From: Stuart Yoder stuart.yoder@nxp.com
A binding for PCI nodes has been finalized specifying how PCI device IDs can be mapped to MSI specifiers. See Documentation/devicetree/bindings/pci/pci-msi.txt in the kernel.
For ls2080a and similar Layerscape SoCs, the MSI specifier is the stream id. A programmable table (LUT) in the PCI controller defines the hardware mapping of PCI requester IDs to stream IDs.
This patch series implements support for this mapping.
Patch 1 removes the obsolete available-stream-id support. Patch 2 updates stream ID partitioning info to be current Patch 3 updates pci.h so pci_get_hose_head() is available Patch 4 implements support for programming the LUT Patch 5 implements a simple stream ID allocator for PCI Patch 6 implements a function to set msi-map properties Patch 7 implements a function to iterate over all PCI buses and set up a LUT entry and msi-map for all discovered devices
This patch series enables MSIs on ls2080a on v4.5-rc5 and later kernels. The obsolete support removed was unused in any upstream kernels.
-v2 changes -in patch 7 removed skip of the host bridge when scanning the bus
Stuart Yoder (7): armv8: ls2080a: remove obsolete stream ID partitioning support armv8: ls2080a: update stream ID partitioning info pci: make pci_get_hose_head() available to external users pci/layerscape: add support for LUT pci/layerscape: add stream ID allocator pci/layerscape: fdt: function to set msi-map entries pci/layerscape: set LUT and msi-map for discovered PCI devices
arch/arm/cpu/armv8/fsl-layerscape/fdt.c | 113 ---------- .../asm/arch-fsl-layerscape/ls2080a_stream_id.h | 55 +++-- drivers/pci/pcie_layerscape.c | 222 ++++++++++++++------ include/pci.h | 1 + 4 files changed, 187 insertions(+), 204 deletions(-)