ALSA: hda - Move generic array helpers to core lib

This will be used by the regmap support.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 33 insertions, 0 deletions

diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 675614dc2b88..3abdd3f16528 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -22,6 +22,17 @@ struct hdac_widget_tree;
 extern struct bus_type snd_hda_bus_type;
 
 /*
+ * generic arrays
+ */
+struct snd_array {
+        unsigned int used;
+        unsigned int alloced;
+        unsigned int elem_size;
+        unsigned int alloc_align;
+        void *list;
+};
+
+/*
  * HD-audio codec base device
  */
 struct hdac_device {
@@ -178,4 +189,26 @@ static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
         clear_bit(codec->addr, &codec->bus->codec_powered);
 }
 
+/*
+ * generic array helpers
+ */
+void *snd_array_new(struct snd_array *array);
+void snd_array_free(struct snd_array *array);
+static inline void snd_array_init(struct snd_array *array, unsigned int size,
+                                  unsigned int align)
+{
+        array->elem_size = size;
+        array->alloc_align = align;
+}
+
+static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
+{
+        return array->list + idx * array->elem_size;
+}
+
+static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
+{
+        return (unsigned long)(ptr - array->list) / array->elem_size;
+}
+
 #endif /* __SOUND_HDAUDIO_H */