ASoC: SOF: ext_manifest: parse compiler version

The compiler version and description can be extracted from the
extended manifest content. This information known at build time
does not need to be provided in a mailbox.
Signed-off-by: Karol Trzcinski <karolx.trzcinski@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200415202816.934-8-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/uapi/sound/sof/ext_manifest.h

@@ -56,6 +56,7 @@ struct sof_ext_man_header {
 enum sof_ext_man_elem_type {
 	SOF_EXT_MAN_ELEM_FW_VERSION		= 0,
 	SOF_EXT_MAN_ELEM_WINDOW			= SOF_IPC_EXT_WINDOW,
+	SOF_EXT_MAN_ELEM_CC_VERSION		= SOF_IPC_EXT_CC_INFO,
 };
 
 /* extended manifest element header */
@@ -80,4 +81,11 @@ struct sof_ext_man_window {
 	struct sof_ipc_window ipc_window;
 } __packed;
 
+/* Used C compiler description */
+struct sof_ext_man_cc_version {
+	struct sof_ext_man_elem_header hdr;
+	/* use sof_ipc struct because of code re-use */
+	struct sof_ipc_cc_version cc_version;
+} __packed;
+
 #endif /* __SOF_FIRMWARE_EXT_MANIFEST_H__ */

sound/soc/sof/loader.c

@@ -49,6 +49,14 @@ static int get_cc_info(struct snd_sof_dev *sdev,
 	const struct sof_ipc_cc_version *cc =
 		container_of(ext_hdr, struct sof_ipc_cc_version, ext_hdr);
 
+	if (sdev->cc_version) {
+		if (memcmp(sdev->cc_version, cc, cc->ext_hdr.hdr.size)) {
+			dev_err(sdev->dev, "error: receive diverged cc_version descriptions");
+			return -EINVAL;
+		}
+		return 0;
+	}
+
 	dev_dbg(sdev->dev, "Firmware info: used compiler %s %d:%d:%d%s used optimization flags %s\n",
 		cc->name, cc->major, cc->minor, cc->micro, cc->desc,
 		cc->optim);
@@ -161,6 +169,18 @@ static int ext_man_get_windows(struct snd_sof_dev *sdev,
 	return get_ext_windows(sdev, w_ipc);
 }
 
+static int ext_man_get_cc_info(struct snd_sof_dev *sdev,
+			       const struct sof_ext_man_elem_header *hdr)
+{
+	const struct sof_ext_man_cc_version *cc;
+	const struct sof_ipc_ext_data_hdr *cc_version;
+
+	cc = container_of(hdr, struct sof_ext_man_cc_version, hdr);
+	cc_version = (const struct sof_ipc_ext_data_hdr *)&cc->cc_version;
+
+	return get_cc_info(sdev, cc_version);
+}
+
 static ssize_t snd_sof_ext_man_size(const struct firmware *fw)
 {
 	const struct sof_ext_man_header *head = (void *)fw->data;
@@ -241,6 +261,9 @@ static int snd_sof_fw_ext_man_parse(struct snd_sof_dev *sdev,
 		case SOF_EXT_MAN_ELEM_WINDOW:
 			ret = ext_man_get_windows(sdev, elem_hdr);
 			break;
+		case SOF_EXT_MAN_ELEM_CC_VERSION:
+			ret = ext_man_get_cc_info(sdev, elem_hdr);
+			break;
 		default:
 			dev_warn(sdev->dev, "warning: unknown sof_ext_man header type %d size 0x%X\n",
 				 elem_hdr->type, elem_hdr->size);