[PATCH v3 00/11] PCI: microchip: Partition address translations

[Daire.McNamara at microchip.com]

Hi all,

Just touching base here.  Can I take it that things are in-hand, and
this patchset is moving into the kernel or is there something I need to
do at my end?

best regards
daire

On Wed, 2023-01-11 at 12:53 +0000, daire.mcnamara at microchip.com wrote:
> From: Daire McNamara <daire.mcnamara at microchip.com>
> 
> Changes since v2:
> - Replaced GENMASK(63,0) with GENMASK_ULL(63,0) to remove warning
> - Added patch to avoid warning on cast of argument to
> devm_add_action_or_reset()
> - Added patch to enable building driver as a module
> 
> Changes since v1:
> - Removed unused variables causing compile warnings
> - Removed incorrect Signed-off-by: tags
> - Capitalised msi and msi-x
> - Capitalised FIC and respelled busses to buses
> - Capitalised all comments
> - Renamed fabric inter connect to Fabric Interface Controller as per
> PolarFire SoC TRM
> 
> Microchip PolarFire SoC is a 64-bit device and has DDR starting at
> 0x80000000 and 0x1000000000. Its PCIe rootport is connected to the
> CPU
> Coreplex via an FPGA fabric. The AXI connections between the Coreplex
> and
> the fabric are 64-bit and the AXI connections between the fabric and
> the
> rootport are 32-bit.  For the CPU CorePlex to act as an AXI-Master to
> the
> PCIe devices and for the PCIe devices to act as bus masters to DDR at
> these
> base addresses, the fabric can be customised to add/remove offsets
> for bits
> 38-32 in each direction. These offsets, if present, vary with each
> customer's design.
> 
> To support this variety, the rootport driver must know how much
> address
> translation (both inbound and outbound) is performed by a particular
> customer design and how much address translation must be provided by
> the
> rootport.
> 
> This patchset contains a parent/child dma-ranges scheme suggested by
> Rob
> Herring. It creates an FPGA PCIe parent bus which wraps the PCIe
> rootport
> and implements a parsing scheme where the root port identifies what
> address
> translations are performed by the FPGA fabric parent bus, and what
> address translations must be done by the rootport itself.
> 
> See 
> https://lore.kernel.org/linux-pci/20220902142202.2437658-1-daire.mcnamara@microchip.com/
> for the relevant previous patch submission discussion.
> 
> It also re-partitions the probe() and init() functions as suggested
> by
> Bjorn Helgaas to make them more maintainable as the init() function
> had
> become too large.
> 
> It also contains some minor fixes and clean-ups that are pre-
> requisites:
> - to align register, offset, and mask names with the hardware
> documentation
>   and to have the register definitions appear in the same order as in
> the
>   hardware documentation;
> - to harvest the MSI information from the hardware configuration
> register
>   as these depend on the FPGA fabric design and can vary with
> different
>   customer designs;
> - to clean up interrupt initialisation to make it more maintainable;
> - to fix SEC and DED interrupt handling.
> 
> I expect Conor will take the dts patch via the soc tree once the PCIe
> parts
> of the series are accepted.
> 
> Conor Dooley (1):
>   riscv: dts: microchip: add parent ranges and dma-ranges for IKRD
>     v2022.09
> 
> Daire McNamara (10):
>   PCI: microchip: Correct the DED and SEC interrupt bit offsets
>   PCI: microchip: Remove cast warning for devm_add_action_or_reset()
> arg
>   PCI: microchip: enable building this driver as a module
>   PCI: microchip: Align register, offset, and mask names with hw docs
>   PCI: microchip: Enable event handlers to access bridge and ctrl
> ptrs
>   PCI: microchip: Clean up initialisation of interrupts
>   PCI: microchip: Gather MSI information from hardware config
> registers
>   PCI: microchip: Re-partition code between probe() and init()
>   PCI: microchip: Partition outbound address translation
>   PCI: microchip: Partition inbound address translation
> 
>  .../dts/microchip/mpfs-icicle-kit-fabric.dtsi |  62 +-
>  drivers/pci/controller/Kconfig                |   2 +-
>  drivers/pci/controller/pcie-microchip-host.c  | 688 +++++++++++++---
> --
>  3 files changed, 533 insertions(+), 219 deletions(-)
> 
> 
> base-commit: 3c1f24109dfc4fb1a3730ed237e50183c6bb26b3