On Mon, Jul 31, 2017 at 8:23 AM, Lorenzo Pieralisi
<[email protected]> wrote:
> This patch series is v2 of a previous posting:
>
> v1: http://lkml.kernel.org/r/[email protected]
>
> v1->v2:
> - Reworked acpi_dma_get_range() flow and logs
> - Added IORT named component address limits
> - Renamed acpi_dev_get_resources() helper function
> - Rebased against v4.13-rc3
>
> -- Original cover letter --
>
> As reported in:
>
> http://lkml.kernel.org/r/cal85gma_sscwm80tkdkzqee+s1bewzdevdki1kpkmutdrms...@mail.gmail.com
>
> the bus connecting devices to an IOMMU bus can be smaller in size than
> the IOMMU input address bits which results in devices DMA HW bugs in
> particular related to IOVA allocation (ie chopping of higher address
> bits owing to system bus HW capabilities mismatch with the IOMMU).
>
> Fortunately this problem can be solved through an already present but never
> used ACPI 6.2 firmware bindings (ie _DMA object) allowing to define the DMA
> window for a specific bus in ACPI and therefore all upstream devices
> connected to it.
>
> This small patch series enables _DMA parsing in ACPI core code and
> use it in ACPI IORT code in order to detect DMA ranges for devices and
> update their data structures to make them work with their related DMA
> addressing restrictions.
>
> Cc: Will Deacon <[email protected]>
> Cc: Hanjun Guo <[email protected]>
> Cc: Feng Kan <[email protected]>
> Cc: Jon Masters <[email protected]>
> Cc: Robert Moore <[email protected]>
> Cc: Robin Murphy <[email protected]>
> Cc: Zhang Rui <[email protected]>
> Cc: "Rafael J. Wysocki" <[email protected]>
>
> Lorenzo Pieralisi (5):
> ACPICA: resource_mgr: Allow _DMA method in walk resources
> ACPI: Make acpi_dev_get_resources() method agnostic
> ACPI: Introduce DMA ranges parsing
> ACPI: Make acpi_dma_configure() DMA regions aware
> ACPI/IORT: Add IORT named component memory address limits
>
> drivers/acpi/acpica/rsxface.c | 7 ++--
> drivers/acpi/arm64/iort.c | 50 +++++++++++++++++++++++-
> drivers/acpi/resource.c | 82 ++++++++++++++++++++++++++++++---------
> drivers/acpi/scan.c | 90
> +++++++++++++++++++++++++++++++++++++++----
> include/acpi/acnames.h | 1 +
> include/acpi/acpi_bus.h | 2 +
> include/linux/acpi.h | 8 ++++
> include/linux/acpi_iort.h | 5 ++-
> 8 files changed, 211 insertions(+), 34 deletions(-)
>
> --
> 2.10.0
>
Thanks, this was tested and works on the XGene system.
Tested-by: Feng Kan <[email protected]>
