[PATCH v7 08/14] ASoC: Intel: catpt: Event tracing

[Cezary Rojewski]

Define tracing macros for easy catpt debug. These cover all IPC message
types: requests, replies and notifications.

Signed-off-by: Cezary Rojewski <cezary.rojewski at intel.com>
---

Changes in v6:
- trace usage now part of this patch instead of being separated from it

Changes in v2:
- trace.h events for updating registers have been removed and usages
  replaced by dev_dbg (SRAMPGE/ LPCS)
- trace.h events for catpt_mbank and catpt_mregion have been removed

 sound/soc/intel/catpt/device.c |  3 ++
 sound/soc/intel/catpt/ipc.c    | 11 +++++
 sound/soc/intel/catpt/trace.h  | 83 ++++++++++++++++++++++++++++++++++
 3 files changed, 97 insertions(+)
 create mode 100644 sound/soc/intel/catpt/trace.h

diff --git a/sound/soc/intel/catpt/device.c b/sound/soc/intel/catpt/device.c
index e7dc2fb69ea8..c02d46e5bc81 100644
--- a/sound/soc/intel/catpt/device.c
+++ b/sound/soc/intel/catpt/device.c
@@ -25,6 +25,9 @@
 #include "core.h"
 #include "registers.h"
 
+#define CREATE_TRACE_POINTS
+#include "trace.h"
+
 static int __maybe_unused catpt_suspend(struct device *dev)
 {
 	struct catpt_dev *cdev = dev_get_drvdata(dev);
diff --git a/sound/soc/intel/catpt/ipc.c b/sound/soc/intel/catpt/ipc.c
index 9e4e33d99c03..473f43f6b792 100644
--- a/sound/soc/intel/catpt/ipc.c
+++ b/sound/soc/intel/catpt/ipc.c
@@ -9,6 +9,7 @@
 #include "core.h"
 #include "messages.h"
 #include "registers.h"
+#include "trace.h"
 
 #define CATPT_IPC_TIMEOUT_MSECS	300
 
@@ -56,6 +57,9 @@ static void catpt_dsp_send_tx(struct catpt_dev *cdev,
 {
 	u32 header = tx->header | CATPT_IPCC_BUSY;
 
+	trace_catpt_ipc_request(header);
+	trace_catpt_ipc_payload(tx->data, tx->size);
+
 	if (tx->size)
 		memcpy_toio(catpt_outbox_addr(cdev), tx->data, tx->size);
 	catpt_writel_shim(cdev, IPCC, header);
@@ -155,12 +159,14 @@ catpt_dsp_notify_stream(struct catpt_dev *cdev, union catpt_notify_msg msg)
 	switch (msg.notify_reason) {
 	case CATPT_NOTIFY_POSITION_CHANGED:
 		memcpy_fromio(&pos, catpt_inbox_addr(cdev), sizeof(pos));
+		trace_catpt_ipc_payload((u8 *)&pos, sizeof(pos));
 
 		catpt_stream_update_position(cdev, stream, &pos);
 		break;
 
 	case CATPT_NOTIFY_GLITCH_OCCURRED:
 		memcpy_fromio(&glitch, catpt_inbox_addr(cdev), sizeof(glitch));
+		trace_catpt_ipc_payload((u8 *)&glitch, sizeof(glitch));
 
 		dev_warn(cdev->dev, "glitch %d at pos: 0x%08llx, wp: 0x%08x\n",
 			 glitch.type, glitch.presentation_pos,
@@ -182,6 +188,7 @@ static void catpt_dsp_copy_rx(struct catpt_dev *cdev, u32 header)
 	if (ipc->rx.size && ipc->rx.rsp.status == CATPT_REPLY_SUCCESS) {
 		memcpy_fromio(ipc->rx.data, catpt_outbox_addr(cdev),
 			      ipc->rx.size);
+		trace_catpt_ipc_payload(ipc->rx.data, ipc->rx.size);
 	}
 }
 
@@ -196,6 +203,7 @@ static void catpt_dsp_process_response(struct catpt_dev *cdev, u32 header)
 		u32 off = msg.mailbox_address << 3;
 
 		memcpy_fromio(&config, cdev->lpe_ba + off, sizeof(config));
+		trace_catpt_ipc_payload((u8 *)&config, sizeof(config));
 
 		catpt_ipc_arm(ipc, &config);
 		complete(&cdev->fw_ready);
@@ -236,6 +244,7 @@ irqreturn_t catpt_dsp_irq_thread(int irq, void *dev_id)
 	u32 ipcd;
 
 	ipcd = catpt_readl_shim(cdev, IPCD);
+	trace_catpt_ipc_notify(ipcd);
 
 	/* ensure there is delayed reply or notification to process */
 	if (!(ipcd & CATPT_IPCD_BUSY))
@@ -259,6 +268,7 @@ irqreturn_t catpt_dsp_irq_handler(int irq, void *dev_id)
 	u32 isc, ipcc;
 
 	isc = catpt_readl_shim(cdev, ISC);
+	trace_catpt_irq(isc);
 
 	/* immediate reply */
 	if (isc & CATPT_ISC_IPCCD) {
@@ -266,6 +276,7 @@ irqreturn_t catpt_dsp_irq_handler(int irq, void *dev_id)
 		catpt_updatel_shim(cdev, IMC, CATPT_IMC_IPCCD, CATPT_IMC_IPCCD);
 
 		ipcc = catpt_readl_shim(cdev, IPCC);
+		trace_catpt_ipc_reply(ipcc);
 		catpt_dsp_copy_rx(cdev, ipcc);
 		complete(&cdev->ipc.done_completion);
 
diff --git a/sound/soc/intel/catpt/trace.h b/sound/soc/intel/catpt/trace.h
new file mode 100644
index 000000000000..bb3d627dbeaf
--- /dev/null
+++ b/sound/soc/intel/catpt/trace.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2020 Intel Corporation. All rights reserved.
+ *
+ * Author: Cezary Rojewski <cezary.rojewski at intel.com>
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM intel_catpt
+
+#if !defined(__SND_SOC_INTEL_CATPT_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define __SND_SOC_INTEL_CATPT_TRACE_H
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+DECLARE_EVENT_CLASS(catpt_ipc_msg,
+
+	TP_PROTO(u32 header),
+
+	TP_ARGS(header),
+
+	TP_STRUCT__entry(
+		__field(u32, header)
+	),
+
+	TP_fast_assign(
+		__entry->header = header;
+	),
+
+	TP_printk("0x%08x", __entry->header)
+);
+
+DEFINE_EVENT(catpt_ipc_msg, catpt_irq,
+	TP_PROTO(u32 header),
+	TP_ARGS(header)
+);
+
+DEFINE_EVENT(catpt_ipc_msg, catpt_ipc_request,
+	TP_PROTO(u32 header),
+	TP_ARGS(header)
+);
+
+DEFINE_EVENT(catpt_ipc_msg, catpt_ipc_reply,
+	TP_PROTO(u32 header),
+	TP_ARGS(header)
+);
+
+DEFINE_EVENT(catpt_ipc_msg, catpt_ipc_notify,
+	TP_PROTO(u32 header),
+	TP_ARGS(header)
+);
+
+TRACE_EVENT_CONDITION(catpt_ipc_payload,
+
+	TP_PROTO(const u8 *data, size_t size),
+
+	TP_ARGS(data, size),
+
+	TP_CONDITION(data && size),
+
+	TP_STRUCT__entry(
+		__dynamic_array(u8, buf, size)
+	),
+
+	TP_fast_assign(
+		memcpy(__get_dynamic_array(buf), data, size);
+	),
+
+	TP_printk("%u byte(s)%s",
+		  __get_dynamic_array_len(buf),
+		  __print_hex_dump("", DUMP_PREFIX_NONE, 16, 4,
+				   __get_dynamic_array(buf),
+				   __get_dynamic_array_len(buf), false))
+);
+
+#endif /* __SND_SOC_INTEL_CATPT_TRACE_H */
+
+/* This part must be outside protection */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_FILE trace
+#include <trace/define_trace.h>
-- 
2.17.1