Re: Intel 82801H SATA interrupt issues

[Emmanuel Dreyfus <manu%netbsd.org@localhost>]

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;
+       } 
+



-- 
Emmanuel Dreyfus
manu%netbsd.org@localhost