[RFC,14/34] iommu/amd: Remove dev_data->passthrough

Commit Message

Joerg Roedel April 7, 2020, 6:37 p.m. UTC

From: Joerg Roedel <[e-mail]>

Make use of generic IOMMU infrastructure to gather the same information
carried in dev_data->passthrough and remove the struct member.

Signed-off-by: Joerg Roedel <[e-mail]>
---
 drivers/iommu/amd_iommu.c       | 10 +++++-----
 drivers/iommu/amd_iommu_types.h |  1 -
 2 files changed, 5 insertions(+), 6 deletions(-)

Patch

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 3e0d27f7622e..0b4b4faa876d 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2047,8 +2047,8 @@  static int pdev_iommuv2_enable(struct pci_dev *pdev)
 static int attach_device(struct device *dev,
 			 struct protection_domain *domain)
 {
-	struct pci_dev *pdev;
 	struct iommu_dev_data *dev_data;
+	struct pci_dev *pdev;
 	unsigned long flags;
 	int ret;
 
@@ -2067,8 +2067,10 @@  static int attach_device(struct device *dev,
 
 	pdev = to_pci_dev(dev);
 	if (domain->flags & PD_IOMMUV2_MASK) {
+		struct iommu_domain *def_domain = iommu_get_dma_domain(dev);
+
 		ret = -EINVAL;
-		if (!dev_data->passthrough)
+		if (def_domain->type != IOMMU_DOMAIN_IDENTITY)
 			goto out;
 
 		if (dev_data->iommu_v2) {
@@ -2189,9 +2191,7 @@  static int amd_iommu_add_device(struct device *dev)
 
 	/* Domains are initialized for this device - have a look what we ended up with */
 	domain = iommu_get_domain_for_dev(dev);
-	if (domain->type == IOMMU_DOMAIN_IDENTITY)
-		dev_data->passthrough = true;
-	else if (domain->type == IOMMU_DOMAIN_DMA)
+	if (domain->type == IOMMU_DOMAIN_DMA)
 		iommu_setup_dma_ops(dev, IOVA_START_PFN << PAGE_SHIFT, 0);
 
 out:
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index ca8c4522045b..d0d7b6a0c3d8 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -640,7 +640,6 @@  struct iommu_dev_data {
 	struct pci_dev *pdev;
 	u16 devid;			  /* PCI Device ID */
 	bool iommu_v2;			  /* Device can make use of IOMMUv2 */
-	bool passthrough;		  /* Device is identity mapped */
 	struct {
 		bool enabled;
 		int qdep;