diff options
| author | Lu Baolu <baolu.lu@linux.intel.com> | 2022-02-16 05:52:47 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-02-28 15:25:49 +0300 |
| commit | 3f6634d997dba8140b3a7cba01776b9638d70dff (patch) | |
| tree | 675638a8a5438a2b24c8898fcc7fb3001243c64a /include/linux/iommu.h | |
| parent | 7eef7f670086f06b3a461f1b4d1e84f793ed4861 (diff) | |
| download | linux-3f6634d997dba8140b3a7cba01776b9638d70dff.tar.xz | |
iommu: Use right way to retrieve iommu_ops
The common iommu_ops is hooked to both device and domain. When a helper
has both device and domain pointer, the way to get the iommu_ops looks
messy in iommu core. This sorts out the way to get iommu_ops. The device
related helpers go through device pointer, while the domain related ones
go through domain pointer.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20220216025249.3459465-8-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 9ffa2e88f3d0..90f1b5e3809d 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -381,6 +381,17 @@ static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather) }; } +static inline const struct iommu_ops *dev_iommu_ops(struct device *dev) +{ + /* + * Assume that valid ops must be installed if iommu_probe_device() + * has succeeded. The device ops are essentially for internal use + * within the IOMMU subsystem itself, so we should be able to trust + * ourselves not to misuse the helper. + */ + return dev->iommu->iommu_dev->ops; +} + #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */ #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */ #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */ |