diff options
| author | Joerg Roedel <jroedel@suse.de> | 2017-04-12 08:21:31 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2017-04-20 17:33:59 +0300 |
| commit | 28ae1e3e14f32c70913e4ebf4aeff7959ed03f84 (patch) | |
| tree | 4f55396074219440903d36eced10e3862b9f6887 /drivers/iommu | |
| parent | 01611fe8478bf582af0c33d5853137dd25b72f2f (diff) | |
| download | linux-28ae1e3e14f32c70913e4ebf4aeff7959ed03f84.tar.xz | |
iommu/omap: Add iommu-group support
Support for IOMMU groups will become mandatory for drivers,
so add it to the omap iommu driver.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
[s-anna@ti.com: minor error cleanups]
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/omap-iommu.c | 39 | ||||
| -rw-r--r-- | drivers/iommu/omap-iommu.h | 1 |
2 files changed, 39 insertions, 1 deletions
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index ef44fc740da7..95dfca36ccb9 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -943,9 +943,13 @@ static int omap_iommu_probe(struct platform_device *pdev) return err; platform_set_drvdata(pdev, obj); + obj->group = iommu_group_alloc(); + if (IS_ERR(obj->group)) + return PTR_ERR(obj->group); + err = iommu_device_sysfs_add(&obj->iommu, obj->dev, NULL, obj->name); if (err) - return err; + goto out_group; iommu_device_set_ops(&obj->iommu, &omap_iommu_ops); @@ -959,10 +963,13 @@ static int omap_iommu_probe(struct platform_device *pdev) omap_iommu_debugfs_add(obj); dev_info(&pdev->dev, "%s registered\n", obj->name); + return 0; out_sysfs: iommu_device_sysfs_remove(&obj->iommu); +out_group: + iommu_group_put(obj->group); return err; } @@ -970,6 +977,9 @@ static int omap_iommu_remove(struct platform_device *pdev) { struct omap_iommu *obj = platform_get_drvdata(pdev); + iommu_group_put(obj->group); + obj->group = NULL; + iommu_device_sysfs_remove(&obj->iommu); iommu_device_unregister(&obj->iommu); @@ -1217,6 +1227,7 @@ static int omap_iommu_add_device(struct device *dev) { struct omap_iommu_arch_data *arch_data; struct omap_iommu *oiommu; + struct iommu_group *group; struct device_node *np; struct platform_device *pdev; int ret; @@ -1262,6 +1273,19 @@ static int omap_iommu_add_device(struct device *dev) arch_data->iommu_dev = oiommu; dev->archdata.iommu = arch_data; + /* + * IOMMU group initialization calls into omap_iommu_device_group, which + * needs a valid dev->archdata.iommu pointer + */ + group = iommu_group_get_for_dev(dev); + if (IS_ERR(group)) { + iommu_device_unlink(&oiommu->iommu, dev); + dev->archdata.iommu = NULL; + kfree(arch_data); + return PTR_ERR(group); + } + iommu_group_put(group); + of_node_put(np); return 0; @@ -1275,12 +1299,24 @@ static void omap_iommu_remove_device(struct device *dev) return; iommu_device_unlink(&arch_data->iommu_dev->iommu, dev); + iommu_group_remove_device(dev); dev->archdata.iommu = NULL; kfree(arch_data); } +static struct iommu_group *omap_iommu_device_group(struct device *dev) +{ + struct omap_iommu_arch_data *arch_data = dev->archdata.iommu; + struct iommu_group *group = NULL; + + if (arch_data->iommu_dev) + group = arch_data->iommu_dev->group; + + return group; +} + static const struct iommu_ops omap_iommu_ops = { .domain_alloc = omap_iommu_domain_alloc, .domain_free = omap_iommu_domain_free, @@ -1292,6 +1328,7 @@ static const struct iommu_ops omap_iommu_ops = { .iova_to_phys = omap_iommu_iova_to_phys, .add_device = omap_iommu_add_device, .remove_device = omap_iommu_remove_device, + .device_group = omap_iommu_device_group, .pgsize_bitmap = OMAP_IOMMU_PGSIZES, }; diff --git a/drivers/iommu/omap-iommu.h b/drivers/iommu/omap-iommu.h index 758958a4712c..6e70515e6038 100644 --- a/drivers/iommu/omap-iommu.h +++ b/drivers/iommu/omap-iommu.h @@ -70,6 +70,7 @@ struct omap_iommu { u32 id; struct iommu_device iommu; + struct iommu_group *group; }; /** |