From patchwork Thu Mar 26 15:08:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joerg Roedel X-Patchwork-Id: 11460385 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 841E71667 for ; Thu, 26 Mar 2020 15:09:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6332620787 for ; Thu, 26 Mar 2020 15:09:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="eYD0HKVu" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6332620787 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=o06lT0GdlCY4lV5ebPSG7wx/i57dfTxSCj/IIy5mHPk=; b=eYD0HKVuvT5Az1Vx0X8aC+Fj/B 25M8+miE5zdx8TejGAtlayLY1JxWaNw2bmzJx1VxiX6KivwlEJm1wKW2g5d4Jt2FymWPlpJ1tlCDd jFUi3i9SLF9I0drT9RzQzIVOOivpr63Ma3qctM6VllyB+1ep6TaEWvYHtIxCEUWu/6QV6euOwTLBb BrivdqwEoumqRNE4JKiZxs9ueTDT3w1AlZ6fQeE/TGvA8PuuJsfhlqmuReEbEVr/otk+xsDevdKEP WjVXtxXXypSAe44wo4cjSZh7JobifMVLADrOKhGVMdC2elqPKT4Rte1N3K2Z/IdBCefmbjA5hKLUZ e3rLqI4g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jHU8D-0004br-GG; Thu, 26 Mar 2020 15:09:17 +0000 Received: from 8bytes.org ([81.169.241.247] helo=theia.8bytes.org) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jHU7q-000423-Hc for linux-mediatek@lists.infradead.org; Thu, 26 Mar 2020 15:08:57 +0000 Received: by theia.8bytes.org (Postfix, from userid 1000) id B4FEC8A8; Thu, 26 Mar 2020 16:08:47 +0100 (CET) From: Joerg Roedel To: iommu@lists.linux-foundation.org Subject: [PATCH v4 10/16] iommu/arm-smmu: Refactor master_cfg/fwspec usage Date: Thu, 26 Mar 2020 16:08:35 +0100 Message-Id: <20200326150841.10083-11-joro@8bytes.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200326150841.10083-1-joro@8bytes.org> References: <20200326150841.10083-1-joro@8bytes.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200326_080854_785531_2C469F29 X-CRM114-Status: GOOD ( 14.29 ) X-Spam-Score: -0.0 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [81.169.241.247 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jean-Philippe Brucker , Joerg Roedel , Will Deacon , Greg Kroah-Hartman , linux-arm-msm@vger.kernel.org, Joerg Roedel , guohanjun@huawei.com, linux-kernel@vger.kernel.org, Bjorn Andersson , Rob Clark , Thierry Reding , linux-mediatek@lists.infradead.org, Andy Gross , Sudeep Holla , Matthias Brugger , Sean Paul , Robin Murphy MIME-Version: 1.0 Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org From: Robin Murphy In preparation for restructuring iommu_fwspec, refactor the way we access the arm_smmu_master_cfg private data to be less dependent on the current layout. Signed-off-by: Robin Murphy Signed-off-by: Joerg Roedel --- drivers/iommu/arm-smmu.c | 42 +++++++++++++++++++++------------------- 1 file changed, 22 insertions(+), 20 deletions(-) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 980aae73b45b..3cef2bfd6f3e 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -98,12 +98,10 @@ struct arm_smmu_master_cfg { s16 smendx[]; }; #define INVALID_SMENDX -1 -#define __fwspec_cfg(fw) ((struct arm_smmu_master_cfg *)fw->iommu_priv) -#define fwspec_smmu(fw) (__fwspec_cfg(fw)->smmu) -#define fwspec_smendx(fw, i) \ - (i >= fw->num_ids ? INVALID_SMENDX : __fwspec_cfg(fw)->smendx[i]) -#define for_each_cfg_sme(fw, i, idx) \ - for (i = 0; idx = fwspec_smendx(fw, i), i < fw->num_ids; ++i) +#define cfg_smendx(cfg, fw, i) \ + (i >= fw->num_ids ? INVALID_SMENDX : cfg->smendx[i]) +#define for_each_cfg_sme(cfg, fw, i, idx) \ + for (i = 0; idx = cfg_smendx(cfg, fw, i), i < fw->num_ids; ++i) static bool using_legacy_binding, using_generic_binding; @@ -1069,7 +1067,7 @@ static int arm_smmu_master_alloc_smes(struct device *dev) mutex_lock(&smmu->stream_map_mutex); /* Figure out a viable stream