ASoC: SOF: Clone the trace code to ipc3-dtrace as fw_tracing implementation

The existing trace.c file is implementing the IPC3 dma-trace support.

Clone the existing code with prefix fixes as ipc3 fw_tracing
implementation to be used when the core is converted to use generic ops
for firmware tracing.

Drop the dual licensing of the content as the implementation is based on
debugfs.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220516104711.26115-4-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/Makefile

@@ -3,6 +3,7 @@
 snd-sof-objs := core.o ops.o loader.o ipc.o pcm.o pm.o debug.o topology.o\
 		control.o trace.o iomem-utils.o sof-audio.o stream-ipc.o\
 		ipc3-topology.o ipc3-control.o ipc3.o ipc3-pcm.o ipc3-loader.o\
+		ipc3-dtrace.o\
 		ipc4.o ipc4-loader.o
 ifneq ($(CONFIG_SND_SOC_SOF_CLIENT),)
 snd-sof-objs += sof-client.o

sound/soc/sof/ipc3-priv.h

@@ -16,6 +16,7 @@ extern const struct sof_ipc_pcm_ops ipc3_pcm_ops;
 extern const struct sof_ipc_tplg_ops ipc3_tplg_ops;
 extern const struct sof_ipc_tplg_control_ops tplg_ipc3_control_ops;
 extern const struct sof_ipc_fw_loader_ops ipc3_loader_ops;
+extern const struct sof_ipc_fw_tracing_ops ipc3_dtrace_ops;
 
 /* helpers for fw_ready and ext_manifest parsing */
 int sof_ipc3_get_ext_windows(struct snd_sof_dev *sdev,
@@ -24,4 +25,8 @@ int sof_ipc3_get_cc_info(struct snd_sof_dev *sdev,
 			 const struct sof_ipc_ext_data_hdr *ext_hdr);
 int sof_ipc3_validate_fw_version(struct snd_sof_dev *sdev);
 
+/* dtrace position update */
+int ipc3_dtrace_posn_update(struct snd_sof_dev *sdev,
+			    struct sof_ipc_dma_trace_posn *posn);
+
 #endif

sound/soc/sof/ipc3.c

@@ -1070,6 +1070,7 @@ const struct sof_ipc_ops ipc3_ops = {
 	.pm = &ipc3_pm_ops,
 	.pcm = &ipc3_pcm_ops,
 	.fw_loader = &ipc3_loader_ops,
+	.fw_tracing = &ipc3_dtrace_ops,
 
 	.tx_msg = sof_ipc3_tx_msg,
 	.rx_msg = sof_ipc3_rx_msg,