Re: [UPDATE PATCH V10 2/8] ACPI: Add new IORT functions to support MSI domain handling

[Tomasz Nowicki]

On 07.09.2016 13:58, Tomasz Nowicki wrote:
> For ITS, MSI functionality consists on building domain stack and
> during that process we need to reference to domain stack components
> e.g. before we create new DOMAIN_BUS_PCI_MSI domain we need to specify
> its DOMAIN_BUS_NEXUS parent domain. In order to manage that process
> properly, maintain list which elements contain domain token
> (unique for MSI domain stack) and ITS ID: iort_register_domain_token()
> and iort_deregister_domain_token(). Then retrieve domain token
> any time later with ITS ID being key off: iort_find_domain_token().
> With domain token and domain type we are able to find corresponding
> IRQ domain.
>
> Since IORT is prepared to describe MSI domain on a per-device basis,
> use existing IORT helpers and implement two calls:
> 1. iort_msi_map_rid() to map MSI RID for a device
> 2. iort_get_device_domain() to find domain token for a device
>
> Signed-off-by: Tomasz Nowicki <tn@xxxxxxxxxxxx>
> Reviewed-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
>
> Conflicts:
> 	drivers/acpi/arm64/iort.c

Rebase leftover ^^^,  sorry.

Tomasz