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authorTakashi Iwai <tiwai@suse.de>2024-09-12 17:52:25 +0200
committerTakashi Iwai <tiwai@suse.de>2024-09-12 18:02:18 +0200
commit0b9f2bd00fc3677e38ae5e46ff79b8d48d9cb02e (patch)
tree78ca421c467de117671f974bced38aea530c99a3 /sound/soc/sh/siu_dai.c
parentALSA: memalloc: Use proper DMA mapping API for x86 WC buffer allocations (diff)
downloadlinux-0b9f2bd00fc3677e38ae5e46ff79b8d48d9cb02e.tar.xz
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ALSA: memalloc: Use proper DMA mapping API for x86 S/G buffer allocations
The fallback S/G buffer allocation for x86 used the addresses deduced from the page allocations blindly. It broke the allocations on IOMMU and made us to work around with a hackish DMA ops check. For cleaning up those messes, this patch switches to the proper DMA mapping API usages with the standard sg-table instead. By introducing the sg-table, the address table isn't needed, but for keeping the original allocation sizes for freeing, replace it with the array keeping the number of pages. The get_addr callback is changed to use the existing one for non-contiguous buffers. (Also it's the reason sg_table is put at the beginning of struct snd_dma_sg_fallback.) And finally, the hackish workaround that checks the DMA ops is dropped now. Link: https://patch.msgid.link/20240912155227.4078-3-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
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