On Fri, Jan 29, 2021 at 06:12:56PM +0530, 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 was presented in Linux Plumbers Conference. Link to presentation > and video can be found @ [1] > Created a video demo @ [9] > > 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] > v7 patch series can be found @ [10] > v8 patch series can be found @ [11] > v9 patch series can be found @ [12] > > Changes from v9: > 1) Fix the typos pointed out Bjorn Helgaas > 2) Added the received Reviewed-by tags. > > Changes from v8: > 1) Do not use devm_request_irq/devm_free_irq as pci_free_irq_vectors() > has to be used after free_irq > 2) Drop "NTB: tool: Enable the NTB/PCIe link on the local or remote side > of bridge" as there is a debugfs entry to enable the link > > Changes from v7: > 1) Used values stored in ctrl_reg_bar, peer_spad_reg_bar and db_reg_bar > instead of hardcoded values in pci_iomap of ntb_hw_epf.c driver > > 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@xxxxxxxxxxxxx> > > 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@xxxxxx > [3] -> http://lore.kernel.org/r/20200514145927.17555-1-kishon@xxxxxx > [4] -> http://lore.kernel.org/r/20200611130525.22746-1-kishon@xxxxxx > [5] -> http://lore.kernel.org/r/20200904075052.8911-1-kishon@xxxxxx > [6] -> http://lore.kernel.org/r/20200915042110.3015-1-kishon@xxxxxx > [7] -> http://lore.kernel.org/r/20200918064227.1463-1-kishon@xxxxxx > [8] -> http://lore.kernel.org/r/20200924092519.17082-1-kishon@xxxxxx > [9] -> https://youtu.be/dLKKxrg5-rY > [10] -> http://lore.kernel.org/r/20200930153519.7282-1-kishon@xxxxxx > [11] -> http://lore.kernel.org/r/20201111153559.19050-1-kishon@xxxxxx > [12] -> http://lore.kernel.org/r/20210104152909.22038-1-kishon@xxxxxx > > Kishon Vijay Abraham I (17): > 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 > 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 | 348 +++ > Documentation/PCI/endpoint/pci-ntb-howto.rst | 161 ++ > 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 | 754 ++++++ > .../pci/controller/cadence/pcie-cadence-ep.c | 60 +- > drivers/pci/endpoint/functions/Kconfig | 13 + > drivers/pci/endpoint/functions/Makefile | 1 + > drivers/pci/endpoint/functions/pci-epf-ntb.c | 2128 +++++++++++++++++ > 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 + > 22 files changed, 3945 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 Hi Kishon, it looks like this series did not make it to linux-pci therefore I can't apply it, not sure what happened, I need to check. Lorenzo