map entry allocation */ - for_each_cfg_sme(fwspec, i, idx) { + for_each_cfg_sme(cfg, fwspec, i, idx) { u16 sid = FIELD_GET(ARM_SMMU_SMR_ID, fwspec->ids[i]); u16 mask = FIELD_GET(ARM_SMMU_SMR_MASK, fwspec->ids[i]); @@ -1100,7 +1098,7 @@ static int arm_smmu_master_alloc_smes(struct device *dev) iommu_group_put(group); /* It worked! Now, poke the actual hardware */ - for_each_cfg_sme(fwspec, i, idx) { + for_each_cfg_sme(cfg, fwspec, i, idx) { arm_smmu_write_sme(smmu, idx); smmu->s2crs[idx].group = group; } @@ -1117,14 +1115,14 @@ static int arm_smmu_master_alloc_smes(struct device *dev) return ret; } -static void arm_smmu_master_free_smes(struct iommu_fwspec *fwspec) +static void arm_smmu_master_free_smes(struct arm_smmu_master_cfg *cfg, + struct iommu_fwspec *fwspec) { - struct arm_smmu_device *smmu = fwspec_smmu(fwspec); - struct arm_smmu_master_cfg *cfg = fwspec->iommu_priv; + struct arm_smmu_device *smmu = cfg->smmu; int i, idx; mutex_lock(&smmu->stream_map_mutex); - for_each_cfg_sme(fwspec, i, idx) { + for_each_cfg_sme(cfg, fwspec, i, idx) { if (arm_smmu_free_sme(smmu, idx)) arm_smmu_write_sme(smmu, idx); cfg->smendx[i] = INVALID_SMENDX; @@ -1133,6 +1131,7 @@ static void arm_smmu_master_free_smes(struct iommu_fwspec *fwspec) } static int arm_smmu_domain_add_master(struct arm_smmu_domain *smmu_domain, + struct arm_smmu_master_cfg *cfg, struct iommu_fwspec *fwspec) { struct arm_smmu_device *smmu = smmu_domain->smmu; @@ -1146,7 +1145,7 @@ static int arm_smmu_domain_add_master(struct arm_smmu_domain *smmu_domain, else type = S2CR_TYPE_TRANS; - for_each_cfg_sme(fwspec, i, idx) { + for_each_cfg_sme(cfg, fwspec, i, idx) { if (type == s2cr[idx].type && cbndx == s2cr[idx].cbndx) continue; @@ -1162,8 +1161,9 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) { int ret; struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); - struct arm_smmu_device *smmu; struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + struct arm_smmu_master_cfg *cfg; + struct arm_smmu_device *smmu; if (!fwspec || fwspec->ops != &arm_smmu_ops) { dev_err(dev, "cannot attach to SMMU, is it on the same bus?\n"); @@ -1177,10 +1177,11 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) * domains, just say no (but more politely than by dereferencing NULL). * This should be at least a WARN_ON once that's sorted. */ - if (!fwspec->iommu_priv) + cfg = fwspec->iommu_priv; + if (!cfg) return -ENODEV; - smmu = fwspec_smmu(fwspec); + smmu = cfg->smmu; ret = arm_smmu_rpm_get(smmu); if (ret < 0) @@ -1204,7 +1205,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) } /* Looks ok, so add the device to the domain */ - ret = arm_smmu_domain_add_master(smmu_domain, fwspec); + ret = arm_smmu_domain_add_master(smmu_domain, cfg, fwspec); /* * Setup an autosuspend delay to avoid bouncing runpm state. @@ -1475,7 +1476,7 @@ static void arm_smmu_remove_device(struct device *dev) return; iommu_device_unlink(&smmu->iommu, dev); - arm_smmu_master_free_smes(fwspec); + arm_smmu_master_free_smes(cfg, fwspec); arm_smmu_rpm_put(smmu); @@ -1487,11 +1488,12 @@ static void arm_smmu_remove_device(struct device *dev) static struct iommu_group *arm_smmu_device_group(struct device *dev) { struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); - struct arm_smmu_device *smmu = fwspec_smmu(fwspec); + struct arm_smmu_master_cfg *cfg = fwspec->iommu_priv; + struct arm_smmu_device *smmu = cfg->smmu; struct iommu_group *group = NULL; int i, idx; - for_each_cfg_sme(fwspec, i, idx) { + for_each_cfg_sme(cfg, fwspec, i, idx) { if (group && smmu->s2crs[idx].group && group != smmu->s2crs[idx].group) return ERR_PTR(-EINVAL);