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iommu: Pass struct iommu_iotlb_gather to ->unmap() and ->iotlb_sync()

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To allow IOMMU drivers to batch up TLB flushing operations and postpone
them until ->iotlb_sync() is called, extend the prototypes for the
->unmap() and ->iotlb_sync() IOMMU ops callbacks to take a pointer to
the current iommu_iotlb_gather structure.

All affected IOMMU drivers are updated, but there should be no
functional change since the extra parameter is ignored for now.

Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Will Deacon
2019-07-02 16:44:06 +01:00
parent 4fcf8544fc
commit 56f8af5e9d
18 changed files with 73 additions and 33 deletions
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12
drivers/iommu/tegra-gart.c
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@@ -207,7 +207,7 @@ static inline int __gart_iommu_unmap(struct gart_device *gart,
}
static size_t gart_iommu_unmap(struct iommu_domain *domain, unsigned long iova,
size_t bytes)
size_t bytes, struct iommu_iotlb_gather *gather)
{
struct gart_device *gart = gart_handle;
int err;
@@ -273,11 +273,17 @@ static int gart_iommu_of_xlate(struct device *dev,
return 0;
}
static void gart_iommu_sync(struct iommu_domain *domain)
static void gart_iommu_sync_map(struct iommu_domain *domain)
{
FLUSH_GART_REGS(gart_handle);
}
static void gart_iommu_sync(struct iommu_domain *domain,
struct iommu_iotlb_gather *gather)
{
gart_iommu_sync_map(domain);
}
static const struct iommu_ops gart_iommu_ops = {
.capable = gart_iommu_capable,
.domain_alloc = gart_iommu_domain_alloc,
@@ -292,7 +298,7 @@ static const struct iommu_ops gart_iommu_ops = {
.iova_to_phys = gart_iommu_iova_to_phys,
.pgsize_bitmap = GART_IOMMU_PGSIZES,
.of_xlate = gart_iommu_of_xlate,
.iotlb_sync_map = gart_iommu_sync,
.iotlb_sync_map = gart_iommu_sync_map,
.iotlb_sync = gart_iommu_sync,
};