This patchset is a second 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/20220324012524.16784-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ [3: In-progress v1] PCI: dwc: Add dma-ranges/YAML-schema/Baikal-T1 support Link: https://lore.kernel.org/linux-pci/20220324013734.18234-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ [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 placed in the list above in order to prevent possible merge/build conflicts. Nothing prevents them from being reviewed synchronously though. As it can be easily inferred from the patchset title, this series is about the DW PCIe Root Port/End-point driver fixes and the code cleanups, where fixes come before the cleanup patches. The patchset starts with adding the stop_link() platform-specific method invocation in case of the PCIe host probe procedure errors. It has been missing in the cleanup-on-error path of the DW PCIe Host initialization method. After that there is a patch which fixes the host own cfg-space accessors for the case of the platform-specific DBI implementation. Third the unrolled CSRs layout is added to the iATU disable procedure. Fourth the disable iATU procedure is fixed to be called only for the internal ATU as being specific for the internal ATU implementation. Last but no least the outbound iATU extended region setup procedure is fixed to have the INCREASE_REGION_SIZE flag set based on the limit-address - not the region size one. Afterwards there is a series of cleanups. It concerns the changes like adding braces to the multi-line if-else constructions, trailing new-lines to the print format-string, dropping unnecessary version checking, and various code simplifications and optimizations. New features like adding two-level DT bindings abstraction, adding better structured IP-core version interface, adding iATU regions size detection and the PCIe regions verification procedure, adding dma-ranges support, introducing a set of generic platform clocks and resets and finally adding Baikal-T1 PCIe interface support will be submitted in the next part of the series. Link: https://lore.kernel.org/linux-pci/20220324012524.16784-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/ Changelog v2: - Fix the end address of the example in the patch log with the INCREASE_REGION_SIZE flag usage fixup. It should be 0x1000FFFF and not 0x0000FFFF (@Manivannan). - Add the cleanup-on-error path to the dw_pcie_ep_init() function. (@Manivannan) 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: linux-pci@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Serge Semin (13): PCI: dwc: Stop link in the host init error and de-initialization PCI: dwc: Don't use generic IO-ops for DBI-space access PCI: dwc: Add unroll iATU space support to the regions disable method PCI: dwc: Disable outbound windows for controllers with iATU PCI: dwc: Set INCREASE_REGION_SIZE flag based on limit address PCI: dwc: Add braces to the multi-line if-else statements PCI: dwc: Add trailing new-line literals to the log messages PCI: dwc: Discard IP-core version checking on unrolled iATU detection PCI: dwc: Convert Link-up status method to using dw_pcie_readl_dbi() PCI: dwc: Deallocate EPC memory on EP init error PCI: dwc-plat: Simplify the probe method return value handling PCI: dwc-plat: Discard unused regmap pointer PCI: dwc-plat: Drop dw_plat_pcie_of_match forward declaration .../pci/controller/dwc/pcie-designware-ep.c | 22 +++++-- .../pci/controller/dwc/pcie-designware-host.c | 66 +++++++++++++++---- .../pci/controller/dwc/pcie-designware-plat.c | 13 ++-- drivers/pci/controller/dwc/pcie-designware.c | 48 +++++++++----- 4 files changed, 109 insertions(+), 40 deletions(-) -- 2.35.1
