1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/net/wwan/iosm/iosm_ipc_trace.h b/drivers/net/wwan/iosm/iosm_ipc_trace.h
new file mode 100644
index 000000000000..5ebe7790585c
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_trace.h
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ *
+ * Copyright (C) 2020-2021 Intel Corporation.
+ */
+
+#ifndef IOSM_IPC_TRACE_H
+#define IOSM_IPC_TRACE_H
+
+#include <linux/debugfs.h>
+#include <linux/relay.h>
+
+#include "iosm_ipc_chnl_cfg.h"
+#include "iosm_ipc_imem_ops.h"
+
+/**
+ * enum trace_ctrl_mode - State of trace channel
+ * @TRACE_DISABLE:	mode for disable trace
+ * @TRACE_ENABLE:	mode for enable trace
+ */
+enum trace_ctrl_mode {
+	TRACE_DISABLE = 0,
+	TRACE_ENABLE,
+};
+
+/**
+ * struct iosm_trace - Struct for trace interface
+ * @ipc_rchan:		Pointer to relay channel
+ * @ctrl_file:		Pointer to trace control file
+ * @ipc_imem:		Imem instance
+ * @dev:		Pointer to device struct
+ * @channel:		Channel instance
+ * @chl_id:		Channel Indentifier
+ * @trc_mutex:		Mutex used for read and write mode
+ * @mode:		Mode for enable and disable trace
+ */
+
+struct iosm_trace {
+	struct rchan *ipc_rchan;
+	struct dentry *ctrl_file;
+	struct iosm_imem *ipc_imem;
+	struct device *dev;
+	struct ipc_mem_channel *channel;
+	enum ipc_channel_id chl_id;
+	struct mutex trc_mutex;	/* Mutex used for read and write mode */
+	enum trace_ctrl_mode mode;
+};
+
+#ifdef CONFIG_WWAN_DEBUGFS
+
+static inline bool ipc_is_trace_channel(struct iosm_imem *ipc_mem, u16 chl_id)
+{
+	return ipc_mem->trace && ipc_mem->trace->chl_id == chl_id;
+}
+
+struct iosm_trace *ipc_trace_init(struct iosm_imem *ipc_imem);
+void ipc_trace_deinit(struct iosm_trace *ipc_trace);
+void ipc_trace_port_rx(struct iosm_imem *ipc_imem, struct sk_buff *skb);
+
+#else
+
+static inline bool ipc_is_trace_channel(struct iosm_imem *ipc_mem, u16 chl_id)
+{
+	return false;
+}
+
+static inline void ipc_trace_port_rx(struct iosm_imem *ipc_imem,
+				     struct sk_buff *skb)
+{
+	dev_kfree_skb(skb);
+}
+
+#endif
+
+#endif