| Message ID | 20200311124506.208376-8-jean-philippe@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | PCI/ATS: Device-tree support and other improvements | expand |
On Wed, Mar 11, 2020 at 01:45:02PM +0100, Jean-Philippe Brucker wrote: > 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> > --- > drivers/iommu/arm-smmu-v3.c | 18 +++--------------- > 1 file changed, 3 insertions(+), 15 deletions(-) > > diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c > index 4f0a38dae6db..87ae31ef35a1 100644 > --- a/drivers/iommu/arm-smmu-v3.c > +++ b/drivers/iommu/arm-smmu-v3.c > @@ -2592,26 +2592,14 @@ 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); > - > - if (!(smmu->features & ARM_SMMU_FEAT_ATS) || !dev_is_pci(master->dev) || > - !(fwspec->flags & IOMMU_FWSPEC_PCI_RC_ATS) || pci_ats_disabled()) > - return false; > > - pdev = to_pci_dev(master->dev); > - return !pdev->untrusted && pdev->ats_cap; > + return (smmu->features & ARM_SMMU_FEAT_ATS) && 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 Acked-by: Will Deacon <will@kernel.org> Cheers for doing this. Will
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 4f0a38dae6db..87ae31ef35a1 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -2592,26 +2592,14 @@ 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); - - if (!(smmu->features & ARM_SMMU_FEAT_ATS) || !dev_is_pci(master->dev) || - !(fwspec->flags & IOMMU_FWSPEC_PCI_RC_ATS) || pci_ats_disabled()) - return false; - pdev = to_pci_dev(master->dev); - return !pdev->untrusted && pdev->ats_cap; + return (smmu->features & ARM_SMMU_FEAT_ATS) && 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) {
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> --- drivers/iommu/arm-smmu-v3.c | 18 +++--------------- 1 file changed, 3 insertions(+), 15 deletions(-)