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| author | Kevin Bowling <kbowling@FreeBSD.org> | 2023-02-09 00:32:54 +0000 |
|---|---|---|
| committer | Kevin Bowling <kbowling@FreeBSD.org> | 2023-02-23 00:29:58 +0000 |
| commit | e7de5b89b72da29933f0e7f2852b33b1ba0eb442 (patch) | |
| tree | 5fe9bd91d0d6269ad7f1c60a369c3ad5fbbb9c1f | |
| parent | 0aacd70843949f793a8cc9cbba76472137644032 (diff) | |
| download | src-e7de5b89b72da29933f0e7f2852b33b1ba0eb442.tar.gz src-e7de5b89b72da29933f0e7f2852b33b1ba0eb442.zip | |
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)
| -rw-r--r-- | sys/dev/e1000/e1000_ich8lan.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/dev/e1000/e1000_ich8lan.c b/sys/dev/e1000/e1000_ich8lan.c index 7d079ee5d1b3..9893aa413b2c 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); |