[PATCH v3 2/7] iommufd: Pass pasid through the device attach/replace path

[Yi Liu <yi.l.liu@xxxxxxxxx>]

Most of the core logic before conducting the actual device attach/
replace operation can be shared with pasid attach/replace. So pass
pasid through the device attach/replace helpers to prepare adding
pasid attach/replace.

Signed-off-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx>
---
 drivers/iommu/iommufd/device.c | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c
index 873630c111c1..8f13aa94d3af 100644
--- a/drivers/iommu/iommufd/device.c
+++ b/drivers/iommu/iommufd/device.c
@@ -415,7 +415,7 @@ iommufd_hw_pagetable_detach(struct iommufd_device *idev)
 }
 
 static struct iommufd_hw_pagetable *
-iommufd_device_do_attach(struct iommufd_device *idev,
+iommufd_device_do_attach(struct iommufd_device *idev, u32 pasid,
 			 struct iommufd_hw_pagetable *hwpt)
 {
 	int rc;
@@ -469,7 +469,7 @@ iommufd_group_do_replace_paging(struct iommufd_group *igroup,
 }
 
 static struct iommufd_hw_pagetable *
-iommufd_device_do_replace(struct iommufd_device *idev,
+iommufd_device_do_replace(struct iommufd_device *idev, u32 pasid,
 			  struct iommufd_hw_pagetable *hwpt)
 {
 	struct iommufd_group *igroup = idev->igroup;
@@ -532,7 +532,8 @@ iommufd_device_do_replace(struct iommufd_device *idev,
 }
 
 typedef struct iommufd_hw_pagetable *(*attach_fn)(
-	struct iommufd_device *idev, struct iommufd_hw_pagetable *hwpt);
+			struct iommufd_device *idev, u32 pasid,
+			struct iommufd_hw_pagetable *hwpt);
 
 /*
  * When automatically managing the domains we search for a compatible domain in
@@ -540,7 +541,7 @@ typedef struct iommufd_hw_pagetable *(*attach_fn)(
  * Automatic domain selection will never pick a manually created domain.
  */
 static struct iommufd_hw_pagetable *
-iommufd_device_auto_get_domain(struct iommufd_device *idev,
+iommufd_device_auto_get_domain(struct iommufd_device *idev, u32 pasid,
 			       struct iommufd_ioas *ioas, u32 *pt_id,
 			       attach_fn do_attach)
 {
@@ -569,7 +570,7 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev,
 		hwpt = &hwpt_paging->common;
 		if (!iommufd_lock_obj(&hwpt->obj))
 			continue;
-		destroy_hwpt = (*do_attach)(idev, hwpt);
+		destroy_hwpt = (*do_attach)(idev, pasid, hwpt);
 		if (IS_ERR(destroy_hwpt)) {
 			iommufd_put_object(idev->ictx, &hwpt->obj);
 			/*
@@ -596,7 +597,7 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev,
 	hwpt = &hwpt_paging->common;
 
 	if (!immediate_attach) {
-		destroy_hwpt = (*do_attach)(idev, hwpt);
+		destroy_hwpt = (*do_attach)(idev, pasid, hwpt);
 		if (IS_ERR(destroy_hwpt))
 			goto out_abort;
 	} else {
@@ -617,8 +618,8 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev,
 	return destroy_hwpt;
 }
 
-static int iommufd_device_change_pt(struct iommufd_device *idev, u32 *pt_id,
-				    attach_fn do_attach)
+static int iommufd_device_change_pt(struct iommufd_device *idev, u32 pasid,
+				    u32 *pt_id, attach_fn do_attach)
 {
 	struct iommufd_hw_pagetable *destroy_hwpt;
 	struct iommufd_object *pt_obj;
@@ -633,7 +634,7 @@ static int iommufd_device_change_pt(struct iommufd_device *idev, u32 *pt_id,
 		struct iommufd_hw_pagetable *hwpt =
 			container_of(pt_obj, struct iommufd_hw_pagetable, obj);
 
-		destroy_hwpt = (*do_attach)(idev, hwpt);
+		destroy_hwpt = (*do_attach)(idev, pasid, hwpt);
 		if (IS_ERR(destroy_hwpt))
 			goto out_put_pt_obj;
 		break;
@@ -642,8 +643,8 @@ static int iommufd_device_change_pt(struct iommufd_device *idev, u32 *pt_id,
 		struct iommufd_ioas *ioas =
 			container_of(pt_obj, struct iommufd_ioas, obj);
 
-		destroy_hwpt = iommufd_device_auto_get_domain(idev, ioas, pt_id,
-							      do_attach);
+		destroy_hwpt = iommufd_device_auto_get_domain(idev, pasid, ioas,
+							      pt_id, do_attach);
 		if (IS_ERR(destroy_hwpt))
 			goto out_put_pt_obj;
 		break;
@@ -680,7 +681,8 @@ int iommufd_device_attach(struct iommufd_device *idev, u32 *pt_id)
 {
 	int rc;
 
-	rc = iommufd_device_change_pt(idev, pt_id, &iommufd_device_do_attach);
+	rc = iommufd_device_change_pt(idev, IOMMU_PASID_INVALID, pt_id,
+				      &iommufd_device_do_attach);
 	if (rc)
 		return rc;
 
@@ -710,7 +712,7 @@ EXPORT_SYMBOL_NS_GPL(iommufd_device_attach, IOMMUFD);
  */
 int iommufd_device_replace(struct iommufd_device *idev, u32 *pt_id)
 {
-	return iommufd_device_change_pt(idev, pt_id,
+	return iommufd_device_change_pt(idev, IOMMU_PASID_INVALID, pt_id,
 					&iommufd_device_do_replace);
 }
 EXPORT_SYMBOL_NS_GPL(iommufd_device_replace, IOMMUFD);
-- 
2.34.1