From: Lu Baolu <baolu.lu@linux.intel.com> To: Joerg Roedel <joro@8bytes.org> Cc: Will Deacon <will@kernel.org>, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Lu Baolu <baolu.lu@linux.intel.com> Subject: [PATCH 1/1] iommu/vt-d: Delete dev_has_feat callback Date: Wed, 29 Sep 2021 15:20:30 +0800 [thread overview] Message-ID: <20210929072030.1330225-1-baolu.lu@linux.intel.com> (raw) 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> --- 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 01162b0b9712..dc733de9eea5 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -5516,62 +5516,14 @@ 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 @@ -5582,7 +5534,7 @@ 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); @@ -5708,7 +5660,6 @@ 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, -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Lu Baolu <baolu.lu@linux.intel.com> To: Joerg Roedel <joro@8bytes.org> Cc: iommu@lists.linux-foundation.org, Will Deacon <will@kernel.org>, linux-kernel@vger.kernel.org Subject: [PATCH 1/1] iommu/vt-d: Delete dev_has_feat callback Date: Wed, 29 Sep 2021 15:20:30 +0800 [thread overview] Message-ID: <20210929072030.1330225-1-baolu.lu@linux.intel.com> (raw) 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> --- 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 01162b0b9712..dc733de9eea5 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -5516,62 +5516,14 @@ 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 @@ -5582,7 +5534,7 @@ 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); @@ -5708,7 +5660,6 @@ 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, -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next reply other threads:[~2021-09-29 7:24 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-09-29 7:20 Lu Baolu [this message] 2021-09-29 7:20 ` [PATCH 1/1] iommu/vt-d: Delete dev_has_feat callback Lu Baolu
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