iommu: Merge iommu_fault_event and iopf_fault

The iommu_fault_event and iopf_fault data structures store the same
information about an iopf fault. They are also used in the same way.
Merge these two data structures into a single one to make the code
more concise and easier to maintain.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Tested-by: Yan Zhao <yan.y.zhao@intel.com>
Tested-by: Longfang Liu <liulongfang@huawei.com>
Link: https://lore.kernel.org/r/20240212012227.119381-8-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

5 files changed, 9 insertions, 15 deletions

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 4cf1054ed321e..ab4f04c7f932a 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -922,7 +922,7 @@ static int arm_smmu_cmdq_batch_submit(struct arm_smmu_device *smmu,
 }
 
 static int arm_smmu_page_response(struct device *dev,
-				  struct iommu_fault_event *unused,
+				  struct iopf_fault *unused,
 				  struct iommu_page_response *resp)
 {
 	struct arm_smmu_cmdq_ent cmd = {0};
@@ -1465,7 +1465,7 @@ static int arm_smmu_handle_evt(struct arm_smmu_device *smmu, u64 *evt)
 	struct arm_smmu_master *master;
 	bool ssid_valid = evt[0] & EVTQ_0_SSV;
 	u32 sid = FIELD_GET(EVTQ_0_SID, evt[0]);
-	struct iommu_fault_event fault_evt = { };
+	struct iopf_fault fault_evt = { };
 	struct iommu_fault *flt = &fault_evt.fault;
 
 	switch (FIELD_GET(EVTQ_0_ID, evt[0])) {
diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h
index d02f916d8e59a..696d95293a69d 100644
--- a/drivers/iommu/intel/iommu.h
+++ b/drivers/iommu/intel/iommu.h
@@ -1079,7 +1079,7 @@ struct iommu_domain *intel_nested_domain_alloc(struct iommu_domain *parent,
 void intel_svm_check(struct intel_iommu *iommu);
 int intel_svm_enable_prq(struct intel_iommu *iommu);
 int intel_svm_finish_prq(struct intel_iommu *iommu);
-int intel_svm_page_response(struct device *dev, struct iommu_fault_event *evt,
+int intel_svm_page_response(struct device *dev, struct iopf_fault *evt,
 			    struct iommu_page_response *msg);
 struct iommu_domain *intel_svm_domain_alloc(void);
 void intel_svm_remove_dev_pasid(struct device *dev, ioasid_t pasid);
diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 40edd282903fb..9751f037e188e 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -565,13 +565,12 @@ static int prq_to_iommu_prot(struct page_req_dsc *req)
 static int intel_svm_prq_report(struct intel_iommu *iommu, struct device *dev,
 				struct page_req_dsc *desc)
 {
-	struct iommu_fault_event event;
+	struct iopf_fault event = { };
 
 	if (!dev || !dev_is_pci(dev))
 		return -ENODEV;
 
 	/* Fill in event data for device specific processing */
-	memset(&event, 0, sizeof(struct iommu_fault_event));
 	event.fault.type = IOMMU_FAULT_PAGE_REQ;
 	event.fault.prm.addr = (u64)desc->addr << VTD_PAGE_SHIFT;
 	event.fault.prm.pasid = desc->pasid;
@@ -743,7 +742,7 @@ prq_advance:
 }
 
 int intel_svm_page_response(struct device *dev,
-			    struct iommu_fault_event *evt,
+			    struct iopf_fault *evt,
 			    struct iommu_page_response *msg)
 {
 	struct device_domain_info *info = dev_iommu_priv_get(dev);
diff --git a/drivers/iommu/io-pgfault.c b/drivers/iommu/io-pgfault.c
index 4fda01de55898..10d48eb72608c 100644
--- a/drivers/iommu/io-pgfault.c
+++ b/drivers/iommu/io-pgfault.c
@@ -25,11 +25,6 @@ struct iopf_queue {
 	struct mutex			lock;
 };
 
-struct iopf_fault {
-	struct iommu_fault		fault;
-	struct list_head		list;
-};
-
 struct iopf_group {
 	struct iopf_fault		last_fault;
 	struct list_head		faults;
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 5cb81dbe8d9d1..15d7b2914780a 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1341,10 +1341,10 @@ EXPORT_SYMBOL_GPL(iommu_group_put);
  *
  * Return 0 on success, or an error.
  */
-int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
+int iommu_report_device_fault(struct device *dev, struct iopf_fault *evt)
 {
 	struct dev_iommu *param = dev->iommu;
-	struct iommu_fault_event *evt_pending = NULL;
+	struct iopf_fault *evt_pending = NULL;
 	struct iommu_fault_param *fparam;
 	int ret = 0;
 
@@ -1357,7 +1357,7 @@ int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
 
 	if (evt->fault.type == IOMMU_FAULT_PAGE_REQ &&
 	    (evt->fault.prm.flags & IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE)) {
-		evt_pending = kmemdup(evt, sizeof(struct iommu_fault_event),
+		evt_pending = kmemdup(evt, sizeof(struct iopf_fault),
 				      GFP_KERNEL);
 		if (!evt_pending) {
 			ret = -ENOMEM;
@@ -1386,7 +1386,7 @@ int iommu_page_response(struct device *dev,
 {
 	bool needs_pasid;
 	int ret = -EINVAL;
-	struct iommu_fault_event *evt;
+	struct iopf_fault *evt;
 	struct iommu_fault_page_request *prm;
 	struct dev_iommu *param = dev->iommu;
 	const struct iommu_ops *ops = dev_iommu_ops(dev);