[PATCH v10 0/8] Add endpoint driver for R-Car PCIe controller

[Lad Prabhakar]

Hi All,

This patch series adds support for endpoint driver for R-Car PCIe controller on
R-Car/RZ-G2x SoC's, this also extends the epf framework to handle multiple windows
supported by the controller for mapping PCI address locally.

Note:
The rockchip/dwc endpoint drivers are build tested only and was tested on cadence
by Kishon (https://lkml.org/lkml/2020/5/6/1535)

Changes for v10:
* Rebased patches on top of pci/rcar branch on tree
  https://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git
* Made pci_epc_get_matching_window() as static
* Included Ack's from Kishon for patches 4/8 and 5/8
* Included Reviewed-by tag from Shimoda-san for patches 4/8 and 5/8

Changes for v9:
* Rebased patches on top of v5.7.rc1
* Replaced mdelay(1) with usleep_range(1000, 1001) in rcar_pcie_ep_assert_intx()
* Added a check for max_functions read from DT to restrict with
  RCAR_EPC_MAX_FUNCTIONS
* Replaced MSICAP0_MMENUM with MSICAP0_MMESE
* Retry ioremap for other windows on failure in pci_epc_mem_alloc_addr()
* Fixed looping for number windows in pci_epc_mem_exit()
* Set maximum to 1 for max-functions in DT binding (I have restored the acks
  from  Rob and Shimoda-san)
* Sorted the entry in MAINTAINERS

Changes for v8:
* Dropped adding R8A774C0 (0x002d) pci-id in pci_ids.h
* Fixed typo in commit message for patch 2/8
* Reworded commit message for patch 5/8 as suggested by Bjorn
* Split up patch to add pci_epc_mem_init() interface to add page_size argument
  as suggested by Bjorn.

Changes for v7:
* Fixed review comments pointed by Shimoda-san
  1] Made DT bindings dual licensed, added Shimoda-san as maintainer and fixed
     the example as its built with #{address,size}-cells = <1>. I have still
     restored the Ack from Rob and Shimoda-san with these changes.
  2] Split up the patches so that they can be picked up by respective subsystem
     patches 1/4-9/11 are now part of this series.
  3] Dropped altering a comment in pci-epc.h
  4] Used a local variable align_size in pci_epc_mem_alloc_addr() so that size
     variable doesn't get overwritten in the loop.
  5] Replaced i-=1 with i--
  6] Replaced rcar with R-Car in patch subject and description.
  7] Set MACCTLR in init() callback

Changes for v6:
1] Rebased patches on endpoint branch of https://git.kernel.org/pub/
   scm/linux/kernel/git/lpieralisi/pci.git/
2] Fixed review comments from Shimoda-san
   a] Made sure defconfig changes were in separate patch
   b] Created rcar_pcie_host/rcar_pcie_ep structures
   c] Added pci-id for R8A774C0
   d] Added entry in MAINTAINERS for dt-binding
   e] Dropped unnecessary braces
3] Added support for msi.

Changes for v5:
1] Rebased patches on next branch of https://git.kernel.org/pub/scm/
   linux/kernel/git/helgaas/pci.git
2] Fixed review comments reported by Kishon while fetching the matching
   window in function pci_epc_get_matching_window()
3] Fixed review comments reported by Bjorn
   a] Split patch up first patch so that its easier to review and incremental
   b] Fixed typos
4] Included Reviewed tag from Rob for the dt-binding patch
5] Fixed issue reported by Nathan for assigning variable to itself

Changes for v4:
1] Fixed dtb_check error reported by Rob
2] Fixed review comments reported by Kishon
   a] Dropped pci_epc_find_best_fit_window()
   b] Fixed initializing mem ptr in __pci_epc_mem_init()
   c] Dropped map_size from pci_epc_mem_window structure

Changes for v3:
1] Fixed review comments from Bjorn and Kishon.
3] Converted to DT schema

Changes for v2:
1] Fixed review comments from Biju for dt-bindings to include an example
   for a tested platform.
2] Fixed review comments from Kishon to extend the features of outbound
   regions in epf framework.
3] Added support to parse outbound-ranges in OF.

Lad Prabhakar (8):
  PCI: rcar: Rename pcie-rcar.c to pcie-rcar-host.c
  PCI: rcar: Move shareable code to a common file
  PCI: rcar: Fix calculating mask for PCIEPAMR register
  PCI: endpoint: Pass page size as argument to pci_epc_mem_init()
  PCI: endpoint: Add support to handle multiple base for mapping
    outbound memory
  dt-bindings: PCI: rcar: Add bindings for R-Car PCIe endpoint
    controller
  PCI: rcar: Add endpoint mode support
  MAINTAINERS: Add file patterns for rcar PCI device tree bindings

 .../devicetree/bindings/pci/rcar-pci-ep.yaml  |   77 +
 MAINTAINERS                                   |    1 +
 drivers/pci/controller/Kconfig                |   18 +
 drivers/pci/controller/Makefile               |    3 +-
 .../pci/controller/cadence/pcie-cadence-ep.c  |    2 +-
 .../pci/controller/dwc/pcie-designware-ep.c   |   16 +-
 drivers/pci/controller/pcie-rcar-ep.c         |  563 ++++++++
 drivers/pci/controller/pcie-rcar-host.c       | 1130 +++++++++++++++
 drivers/pci/controller/pcie-rcar.c            | 1268 +----------------
 drivers/pci/controller/pcie-rcar.h            |  140 ++
 drivers/pci/controller/pcie-rockchip-ep.c     |    2 +-
 drivers/pci/endpoint/pci-epc-mem.c            |  204 ++-
 include/linux/pci-epc.h                       |   38 +-
 13 files changed, 2150 insertions(+), 1312 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pci/rcar-pci-ep.yaml
 create mode 100644 drivers/pci/controller/pcie-rcar-ep.c
 create mode 100644 drivers/pci/controller/pcie-rcar-host.c
 create mode 100644 drivers/pci/controller/pcie-rcar.h

-- 
2.17.1