From 75394d6c8f75fc0423318d4df37f83ebb4e263a3 Mon Sep 17 00:00:00 2001
From: "Padma, Santhosh Kumar" <skpadma@codeaurora.org>
Date: Thu, 11 Aug 2016 16:33:03 +0530
Subject: [PATCH] qcacmn: Dump driver information

qcacld-2.0 to qcacmn propagation

Dump state information of HDD, SME, PE and WMA layers
into a buffer. Contents of this buffer will be copied
into user space using proc entry /proc/debugdriver/
driverdump.

Change-Id: Ifbb102e440d7df20defa1a397964cb9b55082bf9
CRs-Fixed: 955357
---
 qdf/inc/qdf_trace.h         |  6 ++++
 qdf/linux/src/i_qdf_trace.h |  1 +
 qdf/linux/src/qdf_trace.c   | 65 +++++++++++++++++++++++++++++++++++++
 3 files changed, 72 insertions(+)

diff --git a/qdf/inc/qdf_trace.h b/qdf/inc/qdf_trace.h
index b80cfa9b4d8f..f113e558c29a 100644
--- a/qdf/inc/qdf_trace.h
+++ b/qdf/inc/qdf_trace.h
@@ -364,6 +364,12 @@ void qdf_trace_set_level(QDF_MODULE_ID module, QDF_TRACE_LEVEL level);
 bool qdf_trace_get_level(QDF_MODULE_ID module, QDF_TRACE_LEVEL level);
 
 typedef void (*tp_qdf_trace_cb)(void *p_mac, tp_qdf_trace_record, uint16_t);
+typedef void (*tp_qdf_state_info_cb) (char **buf, uint16_t *size);
+void qdf_register_debugcb_init(void);
+void qdf_register_debug_callback(QDF_MODULE_ID module_id,
+					tp_qdf_state_info_cb qdf_state_infocb);
+QDF_STATUS qdf_state_info_dump_all(char *buf, uint16_t size,
+			uint16_t *driver_dump_size);
 void qdf_trace(uint8_t module, uint8_t code, uint16_t session, uint32_t data);
 void qdf_trace_register(QDF_MODULE_ID, tp_qdf_trace_cb);
 QDF_STATUS qdf_trace_spin_lock_init(void);
diff --git a/qdf/linux/src/i_qdf_trace.h b/qdf/linux/src/i_qdf_trace.h
index dd3709b30f41..6cd100cbe060 100644
--- a/qdf/linux/src/i_qdf_trace.h
+++ b/qdf/linux/src/i_qdf_trace.h
@@ -75,6 +75,7 @@
 #endif /* CONFIG_MCL */
 
 #define QDF_ENABLE_TRACING
+#define qdf_scnprintf scnprintf
 
 #ifdef QDF_ENABLE_TRACING
 
diff --git a/qdf/linux/src/qdf_trace.c b/qdf/linux/src/qdf_trace.c
index e1d2bbefd2c9..4da323b541b3 100644
--- a/qdf/linux/src/qdf_trace.c
+++ b/qdf/linux/src/qdf_trace.c
@@ -101,6 +101,7 @@ static t_qdf_trace_data g_qdf_trace_data;
  */
 static tp_qdf_trace_cb qdf_trace_cb_table[QDF_MODULE_ID_MAX];
 static tp_qdf_trace_cb qdf_trace_restore_cb_table[QDF_MODULE_ID_MAX];
+static tp_qdf_state_info_cb qdf_state_info_table[QDF_MODULE_ID_MAX];
 
 #ifdef FEATURE_DP_TRACE
 /* Static and Global variables */
@@ -715,6 +716,70 @@ void qdf_trace_dump_all(void *p_mac, uint8_t code, uint8_t session,
 }
 EXPORT_SYMBOL(qdf_trace_dump_all);
 
+/**
+ * qdf_register_debugcb_init() - initializes debug callbacks
+ * to NULL
+ *
+ * Return: None
+ */
+void qdf_register_debugcb_init(void)
+{
+	uint8_t i;
+
+	for (i = 0; i < QDF_MODULE_ID_MAX; i++)
+		qdf_state_info_table[i] = NULL;
+}
+EXPORT_SYMBOL(qdf_register_debugcb_init);
+
+/**
+ * qdf_register_debug_callback() - stores callback handlers to print
+ * state information
+ * @module_id: module id of layer
+ * @qdf_state_infocb: callback to be registered
+ *
+ * This function is used to store callback handlers to print
+ * state information
+ *
+ * Return: None
+ */
+void qdf_register_debug_callback(QDF_MODULE_ID module_id,
+					tp_qdf_state_info_cb qdf_state_infocb)
+{
+	qdf_state_info_table[module_id] = qdf_state_infocb;
+}
+EXPORT_SYMBOL(qdf_register_debug_callback);
+
+/**
+ * qdf_state_info_dump_all() - it invokes callback of layer which registered
+ * its callback to print its state information.
+ * @buf:  buffer pointer to be passed
+ * @size:  size of buffer to be filled
+ * @driver_dump_size: actual size of buffer used
+ *
+ * Return: QDF_STATUS_SUCCESS on success
+ */
+QDF_STATUS qdf_state_info_dump_all(char *buf, uint16_t size,
+			uint16_t *driver_dump_size)
+{
+	uint8_t module, ret = QDF_STATUS_SUCCESS;
+	uint16_t buf_len = size;
+	char *buf_ptr = buf;
+
+	for (module = 0; module < QDF_MODULE_ID_MAX; module++) {
+		if (NULL != qdf_state_info_table[module]) {
+			qdf_state_info_table[module](&buf_ptr, &buf_len);
+			if (!buf_len) {
+				ret = QDF_STATUS_E_NOMEM;
+				break;
+			}
+		}
+	}
+
+	*driver_dump_size = size - buf_len;
+	return ret;
+}
+EXPORT_SYMBOL(qdf_state_info_dump_all);
+
 #ifdef FEATURE_DP_TRACE
 /**
  * qdf_dp_trace_init() - enables the DP trace