In article <ZtJthK9/wbzky...@homeworld.netbsd.org>,
Emmanuel Dreyfus <m...@netbsd.org> wrote:
>I got some relative success by disabling DMA in piixide on NetBSD 10.0:
>it boots but gets interrupt storms.
>
>piixide(4) says flags 0x0002 disables DMA, but it seems that
>does not happens in piixide sources. I see no usage of
>PCIIDE_OPTIONS_NODMA. To disable DMA, I added in piixsata_chip_map
>this:
>
>+ if (sc->sc_pp->ide_product == PCI_PRODUCT_INTEL_82801H_SATA_1 ||
>+ sc->sc_pp->ide_product == PCI_PRODUCT_INTEL_82801H_SATA_2) {
>+ aprint_verbose_dev(sc->sc_wdcdev.sc_atac.atac_dev,
>+ "DMA disabled (PCI PID 0x%x)\n", sc->sc_pp->ide_product);
>+ sc->sc_dma_ok = 0;
>+ }
>+
It is in pciide_common.c:483
Perhaps define in pciidevar.h:181 IDE_NO_DMA, then use put that in the flags
for the two products, and use that instead of hard-coding the product ids.
christos
