Date: Mon, 17 Mar 2025 22:41:20 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 285492] NVIDIA Connect X-7 NIC:The mlx5(3.7.1) driver that comes along with 14.2 detects MFA1A00 cable as a 100G-KR4 cable incorrectly Message-ID: <bug-285492-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285492 Bug ID: 285492 Summary: NVIDIA Connect X-7 NIC:The mlx5(3.7.1) driver that comes along with 14.2 detects MFA1A00 cable as a 100G-KR4 cable incorrectly Product: Base System Version: 14.2-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: nirmalanand.jebakumar@gmail.com Created attachment 258755 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=258755&action=edit Cable specification I am running FreeBSD 14.2 with a NVIDIA Connect X-7 NIC. The mlx5(3.7.1) driver that comes along with the base kernel image detects MFA1A00 cable as a 100G-KR4 cable incorrectly. But the earlier generation of its NIC, Connect X-6/Connect X-4 detects it correctly as a 100G-SR4 cable. Raised an enterprise support case with NVIDIA and they replied mentioning that the mlx5 driver on FreeBSD is developed and maintained by the FreeBSD community and asked me to reach out here. I brought up Ubuntu 24.X on the same system and with the same firmware version the base PF driver detects the cable as a 100G-SR4 cable as expected. Upon a quick scan of the Linux mlx5 driver, the following snippet from the below patch helped identify the right connector type: https://github.com/torvalds/linux/commit/5b4793f817452e478442684e6bba85bddb5a9345 MLX5_GET(ptys_reg, out, connector_type); Cable spec is attached for reference. Request the experts in the community to work on the official mlx5 driver patch for FreeBSD. Regards, Nirmal -- You are receiving this mail because: You are the assignee for the bug.home | help
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