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Bodong Wang says, BlueField device is a multi-core ARM processor in a highly integrated system on chip coupled with the ConnectX interconnect controller. BlueField device can be presented in one out of two modes: - SEPARATED_HOST: ARM processors as a separated and orthogonal host like any other external host in the multi-host virtualization model. - EMBEDDED_CPU: ARM processors as Embedded CPU (EC) and part of the external hosts virtualization model. While existing driver already supports the device on separated_host mode, this patch series focus on the functionalities of embedded_cpu mode. On embedded_cpu mode, BlueField device exposes regular network controller PCI function in the BlueField host(e.g, x86). However, a separate PCI function called Embedded CPU Physical Function(ECPF) is also added to the ARM host side, where standard Linux distributions is able to run on the ARM cores. Depends on the NV configuration from firmware, ECPF can be the e-switch manager and firmware pages supplier. If ECPF is configured as e-switch manager and page supplier, it will take over the responsibilities from the PF on BlueField host includes: - Owns, controls and manages all e-switch parts, and takes e-switch traffic by default. It also should perform ENABLE_HCA for the host PF just like a PF does for its VFs. - Provides and manages the ICM host memory required for the HCA to store various contexts for itself, the PF and VFs belong the e-switch it manages. The PF on BlueField host side is still responsible for: - Control its own permanent MAC. - PCI and SRIOV configurations and perform ENABLE_HCA for its VFs. The ECPF can also retrieve information about the external host it controls, like host identifier, PCI BDF and number of virtual functions. As these parameters may be changed dynamically, an event will be triggered to the driver on ECPF side. -----BEGIN PGP SIGNATURE----- iQEcBAABAgAGBQJcZ2amAAoJEEg/ir3gV/o+lzMIALvLNUoD6pXi41MWsOwvmAHg 07mzg1N80Z66MCcFau40I8T3h9NLiRMzNtFrBNtxx+ruwKFUpAjJHjaU0sms0yQH WVjr35vk4XsZyDPSCJ4g/hCQVlgCT/1tIUvPO0YM9hjhDuVa9mT4wEpucQRDu8bO KfeXNXLDFnlWxjokhpSVj369ozh+LTv4Kzy0MBBbji97bG6MktGAT8uCimUy7wG0 7dlYimnZ1+iUD1/DZQadiLCUHUu/rTcnvF2+DcdG/nbSU8ydVLgj6vgtIfCYt4e5 kcQO5hmatnl0iJUA8GNpdHQwGjYytKneoGmIfbMAK4KjvFNF+3/8N4Bytoa5kzk= =DgTl -----END PGP SIGNATURE----- Merge tag 'mlx5-updates-2019-02-15' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux Saeed Mahameed says: ==================== Support Mellanox BlueField SmartNIC (mlx5-updates-2019-02-15) Bodong Wang says, BlueField device is a multi-core ARM processor in a highly integrated system on chip coupled with the ConnectX interconnect controller. BlueField device can be presented in one out of two modes: - SEPARATED_HOST: ARM processors as a separated and orthogonal host like any other external host in the multi-host virtualization model. - EMBEDDED_CPU: ARM processors as Embedded CPU (EC) and part of the external hosts virtualization model. While existing driver already supports the device on separated_host mode, this patch series focus on the functionalities of embedded_cpu mode. On embedded_cpu mode, BlueField device exposes regular network controller PCI function in the BlueField host(e.g, x86). However, a separate PCI function called Embedded CPU Physical Function(ECPF) is also added to the ARM host side, where standard Linux distributions is able to run on the ARM cores. Depends on the NV configuration from firmware, ECPF can be the e-switch manager and firmware pages supplier. If ECPF is configured as e-switch manager and page supplier, it will take over the responsibilities from the PF on BlueField host includes: - Owns, controls and manages all e-switch parts, and takes e-switch traffic by default. It also should perform ENABLE_HCA for the host PF just like a PF does for its VFs. - Provides and manages the ICM host memory required for the HCA to store various contexts for itself, the PF and VFs belong the e-switch it manages. The PF on BlueField host side is still responsible for: - Control its own permanent MAC. - PCI and SRIOV configurations and perform ENABLE_HCA for its VFs. The ECPF can also retrieve information about the external host it controls, like host identifier, PCI BDF and number of virtual functions. As these parameters may be changed dynamically, an event will be triggered to the driver on ECPF side. ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
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| mm | ||
| net | ||
| samples | ||
| scripts | ||
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| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.