iommu/io-pgtable-arm: use page allocation function provided by iommu-pages.h

Convert iommu/io-pgtable-arm.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>
Tested-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20240413002522.1101315-5-pasha.tatashin@soleen.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: soleen

drivers/iommu/io-pgtable-arm.c

@@ -21,6 +21,7 @@
 #include <asm/barrier.h>
 
 #include "io-pgtable-arm.h"
+#include "iommu-pages.h"
 
 #define ARM_LPAE_MAX_ADDR_BITS		52
 #define ARM_LPAE_S2_MAX_CONCAT_PAGES	16
@@ -198,14 +199,10 @@ static void *__arm_lpae_alloc_pages(size_t size, gfp_t gfp,
 
 	VM_BUG_ON((gfp & __GFP_HIGHMEM));
 
-	if (cfg->alloc) {
+	if (cfg->alloc)
 		pages = cfg->alloc(cookie, size, gfp);
-	} else {
-		struct page *p;
-
-		p = alloc_pages_node(dev_to_node(dev), gfp | __GFP_ZERO, order);
-		pages = p ? page_address(p) : NULL;
-	}
+	else
+		pages = iommu_alloc_pages_node(dev_to_node(dev), gfp, order);
 
 	if (!pages)
 		return NULL;
@@ -233,7 +230,7 @@ static void *__arm_lpae_alloc_pages(size_t size, gfp_t gfp,
 	if (cfg->free)
 		cfg->free(cookie, pages, size);
 	else
-		free_pages((unsigned long)pages, order);
+		iommu_free_pages(pages, order);
 
 	return NULL;
 }
@@ -249,7 +246,7 @@ static void __arm_lpae_free_pages(void *pages, size_t size,
 	if (cfg->free)
 		cfg->free(cookie, pages, size);
 	else
-		free_pages((unsigned long)pages, get_order(size));
+		iommu_free_pages(pages, get_order(size));
 }
 
 static void __arm_lpae_sync_pte(arm_lpae_iopte *ptep, int num_entries,