Date: Thu, 23 Feb 2023 00:29:43 GMT From: Kevin Bowling <kbowling@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: b0b1fa9efed8 - stable/13 - e1000: Fix packet loss on 11th gen and later Message-ID: <202302230029.31N0Thin072522@gitrepo.freebsd.org>
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The branch stable/13 has been updated by kbowling: URL: https://cgit.FreeBSD.org/src/commit/?id=b0b1fa9efed8d3a4aeb8e365c4f3356de9cc0f6d commit b0b1fa9efed8d3a4aeb8e365c4f3356de9cc0f6d Author: Kevin Bowling <kbowling@FreeBSD.org> AuthorDate: 2023-02-09 00:32:54 +0000 Commit: Kevin Bowling <kbowling@FreeBSD.org> CommitDate: 2023-02-23 00:29:33 +0000 e1000: Fix packet loss on 11th gen and later Ungate DMA clock on TGP and later to avoid packet loss. A similar fix appears in Linux 639e298f432fb058a9496ea16863f53b1ce935fe This may be needed as far back as SPT but no confirmation from intel or other OS yet. Obtained from: OpenBSD (if_em_hw.c 1.116) Sponsored by: BBOX.io (cherry picked from commit 56365902147791994157c3a8f75784dafd46dbd8) --- sys/dev/e1000/e1000_ich8lan.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/sys/dev/e1000/e1000_ich8lan.c b/sys/dev/e1000/e1000_ich8lan.c index f74ef5f9c7b3..86b3d1194edd 100644 --- a/sys/dev/e1000/e1000_ich8lan.c +++ b/sys/dev/e1000/e1000_ich8lan.c @@ -5174,6 +5174,13 @@ static s32 e1000_init_hw_ich8lan(struct e1000_hw *hw) snoop = (u32) ~(PCIE_NO_SNOOP_ALL); e1000_set_pcie_no_snoop_generic(hw, snoop); + /* ungate DMA clock to avoid packet loss */ + if (mac->type >= e1000_pch_tgp) { + uint32_t fflt_dbg = E1000_READ_REG(hw, E1000_FFLT_DBG); + fflt_dbg |= (1 << 12); + E1000_WRITE_REG(hw, E1000_FFLT_DBG, fflt_dbg); + } + ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT); ctrl_ext |= E1000_CTRL_EXT_RO_DIS; E1000_WRITE_REG(hw, E1000_CTRL_EXT, ctrl_ext);
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