From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Vishwanathapura, Niranjana" Subject: [RFC v3 00/11] HFI Virtual Network Interface Controller (VNIC) Date: Tue, 7 Feb 2017 12:22:59 -0800 Message-ID: <1486498990-76562-1-git-send-email-niranjana.vishwanathapura@intel.com> Return-path: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org List-Id: linux-rdma@vger.kernel.org ChangeLog: ========= v2 => v3: a) Introduce and adopt generic RDMA netdev interface including, - having bottom hfi1 driver directly interfacing with netstack. - optimizing interface between hfi_vnic and hfi1 driver. b) Remove bitfield usage. c) Move hfi_vnic driver to drivers/infiniband/ulp folder. d) Minor fixes v2: Initial post @ https://www.spinics.net/lists/linux-rdma/msg44110.html Description: ============ Intel Omni-Path Host Fabric Interface (HFI) Virtual Network Interface Controller (VNIC) feature supports Ethernet functionality over Omni-Path fabric by encapsulating the Ethernet packets between HFI nodes. The patterns of exchanges of Omni-Path encapsulated Ethernet packets involves one or more virtual Ethernet switches overlaid on the Omni-Path fabric topology. A subset of HFI nodes on the Omni-Path fabric are permitted to exchange encapsulated Ethernet packets across a particular virtual Ethernet switch. The virtual Ethernet switches are logical abstractions achieved by configuring the HFI nodes on the fabric for header generation and processing. In the simplest configuration all HFI nodes across the fabric exchange encapsulated Ethernet packets over a single virtual Ethernet switch. A virtual Ethernet switch, is effectively an independent Ethernet network. The configuration is performed by an Ethernet Manager (EM) which is part of the trusted Fabric Manager (FM) application. HFI nodes can have multiple VNICs each connected to a different virtual Ethernet switch. The below diagram presents a case of two virtual Ethernet switches with two HFI nodes. +-------------------+ | Subnet/ | | Ethernet | | Manager | +-------------------+ / / / / / / / / +-----------------------------+ +------------------------------+ | Virtual Ethernet Switch | | Virtual Ethernet Switch | | +---------+ +---------+ | | +---------+ +---------+ | | | VPORT | | VPORT | | | | VPORT | | VPORT | | +--+---------+----+---------+-+ +-+---------+----+---------+---+ | \ / | | \ / | | \/ | | / \ | | / \ | +-----------+------------+ +-----------+------------+ | VNIC | VNIC | | VNIC | VNIC | +-----------+------------+ +-----------+------------+ | HFI | | HFI | +------------------------+ +------------------------+ Intel HFI VNIC software design is presented in the below diagram. HFI VNIC functionality has a HW dependent component and a HW independent component. The support has been added for IB device to allocate and free the RDMA netdev devices. The RDMA netdev supports interfacing with the network stack thus creating standard network interfaces. HFI_VNIC is an RDMA netdev device type. The HW dependent VNIC functionality is part of the HFI1 driver. It implements the verbs to allocate and free the HFI_VNIC RDMA netdev. It involves HW resource allocation/management for VNIC functionality. It interfaces with the network stack and implements the required net_device_ops functions. It expects Omni-Path encapsulated Ethernet packets in the transmit path and provides HW access to them. It strips the Omni-Path header from the received packets before passing them up the network stack. It also implements the RDMA netdev control operations. The HFI VNIC module implements the HW independent VNIC functionality. It consists of two parts. The VNIC Ethernet Management Agent (VEMA) registers itself with IB core as an IB client and interfaces with the IB MAD stack. It exchanges the management information with the Ethernet Manager (EM) and the VNIC netdev. The VNIC netdev part allocates and frees the HFI_VNIC RDMA netdev devices. It overrides the net_device_ops functions set by HW dependent VNIC driver where required to accommodate any control operation. It also handles the