From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8E34339B94A for ; Sat, 28 Feb 2026 18:16:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302584; cv=none; b=hvGvBoXyQLEntn5GfsztcwHLsgmxDrP0UeE/W2qEtxZW/CZaMQvBUA8X+kLr/LK0g2mnOLWHXV92u/rM7LI+WsmjzQnXc/ksh53mdtmu0u4KxSKEMCccqLxu3GiIPEG12BpgBDzq5E0LlDIIwi42SJ/ywmNQRIF7Qg/wpjoGGcM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302584; c=relaxed/simple; bh=1akuxA7GZsQW7Wey1++G2Ngio2xTxkznj7ixvl43pkU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UqP19H3h5j2MoAD42fYzHQxFbdSUp7g4QFhFq0CUagwrakJN/lphkIok2eSFlyyeEJr9rBuhqA7VQrkwmbZumz3UtZs0nZ0bQHd7oYSY+9mbn2B66TVA7boKRzNFuihqqd4bAHgCAhfQhmhNHycjGl9cVZb1LvwPW5vrUCLYRxc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=u0HmRnrO; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="u0HmRnrO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DF4DEC19423; Sat, 28 Feb 2026 18:16:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772302584; bh=1akuxA7GZsQW7Wey1++G2Ngio2xTxkznj7ixvl43pkU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=u0HmRnrOCAtjvldAbRbS8G2G1Urzapmhy8sdETIFIHRUuAlPGIUcjndXOtRIHfSxi e1asiJJ8fcEpb2HhOfSM2j0cKOdi73+hffwzRMkdej6w0CaGFVfZjQSNbgsl03d8WU AKdJkL1eve36JjctfKn6q3TLqYe2UrPHyxCdQ37uSw+DgDDkwcVbWJpuoR2S+IIVrg KgJvUP3RH5DfW7lEnJEyMHCAdq4UN6fnwS4+DoNrPUYJba9BTeANumtuPPH74zHYlf y4YSkTwtMmvlTo2iAXyVnYN7cFzALdgNUgPzh6sX4KHAgAuIUT6BI1ULI7JxsPZCTX K3kUU75+/K3AA== From: Sasha Levin To: patches@lists.linux.dev Cc: Chengchang Tang , Junxian Huang , Leon Romanovsky , Sasha Levin Subject: [PATCH 5.15 093/164] RDMA/hns: Notify ULP of remaining soft-WCs during reset Date: Sat, 28 Feb 2026 13:13:52 -0500 Message-ID: <20260228181505.1600663-93-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228181505.1600663-1-sashal@kernel.org> References: <20260228181505.1600663-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Chengchang Tang [ Upstream commit 0789f929900d85b80b343c5f04f8b9444e991384 ] During a reset, software-generated WCs cannot be reported via interrupts. This may cause the ULP to miss some WCs. To avoid this, add check in the CQ arm process: if a hardware reset has occurred and there are still unreported soft-WCs, notify the ULP to handle the remaining WCs, thereby preventing any loss of completions. Fixes: 626903e9355b ("RDMA/hns: Add support for reporting wc as software mode") Signed-off-by: Chengchang Tang Signed-off-by: Junxian Huang Link: https://patch.msgid.link/20260104064057.1582216-5-huangjunxian6@hisilicon.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 23 ++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index 8baf6fb2d1fa5..43b661f971882 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -3376,6 +3376,23 @@ static void hns_roce_v2_write_cqc(struct hns_roce_dev *hr_dev, HNS_ROCE_V2_CQ_DEFAULT_INTERVAL); } +static bool left_sw_wc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq) +{ + struct hns_roce_qp *hr_qp; + + list_for_each_entry(hr_qp, &hr_cq->sq_list, sq_node) { + if (hr_qp->sq.head != hr_qp->sq.tail) + return true; + } + + list_for_each_entry(hr_qp, &hr_cq->rq_list, rq_node) { + if (hr_qp->rq.head != hr_qp->rq.tail) + return true; + } + + return false; +} + static int hns_roce_v2_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) { @@ -3384,6 +3401,12 @@ static int hns_roce_v2_req_notify_cq(struct ib_cq *ibcq, struct hns_roce_v2_db cq_db = {}; u32 notify_flag; + if (hr_dev->state >= HNS_ROCE_DEVICE_STATE_RST_DOWN) { + if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && + left_sw_wc(hr_dev, hr_cq)) + return 1; + return 0; + } /* * flags = 0, then notify_flag : next * flags = 1, then notify flag : solocited -- 2.51.0