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author | Takashi Iwai <tiwai@suse.de> | 2021-10-17 09:48:59 +0200 |
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committer | Takashi Iwai <tiwai@suse.de> | 2021-10-18 13:32:13 +0200 |
commit | 2d9ea39917a4e4293bc2caea902c7059a330b611 (patch) | |
tree | 07b9ee3a8103a1f1f0872c63caac39321cbe5f13 /sound/oss | |
parent | 73325f60e2ed28f04032d43c2828b73776cfefd0 (diff) | |
download | linux-2d9ea39917a4e4293bc2caea902c7059a330b611.tar.bz2 |
ALSA: memalloc: Convert x86 SG-buffer handling with non-contiguous type
We've had an x86-specific SG-buffer handling code, but now it can be
merged gracefully with the standard non-contiguous DMA pages.
After the migration, SNDRV_DMA_TYPE_DMA_SG becomes identical with
SNDRV_DMA_TYPE_NONCONTIG on x86, while others still fall back to
SNDRV_DMA_TYPE_DEV.
The remaining problem is about the SG-buffer with WC pages: the DMA
core stuff on x86 doesn't treat it well, so we still need some special
handling to manipulate the page attribute manually. The mmap handler
for SNDRV_DMA_TYPE_DEV_SG_WC still returns -ENOENT intentionally for
the fallback to the default handler.
Link: https://lore.kernel.org/r/20211017074859.24112-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/oss')
0 files changed, 0 insertions, 0 deletions