Date: Mon, 25 Apr 2022 14:34:49 +0000 From: bugzilla-noreply@freebsd.org To: usb@FreeBSD.org Subject: [Bug 261912] XHCI fails to attach to array on startup Message-ID: <bug-261912-19105-rAJLdfhash@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-261912-19105@https.bugs.freebsd.org/bugzilla/> References: <bug-261912-19105@https.bugs.freebsd.org/bugzilla/>
next in thread | previous in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D261912 --- Comment #11 from Alexander Motin <mav@FreeBSD.org> --- I can't say anything about USB devices detection side, but there are plenty= of interesting things going on PCI side here. First, this port seems to be Thunderbolt, not plain USB, so when you hot-plug the USB, system actually detects PCI hot-plug of several levels of PCI hierarchy with XHCI controlle= r at the end. A pleasant surprise is that all resource allocation succeeds in case of hot-plug, it seems BIOS through SMI or something else pre-allocated the resources before OS touches it, so everything just works. In case of boot with the USB devices already connected (contrary to what I expect) resources below the top level bridge are not allocated by BIOS and I see plenty of allocation errors. Considering the XHCI controller is detect= ed I guess none of the errors are fatal, but I can only speculate that something= may still be not right there. Sean, are there any BIOS options on the system like "fast boot" or somethin= g, that could control resource allocation for "unnecesary" devices during boot? --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-261912-19105-rAJLdfhash>