From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by smtp.lore.kernel.org (Postfix) with ESMTP id A792FC5CFC1 for ; Mon, 17 Aug 2026 06:49:47 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id ECDC04028E; Mon, 17 Aug 2026 08:49:46 +0200 (CEST) Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) by mails.dpdk.org (Postfix) with ESMTP id C4B5C4021F for ; Mon, 17 Aug 2026 08:49:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1786949386; x=1818485386; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=t0Vt1RVCYPJCpM5klbuAniBxlr+H1FpYLzLwpCbWeh0=; b=LgkmrUGd00RWPfI+JMPq9mkSc9LHShjrAv54kg4g0uBu91RKIM8lGNtk KgDxOeTQ/ty6Nw1B8IH/dotE0rkGPOXpqFAJdMvPLJ4Z8wiKawxTHNjKu gxD6FICO9L5/kRiFZ3N7zQtTy4kx3Dexi77AF3kdzawcGtppBHaSB54Td JNtS2MYS+ajonQEFpNT6PRzsTNpHSrkfPOAi0RTJlarDhdHmx4uzcajzb 0cSt4OlwYEh7awjTZZMD0UBt+nE4FQbr2DUV6nKfzv8biuOnuxSATr0xQ Ir0/qt51Cx2+IxaMnMdXkOZK6/JUx6k1YmA3trApQg/nTNZ/6MkdiPm/H w==; X-CSE-ConnectionGUID: N0llhLu3QP6vjmon/vBGrQ== X-CSE-MsgGUID: yWYFgTWMTb27sDwSZ5/nrg== X-IronPort-AV: E=McAfee;i="6800,10657,11877"; a="91095591" X-IronPort-AV: E=Sophos;i="6.25,228,1779174000"; d="scan'208";a="91095591" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Aug 2026 23:49:45 -0700 X-CSE-ConnectionGUID: A8gORoOuSU2+qSWnyS/yRw== X-CSE-MsgGUID: Q6+hKHGHTZqk0LOVWPOq+Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,228,1779174000"; d="scan'208";a="262195928" Received: from pae-14.iind.intel.com ([10.190.203.153]) by fmviesa008.fm.intel.com with ESMTP; 16 Aug 2026 23:49:43 -0700 From: Anurag Mandal To: dev@dpdk.org Cc: bruce.richardson@intel.com, vladimir.medvedkin@intel.com, ciara.loftus@intel.com, Anurag Mandal Subject: [PATCH v3 0/7] net/iavf: harden reset recovery and data path on link flap Date: Mon, 17 Aug 2026 06:48:39 +0000 Message-Id: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org V3-changes: - Addressed Ciara Loftus's review comments on Fixes tag - Added missing watchdog enable in Patch-6 - Removed extra space in commit msg of Patch-5 V2-changes: - Addressed Ciara Loftus's review comments. - Split Watchdog and flow flush from other patches. - Shortened multiple comments and commit msg - Prevented iavf_resume_pending_start() looping During PF-initiated reset or a remote/ToR switch link-flap, the VF might miss the reset event, race on the no_poll gate, leak in-flight Tx descriptors, and stay down if dev_start ran before the PF VSI was ready. This patch series build on the earlier reset-recovery fixes with the following: - Reset detection: complement the ARQLEN1 check with VFGEN_RSTAT (VIRTCHNL_VFR_INPROGRESS) and poll at a 5 ms interval, matching the kernel iavf driver, so fast ARQ flips are not missed. When the VFR is still not observed, recover anyway instead of bailing out, keeping PF and VF state in sync. - no_poll: make the flag atomic (RTE_ATOMIC) with release/acquire ordering so the data-plane lcores observe gate changes reliably. - Tx drain: add iavf_dev_tx_drain() to flush in-flight Tx descriptors on link-down and impending-reset events before teardown, preventing MDD events and descriptor leaks. - Deferred start: when dev_start fails during recovery (PF VSI inactive), defer it via start_pending and resume on the next link-up event so the VF comes back without manual intervention. - AdminQ: discard zeroed (opcode 0) descriptors seen during PF-initiated resets to avoid the "Request 0 is not supported" log flood. - Watchdog: keep watchdog armed for the whole reset window - Flow flush: skip flow flush during PF-initiated reset Anurag Mandal (7): net/iavf: discard empty AdminQ descriptors on reset net/iavf: defer device start when PF VSI not ready net/iavf: drain in-flight Tx before reset net/iavf: change no_poll flag to atomic net/iavf: improve VF reset detection on fast ARQ flip net/iavf: keep watchdog armed for the whole reset window net/iavf: skip flow flush during PF-initiated reset drivers/net/intel/iavf/iavf.h | 5 +- drivers/net/intel/iavf/iavf_ethdev.c | 108 +++++++++++++++++++++++---- drivers/net/intel/iavf/iavf_rxtx.c | 108 ++++++++++++++++++++++++++- drivers/net/intel/iavf/iavf_rxtx.h | 6 ++ drivers/net/intel/iavf/iavf_vchnl.c | 22 +++++- 5 files changed, 229 insertions(+), 20 deletions(-) -- 2.34.1