From nobody Tue Aug 11 15:30:54 2026 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4hKFvM1xXKz6nt3P for ; Tue, 11 Aug 2026 15:30:55 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "YR1" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4hKFvL6WH8z3DQg for ; Tue, 11 Aug 2026 15:30:54 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1786462254; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=X4mHpCkE4haSdXIN/jA+fd/vWA4itCnpwXFRYGKyBfg=; b=wl5yG09c22AUzOB3OQeh4IyGMttvHpV5wzeq56Hf+IJEBM7iMuOT4dUvm0MJI0+B1sjt4x LxcgkWOSkP+i0jMxkZyIMue1pOdWGHgTdynpUDMj9eh3nWEbM91FZZ4Gvog5f6m5QyJvyj 8TeQaarUuTiwmm+/WAudlmPucHaPZMxi449ZwUawBsXXkk5UOqWTx6nS+ZLQAXjiKHQbY8 CQrlOQ8UxMURFLBxMZRXDMFqF6TVoGu8cxdv2w+Ux8UUvq+ZjOEUITs6V0iv/30eddPZkJ rxZXDdXHakm1yAc57PjBR+A3ShMIWwjP++2acl48FF5wMSN3DIhLoWSd7pszxw== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1786462254; a=rsa-sha256; cv=none; b=ckagOXpndDWTEV2qhvRosEWSrZBMnt9iHMlvEPsxq/gD3MoZ6yAh6gqlLigGRbS77Ma8Q+ deZUoJE7lvZE+cmRFwpA1/VD1i35uAm26QgifP69szbm5MzOsoJd0EBPbjhgX1fEivLPNM N45SQyBbrHBqDaGRma/N/C+ESdL2SdvG6P2S9XxSTw0LjzWmVwttvp3bd2YFkOZO4GbGT5 BAS+rlEJJtjHQTyE4+ikc3G4g8bUwrO7TPXAZVgCZ95Vl2OQqOLlyGvYOGcaAiPRDWfHQ+ Esb84pHDEW5AwecLcUI0VvGGK1OLt9jL3qusOosBW7qxquarA4Uwjp6Wol/Ndw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1786462254; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=X4mHpCkE4haSdXIN/jA+fd/vWA4itCnpwXFRYGKyBfg=; b=XFCfJMG+i7cUsmPvOlkYgjgks1+Cjwq+wH98t+RLGoNentWtNrc7OsFcFZld9qv5Mm3Gta HsrHv5jfld2tlK39Phq2fwSXdqg8Omd9Fk6ltO8PIT6YPe8uT3hhQcSuItnU7hMwGNvfK7 scOwFZveHFSurFxfTwQ2xvCkQXLL/g1CkKv4sdYOz+ac0988DOI7m+WR8zmhMk0YyC67wF hgyo0pnEtylSI8WNfxrN8XbSogpiyi/44ayq5YoA7s+mr83ru8d14PyuoNfJd7SUx+mQZ3 RDA4dirO+jHs/58lkNydSyK/7LI8iiB15IbzNLZwtdtbPQjIdalBhFeg9d6JMA== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4hKFvL56tdz117S for ; Tue, 11 Aug 2026 15:30:54 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 335c0 by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Tue, 11 Aug 2026 15:30:54 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Kevin Bowling Subject: git: 0979b0430c2d - main - e1000: Disable autonomous PCH power gating after reset List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kbowling X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 0979b0430c2d728e595841ecba30b63972794fe9 Auto-Submitted: auto-generated Date: Tue, 11 Aug 2026 15:30:54 +0000 Message-Id: <6a7b402e.335c0.ac38dfb@gitrepo.freebsd.org> The branch main has been updated by kbowling: URL: https://cgit.FreeBSD.org/src/commit/?id=0979b0430c2d728e595841ecba30b63972794fe9 commit 0979b0430c2d728e595841ecba30b63972794fe9 Author: Kevin Bowling AuthorDate: 2026-08-11 15:23:51 +0000 Commit: Kevin Bowling CommitDate: 2026-08-11 15:30:27 +0000 e1000: Disable autonomous PCH power gating after reset Panther Point changed the reset value of CTRL_EXT.DPG_EN to enable autonomous power gating. Clear it after hardware reset on Panther Point and Nova Point controllers to prevent unexpected Tx/Rx hangs, packet loss, or corruption. MFC after: 1 week --- sys/dev/e1000/e1000_defines.h | 1 + sys/dev/e1000/e1000_ich8lan.c | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/sys/dev/e1000/e1000_defines.h b/sys/dev/e1000/e1000_defines.h index f1b1008764a1..9b8aca173856 100644 --- a/sys/dev/e1000/e1000_defines.h +++ b/sys/dev/e1000/e1000_defines.h @@ -66,6 +66,7 @@ /* Extended Device Control */ #define E1000_CTRL_EXT_LPCD 0x00000004 /* LCD Power Cycle Done */ +#define E1000_CTRL_EXT_DPG_EN 0x00000008 /* Dynamic Power Gating */ #define E1000_CTRL_EXT_SDP4_DATA 0x00000010 /* SW Definable Pin 4 data */ #define E1000_CTRL_EXT_SDP6_DATA 0x00000040 /* SW Definable Pin 6 data */ #define E1000_CTRL_EXT_SDP3_DATA 0x00000080 /* SW Definable Pin 3 data */ diff --git a/sys/dev/e1000/e1000_ich8lan.c b/sys/dev/e1000/e1000_ich8lan.c index 32cd5a4532fc..d454b2ede3dc 100644 --- a/sys/dev/e1000/e1000_ich8lan.c +++ b/sys/dev/e1000/e1000_ich8lan.c @@ -5101,6 +5101,14 @@ static s32 e1000_reset_hw_ich8lan(struct e1000_hw *hw) reg |= E1000_KABGTXD_BGSQLBIAS; E1000_WRITE_REG(hw, E1000_KABGTXD, reg); + /* Prevent autonomous power gating after the hardware reset. */ + if (hw->mac.type >= e1000_pch_ptp && + hw->mac.type < e1000_82575) { + reg = E1000_READ_REG(hw, E1000_CTRL_EXT); + reg &= ~E1000_CTRL_EXT_DPG_EN; + E1000_WRITE_REG(hw, E1000_CTRL_EXT, reg); + } + return E1000_SUCCESS; }