This patchset is a third one in the series created in the framework of my Baikal-T1 PCIe/eDMA-related work: [1: In-progress v3] clk: Baikal-T1 DDR/PCIe resets and some xGMAC fixes Link: https://lore.kernel.org/linux-pci/20220503205722.24755-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ [2: In-progress v2] PCI: dwc: Various fixes and cleanups Link: https://lore.kernel.org/linux-pci/20220503212300.30105-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ [3: In-progress v2] PCI: dwc: Add dma-ranges/YAML-schema/Baikal-T1 support Link: --you are looking at it-- [4: In-progress v1] dmaengine: dw-edma: Add RP/EP local DMA controllers support Link: https://lore.kernel.org/linux-pci/20220324014836.19149-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ Note it is very recommended to merge the patchsets in the same order as they are listed in the set above in order to have them applied smoothly. Nothing prevents them from being reviewed synchronously though. This series is about adding new features to the DW PCIe Host/End-point driver. First of all we start from splitting up the DT-bindings into common properties schema and generic DW PCIe bindings definition. It's done to support the generic DW PCIe Host/End-point available platforms with adding a common YAML-schema to be reused by the platform-specific DW PCIe bindings. @Rob could you please take a look at that patch? I've got a problem with dt_bindings_check-ing the schema which is likely caused by the dt-schema parser misbehaviour. After that we suggest to add a more verbose link-up log message. Really printing link generation and width would be much more informative than just "link up". Then a series of IP-core version-related patches go, like using a native FourCC version representation, adding the IP-core auto-detection, adding better structured IP-core version/type interface. After that the platform-specific host de-initialization method is introduced. A series of iATU optimizations, cleanups and new features goes afterwards. In particular we suggest to drop some redundant enumerations, add iATU regions size detection procedure and then use the regions parameters to verify the requested by the platform iATU ranges/dma-ranges settings. After that the dma-ranges property support is added for the DW PCIe Host controllers. Then a structured set of the DW PCIe RP/EP specific clocks and resets names/IDs is introduced so to be re-used by the generic and new platforms. Note it is fully coherent with the DW PCIe controller manuals (see the patch log for details). Also note the patch doesn't affect the already available DW PCIe platform-specific code since it would be too risky for my to do the corresponding conversion, but the maintainers are welcome to do that. Finally at the series closure we introduce the Baikal-T1 PCIe interface support, which uses all the recently added features including the set of the generic clocks and resets names. Link: https://lore.kernel.org/linux-pci/20220324013734.18234-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ Changelog v2: - Test the error condition first and return straight away if it comes true in the link up waiting and link state logging method (@Joe). - Move the dw_pcie_region_type enumeration removal patch to being applied before the IB/OB iATU windows setup simplification patch (@Rob). - Rename 'syscon' property to 'baikal,bt1-syscon'. (@Rob) - Move the iATU region selection procedure into a helper function (@Rob). - Rebase from kernel v5.17 onto v5.18-rc3 since the later kernel has already DT bindings converted. (@Rob) - Simplify the iATU region selection procedure by recalculating the base address only if the space is unrolled. The iATU viewport base address will be saved in the pci->atu_base field. - Move the IP-core version detection procedure call from dw_pcie_ep_init_complete() to dw_pcie_ep_init(). - Add a new patch: "PCI: dwc: Detect iATU settings after getting "addr_space" resource." - Use 'definitions' property instead of the '$defs' one. It fixes the dt-validate error: 'X is not of type array.' - Drop 'interrupts' and 'interrupt-names' property from being required for the native DW PCIe host. - Evaluate the 'snps,dw-pcie-common.yaml' schema in the 'socionext,uniphier-pcie-ep.yaml' DT-bindings since the later has platform-specific names defined. Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> Cc: Alexey Malahov <Alexey.Malahov@xxxxxxxxxxxxxxxxxxxx> Cc: Pavel Parkhomenko <Pavel.Parkhomenko@xxxxxxxxxxxxxxxxxxxx> Cc: Rob Herring <robh@xxxxxxxxxx> Cc: "Krzysztof Wilczyński" <kw@xxxxxxxxx> Cc: Frank Li <Frank.Li@xxxxxxx> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> Cc: Rob Herring <robh+dt@xxxxxxxxxx> Cc: linux-pci@xxxxxxxxxxxxxxx Cc: devicetree@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Serge Semin (17): dt-bindings: PCI: dwc: Define common and native DT bindings dt-bindings: PCI: dwc: Add Baikal-T1 PCIe Root Port bindings PCI: dwc: Add more verbose link-up message PCI: dwc: Detect iATU settings after getting "addr_space" resource PCI: dwc: Convert to using native IP-core versions representation PCI: dwc: Add IP-core version detection procedure PCI: dwc: Introduce Synopsys IP-core versions/types interface PCI: dwc: Add host de-initialization callback PCI: dwc: Drop inbound iATU types enumeration - dw_pcie_as_type PCI: dwc: Drop iATU regions enumeration - dw_pcie_region_type PCI: dwc: Simplify in/outbound iATU setup methods PCI: dwc: Add iATU regions size detection procedure PCI: dwc: Verify in/out regions against iATU constraints PCI: dwc: Check iATU in/outbound ranges setup methods status PCI: dwc: Introduce dma-ranges property support for RC-host PCI: dwc: Introduce generic platform clocks and resets sets PCI: dwc: Add Baikal-T1 PCIe controller support .../bindings/pci/baikal,bt1-pcie.yaml | 158 +++++ .../bindings/pci/fsl,imx6q-pcie.yaml | 5 +- .../bindings/pci/hisilicon,kirin-pcie.yaml | 4 +- .../bindings/pci/sifive,fu740-pcie.yaml | 4 +- .../bindings/pci/snps,dw-pcie-common.yaml | 306 +++++++++ .../bindings/pci/snps,dw-pcie-ep.yaml | 143 ++-- .../devicetree/bindings/pci/snps,dw-pcie.yaml | 189 ++++-- .../pci/socionext,uniphier-pcie-ep.yaml | 2 +- .../bindings/pci/toshiba,visconti-pcie.yaml | 2 +- drivers/pci/controller/dwc/Kconfig | 9 + drivers/pci/controller/dwc/Makefile | 1 + drivers/pci/controller/dwc/pci-keystone.c | 12 +- drivers/pci/controller/dwc/pcie-bt1.c | 639 ++++++++++++++++++ .../pci/controller/dwc/pcie-designware-ep.c | 40 +- .../pci/controller/dwc/pcie-designware-host.c | 198 ++++-- drivers/pci/controller/dwc/pcie-designware.c | 463 ++++++------- drivers/pci/controller/dwc/pcie-designware.h | 202 ++++-- drivers/pci/controller/dwc/pcie-intel-gw.c | 10 +- drivers/pci/controller/dwc/pcie-tegra194.c | 2 +- 19 files changed, 1877 insertions(+), 512 deletions(-) create mode 100644 Documentation/devicetree/bindings/pci/baikal,bt1-pcie.yaml create mode 100644 Documentation/devicetree/bindings/pci/snps,dw-pcie-common.yaml create mode 100644 drivers/pci/controller/dwc/pcie-bt1.c -- 2.35.1
