Re: [PATCH v7 00/18] Implement NTB Controller using multiple PCI EP

Lorenzo Pieralisi
2020-10-20T13:18:53Z

On Tue, Oct 20, 2020 at 01:45:45PM +0530, Kishon Vijay Abraham I wrote:
> Hi,
>
> On 05/10/20 11:27 am, Kishon Vijay Abraham I wrote:
> > Hi Jon Mason, Allen Hubbe, Dave Jiang,
> >
> > On 30/09/20 9:05 pm, Kishon Vijay Abraham I wrote:
> >> This series is about implementing SW defined Non-Transparent Bridge (NTB)
> >> using multiple endpoint (EP) instances. This series has been tested using
> >> 2 endpoint instances in J7 connected to J7 board on one end and DRA7 board
> >> on the other end. However there is nothing platform specific for the NTB
> >> functionality.
> >
> > This series has two patches that adds to drivers/ntb/ directory.
> > [PATCH v7 15/18] NTB: Add support for EPF PCI-Express Non-Transparent
> > Bridge and [PATCH v7 16/18] NTB: tool: Enable the NTB/PCIe link on the
> > local or remote side of bridge.
> >
> > If you can review and Ack the above patches, Lorenzo can queue it along
> > with the rest of the series.
> >
> > Thanks for your help in advance.
>
> Gentle ping on this series.

I am not queueing any more patches for this merge window - we postpone
this series to v5.11 and in the interim it would be good to define some
possible users.

Thanks,
Lorenzo

> Thanks
> Kishon
> >
> > Best Regards,
> > Kishon
> >
> >>
> >> This was presented in Linux Plumbers Conference. Link to presentation
> >> and video can be found @ [1]
> >>
> >> RFC patch series can be found @ [2]
> >> v1 patch series can be found @ [3]
> >> v2 patch series can be found @ [4]
> >> v3 patch series can be found @ [5]
> >> v4 patch series can be found @ [6]
> >> v5 patch series can be found @ [7]
> >> v6 patch series can be found @ [8]
> >>
> >> Changes from v6:
> >> 1) Fixed issues when multiple NTB devices are creating using multiple
> >> functions
> >> 2) Fixed issue with writing scratchpad register
> >> 3) Created a video demo @ [9]
> >>
> >> Changes from v5:
> >> 1) Fixed a formatting issue in Kconfig pointed out by Randy
> >> 2) Checked for Error or Null in pci_epc_add_epf()
> >>
> >> Changes from v4:
> >> 1) Fixed error condition checks in pci_epc_add_epf()
> >>
> >> Changes from v3:
> >> 1) Fixed Documentation edits suggested by Randy Dunlap <rdunlap@infradead.org>
> >>
> >> Changes from v2:
> >> 1) Add support for the user to create sub-directory of 'EPF Device'
> >> directory (for endpoint function specific configuration using
> >> configfs).
> >> 2) Add documentation for NTB specific attributes in configfs
> >> 3) Check for PCI_CLASS_MEMORY_RAM (PCIe class) before binding ntb_hw_epf
> >> driver
> >> 4) Other documentation fixes
> >>
> >> Changes from v1:
> >> 1) As per Rob's comment, removed support for creating NTB function
> >> device from DT
> >> 2) Add support to create NTB EPF device using configfs (added support in
> >> configfs to associate primary and secondary EPC with EPF.
> >>
> >> Changes from RFC:
> >> 1) Converted the DT binding patches to YAML schema and merged the
> >> DT binding patches together
> >> 2) NTB documentation is converted to .rst
> >> 3) One HOST can now interrupt the other HOST using MSI-X interrupts
> >> 4) Added support for teardown of memory window and doorbell
> >> configuration
> >> 5) Add support to provide support 64-bit memory window size from
> >> DT
> >>
> >> [1] -> https://linuxplumbersconf.org/event/4/contributions/395/
> >> [2] -> http://lore.kernel.org/r/20190926112933.8922-1-kishon@ti.com
> >> [3] -> http://lore.kernel.org/r/20200514145927.17555-1-kishon@ti.com
> >> [4] -> http://lore.kernel.org/r/20200611130525.22746-1-kishon@ti.com
> >> [5] -> http://lore.kernel.org/r/20200904075052.8911-1-kishon@ti.com
> >> [6] -> http://lore.kernel.org/r/20200915042110.3015-1-kishon@ti.com
> >> [7] -> http://lore.kernel.org/r/20200918064227.1463-1-kishon@ti.com
> >> [8] -> http://lore.kernel.org/r/20200924092519.17082-1-kishon@ti.com
> >> [9] -> https://youtu.be/dLKKxrg5-rY
> >>
> >> Kishon Vijay Abraham I (18):
> >> Documentation: PCI: Add specification for the *PCI NTB* function
> >> device
> >> PCI: endpoint: Make *_get_first_free_bar() take into account 64 bit
> >> BAR
> >> PCI: endpoint: Add helper API to get the 'next' unreserved BAR
> >> PCI: endpoint: Make *_free_bar() to return error codes on failure
> >> PCI: endpoint: Remove unused pci_epf_match_device()
> >> PCI: endpoint: Add support to associate secondary EPC with EPF
> >> PCI: endpoint: Add support in configfs to associate two EPCs with EPF
> >> PCI: endpoint: Add pci_epc_ops to map MSI irq
> >> PCI: endpoint: Add pci_epf_ops for epf drivers to expose function
> >> specific attrs
> >> PCI: endpoint: Allow user to create sub-directory of 'EPF Device'
> >> directory
> >> PCI: cadence: Implement ->msi_map_irq() ops
> >> PCI: cadence: Configure LM_EP_FUNC_CFG based on epc->function_num_map
> >> PCI: endpoint: Add EP function driver to provide NTB functionality
> >> PCI: Add TI J721E device to pci ids
> >> NTB: Add support for EPF PCI-Express Non-Transparent Bridge
> >> NTB: tool: Enable the NTB/PCIe link on the local or remote side of
> >> bridge
> >> Documentation: PCI: Add configfs binding documentation for pci-ntb
> >> endpoint function
> >> Documentation: PCI: Add userguide for PCI endpoint NTB function
> >>
> >> .../PCI/endpoint/function/binding/pci-ntb.rst | 38 +
> >> Documentation/PCI/endpoint/index.rst | 3 +
> >> .../PCI/endpoint/pci-endpoint-cfs.rst | 10 +
> >> .../PCI/endpoint/pci-ntb-function.rst | 351 +++
> >> Documentation/PCI/endpoint/pci-ntb-howto.rst | 160 ++
> >> drivers/misc/pci_endpoint_test.c | 1 -
> >> drivers/ntb/hw/Kconfig | 1 +
> >> drivers/ntb/hw/Makefile | 1 +
> >> drivers/ntb/hw/epf/Kconfig | 6 +
> >> drivers/ntb/hw/epf/Makefile | 1 +
> >> drivers/ntb/hw/epf/ntb_hw_epf.c | 755 ++++++
> >> drivers/ntb/test/ntb_tool.c | 1 +
> >> .../pci/controller/cadence/pcie-cadence-ep.c | 60 +-
> >> drivers/pci/endpoint/functions/Kconfig | 12 +
> >> drivers/pci/endpoint/functions/Makefile | 1 +
> >> drivers/pci/endpoint/functions/pci-epf-ntb.c | 2114 +++++++++++++++++
> >> drivers/pci/endpoint/functions/pci-epf-test.c | 13 +-
> >> drivers/pci/endpoint/pci-ep-cfs.c | 176 +-
> >> drivers/pci/endpoint/pci-epc-core.c | 130 +-
> >> drivers/pci/endpoint/pci-epf-core.c | 105 +-
> >> include/linux/pci-epc.h | 39 +-
> >> include/linux/pci-epf.h | 28 +-
> >> include/linux/pci_ids.h | 1 +
> >> 23 files changed, 3934 insertions(+), 73 deletions(-)
> >> create mode 100644 Documentation/PCI/endpoint/function/binding/pci-ntb.rst
> >> create mode 100644 Documentation/PCI/endpoint/pci-ntb-function.rst
> >> create mode 100644 Documentation/PCI/endpoint/pci-ntb-howto.rst
> >> create mode 100644 drivers/ntb/hw/epf/Kconfig
> >> create mode 100644 drivers/ntb/hw/epf/Makefile
> >> create mode 100644 drivers/ntb/hw/epf/ntb_hw_epf.c
> >> create mode 100644 drivers/pci/endpoint/functions/pci-epf-ntb.c
> >>