From patchwork Tue Sep 28 11:44:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Cabiddu, Giovanni" X-Patchwork-Id: 12522339 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 239C7C4332F for ; Tue, 28 Sep 2021 11:44:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 091B86113E for ; Tue, 28 Sep 2021 11:44:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240394AbhI1Lqd (ORCPT ); Tue, 28 Sep 2021 07:46:33 -0400 Received: from mga07.intel.com ([134.134.136.100]:37909 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231202AbhI1Lqc (ORCPT ); Tue, 28 Sep 2021 07:46:32 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10120"; a="288339040" X-IronPort-AV: E=Sophos;i="5.85,329,1624345200"; d="scan'208";a="288339040" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Sep 2021 04:44:53 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.85,329,1624345200"; d="scan'208";a="562224628" Received: from silpixa00400314.ir.intel.com (HELO silpixa00400314.ger.corp.intel.com) ([10.237.222.51]) by fmsmga002.fm.intel.com with ESMTP; 28 Sep 2021 04:44:52 -0700 From: Giovanni Cabiddu To: herbert@gondor.apana.org.au Cc: linux-crypto@vger.kernel.org, qat-linux@intel.com, Giovanni Cabiddu , Marco Chiappero Subject: [PATCH 02/12] crypto: qat - disregard spurious PFVF interrupts Date: Tue, 28 Sep 2021 12:44:30 +0100 Message-Id: <20210928114440.355368-3-giovanni.cabiddu@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210928114440.355368-1-giovanni.cabiddu@intel.com> References: <20210928114440.355368-1-giovanni.cabiddu@intel.com> MIME-Version: 1.0 Organization: Intel Research and Development Ireland Ltd - Co. Reg. #308263 - Collinstown Industrial Park, Leixlip, County Kildare - Ireland Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Upon receiving a PFVF message, check if the interrupt bit is set in the message. If it is not, that means that the interrupt was probably triggered by a collision. In this case, disregard the message and re-enable the interrupts. Fixes: ed8ccaef52fa ("crypto: qat - Add support for SRIOV") Signed-off-by: Giovanni Cabiddu Reviewed-by: Marco Chiappero --- drivers/crypto/qat/qat_common/adf_pf2vf_msg.c | 6 ++++++ drivers/crypto/qat/qat_common/adf_vf_isr.c | 6 ++++++ 2 files changed, 12 insertions(+) diff --git a/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c b/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c index 789a4135e28c..5a41beb8f20f 100644 --- a/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c +++ b/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c @@ -211,6 +211,11 @@ void adf_vf2pf_req_hndl(struct adf_accel_vf_info *vf_info) /* Read message from the VF */ msg = ADF_CSR_RD(pmisc_addr, hw_data->get_pf2vf_offset(vf_nr)); + if (!(msg & ADF_VF2PF_INT)) { + dev_info(&GET_DEV(accel_dev), + "Spurious VF2PF interrupt, msg %X. Ignored\n", msg); + goto out; + } /* To ACK, clear the VF2PFINT bit */ msg &= ~ADF_VF2PF_INT; @@ -294,6 +299,7 @@ void adf_vf2pf_req_hndl(struct adf_accel_vf_info *vf_info) if (resp && adf_iov_putmsg(accel_dev, resp, vf_nr)) dev_err(&GET_DEV(accel_dev), "Failed to send response to VF\n"); +out: /* re-enable interrupt on PF from this VF */ adf_enable_vf2pf_interrupts(accel_dev, (1 << vf_nr)); diff --git a/drivers/crypto/qat/qat_common/adf_vf_isr.c b/drivers/crypto/qat/qat_common/adf_vf_isr.c index 07f81682c19b..db5e7abbe5f3 100644 --- a/drivers/crypto/qat/qat_common/adf_vf_isr.c +++ b/drivers/crypto/qat/qat_common/adf_vf_isr.c @@ -96,6 +96,11 @@ static void adf_pf2vf_bh_handler(void *data) /* Read the message from PF */ msg = ADF_CSR_RD(pmisc_bar_addr, hw_data->get_pf2vf_offset(0)); + if (!(msg & ADF_PF2VF_INT)) { + dev_info(&GET_DEV(accel_dev), + "Spurious PF2VF interrupt, msg %X. Ignored\n", msg); + goto out; + } if (!(msg & ADF_PF2VF_MSGORIGIN_SYSTEM)) /* Ignore legacy non-system (non-kernel) PF2VF messages */ @@ -144,6 +149,7 @@ static void adf_pf2vf_bh_handler(void *data) msg &= ~ADF_PF2VF_INT; ADF_CSR_WR(pmisc_bar_addr, hw_data->get_pf2vf_offset(0), msg); +out: /* Re-enable PF2VF interrupts */ adf_enable_pf2vf_interrupts(accel_dev); return;