From patchwork Tue Apr 20 08:27:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shameerali Kolothum Thodi X-Patchwork-Id: 12213635 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 D0A78C433B4 for ; Tue, 20 Apr 2021 09:28:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A78261090 for ; Tue, 20 Apr 2021 09:28:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229937AbhDTJ3O (ORCPT ); Tue, 20 Apr 2021 05:29:14 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:16484 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229494AbhDTJ3N (ORCPT ); Tue, 20 Apr 2021 05:29:13 -0400 Received: from DGGEMS406-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4FPdbc1ky7zrfYB; Tue, 20 Apr 2021 17:26:20 +0800 (CST) Received: from A2006125610.china.huawei.com (10.47.83.26) by DGGEMS406-HUB.china.huawei.com (10.3.19.206) with Microsoft SMTP Server id 14.3.498.0; Tue, 20 Apr 2021 17:28:32 +0800 From: Shameer Kolothum To: , , CC: , , , , , , , , , Subject: [PATCH v3 05/10] iommu/arm-smmu-v3: Introduce strtab init helper Date: Tue, 20 Apr 2021 10:27:46 +0200 Message-ID: <20210420082751.1829-6-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20210420082751.1829-1-shameerali.kolothum.thodi@huawei.com> References: <20210420082751.1829-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.47.83.26] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Introduce a helper to check the sid range and to init the l2 strtab entries(bypass). This will be useful when we have to initialize the l2 strtab with bypass for RMR SIDs. Signed-off-by: Shameer Kolothum --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 26 ++++++++++++--------- 1 file changed, 15 insertions(+), 11 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 8594b4a83043..29da3b681621 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2347,6 +2347,19 @@ static bool arm_smmu_sid_in_range(struct arm_smmu_device *smmu, u32 sid) static struct iommu_ops arm_smmu_ops; +static int arm_smmu_init_sid_strtab(struct arm_smmu_device *smmu, u32 sid) +{ + /* Check the SIDs are in range of the SMMU and our stream table */ + if (!arm_smmu_sid_in_range(smmu, sid)) + return -ERANGE; + + /* Ensure l2 strtab is initialised */ + if (smmu->features & ARM_SMMU_FEAT_2_LVL_STRTAB) + return arm_smmu_init_l2_strtab(smmu, sid); + + return 0; +} + static struct iommu_device *arm_smmu_probe_device(struct device *dev) { int i, ret; @@ -2375,21 +2388,12 @@ static struct iommu_device *arm_smmu_probe_device(struct device *dev) INIT_LIST_HEAD(&master->bonds); dev_iommu_priv_set(dev, master); - /* Check the SIDs are in range of the SMMU and our stream table */ for (i = 0; i < master->num_sids; i++) { u32 sid = master->sids[i]; - if (!arm_smmu_sid_in_range(smmu, sid)) { - ret = -ERANGE; + ret = arm_smmu_init_sid_strtab(smmu, sid); + if (ret) goto err_free_master; - } - - /* Ensure l2 strtab is initialised */ - if (smmu->features & ARM_SMMU_FEAT_2_LVL_STRTAB) { - ret = arm_smmu_init_l2_strtab(smmu, sid); - if (ret) - goto err_free_master; - } } master->ssid_bits = min(smmu->ssid_bits, fwspec->num_pasid_bits);