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Commit 71fc4c7e authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: hda - Move generic array helpers to core lib 



This will be used by the regmap support.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent e311782a

include/sound/hdaudio.h

+33 −0
Original line number Diff line number Diff line
@@ -21,6 +21,17 @@ 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

 */
@@ -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 */

sound/hda/Makefile

+2 −1
Original line number Diff line number Diff line 
snd-hda-core-objs := hda_bus_type.o hdac_bus.o hdac_device.o hdac_sysfs.o

snd-hda-core-objs := hda_bus_type.o hdac_bus.o hdac_device.o hdac_sysfs.o \

	array.o



snd-hda-core-objs += trace.o

CFLAGS_trace.o := -I$(src)

sound/hda/array.c

0 → 100644
+49 −0
Original line number Diff line number Diff line 
/*

 * generic arrays

 */



#include <linux/slab.h>

#include <sound/core.h>

#include <sound/hdaudio.h>



/**

 * snd_array_new - get a new element from the given array

 * @array: the array object

 *

 * Get a new element from the given array.  If it exceeds the

 * pre-allocated array size, re-allocate the array.

 *

 * Returns NULL if allocation failed.

 */

void *snd_array_new(struct snd_array *array)

{

	if (snd_BUG_ON(!array->elem_size))

		return NULL;

	if (array->used >= array->alloced) {

		int num = array->alloced + array->alloc_align;

		int size = (num + 1) * array->elem_size;

		void *nlist;

		if (snd_BUG_ON(num >= 4096))

			return NULL;

		nlist = krealloc(array->list, size, GFP_KERNEL | __GFP_ZERO);

		if (!nlist)

			return NULL;

		array->list = nlist;

		array->alloced = num;

	}

	return snd_array_elem(array, array->used++);

}

EXPORT_SYMBOL_GPL(snd_array_new);



/**

 * snd_array_free - free the given array elements

 * @array: the array object

 */

void snd_array_free(struct snd_array *array)

{

	kfree(array->list);

	array->used = 0;

	array->alloced = 0;

	array->list = NULL;

}

EXPORT_SYMBOL_GPL(snd_array_free);

sound/pci/hda/hda_codec.c

+0 −46
Original line number Diff line number Diff line
@@ -5012,52 +5012,6 @@ void snd_hda_bus_reset(struct hda_bus *bus) 
}

EXPORT_SYMBOL_GPL(snd_hda_bus_reset);



/*

 * generic arrays

 */



/**

 * snd_array_new - get a new element from the given array

 * @array: the array object

 *

 * Get a new element from the given array.  If it exceeds the

 * pre-allocated array size, re-allocate the array.

 *

 * Returns NULL if allocation failed.

 */

void *snd_array_new(struct snd_array *array)

{

	if (snd_BUG_ON(!array->elem_size))

		return NULL;

	if (array->used >= array->alloced) {

		int num = array->alloced + array->alloc_align;

		int size = (num + 1) * array->elem_size;

		void *nlist;

		if (snd_BUG_ON(num >= 4096))

			return NULL;

		nlist = krealloc(array->list, size, GFP_KERNEL | __GFP_ZERO);

		if (!nlist)

			return NULL;

		array->list = nlist;

		array->alloced = num;

	}

	return snd_array_elem(array, array->used++);

}

EXPORT_SYMBOL_GPL(snd_array_new);



/**

 * snd_array_free - free the given array elements

 * @array: the array object

 */

void snd_array_free(struct snd_array *array)

{

	kfree(array->list);

	array->used = 0;

	array->alloced = 0;

	array->list = NULL;

}

EXPORT_SYMBOL_GPL(snd_array_free);



/**

 * snd_print_pcm_bits - Print the supported PCM fmt bits to the string buffer

 * @pcm: PCM caps bits

sound/pci/hda/hda_codec.h

+0 −30
Original line number Diff line number Diff line
@@ -29,36 +29,6 @@ 
#include <sound/hdaudio.h>

#include <sound/hda_verbs.h>



/*

 * generic arrays

 */

struct snd_array {

	unsigned int used;

	unsigned int alloced;

	unsigned int elem_size;

	unsigned int alloc_align;

	void *list;

};



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;

}



/*

 * Structures

 */