Bug 1735 - Intel: backport adding a driver support for Intel PCIe Non-Transparent bridge for Sapphire Rapids
Summary: Intel: backport adding a driver support for Intel PCIe Non-Transparent bridge...
Status: RESOLVED FIXED
Alias: None
Product: ANCK 5.10 Dev
Classification: ANCK
Component: drivers (show other bugs) drivers
Version: unspecified
Hardware: x86_64 Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: Guanjun
QA Contact: shuming
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-07-26 16:42 UTC by zhengwu
Modified: 2023-01-17 14:48 UTC (History)
2 users (show)

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Description zhengwu intel_group 2022-07-26 16:42:25 UTC 
Description of problem:

backport adding a driver support for Intel PCIe Non-Transparent bridge(NTB) for Sapphire Rapids, this patch is from upstream kernel(75b6f6487ced).

Intel PCIe Non-Transparent bridge(NTB) is a point to point platform interconnect over PCIe.
https://www.kernel.org/doc/html/v5.10/driver-api/ntb.html
Non-Transparent bridge(NTB) hardware cards are needed for connecting point to point platform interconnect over PCIe.

How reproducible:

steps to Reproduce:
1.Using CEM to Occulink adapter(NTB hardware cards) for connecting two Sapphire Rapids.
2.set the right NTB port for matching the pcie port of CEM to Occulink adapter in BIOS.
3.Afer NTB hardware is ready, please check the following link to test NTB in Linux.
https://github.com/davejiang/linux/wiki/Intel-NTB-Startup-Guide

Actual results:


Expected results:


Additional info:
Comment 1 zhengwu intel_group 2022-08-17 17:24:24 UTC 
According to the review of maintainer, add the new patch of ntb: intel: fix port config status offset for SPR. upstream ID is d5081bf5dcfb.
Comment 2 maqiao alibaba_cloud_group 2023-01-17 14:48:11 UTC 
merged: https://gitee.com/anolis/cloud-kernel/pulls/579