ASoC: SOF: debug: Add generic API and ops for DSP regions

Add new debugfs_add_region_item along with a generic wrapper
snd_sof_debugfs_add_region_item() to abstract away the DSP regions related
debugfs support.

At the same commit add iomem based generic implementation for the new ops
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@gmail.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20210915122116.18317-9-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/debug.c

@@ -588,6 +588,21 @@ int snd_sof_debugfs_io_item(struct snd_sof_dev *sdev,
 }
 EXPORT_SYMBOL_GPL(snd_sof_debugfs_io_item);
 
+int snd_sof_debugfs_add_region_item_iomem(struct snd_sof_dev *sdev,
+					  enum snd_sof_fw_blk_type blk_type, u32 offset,
+					  size_t size, const char *name,
+					  enum sof_debugfs_access_type access_type)
+{
+	int bar = snd_sof_dsp_get_bar_index(sdev, blk_type);
+
+	if (bar < 0)
+		return bar;
+
+	return snd_sof_debugfs_io_item(sdev, sdev->bar[bar] + offset, size, name,
+				       access_type);
+}
+EXPORT_SYMBOL_GPL(snd_sof_debugfs_add_region_item_iomem);
+
 /* create FS entry for debug files to expose kernel memory */
 int snd_sof_debugfs_buf_item(struct snd_sof_dev *sdev,
 			     void *base, size_t size,

sound/soc/sof/ops.h

@@ -253,6 +253,17 @@ static inline void snd_sof_ipc_dump(struct snd_sof_dev *sdev)
 		sof_ops(sdev)->ipc_dump(sdev);
 }
 
+static inline int snd_sof_debugfs_add_region_item(struct snd_sof_dev *sdev,
+		enum snd_sof_fw_blk_type blk_type, u32 offset, size_t size,
+		const char *name, enum sof_debugfs_access_type access_type)
+{
+	if (sof_ops(sdev) && sof_ops(sdev)->debugfs_add_region_item)
+		return sof_ops(sdev)->debugfs_add_region_item(sdev, blk_type, offset,
+							      size, name, access_type);
+
+	return 0;
+}
+
 /* register IO */
 static inline void snd_sof_dsp_write(struct snd_sof_dev *sdev, u32 bar,
 				     u32 offset, u32 value)

sound/soc/sof/sof-priv.h

@@ -83,6 +83,16 @@ enum sof_system_suspend_state {
 	SOF_SUSPEND_S3,
 };
 
+enum sof_dfsentry_type {
+	SOF_DFSENTRY_TYPE_IOMEM = 0,
+	SOF_DFSENTRY_TYPE_BUF,
+};
+
+enum sof_debugfs_access_type {
+	SOF_DEBUGFS_ACCESS_ALWAYS = 0,
+	SOF_DEBUGFS_ACCESS_D0_ONLY,
+};
+
 struct snd_sof_dev;
 struct snd_sof_ipc_msg;
 struct snd_sof_ipc;
@@ -237,6 +247,10 @@ struct snd_sof_dsp_ops {
 	void (*dbg_dump)(struct snd_sof_dev *sof_dev,
 			 u32 flags); /* optional */
 	void (*ipc_dump)(struct snd_sof_dev *sof_dev); /* optional */
+	int (*debugfs_add_region_item)(struct snd_sof_dev *sdev,
+				       enum snd_sof_fw_blk_type blk_type, u32 offset,
+				       size_t size, const char *name,
+				       enum sof_debugfs_access_type access_type); /* optional */
 
 	/* host DMA trace initialization */
 	int (*trace_init)(struct snd_sof_dev *sdev,
@@ -286,16 +300,6 @@ struct sof_ops_table {
 	const struct snd_sof_dsp_ops *ops;
 };
 
-enum sof_dfsentry_type {
-	SOF_DFSENTRY_TYPE_IOMEM = 0,
-	SOF_DFSENTRY_TYPE_BUF,
-};
-
-enum sof_debugfs_access_type {
-	SOF_DEBUGFS_ACCESS_ALWAYS = 0,
-	SOF_DEBUGFS_ACCESS_D0_ONLY,
-};
-
 /* FS entry for debug files that can expose DSP memories, registers */
 struct snd_sof_dfsentry {
 	size_t size;
@@ -534,6 +538,9 @@ void snd_sof_get_status(struct snd_sof_dev *sdev, u32 panic_code,
 int snd_sof_init_trace_ipc(struct snd_sof_dev *sdev);
 void snd_sof_handle_fw_exception(struct snd_sof_dev *sdev);
 int snd_sof_dbg_memory_info_init(struct snd_sof_dev *sdev);
+int snd_sof_debugfs_add_region_item_iomem(struct snd_sof_dev *sdev,
+		enum snd_sof_fw_blk_type blk_type, u32 offset, size_t size,
+		const char *name, enum sof_debugfs_access_type access_type);
 
 /*
  * Platform specific ops.