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: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20200520165911.21696-5-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/include/sound/sof/ext_manifest.h b/include/sound/sof/ext_manifest.h
index 6ed787eb788ce245458052ae25025346f0d42e29..0001fc5779efdd678c3d8117418faf26fbc6b87d 100644 (file)
--- a/include/sound/sof/ext_manifest.h
+++ b/include/sound/sof/ext_manifest.h
@@ -58,6 +58,7 @@ struct sof_ext_man_header {
 /* Extended manifest elements types */
 enum sof_ext_man_elem_type {
        SOF_EXT_MAN_ELEM_FW_VERSION             = 0,
+       SOF_EXT_MAN_ELEM_WINDOW                 = SOF_IPC_EXT_WINDOW,
 };
 
 /* extended manifest element header */
@@ -76,4 +77,11 @@ struct sof_ext_man_fw_version {
        uint32_t flags;
 } __packed;
 
+/* extended data memory windows for IPC, trace and debug */
+struct sof_ext_man_window {
+       struct sof_ext_man_elem_header hdr;
+       /* use sof_ipc struct because of code re-use */
+       struct sof_ipc_window ipc_window;
+} __packed;
+
 #endif /* __SOF_FIRMWARE_EXT_MANIFEST_H__ */

diff --git a/sound/soc/sof/loader.c b/sound/soc/sof/loader.c
index 8b42613304a7526329367c8e087a4189684eee29..6e92a1285b9182f715dcfe2bd20cdec77a716dfa 100644 (file)
--- 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 (w->num_windows == 0 || w->num_windows > SOF_IPC_MAX_ELEMS)
                return -EINVAL;
 
+       if (sdev->info_window) {
+               if (memcmp(sdev->info_window, w, w_size)) {
+                       dev_err(sdev->dev, "error: mismatch between window descriptor from extended manifest and mailbox");
+                       return -EINVAL;
+               }
+               return 0;
+       }
+
        /* 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;
 
@@ -140,6 +148,16 @@ 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_ext_man_window *w;
+
+       w = container_of(hdr, struct sof_ext_man_window, hdr);
+
+       return get_ext_windows(sdev, &w->ipc_window.ext_hdr);
+}
+
 static ssize_t snd_sof_ext_man_size(const struct firmware *fw)
 {
        const struct sof_ext_man_header *head;
@@ -213,6 +231,9 @@ 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);