qcacmn: update the hang data for htc

whenever there is a wmi command timeout and recovery is triggered,
the htc credit history gives insight into whether host had the credits
to send the command to firmware. Add the credit history from the
htc module.

Change-Id: Iaa760981296862f8af496a23e3c24bc2fda0fb55
CRs-Fixed: 2651744

htc/htc_credit_history.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018,2020 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -20,6 +20,8 @@
 #include "htc_internal.h"
 #include "htc_credit_history.h"
 #include <qdf_lock.h>
+#include <qdf_hang_event_notifier.h>
+#include <qdf_notifier.h>
 
 struct HTC_CREDIT_HISTORY {
 	enum htc_credit_exchange_type type;
@@ -28,6 +30,11 @@ struct HTC_CREDIT_HISTORY {
 	uint32_t htc_tx_queue_depth;
 };
 
+struct htc_hang_data_fixed_param {
+	uint32_t tlv_header;
+	struct HTC_CREDIT_HISTORY credit_hist;
+} qdf_packed;
+
 static qdf_spinlock_t g_htc_credit_lock;
 static uint32_t g_htc_credit_history_idx;
 static uint32_t g_htc_credit_history_length;
@@ -135,3 +142,56 @@ void htc_print_credit_history(HTC_HANDLE htc, uint32_t count,
 
 	qdf_spin_unlock_bh(&g_htc_credit_lock);
 }
+
+#ifdef WLAN_HANG_EVENT
+void htc_log_hang_credit_history(struct notifier_block *block, void *data)
+{
+	qdf_notif_block *notif_block = qdf_container_of(block, qdf_notif_block,
+							notif_block);
+	struct qdf_notifer_data *htc_hang_data = data;
+	uint32_t count = 3, idx, total_len;
+	HTC_HANDLE htc;
+	struct htc_hang_data_fixed_param *cmd;
+	uint8_t *htc_buf_ptr;
+
+	htc = notif_block->priv_data;
+
+	if (!htc)
+		return;
+
+	if (!htc_hang_data)
+		return;
+
+	if (htc_hang_data->offset >= QDF_WLAN_MAX_HOST_OFFSET)
+		return;
+
+	total_len = sizeof(struct htc_hang_data_fixed_param);
+	qdf_spin_lock_bh(&g_htc_credit_lock);
+
+	if (count > HTC_CREDIT_HISTORY_MAX)
+		count = HTC_CREDIT_HISTORY_MAX;
+	if (count > g_htc_credit_history_length)
+		count = g_htc_credit_history_length;
+
+	idx = HTC_CREDIT_HISTORY_MAX + g_htc_credit_history_idx - count;
+	idx %= HTC_CREDIT_HISTORY_MAX;
+
+	qdf_spin_unlock_bh(&g_htc_credit_lock);
+
+	while (count) {
+		struct HTC_CREDIT_HISTORY *hist =
+						&htc_credit_history_buffer[idx];
+		htc_buf_ptr = htc_hang_data->hang_data + htc_hang_data->offset;
+		cmd = (struct htc_hang_data_fixed_param *)htc_buf_ptr;
+		QDF_HANG_EVT_SET_HDR(&cmd->tlv_header,
+				     HANG_EVT_TAG_HTC_CREDIT_HIST,
+		QDF_HANG_GET_STRUCT_TLVLEN(struct htc_hang_data_fixed_param));
+		qdf_mem_copy(&cmd->credit_hist, hist, sizeof(*hist));
+		--count;
+		++idx;
+		if (idx >= HTC_CREDIT_HISTORY_MAX)
+			idx = 0;
+		htc_hang_data->offset += total_len;
+	}
+}
+#endif