On Mon, 12 Sep 2016 20:58:42 +0200 Tomasz Nowicki <tn@xxxxxxxxxxxx> wrote: > On 12.09.2016 20:54, Tomasz Nowicki wrote: > > IORT shows representation of IO topology for ARM based systems. > > It describes how various components are connected together on > > parent-child basis e.g. PCI RC -> SMMU -> ITS. Also see IORT spec. > > http://infocenter.arm.com/help/topic/com.arm.doc.den0049b/DEN0049B_IO_Remapping_Table.pdf > > > > Initial support allows to detect IORT table presence and save its > > root pointer obtained through acpi_get_table(). The pointer validity > > depends on acpi_gbl_permanent_mmap because if acpi_gbl_permanent_mmap > > is not set while using IORT nodes we would dereference unmapped pointers. > > > > For the aforementioned reason call acpi_iort_init() from acpi_init() > > which guarantees acpi_gbl_permanent_mmap to be set at that point. > > > > Add generic helpers which are helpful for scanning and retrieving > > information from IORT table content. List of the most important helpers: > > - iort_find_dev_node() finds IORT node for a given device > > - iort_node_map_rid() maps device RID and returns IORT node which provides > > final translation > > > > IORT support is placed under drivers/acpi/arm64/ new directory due to its > > ARM64 specific nature. The code there is considered only for ARM64. > > The long term plan is to keep all ARM64 specific tables support > > in this place e.g. GTDT table. > > > > Signed-off-by: Tomasz Nowicki <tn@xxxxxxxxxxxx> > > Acked-by: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> > > Reviewed-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx> > > Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> > > Hi Marc, > > Series with updated patch 1 can be found: > https://github.com/semihalf-nowicki-tomasz/linux.git (its-acpi-v11) > > Sorry for zillions of patch updates... I've swapped the two patches and pushed the result out again, but from now on, please send updates on top of irq/irqchip-4.9. Thanks, M. -- Without deviation from the norm, progress is not possible. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
