mwifiex: add set_cqm_rssi_config handler support

In this handler LOW_RSSI and HIGH_RSSI events are subscribed
to FW using provided threshold value so that FW will monitor
connection quality and trigger any of these events.

Driver will notify cfg80211 about connection quality based on
inputs from FW and provided hysteresis.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/sta_cmdresp.c b/drivers/net/wireless/mwifiex/sta_cmdresp.c
index cd90b6f..3aa5424 100644
--- a/drivers/net/wireless/mwifiex/sta_cmdresp.c
+++ b/drivers/net/wireless/mwifiex/sta_cmdresp.c
@@ -123,6 +123,7 @@ static int mwifiex_ret_802_11_rssi_info(struct mwifiex_private *priv,
 {
 	struct host_cmd_ds_802_11_rssi_info_rsp *rssi_info_rsp =
 						&resp->params.rssi_info_rsp;
+	struct mwifiex_ds_misc_subsc_evt subsc_evt;
 
 	priv->data_rssi_last = le16_to_cpu(rssi_info_rsp->data_rssi_last);
 	priv->data_nf_last = le16_to_cpu(rssi_info_rsp->data_nf_last);
@@ -136,6 +137,30 @@ static int mwifiex_ret_802_11_rssi_info(struct mwifiex_private *priv,
 	priv->bcn_rssi_avg = le16_to_cpu(rssi_info_rsp->bcn_rssi_avg);
 	priv->bcn_nf_avg = le16_to_cpu(rssi_info_rsp->bcn_nf_avg);
 
+	if (priv->subsc_evt_rssi_state == EVENT_HANDLED)
+		return 0;
+
+	/* Resubscribe low and high rssi events with new thresholds */
+	memset(&subsc_evt, 0x00, sizeof(struct mwifiex_ds_misc_subsc_evt));
+	subsc_evt.events = BITMASK_BCN_RSSI_LOW | BITMASK_BCN_RSSI_HIGH;
+	subsc_evt.action = HostCmd_ACT_BITWISE_SET;
+	if (priv->subsc_evt_rssi_state == RSSI_LOW_RECVD) {
+		subsc_evt.bcn_l_rssi_cfg.abs_value = abs(priv->bcn_rssi_avg -
+				priv->cqm_rssi_hyst);
+		subsc_evt.bcn_h_rssi_cfg.abs_value = abs(priv->cqm_rssi_thold);
+	} else if (priv->subsc_evt_rssi_state == RSSI_HIGH_RECVD) {
+		subsc_evt.bcn_l_rssi_cfg.abs_value = abs(priv->cqm_rssi_thold);
+		subsc_evt.bcn_h_rssi_cfg.abs_value = abs(priv->bcn_rssi_avg +
+				priv->cqm_rssi_hyst);
+	}
+	subsc_evt.bcn_l_rssi_cfg.evt_freq = 1;
+	subsc_evt.bcn_h_rssi_cfg.evt_freq = 1;
+
+	priv->subsc_evt_rssi_state = EVENT_HANDLED;
+
+	mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SUBSCRIBE_EVENT,
+			       0, 0, &subsc_evt);
+
 	return 0;
 }
 
@@ -755,6 +780,28 @@ static int mwifiex_ret_ibss_coalescing_status(struct mwifiex_private *priv,
 }
 
 /*
+ * This function handles the command response for subscribe event command.
+ */
+static int mwifiex_ret_subsc_evt(struct mwifiex_private *priv,
+				 struct host_cmd_ds_command *resp,
+				 struct mwifiex_ds_misc_subsc_evt *sub_event)
+{
+	struct host_cmd_ds_802_11_subsc_evt *cmd_sub_event =
+		(struct host_cmd_ds_802_11_subsc_evt *)&resp->params.subsc_evt;
+
+	/* For every subscribe event command (Get/Set/Clear), FW reports the
+	 * current set of subscribed events*/
+	dev_dbg(priv->adapter->dev, "Bitmap of currently subscribed events: %16x\n",
+		le16_to_cpu(cmd_sub_event->events));
+
+	/*Return the subscribed event info for a Get request*/
+	if (sub_event)
+		sub_event->events = le16_to_cpu(cmd_sub_event->events);
+
+	return 0;
+}
+
+/*
  * This function handles the command responses.
  *
  * This is a generic function, which calls command specific
@@ -894,6 +941,9 @@ int mwifiex_process_sta_cmdresp(struct mwifiex_private *priv, u16 cmdresp_no,
 		break;
 	case HostCmd_CMD_PCIE_DESC_DETAILS:
 		break;
+	case HostCmd_CMD_802_11_SUBSCRIBE_EVENT:
+		ret = mwifiex_ret_subsc_evt(priv, resp, data_buf);
+		break;
 	default:
 		dev_err(adapter->dev, "CMD_RESP: unknown cmd response %#x\n",
 			resp->command);