qcacld-3.0: Add SAR unsolicited timer

Add SAR unsolicited timer to the driver. This timer starts
on every data tx (if not already running) and stops on
command QCA_NL80211_VENDOR_SUBCMD_SET_SAR_LIMITS.
If this timer expires, a vendor event
QCA_NL80211_VENDOR_SUBCMD_GET_SAR_LIMITS_EVENT is sent to the
user space to issue the QCA_NL80211_VENDOR_SUBCMD_SET_SAR_LIMITS
command.

Change-Id: Ic30e5ac606d2b6b0cbc9209174adcd5213eac08e
CRs-Fixed: 2615510

core/hdd/inc/wlan_hdd_main.h

@@ -1885,7 +1885,9 @@ struct hdd_context {
 	struct sar_limit_cmd_params *sar_cmd_params;
 #ifdef SAR_SAFETY_FEATURE
 	qdf_mc_timer_t sar_safety_timer;
+	qdf_mc_timer_t sar_safety_unsolicited_timer;
 #endif
+
 	qdf_time_t runtime_resume_start_time_stamp;
 	qdf_time_t runtime_suspend_done_time_stamp;
 #if defined(CLD_PM_QOS) && \

core/hdd/src/wlan_hdd_cfg80211.c

@@ -1580,6 +1580,11 @@ static const struct nl80211_vendor_cmd_info wlan_hdd_cfg80211_vendor_events[] =
 		.vendor_id = QCA_NL80211_VENDOR_ID,
 		.subcmd = QCA_NL80211_VENDOR_SUBCMD_OEM_DATA,
 	},
+	[QCA_NL80211_VENDOR_SUBCMD_REQUEST_SAR_LIMITS_INDEX] = {
+		.vendor_id = QCA_NL80211_VENDOR_ID,
+		.subcmd = QCA_NL80211_VENDOR_SUBCMD_GET_SAR_LIMITS_EVENT,
+	},
+
 };
 
 /**

core/hdd/src/wlan_hdd_sar_limits.c

@@ -384,6 +384,40 @@ config_sar_failed:
 	}
 }
 
+static void hdd_send_sar_unsolicited_event(struct hdd_context *hdd_ctx)
+{
+	struct sk_buff *vendor_event;
+	uint32_t len;
+
+	if (!hdd_ctx) {
+		hdd_err_rl("hdd context is null");
+		return;
+	}
+
+	len = NLMSG_HDRLEN;
+	vendor_event =
+		cfg80211_vendor_event_alloc(
+			hdd_ctx->wiphy, NULL, len,
+			QCA_NL80211_VENDOR_SUBCMD_REQUEST_SAR_LIMITS_INDEX,
+			GFP_KERNEL);
+
+	if (!vendor_event) {
+		hdd_err("cfg80211_vendor_event_alloc failed");
+		return;
+	}
+
+	cfg80211_vendor_event(vendor_event, GFP_KERNEL);
+}
+
+static void hdd_sar_unsolicited_timer_cb(void *user_data)
+{
+	struct hdd_context *hdd_ctx = (struct hdd_context *)user_data;
+
+	hdd_nofl_debug("Sar unsolicited timer expired");
+
+	hdd_send_sar_unsolicited_event(hdd_ctx);
+}
+
 static void hdd_sar_safety_timer_cb(void *user_data)
 {
 	struct hdd_context *hdd_ctx = (struct hdd_context *)user_data;
@@ -392,6 +426,19 @@ static void hdd_sar_safety_timer_cb(void *user_data)
 	hdd_configure_sar_index(hdd_ctx, hdd_ctx->config->sar_safety_index);
 }
 
+void wlan_hdd_sar_unsolicited_timer_start(struct hdd_context *hdd_ctx)
+{
+	if (!hdd_ctx->config->enable_sar_safety)
+		return;
+
+	if (QDF_TIMER_STATE_RUNNING !=
+		qdf_mc_timer_get_current_state(
+				&hdd_ctx->sar_safety_unsolicited_timer))
+		qdf_mc_timer_start(
+			&hdd_ctx->sar_safety_unsolicited_timer,
+			hdd_ctx->config->sar_safety_unsolicited_timeout);
+}
+
 void wlan_hdd_sar_timers_reset(struct hdd_context *hdd_ctx)
 {
 	if (!hdd_ctx->config->enable_sar_safety)
@@ -406,6 +453,11 @@ void wlan_hdd_sar_timers_reset(struct hdd_context *hdd_ctx)
 
