On Thu, Dec 14, 2006 at 02:52:35AM -0700, Erik Andersen wrote: > On Thu Dec 14, 2006 at 11:23:11AM +0200, Muli Ben-Yehuda wrote: > > > I just realized that booting with "iommu=soft" makes my pcHDTV > > > HD5500 DVB cards not work. Time to go back to disabling the > > > memhole and losing 1 GB. :-( > > > > That points to a bug in the driver (likely) or swiotlb (unlikely), as > > the IOMMU in use should be transparent to the driver. Which driver is > > it? > > presumably one of cx88xx, cx88_blackbird, cx8800, cx88_dvb, > cx8802, cx88_alsa, lgdt330x, tuner, cx2341x, btcx_risc, > video_buf, video_buf_dvb, tveeprom, or dvb_pll. It seems > to take an amazing number of drivers to make these devices > actually work...
Yikes! do you know which one actually handles the DMA mappings? I suspect a missnig unmap or sync, which swiotlb requires to sync back the bounce buffer with the driver's buffer. Cheers, Muli - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
