[PATCH v3 14/34] iommu/amd: Remove dev_data->passthrough

Joerg Roedel
2020-04-29T13:37:56Z

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 <jroedel@suse.de>
---
drivers/iommu/amd_iommu.c | 10 +++++-----
drivers/iommu/amd_iommu_types.h | 1 -
2 files changed, 5 insertions(+), 6 deletions(-)

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;