From patchwork Tue Jun 2 07:48:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: You-Sheng Yang X-Patchwork-Id: 1302211 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.ubuntu.com (client-ip=91.189.94.19; helo=huckleberry.canonical.com; envelope-from=kernel-team-bounces@lists.ubuntu.com; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=canonical.com Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 49bkhm04JCz9sSn; Tue, 2 Jun 2020 17:49:44 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.86_2) (envelope-from ) id 1jg1g3-0005eO-ME; Tue, 02 Jun 2020 07:49:39 +0000 Received: from mail-pf1-f195.google.com ([209.85.210.195]) by huckleberry.canonical.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1jg1fy-0005ZA-J4 for kernel-team@lists.ubuntu.com; Tue, 02 Jun 2020 07:49:34 +0000 Received: by mail-pf1-f195.google.com with SMTP id a4so4682846pfo.4 for ; Tue, 02 Jun 2020 00:49:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=DgJcHm7jUWLdEN+eJBCV3TOG3LYlCtt1sRUfafCMKlM=; b=UKm+HXPT4WBCE+PDrkx8JfbXUffutZvaS6AQr4Pq5OmFePyYNBnU9y6bgnyqSS/PDw EFqCkMGJ05lNhbxKHmPXxRarnUDRJqsnkeLfvHmZqWMetobo3mn/2N97xH5hPzlLRv7c yEL4R5icJ346xJnnRkBw7QgzSZbFlMcixeJkmX4tf1RC5Mgbd3MiVwHvNTM8JngUXgTf 7XS6aSv9Mq6TXIR3yw7rY9InjsHf+GheH8mfwss8lukJQqEEUyerU50X+5Sb8or68AHd g3ryiozHkZMyKnNRRU3yi7AAJJDdBZlT2f1TlIwi2/Qzc3Ufu0jv2S5x5gVHyoV8ZQ1g SDXA== X-Gm-Message-State: AOAM530pHCfCzInyGKDrjHXOln/3k58VLutFF6nn1pyTBJ/kFHSUlmSj oeS4tFVqpk6/ob/hvUyHcxFR6kJFHoM= X-Google-Smtp-Source: ABdhPJyB8TxIkkP56k7g/N5AqPIAHB4ltaF5E89cvEvRWOLnyQCJssa5gYxOuNMSfIAkTsVZRY7C1g== X-Received: by 2002:a62:1b87:: with SMTP id b129mr23918659pfb.162.1591084172449; Tue, 02 Jun 2020 00:49:32 -0700 (PDT) Received: from localhost (61-220-137-37.HINET-IP.hinet.net. [61.220.137.37]) by smtp.gmail.com with ESMTPSA id s23sm1542698pju.35.2020.06.02.00.49.31 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Jun 2020 00:49:31 -0700 (PDT) From: You-Sheng Yang To: kernel-team@lists.ubuntu.com Subject: [PATCH v2 17/42][SRU][U] iommu/arm-smmu: Convert to probe/release_device() call-backs Date: Tue, 2 Jun 2020 15:48:18 +0800 Message-Id: <20200602074843.1743493-18-vicamo.yang@canonical.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200602074843.1743493-1-vicamo.yang@canonical.com> References: <20200602074843.1743493-1-vicamo.yang@canonical.com> MIME-Version: 1.0 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" From: Joerg Roedel BugLink: https://bugs.launchpad.net/bugs/1876707 Convert the arm-smmu and arm-smmu-v3 drivers to use the probe_device() and release_device() call-backs of iommu_ops, so that the iommu core code does the group and sysfs setup. Signed-off-by: Joerg Roedel Link: https://lore.kernel.org/r/20200429133712.31431-18-joro@8bytes.org Signed-off-by: Joerg Roedel (cherry picked from commit cefa0d55da3753e969764fb4b161052a1cb4ddfb linux-next) Signed-off-by: You-Sheng Yang --- drivers/iommu/arm-smmu-v3.c | 38 ++++++++++-------------------------- drivers/iommu/arm-smmu.c | 39 ++++++++++++++----------------------- 2 files changed, 25 insertions(+), 52 deletions(-) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 82508730feb7..42e1ee7e5197 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -2914,27 +2914,26 @@ 