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iommu/arm-smmu-v3: Use pci_ats_supported() 

The new pci_ats_supported() function checks if a device supports ATS and
is allowed to use it.

Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200520152201.3309416-4-jean-philippe@linaro.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jean-Philippe Brucker 2020-05-20 17:22:02 +02:00 committed by Joerg Roedel
parent 7a441b2110
commit 0b2527a654
1 changed files with 7 additions and 13 deletions
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20
drivers/iommu/arm-smmu-v3.c
View File

@ -2652,26 +2652,20 @@ static void arm_smmu_install_ste_for_dev(struct arm_smmu_master *master)
}
}
#ifdef CONFIG_PCI_ATS
static bool arm_smmu_ats_supported(struct arm_smmu_master *master)
{
struct pci_dev *pdev;
struct device *dev = master->dev;
struct arm_smmu_device *smmu = master->smmu;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(master->dev);
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
if (!(smmu->features & ARM_SMMU_FEAT_ATS) || !dev_is_pci(master->dev) ||
!(fwspec->flags & IOMMU_FWSPEC_PCI_RC_ATS) || pci_ats_disabled())
if (!(smmu->features & ARM_SMMU_FEAT_ATS))
return false;
pdev = to_pci_dev(master->dev);
return !pdev->untrusted && pdev->ats_cap;
if (!(fwspec->flags & IOMMU_FWSPEC_PCI_RC_ATS))
return false;
return dev_is_pci(dev) && pci_ats_supported(to_pci_dev(dev));
}
#else
static bool arm_smmu_ats_supported(struct arm_smmu_master *master)
{
return false;
}
#endif
static void arm_smmu_enable_ats(struct arm_smmu_master *master)
{