[PATCH 09/19] iommu/riscv: Convert to use struct iommu_pages_list

[Jason Gunthorpe]

Change the internal freelist to use struct iommu_pages_list.

riscv uses this page list to free page table levels that are replaced
with leaf ptes.

Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>
---
 drivers/iommu/riscv/iommu.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c
index 6e7df7273426da..549bd8d0615d75 100644
--- a/drivers/iommu/riscv/iommu.c
+++ b/drivers/iommu/riscv/iommu.c
@@ -1085,7 +1085,8 @@ static void riscv_iommu_iotlb_sync(struct iommu_domain *iommu_domain,
 #define _io_pte_entry(pn, prot)	((_PAGE_PFN_MASK & ((pn) << _PAGE_PFN_SHIFT)) | (prot))
 
 static void riscv_iommu_pte_free(struct riscv_iommu_domain *domain,
-				 unsigned long pte, struct list_head *freelist)
+				 unsigned long pte,
+				 struct iommu_pages_list *freelist)
 {
 	unsigned long *ptr;
 	int i;
@@ -1103,7 +1104,7 @@ static void riscv_iommu_pte_free(struct riscv_iommu_domain *domain,
 	}
 
 	if (freelist)
-		list_add_tail(&virt_to_page(ptr)->lru, freelist);
+		iommu_pages_list_add(freelist, ptr);
 	else
 		iommu_free_page(ptr);
 }
@@ -1192,7 +1193,7 @@ static int riscv_iommu_map_pages(struct iommu_domain *iommu_domain,
 	unsigned long *ptr;
 	unsigned long pte, old, pte_prot;
 	int rc = 0;
-	LIST_HEAD(freelist);
+	struct iommu_pages_list freelist = IOMMU_PAGES_LIST_INIT(freelist);
 
 	if (!(prot & IOMMU_WRITE))
 		pte_prot = _PAGE_BASE | _PAGE_READ;
@@ -1223,7 +1224,7 @@ static int riscv_iommu_map_pages(struct iommu_domain *iommu_domain,
 
 	*mapped = size;
 
-	if (!list_empty(&freelist)) {
+	if (!iommu_pages_list_empty(&freelist)) {
 		/*
 		 * In 1.0 spec version, the smallest scope we can use to
 		 * invalidate all levels of page table (i.e. leaf and non-leaf)
-- 
2.43.0