iommu/vt-d: Use dev_iommu_priv_get/set()

Remove the use of dev->archdata.iommu and use the private per-device
pointer provided by IOMMU core code instead.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20200625130836.1916-3-joro@8bytes.org

diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
index 9b105b8..e086019 100644 (file)
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
@@ -24,6 +24,7 @@
 
 #include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
+#include <linux/iommu.h>
 
 #include <drm/drm_managed.h>
 
@@ -118,6 +119,9 @@ struct drm_i915_private *mock_gem_device(void)
 {
        struct drm_i915_private *i915;
        struct pci_dev *pdev;
+#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
+       struct dev_iommu iommu;
+#endif
        int err;
 
        pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
@@ -136,8 +140,10 @@ struct drm_i915_private *mock_gem_device(void)
        dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 
 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
-       /* hack to disable iommu for the fake device; force identity mapping */
-       pdev->dev.archdata.iommu = (void *)-1;
+       /* HACK HACK HACK to disable iommu for the fake device; force identity mapping */
+       memset(&iommu, 0, sizeof(iommu));
+       iommu.priv = (void *)-1;
+       pdev->dev.iommu = &iommu;
 #endif
 
        pci_set_drvdata(pdev, i915);

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index d759e72..2ce490c 100644 (file)
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -372,7 +372,7 @@ struct device_domain_info *get_domain_info(struct device *dev)
        if (!dev)
                return NULL;
 
-       info = dev->archdata.iommu;
+       info = dev_iommu_priv_get(dev);
        if (unlikely(info == DUMMY_DEVICE_DOMAIN_INFO ||
                     info == DEFER_DEVICE_DOMAIN_INFO))
                return NULL;
@@ -743,12 +743,12 @@ struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
 
 static int iommu_dummy(struct device *dev)
 {
-       return dev->archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO;
+       return dev_iommu_priv_get(dev) == DUMMY_DEVICE_DOMAIN_INFO;
 }
 
 static bool attach_deferred(struct device *dev)
 {
-       return dev->archdata.iommu == DEFER_DEVICE_DOMAIN_INFO;
+       return dev_iommu_priv_get(dev) == DEFER_DEVICE_DOMAIN_INFO;
 }
 
 /**
@@ -2420,7 +2420,7 @@ static inline void unlink_domain_info(struct device_domain_info *info)
        list_del(&info->link);
        list_del(&info->global);
        if (info->dev)
-               info->dev->archdata.iommu = NULL;
+               dev_iommu_priv_set(info->dev, NULL);
 }
 
 static void domain_remove_dev_info(struct dmar_domain *domain)
@@ -2453,7 +2453,7 @@ static void do_deferred_attach(struct device *dev)
 {
        struct iommu_domain *domain;
 
-       dev->archdata.iommu = NULL;
+       dev_iommu_priv_set(dev, NULL);
        domain = iommu_get_domain_for_dev(dev);
        if (domain)
                intel_iommu_attach_device(domain, dev);
@@ -2599,7 +2599,7 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
        list_add(&info->link, &domain->devices);
        list_add(&info->global, &device_domain_list);
        if (dev)
-               dev->archdata.iommu = info;
+               dev_iommu_priv_set(dev, info);
        spin_unlock_irqrestore(&device_domain_lock, flags);
 
        /* PASID table is mandatory for a PCI device in scalable mode. */
@@ -4004,7 +4004,7 @@ static void quirk_ioat_snb_local_iommu(struct pci_dev *pdev)
        if (!drhd || drhd->reg_base_addr - vtbar != 0xa000) {
                pr_warn_once(FW_BUG "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n");
                add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
-               pdev->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO;
+               dev_iommu_priv_set(&pdev->dev, DUMMY_DEVICE_DOMAIN_INFO);
        }
 }
 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quirk_ioat_snb_local_iommu);
@@ -4043,7 +4043,7 @@ static void __init init_no_remapping_devices(void)
                        drhd->ignored = 1;
                        for_each_active_dev_scope(drhd->devices,
                                                  drhd->devices_cnt, i, dev)
-                               dev->archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO;
+                               dev_iommu_priv_set(dev, DUMMY_DEVICE_DOMAIN_INFO);
                }
        }
 }
@@ -5665,7 +5665,7 @@ static struct iommu_device *intel_iommu_probe_device(struct device *dev)
                return ERR_PTR(-ENODEV);
 
        if (translation_pre_enabled(iommu))
-               dev->archdata.iommu = DEFER_DEVICE_DOMAIN_INFO;
+               dev_iommu_priv_set(dev, DEFER_DEVICE_DOMAIN_INFO);
 
        return &iommu->iommu;
 }