[v15,00/22] PCI: rcar-gen4: Add R-Car Gen4 PCIe support

Message

Yoshihiro Shimoda May 9, 2023, 12:41 p.m. UTC

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

Changes from v14:
https://lore.kernel.org/linux-pci/[e-mail]/
 - Based on next-20230508.
 - (no change, JFYI) Based on the following cleanups patches:
   [PATCH v4 00/14] PCI: dwc: Relatively simple fixes and cleanups
   https://lore.kernel.org/linux-pci/[e-mail]/
 - Add Reviewed-by from Serge in the patch {4,5,15,}/21.
 - Drop PCI_EXP_LNKCAP_MLW handling of pcie-tegra194.c because
   pcie-designware.c takes care of it.
 - Change subjects in the patch {5,6,7,8,10}/21.
 - Drop dw_pcie_prog_ep_outbound_atu().
 - Modify dw_pcie_link_set_max_link_width() to improve code readability.
 - Move the retrain code to .start_link().
 - Fix some minor issues.

Changes from v13:
https://lore.kernel.org/linux-pci/[e-mail]/
 - Based on next-20230424.
 - (no change, JFYI) Based on the following cleanups patches:
   [PATCH v4 00/14] PCI: dwc: Relatively simple fixes and cleanups
   https://lore.kernel.org/linux-pci/[e-mail]/
 - Fix typos in the patch 4/22 and 5/22.
 - Reviewed-by or Acked-by from Manivannan in the patch {4,5,10,16,18,21,22}/22.
 - Acked-by from Jesper in the patch 5/22.
 - Acked-by from Rob in the patch 16/22.
 - Merge the patch 8/22 to the 6/22.
 - Change the subject in the patch 9/22.
 - Fix incorrect implementation in the patch 11/22.
 - Fix issues in the patch 12/22.
 - Revise the descriptions in the patch 1[34569]/22.
 - Update copyright in the patch 1[78]/22.
 - Fix examples in the patch 1[78]/22.
 - Fix some minor issues in the patch 22/22.

Yoshihiro Shimoda (22):
  PCI: Add PCI_EXP_LNKCAP_MLW macros
  PCI: Add PCI_HEADER_TYPE_MULTI_FUNC
  PCI: Add INTx Mechanism Messages macros
  PCI: Rename PCI_EPC_IRQ_LEGACY to PCI_EPC_IRQ_INTX
  PCI: dwc: Rename "legacy_irq" to "INTx_irq"
  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: Add dw_pcie_link_set_max_link_width()
  PCI: dwc: Modify PCIE_PORT_LINK_CONTROL handling
  PCI: dwc: Add dw_pcie_link_set_max_cap_width()
  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: Introduce .ep_pre_init() and .ep_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        |  98 +++++++++
 .../bindings/pci/rcar-gen4-pci-host.yaml      | 109 ++++++++++
 .../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 +
 .../pci/controller/cadence/pcie-cadence-ep.c  |   2 +-
 drivers/pci/controller/dwc/Kconfig            |  18 ++
 drivers/pci/controller/dwc/Makefile           |   4 +
 drivers/pci/controller/dwc/pci-dra7xx.c       |   2 +-
 drivers/pci/controller/dwc/pci-imx6.c         |   4 +-
 drivers/pci/controller/dwc/pci-keystone.c     |   2 +-
 .../pci/controller/dwc/pci-layerscape-ep.c    |   4 +-
 drivers/pci/controller/dwc/pcie-artpec6.c     |   2 +-
 .../pci/controller/dwc/pcie-designware-ep.c   |  97 +++++++--
 .../pci/controller/dwc/pcie-designware-host.c |  52 +++--
 .../pci/controller/dwc/pcie-designware-plat.c |   4 +-
 drivers/pci/controller/dwc/pcie-designware.c  | 160 ++++++++-------
 drivers/pci/controller/dwc/pcie-designware.h  |  33 ++-
 drivers/pci/controller/dwc/pcie-keembay.c     |   2 +-
 drivers/pci/controller/dwc/pcie-qcom-ep.c     |   4 +-
 .../pci/controller/dwc/pcie-rcar-gen4-ep.c    | 166 +++++++++++++++
 .../pci/controller/dwc/pcie-rcar-gen4-host.c  | 141 +++++++++++++
 drivers/pci/controller/dwc/pcie-rcar-gen4.c   | 190 ++++++++++++++++++
 drivers/pci/controller/dwc/pcie-rcar-gen4.h   |  46 +++++
 drivers/pci/controller/dwc/pcie-tegra194.c    |   8 +-
 drivers/pci/controller/dwc/pcie-uniphier-ep.c |   2 +-
 drivers/pci/controller/pcie-rcar-ep.c         |   2 +-
 drivers/pci/controller/pcie-rockchip-ep.c     |   2 +-
 drivers/pci/endpoint/functions/pci-epf-test.c |  12 +-
 drivers/pci/pci.h                             |  18 ++
 drivers/pci/probe.c                           |   2 +-
 drivers/pci/quirks.c                          |   4 +-
 include/linux/pci-epc.h                       |   4 +-
 include/uapi/linux/pci_regs.h                 |   7 +
 35 files changed, 1061 insertions(+), 153 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.c
 create mode 100644 drivers/pci/controller/dwc/pcie-rcar-gen4-host.c
 create mode 100644 drivers/pci/controller/dwc/pcie-rcar-gen4.c
 create mode 100644 drivers/pci/controller/dwc/pcie-rcar-gen4.h