iommu/exynos: use page allocation function provided by iommu-pages.h

Convert iommu/exynos-iommu.c to use the new page allocation functions
provided in iommu-pages.h.

Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20240413002522.1101315-7-pasha.tatashin@soleen.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: soleen

drivers/iommu/exynos-iommu.c

@@ -22,6 +22,8 @@
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 
+#include "iommu-pages.h"
+
 typedef u32 sysmmu_iova_t;
 typedef u32 sysmmu_pte_t;
 static struct iommu_domain exynos_identity_domain;
@@ -900,11 +902,11 @@ static struct iommu_domain *exynos_iommu_domain_alloc_paging(struct device *dev)
 	if (!domain)
 		return NULL;
 
-	domain->pgtable = (sysmmu_pte_t *)__get_free_pages(GFP_KERNEL, 2);
+	domain->pgtable = iommu_alloc_pages(GFP_KERNEL, 2);
 	if (!domain->pgtable)
 		goto err_pgtable;
 
-	domain->lv2entcnt = (short *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
+	domain->lv2entcnt = iommu_alloc_pages(GFP_KERNEL, 1);
 	if (!domain->lv2entcnt)
 		goto err_counter;
 
@@ -930,9 +932,9 @@ static struct iommu_domain *exynos_iommu_domain_alloc_paging(struct device *dev)
 	return &domain->domain;
 
 err_lv2ent:
-	free_pages((unsigned long)domain->lv2entcnt, 1);
+	iommu_free_pages(domain->lv2entcnt, 1);
 err_counter:
-	free_pages((unsigned long)domain->pgtable, 2);
+	iommu_free_pages(domain->pgtable, 2);
 err_pgtable:
 	kfree(domain);
 	return NULL;
@@ -973,8 +975,8 @@ static void exynos_iommu_domain_free(struct iommu_domain *iommu_domain)
 					phys_to_virt(base));
 		}
 
-	free_pages((unsigned long)domain->pgtable, 2);
-	free_pages((unsigned long)domain->lv2entcnt, 1);
+	iommu_free_pages(domain->pgtable, 2);
+	iommu_free_pages(domain->lv2entcnt, 1);
 	kfree(domain);
 }