Messages in this thread |  | | From | Frederic Barrat <> | Subject | [PATCH 00/13] New driver to support OpenCAPI devices on POWER9 | Date | Mon, 18 Dec 2017 16:21:13 +0100 |
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This series adds support for Open Coherent Accelerator (ocxl) devices on POWER9 processor. OpenCAPI is a consortium developing the specifications for an interface between processors and accelerators, allowing sharing the host memory with the accelerators, using virtual addresses.
The OpenCAPI device can also have its own local memory and provide access to the host, though it is not supported by that series.
The OpenCAPI specification is processor agnostic, but this series adds support specifically for powerpc.
Even though the underlying transport is not PCI, the firmware abstracts the hardware like a PCI host bridge and Linux sees the OpenCAPI devices as PCI devices. So a lot of existing infrastructure and commands can be reused.
Patches 1-5: add the platform-specific services needed by the driver Patches 6-10: driver code Patch 11: small correction to existing cxl driver Patch 12: documentation
Current limitations, that will be addressed in later patches: - no capability to trigger a reset of the opencapi adapter - no support for the 'wake_host_thread' command - no support for adapters with a dual-link connection (none exists yet) - no access to the adapter-local memory
Many people contributed directly or indirectly, from the software, hardware and bringup teams. In particular Andrew Donnellan and Alastair D'Silva, who are developing the related firmware and library.
Feedback welcome!
Frederic Barrat (13): powerpc/powernv: Introduce new PHB type for opencapi links powerpc/powernv: Set correct configuration space size for opencapi devices powerpc/powernv: Add opal calls for opencapi powerpc/powernv: Add platform-specific services for opencapi powerpc/powernv: Capture actag information for the device ocxl: Driver code for 'generic' opencapi devices ocxl: Add AFU interrupt support ocxl: Add a kernel API for other opencapi drivers ocxl: Add trace points ocxl: Add Makefile and Kconfig cxl: Remove support for "Processing accelerators" class ocxl: Documentation ocxl: add MAINTAINERS entry
Documentation/accelerators/ocxl.rst | 151 +++++ Documentation/ioctl/ioctl-number.txt | 1 + MAINTAINERS | 12 + arch/powerpc/include/asm/opal-api.h | 5 +- arch/powerpc/include/asm/opal.h | 6 + arch/powerpc/include/asm/pnv-ocxl.h | 43 ++ arch/powerpc/platforms/powernv/Makefile | 1 + arch/powerpc/platforms/powernv/npu-dma.c | 2 +- arch/powerpc/platforms/powernv/ocxl.c | 519 ++++++++++++++++++ arch/powerpc/platforms/powernv/opal-wrappers.S | 3 + arch/powerpc/platforms/powernv/pci-ioda.c | 56 +- arch/powerpc/platforms/powernv/pci.c | 4 + arch/powerpc/platforms/powernv/pci.h | 8 +- drivers/misc/Kconfig | 1 + drivers/misc/Makefile | 1 + drivers/misc/cxl/pci.c | 2 - drivers/misc/ocxl/Kconfig | 25 + drivers/misc/ocxl/Makefile | 10 + drivers/misc/ocxl/afu_irq.c | 209 +++++++ drivers/misc/ocxl/config.c | 729 +++++++++++++++++++++++++ drivers/misc/ocxl/context.c | 275 ++++++++++ drivers/misc/ocxl/file.c | 438 +++++++++++++++ drivers/misc/ocxl/link.c | 654 ++++++++++++++++++++++ drivers/misc/ocxl/main.c | 40 ++ drivers/misc/ocxl/ocxl_internal.h | 138 +++++ drivers/misc/ocxl/pasid.c | 114 ++++ drivers/misc/ocxl/pci.c | 592 ++++++++++++++++++++ drivers/misc/ocxl/sysfs.c | 150 +++++ drivers/misc/ocxl/trace.c | 13 + drivers/misc/ocxl/trace.h | 189 +++++++ include/misc/ocxl-config.h | 52 ++ include/misc/ocxl.h | 221 ++++++++ include/uapi/misc/ocxl.h | 56 ++ 33 files changed, 4702 insertions(+), 18 deletions(-) create mode 100644 Documentation/accelerators/ocxl.rst create mode 100644 arch/powerpc/include/asm/pnv-ocxl.h create mode 100644 arch/powerpc/platforms/powernv/ocxl.c create mode 100644 drivers/misc/ocxl/Kconfig create mode 100644 drivers/misc/ocxl/Makefile create mode 100644 drivers/misc/ocxl/afu_irq.c create mode 100644 drivers/misc/ocxl/config.c create mode 100644 drivers/misc/ocxl/context.c create mode 100644 drivers/misc/ocxl/file.c create mode 100644 drivers/misc/ocxl/link.c create mode 100644 drivers/misc/ocxl/main.c create mode 100644 drivers/misc/ocxl/ocxl_internal.h create mode 100644 drivers/misc/ocxl/pasid.c create mode 100644 drivers/misc/ocxl/pci.c create mode 100644 drivers/misc/ocxl/sysfs.c create mode 100644 drivers/misc/ocxl/trace.c create mode 100644 drivers/misc/ocxl/trace.h create mode 100644 include/misc/ocxl-config.h create mode 100644 include/misc/ocxl.h create mode 100644 include/uapi/misc/ocxl.h
-- 2.14.1
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