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x86, AMD IOMMU: add dma_ops mapping functions for single mappings 

This patch adds the dma_ops specific mapping functions for single mappings.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Joerg Roedel 2008-06-26 21:28:01 +02:00 committed by Ingo Molnar
parent cb76c32297
commit 4da70b9e4f
1 changed files with 59 additions and 0 deletions
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59
arch/x86/kernel/amd_iommu.c
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@ -40,6 +40,11 @@ struct command {
static int dma_ops_unity_map(struct dma_ops_domain *dma_dom,
struct unity_map_entry *e);
static int iommu_has_npcache(struct amd_iommu *iommu)
{
return iommu->cap & IOMMU_CAP_NPCACHE;
}
static int __iommu_queue_command(struct amd_iommu *iommu, struct command *cmd)
{
u32 tail, head;
@ -641,3 +646,57 @@ static void __unmap_single(struct amd_iommu *iommu,
dma_ops_free_addresses(dma_dom, dma_addr, pages);
}
static dma_addr_t map_single(struct device *dev, phys_addr_t paddr,
size_t size, int dir)
{
unsigned long flags;
struct amd_iommu *iommu;
struct protection_domain *domain;
u16 devid;
dma_addr_t addr;
get_device_resources(dev, &iommu, &domain, &devid);
if (iommu == NULL || domain == NULL)
return (dma_addr_t)paddr;
spin_lock_irqsave(&domain->lock, flags);
addr = __map_single(dev, iommu, domain->priv, paddr, size, dir);
if (addr == bad_dma_address)
goto out;
if (iommu_has_npcache(iommu))
iommu_flush_pages(iommu, domain->id, addr, size);
if (iommu->need_sync)
iommu_completion_wait(iommu);
out:
spin_unlock_irqrestore(&domain->lock, flags);
return addr;
}
static void unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size, int dir)
{
unsigned long flags;
struct amd_iommu *iommu;
struct protection_domain *domain;
u16 devid;
if (!get_device_resources(dev, &iommu, &domain, &devid))
return;
spin_lock_irqsave(&domain->lock, flags);
__unmap_single(iommu, domain->priv, dma_addr, size, dir);
iommu_flush_pages(iommu, domain->id, dma_addr, size);
if (iommu->need_sync)
iommu_completion_wait(iommu);
spin_unlock_irqrestore(&domain->lock, flags);
}