diff options
| author |   Jeffy Chen <jeffy.chen@rock-chips.com> | 2018-03-23 15:38:14 +0800 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2018-03-29 12:22:29 +0200 |
| commit | 57c26957bd87a9f3b84043d0ee9cf47852a82ff9 (patch) | |
| tree | 58c85afe16f079be47e752747d1719a5881f0927 /drivers/iommu | |
| parent | iommu/rockchip: Add runtime PM support (diff) | |
| download | linux-dev-57c26957bd87a9f3b84043d0ee9cf47852a82ff9.tar.xz linux-dev-57c26957bd87a9f3b84043d0ee9cf47852a82ff9.zip | |
iommu/rockchip: Support sharing IOMMU between masters
There would be some masters sharing the same IOMMU device. Put them in
the same iommu group and share the same iommu domain.
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/rockchip-iommu.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index 9f6f74689464..5fc8656c60f9 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -104,6 +104,7 @@ struct rk_iommu { struct iommu_device iommu; struct list_head node; /* entry in rk_iommu_domain.iommus */ struct iommu_domain *domain; /* domain to which iommu is attached */ + struct iommu_group *group; }; struct rk_iommudata { @@ -1073,6 +1074,15 @@ static void rk_iommu_remove_device(struct device *dev) iommu_group_remove_device(dev); } +static struct iommu_group *rk_iommu_device_group(struct device *dev) +{ + struct rk_iommu *iommu; + + iommu = rk_iommu_from_dev(dev); + + return iommu_group_ref_get(iommu->group); +} + static int rk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args) { @@ -1104,7 +1114,7 @@ static const struct iommu_ops rk_iommu_ops = { .add_device = rk_iommu_add_device, .remove_device = rk_iommu_remove_device, .iova_to_phys = rk_iommu_iova_to_phys, - .device_group = generic_device_group, + .device_group = rk_iommu_device_group, .pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP, .of_xlate = rk_iommu_of_xlate, }; @@ -1173,9 +1183,15 @@ static int rk_iommu_probe(struct platform_device *pdev) if (err) return err; + iommu->group = iommu_group_alloc(); + if (IS_ERR(iommu->group)) { + err = PTR_ERR(iommu->group); + goto err_unprepare_clocks; + } + err = iommu_device_sysfs_add(&iommu->iommu, dev, NULL, dev_name(dev)); if (err) - goto err_unprepare_clocks; + goto err_put_group; iommu_device_set_ops(&iommu->iommu, &rk_iommu_ops); iommu_device_set_fwnode(&iommu->iommu, &dev->of_node->fwnode); @@ -1199,6 +1215,8 @@ static int rk_iommu_probe(struct platform_device *pdev) return 0; err_remove_sysfs: iommu_device_sysfs_remove(&iommu->iommu); +err_put_group: + iommu_group_put(iommu->group); err_unprepare_clocks: clk_bulk_unprepare(iommu->num_clocks, iommu->clocks); return err; |