[v23,00/16] PCI: dwc: rcar-gen4: Add R-Car Gen4 PCIe support

Message

Yoshihiro Shimoda Sept. 26, 2023, 12:24 p.m. UTC

Add R-Car S4-8 (R-Car Gen4) PCIe controller for both host and endpoint modes.
To support them, modify PCIe DesignWare common codes.

Changes from v22:
https://lore.kernel.org/linux-pci/[e-mail]/
 - Based on the latest pci.git / next branch.
 - Add Reviewed-by in the patch 12/16.
 - Move a few endpoint related code from the patch 13/16 to 14/16.
 - Change subjects in the patch 1[34]/16.
 - Modify the code for readability in the patch 14/16.

Changes from v21:
https://lore.kernel.org/linux-pci/[e-mail]/
 - Based on the latest pci.git / next branch.
 - Fix -Wmissing-prototypes warnings that was reported by kernel test robot:
   https://lore.kernel.org/linux-pci/[e-mail]/

Changes from v20 + squash patches:
https://lore.kernel.org/linux-pci/[e-mail]/
https://lore.kernel.org/linux-pci/[e-mail]/
 - Based on the latest pci.git / next branch.
 - Cherry-picked almost all patches from the pci.git / controller/rcar branch
   for squashing.
  - But, drop the following patches which are related to INTx.
     eb185e1e628a PCI: designware-ep: Add INTx IRQs support
     5d0e51f85b23 PCI: dwc: Add outbound MSG TLPs support
     4758bef61cc2 PCI: dwc: Change arguments of dw_pcie_prog_outbound_atu()
     44938b13046b PCI: Add INTx Mechanism Messages macros
 - Add a new macro T_PVPERL in the patch 12/16.
 - Merge pcie-rcar-gen4-{ep,host}-drv.c and pcie-rcar-gen4.h files into
   pcie-rcar-gen4.c.
 - Add CONFIG_PCIE_RCAR_GEN4_HOST config.
 - Fix some comments.
 - Change return type of rcar_gen4_pcie_speed_change().
 - Add registers' full names as comments.
 - Rename function names of rcar_gen4_{add,remove}_pcie_ep() to
   rcar_gen4_{add,remove}_dw_pcie_ep() for consistency.

Yoshihiro Shimoda (16):
  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: add T_PVPERL macro
  PCI: dwc: rcar-gen4: Add R-Car Gen4 PCIe controller support for host
    mode
  PCI: dwc: rcar-gen4: Add endpoint mode 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        | 115 ++++
 .../bindings/pci/rcar-gen4-pci-host.yaml      | 127 +++++
 .../bindings/pci/snps,dw-pcie-common.yaml     |   4 +-
 .../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            |  25 +
 drivers/pci/controller/dwc/Makefile           |   1 +
 .../pci/controller/dwc/pcie-designware-ep.c   |  45 +-
 drivers/pci/controller/dwc/pcie-designware.c  | 102 ++--
 drivers/pci/controller/dwc/pcie-designware.h  |   8 +-
 drivers/pci/controller/dwc/pcie-rcar-gen4.c   | 526 ++++++++++++++++++
 drivers/pci/controller/dwc/pcie-tegra194.c    |   6 -
 drivers/pci/pci.h                             |   3 +
 15 files changed, 906 insertions(+), 69 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.c