Differential D36869 Diff 111373 sys/compat/linuxkpi/common/include/linux/dma-buf-map.h

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sys/compat/linuxkpi/common/include/linux/dma-buf-map.h

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				/* Public domain. */

				#ifndef _LINUX_DMA_BUF_MAP_H
				#define _LINUX_DMA_BUF_MAP_H

				#include <linux/io.h>
				#include <linux/string.h>

				struct dma_buf_map {
				union {
				void *vaddr_iomem;
				void *vaddr;
				};
				bool is_iomem;
				};

				static inline void
				dma_buf_map_incr(struct dma_buf_map *dbm, size_t n)
				{
				if (dbm->is_iomem)
				dbm->vaddr_iomem += n;
				else
				dbm->vaddr += n;
				}

				static inline void
				dma_buf_map_memcpy_to(struct dma_buf_map dbm, const void src, size_t len)
				{
				if (dbm->is_iomem)
				memcpy_toio(dbm->vaddr_iomem, src, len);
				else
				memcpy(dbm->vaddr, src, len);
				}

				static inline bool
				dma_buf_map_is_null(const struct dma_buf_map *dbm)
				{
				if (dbm->is_iomem)
				return (dbm->vaddr_iomem == NULL);
				else
				return (dbm->vaddr == NULL);
				}

				static inline bool
				dma_buf_map_is_set(const struct dma_buf_map *dbm)
				{
				if (dbm->is_iomem)
				return (dbm->vaddr_iomem != NULL);
				else
				return (dbm->vaddr != NULL);
				}

				static inline bool
				dma_buf_map_is_equal(
				const struct dma_buf_map dbm_a, const struct dma_buf_map dbm_b)
				{
				if (dbm_a->is_iomem != dbm_b->is_iomem)
				return (false);

				if (dbm_a->is_iomem)
				return (dbm_a->vaddr_iomem == dbm_b->vaddr_iomem);
				else
				return (dbm_a->vaddr == dbm_b->vaddr);
				}

				static inline void
				dma_buf_map_clear(struct dma_buf_map *dbm)
				{
				if (dbm->is_iomem) {
				dbm->vaddr_iomem = NULL;
				dbm->is_iomem = false;
				} else {
				dbm->vaddr = NULL;
				}
				}

				static inline void
				dma_buf_map_set_vaddr_iomem(struct dma_buf_map dbm, void addr)
				{
				dbm->vaddr_iomem = addr;
				dbm->is_iomem = true;
				}

				static inline void
				dma_buf_map_set_vaddr(struct dma_buf_map dbm, void addr)
				{
				dbm->vaddr = addr;
				dbm->is_iomem = false;
				}

				#endif