diff options
| author | Mitchel Humpherys <mitchelh@codeaurora.org> | 2015-12-03 11:17:23 -0800 |
|---|---|---|
| committer | Jeevan Shriram <jshriram@codeaurora.org> | 2016-05-20 19:23:56 -0700 |
| commit | e7f52c5c475be7ece4053cc4058776128a6e37c4 (patch) | |
| tree | 99ed6183e2cbafee7249f7716b21e73c5533ad11 | |
| parent | b7d9fb96e00d4d48ef580cd4d5a80daebd6e82ad (diff) | |
iommu: Add tlbi_domain op
Some higher-level DMA mappers might be able to squeeze out more
performance if TLB invalidation can be delegated to them, since they
might have more knowledge about when a stale TLB is problem than the
IOMMU driver. Add a callback for this purpose that can be implemented
by individual IOMMU drivers.
CRs-Fixed: 997751
Change-Id: If817f5514fdd5d24b9c592440760b81b88ec71a8
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
| -rw-r--r-- | include/linux/iommu.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 303768c814c3..a41f34188840 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -173,6 +173,7 @@ struct iommu_dm_region { * @trigger_fault: trigger a fault on the device attached to an iommu domain * @reg_read: read an IOMMU register * @reg_write: write an IOMMU register + * @tlbi_domain: Invalidate all TLBs covering an iommu domain * @priv: per-instance data private to the iommu driver */ struct iommu_ops { @@ -220,6 +221,7 @@ struct iommu_ops { unsigned long offset); void (*reg_write)(struct iommu_domain *domain, unsigned long val, unsigned long offset); + void (*tlbi_domain)(struct iommu_domain *domain); #ifdef CONFIG_OF_IOMMU int (*of_xlate)(struct device *dev, struct of_phandle_args *args); @@ -382,6 +384,12 @@ extern struct iommu_group *pci_device_group(struct device *dev); /* Generic device grouping function */ extern struct iommu_group *generic_device_group(struct device *dev); +static inline void iommu_tlbiall(struct iommu_domain *domain) +{ + if (domain->ops->tlbi_domain) + domain->ops->tlbi_domain(domain); +} + #else /* CONFIG_IOMMU_API */ struct iommu_ops {}; @@ -626,6 +634,10 @@ static int iommu_dma_supported(struct iommu_domain *domain, struct device *dev, return -EINVAL; } +static inline void iommu_tlbiall(struct iommu_domain *domain) +{ +} + #endif /* CONFIG_IOMMU_API */ #endif /* __LINUX_IOMMU_H */ |