diff options
| author | Takashi Iwai <tiwai@suse.de> | 2024-08-01 08:48:06 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2024-08-01 12:45:49 +0200 |
| commit | e469e2045f1b78418f39a2461a9fdf73c2789a1a (patch) | |
| tree | eeddafc9b9605c68f4bb6320d1208fe1a1fa66c5 /include/sound/memalloc.h | |
| parent | 9c27301342a53fdf349e4c630d75c7c12bbbc580 (diff) | |
ALSA: memalloc: Let IOMMU handle S/G primarily
The recent changes in IOMMU made the non-contiguous page allocations
as default, hence we can simply use the standard DMA allocation for
the S/G pages as well. In this patch, we simplify the code by trying
the standard DMA allocation at first, instead of
dma_alloc_noncontiguous().
For the case without IOMMU, we still need to manage the S/G pages
manually, so we keep the same fallback routines like before.
The fallback types (SNDRV_DMA_TYPE_DEV_SG_FALLBACK & co) are dropped /
folded into SNDRV_DMA_TYPE_DEV_SG and co now. The allocation via the
standard DMA call overrides the type accordingly, hence we don't have
to have extra fallback types any longer. OTOH, SNDRV_DMA_TYPE_DEV_SG
is no longer an alias but became its own type back again.
Note that this patch requires another prerequisite fix for memmalloc
helper to use the DMA API for WC pages on x86.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=219087
Link: https://patch.msgid.link/20240801064808.31205-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound/memalloc.h')
| -rw-r--r-- | include/sound/memalloc.h | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/include/sound/memalloc.h b/include/sound/memalloc.h index 43d524580bd2..9dd475cf4e8c 100644 --- a/include/sound/memalloc.h +++ b/include/sound/memalloc.h @@ -42,17 +42,12 @@ struct snd_dma_device { #define SNDRV_DMA_TYPE_NONCONTIG 8 /* non-coherent SG buffer */ #define SNDRV_DMA_TYPE_NONCOHERENT 9 /* non-coherent buffer */ #ifdef CONFIG_SND_DMA_SGBUF -#define SNDRV_DMA_TYPE_DEV_SG SNDRV_DMA_TYPE_NONCONTIG +#define SNDRV_DMA_TYPE_DEV_SG 3 /* S/G pages */ #define SNDRV_DMA_TYPE_DEV_WC_SG 6 /* SG write-combined */ #else #define SNDRV_DMA_TYPE_DEV_SG SNDRV_DMA_TYPE_DEV /* no SG-buf support */ #define SNDRV_DMA_TYPE_DEV_WC_SG SNDRV_DMA_TYPE_DEV_WC #endif -/* fallback types, don't use those directly */ -#ifdef CONFIG_SND_DMA_SGBUF -#define SNDRV_DMA_TYPE_DEV_SG_FALLBACK 10 -#define SNDRV_DMA_TYPE_DEV_WC_SG_FALLBACK 11 -#endif /* * info for buffer allocation |