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authorTakashi Iwai <tiwai@suse.de>2021-10-17 09:48:58 +0200
committerTakashi Iwai <tiwai@suse.de>2021-10-18 13:32:12 +0200
commit73325f60e2ed28f04032d43c2828b73776cfefd0 (patch)
treecd1f8757a850644c6d876e130c724131033d429d /include/sound/memalloc.h
parenta25684a956468ee8bbbee44649e41e5d447e5adc (diff)
downloadlinux-73325f60e2ed28f04032d43c2828b73776cfefd0.tar.bz2
ALSA: memalloc: Support for non-coherent page allocation
Following to the addition of non-contiguous pages, this patch adds the new contiguous non-coherent page allocation to the standard memalloc helper. Like the previous non-contig type, this non-coherent type is also directional and requires the explicit sync, too. Hence the driver using this type of buffer may need to set SNDRV_PCM_INFO_EXPLICIT_SYNC flag to the PCM hardware.info as well, unless it's set up in the managed mode. Link: https://lore.kernel.org/r/20211017074859.24112-3-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound/memalloc.h')
-rw-r--r--include/sound/memalloc.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/sound/memalloc.h b/include/sound/memalloc.h
index 1457eba1ac53..0bdaa6753282 100644
--- a/include/sound/memalloc.h
+++ b/include/sound/memalloc.h
@@ -50,6 +50,7 @@ struct snd_dma_device {
#endif
#define SNDRV_DMA_TYPE_VMALLOC 7 /* vmalloc'ed buffer */
#define SNDRV_DMA_TYPE_NONCONTIG 8 /* non-coherent SG buffer */
+#define SNDRV_DMA_TYPE_NONCOHERENT 9 /* non-coherent buffer */
/*
* info for buffer allocation