From patchwork Wed Sep 20 10:47:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ekansh Gupta X-Patchwork-Id: 13392523 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6B7A5CE79C4 for ; Wed, 20 Sep 2023 10:48:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234375AbjITKsD (ORCPT ); Wed, 20 Sep 2023 06:48:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51160 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233567AbjITKrm (ORCPT ); Wed, 20 Sep 2023 06:47:42 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D47A9183; Wed, 20 Sep 2023 03:47:29 -0700 (PDT) Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 38K5KbDO021321; Wed, 20 Sep 2023 10:47:25 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=4OOKpaSJ3Dpz1DZLKu96Rsw4X62hET4XC+R0SjKTIXk=; b=ULlMzPHIRYfPYCbLk2uTN32mDulIhirZGo1O0SKE29S8PYnCEciSxz5E03Aw2qyiKK8H iJG2HJNuKExlK4w6bDXKMHjwl5GNtmTHzyP/BOz20R9IehmijfwWq2gTFUBxBDZeMctp zUOUdCDOFvR0r2SebiN4KFZOJF6eys1YXapMTmaGTxj1V0i1jzWgyg4mMWE5wj3vbKh0 TdMBivSPBI+ZnlVT6qXpyLMVVRQdR+btiJWU39c7u9nfHa9uJnDtYknLEy/QrgpNilKD jmS/RUUYfEFI4WIB27jY+6Z+REWSOF9r3dw97qR8cziTpHlN/Q2tD+fi/1ozicvNUX0z Tw== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3t7qj90yvt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 20 Sep 2023 10:47:25 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 38KAlOk3003619 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 20 Sep 2023 10:47:24 GMT Received: from ekangupt-linux.qualcomm.com (10.80.80.8) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.36; Wed, 20 Sep 2023 03:47:21 -0700 From: Ekansh Gupta To: , CC: Ekansh Gupta , , , , Subject: [PATCH v3 2/5] misc: fastrpc: Add CRC support for remote buffers Date: Wed, 20 Sep 2023 16:17:04 +0530 Message-ID: <1695206827-29446-3-git-send-email-quic_ekangupt@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1695206827-29446-1-git-send-email-quic_ekangupt@quicinc.com> References: <1695206827-29446-1-git-send-email-quic_ekangupt@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 4XftUyOf2wVyoTtHwBg4ihpO1nXmqKBU X-Proofpoint-ORIG-GUID: 4XftUyOf2wVyoTtHwBg4ihpO1nXmqKBU X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-09-20_05,2023-09-20_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 impostorscore=0 suspectscore=0 mlxlogscore=999 mlxscore=0 phishscore=0 lowpriorityscore=0 adultscore=0 bulkscore=0 malwarescore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309200085 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org CRC check for input and output argument helps in ensuring data consistency over a remote call. If user intends to enable CRC check, first local user CRC is calculated at user end and a CRC buffer is passed to DSP to capture remote CRC values. DSP is expected to write to the remote CRC buffer which is then compared at user level with the local CRC values. Signed-off-by: Ekansh Gupta --- drivers/misc/fastrpc.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 04eaf6c..337ec1f 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -610,6 +610,7 @@ static struct fastrpc_invoke_ctx *fastrpc_context_alloc( /* Released in fastrpc_context_put() */ fastrpc_channel_ctx_get(cctx); + ctx->crc = (u32 *)(uintptr_t)invoke->crc; ctx->sc = sc; ctx->retval = -1; ctx->pid = current->pid; @@ -1063,6 +1064,7 @@ static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, struct fastrpc_invoke_buf *list; struct fastrpc_phy_page *pages; u64 *fdlist; + u32 *crclist; int i, inbufs, outbufs, handles; inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); @@ -1070,7 +1072,8 @@ static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); pages = fastrpc_phy_page_start(list, ctx->nscalars); - fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); + fdlist = (u64 *)(pages + inbufs + outbufs + handles); + crclist = (u32 *)(fdlist + FASTRPC_MAX_FDLIST); for (i = inbufs; i < ctx->nbufs; ++i) { if (!ctx->maps[i]) { @@ -1094,6 +1097,10 @@ static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, fastrpc_map_put(mmap); } + if (ctx->crc && crclist && rpra) { + if (copy_to_user((void __user *)ctx->crc, crclist, FASTRPC_MAX_CRCLIST * sizeof(u32))) + return -EFAULT; + } return 0; } @@ -1706,6 +1713,7 @@ static int fastrpc_multimode_invoke(struct fastrpc_user *fl, char __user *argp) switch (invoke.req) { case FASTRPC_INVOKE: + case FASTRPC_INVOKE_ENHANCED: /* nscalars is truncated here to max supported value */ if (copy_from_user(&einv, (void __user *)(uintptr_t)invoke.invparam, invoke.size))