From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: [PATCH 1/2] iommu/tegra: Add support for struct iommu_device Date: Thu, 10 Aug 2017 00:29:11 +0200 Message-ID: <1502317752-8792-2-git-send-email-joro@8bytes.org> References: <1502317752-8792-1-git-send-email-joro@8bytes.org> Return-path: In-Reply-To: <1502317752-8792-1-git-send-email-joro@8bytes.org> Sender: linux-kernel-owner@vger.kernel.org To: Hiroshi Doyu , Thierry Reding , Jonathan Hunter Cc: Robin Murphy , iommu@lists.linux-foundation.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, Joerg Roedel List-Id: linux-tegra@vger.kernel.org From: Joerg Roedel Add a struct iommu_device to each tegra-smmu and register it with the iommu-core. Also link devices added to the driver to their respective hardware iommus. Signed-off-by: Joerg Roedel --- drivers/iommu/tegra-smmu.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index faa9c1e..2802e12 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -36,6 +36,8 @@ struct tegra_smmu { struct list_head list; struct dentry *debugfs; + + struct iommu_device iommu; /* IOMMU Core code handle */ }; struct tegra_smmu_as { @@ -720,6 +722,9 @@ static int tegra_smmu_add_device(struct device *dev) * first match. */ dev->archdata.iommu = smmu; + + iommu_device_link(&smmu->iommu, dev); + break; } @@ -737,6 +742,11 @@ static int tegra_smmu_add_device(struct device *dev) static void tegra_smmu_remove_device(struct device *dev) { + struct tegra_smmu *smmu = dev->archdata.iommu; + + if (smmu) + iommu_device_unlink(&smmu->iommu, dev); + dev->archdata.iommu = NULL; iommu_group_remove_device(dev); } @@ -943,6 +953,18 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev, if (err < 0) return ERR_PTR(err); + err = iommu_device_sysfs_add(&smmu->iommu, dev, NULL, dev_name(dev)); + if (err) + return ERR_PTR(err); + + iommu_device_set_ops(&smmu->iommu, &tegra_smmu_ops); + + err = iommu_device_register(&smmu->iommu); + if (err) { + iommu_device_sysfs_remove(&smmu->iommu); + return ERR_PTR(err); + } + if (IS_ENABLED(CONFIG_DEBUG_FS)) tegra_smmu_debugfs_init(smmu); @@ -951,6 +973,9 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev, void tegra_smmu_remove(struct tegra_smmu *smmu) { + iommu_device_unregister(&smmu->iommu); + iommu_device_sysfs_remove(&smmu->iommu); + if (IS_ENABLED(CONFIG_DEBUG_FS)) tegra_smmu_debugfs_exit(smmu); } -- 2.7.4