qcacmn: Add support to register hif recovery notifier

Add support to register hif recovery notifier to log
hang event data.

Change-Id: I7e7ce2bacc88f00e68c2c347c3a578f377f8214f
CRs-Fixed: 2649147

hif/inc/hif.h

@@ -1356,17 +1356,17 @@ void hif_srng_init_phase(struct hif_opaque_softc *hif_ctx,
 #ifdef HIF_CE_LOG_INFO
 /**
  * hif_log_ce_info() - API to log ce info
- * @hif_ctx: hif opaque handle
+ * @scn: hif handle
  * @data: hang event data buffer
  * @offset: offset at which data needs to be written
  *
  * Return:  None
  */
-void hif_log_ce_info(struct hif_opaque_softc *hif_ctx, uint8_t *data,
+void hif_log_ce_info(struct hif_softc *scn, uint8_t *data,
 		     unsigned int *offset);
 #else
 static inline
-void hif_log_ce_info(struct hif_opaque_softc *hif_ctx, uint8_t *data,
+void hif_log_ce_info(struct hif_softc *scn, uint8_t *data,
 		     unsigned int *offset)
 {
 }

hif/src/ce/ce_main.c

@@ -4219,10 +4219,9 @@ int ce_get_index_info(struct hif_softc *scn, void *ce_state,
 	return hif_state->ce_services->ce_get_index_info(scn, ce_state, info);
 }
 
-void hif_log_ce_info(struct hif_opaque_softc *hif_ctx, uint8_t *data,
+void hif_log_ce_info(struct hif_softc *scn, uint8_t *data,
 		     unsigned int *offset)
 {
-	struct hif_softc *scn = HIF_GET_SOFTC(hif_ctx);
 	struct hang_event_info info = {0};
 	static uint32_t tracked_ce = BIT(CE_ID_1) | BIT(CE_ID_2) |
 		BIT(CE_ID_3) | BIT(CE_ID_4) | BIT(CE_ID_9) | BIT(CE_ID_10);

hif/src/hif_main.c

@@ -46,6 +46,10 @@
 #include "hif_napi.h"
 #include "hif_unit_test_suspend_i.h"
 #include "qdf_module.h"
+#ifdef HIF_CE_LOG_INFO
+#include <qdf_notifier.h>
+#include <qdf_hang_event_notifier.h>
+#endif
 
 void hif_dump(struct hif_opaque_softc *hif_ctx, uint8_t cmd_id, bool start)
 {
@@ -429,6 +433,87 @@ void hif_get_cfg_from_psoc(struct hif_softc *scn,
 }
 #endif /* WLAN_CE_INTERRUPT_THRESHOLD_CONFIG */
 
+#ifdef HIF_CE_LOG_INFO
+/**
+ * hif_recovery_notifier_cb - Recovery notifier callback to log
+ *  hang event data
+ * @block: notifier block
+ * @state: state
+ * @data: notifier data
+ *
+ * Return: status
+ */
+static
+int hif_recovery_notifier_cb(struct notifier_block *block, unsigned long state,
+			     void *data)
+{
+	struct qdf_notifer_data *notif_data = data;
+	qdf_notif_block *notif_block;
+	struct hif_softc *hif_handle;
+
+	if (!data || !block)
+		return -EINVAL;
+
+	notif_block = qdf_container_of(block, qdf_notif_block, notif_block);
+
+	hif_handle = notif_block->priv_data;
+	if (!hif_handle)
+		return -EINVAL;
+
+	hif_log_ce_info(hif_handle, notif_data->hang_data,
+			&notif_data->offset);
+
+	return 0;
+}
+
+/**
+ * hif_register_recovery_notifier - Register hif recovery notifier
+ * @hif_handle: hif handle
+ *
+ * Return: status
+ */
+static
+QDF_STATUS hif_register_recovery_notifier(struct hif_softc *hif_handle)
+{
+	qdf_notif_block *hif_notifier;
+
+	if (!hif_handle)
+		return QDF_STATUS_E_FAILURE;
+
+	hif_notifier = &hif_handle->hif_recovery_notifier;
+
+	hif_notifier->notif_block.notifier_call = hif_recovery_notifier_cb;
+	hif_notifier->priv_data = hif_handle;
+	return qdf_hang_event_register_notifier(hif_notifier);
+}
+
+/**
+ * hif_unregister_recovery_notifier - Un-register hif recovery notifier
+ * @hif_handle: hif handle
+ *
+ * Return: status
+ */
+static
+QDF_STATUS hif_unregister_recovery_notifier(struct hif_softc *hif_handle)
+{
+	qdf_notif_block *hif_notifier = &hif_handle->hif_recovery_notifier;
+
+	return qdf_hang_event_unregister_notifier(hif_notifier);
+}
+#else
+static inline
+QDF_STATUS hif_register_recovery_notifier(struct hif_softc *hif_handle)
+{
+	return QDF_STATUS_SUCCESS;
+}
+
+static inline
+QDF_STATUS hif_unregister_recovery_notifier(struct hif_softc *hif_handle)
+{
+	return QDF_STATUS_SUCCESS;
+}
+#endif
+
 struct hif_opaque_softc *hif_open(qdf_device_t qdf_ctx,
 				  uint32_t mode,
 				  enum qdf_bus_type bus_type,
@@ -610,6 +695,7 @@ QDF_STATUS hif_enable(struct hif_opaque_softc *hif_ctx, struct device *dev,
 	}
 
 	hif_ut_suspend_init(scn);
+	hif_register_recovery_notifier(scn);
 
 	/*
 	 * Flag to avoid potential unallocated memory access from MSI
@@ -639,6 +725,8 @@ void hif_disable(struct hif_opaque_softc *hif_ctx, enum hif_disable_type type)
 	if (!scn)
 		return;
 
+	hif_unregister_recovery_notifier(scn);
+
 	hif_nointrs(scn);
 	if (scn->hif_init_done == false)
 		hif_shutdown_device(hif_ctx);

hif/src/hif_main.h

@@ -39,6 +39,9 @@
 #include "hif.h"
 #include "multibus.h"
 #include "hif_unit_test_suspend_i.h"
+#ifdef HIF_CE_LOG_INFO
+#include "qdf_notifier.h"
+#endif
 
 #define HIF_MIN_SLEEP_INACTIVITY_TIME_MS     50
 #define HIF_SLEEP_INACTIVITY_TIMER_PERIOD_MS 60
@@ -239,6 +242,9 @@ struct hif_softc {
 	qdf_shared_mem_t *ipa_ce_ring;
 #endif
 	struct hif_cfg ini_cfg;
+#ifdef HIF_CE_LOG_INFO
+	qdf_notif_block hif_recovery_notifier;
+#endif
 };
 
 static inline