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_add_device(struct device *dev) +static struct iommu_device *arm_smmu_probe_device(struct device *dev) { int i, ret; struct arm_smmu_device *smmu; struct arm_smmu_master *master; struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); - struct iommu_group *group; if (!fwspec || fwspec->ops != &arm_smmu_ops) - return -ENODEV; + return ERR_PTR(-ENODEV); if (WARN_ON_ONCE(dev_iommu_priv_get(dev))) - return -EBUSY; + return ERR_PTR(-EBUSY); smmu = arm_smmu_get_by_fwnode(fwspec->iommu_fwnode); if (!smmu) - return -ENODEV; + return ERR_PTR(-ENODEV); master = kzalloc(sizeof(*master), GFP_KERNEL); if (!master) - return -ENOMEM; + return ERR_PTR(-ENOMEM); master->dev = dev; master->smmu = smmu; @@ -2975,30 +2974,15 @@ static int arm_smmu_add_device(struct device *dev) master->ssid_bits = min_t(u8, master->ssid_bits, CTXDESC_LINEAR_CDMAX); - ret = iommu_device_link(&smmu->iommu, dev); - if (ret) - goto err_disable_pasid; + return &smmu->iommu; - group = iommu_group_get_for_dev(dev); - if (IS_ERR(group)) { - ret = PTR_ERR(group); - goto err_unlink; - } - - iommu_group_put(group); - return 0; - -err_unlink: - iommu_device_unlink(&smmu->iommu, dev); -err_disable_pasid: - arm_smmu_disable_pasid(master); err_free_master: kfree(master); dev_iommu_priv_set(dev, NULL); - return ret; + return ERR_PTR(ret); } -static void arm_smmu_remove_device(struct device *dev) +static void arm_smmu_release_device(struct device *dev) { struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct arm_smmu_master *master; @@ -3010,8 +2994,6 @@ static void arm_smmu_remove_device(struct device *dev) master = dev_iommu_priv_get(dev); smmu = master->smmu; arm_smmu_detach_dev(master); - iommu_group_remove_device(dev); - iommu_device_unlink(&smmu->iommu, dev); arm_smmu_disable_pasid(master); kfree(master); iommu_fwspec_free(dev); @@ -3138,8 +3120,8 @@ static struct iommu_ops arm_smmu_ops = { .flush_iotlb_all = arm_smmu_flush_iotlb_all, .iotlb_sync = arm_smmu_iotlb_sync, .iova_to_phys = arm_smmu_iova_to_phys, - .add_device = arm_smmu_add_device, - .remove_device = arm_smmu_remove_device, + .probe_device = arm_smmu_probe_device, + .release_device = arm_smmu_release_device, .device_group = arm_smmu_device_group, .domain_get_attr = arm_smmu_domain_get_attr, .domain_set_attr = arm_smmu_domain_set_attr, diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index a6a5796e9c41..e622f4e33379 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -220,7 +220,7 @@ static int arm_smmu_register_legacy_master(struct device *dev, * With the legacy DT binding in play, we have no guarantees about * probe order, but then we're also not doing default domains, so we can * delay setting bus ops until we're sure every possible SMMU is ready, - * and that way ensure that no add_device() calls get missed. + * and that way ensure that no probe_device() calls get missed. */ static int arm_smmu_legacy_bus_init(void) { @@ -1062,7 +1062,6 @@ static int arm_smmu_master_alloc_smes(struct device *dev) struct arm_smmu_master_cfg *cfg = dev_iommu_priv_get(dev); struct arm_smmu_device *smmu = cfg->smmu; struct arm_smmu_smr *smrs = smmu->smrs; - struct iommu_group *group; int i, idx, ret; mutex_lock(&smmu->stream_map_mutex); @@ -1090,18 +1089,9 @@ static int arm_smmu_master_alloc_smes(struct device *dev) cfg->smendx[i] = (s16)idx; } - group = iommu_group_get_for_dev(dev); - if (IS_ERR(group)) { - ret = PTR_ERR(group); - goto out_err; - } - iommu_group_put(group); - /* It worked! Now, poke the actual hardware */ - for_each_cfg_sme(cfg, fwspec, i, idx) { + for_each_cfg_sme(cfg, fwspec, i, idx) arm_smmu_write_sme(smmu, idx); - smmu->s2crs[idx].group = group; - } mutex_unlock(&smmu->stream_map_mutex); return 0; @@ -1172,7 +1162,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) /* * FIXME: The arch/arm DMA API code tries to attach devices to its own - * domains between of_xlate() and add_device() - we have no way to cope + * domains between of_xlate() and probe_device() - we have no way to cope * with that, so until ARM gets converted to rely on groups and default * domains, just say no (but more politely than by dereferencing NULL). * This should be at least a WARN_ON once that's sorted. @@ -1382,7 +1372,7 @@ struct arm_smmu_device *arm_smmu_get_by_fwnode(struct fwnode_handle *fwnode) return dev ? dev_get_drvdata(dev) : NULL; } -static int arm_smmu_add_device(struct device *dev) +static struct iommu_device *arm_smmu_probe_device(struct device *dev) { struct arm_smmu_device *smmu = NULL; struct arm_smmu_master_cfg *cfg; @@ -1403,7 +1393,7 @@ static int arm_smmu_add_device(struct device *dev) } else if (fwspec && fwspec->ops == &arm_smmu_ops) { smmu = arm_smmu_get_by_fwnode(fwspec->iommu_fwnode); } else { - return -ENODEV; + return ERR_PTR(-ENODEV); } ret = -EINVAL; @@ -1444,21 +1434,19 @@ static int arm_smmu_add_device(struct device *dev) if (ret) goto out_cfg_free; - iommu_device_link(&smmu->iommu, dev); - device_link_add(dev, smmu->dev, DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_SUPPLIER); - return 0; + return &smmu->iommu; out_cfg_free: kfree(cfg); out_free: iommu_fwspec_free(dev); - return ret; + return ERR_PTR(ret); } -static void arm_smmu_remove_device(struct device *dev) +static void arm_smmu_release_device(struct device *dev) { struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct arm_smmu_master_cfg *cfg; @@ -1475,13 +1463,11 @@ static void arm_smmu_remove_device(struct device *dev) if (ret < 0) return; - iommu_device_unlink(&smmu->iommu, dev); arm_smmu_master_free_smes(cfg, fwspec); arm_smmu_rpm_put(smmu); dev_iommu_priv_set(dev, NULL); - iommu_group_remove_device(dev); kfree(cfg); iommu_fwspec_free(dev); } @@ -1512,6 +1498,11 @@ static struct iommu_group *arm_smmu_device_group(struct device *dev) else group = generic_device_group(dev); + /* Remember group for faster lookups */ + if (!IS_ERR(group)) + for_each_cfg_sme(cfg, fwspec, i, idx) + smmu->s2crs[idx].group = group; + return group; } @@ -1628,8 +1619,8 @@ static struct iommu_ops arm_smmu_ops = { .flush_iotlb_all = arm_smmu_flush_iotlb_all, .iotlb_sync = arm_smmu_iotlb_sync, .iova_to_phys = arm_smmu_iova_to_phys, - .add_device = arm_smmu_add_device, - .remove_device = arm_smmu_remove_device, + .probe_device = arm_smmu_probe_device, + .release_device = arm_smmu_release_device, .device_group = arm_smmu_device_group, .domain_get_attr = arm_smmu_domain_get_attr, .domain_set_attr = arm_smmu_domain_set_attr,