linux-kernel - [PATCH 09/13] iommu: amd: Rename variables to be consistent with struct io_pgtable

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Date:   Wed, 23 Sep 2020 10:14:38 +0000
From:   Suravee Suthikulpanit <suravee.suthikulpanit@....com>
To:     linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org
Cc:     joro@...tes.org,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Subject: [PATCH 09/13] iommu: amd: Rename variables to be consistent with struct io_pgtable_ops

There is no functional change.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
---
 drivers/iommu/amd/io_pgtable.c | 31 +++++++++++++++----------------
 1 file changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/iommu/amd/io_pgtable.c b/drivers/iommu/amd/io_pgtable.c
index 524c5406ccd6..5da5ce98b7b3 100644
--- a/drivers/iommu/amd/io_pgtable.c
+++ b/drivers/iommu/amd/io_pgtable.c
@@ -424,9 +424,9 @@ static struct page *free_clear_pte(u64 *pte, u64 pteval, struct page *freelist)
  * and full 64 bit address spaces.
  */
 int iommu_map_page(struct protection_domain *dom,
-		   unsigned long bus_addr,
-		   unsigned long phys_addr,
-		   unsigned long page_size,
+		   unsigned long iova,
+		   unsigned long paddr,
+		   unsigned long size,
 		   int prot,
 		   gfp_t gfp)
 {
@@ -435,15 +435,15 @@ int iommu_map_page(struct protection_domain *dom,
 	u64 __pte, *pte;
 	int ret, i, count;
 
-	BUG_ON(!IS_ALIGNED(bus_addr, page_size));
-	BUG_ON(!IS_ALIGNED(phys_addr, page_size));
+	BUG_ON(!IS_ALIGNED(iova, size));
+	BUG_ON(!IS_ALIGNED(paddr, size));
 
 	ret = -EINVAL;
 	if (!(prot & IOMMU_PROT_MASK))
 		goto out;
 
-	count = PAGE_SIZE_PTE_COUNT(page_size);
-	pte   = alloc_pte(dom, bus_addr, page_size, NULL, gfp, &updated);
+	count = PAGE_SIZE_PTE_COUNT(size);
+	pte   = alloc_pte(dom, iova, size, NULL, gfp, &updated);
 
 	ret = -ENOMEM;
 	if (!pte)
@@ -456,10 +456,10 @@ int iommu_map_page(struct protection_domain *dom,
 		updated = true;
 
 	if (count > 1) {
-		__pte = PAGE_SIZE_PTE(__sme_set(phys_addr), page_size);
+		__pte = PAGE_SIZE_PTE(__sme_set(paddr), size);
 		__pte |= PM_LEVEL_ENC(7) | IOMMU_PTE_PR | IOMMU_PTE_FC;
 	} else
-		__pte = __sme_set(phys_addr) | IOMMU_PTE_PR | IOMMU_PTE_FC;
+		__pte = __sme_set(paddr) | IOMMU_PTE_PR | IOMMU_PTE_FC;
 
 	if (prot & IOMMU_PROT_IR)
 		__pte |= IOMMU_PTE_IR;
@@ -493,20 +493,19 @@ int iommu_map_page(struct protection_domain *dom,
 }
 
 unsigned long iommu_unmap_page(struct protection_domain *dom,
-			       unsigned long bus_addr,
-			       unsigned long page_size)
+			       unsigned long iova,
+			       unsigned long size)
 {
 	unsigned long long unmapped;
 	unsigned long unmap_size;
 	u64 *pte;
 
-	BUG_ON(!is_power_of_2(page_size));
+	BUG_ON(!is_power_of_2(size));
 
 	unmapped = 0;
 
-	while (unmapped < page_size) {
-
-		pte = fetch_pte(dom, bus_addr, &unmap_size);
+	while (unmapped < size) {
+		pte = fetch_pte(dom, iova, &unmap_size);
 
 		if (pte) {
 			int i, count;
@@ -516,7 +515,7 @@ unsigned long iommu_unmap_page(struct protection_domain *dom,
 				pte[i] = 0ULL;
 		}
 
-		bus_addr  = (bus_addr & ~(unmap_size - 1)) + unmap_size;
+		iova = (iova & ~(unmap_size - 1)) + unmap_size;
 		unmapped += unmap_size;
 	}
 
-- 
2.17.1