Re: [PATCH v10 0/9] Enable designware PCI EP EDMA locally

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On Wed, May 04, 2022 at 02:18:06AM +0300, Serge Semin wrote:
> On Mon, May 02, 2022 at 07:57:52PM -0500, Frank Li wrote:
> > Default Designware EDMA just probe remotely at host side.
> > This patch allow EDMA driver can probe at EP side.
> > 
> > 1. Clean up patch
> >    dmaengine: dw-edma: Detach the private data and chip info structures
> >    dmaengine: dw-edma: Remove unused field irq in struct dw_edma_chip
> >    dmaengine: dw-edma: Change rg_region to reg_base in struct
> >    dmaengine: dw-edma: rename wr(rd)_ch_cnt to ll_wr(rd)_cnt in struct
> > 
> > 2. Enhance EDMA driver to allow prode eDMA at EP side
> >    dmaengine: dw-edma: Add support for chip specific flags
> >    dmaengine: dw-edma: Add DW_EDMA_CHIP_32BIT_DBI for chip specific flags
> > 
> > 3. Bugs fix at EDMA driver when probe eDMA at EP side
> >    dmaengine: dw-edma: Fix programming the source & dest addresses for ep
> >    dmaengine: dw-edma: Don't rely on the deprecated "direction" member
> > 
> > 4. change pci-epf-test to use EDMA driver to transfer data.
> >    PCI: endpoint: Add embedded DMA controller test
> > 
> > 5. Using imx8dxl to do test, but some EP functions still have not
> > upstream yet. So below patch show how probe eDMA driver at EP
> > controller driver.
> > https://lore.kernel.org/linux-pci/20220309120149.GB134091@thinkpad/T/#m979eb506c73ab3cfca2e7a43635ecdaec18d8097
> 
> As I have already said in my comment to v9, @Lorenzo, @Rob, @Vinod,
> my patchset:
> Link: https://lore.kernel.org/linux-pci/20220503225104.12108-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx
> is based on this one. In its turn my series depends on the other
> patchsets:
> [PATCH v3 0/4] clk: Baikal-T1 DDR/PCIe resets and some xGMAC fixes
> Link: https://lore.kernel.org/linux-pci/20220503205722.24755-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/
> [PATCH v2 00/13] PCI: dwc: Various fixes and cleanups
> Link: https://lore.kernel.org/linux-pci/20220503212300.30105-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/
> [PATCH v2 00/17] PCI: dwc: Add dma-ranges/YAML-schema/Baikal-T1 support
> Link: https://lore.kernel.org/linux-pci/20220503214638.1895-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/
> which are currently on review. I am very much eager to get my patches
> merged in before the next merge windows. But in order to preserve the
> consistency of the corresponding repo with my patchsets the repo needs
> to have the @Frank' patches. Seeing aside with @Frank's series my changes
> depend on the changes in the clk and pci subsystems, could you please
> consider choosing a single repository for merging all my and @Frank
> patches in? Since the changes mostly concern the DW PCIe controller I
> suggest to use the 'pci/dwc' branch of the
> 'kernel/git/lpieralisi/pci.git' repository. What do you think?
> @Lorenzo?
> 

Sorry for the delay in replying. I think @Frank's series will
go via the DMA engine tree, I will do my best to review your
DWC changes:

[PATCH v2 00/13] PCI: dwc: Various fixes and cleanups
Link: https://lore.kernel.org/linux-pci/20220503212300.30105-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/

but I can't guarantee they will make v5.19 and after that I will
be AFK for two months, which is not good either, I will coordinate
with Bjorn to see what can we do on this, I am sorry but that's
all I have to offer at this stage.

Thanks,
Lorenzo

> -Sergey
> 
> > 
> > 
> > Frank Li (7):
> >   dmaengine: dw-edma: Remove unused field irq in struct dw_edma_chip
> >   dmaengine: dw-edma: Detach the private data and chip info structures
> >   dmaengine: dw-edma: Change rg_region to reg_base in struct
> >     dw_edma_chip
> >   dmaengine: dw-edma: Rename wr(rd)_ch_cnt to ll_wr(rd)_cnt in struct
> >     dw_edma_chip
> >   dmaengine: dw-edma: Add support for chip specific flags
> >   dmaengine: dw-edma: Add DW_EDMA_CHIP_32BIT_DBI for chip specific flags
> >   PCI: endpoint: Enable DMA controller tests for endpoints with DMA
> >     capabilities
> > 
> > Serge Semin (2):
> >   dmaengine: dw-edma: Drop dma_slave_config.direction field usage
> >   dmaengine: dw-edma: Fix eDMA Rd/Wr-channels and DMA-direction
> >     semantics
> > 
> >  drivers/dma/dw-edma/dw-edma-core.c            | 141 +++++++++++-------
> >  drivers/dma/dw-edma/dw-edma-core.h            |  31 +---
> >  drivers/dma/dw-edma/dw-edma-pcie.c            |  83 +++++------
> >  drivers/dma/dw-edma/dw-edma-v0-core.c         |  54 ++++---
> >  drivers/dma/dw-edma/dw-edma-v0-core.h         |   4 +-
> >  drivers/dma/dw-edma/dw-edma-v0-debugfs.c      |  18 +--
> >  drivers/dma/dw-edma/dw-edma-v0-debugfs.h      |   8 +-
> >  drivers/pci/endpoint/functions/pci-epf-test.c | 108 ++++++++++++--
> >  include/linux/dma/edma.h                      |  61 +++++++-
> >  9 files changed, 323 insertions(+), 185 deletions(-)
> > 
> > -- 
> > 2.35.1
> > 



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