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 X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9AC09C6778F for ; Fri, 27 Jul 2018 13:16:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5E07E208B0 for ; Fri, 27 Jul 2018 13:16:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5E07E208B0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=st.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388909AbeG0OiM (ORCPT ); Fri, 27 Jul 2018 10:38:12 -0400 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:10721 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388585AbeG0OhZ (ORCPT ); Fri, 27 Jul 2018 10:37:25 -0400 Received: from pps.filterd (m0046037.ppops.net [127.0.0.1]) by mx07-.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id w6RDESkq024978; Fri, 27 Jul 2018 15:15:28 +0200 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2kg1up0nsm-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 27 Jul 2018 15:15:28 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id EECF238; Fri, 27 Jul 2018 13:15:27 +0000 (GMT) Received: from Webmail-eu.st.com (sfhdag7node2.st.com [10.75.127.20]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id D4B21577A; Fri, 27 Jul 2018 13:15:27 +0000 (GMT) Received: from localhost (10.75.127.48) by SFHDAG7NODE2.st.com (10.75.127.20) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 27 Jul 2018 15:15:27 +0200 From: Loic Pallardy To: , CC: , , , , , Loic Pallardy Subject: [PATCH v4 10/17] remoteproc: add helper function to check carveout device address Date: Fri, 27 Jul 2018 15:14:45 +0200 Message-ID: <1532697292-14272-11-git-send-email-loic.pallardy@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1532697292-14272-1-git-send-email-loic.pallardy@st.com> References: <1532697292-14272-1-git-send-email-loic.pallardy@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.75.127.48] X-ClientProxiedBy: SFHDAG8NODE1.st.com (10.75.127.22) To SFHDAG7NODE2.st.com (10.75.127.20) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-07-27_06:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch introduces a function to verify that a specified carveout is fitting request device address and associated length Signed-off-by: Loic Pallardy --- drivers/remoteproc/remoteproc_core.c | 47 ++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 1e0fe3e..5dd5edf 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -259,6 +259,53 @@ struct rproc_mem_entry * return mem; } +/** + * rproc_check_carveout_da() - Check specified carveout da configuration + * @rproc: handle of a remote processor + * @mem: pointer on carveout to check + * @da: area device address + * @len: associated area size + * + * This function is a helper function to verify requested device area (couple + * da, len) is part of specified carevout. + * + * Return: 0 if carveout matchs request else -ENOMEM + */ +int rproc_check_carveout_da(struct rproc *rproc, struct rproc_mem_entry *mem, + u32 da, u32 len) +{ + struct device *dev = &rproc->dev; + int delta = 0; + + /* Check requested resource length */ + if (len > mem->len) { + dev_err(dev, "Registered carveout doesn't fit len request\n"); + return -ENOMEM; + } + + if (da != FW_RSC_ADDR_ANY && mem->da == FW_RSC_ADDR_ANY) { + /* Update existing carveout da */ + mem->da = da; + } else if (da != FW_RSC_ADDR_ANY && mem->da != FW_RSC_ADDR_ANY) { + delta = da - mem->da; + + /* Check requested resource belongs to registered carveout */ + if (delta < 0) { + dev_err(dev, + "Registered carveout doesn't fit da request\n"); + return -ENOMEM; + } + + if (delta + len > mem->len) { + dev_err(dev, + "Registered carveout doesn't fit len request\n"); + return -ENOMEM; + } + } + + return 0; +} + int rproc_alloc_vring(struct rproc_vdev *rvdev, int i) { struct rproc *rproc = rvdev->rproc; -- 1.9.1