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diff --git a/docs/n1sdp/pcie-sr-iov.rst b/docs/n1sdp/pcie-sr-iov.rst deleted file mode 100755 index ceeb48f..0000000 --- a/docs/n1sdp/pcie-sr-iov.rst +++ /dev/null @@ -1,53 +0,0 @@ -PCIe SR-IOV on Neoverse N1 SDP -============================== - -.. section-numbering:: - :suffix: . - -.. contents:: - - -Introduction ------------- -The Neoverse N1 System Development Platform (N1SDP) supports two PCIe root ports each -supporting the standard PCIe features including the Single Root I/O Virtualization (SR-IOV) -feature. This document gives an overview of how to enable and test the SR-IOV feature on -N1SDP. - -Note: -Due to the PCIe limitations in N1SDP platform (`pcie-support`_), the SR-IOV feature has not been completely validated. - -Pre-Requisite -------------- - 1. Latest software stack synced by following steps given in `user-guide`_ - 2. Ensure that the Linux tree in the synced workspace contains the SR-IOV and PCI ACS override patches. This should have been already applied when syncing the code. - -Steps to verify SR-IOV ----------------------- - 1. Add kernel config CONFIG_IXGBEVF=y to linux/arch/arm64/configs/defconfig file. This is required to enable drivers for the mentioned Intel card. - 2. Build the software stack and flash the Ubuntu image onto the boot device. Do initial boot of the board which installs Ubuntu and perform second boot which boots Ubuntu kernel. - 3. Login to target Ubuntu console and edit the file /etc/default/grub. Add pcie_acs_override=id:13b5:0100 option to the GRUB_CMDLINE_LINUX_DEFAULT. Save this file and run update-grub command. - 4. Reboot the board from Ubuntu console using reboot now command. - 5. Now Linux probes and assigns separate IOMMU groups for all PCIe devices. - 6. Virtual functions can be enabled from sysfs using following command: - - *echo 63 > /sys/bus/pci/devices/0001\:01\:00.0/sriov_numvfs* - - Note that in test environment the Intel card's ethernet port 0 is identified in Segment:1 Bus:1 Dev:0 Function:0 - -Limitations ------------ - 1. SR-IOV feature is only supported in CCIX slot and not in the PCIe slots. This is due to the - on-board PCIe switch not supporting the ARI capability to which the PCIe slots are connected. - 2. Only Intel X540-T2 card has been validated for the SR-IOV feature. - -References ----------- -- http://infocenter.arm.com/help/topic/com.arm.doc.101489_0000_01_en/arm_neoverse_n1_system_development_platform_technical_reference_manual_101489_0000_01_en.pdf - ----------- - -*Copyright (c) 2020, Arm Limited. All rights reserved.* - -.. _user-guide: user-guide.rst -.. _pcie-support: pcie-support.rst |