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author | Joerg Roedel <jroedel@suse.de> | 2015-12-21 18:34:47 +0100 |
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committer | Joerg Roedel <jroedel@suse.de> | 2015-12-28 17:18:52 +0100 |
commit | 2a87442c5b9858cbfc43eb17da4331551d578d25 (patch) | |
tree | 61920e09675a15f4f5857e2a9c3b654b416dde50 /drivers/iommu/amd_iommu.c | |
parent | d41ab09896dcfc517a7aa050b5c8563b5682a71d (diff) | |
download | linux-stable-2a87442c5b9858cbfc43eb17da4331551d578d25.tar.gz linux-stable-2a87442c5b9858cbfc43eb17da4331551d578d25.tar.bz2 linux-stable-2a87442c5b9858cbfc43eb17da4331551d578d25.zip |
iommu/amd: Iterate over all aperture ranges in dma_ops_area_alloc
This way we don't need to care about the next_index wrapping
around in dma_ops_alloc_addresses.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
-rw-r--r-- | drivers/iommu/amd_iommu.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 62a407947b02..faf51a066e98 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -1563,35 +1563,36 @@ static unsigned long dma_ops_area_alloc(struct device *dev, unsigned long align_mask, u64 dma_mask) { - int max_index = dom->aperture_size >> APERTURE_RANGE_SHIFT; unsigned long next_bit, boundary_size, mask; unsigned long address = -1; - int i = dom->next_index; + int start = dom->next_index; + int i; mask = dma_get_seg_boundary(dev); boundary_size = mask + 1 ? ALIGN(mask + 1, PAGE_SIZE) >> PAGE_SHIFT : 1UL << (BITS_PER_LONG - PAGE_SHIFT); - for (;i < max_index; ++i) { - struct aperture_range *range = dom->aperture[i]; + for (i = 0; i < APERTURE_MAX_RANGES; ++i) { + struct aperture_range *range; + + range = dom->aperture[(start + i) % APERTURE_MAX_RANGES]; - if (range->offset >= dma_mask) - break; + if (!range || range->offset >= dma_mask) + continue; next_bit = range->next_bit; - address = dma_ops_aperture_alloc(dom, dom->aperture[i], pages, + address = dma_ops_aperture_alloc(dom, range, pages, dma_mask, boundary_size, align_mask); if (address != -1) { - address = dom->aperture[i]->offset + - (address << PAGE_SHIFT); + address = range->offset + (address << PAGE_SHIFT); dom->next_index = i; break; } - if (next_bit > dom->aperture[i]->next_bit) + if (next_bit > range->next_bit) dom->need_flush = true; } @@ -1613,13 +1614,6 @@ static unsigned long dma_ops_alloc_addresses(struct device *dev, address = dma_ops_area_alloc(dev, dom, pages, align_mask, dma_mask); - if (address == -1) { - dom->next_index = 0; - address = dma_ops_area_alloc(dev, dom, pages, align_mask, - dma_mask); - dom->need_flush = true; - } - if (unlikely(address == -1)) address = DMA_ERROR_CODE; |