[v19,00/19] PCI: rcar-gen4: Add R-Car Gen4 PCIe support

Add R-Car S4-8 (R-Car Gen4) PCIe Host and Endpoint support.
To support them, modify PCIe DesignWare common codes.

Changes from v18:
https://lore.kernel.org/linux-pci/20230721074452.65545-1-yoshihiro.shimoda.uh@renesas.com/
 - Based on the latest pci.git / next branch and the following patches:
   [PATCH v3 0/2] Cleanup IRQ type definitions
   https://lore.kernel.org/linux-pci/20230802094036.1052472-1-dlemoal@kernel.org/
 - Drop some patches about converting "legacy" to "INTx".
 - Add detailed description in the patch 0[26]/19.
 - Add a new patch "Expose dw_pcie_write_dbi2" in the patch 11/19.
 - Revise typo in the patch 12/19.
 - Fix calling order of deinit in the patch 12/19.
 - Revise Kconfig about kernel module names in the patch 1[67]/19.
 - Rename drivers' file names in the patch 1[67]/19.
 - Some other minor change/fix in the patch 1[67]/19.

Changes from v17:m
https://lore.kernel.org/linux-pci/20230705114206.3585188-1-yoshihiro.shimoda.uh@renesas.com/
 - Based on the latest pci.git / next branch.
 - Add comments ine the commit log in the patch 01/20.
 - Drop "Implicit" from "Message Routing" in the patch 01/20.
 - Add Reviewed-by tag in the patch 0[14569]/20.
 - Fix typo in the patch 07/20.
 - Drop unnecessary description from the commit log in the patch 09/20.
 - Add clk_bulk_disable_unprepare() calling in the patch 1[78]/20.
 - Use .remove_new() in the patch 1[78]/20.
 - Add rcar_gen4_pcie_basic_deinit() and .deinit() in the patch 17/20.
 - Call rcar_gen4_pcie_basic_deinit() in .ep_deinit() in the patch 18/20.
 - Minor updates for improved code readability in the patch 1[78]/20.

Yoshihiro Shimoda (19):
  PCI: Add INTx Mechanism Messages macros
  PCI: dwc: Change arguments of dw_pcie_prog_outbound_atu()
  PCI: dwc: Add outbound MSG TLPs support
  PCI: designware-ep: Add INTx IRQs support
  PCI: dwc: endpoint: Add multiple PFs support for dbi2
  PCI: dwc: Add dw_pcie_link_set_max_link_width()
  PCI: dwc: Add missing PCI_EXP_LNKCAP_MLW handling
  PCI: tegra194: Drop PCI_EXP_LNKSTA_NLW setting
  PCI: dwc: Add EDMA_UNROLL capability flag
  PCI: dwc: Expose dw_pcie_ep_exit() to module
  PCI: dwc: Expose dw_pcie_write_dbi2() to module
  PCI: dwc: endpoint: Introduce .pre_init() and .deinit()
  dt-bindings: PCI: dwc: Update maxItems of reg and reg-names
  dt-bindings: PCI: renesas: Add R-Car Gen4 PCIe Host
  dt-bindings: PCI: renesas: Add R-Car Gen4 PCIe Endpoint
  PCI: rcar-gen4: Add R-Car Gen4 PCIe Host support
  PCI: rcar-gen4-ep: Add R-Car Gen4 PCIe Endpoint support
  MAINTAINERS: Update PCI DRIVER FOR RENESAS R-CAR for R-Car Gen4
  misc: pci_endpoint_test: Add Device ID for R-Car S4-8 PCIe controller

 .../bindings/pci/rcar-gen4-pci-ep.yaml        | 106 +++++++++
 .../bindings/pci/rcar-gen4-pci-host.yaml      | 123 +++++++++++
 .../bindings/pci/snps,dw-pcie-ep.yaml         |   4 +-
 .../devicetree/bindings/pci/snps,dw-pcie.yaml |   4 +-
 MAINTAINERS                                   |   1 +
 drivers/misc/pci_endpoint_test.c              |   4 +
 drivers/pci/controller/dwc/Kconfig            |  20 ++
 drivers/pci/controller/dwc/Makefile           |   4 +
 .../pci/controller/dwc/pcie-designware-ep.c   | 136 ++++++++++--
 .../pci/controller/dwc/pcie-designware-host.c |  52 +++--
 drivers/pci/controller/dwc/pcie-designware.c  | 156 ++++++-------
 drivers/pci/controller/dwc/pcie-designware.h  |  29 ++-
 .../controller/dwc/pcie-rcar-gen4-ep-drv.c    | 178 +++++++++++++++
 .../controller/dwc/pcie-rcar-gen4-host-drv.c  | 145 ++++++++++++
 drivers/pci/controller/dwc/pcie-rcar-gen4.c   | 208 ++++++++++++++++++
 drivers/pci/controller/dwc/pcie-rcar-gen4.h   |  44 ++++
 drivers/pci/controller/dwc/pcie-tegra194.c    |   6 -
 drivers/pci/pci.h                             |  18 ++
 18 files changed, 1107 insertions(+), 131 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pci/rcar-gen4-pci-ep.yaml
 create mode 100644 Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
 create mode 100644 drivers/pci/controller/dwc/pcie-rcar-gen4-ep-drv.c
 create mode 100644 drivers/pci/controller/dwc/pcie-rcar-gen4-host-drv.c
 create mode 100644 drivers/pci/controller/dwc/pcie-rcar-gen4.c
 create mode 100644 drivers/pci/controller/dwc/pcie-rcar-gen4.h