encapsulation of Ethernet packets with an Omni-Path header in the transmit path. For each VNIC interface, the information required for encapsulation is configured by the EM via VEMA MAD interface. It also passes any control information to the HW dependent driver by invoking the RDMA netdev control operations. +-------------------+ +----------------------+ | | | Linux | | IB MAD | | Network | | | | Stack | +-------------------+ +----------------------+ | | | | | | +----------------------------+ | | | | | HFI VNIC Module | | | (HFI VNIC RDMA Netdev | | | & EMA functions) | | | | | +----------------------------+ | | | | | +------------------+ | | IB core | | +------------------+ | | | | | +--------------------------------------------+ | | | HFI1 Driver with VNIC support | | | +--------------------------------------------+ Vishwanathapura, Niranjana (11): IB/hfi-vnic: Virtual Network Interface Controller (VNIC) documentation IB/hfi-vnic: Virtual Network Interface Controller (VNIC) interface IB/hfi-vnic: Virtual Network Interface Controller (VNIC) netdev IB/hfi-vnic: VNIC Ethernet Management (EM) structure definitions IB/hfi-vnic: VNIC statistics support IB/hfi-vnic: VNIC MAC table support IB/hfi-vnic: VNIC Ethernet Management Agent (VEMA) interface IB/hfi-vnic: VNIC Ethernet Management Agent (VEMA) function IB/hfi1: HFI_VNIC RDMA netdev support IB/hfi1: Virtual Network Interface Controller (VNIC) HW support IB/hfi1: VNIC SDMA support Documentation/infiniband/hfi_vnic.txt | 102 ++ MAINTAINERS | 7 + drivers/infiniband/Kconfig | 1 + drivers/infiniband/hw/hfi1/Makefile | 2 +- drivers/infiniband/hw/hfi1/aspm.h | 15 +- drivers/infiniband/hw/hfi1/chip.c | 293 +++++- drivers/infiniband/hw/hfi1/chip.h | 4 +- drivers/infiniband/hw/hfi1/debugfs.c | 8 +- drivers/infiniband/hw/hfi1/driver.c | 77 +- drivers/infiniband/hw/hfi1/file_ops.c | 27 +- drivers/infiniband/hw/hfi1/hfi.h | 57 +- drivers/infiniband/hw/hfi1/init.c | 39 +- drivers/infiniband/hw/hfi1/mad.c | 10 +- drivers/infiniband/hw/hfi1/pio.c | 19 +- drivers/infiniband/hw/hfi1/pio.h | 8 +- drivers/infiniband/hw/hfi1/sysfs.c | 4 +- drivers/infiniband/hw/hfi1/user_exp_rcv.c | 8 +- drivers/infiniband/hw/hfi1/user_pages.c | 5 +- drivers/infiniband/hw/hfi1/verbs.c | 8 +- drivers/infiniband/hw/hfi1/vnic.h | 184 ++++ drivers/infiniband/hw/hfi1/vnic_main.c | 909 +++++++++++++++++ drivers/infiniband/hw/hfi1/vnic_sdma.c | 323 ++++++ drivers/infiniband/ulp/Makefile | 1 + drivers/infiniband/ulp/hfi_vnic/Kconfig | 8 + drivers/infiniband/ulp/hfi_vnic/Makefile | 7 + drivers/infiniband/ulp/hfi_vnic/hfi_vnic_encap.c | 475 +++++++++ drivers/infiniband/ulp/hfi_vnic/hfi_vnic_encap.h | 485 +++++++++ drivers/infiniband/ulp/hfi_vnic/hfi_vnic_ethtool.c | 205 ++++ .../infiniband/ulp/hfi_vnic/hfi_vnic_internal.h | 329 ++++++ drivers/infiniband/ulp/hfi_vnic/hfi_vnic_netdev.c | 388 +++++++ drivers/infiniband/ulp/hfi_vnic/hfi_vnic_vema.c | 1071 ++++++++++++++++++++ .../infiniband/ulp/hfi_vnic/hfi_vnic_vema_iface.c | 390 +++++++ include/rdma/ib_verbs.h | 27 + include/rdma/opa_hfi.h | 147 +++ include/rdma/opa_port_info.h | 4 +- 35 files changed, 5533 insertions(+), 114 deletions(-) create mode 100644 Documentation/infiniband/hfi_vnic.txt create mode 100644 drivers/infiniband/hw/hfi1/vnic.h create mode 100644 drivers/infiniband/hw/hfi1/vnic_main.c create mode 100644 drivers/infiniband/hw/hfi1/vnic_sdma.c create mode 100644 drivers/infiniband/ulp/hfi_vnic/Kconfig create mode 100644 drivers/infiniband/ulp/hfi_vnic/Makefile create mode 100644 drivers/infiniband/ulp/hfi_vnic/hfi_vnic_encap.c create mode 100644 drivers/infiniband/ulp/hfi_vnic/hfi_vnic_encap.h create mode 100644 drivers/infiniband/ulp/hfi_vnic/hfi_vnic_ethtool.c create mode 100644 drivers/infiniband/ulp/hfi_vnic/hfi_vnic_internal.h create mode 100644 drivers/infiniband/ulp/hfi_vnic/hfi_vnic_netdev.c create mode 100644 drivers/infiniband/ulp/hfi_vnic/hfi_vnic_vema.c create mode 100644 drivers/infiniband/ulp/hfi_vnic/hfi_vnic_vema_iface.c create mode 100644 include/rdma/opa_hfi.h -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html