wiphy *wiphy,
 	mod_timer(&wil->scan_timer, jiffies + WIL6210_SCAN_TO);
 
 	memset(&cmd, 0, sizeof(cmd));
+	cmd.cmd.scan_type = WMI_ACTIVE_SCAN;
 	cmd.cmd.num_channels = 0;
 	n = min(request->n_channels, 4U);
 	for (i = 0; i < n; i++) {
@@ -346,6 +347,11 @@ static int wil_cfg80211_scan(struct wiphy *wiphy,
 	if (rc)
 		goto out;
 
+	if (wil->discovery_mode && cmd.cmd.scan_type == WMI_ACTIVE_SCAN) {
+		cmd.cmd.discovery_mode = 1;
+		wil_dbg_misc(wil, "active scan with discovery_mode=1\n");
+	}
+
 	rc = wmi_send(wil, WMI_START_SCAN_CMDID, &cmd, sizeof(cmd.cmd) +
 			cmd.cmd.num_channels * sizeof(cmd.cmd.channel_list[0]));
 
diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c
index 32efa584d6ac..10fe92b0990b 100644
--- a/drivers/net/wireless/ath/wil6210/debugfs.c
+++ b/drivers/net/wireless/ath/wil6210/debugfs.c
@@ -37,6 +37,7 @@ enum dbg_off_type {
 	doff_x32 = 1,
 	doff_ulong = 2,
 	doff_io32 = 3,
+	doff_u8 = 4
 };
 
 /* offset to "wil" */
@@ -346,6 +347,10 @@ static void wil6210_debugfs_init_offset(struct wil6210_priv *wil,
 							 tbl[i].mode, dbg,
 							 base + tbl[i].off);
 			break;
+		case doff_u8:
+			f = debugfs_create_u8(tbl[i].name, tbl[i].mode, dbg,
+					      base + tbl[i].off);
+			break;
 		default:
 			f = ERR_PTR(-EINVAL);
 		}
@@ -1528,6 +1533,7 @@ static const struct dbg_off dbg_wil_off[] = {
 	WIL_FIELD(hw_version,	S_IRUGO,		doff_x32),
 	WIL_FIELD(recovery_count, S_IRUGO,		doff_u32),
 	WIL_FIELD(ap_isolate,	S_IRUGO,		doff_u32),
+	WIL_FIELD(discovery_mode, S_IRUGO | S_IWUSR,	doff_u8),
 	{},
 };
 
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index ebae15e0ff97..3a3a88fe1dae 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -618,6 +618,7 @@ struct wil6210_priv {
 	/* debugfs */
 	struct dentry *debug;
 	struct debugfs_blob_wrapper blobs[ARRAY_SIZE(fw_mapping)];
+	u8 discovery_mode;
 
 	void *platform_handle;
 	struct wil_platform_ops platform_ops;
diff --git a/drivers/net/wireless/ath/wil6210/wmi.h b/drivers/net/wireless/ath/wil6210/wmi.h
index 6e90e78f1554..430a4c09db59 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.h
+++ b/drivers/net/wireless/ath/wil6210/wmi.h
@@ -286,16 +286,17 @@ struct wmi_delete_cipher_key_cmd {
  * - WMI_SCAN_COMPLETE_EVENTID
  */
 enum wmi_scan_type {
-	WMI_LONG_SCAN		= 0,
+	WMI_ACTIVE_SCAN		= 0,
 	WMI_SHORT_SCAN		= 1,
 	WMI_PBC_SCAN		= 2,
 	WMI_DIRECT_SCAN		= 3,
-	WMI_ACTIVE_SCAN		= 4,
+	WMI_LONG_SCAN		= 4,
 };
 
 struct wmi_start_scan_cmd {
 	u8 direct_scan_mac_addr[6];
-	u8 reserved[2];
+	u8 discovery_mode;
+	u8 reserved;
 	__le32 home_dwell_time;	/* Max duration in the home channel(ms) */
 	__le32 force_scan_interval;	/* Time interval between scans (ms)*/
 	u8 scan_type;		/* wmi_scan_type */