Date: Mon, 31 Jul 2023 19:35:06 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 272780] genet: General question of DMA alignment requirement for tx/rx_buf Message-ID: <bug-272780-227-62dRmFcG7i@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-272780-227@https.bugs.freebsd.org/bugzilla/> References: <bug-272780-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D272780 --- Comment #2 from Mike Karels <karels@freebsd.org> --- At the time this driver was done, IP headers had to be 4-byte-aligned on ar= m64. The two-byte adjustment was to make the Ethernet header end on a 4-byte alignment. I'm not aware of anything that forces this through a bounce buf= fer. If there is such a thing, this should probably be reconsidered. Apparently now IP and TCP headers do not need to be 4-byte aligned, although I don't k= now specifics. --=20 You are receiving this mail because: You are the assignee for the bug.=
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