ASoC: SOF: Introduce IPC3 ops

Add the IPC ops including the topology-related IPC ops for the current
version (IPC3, named after the current SOF firmware ABI major version 3.0)
of IPC supported by the SOF firmware and set it as default. The topology
IPC ops and the widget ops within the topology IPC ops are both
mandatory.

With the introduction of IPC3 ops, we define the list of tokens pertaining
to the AIF_IN/AIF_OUT widgets. Then these tokens are parsed during
topology parsing and saved as part of the swidget tuples array. Once
topology parsing is complete, these tokens will be applied to create the
IPC structure for the host component based on the topology widget_setup
op in ipc3_tplg_ops.
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220314200520.1233427-6-ranjani.sridharan@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/Makefile

 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
 
 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
+		control.o trace.o iomem-utils.o sof-audio.o stream-ipc.o\
+		ipc3-topology.o
 ifneq ($(CONFIG_SND_SOC_SOF_CLIENT),)
 snd-sof-objs += sof-client.o
 endif

sound/soc/sof/ipc.c

@@ -1023,6 +1023,18 @@ struct snd_sof_ipc *snd_sof_ipc_init(struct snd_sof_dev *sdev)
 
 	init_waitqueue_head(&msg->waitq);
 
+	/*
+	 * Use IPC3 ops as it is the only available version now. With the addition of new IPC
+	 * versions, this will need to be modified to use the selected version at runtime.
+	 */
+	ipc->ops = &ipc3_ops;
+
+	/* check for mandatory ops */
+	if (!ipc->ops->tplg || !ipc->ops->tplg->widget) {
+		dev_err(sdev->dev, "Invalid topology IPC ops\n");
+		return NULL;
+	}
+
 	return ipc;
 }
 EXPORT_SYMBOL(snd_sof_ipc_init);

