ASoC: SOF: ext_manifest: parse windows

The window 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/20200415202816.934-7-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 25 insertions, 2 deletions

diff --git a/sound/soc/sof/loader.c b/sound/soc/sof/loader.c
index 01077c1ce235..bbfdf07fa6f5 100644
--- a/sound/soc/sof/loader.c
+++ b/sound/soc/sof/loader.c
@@ -20,13 +20,21 @@ static int get_ext_windows(struct snd_sof_dev *sdev,
 {
 	const struct sof_ipc_window *w =
 		container_of(ext_hdr, struct sof_ipc_window, ext_hdr);
+	size_t w_size = struct_size(w, window, w->num_windows);
+
+	if (sdev->info_window) {
+		if (memcmp(sdev->info_window, w, w_size)) {
+			dev_err(sdev->dev, "error: mistmatch between window descriptor from extended manifest and mailbox");
+			return -EINVAL;
+		}
+		return 0;
+	}
 
 	if (w->num_windows == 0 || w->num_windows > SOF_IPC_MAX_ELEMS)
 		return -EINVAL;
 
 	/* keep a local copy of the data */
-	sdev->info_window = kmemdup(w, struct_size(w, window, w->num_windows),
-				    GFP_KERNEL);
+	sdev->info_window = kmemdup(w, w_size, GFP_KERNEL);
 	if (!sdev->info_window)
 		return -ENOMEM;
 
@@ -141,6 +149,18 @@ static int ext_man_get_fw_version(struct snd_sof_dev *sdev,
 	return snd_sof_ipc_valid(sdev);
 }
 
+static int ext_man_get_windows(struct snd_sof_dev *sdev,
+			       const struct sof_ext_man_elem_header *hdr)
+{
+	const struct sof_ipc_ext_data_hdr *w_ipc;
+	const struct sof_ext_man_window *w;
+
+	w = container_of(hdr, struct sof_ext_man_window, hdr);
+	w_ipc = (const struct sof_ipc_ext_data_hdr *)&w->ipc_window;
+
+	return get_ext_windows(sdev, w_ipc);
+}
+
 static ssize_t snd_sof_ext_man_size(const struct firmware *fw)
 {
 	const struct sof_ext_man_header *head = (void *)fw->data;
@@ -218,6 +238,9 @@ static int snd_sof_fw_ext_man_parse(struct snd_sof_dev *sdev,
 		case SOF_EXT_MAN_ELEM_FW_VERSION:
 			ret = ext_man_get_fw_version(sdev, elem_hdr);
 			break;
+		case SOF_EXT_MAN_ELEM_WINDOW:
+			ret = ext_man_get_windows(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);