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x86/amd-iommu: Add function to complete a tlb flush

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This patch adds a function to the AMD IOMMU driver which
completes all queued commands an all IOMMUs a specific
domain has devices attached on. This is required in a later
patch when per-domain flushing is implemented.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-11-20 16:00:05 +01:00
parent c459611424
commit 0518a3a458
1 changed files with 22 additions and 6 deletions
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28
arch/x86/kernel/amd_iommu.c
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@ -376,6 +376,22 @@ out:
return 0;
}
static void iommu_flush_complete(struct protection_domain *domain)
{
int i;
for (i = 0; i < amd_iommus_present; ++i) {
if (!domain->dev_iommu[i])
continue;
/*
* Devices of this domain are behind this IOMMU
* We need to wait for completion of all commands.
*/
iommu_completion_wait(amd_iommus[i]);
}
}
/*
* Command send function for invalidating a device table entry
*/
@ -1758,7 +1774,7 @@ static dma_addr_t map_page(struct device *dev, struct page *page,
if (addr == DMA_ERROR_CODE)
goto out;
iommu_completion_wait(iommu);
iommu_flush_complete(domain);
out:
spin_unlock_irqrestore(&domain->lock, flags);
@ -1791,7 +1807,7 @@ static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
__unmap_single(iommu, domain->priv, dma_addr, size, dir);
iommu_completion_wait(iommu);
iommu_flush_complete(domain);
spin_unlock_irqrestore(&domain->lock, flags);
}
@ -1863,7 +1879,7 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
goto unmap;
}
iommu_completion_wait(iommu);
iommu_flush_complete(domain);
out:
spin_unlock_irqrestore(&domain->lock, flags);
@ -1914,7 +1930,7 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist,
s->dma_address = s->dma_length = 0;
}
iommu_completion_wait(iommu);
iommu_flush_complete(domain);
spin_unlock_irqrestore(&domain->lock, flags);
}
@ -1969,7 +1985,7 @@ static void *alloc_coherent(struct device *dev, size_t size,
goto out_free;
}
iommu_completion_wait(iommu);
iommu_flush_complete(domain);
spin_unlock_irqrestore(&domain->lock, flags);
@ -2010,7 +2026,7 @@ static void free_coherent(struct device *dev, size_t size,
__unmap_single(iommu, domain->priv, dma_addr, size, DMA_BIDIRECTIONAL);
iommu_completion_wait(iommu);
iommu_flush_complete(domain);
spin_unlock_irqrestore(&domain->lock, flags);