diff options
author | Joerg Roedel | 2015-12-21 16:20:09 +0100 |
---|---|---|
committer | Joerg Roedel | 2015-12-28 17:18:51 +0100 |
commit | a0f51447f4accd8f0f9420d8e617dd4e371504d7 (patch) | |
tree | 93fec15facaa310a6a232027d5c58ada53b39747 /drivers/iommu | |
parent | b57c3c802e51e83620b739759c8bba829e231b57 (diff) |
iommu/amd: Add dma_ops_aperture_alloc() function
Make this a wrapper around iommu_ops_area_alloc() for now
and add more logic to this function later on.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r-- | drivers/iommu/amd_iommu.c | 37 |
1 files changed, 25 insertions, 12 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 1d1ef374a5a8..be0e81aff3bc 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -1518,6 +1518,28 @@ out_free: return -ENOMEM; } +static dma_addr_t dma_ops_aperture_alloc(struct aperture_range *range, + unsigned long pages, + unsigned long next_bit, + unsigned long dma_mask, + unsigned long boundary_size, + unsigned long align_mask) +{ + unsigned long offset, limit, flags; + dma_addr_t address; + + offset = range->offset >> PAGE_SHIFT; + limit = iommu_device_max_index(APERTURE_RANGE_PAGES, offset, + dma_mask >> PAGE_SHIFT); + + spin_lock_irqsave(&range->bitmap_lock, flags); + address = iommu_area_alloc(range->bitmap, limit, next_bit, pages, + offset, boundary_size, align_mask); + spin_unlock_irqrestore(&range->bitmap_lock, flags); + + return address; +} + static unsigned long dma_ops_area_alloc(struct device *dev, struct dma_ops_domain *dom, unsigned int pages, @@ -1530,8 +1552,6 @@ static unsigned long dma_ops_area_alloc(struct device *dev, int i = start >> APERTURE_RANGE_SHIFT; unsigned long boundary_size, mask; unsigned long address = -1; - unsigned long limit; - unsigned long flags; next_bit >>= PAGE_SHIFT; @@ -1541,19 +1561,12 @@ static unsigned long dma_ops_area_alloc(struct device *dev, 1UL << (BITS_PER_LONG - PAGE_SHIFT); for (;i < max_index; ++i) { - unsigned long offset = dom->aperture[i]->offset >> PAGE_SHIFT; - if (dom->aperture[i]->offset >= dma_mask) break; - limit = iommu_device_max_index(APERTURE_RANGE_PAGES, offset, - dma_mask >> PAGE_SHIFT); - - spin_lock_irqsave(&dom->aperture[i]->bitmap_lock, flags); - address = iommu_area_alloc(dom->aperture[i]->bitmap, - limit, next_bit, pages, offset, - boundary_size, align_mask); - spin_unlock_irqrestore(&dom->aperture[i]->bitmap_lock, flags); + address = dma_ops_aperture_alloc(dom->aperture[i], pages, + next_bit, dma_mask, + boundary_size, align_mask); if (address != -1) { address = dom->aperture[i]->offset + (address << PAGE_SHIFT); |