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| author |   Lu Baolu <baolu.lu@linux.intel.com> | 2019-05-25 13:41:22 +0800 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2019-05-27 16:56:43 +0200 |
| commit | 7423e01741dd6a5f1255f589145313f0fb1c8cbe (patch) | |
| tree | eb44248edd0bf337856bc56e879169662494b31a /include/linux/iommu.h | |
| parent | iommu/vt-d: Add debugfs support to show scalable mode DMAR table internals (diff) | |
| download | wireguard-linux-7423e01741dd6a5f1255f589145313f0fb1c8cbe.tar.xz wireguard-linux-7423e01741dd6a5f1255f589145313f0fb1c8cbe.zip | |
iommu: Add API to request DMA domain for device
Normally during iommu probing a device, a default doamin will
be allocated and attached to the device. The domain type of
the default domain is statically defined, which results in a
situation where the allocated default domain isn't suitable
for the device due to some limitations. We already have API
iommu_request_dm_for_dev() to replace a DMA domain with an
identity one. This adds iommu_request_dma_domain_for_dev()
to request a dma domain if an allocated identity domain isn't
suitable for the device in question.
Signed-off-by: Lu Baolu <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 | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index a815cf6f6f47..91af22a344e2 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -362,6 +362,7 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain, extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); extern int iommu_request_dm_for_dev(struct device *dev); +extern int iommu_request_dma_domain_for_dev(struct device *dev); extern struct iommu_resv_region * iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, enum iommu_resv_type type); @@ -626,6 +627,11 @@ static inline int iommu_request_dm_for_dev(struct device *dev) return -ENODEV; } +static inline int iommu_request_dma_domain_for_dev(struct device *dev) +{ + return -ENODEV; +} + static inline int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group) { |