[PATCH 6/9] iommu/vt-d: Delete dev_has_feat callback

Lu Baolu
2021-10-14T05:42:58Z

The commit 262948f8ba573 ("iommu: Delete iommu_dev_has_feature()") has
deleted the iommu_dev_has_feature() interface. Remove the dev_has_feat
callback to avoid dead code.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210929072030.1330225-1-baolu.lu@linux.intel.com
---
drivers/iommu/intel/iommu.c | 59 ++++---------------------------------
1 file changed, 5 insertions(+), 54 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 1c26a7a012ce..16a35669a9d0 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -5511,62 +5511,14 @@ static int intel_iommu_disable_sva(struct device *dev)
return ret;
}

-/*
- * A PCI express designated vendor specific extended capability is defined
- * in the section 3.7 of Intel scalable I/O virtualization technical spec
- * for system software and tools to detect endpoint devices supporting the
- * Intel scalable IO virtualization without host driver dependency.
- *
- * Returns the address of the matching extended capability structure within
- * the device's PCI configuration space or 0 if the device does not support
- * it.
- */
-static int siov_find_pci_dvsec(struct pci_dev *pdev)
-{
- int pos;
- u16 vendor, id;
-
- pos = pci_find_next_ext_capability(pdev, 0, 0x23);
- while (pos) {
- pci_read_config_word(pdev, pos + 4, &vendor);
- pci_read_config_word(pdev, pos + 8, &id);
- if (vendor == PCI_VENDOR_ID_INTEL && id == 5)
- return pos;
-
- pos = pci_find_next_ext_capability(pdev, pos, 0x23);
- }
-
- return 0;
-}
-
-static bool
-intel_iommu_dev_has_feat(struct device *dev, enum iommu_dev_features feat)
+static int intel_iommu_enable_iopf(struct device *dev)
{
struct device_domain_info *info = get_domain_info(dev);

- if (feat == IOMMU_DEV_FEAT_AUX) {
- int ret;
-
- if (!dev_is_pci(dev) || dmar_disabled ||
- !scalable_mode_support() || !pasid_mode_support())
- return false;
-
- ret = pci_pasid_features(to_pci_dev(dev));
- if (ret < 0)
- return false;
-
- return !!siov_find_pci_dvsec(to_pci_dev(dev));
- }
-
- if (feat == IOMMU_DEV_FEAT_IOPF)
- return info && info->pri_supported;
-
- if (feat == IOMMU_DEV_FEAT_SVA)
- return info && (info->iommu->flags & VTD_FLAG_SVM_CAPABLE) &&
- info->pasid_supported && info->pri_supported &&
- info->ats_supported;
+ if (info && info->pri_supported)
+ return 0;

- return false;
+ return -ENODEV;
}

static int
@@ -5577,7 +5529,7 @@ intel_iommu_dev_enable_feat(struct device *dev, enum iommu_dev_features feat)
return intel_iommu_enable_auxd(dev);

case IOMMU_DEV_FEAT_IOPF:
- return intel_iommu_dev_has_feat(dev, feat) ? 0 : -ENODEV;
+ return intel_iommu_enable_iopf(dev);

case IOMMU_DEV_FEAT_SVA:
return intel_iommu_enable_sva(dev);
@@ -5703,7 +5655,6 @@ const struct iommu_ops intel_iommu_ops = {
.get_resv_regions = intel_iommu_get_resv_regions,
.put_resv_regions = generic_iommu_put_resv_regions,
.device_group = intel_iommu_device_group,
- .dev_has_feat = intel_iommu_dev_has_feat,
.dev_feat_enabled = intel_iommu_dev_feat_enabled,
.dev_enable_feat = intel_iommu_dev_enable_feat,
.dev_disable_feat = intel_iommu_dev_disable_feat,