From nobody Tue Aug 18 01:29:59 2026 X-Original-To: dev-commits-src-branches@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 4hPBvq6GlQz6phJ7 for ; Tue, 18 Aug 2026 01:29:59 +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 "YR2" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4hPBvq4mlQz4Jnf for ; Tue, 18 Aug 2026 01:29:59 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1787016599; 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=gnFhQ1ePd0pbcn3f+pep/i7OTmpFyxDkZIHz8cO2ptY=; b=iqWgg1f06gL+VQOFQVuMa2Wc1+/OuxRgIQ1PDtBaAYVqaBpEnWNQCRQSpwF5NMSbvUIivw XcWzyXKjg4af52M5AyRus//058EsD89ITa3Fo16aBULhOAdO3dMEsqJKpRggUzy8K94bgI mebs1qc+cfxX+dyZA8rLSandSHNYFezz0JbcA/6eEFue0ozN0nVM9ThHvaEpd9Hvquv1gZ RUIpux3J5xKJyMdd/lhkgkmwbVbjWd1iUfSwzapEm3LY42o/5lK8UA2zLIEOsF38CH1wbk jVBmDuNCP0iQ5EI3O30ZkjtuK1HInANpBzZ4Petwna81EhHAqslPSUP7mOvklQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1787016599; a=rsa-sha256; cv=none; b=Ru5uTi5yzlO2N4kl3TvdO+wCCgDqoL42WKV/xmQDdVLF6jUkLDnfsMRCSwtWv/rz8+EDjj WyGIvvX67iPC91tkM0GAshOwHAbkd/XJBQgpqP5uwTqgCyHbU5fCRGXJp9LZqDamqYYs88 X7gMhmlgwmcu52DJwV9sivWKEL9vWh2/pNCK+44elakFSz17IyomORuZ46i4Yhvdhij9rU OVY7Ow/B7W6+KvNhZwf+HkuXOD+XYJi+FP7DKG1pMpxoD/KaXY6Q/oclLbzl+zjF9Koswc 6Jc5iH7T0EkBHKT7MTh2VcgA5etT3l4hL92p9Xnz3hDnAsKFuuVaYt/4awwpJg== 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=1787016599; 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=gnFhQ1ePd0pbcn3f+pep/i7OTmpFyxDkZIHz8cO2ptY=; b=JKafcuCHz0bQe6pdnwwZFAJIYlS+P4vIYPGGGT+9x/CYTF8By+DDd5E83aWZR5cQu7UKqN Xovsjl18dJIG/TnjGw9MiCE4VCSu8KGDLtkUcu/dQx1SZZSSFzH6KAW9lacviJH2LcxRpG t90pbxsNyq7j34ge78FEo2Y6xgd/hR1xORqKwjhj1xXfDdwLaCn31k2Umrx78CCJ/I0egB TpMcAxLWfdyin/AqvlRsEiwg7hSr4KlwZw3B+J+91BsWtmiuAlpREJ/c3DzJj7I60YSguv T+UuchtiWN9EYUB2UeV9+3GcwDhDZdbafD1SSZ8aaueTrdoOqvR4jZjH33sBcg== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4hPBvq3bltz7Y7 for ; Tue, 18 Aug 2026 01:29:59 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 18213 by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Tue, 18 Aug 2026 01:29:59 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Kevin Bowling Subject: git: 6000eb72a5ba - stable/15 - e1000: Disable autonomous PCH power gating after reset List-Id: Commits to the stable branches of the FreeBSD src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-branches List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-branches@freebsd.org Sender: owner-dev-commits-src-branches@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/stable/15 X-Git-Reftype: branch X-Git-Commit: 6000eb72a5ba44069bf5290a3504db892cb6dfdb Auto-Submitted: auto-generated Date: Tue, 18 Aug 2026 01:29:59 +0000 Message-Id: <6a83b597.18213.40c37cb8@gitrepo.freebsd.org> The branch stable/15 has been updated by kbowling: URL: https://cgit.FreeBSD.org/src/commit/?id=6000eb72a5ba44069bf5290a3504db892cb6dfdb commit 6000eb72a5ba44069bf5290a3504db892cb6dfdb Author: Kevin Bowling AuthorDate: 2026-08-11 15:23:51 +0000 Commit: Kevin Bowling CommitDate: 2026-08-18 01:29:43 +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. (cherry picked from commit 0979b0430c2d728e595841ecba30b63972794fe9) --- 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 3102505faa15..f1a5fe59bb81 100644 --- a/sys/dev/e1000/e1000_ich8lan.c +++ b/sys/dev/e1000/e1000_ich8lan.c @@ -5094,6 +5094,14 @@ 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; }