This is a final patchset in the series created in the framework of my Baikal-T1 PCIe/eDMA-related work: [1: In-progress] clk: Baikal-T1 DDR/PCIe resets and some xGMAC fixes Link: --submitted-- [2: In-progress] PCI: dwc: Various fixes and cleanups Link: --submitted-- [3: In-progress] PCI: dwc: Add dma-ranges/YAML-schema/Baikal-T1 support Link: --submitted-- [4: In-progress] dmaengine: dw-edma: Add RP/EP local DMA controllers support Link: --you are looking at it-- Note it is recommended to merge the last patchset after the former ones in order to prevent merge conflicts. @Bjorn could you merge in this patchset through your PCIe repo? After getting all the ack'es of course. Please note originally this series was self content, but due to Frank being a bit faster in his work submission I had to rebase my patchset onto his one. So now this patchset turns to be dependent on the Frank' work: Link: https://lore.kernel.org/dmaengine/20220310192457.3090-1-Frank.Li@xxxxxxx/ So please review and merge his series first before applying this one. @Frank, @Manivannan as we agreed here: Link: https://lore.kernel.org/dmaengine/20220309211204.26050-6-Frank.Li@xxxxxxx/ this series contains two patches with our joint work. Here they are: [PATCH 1/25] dmaengine: dw-edma: Drop dma_slave_config.direction field usage [PATCH 2/25] dmaengine: dw-edma: Fix eDMA Rd/Wr-channels and DMA-direction semantics @Frank, could you please pick them up and add them to your series in place of the patches: [PATCH v5 6/9] dmaengine: dw-edma: Don't rely on the deprecated "direction" member Link: https://lore.kernel.org/dmaengine/20220310192457.3090-7-Frank.Li@xxxxxxx/ [PATCH v5 5/9] dmaengine: dw-edma: Fix programming the source & dest addresses for ep Link: https://lore.kernel.org/dmaengine/20220310192457.3090-6-Frank.Li@xxxxxxx/ respectively? @Frank please don't forget to fix your series so the chip->dw field is initialized after all the probe() initializations are done. For that sake you also need to make sure that the dw_edma_irq_request(), dw_edma_channel_setup() and dw_edma_v0_core_debugfs_on() methods take dw_edma structure pointer as a parameter. Here is a short summary regarding this patchset. The series starts with fixes patches. The very first two patches have been modified based on discussion with @Frank and @Manivannan as I noted in the previous paragraph. They concern fixing the Read/Write channels xfer semantics. See the patches description for more details. After that goes the fix of the dma_direct_map_resource() method, which turned out to be not working correctly for the case of having devive.dma_range_map being non-empty (non-empty dma-ranges DT property). Then we discovered that the dw-edma-pcie.c driver incorrectly initializes the LL/DT base addresses for the platforms with not matching CPU and PCIe memory spaces. It is fixed by using the pci_bus_address() method to get a correct base address. After that you can find a series of interleaved xfers fixes. It turned out the interleaved transfers implementation didn't work quite correctly from the very beginning for instance missing src/dst addresses initialization, etc. In the framework of the next two patches we suggest to add a new platform-specific callback - pci_addrees() and use to convert the CPU address to the PCIe space address. It is at least required for the DW eDAM remote End-point setup on the platforms with not-matching address spaces. In case of the DW eDMA local RP/EP setup the conversion will be done automatically by the outbound iATU (if no DMA-bypass flag is specified for the corresponding iATU window). Then we introduce a set of patches to make the DebugFS part of the code supporting the multi-eDMA controllers platforms. It starts with several cleanup patches and is closed joining the Read/Write channels into a single DMA-device as they originally should have been. After that you can find the patches with adding the non-atomic io-64 methods usage, dropping DT-region descriptors allocation, replacing chip IDs with device name. In addition to that in order to have the eDMA embedded into the DW PCIe RP/EP supported we need to bypass the dma-ranges-based memory ranges mapping since in case of the root port DT node it's applicable for the peripheral PCIe devices only. Finally at the series closure we introduce a generic DW eDMA controller support being available in the DW PCIe Host/End-point driver. Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> Cc: Alexey Malahov <Alexey.Malahov@xxxxxxxxxxxxxxxxxxxx> Cc: Pavel Parkhomenko <Pavel.Parkhomenko@xxxxxxxxxxxxxxxxxxxx> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> Cc: Rob Herring <robh@xxxxxxxxxx> Cc: "Krzysztof Wilczyński" <kw@xxxxxxxxx> Cc: linux-pci@xxxxxxxxxxxxxxx Cc: dmaengine@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Serge Semin (25): dmaengine: dw-edma: Drop dma_slave_config.direction field usage dmaengine: dw-edma: Fix eDMA Rd/Wr-channels and DMA-direction semantics dma-direct: take dma-ranges/offsets into account in resource mapping dmaengine: Fix dma_slave_config.dst_addr description dmaengine: dw-edma: Convert ll/dt phys-address to PCIe bus/DMA address dmaengine: dw-edma: Fix missing src/dst address of the interleaved xfers dmaengine: dw-edma: Don't permit non-inc interleaved xfers dmaengine: dw-edma: Fix invalid interleaved xfers semantics dmaengine: dw-edma: Add CPU to PCIe bus address translation dmaengine: dw-edma: Add PCIe bus address getter to the remote EP glue-driver dmaengine: dw-edma: Drop chancnt initialization dmaengine: dw-edma: Fix DebugFS reg entry type dmaengine: dw-edma: Stop checking debugfs_create_*() return value dmaengine: dw-edma: Add dw_edma prefix to the DebugFS nodes descriptor dmaengine: dw-edma: Convert DebugFS descs to being kz-allocated dmaengine: dw-edma: Simplify the DebugFS context CSRs init procedure dmaengine: dw-edma: Move eDMA data pointer to DebugFS node descriptor dmaengine: dw-edma: Join Write/Read channels into a single device dmaengine: dw-edma: Use DMA-engine device DebugFS subdirectory dmaengine: dw-edma: Use non-atomic io-64 methods dmaengine: dw-edma: Drop DT-region allocation dmaengine: dw-edma: Replace chip ID number with device name dmaengine: dw-edma: Bypass dma-ranges mapping for the local setup dmaengine: dw-edma: Skip cleanup procedure if no private data found PCI: dwc: Add DW eDMA engine support drivers/dma/dw-edma/dw-edma-core.c | 249 +++++++------ drivers/dma/dw-edma/dw-edma-core.h | 10 +- drivers/dma/dw-edma/dw-edma-pcie.c | 24 +- drivers/dma/dw-edma/dw-edma-v0-core.c | 76 ++-- drivers/dma/dw-edma/dw-edma-v0-core.h | 1 - drivers/dma/dw-edma/dw-edma-v0-debugfs.c | 350 ++++++++---------- drivers/dma/dw-edma/dw-edma-v0-debugfs.h | 5 - .../pci/controller/dwc/pcie-designware-ep.c | 4 + .../pci/controller/dwc/pcie-designware-host.c | 13 +- drivers/pci/controller/dwc/pcie-designware.c | 188 ++++++++++ drivers/pci/controller/dwc/pcie-designware.h | 23 +- include/linux/dma/edma.h | 18 +- include/linux/dmaengine.h | 2 +- kernel/dma/direct.c | 2 +- 14 files changed, 598 insertions(+), 367 deletions(-) -- 2.35.1
