linux-4.4.1/snd_pcm_lib_preallocate_pages() の履歴(No.1)

• 履歴一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• linux-4.4.1/snd_pcm_lib_preallocate_pages() へ行く。
  • 1 (2017-06-13 (火) 10:41:12)
  • 2 (2017-06-13 (火) 11:19:19)

参照元†

• linux-4.4.1/dmaengine_pcm_new()
• linux-4.4.1/snd_pcm_preallocate_pages_for_all()

説明†

• パス: linux-4.4.1/sound/core/pcm_memory.c

• FIXME: これは何？
  • 説明

引数†

• struct snd_pcm_substream *substream
  • linux-4.4.1/snd_pcm_substream
• int type
• struct device *data
  • linux-4.4.1/device
• size_t size
• size_t max

返り値†

参考†

実装†

/**
 * snd_pcm_lib_preallocate_pages - pre-allocation for the given DMA type
 * @substream: the pcm substream instance
 * @type: DMA type (SNDRV_DMA_TYPE_*)
 * @data: DMA type dependent data
 * @size: the requested pre-allocation size in bytes
 * @max: the max. allowed pre-allocation size
 *
 * Do pre-allocation for the given DMA buffer type.
 *
 * Return: Zero if successful, or a negative error code on failure.
 */
int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
				  int type, struct device *data,
				  size_t size, size_t max)
{
	substream->dma_buffer.dev.type = type;
	substream->dma_buffer.dev.dev = data;
	return snd_pcm_lib_preallocate_pages1(substream, size, max);
}

EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages);

• • [[linux-4.4.1/]]

コメント†