ASoC: SOF: ext_manifest: Parse firmware config dictionary

Values given in this dictionary describes used firmware configuration,
like feature availability, buffer size limits and similar properties.
Signed-off-by: Karol Trzcinski <karolx.trzcinski@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20201124180017.2232128-2-kai.vehmanen@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/sof/ext_manifest.h

@@ -61,6 +61,7 @@ enum sof_ext_man_elem_type {
 	SOF_EXT_MAN_ELEM_WINDOW			= SOF_IPC_EXT_WINDOW,
 	SOF_EXT_MAN_ELEM_CC_VERSION		= SOF_IPC_EXT_CC_INFO,
 	SOF_EXT_MAN_ELEM_DBG_ABI		= SOF_IPC_EXT_USER_ABI_INFO,
+	SOF_EXT_MAN_ELEM_CONFIG_DATA		= 5, /**< ABI3.17 */
 };
 
 /* extended manifest element header */
@@ -99,4 +100,22 @@ struct ext_man_dbg_abi {
 	struct sof_ipc_user_abi_version dbg_abi;
 } __packed;
 
+/* EXT_MAN_ELEM_CONFIG_DATA elements identificators, ABI3.17 */
+enum config_elem_type {
+	SOF_EXT_MAN_CONFIG_EMPTY		= 0,
+	SOF_EXT_MAN_CONFIG_IPC_MSG_SIZE		= 1,
+};
+
+struct sof_config_elem {
+	uint32_t token;
+	uint32_t value;
+} __packed;
+
+/* firmware configuration information */
+struct sof_ext_man_config_data {
+	struct sof_ext_man_elem_header hdr;
+
+	struct sof_config_elem elems[];
+} __packed;
+
 #endif /* __SOF_FIRMWARE_EXT_MANIFEST_H__ */

sound/soc/sof/loader.c

@@ -197,6 +197,44 @@ static int ext_man_get_dbg_abi_info(struct snd_sof_dev *sdev,
 	return 0;
 }
 
+static int ext_man_get_config_data(struct snd_sof_dev *sdev,
+				   const struct sof_ext_man_elem_header *hdr)
+{
+	const struct sof_ext_man_config_data *config =
+		container_of(hdr, struct sof_ext_man_config_data, hdr);
+	const struct sof_config_elem *elem;
+	int elems_counter;
+	int elems_size;
+	int i;
+
+	/* calculate elements counter */
+	elems_size = config->hdr.size - sizeof(struct sof_ext_man_elem_header);
+	elems_counter = elems_size / sizeof(struct sof_config_elem);
+
+	dev_dbg(sdev->dev, "%s can hold up to %d config elements\n",
+		__func__, elems_counter);
+
+	for (i = 0; i < elems_counter; ++i) {
+		elem = &config->elems[i];
+		dev_dbg(sdev->dev, "%s get index %d token %d val %d\n",
+			__func__, i, elem->token, elem->value);
+		switch (elem->token) {
+		case SOF_EXT_MAN_CONFIG_EMPTY:
+			/* unused memory space is zero filled - mapped to EMPTY elements */
+			break;
+		case SOF_EXT_MAN_CONFIG_IPC_MSG_SIZE:
+			/* TODO: use ipc msg size from config data */
+			break;
+		default:
+			dev_info(sdev->dev, "Unknown firmware configuration token %d value %d",
+				 elem->token, elem->value);
+			break;
+		}
+	}
+
+	return 0;
+}
+
 static ssize_t snd_sof_ext_man_size(const struct firmware *fw)
 {
 	const struct sof_ext_man_header *head;
@@ -279,6 +317,9 @@ static int snd_sof_fw_ext_man_parse(struct snd_sof_dev *sdev,
 		case SOF_EXT_MAN_ELEM_DBG_ABI:
 			ret = ext_man_get_dbg_abi_info(sdev, elem_hdr);
 			break;
+		case SOF_EXT_MAN_ELEM_CONFIG_DATA:
+			ret = ext_man_get_config_data(sdev, elem_hdr);
+			break;
 		default:
 			dev_info(sdev->dev, "unknown sof_ext_man header type %d size 0x%X\n",
 				 elem_hdr->type, elem_hdr->size);