 	qdf_mc_timer_start(&hdd_ctx->sar_safety_timer,
 			   hdd_ctx->config->sar_safety_timeout);
+
+	if (QDF_TIMER_STATE_RUNNING ==
+		qdf_mc_timer_get_current_state(
+				&hdd_ctx->sar_safety_unsolicited_timer))
+		qdf_mc_timer_stop(&hdd_ctx->sar_safety_unsolicited_timer);
 }
 
 void wlan_hdd_sar_timers_init(struct hdd_context *hdd_ctx)
@@ -415,6 +467,10 @@ void wlan_hdd_sar_timers_init(struct hdd_context *hdd_ctx)
 
 	qdf_mc_timer_init(&hdd_ctx->sar_safety_timer, QDF_TIMER_TYPE_SW,
 			  hdd_sar_safety_timer_cb, hdd_ctx);
+
+	qdf_mc_timer_init(&hdd_ctx->sar_safety_unsolicited_timer,
+			  QDF_TIMER_TYPE_SW,
+			  hdd_sar_unsolicited_timer_cb, hdd_ctx);
 }
 
 void wlan_hdd_sar_timers_deinit(struct hdd_context *hdd_ctx)
@@ -427,6 +483,14 @@ void wlan_hdd_sar_timers_deinit(struct hdd_context *hdd_ctx)
 		qdf_mc_timer_stop(&hdd_ctx->sar_safety_timer);
 
 	qdf_mc_timer_destroy(&hdd_ctx->sar_safety_timer);
+
+	if (QDF_TIMER_STATE_RUNNING ==
+		qdf_mc_timer_get_current_state(
+				&hdd_ctx->sar_safety_unsolicited_timer))
+		qdf_mc_timer_stop(&hdd_ctx->sar_safety_unsolicited_timer);
+
+	qdf_mc_timer_destroy(&hdd_ctx->sar_safety_unsolicited_timer);
+
 }
 #endif
 

core/hdd/src/wlan_hdd_sar_limits.h

@@ -28,6 +28,16 @@
 #ifdef FEATURE_SAR_LIMITS
 
 #ifdef SAR_SAFETY_FEATURE
+/**
+ * wlan_hdd_sar_unsolicited_timer_start() - Start SAR unsolicited timer
+ * @hdd_ctx: Pointer to HDD context
+ *
+ * This function checks the state of the sar unsolicited timer, if the
+ * sar_unsolicited_timer is not runnig, it starts the timer.
+ *
+ * Return: None
+ */
+void wlan_hdd_sar_unsolicited_timer_start(struct hdd_context *hdd_ctx);
 
 /**
  * wlan_hdd_sar_safety_timer_reset() - Reset SAR sefety timer
@@ -72,6 +82,11 @@ void wlan_hdd_sar_timers_deinit(struct hdd_context *hdd_ctx);
 void hdd_configure_sar_index(struct hdd_context *hdd_ctx, uint32_t sar_index);
 
 #else
+static inline void wlan_hdd_sar_unsolicited_timer_start(
+						struct hdd_context *hdd_ctx)
+{
+}
+
 static inline void wlan_hdd_sar_timers_reset(struct hdd_context *hdd_ctx)
 {
 }

core/hdd/src/wlan_hdd_softap_tx_rx.c

@@ -46,6 +46,7 @@
 #include <wma_types.h>
 #include "wlan_hdd_sta_info.h"
 #include "ol_defines.h"
+#include <wlan_hdd_sar_limits.h>
 
 /* Preprocessor definitions and constants */
 #undef QCA_HDD_SAP_DUMP_SK_BUFF
@@ -606,6 +607,8 @@ static void __hdd_softap_hard_start_xmit(struct sk_buff *skb,
 	}
 	netif_trans_update(dev);
 
+	wlan_hdd_sar_unsolicited_timer_start(hdd_ctx);
+
 	return;
 
 drop_pkt_and_release_skb:

core/hdd/src/wlan_hdd_tx_rx.c

@@ -67,6 +67,7 @@
 #include "wlan_hdd_object_manager.h"
 #include "nan_public_structs.h"
 #include "nan_ucfg_api.h"
+#include <wlan_hdd_sar_limits.h>
 
 #if defined(QCA_LL_TX_FLOW_CONTROL_V2) || defined(QCA_LL_PDEV_TX_FLOW_CONTROL)
 /*
@@ -1143,6 +1144,8 @@ static void __hdd_hard_start_xmit(struct sk_buff *skb,
 
 	netif_trans_update(dev);
 
+	wlan_hdd_sar_unsolicited_timer_start(hdd_ctx);
+
 	return;
 
 drop_pkt_and_release_skb: