[GIT PULL] PCI: Support for configurable PCI endpoint

Bjorn Helgaas
2017-04-10T15:43:28Z

On Wed, Apr 05, 2017 at 02:22:20PM +0530, Kishon Vijay Abraham I wrote:
> Hi Bjorn,
>
> Please find the pull request for PCI endpoint support below. I've
> also included all the history here.

Thanks, I applied these (with v7 of the first patch) to pci/host-designware
for v4.12.

> Changes from v5:
> *) remove #syscon-cells property added in v5 and used
> of_parse_phandle_with_fixed_args
> *) fix compilation error in make.cross ARCH=blackfin that was because
> pci_endpoint_test.c driver depends on COMPILE_TEST.
>
> Changes from v4:
> *) add #syscon-cells property and used of_parse_phandle_with_args
> to perform a configuration in syscon module (as suggested by
> Rob Herring)
> *) Remove unnecessary white space.
>
> Changes from v3:
> *) fixed a typo and adapted to https://lkml.org/lkml/2017/3/13/562.
>
> Changes from v2:
> *) changed the configfs structure as suggested by Christoph Hellwig. With
> this change the framework creates configfs entry for EP function driver
> and EP controller. Previously these entries have to be created by the
> the user. (Haven't changed the epc core or epf core except for invoking
> configfs APIs to create entries for EP function driver and EP controller.
> That's mostly because the EP function device can still be created by
> directly invoking the epf core API without using configfs).
> *) Now the user has to use configfs entry 'start' to start the link.
> This was previously done by the function driver. However in the case of
> multi function EP, the function driver shouldn't start the link.
>
> Changes from v1:
> *) The preparation patches for adding EP support is removed and is sent
> separately
> *) Added device ID for DRA74x/DRA72x and used it instead of
> using "PCI_ANY_ID"
> *) Added userguide for PCI endpoint test function
>
> Major Improvements from RFC:
> *) support multi-function devices (hw supported not virtual)
> *) Access host side buffers
> *) Raise MSI interrupts
> *) Add user space program to use the host side PCI driver
> *) Adapt all other users of designware to use the new design (only
> compile tested. Since I have only dra7xx boards, the new design
> has only been tested in dra7xx. I'd require the help of others
> to test the platforms they have access to).
>
> This is based on
> git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git
> pci/host-designware
>
> Thanks
> Kishon
>
> The following changes since commit 7ea64dcf602c21b3e5062ca90111ca4459fab403:
>
> __end__ (2017-04-04 15:29:37 -0500)
>
> are available in the git repository at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/kishon/pci-endpoint.git tags/pci-endpoint-for-4.12
>
> for you to fetch changes up to a5c85ba45c9682456077d7277196e91f8ea5fd5c:
>
> ARM: DRA7: clockdomain: Change the CLKTRCTRL of CM_PCIE_CLKSTCTRL to SW_WKUP (2017-04-05 14:05:28 +0530)
>
> ----------------------------------------------------------------
> pci: endpoint: for 4.12
>
> *) Add PCI endpoint core layer
> *) Modify designware and dra7xx driver to be configured in EP mode
> *) Add a PCI endpoint *test* function driver and corresponding host
> driver
>
> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
>
> ----------------------------------------------------------------
> Kishon Vijay Abraham I (23):
> PCI: endpoint: Add EP core layer to enable EP controller and EP functions
> Documentation: PCI: Guide to use PCI Endpoint Core Layer
> PCI: endpoint: Introduce configfs entry for configuring EP functions
> Documentation: PCI: Guide to use PCI endpoint configfs
> PCI: endpoint: Create configfs entry for EPC device and EPF driver
> Documentation: PCI: Add specification for the *PCI test* function device
> PCI: endpoint: functions: Add an EP function to test PCI
> Documentation: PCI: Add binding documentation for pci-test endpoint function
> PCI: dwc: designware: Add EP mode support
> dt-bindings: PCI: Add DT bindings for PCI designware EP mode
> PCI: dwc: dra7xx: Facilitate wrapper and MSI interrupts to be enabled independently
> PCI: dwc: dra7xx: Add EP mode support
> dt-bindings: PCI: dra7xx: Add DT bindings for PCI dra7xx EP mode
> PCI: dwc: dra7xx: Workaround for errata id i870
> dt-bindings: PCI: dra7xx: Add DT bindings to enable unaligned access
> PCI: Add device IDs for DRA74x and DRA72x
> misc: Add host side PCI driver for PCI test function device
> Documentation: misc-devices: Add Documentation for pci-endpoint-test driver
> tools: PCI: Add a userspace tool to test PCI endpoint
> tools: PCI: Add sample test script to invoke pcitest
> Documentation: PCI: Add userguide for PCI endpoint test function
> MAINTAINERS: Add PCI Endpoint maintainer
> ARM: DRA7: clockdomain: Change the CLKTRCTRL of CM_PCIE_CLKSTCTRL to SW_WKUP
>
> Documentation/PCI/00-INDEX | 10 +++
> Documentation/PCI/endpoint/function/binding/pci-test.txt | 17 +++++
> Documentation/PCI/endpoint/pci-endpoint-cfs.txt | 105 ++++++++++++++++++++++++++
> Documentation/PCI/endpoint/pci-endpoint.txt | 215 ++++++++++++++++++++++++++++++++++++++++++++++++++++
> Documentation/PCI/endpoint/pci-test-function.txt | 66 ++++++++++++++++
> Documentation/PCI/endpoint/pci-test-howto.txt | 179 +++++++++++++++++++++++++++++++++++++++++++
> Documentation/devicetree/bindings/pci/designware-pcie.txt | 26 +++++--
> Documentation/devicetree/bindings/pci/ti-pci.txt | 42 +++++++++--
> Documentation/misc-devices/pci-endpoint-test.txt | 35 +++++++++
> MAINTAINERS | 9 +++
> arch/arm/mach-omap2/clockdomains7xx_data.c | 2 +-
> drivers/Makefile | 2 +
> drivers/misc/Kconfig | 7 ++
> drivers/misc/Makefile | 1 +
> drivers/misc/pci_endpoint_test.c | 534 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> drivers/pci/Kconfig | 1 +
> drivers/pci/dwc/Kconfig | 36 ++++++++-
> drivers/pci/dwc/Makefile | 5 +-
> drivers/pci/dwc/pci-dra7xx.c | 270 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
> drivers/pci/dwc/pcie-designware-ep.c | 342 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> drivers/pci/dwc/pcie-designware.c | 125 ++++++++++++++++++++++++++++++
> drivers/pci/dwc/pcie-designware.h | 112 +++++++++++++++++++++++++++
> drivers/pci/endpoint/Kconfig | 31 ++++++++
> drivers/pci/endpoint/Makefile | 7 ++
> drivers/pci/endpoint/functions/Kconfig | 12 +++
> drivers/pci/endpoint/functions/Makefile | 5 ++
> drivers/pci/endpoint/functions/pci-epf-test.c | 510 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> drivers/pci/endpoint/pci-ep-cfs.c | 509 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> drivers/pci/endpoint/pci-epc-core.c | 579 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> drivers/pci/endpoint/pci-epc-mem.c | 143 +++++++++++++++++++++++++++++++++++
> drivers/pci/endpoint/pci-epf-core.c | 351 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> include/linux/mod_devicetable.h | 10 +++
> include/linux/pci-ep-cfs.h | 41 ++++++++++
> include/linux/pci-epc.h | 144 +++++++++++++++++++++++++++++++++++
> include/linux/pci-epf.h | 162 +++++++++++++++++++++++++++++++++++++++
> include/linux/pci_ids.h | 2 +
> include/uapi/linux/Kbuild | 1 +
> include/uapi/linux/pcitest.h | 19 +++++
> tools/pci/pcitest.c | 186 +++++++++++++++++++++++++++++++++++++++++++++
> tools/pci/pcitest.sh | 56 ++++++++++++++
> 40 files changed, 4869 insertions(+), 40 deletions(-)
> create mode 100644 Documentation/PCI/endpoint/function/binding/pci-test.txt
> create mode 100644 Documentation/PCI/endpoint/pci-endpoint-cfs.txt
> create mode 100644 Documentation/PCI/endpoint/pci-endpoint.txt
> create mode 100644 Documentation/PCI/endpoint/pci-test-function.txt
> create mode 100644 Documentation/PCI/endpoint/pci-test-howto.txt
> create mode 100644 Documentation/misc-devices/pci-endpoint-test.txt
> create mode 100644 drivers/misc/pci_endpoint_test.c
> create mode 100644 drivers/pci/dwc/pcie-designware-ep.c
> create mode 100644 drivers/pci/endpoint/Kconfig
> create mode 100644 drivers/pci/endpoint/Makefile
> create mode 100644 drivers/pci/endpoint/functions/Kconfig
> create mode 100644 drivers/pci/endpoint/functions/Makefile
> create mode 100644 drivers/pci/endpoint/functions/pci-epf-test.c
> create mode 100644 drivers/pci/endpoint/pci-ep-cfs.c
> create mode 100644 drivers/pci/endpoint/pci-epc-core.c
> create mode 100644 drivers/pci/endpoint/pci-epc-mem.c
> create mode 100644 drivers/pci/endpoint/pci-epf-core.c
> create mode 100644 include/linux/pci-ep-cfs.h
> create mode 100644 include/linux/pci-epc.h
> create mode 100644 include/linux/pci-epf.h
> create mode 100644 include/uapi/linux/pcitest.h
> create mode 100644 tools/pci/pcitest.c
> create mode 100644 tools/pci/pcitest.sh
>
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