From patchwork Wed Apr 17 18:24:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 10905819 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 737C2922 for ; Wed, 17 Apr 2019 18:29:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 57AA328B75 for ; Wed, 17 Apr 2019 18:29:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 48ECD28B7B; Wed, 17 Apr 2019 18:29:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E145128B75 for ; Wed, 17 Apr 2019 18:29:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=m7D+Q0GLT6+rTpkuY3Yi91YSmWyY3cp3W7mdE5+cBqE=; b=RbhfkQrJJ4kKf2 4rh7pPu4CmYFKi5mb660TgIXCuBbqklKw9QtHzDZkxEk3Y+LWVK656C2v4a6lIDoqWcv7/15qgAZc c8F99YkLHnx2vIB4gw/bDs3djQhreVSnTS7QpLlaX7/A7w2Gvu81PJBQmhWnvl7GxPg8FBeovx9gA luHCES/fs+LZnKkXN0iAo9hTOgsNqp+GepdfOAXXTDWE8TeWOZA3tsku1mhwJLRGgTGs5xrAycQ6V UYrocigYasqs5ZwmEbs8+qtAlsco3jkr6ShNG5M5+A3LeiIA4+BIfxxGWux0hbJXftexETS3oNHeJ doTkLb9kurAPFCGP/opQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hGpIv-0004Yu-Oc; Wed, 17 Apr 2019 18:29:05 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hGpIG-0003e1-8v for linux-arm-kernel@lists.infradead.org; Wed, 17 Apr 2019 18:28:25 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 15E501688; Wed, 17 Apr 2019 11:28:24 -0700 (PDT) Received: from ostrya.cambridge.arm.com (ostrya.cambridge.arm.com [10.1.196.129]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 6778E3F59C; Wed, 17 Apr 2019 11:28:21 -0700 (PDT) From: Jean-Philippe Brucker To: will.deacon@arm.com, lorenzo.pieralisi@arm.com, bhelgaas@google.com Subject: [PATCH v3 5/9] iommu/arm-smmu-v3: Store SteamIDs in master Date: Wed, 17 Apr 2019 19:24:44 +0100 Message-Id: <20190417182448.12382-6-jean-philippe.brucker@arm.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190417182448.12382-1-jean-philippe.brucker@arm.com> References: <20190417182448.12382-1-jean-philippe.brucker@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190417_112824_363798_3AB763BE X-CRM114-Status: GOOD ( 15.63 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: eric.auger@redhat.com, zhongmiao@hisilicon.com, okaya@kernel.org, joro@8bytes.org, rjw@rjwysocki.net, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org, hanjun.guo@linaro.org, sudeep.holla@arm.com, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org, lenb@kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Simplify the attach/detach code a bit by keeping a pointer to the stream IDs in the master structure. Although not completely obvious here, it does make the subsequent support for ATS, PRI and PASID a bit simpler. Signed-off-by: Jean-Philippe Brucker --- drivers/iommu/arm-smmu-v3.c | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 50cb037f3d8a..25ba546cae7f 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -594,6 +594,8 @@ struct arm_smmu_device { struct arm_smmu_master { struct arm_smmu_device *smmu; struct arm_smmu_strtab_ent ste; + u32 *sids; + unsigned int num_sids; }; /* SMMU private data for an IOMMU domain */ @@ -1688,19 +1690,18 @@ static __le64 *arm_smmu_get_step_for_sid(struct arm_smmu_device *smmu, u32 sid) return step; } -static void arm_smmu_install_ste_for_dev(struct iommu_fwspec *fwspec) +static void arm_smmu_install_ste_for_dev(struct arm_smmu_master *master) { int i, j; - struct arm_smmu_master *master = fwspec->iommu_priv; struct arm_smmu_device *smmu = master->smmu; - for (i = 0; i < fwspec->num_ids; ++i) { - u32 sid = fwspec->ids[i]; + for (i = 0; i < master->num_sids; ++i) { + u32 sid = master->sids[i]; __le64 *step = arm_smmu_get_step_for_sid(smmu, sid); /* Bridged PCI devices may end up with duplicated IDs */ for (j = 0; j < i; j++) - if (fwspec->ids[j] == sid) + if (master->sids[j] == sid) break; if (j < i) continue; @@ -1709,13 +1710,10 @@ static void arm_smmu_install_ste_for_dev(struct iommu_fwspec *fwspec) } } -static void arm_smmu_detach_dev(struct device *dev) +static void arm_smmu_detach_dev(struct arm_smmu_master *master) { - struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); - struct arm_smmu_master *master = fwspec->iommu_priv; - master->ste.assigned = false; - arm_smmu_install_ste_for_dev(fwspec); + arm_smmu_install_ste_for_dev(master); } static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) @@ -1736,7 +1734,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) /* Already attached to a different domain? */ if (ste->assigned) - arm_smmu_detach_dev(dev); + arm_smmu_detach_dev(master); mutex_lock(&smmu_domain->init_mutex); @@ -1770,7 +1768,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) ste->s2_cfg = &smmu_domain->s2_cfg; } - arm_smmu_install_ste_for_dev(fwspec); + arm_smmu_install_ste_for_dev(master); out_unlock: mutex_unlock(&smmu_domain->init_mutex); return ret; @@ -1883,12 +1881,14 @@ static int arm_smmu_add_device(struct device *dev) return -ENOMEM; master->smmu = smmu; + master->sids = fwspec->ids; + master->num_sids = fwspec->num_ids; fwspec->iommu_priv = master; } /* Check the SIDs are in range of the SMMU and our stream table */ - for (i = 0; i < fwspec->num_ids; i++) { - u32 sid = fwspec->ids[i]; + for (i = 0; i < master->num_sids; i++) { + u32 sid = master->sids[i]; if (!arm_smmu_sid_in_range(smmu, sid)) return -ERANGE; @@ -1922,7 +1922,7 @@ static void arm_smmu_remove_device(struct device *dev) master = fwspec->iommu_priv; smmu = master->smmu; if (master && master->ste.assigned) - arm_smmu_detach_dev(dev); + arm_smmu_detach_dev(master); iommu_group_remove_device(dev); iommu_device_unlink(&smmu->iommu, dev); kfree(master);