This series adds support for NVLink, a high speed interconnect that is used in conjunction with PCI-E to create a high bandwidth interface between GPU and CPU.
As the NVLink hardware interface is similar to IBM's existing PCIe host bridges no major new kernel or user interfaces are added by this patch series. Instead the links are treated as standard PCIe devices sitting under a NVLink specific PHB type. This allows existing kernel interfaces to be used for the management and control of the links. Alistair Popple (3): Revert "powerpc/pci: Remove unused struct pci_dn.pcidev field" powerpc: Add __raw_rm_writeq() function platforms/powernv: Add support for Nvlink NPUs arch/powerpc/include/asm/io.h | 11 + arch/powerpc/include/asm/pci-bridge.h | 1 + arch/powerpc/include/asm/pci.h | 4 + arch/powerpc/platforms/powernv/Makefile | 2 +- arch/powerpc/platforms/powernv/npu-dma.c | 348 ++++++++++++++++++++++++++++++ arch/powerpc/platforms/powernv/pci-ioda.c | 149 +++++++++++-- arch/powerpc/platforms/powernv/pci.c | 4 + arch/powerpc/platforms/powernv/pci.h | 19 ++ 8 files changed, 515 insertions(+), 23 deletions(-) create mode 100644 arch/powerpc/platforms/powernv/npu-dma.c -- 2.1.4 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
