Add samsung specific changes

include/linux/dma-mapping-fast.h

@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2016-2019, 2021, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef __LINUX_DMA_MAPPING_FAST_H
+#define __LINUX_DMA_MAPPING_FAST_H
+
+#include <linux/iommu.h>
+#include <linux/io-pgtable-fast.h>
+#include <linux/rbtree.h>
+#include <linux/mutex.h>
+
+struct dma_iommu_mapping;
+struct io_pgtable_ops;
+struct iova_domain;
+
+struct dma_fast_smmu_mapping {
+	struct device		*dev;
+	struct iommu_domain	*domain;
+	struct iova_domain	*iovad;
+
+	dma_addr_t	 base;
+	size_t		 size;
+	size_t		 num_4k_pages;
+
+	unsigned int	bitmap_size;
+	/* bitmap has 1s marked only valid mappings */
+	unsigned long	*bitmap;
+	/* clean_bitmap has 1s marked for both valid and stale tlb mappings */
+	unsigned long	*clean_bitmap;
+	unsigned long	next_start;
+	bool		have_stale_tlbs;
+
+	dma_addr_t	pgtbl_dma_handle;
+	struct io_pgtable_ops *pgtbl_ops;
+
+	spinlock_t	lock;
+	struct notifier_block notifier;
+	struct rb_node node;
+	struct mutex msi_cookie_init_lock;
+};
+
+#ifdef CONFIG_IOMMU_IO_PGTABLE_FAST
+int fast_smmu_init_mapping(struct device *dev, struct iommu_domain *domain,
+			   struct io_pgtable_ops *pgtable_ops);
+void fast_smmu_put_dma_cookie(struct iommu_domain *domain);
+void fast_smmu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size);
+int __init dma_mapping_fast_init(void);
+#else
+static inline int fast_smmu_init_mapping(struct device *dev,
+					 struct iommu_domain *domain,
+					 struct io_pgtable_ops *pgtable_ops)
+{
+	return -ENODEV;
+}
+
+static inline void fast_smmu_put_dma_cookie(struct iommu_domain *domain) {}
+static inline void fast_smmu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size) {}
+
+static inline int __init dma_mapping_fast_init(void)
+{
+	return 0;
+}
+
+#endif
+
+#endif /* __LINUX_DMA_MAPPING_FAST_H */