[PATCH v3 14/16] iommu/intel-svm: replace dev ops with fault report API

Jacob Pan
2017-11-17T18:58:20Z

With the introduction of generic IOMMU device fault reporting API, we
can replace the private fault callback functions with standard function
and event data.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
drivers/iommu/intel-svm.c | 7 +------
include/linux/intel-svm.h | 20 +++-----------------
2 files changed, 4 insertions(+), 23 deletions(-)

diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index 77c25d8..93b1849 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -283,7 +283,7 @@ static const struct mmu_notifier_ops intel_mmuops = {

static DEFINE_MUTEX(pasid_mutex);

-int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ops *ops)
+int intel_svm_bind_mm(struct device *dev, int *pasid, int flags)
{
struct intel_iommu *iommu = intel_svm_device_to_iommu(dev);
struct intel_svm_dev *sdev;
@@ -329,10 +329,6 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_

list_for_each_entry(sdev, &svm->devs, list) {
if (dev == sdev->dev) {
- if (sdev->ops != ops) {
- ret = -EBUSY;
- goto out;
- }
sdev->users++;
goto success;
}
@@ -358,7 +354,6 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
}
/* Finish the setup now we know we're keeping it */
sdev->users = 1;
- sdev->ops = ops;
init_rcu_head(&sdev->rcu);

if (!svm) {
diff --git a/include/linux/intel-svm.h b/include/linux/intel-svm.h
index 99bc5b3..a39a502 100644
--- a/include/linux/intel-svm.h
+++ b/include/linux/intel-svm.h
@@ -18,18 +18,6 @@

struct device;

-struct svm_dev_ops {
- void (*fault_cb)(struct device *dev, int pasid, u64 address,
- u32 private, int rwxp, int response);
-};
-
-/* Values for rxwp in fault_cb callback */
-#define SVM_REQ_READ (1<<3)
-#define SVM_REQ_WRITE (1<<2)
-#define SVM_REQ_EXEC (1<<1)
-#define SVM_REQ_PRIV (1<<0)
-
-
/*
* The SVM_FLAG_PRIVATE_PASID flag requests a PASID which is *not* the "main"
* PASID for the current process. Even if a PASID already exists, a new one
@@ -60,7 +48,6 @@ struct svm_dev_ops {
* @dev: Device to be granted acccess
* @pasid: Address for allocated PASID
* @flags: Flags. Later for requesting supervisor mode, etc.
- * @ops: Callbacks to device driver
*
* This function attempts to enable PASID support for the given device.
* If the @pasid argument is non-%NULL, a PASID is allocated for access
@@ -82,8 +69,7 @@ struct svm_dev_ops {
* Multiple calls from the same process may result in the same PASID
* being re-used. A reference count is kept.
*/
-extern int intel_svm_bind_mm(struct device *dev, int *pasid, int flags,
- struct svm_dev_ops *ops);
+extern int intel_svm_bind_mm(struct device *dev, int *pasid, int flags);

/**
* intel_svm_unbind_mm() - Unbind a specified PASID
@@ -120,7 +106,7 @@ extern int intel_svm_is_pasid_valid(struct device *dev, int pasid);
#else /* CONFIG_INTEL_IOMMU_SVM */

static inline int intel_svm_bind_mm(struct device *dev, int *pasid,
- int flags, struct svm_dev_ops *ops)
+ int flags)
{
return -ENOSYS;
}
@@ -136,6 +122,6 @@ static int intel_svm_is_pasid_valid(struct device *dev, int pasid)
}
#endif /* CONFIG_INTEL_IOMMU_SVM */

-#define intel_svm_available(dev) (!intel_svm_bind_mm((dev), NULL, 0, NULL))
+#define intel_svm_available(dev) (!intel_svm_bind_mm((dev), NULL, 0))

#endif /* __INTEL_SVM_H__ */
--
2.7.4