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intel-iommu: Tidy up iommu->gcmd handling

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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse
2009-05-10 20:30:58 +01:00
parent 462b60f6cc
commit c416daa98a
3 changed files with 15 additions and 20 deletions
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18
drivers/pci/intel-iommu.c
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@@ -819,7 +819,7 @@ static int iommu_alloc_root_entry(struct intel_iommu *iommu)
static void iommu_set_root_entry(struct intel_iommu *iommu)
{
void *addr;
u32 cmd, sts;
u32 sts;
unsigned long flag;
addr = iommu->root_entry;
@@ -827,12 +827,11 @@ static void iommu_set_root_entry(struct intel_iommu *iommu)
spin_lock_irqsave(&iommu->register_lock, flag);
dmar_writeq(iommu->reg + DMAR_RTADDR_REG, virt_to_phys(addr));
cmd = iommu->gcmd | DMA_GCMD_SRTP;
writel(cmd, iommu->reg + DMAR_GCMD_REG);
writel(iommu->gcmd | DMA_GCMD_SRTP, iommu->reg + DMAR_GCMD_REG);
/* Make sure hardware complete it */
IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG,
readl, (sts & DMA_GSTS_RTPS), sts);
readl, (sts & DMA_GSTS_RTPS), sts);
spin_unlock_irqrestore(&iommu->register_lock, flag);
}
@@ -844,12 +843,13 @@ static void iommu_flush_write_buffer(struct intel_iommu *iommu)
if (!rwbf_quirk && !cap_rwbf(iommu->cap))
return;
spin_lock_irqsave(&iommu->register_lock, flag);
writel(iommu->gcmd | DMA_GCMD_WBF, iommu->reg + DMAR_GCMD_REG);
/* Make sure hardware complete it */
IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG,
readl, (!(val & DMA_GSTS_WBFS)), val);
readl, (!(val & DMA_GSTS_WBFS)), val);
spin_unlock_irqrestore(&iommu->register_lock, flag);
}
@@ -995,13 +995,13 @@ static int iommu_enable_translation(struct intel_iommu *iommu)
unsigned long flags;
spin_lock_irqsave(&iommu->register_lock, flags);
writel(iommu->gcmd|DMA_GCMD_TE, iommu->reg + DMAR_GCMD_REG);
iommu->gcmd |= DMA_GCMD_TE;
writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG);
/* Make sure hardware complete it */
IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG,
readl, (sts & DMA_GSTS_TES), sts);
readl, (sts & DMA_GSTS_TES), sts);
iommu->gcmd |= DMA_GCMD_TE;
spin_unlock_irqrestore(&iommu->register_lock, flags);
return 0;
}
@@ -1017,7 +1017,7 @@ static int iommu_disable_translation(struct intel_iommu *iommu)
/* Make sure hardware complete it */
IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG,
readl, (!(sts & DMA_GSTS_TES)), sts);
readl, (!(sts & DMA_GSTS_TES)), sts);
spin_unlock_irqrestore(&iommu->register_lock, flag);
return 0;