sound/soc/sof/ipc3-topology.c

+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license.  When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2021 Intel Corporation. All rights reserved.
+//
+//
+
+#include <uapi/sound/sof/tokens.h>
+#include <sound/pcm_params.h>
+#include "sof-priv.h"
+#include "sof-audio.h"
+#include "ops.h"
+
+/* PCM */
+static const struct sof_topology_token pcm_tokens[] = {
+	{SOF_TKN_PCM_DMAC_CONFIG, SND_SOC_TPLG_TUPLE_TYPE_WORD, get_token_u32,
+		offsetof(struct sof_ipc_comp_host, dmac_config)},
+};
+
+/* Generic components */
+static const struct sof_topology_token comp_tokens[] = {
+	{SOF_TKN_COMP_PERIOD_SINK_COUNT, SND_SOC_TPLG_TUPLE_TYPE_WORD, get_token_u32,
+		offsetof(struct sof_ipc_comp_config, periods_sink)},
+	{SOF_TKN_COMP_PERIOD_SOURCE_COUNT, SND_SOC_TPLG_TUPLE_TYPE_WORD, get_token_u32,
+		offsetof(struct sof_ipc_comp_config, periods_source)},
+	{SOF_TKN_COMP_FORMAT,
+		SND_SOC_TPLG_TUPLE_TYPE_STRING, get_token_comp_format,
+		offsetof(struct sof_ipc_comp_config, frame_fmt)},
+};
+
+/* Core tokens */
+static const struct sof_topology_token core_tokens[] = {
+	{SOF_TKN_COMP_CORE_ID, SND_SOC_TPLG_TUPLE_TYPE_WORD, get_token_u32,
+		offsetof(struct sof_ipc_comp, core)},
+};
+
+/* Component extended tokens */
+static const struct sof_topology_token comp_ext_tokens[] = {
+	{SOF_TKN_COMP_UUID, SND_SOC_TPLG_TUPLE_TYPE_UUID, get_token_uuid,
+		offsetof(struct snd_sof_widget, uuid)},
+};
+
+static const struct sof_token_info ipc3_token_list[SOF_TOKEN_COUNT] = {
+	[SOF_PCM_TOKENS] = {"PCM tokens", pcm_tokens, ARRAY_SIZE(pcm_tokens)},
+	[SOF_COMP_TOKENS] = {"Comp tokens", comp_tokens, ARRAY_SIZE(comp_tokens)},
+	[SOF_CORE_TOKENS] = {"Core tokens", core_tokens, ARRAY_SIZE(core_tokens)},
+	[SOF_COMP_EXT_TOKENS] = {"AFE tokens", comp_ext_tokens, ARRAY_SIZE(comp_ext_tokens)},
+};
+
+/**
+ * sof_comp_alloc - allocate and initialize buffer for a new component
+ * @swidget: pointer to struct snd_sof_widget containing extended data
+ * @ipc_size: IPC payload size that will be updated depending on valid
+ *  extended data.
+ * @index: ID of the pipeline the component belongs to
+ *
+ * Return: The pointer to the new allocated component, NULL if failed.
+ */
+static void *sof_comp_alloc(struct snd_sof_widget *swidget, size_t *ipc_size,
+			    int index)
+{
+	struct sof_ipc_comp *comp;
+	size_t total_size = *ipc_size;
+	size_t ext_size = sizeof(swidget->uuid);
+
+	/* only non-zero UUID is valid */
+	if (!guid_is_null(&swidget->uuid))
+		total_size += ext_size;
+
+	comp = kzalloc(total_size, GFP_KERNEL);
+	if (!comp)
+		return NULL;
+
+	/* configure comp new IPC message */
+	comp->hdr.size = total_size;
+	comp->hdr.cmd = SOF_IPC_GLB_TPLG_MSG | SOF_IPC_TPLG_COMP_NEW;
+	comp->id = swidget->comp_id;
+	comp->pipeline_id = index;
+	comp->core = swidget->core;
+
+	/* handle the extended data if needed */
+	if (total_size > *ipc_size) {
+		/* append extended data to the end of the component */
+		memcpy((u8 *)comp + *ipc_size, &swidget->uuid, ext_size);
+		comp->ext_data_length = ext_size;
+	}
+
+	/* update ipc_size and return */
+	*ipc_size = total_size;
+	return comp;
+}
+
+static void sof_dbg_comp_config(struct snd_soc_component *scomp, struct sof_ipc_comp_config *config)
+{
+	dev_dbg(scomp->dev, " config: periods snk %d src %d fmt %d\n",
+		config->periods_sink, config->periods_source,
+		config->frame_fmt);
+}
+
+static int sof_ipc3_widget_setup_comp_host(struct snd_sof_widget *swidget)
+{
+	struct snd_soc_component *scomp = swidget->scomp;
+	struct sof_ipc_comp_host *host;
+	size_t ipc_size = sizeof(*host);
+	int ret;
+
+	host = sof_comp_alloc(swidget, &ipc_size, swidget->pipeline_id);
+	if (!host)
+		return -ENOMEM;
+	swidget->private = host;
+
+	/* configure host comp IPC message */
+	host->comp.type = SOF_COMP_HOST;
+	host->config.hdr.size = sizeof(host->config);
+
+	if (swidget->id == snd_soc_dapm_aif_out)
+		host->direction = SOF_IPC_STREAM_CAPTURE;
+	else
+		host->direction = SOF_IPC_STREAM_PLAYBACK;
+
+	/* parse one set of pcm_tokens */
+	ret = sof_update_ipc_object(scomp, host, SOF_PCM_TOKENS, swidget->tuples,
+				    swidget->num_tuples, sizeof(*host), 1);
+	if (ret < 0)
+		goto err;
+
+	/* parse one set of comp_tokens */
+	ret = sof_update_ipc_object(scomp, &host->config, SOF_COMP_TOKENS, swidget->tuples,
+				    swidget->num_tuples, sizeof(host->config), 1);
+	if (ret < 0)
+		goto err;
+
+	dev_dbg(scomp->dev, "loaded host %s\n", swidget->widget->name);
+	sof_dbg_comp_config(scomp, &host->config);
+
+	return 0;
+err:
+	kfree(swidget->private);
+	swidget->private = NULL;
+
+	return ret;
+}
+
+static void sof_ipc3_widget_free_comp(struct snd_sof_widget *swidget)
+{
+	kfree(swidget->private);
+}
+
+/* token list for each topology object */
+static enum sof_tokens host_token_list[] = {
+	SOF_CORE_TOKENS,
+	SOF_COMP_EXT_TOKENS,
+	SOF_PCM_TOKENS,
+	SOF_COMP_TOKENS,
+};
+
+static const struct sof_ipc_tplg_widget_ops tplg_ipc3_widget_ops[SND_SOC_DAPM_TYPE_COUNT] = {
+	[snd_soc_dapm_aif_in] =  {sof_ipc3_widget_setup_comp_host, sof_ipc3_widget_free_comp,
+				  host_token_list, ARRAY_SIZE(host_token_list), NULL},
+	[snd_soc_dapm_aif_out] = {sof_ipc3_widget_setup_comp_host, sof_ipc3_widget_free_comp,
+				  host_token_list, ARRAY_SIZE(host_token_list), NULL},
+};
+
+static const struct sof_ipc_tplg_ops ipc3_tplg_ops = {
+	.widget = tplg_ipc3_widget_ops,
+	.token_list = ipc3_token_list,
+};
+
+const struct sof_ipc_ops ipc3_ops = {
+	.tplg = &ipc3_tplg_ops,
+};

sound/soc/sof/sof-priv.h

@@ -370,6 +370,8 @@ struct sof_ipc_ops {
 	const struct sof_ipc_tplg_ops *tplg;
 };
 
+extern const struct sof_ipc_ops ipc3_ops;
+
 /* SOF generic IPC data */
 struct snd_sof_ipc {
 	struct snd_sof_dev *sdev;