Stephen Warren <swarren@xxxxxxxxxxxxx> wrote @ Thu, 18 Jul 2013 22:17:21 +0200: > On 07/05/2013 04:44 AM, Hiroshi Doyu wrote: > > Register platform_devices to IOMMU dynamically via > > ops->{add,remove}_device(). > > > diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c > > > +/* > > + * ASID[0] for the system default > > + * ASID[1] for PPCS, which has SDMMC > > I have no idea what PPCS is. The patch description for 21/22 implies > much more than SDMMC is "in PPCS"... "PPCS" is all AHB bus children/(client). > > + * ASID[2][3].. open for drivers, first come, first served. > > + */ > > +enum { > > + SYSTEM_DEFAULT, > > + SYSTEM_PROTECTED, > > +}; > > Why hard-code this mapping? Can't devices be assigned to ASIDs based on > a DT property? I assume there's nothing in the SMMU HW that requires > specific ASIDs to be used? Right. Where should those policy be passed, board DT files? > I don't see anything in this series which implements the "open for > drivers" part of the description for ASID 2/3/... I expect that some smart HW(host1x) will use AS[2/3] for their smarter usage. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html