Hi, I've tried to renew the fixes of ALSA issues about non-coherent DMA memories. The last patch worked for SG-buffers somehow but would result in a problem if many pages are allocated because of dma_alloc_coherent() handling. Now, I chose a more simpler workaround: the SG-buffers are handled as simple continuous buffers.
This time I split the patches to several parts. The first patch contains a very lazy dma_mmap_coherent() implementation for ppc32. The next patch adds the call of dma_mmap_coherent() for the default mmap of ALSA PCM. And the last one is to add the conversion of SG-buffer handling as above. The patches are created against the latest ALSA tree, and the last patch won't be applicable fully to 2.6.26-rc6. But, it's only for snd-hda-intel and there is no PPC32 hardware supporting this, AFAIK. So just ignore the reject. The patches are found also on my git tree, dma-fix branch of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git Any comments and test reports are appreciated, especially about dma_mmap_coherent() addition. thanks, Takashi _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev