Re: [PATCH v2] dma-buf-map: Rename to iosys-map

[Thomas Zimmermann]

Hi

Am 02.02.22 um 10:11 schrieb Lucas De Marchi:
> diff --git a/Documentation/driver-api/dma-buf.rst b/Documentation/driver-api/dma-buf.rst
> index 2cd7db82d9fe..ea1e81894d7c 100644
> --- a/Documentation/driver-api/dma-buf.rst
> +++ b/Documentation/driver-api/dma-buf.rst
> @@ -131,10 +131,10 @@ Kernel Functions and Structures Reference
>   Buffer Mapping Helpers
>   ~~~~~~~~~~~~~~~~~~~~~~
>   
> -.. kernel-doc:: include/linux/dma-buf-map.h
> +.. kernel-doc:: include/linux/iosys-map.h
>      :doc: overview
>   
> -.. kernel-doc:: include/linux/dma-buf-map.h
> +.. kernel-doc:: include/linux/iosys-map.h
>      :internal:

Should we move this section to a better place than dma-buf.rst? There's 
'Bus-Independent Device Accesses' in 
Documentation/driver-api/device-io.rst. It describes all the I/O helpers 
and looks like a good fit.

>   
>   Reservation Objects
> diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst
> index 1b2372ef4131..ee842606e883 100644
> --- a/Documentation/gpu/todo.rst
> +++ b/Documentation/gpu/todo.rst
> @@ -222,7 +222,7 @@ Convert drivers to use drm_fbdev_generic_setup()
>   Most drivers can use drm_fbdev_generic_setup(). Driver have to implement
>   atomic modesetting and GEM vmap support. Historically, generic fbdev emulation
>   expected the framebuffer in system memory or system-like memory. By employing
> -struct dma_buf_map, drivers with frambuffers in I/O memory can be supported
> +struct iosys_map, drivers with frambuffers in I/O memory can be supported
>   as well.
>   
>   Contact: Maintainer of the driver you plan to convert
> @@ -234,7 +234,7 @@ Reimplement functions in drm_fbdev_fb_ops without fbdev
>   
>   A number of callback functions in drm_fbdev_fb_ops could benefit from
>   being rewritten without dependencies on the fbdev module. Some of the
> -helpers could further benefit from using struct dma_buf_map instead of
> +helpers could further benefit from using struct iosys_map instead of
>   raw pointers.
>   
>   Contact: Thomas Zimmermann <tzimmermann@xxxxxxx>, Daniel Vetter
> @@ -434,19 +434,19 @@ Contact: Emil Velikov, respective driver maintainers
>   
>   Level: Intermediate
>   
> -Use struct dma_buf_map throughout codebase
> -------------------------------------------
> +Use struct iosys_map throughout codebase
> +----------------------------------------
>   
> -Pointers to shared device memory are stored in struct dma_buf_map. Each
> +Pointers to shared device memory are stored in struct iosys_map. Each
>   instance knows whether it refers to system or I/O memory. Most of the DRM-wide
> -interface have been converted to use struct dma_buf_map, but implementations
> +interface have been converted to use struct iosys_map, but implementations
>   often still use raw pointers.
>   
> -The task is to use struct dma_buf_map where it makes sense.
> +The task is to use struct iosys_map where it makes sense.
>   
> -* Memory managers should use struct dma_buf_map for dma-buf-imported buffers.
> -* TTM might benefit from using struct dma_buf_map internally.
> -* Framebuffer copying and blitting helpers should operate on struct dma_buf_map.
> +* Memory managers should use struct iosys_map for dma-buf-imported buffers.
> +* TTM might benefit from using struct iosys_map internally.
> +* Framebuffer copying and blitting helpers should operate on struct iosys_map.
>   
>   Contact: Thomas Zimmermann <tzimmermann@xxxxxxx>, Christian König, Daniel Vetter
>   
> diff --git a/MAINTAINERS b/MAINTAINERS
> index d03ad8da1f36..112676f11792 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -5675,7 +5675,6 @@ T:	git git://anongit.freedesktop.org/drm/drm-misc
>   F:	Documentation/driver-api/dma-buf.rst
>   F:	drivers/dma-buf/
>   F:	include/linux/*fence.h
> -F:	include/linux/dma-buf*

There's still include/linux/dma-buf.h that needs to be listed.

>   F:	include/linux/dma-resv.h
>   K:	\bdma_(?:buf|fence|resv)\b
>   
> @@ -9976,6 +9975,13 @@ F:	include/linux/iova.h
>   F:	include/linux/of_iommu.h
>   F:	include/uapi/linux/iommu.h
>   
> +IOSYS-MAP HELPERS
> +M:	Thomas Zimmermann <tzimmermann@xxxxxxx>
> +L:	dri-devel@xxxxxxxxxxxxxxxxxxxxx
> +S:	Maintained
> +T:	git git://anongit.freedesktop.org/drm/drm-misc
> +F:	include/linux/iosys-map.h

Makes sense.

I briefly looked through the rst of the code conversion. Looks good to 
me. Thanks for squashing the patches into one.

Best regards
Thomas

> +
>   IO_URING
>   M:	Jens Axboe <axboe@xxxxxxxxx>
>   R:	Pavel Begunkov <asml.silence@xxxxxxxxx>
> diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
> index 602b12d7470d..df23239b04fc 100644
> --- a/drivers/dma-buf/dma-buf.c
> +++ b/drivers/dma-buf/dma-buf.c
> @@ -1047,8 +1047,8 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_move_notify, DMA_BUF);
>    *
>    *   Interfaces::
>    *
> - *      void \*dma_buf_vmap(struct dma_buf \*dmabuf, struct dma_buf_map \*map)
> - *      void dma_buf_vunmap(struct dma_buf \*dmabuf, struct dma_buf_map \*map)
> + *      void \*dma_buf_vmap(struct dma_buf \*dmabuf, struct iosys_map \*map)
> + *      void dma_buf_vunmap(struct dma_buf \*dmabuf, struct iosys_map \*map)
>    *
>    *   The vmap call can fail if there is no vmap support in the exporter, or if
>    *   it runs out of vmalloc space. Note that the dma-buf layer keeps a reference
> @@ -1260,12 +1260,12 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_mmap, DMA_BUF);
>    *
>    * Returns 0 on success, or a negative errno code otherwise.
>    */
> -int dma_buf_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
> +int dma_buf_vmap(struct dma_buf *dmabuf, struct iosys_map *map)
>   {
> -	struct dma_buf_map ptr;
> +	struct iosys_map ptr;
>   	int ret = 0;
>   
> -	dma_buf_map_clear(map);
> +	iosys_map_clear(map);
>   
>   	if (WARN_ON(!dmabuf))
>   		return -EINVAL;
> @@ -1276,12 +1276,12 @@ int dma_buf_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
>   	mutex_lock(&dmabuf->lock);
>   	if (dmabuf->vmapping_counter) {
>   		dmabuf->vmapping_counter++;
> -		BUG_ON(dma_buf_map_is_null(&dmabuf->vmap_ptr));
> +		BUG_ON(iosys_map_is_null(&dmabuf->vmap_ptr));
>   		*map = dmabuf->vmap_ptr;
>   		goto out_unlock;
>   	}
>   
> -	BUG_ON(dma_buf_map_is_set(&dmabuf->vmap_ptr));
> +	BUG_ON(iosys_map_is_set(&dmabuf->vmap_ptr));
>   
>   	ret = dmabuf->ops->vmap(dmabuf, &ptr);
>   	if (WARN_ON_ONCE(ret))
> @@ -1303,20 +1303,20 @@ EXPORT_SYMBOL_NS_GPL(dma_buf_vmap, DMA_BUF);
>    * @dmabuf:	[in]	buffer to vunmap
>    * @map:	[in]	vmap pointer to vunmap
>    */
> -void dma_buf_vunmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
> +void dma_buf_vunmap(struct dma_buf *dmabuf, struct iosys_map *map)
>   {
>   	if (WARN_ON(!dmabuf))
>   		return;
>   
> -	BUG_ON(dma_buf_map_is_null(&dmabuf->vmap_ptr));
> +	BUG_ON(iosys_map_is_null(&dmabuf->vmap_ptr));
>   	BUG_ON(dmabuf->vmapping_counter == 0);
> -	BUG_ON(!dma_buf_map_is_equal(&dmabuf->vmap_ptr, map));
> +	BUG_ON(!iosys_map_is_equal(&dmabuf->vmap_ptr, map));
>   
>   	mutex_lock(&dmabuf->lock);
>   	if (--dmabuf->vmapping_counter == 0) {
>   		if (dmabuf->ops->vunmap)
>   			dmabuf->ops->vunmap(dmabuf, map);
> -		dma_buf_map_clear(&dmabuf->vmap_ptr);
> +		iosys_map_clear(&dmabuf->vmap_ptr);
>   	}
>   	mutex_unlock(&dmabuf->lock);
>   }
> diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c
> index 0c05b79870f9..07ace3ccb266 100644
> --- a/drivers/dma-buf/heaps/cma_heap.c
> +++ b/drivers/dma-buf/heaps/cma_heap.c
> @@ -200,7 +200,7 @@ static void *cma_heap_do_vmap(struct cma_heap_buffer *buffer)
>   	return vaddr;
>   }
>   
> -static int cma_heap_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
> +static int cma_heap_vmap(struct dma_buf *dmabuf, struct iosys_map *map)
>   {
>   	struct cma_heap_buffer *buffer = dmabuf->priv;
>   	void *vaddr;
> @@ -209,7 +209,7 @@ static int cma_heap_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
>   	mutex_lock(&buffer->lock);
>   	if (buffer->vmap_cnt) {
>   		buffer->vmap_cnt++;
> -		dma_buf_map_set_vaddr(map, buffer->vaddr);
> +		iosys_map_set_vaddr(map, buffer->vaddr);
>   		goto out;
>   	}
>   
> @@ -220,14 +220,14 @@ static int cma_heap_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
>   	}
>   	buffer->vaddr = vaddr;
>   	buffer->vmap_cnt++;
> -	dma_buf_map_set_vaddr(map, buffer->vaddr);
> +	iosys_map_set_vaddr(map, buffer->vaddr);
>   out:
>   	mutex_unlock(&buffer->lock);
>   
>   	return ret;
>   }
>   
> -static void cma_heap_vunmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
> +static void cma_heap_vunmap(struct dma_buf *dmabuf, struct iosys_map *map)
>   {
>   	struct cma_heap_buffer *buffer = dmabuf->priv;
>   
> @@ -237,7 +237,7 @@ static void cma_heap_vunmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
>   		buffer->vaddr = NULL;
>   	}
>   	mutex_unlock(&buffer->lock);
> -	dma_buf_map_clear(map);
> +	iosys_map_clear(map);
>   }
>   
>   static void cma_heap_dma_buf_release(struct dma_buf *dmabuf)
> diff --git a/drivers/dma-buf/heaps/system_heap.c b/drivers/dma-buf/heaps/system_heap.c
> index ab7fd896d2c4..fcf836ba9c1f 100644
> --- a/drivers/dma-buf/heaps/system_heap.c
> +++ b/drivers/dma-buf/heaps/system_heap.c
> @@ -241,7 +241,7 @@ static void *system_heap_do_vmap(struct system_heap_buffer *buffer)
>   	return vaddr;
>   }
>   
> -static int system_heap_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
> +static int system_heap_vmap(struct dma_buf *dmabuf, struct iosys_map *map)
>   {
>   	struct system_heap_buffer *buffer = dmabuf->priv;
>   	void *vaddr;
> @@ -250,7 +250,7 @@ static int system_heap_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
>   	mutex_lock(&buffer->lock);
>   	if (buffer->vmap_cnt) {
>   		buffer->vmap_cnt++;
> -		dma_buf_map_set_vaddr(map, buffer->vaddr);
> +		iosys_map_set_vaddr(map, buffer->vaddr);
>   		goto out;
>   	}
>   
> @@ -262,14 +262,14 @@ static int system_heap_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
>   
>   	buffer->vaddr = vaddr;
>   	buffer->vmap_cnt++;
> -	dma_buf_map_set_vaddr(map, buffer->vaddr);
> +	iosys_map_set_vaddr(map, buffer->vaddr);
>   out:
>   	mutex_unlock(&buffer->lock);
>   
>   	return ret;
>   }
>   
> -static void system_heap_vunmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
> +static void system_heap_vunmap(struct dma_buf *dmabuf, struct iosys_map *map)
>   {
>   	struct system_heap_buffer *buffer = dmabuf->priv;
>   
> @@ -279,7 +279,7 @@ static void system_heap_vunmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
>   		buffer->vaddr = NULL;
>   	}
>   	mutex_unlock(&buffer->lock);
> -	dma_buf_map_clear(map);
> +	iosys_map_clear(map);
>   }
>   
>   static void system_heap_dma_buf_release(struct dma_buf *dmabuf)
> diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
> index 00bfa41ff7cb..9c8d56b0a41b 100644
> --- a/drivers/gpu/drm/ast/ast_drv.h
> +++ b/drivers/gpu/drm/ast/ast_drv.h
> @@ -107,7 +107,7 @@ struct ast_cursor_plane {
>   
>   	struct {
>   		struct drm_gem_vram_object *gbo;
> -		struct dma_buf_map map;
> +		struct iosys_map map;
>   		u64 off;
>   	} hwc[AST_DEFAULT_HWC_NUM];
>   
> diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
> index 6fa8042a0dfd..2759e977d95d 100644
> --- a/drivers/gpu/drm/ast/ast_mode.c
> +++ b/drivers/gpu/drm/ast/ast_mode.c
> @@ -804,11 +804,11 @@ ast_cursor_plane_helper_atomic_update(struct drm_plane *plane,
>   	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(new_state);
>   	struct drm_framebuffer *fb = new_state->fb;
>   	struct ast_private *ast = to_ast_private(plane->dev);
> -	struct dma_buf_map dst_map =
> +	struct iosys_map dst_map =
>   		ast_cursor_plane->hwc[ast_cursor_plane->next_hwc_index].map;
>   	u64 dst_off =
>   		ast_cursor_plane->hwc[ast_cursor_plane->next_hwc_index].off;
> -	struct dma_buf_map src_map = shadow_plane_state->data[0];
> +	struct iosys_map src_map = shadow_plane_state->data[0];
>   	unsigned int offset_x, offset_y;
>   	u16 x, y;
>   	u8 x_offset, y_offset;
> @@ -886,7 +886,7 @@ static void ast_cursor_plane_destroy(struct drm_plane *plane)
>   	struct ast_cursor_plane *ast_cursor_plane = to_ast_cursor_plane(plane);
>   	size_t i;
>   	struct drm_gem_vram_object *gbo;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   
>   	for (i = 0; i < ARRAY_SIZE(ast_cursor_plane->hwc); ++i) {
>   		gbo = ast_cursor_plane->hwc[i].gbo;
> @@ -913,7 +913,7 @@ static int ast_cursor_plane_init(struct ast_private *ast)
>   	struct drm_plane *cursor_plane = &ast_cursor_plane->base;
>   	size_t size, i;
>   	struct drm_gem_vram_object *gbo;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	int ret;
>   	s64 off;
>   
> diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c
> index f19d9acbe959..4bb093ccf1b8 100644
> --- a/drivers/gpu/drm/drm_cache.c
> +++ b/drivers/gpu/drm/drm_cache.c
> @@ -28,10 +28,10 @@
>    * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
>    */
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/cc_platform.h>
>   #include <linux/export.h>
>   #include <linux/highmem.h>
> -#include <linux/cc_platform.h>
> +#include <linux/iosys-map.h>
>   #include <xen/xen.h>
>   
>   #include <drm/drm_cache.h>
> @@ -214,14 +214,14 @@ bool drm_need_swiotlb(int dma_bits)
>   }
>   EXPORT_SYMBOL(drm_need_swiotlb);
>   
> -static void memcpy_fallback(struct dma_buf_map *dst,
> -			    const struct dma_buf_map *src,
> +static void memcpy_fallback(struct iosys_map *dst,
> +			    const struct iosys_map *src,
>   			    unsigned long len)
>   {
>   	if (!dst->is_iomem && !src->is_iomem) {
>   		memcpy(dst->vaddr, src->vaddr, len);
>   	} else if (!src->is_iomem) {
> -		dma_buf_map_memcpy_to(dst, src->vaddr, len);
> +		iosys_map_memcpy_to(dst, src->vaddr, len);
>   	} else if (!dst->is_iomem) {
>   		memcpy_fromio(dst->vaddr, src->vaddr_iomem, len);
>   	} else {
> @@ -305,8 +305,8 @@ static void __drm_memcpy_from_wc(void *dst, const void *src, unsigned long len)
>    * Tries an arch optimized memcpy for prefetching reading out of a WC region,
>    * and if no such beast is available, falls back to a normal memcpy.
>    */
> -void drm_memcpy_from_wc(struct dma_buf_map *dst,
> -			const struct dma_buf_map *src,
> +void drm_memcpy_from_wc(struct iosys_map *dst,
> +			const struct iosys_map *src,
>   			unsigned long len)
>   {
>   	if (WARN_ON(in_interrupt())) {
> @@ -343,8 +343,8 @@ void drm_memcpy_init_early(void)
>   		static_branch_enable(&has_movntdqa);
>   }
>   #else
> -void drm_memcpy_from_wc(struct dma_buf_map *dst,
> -			const struct dma_buf_map *src,
> +void drm_memcpy_from_wc(struct iosys_map *dst,
> +			const struct iosys_map *src,
>   			unsigned long len)
>   {
>   	WARN_ON(in_interrupt());
> diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
> index ce45e380f4a2..af3b7395bf69 100644
> --- a/drivers/gpu/drm/drm_client.c
> +++ b/drivers/gpu/drm/drm_client.c
> @@ -3,7 +3,7 @@
>    * Copyright 2018 Noralf Trønnes
>    */
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/list.h>
>   #include <linux/module.h>
>   #include <linux/mutex.h>
> @@ -309,9 +309,10 @@ drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height, u
>    *	0 on success, or a negative errno code otherwise.
>    */
>   int
> -drm_client_buffer_vmap(struct drm_client_buffer *buffer, struct dma_buf_map *map_copy)
> +drm_client_buffer_vmap(struct drm_client_buffer *buffer,
> +		       struct iosys_map *map_copy)
>   {
> -	struct dma_buf_map *map = &buffer->map;
> +	struct iosys_map *map = &buffer->map;
>   	int ret;
>   
>   	/*
> @@ -342,7 +343,7 @@ EXPORT_SYMBOL(drm_client_buffer_vmap);
>    */
>   void drm_client_buffer_vunmap(struct drm_client_buffer *buffer)
>   {
> -	struct dma_buf_map *map = &buffer->map;
> +	struct iosys_map *map = &buffer->map;
>   
>   	drm_gem_vunmap(buffer->gem, map);
>   }
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index 9727a59d35fd..54636892aca7 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -373,7 +373,7 @@ static void drm_fb_helper_resume_worker(struct work_struct *work)
>   
>   static void drm_fb_helper_damage_blit_real(struct drm_fb_helper *fb_helper,
>   					   struct drm_clip_rect *clip,
> -					   struct dma_buf_map *dst)
> +					   struct iosys_map *dst)
>   {
>   	struct drm_framebuffer *fb = fb_helper->fb;
>   	unsigned int cpp = fb->format->cpp[0];
> @@ -382,11 +382,11 @@ static void drm_fb_helper_damage_blit_real(struct drm_fb_helper *fb_helper,
>   	size_t len = (clip->x2 - clip->x1) * cpp;
>   	unsigned int y;
>   
> -	dma_buf_map_incr(dst, offset); /* go to first pixel within clip rect */
> +	iosys_map_incr(dst, offset); /* go to first pixel within clip rect */
>   
>   	for (y = clip->y1; y < clip->y2; y++) {
> -		dma_buf_map_memcpy_to(dst, src, len);
> -		dma_buf_map_incr(dst, fb->pitches[0]);
> +		iosys_map_memcpy_to(dst, src, len);
> +		iosys_map_incr(dst, fb->pitches[0]);
>   		src += fb->pitches[0];
>   	}
>   }
> @@ -395,7 +395,7 @@ static int drm_fb_helper_damage_blit(struct drm_fb_helper *fb_helper,
>   				     struct drm_clip_rect *clip)
>   {
>   	struct drm_client_buffer *buffer = fb_helper->buffer;
> -	struct dma_buf_map map, dst;
> +	struct iosys_map map, dst;
>   	int ret;
>   
>   	/*
> @@ -2316,7 +2316,7 @@ static int drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper,
>   	struct drm_framebuffer *fb;
>   	struct fb_info *fbi;
>   	u32 format;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	int ret;
>   
>   	drm_dbg_kms(dev, "surface width(%d), height(%d) and bpp(%d)\n",
> diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
> index 4dcdec6487bb..8c7b24f4b0e4 100644
> --- a/drivers/gpu/drm/drm_gem.c
> +++ b/drivers/gpu/drm/drm_gem.c
> @@ -36,7 +36,7 @@
>   #include <linux/pagemap.h>
>   #include <linux/shmem_fs.h>
>   #include <linux/dma-buf.h>
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/mem_encrypt.h>
>   #include <linux/pagevec.h>
>   
> @@ -1165,7 +1165,7 @@ void drm_gem_unpin(struct drm_gem_object *obj)
>   		obj->funcs->unpin(obj);
>   }
>   
> -int drm_gem_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map)
>   {
>   	int ret;
>   
> @@ -1175,23 +1175,23 @@ int drm_gem_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
>   	ret = obj->funcs->vmap(obj, map);
>   	if (ret)
>   		return ret;
> -	else if (dma_buf_map_is_null(map))
> +	else if (iosys_map_is_null(map))
>   		return -ENOMEM;
>   
>   	return 0;
>   }
>   EXPORT_SYMBOL(drm_gem_vmap);
>   
> -void drm_gem_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
>   {
> -	if (dma_buf_map_is_null(map))
> +	if (iosys_map_is_null(map))
>   		return;
>   
>   	if (obj->funcs->vunmap)
>   		obj->funcs->vunmap(obj, map);
>   
>   	/* Always set the mapping to NULL. Callers may rely on this. */
> -	dma_buf_map_clear(map);
> +	iosys_map_clear(map);
>   }
>   EXPORT_SYMBOL(drm_gem_vunmap);
>   
> diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c
> index cefd0cbf9deb..88c432a7cb3c 100644
> --- a/drivers/gpu/drm/drm_gem_cma_helper.c
> +++ b/drivers/gpu/drm/drm_gem_cma_helper.c
> @@ -209,7 +209,7 @@ drm_gem_cma_create_with_handle(struct drm_file *file_priv,
>   void drm_gem_cma_free(struct drm_gem_cma_object *cma_obj)
>   {
>   	struct drm_gem_object *gem_obj = &cma_obj->base;
> -	struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(cma_obj->vaddr);
> +	struct iosys_map map = IOSYS_MAP_INIT_VADDR(cma_obj->vaddr);
>   
>   	if (gem_obj->import_attach) {
>   		if (cma_obj->vaddr)
> @@ -480,9 +480,10 @@ EXPORT_SYMBOL_GPL(drm_gem_cma_prime_import_sg_table);
>    * Returns:
>    * 0 on success, or a negative error code otherwise.
>    */
> -int drm_gem_cma_vmap(struct drm_gem_cma_object *cma_obj, struct dma_buf_map *map)
> +int drm_gem_cma_vmap(struct drm_gem_cma_object *cma_obj,
> +		     struct iosys_map *map)
>   {
> -	dma_buf_map_set_vaddr(map, cma_obj->vaddr);
> +	iosys_map_set_vaddr(map, cma_obj->vaddr);
>   
>   	return 0;
>   }
> @@ -557,7 +558,7 @@ drm_gem_cma_prime_import_sg_table_vmap(struct drm_device *dev,
>   {
>   	struct drm_gem_cma_object *cma_obj;
>   	struct drm_gem_object *obj;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	int ret;
>   
>   	ret = dma_buf_vmap(attach->dmabuf, &map);
> diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
> index 746fd8c73845..f4619803acd0 100644
> --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c
> +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
> @@ -321,7 +321,7 @@ EXPORT_SYMBOL_GPL(drm_gem_fb_create_with_dirty);
>    * @data: returns the data address for each BO, can be NULL
>    *
>    * This function maps all buffer objects of the given framebuffer into
> - * kernel address space and stores them in struct dma_buf_map. If the
> + * kernel address space and stores them in struct iosys_map. If the
>    * mapping operation fails for one of the BOs, the function unmaps the
>    * already established mappings automatically.
>    *
> @@ -335,8 +335,8 @@ EXPORT_SYMBOL_GPL(drm_gem_fb_create_with_dirty);
>    * 0 on success, or a negative errno code otherwise.
>    */
>   int drm_gem_fb_vmap(struct drm_framebuffer *fb,
> -		    struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES],
> -		    struct dma_buf_map data[DRM_FORMAT_MAX_PLANES])
> +		    struct iosys_map map[static DRM_FORMAT_MAX_PLANES],
> +		    struct iosys_map data[DRM_FORMAT_MAX_PLANES])
>   {
>   	struct drm_gem_object *obj;
>   	unsigned int i;
> @@ -345,7 +345,7 @@ int drm_gem_fb_vmap(struct drm_framebuffer *fb,
>   	for (i = 0; i < DRM_FORMAT_MAX_PLANES; ++i) {
>   		obj = drm_gem_fb_get_obj(fb, i);
>   		if (!obj) {
> -			dma_buf_map_clear(&map[i]);
> +			iosys_map_clear(&map[i]);
>   			continue;
>   		}
>   		ret = drm_gem_vmap(obj, &map[i]);
> @@ -356,9 +356,9 @@ int drm_gem_fb_vmap(struct drm_framebuffer *fb,
>   	if (data) {
>   		for (i = 0; i < DRM_FORMAT_MAX_PLANES; ++i) {
>   			memcpy(&data[i], &map[i], sizeof(data[i]));
> -			if (dma_buf_map_is_null(&data[i]))
> +			if (iosys_map_is_null(&data[i]))
>   				continue;
> -			dma_buf_map_incr(&data[i], fb->offsets[i]);
> +			iosys_map_incr(&data[i], fb->offsets[i]);
>   		}
>   	}
>   
> @@ -386,7 +386,7 @@ EXPORT_SYMBOL(drm_gem_fb_vmap);
>    * See drm_gem_fb_vmap() for more information.
>    */
>   void drm_gem_fb_vunmap(struct drm_framebuffer *fb,
> -		       struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES])
> +		       struct iosys_map map[static DRM_FORMAT_MAX_PLANES])
>   {
>   	unsigned int i = DRM_FORMAT_MAX_PLANES;
>   	struct drm_gem_object *obj;
> @@ -396,7 +396,7 @@ void drm_gem_fb_vunmap(struct drm_framebuffer *fb,
>   		obj = drm_gem_fb_get_obj(fb, i);
>   		if (!obj)
>   			continue;
> -		if (dma_buf_map_is_null(&map[i]))
> +		if (iosys_map_is_null(&map[i]))
>   			continue;
>   		drm_gem_vunmap(obj, &map[i]);
>   	}
> diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
> index 621924116eb4..3e738aea2664 100644
> --- a/drivers/gpu/drm/drm_gem_shmem_helper.c
> +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
> @@ -286,13 +286,14 @@ void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem)
>   }
>   EXPORT_SYMBOL(drm_gem_shmem_unpin);
>   
> -static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, struct dma_buf_map *map)
> +static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem,
> +				     struct iosys_map *map)
>   {
>   	struct drm_gem_object *obj = &shmem->base;
>   	int ret = 0;
>   
>   	if (shmem->vmap_use_count++ > 0) {
> -		dma_buf_map_set_vaddr(map, shmem->vaddr);
> +		iosys_map_set_vaddr(map, shmem->vaddr);
>   		return 0;
>   	}
>   
> @@ -319,7 +320,7 @@ static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, struct
>   		if (!shmem->vaddr)
>   			ret = -ENOMEM;
>   		else
> -			dma_buf_map_set_vaddr(map, shmem->vaddr);
> +			iosys_map_set_vaddr(map, shmem->vaddr);
>   	}
>   
>   	if (ret) {
> @@ -353,7 +354,8 @@ static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, struct
>    * Returns:
>    * 0 on success or a negative error code on failure.
>    */
> -int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem, struct dma_buf_map *map)
> +int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem,
> +		       struct iosys_map *map)
>   {
>   	int ret;
>   
> @@ -368,7 +370,7 @@ int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem, struct dma_buf_map *m
>   EXPORT_SYMBOL(drm_gem_shmem_vmap);
>   
>   static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem,
> -					struct dma_buf_map *map)
> +					struct iosys_map *map)
>   {
>   	struct drm_gem_object *obj = &shmem->base;
>   
> @@ -400,7 +402,8 @@ static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem,
>    * This function hides the differences between dma-buf imported and natively
>    * allocated objects.
>    */
> -void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem, struct dma_buf_map *map)
> +void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem,
> +			  struct iosys_map *map)
>   {
>   	mutex_lock(&shmem->vmap_lock);
>   	drm_gem_shmem_vunmap_locked(shmem, map);
> diff --git a/drivers/gpu/drm/drm_gem_ttm_helper.c b/drivers/gpu/drm/drm_gem_ttm_helper.c
> index ecf3d2a54a98..d5962a34c01d 100644
> --- a/drivers/gpu/drm/drm_gem_ttm_helper.c
> +++ b/drivers/gpu/drm/drm_gem_ttm_helper.c
> @@ -61,7 +61,7 @@ EXPORT_SYMBOL(drm_gem_ttm_print_info);
>    * 0 on success, or a negative errno code otherwise.
>    */
>   int drm_gem_ttm_vmap(struct drm_gem_object *gem,
> -		     struct dma_buf_map *map)
> +		     struct iosys_map *map)
>   {
>   	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
>   
> @@ -78,7 +78,7 @@ EXPORT_SYMBOL(drm_gem_ttm_vmap);
>    * &drm_gem_object_funcs.vmap callback.
>    */
>   void drm_gem_ttm_vunmap(struct drm_gem_object *gem,
> -			struct dma_buf_map *map)
> +			struct iosys_map *map)
>   {
>   	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
>   
> diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
> index 3f00192215d1..dc7f938bfff2 100644
> --- a/drivers/gpu/drm/drm_gem_vram_helper.c
> +++ b/drivers/gpu/drm/drm_gem_vram_helper.c
> @@ -1,6 +1,6 @@
>   // SPDX-License-Identifier: GPL-2.0-or-later
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/module.h>
>   
>   #include <drm/drm_debugfs.h>
> @@ -116,7 +116,7 @@ static void drm_gem_vram_cleanup(struct drm_gem_vram_object *gbo)
>   	 */
>   
>   	WARN_ON(gbo->vmap_use_count);
> -	WARN_ON(dma_buf_map_is_set(&gbo->map));
> +	WARN_ON(iosys_map_is_set(&gbo->map));
>   
>   	drm_gem_object_release(&gbo->bo.base);
>   }
> @@ -365,7 +365,7 @@ int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo)
>   EXPORT_SYMBOL(drm_gem_vram_unpin);
>   
>   static int drm_gem_vram_kmap_locked(struct drm_gem_vram_object *gbo,
> -				    struct dma_buf_map *map)
> +				    struct iosys_map *map)
>   {
>   	int ret;
>   
> @@ -377,7 +377,7 @@ static int drm_gem_vram_kmap_locked(struct drm_gem_vram_object *gbo,
>   	 * page mapping might still be around. Only vmap if the there's
>   	 * no mapping present.
>   	 */
> -	if (dma_buf_map_is_null(&gbo->map)) {
> +	if (iosys_map_is_null(&gbo->map)) {
>   		ret = ttm_bo_vmap(&gbo->bo, &gbo->map);
>   		if (ret)
>   			return ret;
> @@ -391,14 +391,14 @@ static int drm_gem_vram_kmap_locked(struct drm_gem_vram_object *gbo,
>   }
>   
>   static void drm_gem_vram_kunmap_locked(struct drm_gem_vram_object *gbo,
> -				       struct dma_buf_map *map)
> +				       struct iosys_map *map)
>   {
>   	struct drm_device *dev = gbo->bo.base.dev;
>   
>   	if (drm_WARN_ON_ONCE(dev, !gbo->vmap_use_count))
>   		return;
>   
> -	if (drm_WARN_ON_ONCE(dev, !dma_buf_map_is_equal(&gbo->map, map)))
> +	if (drm_WARN_ON_ONCE(dev, !iosys_map_is_equal(&gbo->map, map)))
>   		return; /* BUG: map not mapped from this BO */
>   
>   	if (--gbo->vmap_use_count > 0)
> @@ -428,7 +428,7 @@ static void drm_gem_vram_kunmap_locked(struct drm_gem_vram_object *gbo,
>    * Returns:
>    * 0 on success, or a negative error code otherwise.
>    */
> -int drm_gem_vram_vmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map)
> +int drm_gem_vram_vmap(struct drm_gem_vram_object *gbo, struct iosys_map *map)
>   {
>   	int ret;
>   
> @@ -463,7 +463,8 @@ EXPORT_SYMBOL(drm_gem_vram_vmap);
>    * A call to drm_gem_vram_vunmap() unmaps and unpins a GEM VRAM buffer. See
>    * the documentation for drm_gem_vram_vmap() for more information.
>    */
> -void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map)
> +void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo,
> +			 struct iosys_map *map)
>   {
>   	int ret;
>   
> @@ -567,7 +568,7 @@ static void drm_gem_vram_bo_driver_move_notify(struct drm_gem_vram_object *gbo)
>   		return;
>   
>   	ttm_bo_vunmap(bo, &gbo->map);
> -	dma_buf_map_clear(&gbo->map); /* explicitly clear mapping for next vmap call */
> +	iosys_map_clear(&gbo->map); /* explicitly clear mapping for next vmap call */
>   }
>   
>   static int drm_gem_vram_bo_driver_move(struct drm_gem_vram_object *gbo,
> @@ -802,7 +803,8 @@ static void drm_gem_vram_object_unpin(struct drm_gem_object *gem)
>    * Returns:
>    * 0 on success, or a negative error code otherwise.
>    */
> -static int drm_gem_vram_object_vmap(struct drm_gem_object *gem, struct dma_buf_map *map)
> +static int drm_gem_vram_object_vmap(struct drm_gem_object *gem,
> +				    struct iosys_map *map)
>   {
>   	struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
>   
> @@ -815,7 +817,8 @@ static int drm_gem_vram_object_vmap(struct drm_gem_object *gem, struct dma_buf_m
>    * @gem: The GEM object to unmap
>    * @map: Kernel virtual address where the VRAM GEM object was mapped
>    */
> -static void drm_gem_vram_object_vunmap(struct drm_gem_object *gem, struct dma_buf_map *map)
> +static void drm_gem_vram_object_vunmap(struct drm_gem_object *gem,
> +				       struct iosys_map *map)
>   {
>   	struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
>   
> diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
> index 17f3548c8ed2..1fbbc19f1ac0 100644
> --- a/drivers/gpu/drm/drm_internal.h
> +++ b/drivers/gpu/drm/drm_internal.h
> @@ -33,7 +33,7 @@
>   
>   struct dentry;
>   struct dma_buf;
> -struct dma_buf_map;
> +struct iosys_map;
>   struct drm_connector;
>   struct drm_crtc;
>   struct drm_framebuffer;
> @@ -174,8 +174,8 @@ void drm_gem_print_info(struct drm_printer *p, unsigned int indent,
>   
>   int drm_gem_pin(struct drm_gem_object *obj);
>   void drm_gem_unpin(struct drm_gem_object *obj);
> -int drm_gem_vmap(struct drm_gem_object *obj, struct dma_buf_map *map);
> -void drm_gem_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map);
> +int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map);
> +void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map);
>   
>   int drm_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev,
>   			 u32 handle);
> diff --git a/drivers/gpu/drm/drm_mipi_dbi.c b/drivers/gpu/drm/drm_mipi_dbi.c
> index 0327d595e028..9314f2ead79f 100644
> --- a/drivers/gpu/drm/drm_mipi_dbi.c
> +++ b/drivers/gpu/drm/drm_mipi_dbi.c
> @@ -201,8 +201,8 @@ int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
>   		      struct drm_rect *clip, bool swap)
>   {
>   	struct drm_gem_object *gem = drm_gem_fb_get_obj(fb, 0);
> -	struct dma_buf_map map[DRM_FORMAT_MAX_PLANES];
> -	struct dma_buf_map data[DRM_FORMAT_MAX_PLANES];
> +	struct iosys_map map[DRM_FORMAT_MAX_PLANES];
> +	struct iosys_map data[DRM_FORMAT_MAX_PLANES];
>   	void *src;
>   	int ret;
>   
> @@ -258,8 +258,8 @@ static void mipi_dbi_set_window_address(struct mipi_dbi_dev *dbidev,
>   
>   static void mipi_dbi_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
>   {
> -	struct dma_buf_map map[DRM_FORMAT_MAX_PLANES];
> -	struct dma_buf_map data[DRM_FORMAT_MAX_PLANES];
> +	struct iosys_map map[DRM_FORMAT_MAX_PLANES];
> +	struct iosys_map data[DRM_FORMAT_MAX_PLANES];
>   	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
>   	unsigned int height = rect->y2 - rect->y1;
>   	unsigned int width = rect->x2 - rect->x1;
> diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
> index c773d3dfb1ab..e3f09f18110c 100644
> --- a/drivers/gpu/drm/drm_prime.c
> +++ b/drivers/gpu/drm/drm_prime.c
> @@ -674,7 +674,7 @@ EXPORT_SYMBOL(drm_gem_unmap_dma_buf);
>    *
>    * Returns 0 on success or a negative errno code otherwise.
>    */
> -int drm_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct dma_buf_map *map)
> +int drm_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct iosys_map *map)
>   {
>   	struct drm_gem_object *obj = dma_buf->priv;
>   
> @@ -690,7 +690,7 @@ EXPORT_SYMBOL(drm_gem_dmabuf_vmap);
>    * Releases a kernel virtual mapping. This can be used as the
>    * &dma_buf_ops.vunmap callback. Calls into &drm_gem_object_funcs.vunmap for device specific handling.
>    */
> -void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct dma_buf_map *map)
> +void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct iosys_map *map)
>   {
>   	struct drm_gem_object *obj = dma_buf->priv;
>   
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.h b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
> index 049ae87de9be..f32f4771dada 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.h
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
> @@ -49,7 +49,7 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
>   
>   int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset);
>   struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj);
> -int etnaviv_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map);
> +int etnaviv_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map);
>   struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev,
>   	struct dma_buf_attachment *attach, struct sg_table *sg);
>   int etnaviv_gem_prime_pin(struct drm_gem_object *obj);
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
> index 6788ea8490d1..3fa2da149639 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
> @@ -25,14 +25,14 @@ struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj)
>   	return drm_prime_pages_to_sg(obj->dev, etnaviv_obj->pages, npages);
>   }
>   
> -int etnaviv_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +int etnaviv_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
>   {
>   	void *vaddr;
>   
>   	vaddr = etnaviv_gem_vmap(obj);
>   	if (!vaddr)
>   		return -ENOMEM;
> -	dma_buf_map_set_vaddr(map, vaddr);
> +	iosys_map_set_vaddr(map, vaddr);
>   
>   	return 0;
>   }
> @@ -62,7 +62,7 @@ void etnaviv_gem_prime_unpin(struct drm_gem_object *obj)
>   
>   static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj)
>   {
> -	struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(etnaviv_obj->vaddr);
> +	struct iosys_map map = IOSYS_MAP_INIT_VADDR(etnaviv_obj->vaddr);
>   
>   	if (etnaviv_obj->vaddr)
>   		dma_buf_vunmap(etnaviv_obj->base.import_attach->dmabuf, &map);
> @@ -77,7 +77,7 @@ static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj)
>   
>   static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj)
>   {
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	int ret;
>   
>   	lockdep_assert_held(&etnaviv_obj->lock);
> diff --git a/drivers/gpu/drm/gud/gud_pipe.c b/drivers/gpu/drm/gud/gud_pipe.c
> index a150a5a4b5d4..4873f9799f41 100644
> --- a/drivers/gpu/drm/gud/gud_pipe.c
> +++ b/drivers/gpu/drm/gud/gud_pipe.c
> @@ -152,8 +152,8 @@ static int gud_prep_flush(struct gud_device *gdrm, struct drm_framebuffer *fb,
>   {
>   	struct dma_buf_attachment *import_attach = fb->obj[0]->import_attach;
>   	u8 compression = gdrm->compression;
> -	struct dma_buf_map map[DRM_FORMAT_MAX_PLANES];
> -	struct dma_buf_map map_data[DRM_FORMAT_MAX_PLANES];
> +	struct iosys_map map[DRM_FORMAT_MAX_PLANES];
> +	struct iosys_map map_data[DRM_FORMAT_MAX_PLANES];
>   	void *vaddr, *buf;
>   	size_t pitch, len;
>   	int ret = 0;
> diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c b/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
> index 93f51e70a951..e82b815f83a6 100644
> --- a/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
> +++ b/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
> @@ -19,7 +19,7 @@
>   #include "hyperv_drm.h"
>   
>   static int hyperv_blit_to_vram_rect(struct drm_framebuffer *fb,
> -				    const struct dma_buf_map *map,
> +				    const struct iosys_map *map,
>   				    struct drm_rect *rect)
>   {
>   	struct hyperv_drm_device *hv = to_hv(fb->dev);
> @@ -38,7 +38,8 @@ static int hyperv_blit_to_vram_rect(struct drm_framebuffer *fb,
>   	return 0;
>   }
>   
> -static int hyperv_blit_to_vram_fullscreen(struct drm_framebuffer *fb, const struct dma_buf_map *map)
> +static int hyperv_blit_to_vram_fullscreen(struct drm_framebuffer *fb,
> +					  const struct iosys_map *map)
>   {
>   	struct drm_rect fullscreen = {
>   		.x1 = 0,
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
> index 1b526039a60d..14fdb0796c52 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
> @@ -74,7 +74,8 @@ static void i915_gem_unmap_dma_buf(struct dma_buf_attachment *attachment,
>   	kfree(sg);
>   }
>   
> -static int i915_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct dma_buf_map *map)
> +static int i915_gem_dmabuf_vmap(struct dma_buf *dma_buf,
> +				struct iosys_map *map)
>   {
>   	struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf);
>   	void *vaddr;
> @@ -83,12 +84,13 @@ static int i915_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct dma_buf_map *map
>   	if (IS_ERR(vaddr))
>   		return PTR_ERR(vaddr);
>   
> -	dma_buf_map_set_vaddr(map, vaddr);
> +	iosys_map_set_vaddr(map, vaddr);
>   
>   	return 0;
>   }
>   
> -static void i915_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct dma_buf_map *map)
> +static void i915_gem_dmabuf_vunmap(struct dma_buf *dma_buf,
> +				   struct iosys_map *map)
>   {
>   	struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf);
>   
> diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c
> index 3cc74b0fed06..b071a58dd6da 100644
> --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c
> +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c
> @@ -266,7 +266,7 @@ static int igt_dmabuf_import(void *arg)
>   	struct drm_i915_gem_object *obj;
>   	struct dma_buf *dmabuf;
>   	void *obj_map, *dma_map;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	u32 pattern[] = { 0, 0xaa, 0xcc, 0x55, 0xff };
>   	int err, i;
>   
> @@ -349,7 +349,7 @@ static int igt_dmabuf_import_ownership(void *arg)
>   	struct drm_i915_private *i915 = arg;
>   	struct drm_i915_gem_object *obj;
>   	struct dma_buf *dmabuf;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	void *ptr;
>   	int err;
>   
> @@ -400,7 +400,7 @@ static int igt_dmabuf_export_vmap(void *arg)
>   	struct drm_i915_private *i915 = arg;
>   	struct drm_i915_gem_object *obj;
>   	struct dma_buf *dmabuf;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	void *ptr;
>   	int err;
>   
> diff --git a/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c b/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c
> index 2855d11c7a51..b2a5882b8f81 100644
> --- a/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c
> +++ b/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c
> @@ -61,7 +61,7 @@ static void mock_dmabuf_release(struct dma_buf *dma_buf)
>   	kfree(mock);
>   }
>   
> -static int mock_dmabuf_vmap(struct dma_buf *dma_buf, struct dma_buf_map *map)
> +static int mock_dmabuf_vmap(struct dma_buf *dma_buf, struct iosys_map *map)
>   {
>   	struct mock_dmabuf *mock = to_mock(dma_buf);
>   	void *vaddr;
> @@ -69,12 +69,12 @@ static int mock_dmabuf_vmap(struct dma_buf *dma_buf, struct dma_buf_map *map)
>   	vaddr = vm_map_ram(mock->pages, mock->npages, 0);
>   	if (!vaddr)
>   		return -ENOMEM;
> -	dma_buf_map_set_vaddr(map, vaddr);
> +	iosys_map_set_vaddr(map, vaddr);
>   
>   	return 0;
>   }
>   
> -static void mock_dmabuf_vunmap(struct dma_buf *dma_buf, struct dma_buf_map *map)
> +static void mock_dmabuf_vunmap(struct dma_buf *dma_buf, struct iosys_map *map)
>   {
>   	struct mock_dmabuf *mock = to_mock(dma_buf);
>   
> diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c
> index f9a9198ef198..d0c2b1422b3b 100644
> --- a/drivers/gpu/drm/lima/lima_gem.c
> +++ b/drivers/gpu/drm/lima/lima_gem.c
> @@ -2,6 +2,7 @@
>   /* Copyright 2017-2019 Qiang Yu <yuq825@xxxxxxxxx> */
>   
>   #include <linux/mm.h>
> +#include <linux/iosys-map.h>
>   #include <linux/sync_file.h>
>   #include <linux/pagemap.h>
>   #include <linux/shmem_fs.h>
> @@ -182,7 +183,7 @@ static int lima_gem_pin(struct drm_gem_object *obj)
>   	return drm_gem_shmem_pin(&bo->base);
>   }
>   
> -static int lima_gem_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +static int lima_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map)
>   {
>   	struct lima_bo *bo = to_lima_bo(obj);
>   
> diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
> index 5612d73f238f..390c969f74ad 100644
> --- a/drivers/gpu/drm/lima/lima_sched.c
> +++ b/drivers/gpu/drm/lima/lima_sched.c
> @@ -1,7 +1,7 @@
>   // SPDX-License-Identifier: GPL-2.0 OR MIT
>   /* Copyright 2017-2019 Qiang Yu <yuq825@xxxxxxxxx> */
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/kthread.h>
>   #include <linux/slab.h>
>   #include <linux/vmalloc.h>
> @@ -284,7 +284,7 @@ static void lima_sched_build_error_task_list(struct lima_sched_task *task)
>   	struct lima_dump_chunk_buffer *buffer_chunk;
>   	u32 size, task_size, mem_size;
>   	int i;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	int ret;
>   
>   	mutex_lock(&dev->error_task_list_lock);
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.c b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
> index d0544962cfc1..139d7724c6d0 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_gem.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
> @@ -220,7 +220,7 @@ struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
>   	return &mtk_gem->base;
>   }
>   
> -int mtk_drm_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +int mtk_drm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
>   {
>   	struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
>   	struct sg_table *sgt = NULL;
> @@ -247,12 +247,13 @@ int mtk_drm_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
>   
>   out:
>   	kfree(sgt);
> -	dma_buf_map_set_vaddr(map, mtk_gem->kvaddr);
> +	iosys_map_set_vaddr(map, mtk_gem->kvaddr);
>   
>   	return 0;
>   }
>   
> -void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj,
> +			      struct iosys_map *map)
>   {
>   	struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
>   	void *vaddr = map->vaddr;
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.h b/drivers/gpu/drm/mediatek/mtk_drm_gem.h
> index 9a359a06cb73..78f23b07a02e 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_gem.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.h
> @@ -42,7 +42,8 @@ int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
>   struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
>   struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
>   			struct dma_buf_attachment *attach, struct sg_table *sg);
> -int mtk_drm_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map);
> -void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map);
> +int mtk_drm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map);
> +void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj,
> +			      struct iosys_map *map);
>   
>   #endif
> diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
> index cd9ba13ad5fc..6e18d3bbd720 100644
> --- a/drivers/gpu/drm/mgag200/mgag200_mode.c
> +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
> @@ -9,7 +9,7 @@
>    */
>   
>   #include <linux/delay.h>
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   
>   #include <drm/drm_atomic_helper.h>
>   #include <drm/drm_atomic_state_helper.h>
> @@ -848,7 +848,7 @@ mgag200_simple_display_pipe_mode_valid(struct drm_simple_display_pipe *pipe,
>   
>   static void
>   mgag200_handle_damage(struct mga_device *mdev, struct drm_framebuffer *fb,
> -		      struct drm_rect *clip, const struct dma_buf_map *map)
> +		      struct drm_rect *clip, const struct iosys_map *map)
>   {
>   	void __iomem *dst = mdev->vram;
>   	void *vmap = map->vaddr; /* TODO: Use mapping abstraction properly */
> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> index eb984d925f4d..c70868a3ac53 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -306,8 +306,8 @@ void msm_gem_shrinker_init(struct drm_device *dev);
>   void msm_gem_shrinker_cleanup(struct drm_device *dev);
>   
>   struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj);
> -int msm_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map);
> -void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map);
> +int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map);
> +void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map);
>   struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
>   		struct dma_buf_attachment *attach, struct sg_table *sg);
>   int msm_gem_prime_pin(struct drm_gem_object *obj);
> diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c
> index fc94e061d6a7..e8f1b7a2ca9c 100644
> --- a/drivers/gpu/drm/msm/msm_gem_prime.c
> +++ b/drivers/gpu/drm/msm/msm_gem_prime.c
> @@ -22,19 +22,19 @@ struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
>   	return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
>   }
>   
> -int msm_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
>   {
>   	void *vaddr;
>   
>   	vaddr = msm_gem_get_vaddr(obj);
>   	if (IS_ERR(vaddr))
>   		return PTR_ERR(vaddr);
> -	dma_buf_map_set_vaddr(map, vaddr);
> +	iosys_map_set_vaddr(map, vaddr);
>   
>   	return 0;
>   }
>   
> -void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
>   {
>   	msm_gem_put_vaddr(obj);
>   }
> diff --git a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c
> index 1d36df5af98d..bc0df93f7f21 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c
> @@ -1,16 +1,17 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /* Copyright 2019 Collabora Ltd */
>   
> -#include <drm/drm_file.h>
> -#include <drm/drm_gem_shmem_helper.h>
> -#include <drm/panfrost_drm.h>
>   #include <linux/completion.h>
> -#include <linux/dma-buf-map.h>
>   #include <linux/iopoll.h>
> +#include <linux/iosys-map.h>
>   #include <linux/pm_runtime.h>
>   #include <linux/slab.h>
>   #include <linux/uaccess.h>
>   
> +#include <drm/drm_file.h>
> +#include <drm/drm_gem_shmem_helper.h>
> +#include <drm/panfrost_drm.h>
> +
>   #include "panfrost_device.h"
>   #include "panfrost_features.h"
>   #include "panfrost_gem.h"
> @@ -73,7 +74,7 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev,
>   {
>   	struct panfrost_file_priv *user = file_priv->driver_priv;
>   	struct panfrost_perfcnt *perfcnt = pfdev->perfcnt;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	struct drm_gem_shmem_object *bo;
>   	u32 cfg, as;
>   	int ret;
> @@ -181,7 +182,7 @@ static int panfrost_perfcnt_disable_locked(struct panfrost_device *pfdev,
>   {
>   	struct panfrost_file_priv *user = file_priv->driver_priv;
>   	struct panfrost_perfcnt *perfcnt = pfdev->perfcnt;
> -	struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(perfcnt->buf);
> +	struct iosys_map map = IOSYS_MAP_INIT_VADDR(perfcnt->buf);
>   
>   	if (user != perfcnt->user)
>   		return -EINVAL;
> diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
> index 9e0a1e836011..9a9c29b1d3e1 100644
> --- a/drivers/gpu/drm/qxl/qxl_display.c
> +++ b/drivers/gpu/drm/qxl/qxl_display.c
> @@ -25,7 +25,7 @@
>   
>   #include <linux/crc32.h>
>   #include <linux/delay.h>
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   
>   #include <drm/drm_drv.h>
>   #include <drm/drm_atomic.h>
> @@ -566,8 +566,8 @@ static struct qxl_bo *qxl_create_cursor(struct qxl_device *qdev,
>   {
>   	static const u32 size = 64 * 64 * 4;
>   	struct qxl_bo *cursor_bo;
> -	struct dma_buf_map cursor_map;
> -	struct dma_buf_map user_map;
> +	struct iosys_map cursor_map;
> +	struct iosys_map user_map;
>   	struct qxl_cursor cursor;
>   	int ret;
>   
> @@ -1183,7 +1183,7 @@ int qxl_create_monitors_object(struct qxl_device *qdev)
>   {
>   	int ret;
>   	struct drm_gem_object *gobj;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	int monitors_config_size = sizeof(struct qxl_monitors_config) +
>   		qxl_num_crtc * sizeof(struct qxl_head);
>   
> diff --git a/drivers/gpu/drm/qxl/qxl_draw.c b/drivers/gpu/drm/qxl/qxl_draw.c
> index 7d27891e87fa..a93de9e1977a 100644
> --- a/drivers/gpu/drm/qxl/qxl_draw.c
> +++ b/drivers/gpu/drm/qxl/qxl_draw.c
> @@ -20,7 +20,7 @@
>    * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
>    */
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   
>   #include <drm/drm_fourcc.h>
>   
> @@ -44,7 +44,7 @@ static struct qxl_rect *drawable_set_clipping(struct qxl_device *qdev,
>   					      unsigned int num_clips,
>   					      struct qxl_bo *clips_bo)
>   {
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	struct qxl_clip_rects *dev_clips;
>   	int ret;
>   
> @@ -146,7 +146,7 @@ void qxl_draw_dirty_fb(struct qxl_device *qdev,
>   	int stride = fb->pitches[0];
>   	/* depth is not actually interesting, we don't mask with it */
>   	int depth = fb->format->cpp[0] * 8;
> -	struct dma_buf_map surface_map;
> +	struct iosys_map surface_map;
>   	uint8_t *surface_base;
>   	struct qxl_release *release;
>   	struct qxl_bo *clips_bo;
> diff --git a/drivers/gpu/drm/qxl/qxl_drv.h b/drivers/gpu/drm/qxl/qxl_drv.h
> index 29641ceaab7d..47c169673088 100644
> --- a/drivers/gpu/drm/qxl/qxl_drv.h
> +++ b/drivers/gpu/drm/qxl/qxl_drv.h
> @@ -30,7 +30,7 @@
>    * Definitions taken from spice-protocol, plus kernel driver specific bits.
>    */
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/dma-fence.h>
>   #include <linux/firmware.h>
>   #include <linux/platform_device.h>
> @@ -50,7 +50,7 @@
>   
>   #include "qxl_dev.h"
>   
> -struct dma_buf_map;
> +struct iosys_map;
>   
>   #define DRIVER_AUTHOR		"Dave Airlie"
>   
> @@ -80,7 +80,7 @@ struct qxl_bo {
>   	/* Protected by tbo.reserved */
>   	struct ttm_place		placements[3];
>   	struct ttm_placement		placement;
> -	struct dma_buf_map		map;
> +	struct iosys_map		map;
>   	void				*kptr;
>   	unsigned int                    map_count;
>   	int                             type;
> @@ -427,9 +427,9 @@ struct sg_table *qxl_gem_prime_get_sg_table(struct drm_gem_object *obj);
>   struct drm_gem_object *qxl_gem_prime_import_sg_table(
>   	struct drm_device *dev, struct dma_buf_attachment *attach,
>   	struct sg_table *sgt);
> -int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map);
> +int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map);
>   void qxl_gem_prime_vunmap(struct drm_gem_object *obj,
> -			  struct dma_buf_map *map);
> +			  struct iosys_map *map);
>   
>   /* qxl_irq.c */
>   int qxl_irq_init(struct qxl_device *qdev);
> diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
> index fbb36e3e8564..b42a657e4c2f 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.c
> +++ b/drivers/gpu/drm/qxl/qxl_object.c
> @@ -23,7 +23,7 @@
>    *          Alon Levy
>    */
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/io-mapping.h>
>   
>   #include "qxl_drv.h"
> @@ -158,7 +158,7 @@ int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
>   	return 0;
>   }
>   
> -int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
> +int qxl_bo_vmap_locked(struct qxl_bo *bo, struct iosys_map *map)
>   {
>   	int r;
>   
> @@ -184,7 +184,7 @@ int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
>   	return 0;
>   }
>   
> -int qxl_bo_vmap(struct qxl_bo *bo, struct dma_buf_map *map)
> +int qxl_bo_vmap(struct qxl_bo *bo, struct iosys_map *map)
>   {
>   	int r;
>   
> @@ -210,7 +210,7 @@ void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
>   	void *rptr;
>   	int ret;
>   	struct io_mapping *map;
> -	struct dma_buf_map bo_map;
> +	struct iosys_map bo_map;
>   
>   	if (bo->tbo.resource->mem_type == TTM_PL_VRAM)
>   		map = qdev->vram_mapping;
> diff --git a/drivers/gpu/drm/qxl/qxl_object.h b/drivers/gpu/drm/qxl/qxl_object.h
> index cee4b52b75dd..53392cb90eec 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.h
> +++ b/drivers/gpu/drm/qxl/qxl_object.h
> @@ -59,8 +59,8 @@ extern int qxl_bo_create(struct qxl_device *qdev,
>   			 u32 priority,
>   			 struct qxl_surface *surf,
>   			 struct qxl_bo **bo_ptr);
> -int qxl_bo_vmap(struct qxl_bo *bo, struct dma_buf_map *map);
> -int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map);
> +int qxl_bo_vmap(struct qxl_bo *bo, struct iosys_map *map);
> +int qxl_bo_vmap_locked(struct qxl_bo *bo, struct iosys_map *map);
>   int qxl_bo_vunmap(struct qxl_bo *bo);
>   void qxl_bo_vunmap_locked(struct qxl_bo *bo);
>   void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, int page_offset);
> diff --git a/drivers/gpu/drm/qxl/qxl_prime.c b/drivers/gpu/drm/qxl/qxl_prime.c
> index 4a10cb0a413b..142d01415acb 100644
> --- a/drivers/gpu/drm/qxl/qxl_prime.c
> +++ b/drivers/gpu/drm/qxl/qxl_prime.c
> @@ -54,7 +54,7 @@ struct drm_gem_object *qxl_gem_prime_import_sg_table(
>   	return ERR_PTR(-ENOSYS);
>   }
>   
> -int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
>   {
>   	struct qxl_bo *bo = gem_to_qxl_bo(obj);
>   	int ret;
> @@ -67,7 +67,7 @@ int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
>   }
>   
>   void qxl_gem_prime_vunmap(struct drm_gem_object *obj,
> -			  struct dma_buf_map *map)
> +			  struct iosys_map *map)
>   {
>   	struct qxl_bo *bo = gem_to_qxl_bo(obj);
>   
> diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c
> index a36a4f2c76b0..f563284a7fac 100644
> --- a/drivers/gpu/drm/radeon/radeon_gem.c
> +++ b/drivers/gpu/drm/radeon/radeon_gem.c
> @@ -26,6 +26,7 @@
>    *          Jerome Glisse
>    */
>   
> +#include <linux/iosys-map.h>
>   #include <linux/pci.h>
>   
>   #include <drm/drm_device.h>
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
> index 63eb73b624aa..985584147da1 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
> @@ -510,7 +510,7 @@ rockchip_gem_prime_import_sg_table(struct drm_device *drm,
>   	return ERR_PTR(ret);
>   }
>   
> -int rockchip_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +int rockchip_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
>   {
>   	struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
>   
> @@ -519,18 +519,19 @@ int rockchip_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
>   				  pgprot_writecombine(PAGE_KERNEL));
>   		if (!vaddr)
>   			return -ENOMEM;
> -		dma_buf_map_set_vaddr(map, vaddr);
> +		iosys_map_set_vaddr(map, vaddr);
>   		return 0;
>   	}
>   
>   	if (rk_obj->dma_attrs & DMA_ATTR_NO_KERNEL_MAPPING)
>   		return -ENOMEM;
> -	dma_buf_map_set_vaddr(map, rk_obj->kvaddr);
> +	iosys_map_set_vaddr(map, rk_obj->kvaddr);
>   
>   	return 0;
>   }
>   
> -void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +void rockchip_gem_prime_vunmap(struct drm_gem_object *obj,
> +			       struct iosys_map *map)
>   {
>   	struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
>   
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h
> index 47c1861eece0..72f59ac6d258 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h
> @@ -31,8 +31,9 @@ struct drm_gem_object *
>   rockchip_gem_prime_import_sg_table(struct drm_device *dev,
>   				   struct dma_buf_attachment *attach,
>   				   struct sg_table *sg);
> -int rockchip_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map);
> -void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map);
> +int rockchip_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map);
> +void rockchip_gem_prime_vunmap(struct drm_gem_object *obj,
> +			       struct iosys_map *map);
>   
>   struct rockchip_gem_object *
>   	rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
> diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
> index d38fd7e12b57..ef208384665e 100644
> --- a/drivers/gpu/drm/tegra/gem.c
> +++ b/drivers/gpu/drm/tegra/gem.c
> @@ -135,7 +135,7 @@ static void tegra_bo_unpin(struct device *dev, struct sg_table *sgt)
>   static void *tegra_bo_mmap(struct host1x_bo *bo)
>   {
>   	struct tegra_bo *obj = host1x_to_tegra_bo(bo);
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	int ret;
>   
>   	if (obj->vaddr) {
> @@ -152,7 +152,7 @@ static void *tegra_bo_mmap(struct host1x_bo *bo)
>   static void tegra_bo_munmap(struct host1x_bo *bo, void *addr)
>   {
>   	struct tegra_bo *obj = host1x_to_tegra_bo(bo);
> -	struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(addr);
> +	struct iosys_map map = IOSYS_MAP_INIT_VADDR(addr);
>   
>   	if (obj->vaddr)
>   		return;
> @@ -650,17 +650,17 @@ static int tegra_gem_prime_mmap(struct dma_buf *buf, struct vm_area_struct *vma)
>   	return __tegra_gem_mmap(gem, vma);
>   }
>   
> -static int tegra_gem_prime_vmap(struct dma_buf *buf, struct dma_buf_map *map)
> +static int tegra_gem_prime_vmap(struct dma_buf *buf, struct iosys_map *map)
>   {
>   	struct drm_gem_object *gem = buf->priv;
>   	struct tegra_bo *bo = to_tegra_bo(gem);
>   
> -	dma_buf_map_set_vaddr(map, bo->vaddr);
> +	iosys_map_set_vaddr(map, bo->vaddr);
>   
>   	return 0;
>   }
>   
> -static void tegra_gem_prime_vunmap(struct dma_buf *buf, struct dma_buf_map *map)
> +static void tegra_gem_prime_vunmap(struct dma_buf *buf, struct iosys_map *map)
>   {
>   }
>   
> diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c
> index ecf2475d0f16..c8e791840862 100644
> --- a/drivers/gpu/drm/tiny/cirrus.c
> +++ b/drivers/gpu/drm/tiny/cirrus.c
> @@ -16,7 +16,7 @@
>    * Copyright 1999-2001 Jeff Garzik <jgarzik@xxxxxxxxx>
>    */
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/module.h>
>   #include <linux/pci.h>
>   
> @@ -313,7 +313,8 @@ static int cirrus_mode_set(struct cirrus_device *cirrus,
>   	return 0;
>   }
>   
> -static int cirrus_fb_blit_rect(struct drm_framebuffer *fb, const struct dma_buf_map *map,
> +static int cirrus_fb_blit_rect(struct drm_framebuffer *fb,
> +			       const struct iosys_map *map,
>   			       struct drm_rect *rect)
>   {
>   	struct cirrus_device *cirrus = to_cirrus(fb->dev);
> @@ -345,7 +346,8 @@ static int cirrus_fb_blit_rect(struct drm_framebuffer *fb, const struct dma_buf_
>   	return 0;
>   }
>   
> -static int cirrus_fb_blit_fullscreen(struct drm_framebuffer *fb, const struct dma_buf_map *map)
> +static int cirrus_fb_blit_fullscreen(struct drm_framebuffer *fb,
> +				     const struct iosys_map *map)
>   {
>   	struct drm_rect fullscreen = {
>   		.x1 = 0,
> diff --git a/drivers/gpu/drm/tiny/gm12u320.c b/drivers/gpu/drm/tiny/gm12u320.c
> index 6bc0c298739c..648e585d40a8 100644
> --- a/drivers/gpu/drm/tiny/gm12u320.c
> +++ b/drivers/gpu/drm/tiny/gm12u320.c
> @@ -95,7 +95,7 @@ struct gm12u320_device {
>   		struct drm_rect          rect;
>   		int frame;
>   		int draw_status_timeout;
> -		struct dma_buf_map src_map;
> +		struct iosys_map src_map;
>   	} fb_update;
>   };
>   
> @@ -395,7 +395,8 @@ static void gm12u320_fb_update_work(struct work_struct *work)
>   		GM12U320_ERR("Frame update error: %d\n", ret);
>   }
>   
> -static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb, const struct dma_buf_map *map,
> +static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb,
> +				   const struct iosys_map *map,
>   				   struct drm_rect *dirty)
>   {
>   	struct gm12u320_device *gm12u320 = to_gm12u320(fb->dev);
> @@ -438,7 +439,7 @@ static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320)
>   	mutex_lock(&gm12u320->fb_update.lock);
>   	old_fb = gm12u320->fb_update.fb;
>   	gm12u320->fb_update.fb = NULL;
> -	dma_buf_map_clear(&gm12u320->fb_update.src_map);
> +	iosys_map_clear(&gm12u320->fb_update.src_map);
>   	mutex_unlock(&gm12u320->fb_update.lock);
>   
>   	drm_framebuffer_put(old_fb);
> diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
> index 544a84fa6589..2b8caa1efaa3 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo_util.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
> @@ -33,7 +33,7 @@
>   #include <drm/ttm/ttm_placement.h>
>   #include <drm/drm_cache.h>
>   #include <drm/drm_vma_manager.h>
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/io.h>
>   #include <linux/highmem.h>
>   #include <linux/wait.h>
> @@ -93,7 +93,7 @@ void ttm_move_memcpy(bool clear,
>   {
>   	const struct ttm_kmap_iter_ops *dst_ops = dst_iter->ops;
>   	const struct ttm_kmap_iter_ops *src_ops = src_iter->ops;
> -	struct dma_buf_map src_map, dst_map;
> +	struct iosys_map src_map, dst_map;
>   	pgoff_t i;
>   
>   	/* Single TTM move. NOP */
> @@ -390,7 +390,7 @@ void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
>   }
>   EXPORT_SYMBOL(ttm_bo_kunmap);
>   
> -int ttm_bo_vmap(struct ttm_buffer_object *bo, struct dma_buf_map *map)
> +int ttm_bo_vmap(struct ttm_buffer_object *bo, struct iosys_map *map)
>   {
>   	struct ttm_resource *mem = bo->resource;
>   	int ret;
> @@ -418,7 +418,7 @@ int ttm_bo_vmap(struct ttm_buffer_object *bo, struct dma_buf_map *map)
>   		if (!vaddr_iomem)
>   			return -ENOMEM;
>   
> -		dma_buf_map_set_vaddr_iomem(map, vaddr_iomem);
> +		iosys_map_set_vaddr_iomem(map, vaddr_iomem);
>   
>   	} else {
>   		struct ttm_operation_ctx ctx = {
> @@ -442,25 +442,25 @@ int ttm_bo_vmap(struct ttm_buffer_object *bo, struct dma_buf_map *map)
>   		if (!vaddr)
>   			return -ENOMEM;
>   
> -		dma_buf_map_set_vaddr(map, vaddr);
> +		iosys_map_set_vaddr(map, vaddr);
>   	}
>   
>   	return 0;
>   }
>   EXPORT_SYMBOL(ttm_bo_vmap);
>   
> -void ttm_bo_vunmap(struct ttm_buffer_object *bo, struct dma_buf_map *map)
> +void ttm_bo_vunmap(struct ttm_buffer_object *bo, struct iosys_map *map)
>   {
>   	struct ttm_resource *mem = bo->resource;
>   
> -	if (dma_buf_map_is_null(map))
> +	if (iosys_map_is_null(map))
>   		return;
>   
>   	if (!map->is_iomem)
>   		vunmap(map->vaddr);
>   	else if (!mem->bus.addr)
>   		iounmap(map->vaddr_iomem);
> -	dma_buf_map_clear(map);
> +	iosys_map_clear(map);
>   
>   	ttm_mem_io_free(bo->bdev, bo->resource);
>   }
> diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c
> index 68344c90549b..eedda3761506 100644
> --- a/drivers/gpu/drm/ttm/ttm_resource.c
> +++ b/drivers/gpu/drm/ttm/ttm_resource.c
> @@ -22,7 +22,7 @@
>    * Authors: Christian König
>    */
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/io-mapping.h>
>   #include <linux/scatterlist.h>
>   
> @@ -244,7 +244,7 @@ void ttm_resource_manager_debug(struct ttm_resource_manager *man,
>   EXPORT_SYMBOL(ttm_resource_manager_debug);
>   
>   static void ttm_kmap_iter_iomap_map_local(struct ttm_kmap_iter *iter,
> -					  struct dma_buf_map *dmap,
> +					  struct iosys_map *dmap,
>   					  pgoff_t i)
>   {
>   	struct ttm_kmap_iter_iomap *iter_io =
> @@ -271,11 +271,11 @@ static void ttm_kmap_iter_iomap_map_local(struct ttm_kmap_iter *iter,
>   	addr = io_mapping_map_local_wc(iter_io->iomap, iter_io->cache.offs +
>   				       (((resource_size_t)i - iter_io->cache.i)
>   					<< PAGE_SHIFT));
> -	dma_buf_map_set_vaddr_iomem(dmap, addr);
> +	iosys_map_set_vaddr_iomem(dmap, addr);
>   }
>   
>   static void ttm_kmap_iter_iomap_unmap_local(struct ttm_kmap_iter *iter,
> -					    struct dma_buf_map *map)
> +					    struct iosys_map *map)
>   {
>   	io_mapping_unmap_local(map->vaddr_iomem);
>   }
> @@ -326,14 +326,14 @@ EXPORT_SYMBOL(ttm_kmap_iter_iomap_init);
>    */
>   
>   static void ttm_kmap_iter_linear_io_map_local(struct ttm_kmap_iter *iter,
> -					      struct dma_buf_map *dmap,
> +					      struct iosys_map *dmap,
>   					      pgoff_t i)
>   {
>   	struct ttm_kmap_iter_linear_io *iter_io =
>   		container_of(iter, typeof(*iter_io), base);
>   
>   	*dmap = iter_io->dmap;
> -	dma_buf_map_incr(dmap, i * PAGE_SIZE);
> +	iosys_map_incr(dmap, i * PAGE_SIZE);
>   }
>   
>   static const struct ttm_kmap_iter_ops ttm_kmap_iter_linear_io_ops = {
> @@ -369,7 +369,7 @@ ttm_kmap_iter_linear_io_init(struct ttm_kmap_iter_linear_io *iter_io,
>   	}
>   
>   	if (mem->bus.addr) {
> -		dma_buf_map_set_vaddr(&iter_io->dmap, mem->bus.addr);
> +		iosys_map_set_vaddr(&iter_io->dmap, mem->bus.addr);
>   		iter_io->needs_unmap = false;
>   	} else {
>   		size_t bus_size = (size_t)mem->num_pages << PAGE_SHIFT;
> @@ -377,23 +377,23 @@ ttm_kmap_iter_linear_io_init(struct ttm_kmap_iter_linear_io *iter_io,
>   		iter_io->needs_unmap = true;
>   		memset(&iter_io->dmap, 0, sizeof(iter_io->dmap));
>   		if (mem->bus.caching == ttm_write_combined)
> -			dma_buf_map_set_vaddr_iomem(&iter_io->dmap,
> +			iosys_map_set_vaddr_iomem(&iter_io->dmap,
>   						    ioremap_wc(mem->bus.offset,
>   							       bus_size));
>   		else if (mem->bus.caching == ttm_cached)
> -			dma_buf_map_set_vaddr(&iter_io->dmap,
> +			iosys_map_set_vaddr(&iter_io->dmap,
>   					      memremap(mem->bus.offset, bus_size,
>   						       MEMREMAP_WB |
>   						       MEMREMAP_WT |
>   						       MEMREMAP_WC));
>   
>   		/* If uncached requested or if mapping cached or wc failed */
> -		if (dma_buf_map_is_null(&iter_io->dmap))
> -			dma_buf_map_set_vaddr_iomem(&iter_io->dmap,
> +		if (iosys_map_is_null(&iter_io->dmap))
> +			iosys_map_set_vaddr_iomem(&iter_io->dmap,
>   						    ioremap(mem->bus.offset,
>   							    bus_size));
>   
> -		if (dma_buf_map_is_null(&iter_io->dmap)) {
> +		if (iosys_map_is_null(&iter_io->dmap)) {
>   			ret = -ENOMEM;
>   			goto out_io_free;
>   		}
> @@ -422,7 +422,7 @@ ttm_kmap_iter_linear_io_fini(struct ttm_kmap_iter_linear_io *iter_io,
>   			     struct ttm_device *bdev,
>   			     struct ttm_resource *mem)
>   {
> -	if (iter_io->needs_unmap && dma_buf_map_is_set(&iter_io->dmap)) {
> +	if (iter_io->needs_unmap && iosys_map_is_set(&iter_io->dmap)) {
>   		if (iter_io->dmap.is_iomem)
>   			iounmap(iter_io->dmap.vaddr_iomem);
>   		else
> diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
> index 79c870a3bef8..ef6343b78d71 100644
> --- a/drivers/gpu/drm/ttm/ttm_tt.c
> +++ b/drivers/gpu/drm/ttm/ttm_tt.c
> @@ -406,18 +406,18 @@ void ttm_tt_mgr_init(unsigned long num_pages, unsigned long num_dma32_pages)
>   }
>   
>   static void ttm_kmap_iter_tt_map_local(struct ttm_kmap_iter *iter,
> -				       struct dma_buf_map *dmap,
> +				       struct iosys_map *dmap,
>   				       pgoff_t i)
>   {
>   	struct ttm_kmap_iter_tt *iter_tt =
>   		container_of(iter, typeof(*iter_tt), base);
>   
> -	dma_buf_map_set_vaddr(dmap, kmap_local_page_prot(iter_tt->tt->pages[i],
> +	iosys_map_set_vaddr(dmap, kmap_local_page_prot(iter_tt->tt->pages[i],
>   							 iter_tt->prot));
>   }
>   
>   static void ttm_kmap_iter_tt_unmap_local(struct ttm_kmap_iter *iter,
> -					 struct dma_buf_map *map)
> +					 struct iosys_map *map)
>   {
>   	kunmap_local(map->vaddr);
>   }
> diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c
> index 32232228dae9..e67c40a48fb4 100644
> --- a/drivers/gpu/drm/udl/udl_modeset.c
> +++ b/drivers/gpu/drm/udl/udl_modeset.c
> @@ -264,7 +264,8 @@ static int udl_aligned_damage_clip(struct drm_rect *clip, int x, int y,
>   	return 0;
>   }
>   
> -static int udl_handle_damage(struct drm_framebuffer *fb, const struct dma_buf_map *map,
> +static int udl_handle_damage(struct drm_framebuffer *fb,
> +			     const struct iosys_map *map,
>   			     int x, int y, int width, int height)
>   {
>   	struct drm_device *dev = fb->dev;
> diff --git a/drivers/gpu/drm/vboxvideo/vbox_mode.c b/drivers/gpu/drm/vboxvideo/vbox_mode.c
> index 4227a915b06a..4017b0a621fc 100644
> --- a/drivers/gpu/drm/vboxvideo/vbox_mode.c
> +++ b/drivers/gpu/drm/vboxvideo/vbox_mode.c
> @@ -10,7 +10,7 @@
>    *          Hans de Goede <hdegoede@xxxxxxxxxx>
>    */
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/export.h>
>   
>   #include <drm/drm_atomic.h>
> @@ -398,7 +398,7 @@ static void vbox_cursor_atomic_update(struct drm_plane *plane,
>   	u32 height = new_state->crtc_h;
>   	struct drm_shadow_plane_state *shadow_plane_state =
>   		to_drm_shadow_plane_state(new_state);
> -	struct dma_buf_map map = shadow_plane_state->data[0];
> +	struct iosys_map map = shadow_plane_state->data[0];
>   	u8 *src = map.vaddr; /* TODO: Use mapping abstraction properly */
>   	size_t data_size, mask_size;
>   	u32 flags;
> diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c
> index 9e8204be9a14..c6a1036bf2ea 100644
> --- a/drivers/gpu/drm/vkms/vkms_composer.c
> +++ b/drivers/gpu/drm/vkms/vkms_composer.c
> @@ -157,7 +157,7 @@ static void compose_plane(struct vkms_composer *primary_composer,
>   	void *vaddr;
>   	void (*pixel_blend)(const u8 *p_src, u8 *p_dst);
>   
> -	if (WARN_ON(dma_buf_map_is_null(&primary_composer->map[0])))
> +	if (WARN_ON(iosys_map_is_null(&primary_composer->map[0])))
>   		return;
>   
>   	vaddr = plane_composer->map[0].vaddr;
> @@ -187,7 +187,7 @@ static int compose_active_planes(void **vaddr_out,
>   		}
>   	}
>   
> -	if (WARN_ON(dma_buf_map_is_null(&primary_composer->map[0])))
> +	if (WARN_ON(iosys_map_is_null(&primary_composer->map[0])))
>   		return -EINVAL;
>   
>   	vaddr = primary_composer->map[0].vaddr;
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
> index 9496fdc900b8..91e63b12f60f 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.h
> +++ b/drivers/gpu/drm/vkms/vkms_drv.h
> @@ -23,14 +23,14 @@
>   #define NUM_OVERLAY_PLANES 8
>   
>   struct vkms_writeback_job {
> -	struct dma_buf_map map[DRM_FORMAT_MAX_PLANES];
> -	struct dma_buf_map data[DRM_FORMAT_MAX_PLANES];
> +	struct iosys_map map[DRM_FORMAT_MAX_PLANES];
> +	struct iosys_map data[DRM_FORMAT_MAX_PLANES];
>   };
>   
>   struct vkms_composer {
>   	struct drm_framebuffer fb;
>   	struct drm_rect src, dst;
> -	struct dma_buf_map map[4];
> +	struct iosys_map map[4];
>   	unsigned int offset;
>   	unsigned int pitch;
>   	unsigned int cpp;
> diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
> index 32409e15244b..d8eb674b49a6 100644
> --- a/drivers/gpu/drm/vkms/vkms_plane.c
> +++ b/drivers/gpu/drm/vkms/vkms_plane.c
> @@ -1,6 +1,6 @@
>   // SPDX-License-Identifier: GPL-2.0+
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   
>   #include <drm/drm_atomic.h>
>   #include <drm/drm_atomic_helper.h>
> diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c
> index 8694227f555f..af1604dfbbaf 100644
> --- a/drivers/gpu/drm/vkms/vkms_writeback.c
> +++ b/drivers/gpu/drm/vkms/vkms_writeback.c
> @@ -1,6 +1,6 @@
>   // SPDX-License-Identifier: GPL-2.0+
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   
>   #include <drm/drm_atomic.h>
>   #include <drm/drm_fourcc.h>
> diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.c b/drivers/gpu/drm/xen/xen_drm_front_gem.c
> index dd358ba2bf8e..5a5bf4e5b717 100644
> --- a/drivers/gpu/drm/xen/xen_drm_front_gem.c
> +++ b/drivers/gpu/drm/xen/xen_drm_front_gem.c
> @@ -280,7 +280,8 @@ xen_drm_front_gem_import_sg_table(struct drm_device *dev,
>   	return &xen_obj->base;
>   }
>   
> -int xen_drm_front_gem_prime_vmap(struct drm_gem_object *gem_obj, struct dma_buf_map *map)
> +int xen_drm_front_gem_prime_vmap(struct drm_gem_object *gem_obj,
> +				 struct iosys_map *map)
>   {
>   	struct xen_gem_object *xen_obj = to_xen_gem_obj(gem_obj);
>   	void *vaddr;
> @@ -293,13 +294,13 @@ int xen_drm_front_gem_prime_vmap(struct drm_gem_object *gem_obj, struct dma_buf_
>   		     VM_MAP, PAGE_KERNEL);
>   	if (!vaddr)
>   		return -ENOMEM;
> -	dma_buf_map_set_vaddr(map, vaddr);
> +	iosys_map_set_vaddr(map, vaddr);
>   
>   	return 0;
>   }
>   
>   void xen_drm_front_gem_prime_vunmap(struct drm_gem_object *gem_obj,
> -				    struct dma_buf_map *map)
> +				    struct iosys_map *map)
>   {
>   	vunmap(map->vaddr);
>   }
> diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.h b/drivers/gpu/drm/xen/xen_drm_front_gem.h
> index eaea470f7001..a718a1f382a3 100644
> --- a/drivers/gpu/drm/xen/xen_drm_front_gem.h
> +++ b/drivers/gpu/drm/xen/xen_drm_front_gem.h
> @@ -12,7 +12,7 @@
>   #define __XEN_DRM_FRONT_GEM_H
>   
>   struct dma_buf_attachment;
> -struct dma_buf_map;
> +struct iosys_map;
>   struct drm_device;
>   struct drm_gem_object;
>   struct sg_table;
> @@ -32,9 +32,9 @@ struct page **xen_drm_front_gem_get_pages(struct drm_gem_object *obj);
>   void xen_drm_front_gem_free_object_unlocked(struct drm_gem_object *gem_obj);
>   
>   int xen_drm_front_gem_prime_vmap(struct drm_gem_object *gem_obj,
> -				 struct dma_buf_map *map);
> +				 struct iosys_map *map);
>   
>   void xen_drm_front_gem_prime_vunmap(struct drm_gem_object *gem_obj,
> -				    struct dma_buf_map *map);
> +				    struct iosys_map *map);
>   
>   #endif /* __XEN_DRM_FRONT_GEM_H */
> diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
> index 556e42ba66e5..f274f48aefeb 100644
> --- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c
> +++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
> @@ -99,7 +99,7 @@ static void *vb2_dc_vaddr(struct vb2_buffer *vb, void *buf_priv)
>   		return buf->vaddr;
>   
>   	if (buf->db_attach) {
> -		struct dma_buf_map map;
> +		struct iosys_map map;
>   
>   		if (!dma_buf_vmap(buf->db_attach->dmabuf, &map))
>   			buf->vaddr = map.vaddr;
> @@ -446,7 +446,7 @@ vb2_dc_dmabuf_ops_end_cpu_access(struct dma_buf *dbuf,
>   	return 0;
>   }
>   
> -static int vb2_dc_dmabuf_ops_vmap(struct dma_buf *dbuf, struct dma_buf_map *map)
> +static int vb2_dc_dmabuf_ops_vmap(struct dma_buf *dbuf, struct iosys_map *map)
>   {
>   	struct vb2_dc_buf *buf;
>   	void *vaddr;
> @@ -456,7 +456,7 @@ static int vb2_dc_dmabuf_ops_vmap(struct dma_buf *dbuf, struct dma_buf_map *map)
>   	if (!vaddr)
>   		return -EINVAL;
>   
> -	dma_buf_map_set_vaddr(map, vaddr);
> +	iosys_map_set_vaddr(map, vaddr);
>   
>   	return 0;
>   }
> @@ -737,7 +737,7 @@ static void vb2_dc_unmap_dmabuf(void *mem_priv)
>   {
>   	struct vb2_dc_buf *buf = mem_priv;
>   	struct sg_table *sgt = buf->dma_sgt;
> -	struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(buf->vaddr);
> +	struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);
>   
>   	if (WARN_ON(!buf->db_attach)) {
>   		pr_err("trying to unpin a not attached buffer\n");
> diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
> index 90acafd9a290..f8a21c560ad2 100644
> --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
> +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
> @@ -303,7 +303,7 @@ static void vb2_dma_sg_put_userptr(void *buf_priv)
>   static void *vb2_dma_sg_vaddr(struct vb2_buffer *vb, void *buf_priv)
>   {
>   	struct vb2_dma_sg_buf *buf = buf_priv;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	int ret;
>   
>   	BUG_ON(!buf);
> @@ -492,11 +492,12 @@ vb2_dma_sg_dmabuf_ops_end_cpu_access(struct dma_buf *dbuf,
>   	return 0;
>   }
>   
> -static int vb2_dma_sg_dmabuf_ops_vmap(struct dma_buf *dbuf, struct dma_buf_map *map)
> +static int vb2_dma_sg_dmabuf_ops_vmap(struct dma_buf *dbuf,
> +				      struct iosys_map *map)
>   {
>   	struct vb2_dma_sg_buf *buf = dbuf->priv;
>   
> -	dma_buf_map_set_vaddr(map, buf->vaddr);
> +	iosys_map_set_vaddr(map, buf->vaddr);
>   
>   	return 0;
>   }
> @@ -581,7 +582,7 @@ static void vb2_dma_sg_unmap_dmabuf(void *mem_priv)
>   {
>   	struct vb2_dma_sg_buf *buf = mem_priv;
>   	struct sg_table *sgt = buf->dma_sgt;
> -	struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(buf->vaddr);
> +	struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);
>   
>   	if (WARN_ON(!buf->db_attach)) {
>   		pr_err("trying to unpin a not attached buffer\n");
> diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
> index 0bbfea66554f..948152f1596b 100644
> --- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c
> +++ b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
> @@ -312,11 +312,12 @@ static void vb2_vmalloc_dmabuf_ops_release(struct dma_buf *dbuf)
>   	vb2_vmalloc_put(dbuf->priv);
>   }
>   
> -static int vb2_vmalloc_dmabuf_ops_vmap(struct dma_buf *dbuf, struct dma_buf_map *map)
> +static int vb2_vmalloc_dmabuf_ops_vmap(struct dma_buf *dbuf,
> +				       struct iosys_map *map)
>   {
>   	struct vb2_vmalloc_buf *buf = dbuf->priv;
>   
> -	dma_buf_map_set_vaddr(map, buf->vaddr);
> +	iosys_map_set_vaddr(map, buf->vaddr);
>   
>   	return 0;
>   }
> @@ -372,7 +373,7 @@ static struct dma_buf *vb2_vmalloc_get_dmabuf(struct vb2_buffer *vb,
>   static int vb2_vmalloc_map_dmabuf(void *mem_priv)
>   {
>   	struct vb2_vmalloc_buf *buf = mem_priv;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   	int ret;
>   
>   	ret = dma_buf_vmap(buf->dbuf, &map);
> @@ -386,7 +387,7 @@ static int vb2_vmalloc_map_dmabuf(void *mem_priv)
>   static void vb2_vmalloc_unmap_dmabuf(void *mem_priv)
>   {
>   	struct vb2_vmalloc_buf *buf = mem_priv;
> -	struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(buf->vaddr);
> +	struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);
>   
>   	dma_buf_vunmap(buf->dbuf, &map);
>   	buf->vaddr = NULL;
> @@ -395,7 +396,7 @@ static void vb2_vmalloc_unmap_dmabuf(void *mem_priv)
>   static void vb2_vmalloc_detach_dmabuf(void *mem_priv)
>   {
>   	struct vb2_vmalloc_buf *buf = mem_priv;
> -	struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(buf->vaddr);
> +	struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);
>   
>   	if (buf->vaddr)
>   		dma_buf_vunmap(buf->dbuf, &map);
> diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
> index 4ccbf43e6bfa..5c0503655212 100644
> --- a/drivers/misc/fastrpc.c
> +++ b/drivers/misc/fastrpc.c
> @@ -587,11 +587,11 @@ static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf,
>   	kfree(a);
>   }
>   
> -static int fastrpc_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
> +static int fastrpc_vmap(struct dma_buf *dmabuf, struct iosys_map *map)
>   {
>   	struct fastrpc_buf *buf = dmabuf->priv;
>   
> -	dma_buf_map_set_vaddr(map, buf->virt);
> +	iosys_map_set_vaddr(map, buf->virt);
>   
>   	return 0;
>   }
> diff --git a/include/drm/drm_cache.h b/include/drm/drm_cache.h
> index cc9de1632dd3..22deb216b59c 100644
> --- a/include/drm/drm_cache.h
> +++ b/include/drm/drm_cache.h
> @@ -35,7 +35,7 @@
>   
>   #include <linux/scatterlist.h>
>   
> -struct dma_buf_map;
> +struct iosys_map;
>   
>   void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
>   void drm_clflush_sg(struct sg_table *st);
> @@ -74,7 +74,7 @@ static inline bool drm_arch_can_wc_memory(void)
>   
>   void drm_memcpy_init_early(void);
>   
> -void drm_memcpy_from_wc(struct dma_buf_map *dst,
> -			const struct dma_buf_map *src,
> +void drm_memcpy_from_wc(struct iosys_map *dst,
> +			const struct iosys_map *src,
>   			unsigned long len);
>   #endif
> diff --git a/include/drm/drm_client.h b/include/drm/drm_client.h
> index f07f2fb02e75..4fc8018eddda 100644
> --- a/include/drm/drm_client.h
> +++ b/include/drm/drm_client.h
> @@ -3,7 +3,7 @@
>   #ifndef _DRM_CLIENT_H_
>   #define _DRM_CLIENT_H_
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/lockdep.h>
>   #include <linux/mutex.h>
>   #include <linux/types.h>
> @@ -144,7 +144,7 @@ struct drm_client_buffer {
>   	/**
>   	 * @map: Virtual address for the buffer
>   	 */
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   
>   	/**
>   	 * @fb: DRM framebuffer
> @@ -156,7 +156,8 @@ struct drm_client_buffer *
>   drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format);
>   void drm_client_framebuffer_delete(struct drm_client_buffer *buffer);
>   int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect);
> -int drm_client_buffer_vmap(struct drm_client_buffer *buffer, struct dma_buf_map *map);
> +int drm_client_buffer_vmap(struct drm_client_buffer *buffer,
> +			   struct iosys_map *map);
>   void drm_client_buffer_vunmap(struct drm_client_buffer *buffer);
>   
>   int drm_client_modeset_create(struct drm_client_dev *client);
> diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
> index 35e7f44c2a75..e2941cee14b6 100644
> --- a/include/drm/drm_gem.h
> +++ b/include/drm/drm_gem.h
> @@ -39,7 +39,7 @@
>   
>   #include <drm/drm_vma_manager.h>
>   
> -struct dma_buf_map;
> +struct iosys_map;
>   struct drm_gem_object;
>   
>   /**
> @@ -139,7 +139,7 @@ struct drm_gem_object_funcs {
>   	 *
>   	 * This callback is optional.
>   	 */
> -	int (*vmap)(struct drm_gem_object *obj, struct dma_buf_map *map);
> +	int (*vmap)(struct drm_gem_object *obj, struct iosys_map *map);
>   
>   	/**
>   	 * @vunmap:
> @@ -149,7 +149,7 @@ struct drm_gem_object_funcs {
>   	 *
>   	 * This callback is optional.
>   	 */
> -	void (*vunmap)(struct drm_gem_object *obj, struct dma_buf_map *map);
> +	void (*vunmap)(struct drm_gem_object *obj, struct iosys_map *map);
>   
>   	/**
>   	 * @mmap:
> diff --git a/include/drm/drm_gem_atomic_helper.h b/include/drm/drm_gem_atomic_helper.h
> index 0b1e2dd2ac3f..6e3319e9001a 100644
> --- a/include/drm/drm_gem_atomic_helper.h
> +++ b/include/drm/drm_gem_atomic_helper.h
> @@ -3,7 +3,7 @@
>   #ifndef __DRM_GEM_ATOMIC_HELPER_H__
>   #define __DRM_GEM_ATOMIC_HELPER_H__
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   
>   #include <drm/drm_fourcc.h>
>   #include <drm/drm_plane.h>
> @@ -59,7 +59,7 @@ struct drm_shadow_plane_state {
>   	 * The memory mappings stored in map should be established in the plane's
>   	 * prepare_fb callback and removed in the cleanup_fb callback.
>   	 */
> -	struct dma_buf_map map[DRM_FORMAT_MAX_PLANES];
> +	struct iosys_map map[DRM_FORMAT_MAX_PLANES];
>   
>   	/**
>   	 * @data: Address of each framebuffer BO's data
> @@ -67,7 +67,7 @@ struct drm_shadow_plane_state {
>   	 * The address of the data stored in each mapping. This is different
>   	 * for framebuffers with non-zero offset fields.
>   	 */
> -	struct dma_buf_map data[DRM_FORMAT_MAX_PLANES];
> +	struct iosys_map data[DRM_FORMAT_MAX_PLANES];
>   };
>   
>   /**
> diff --git a/include/drm/drm_gem_cma_helper.h b/include/drm/drm_gem_cma_helper.h
> index adb507a9dbf0..fbda4ce5d5fb 100644
> --- a/include/drm/drm_gem_cma_helper.h
> +++ b/include/drm/drm_gem_cma_helper.h
> @@ -38,7 +38,8 @@ void drm_gem_cma_free(struct drm_gem_cma_object *cma_obj);
>   void drm_gem_cma_print_info(const struct drm_gem_cma_object *cma_obj,
>   			    struct drm_printer *p, unsigned int indent);
>   struct sg_table *drm_gem_cma_get_sg_table(struct drm_gem_cma_object *cma_obj);
> -int drm_gem_cma_vmap(struct drm_gem_cma_object *cma_obj, struct dma_buf_map *map);
> +int drm_gem_cma_vmap(struct drm_gem_cma_object *cma_obj,
> +		     struct iosys_map *map);
>   int drm_gem_cma_mmap(struct drm_gem_cma_object *cma_obj, struct vm_area_struct *vma);
>   
>   extern const struct vm_operations_struct drm_gem_cma_vm_ops;
> @@ -106,7 +107,8 @@ static inline struct sg_table *drm_gem_cma_object_get_sg_table(struct drm_gem_ob
>    * Returns:
>    * 0 on success or a negative error code on failure.
>    */
> -static inline int drm_gem_cma_object_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +static inline int drm_gem_cma_object_vmap(struct drm_gem_object *obj,
> +					  struct iosys_map *map)
>   {
>   	struct drm_gem_cma_object *cma_obj = to_drm_gem_cma_obj(obj);
>   
> diff --git a/include/drm/drm_gem_framebuffer_helper.h b/include/drm/drm_gem_framebuffer_helper.h
> index 905727719ead..1091e4fa08cb 100644
> --- a/include/drm/drm_gem_framebuffer_helper.h
> +++ b/include/drm/drm_gem_framebuffer_helper.h
> @@ -2,7 +2,7 @@
>   #define __DRM_GEM_FB_HELPER_H__
>   
>   #include <linux/dma-buf.h>
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   
>   #include <drm/drm_fourcc.h>
>   
> @@ -40,10 +40,10 @@ drm_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file,
>   			     const struct drm_mode_fb_cmd2 *mode_cmd);
>   
>   int drm_gem_fb_vmap(struct drm_framebuffer *fb,
> -		    struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES],
> -		    struct dma_buf_map data[DRM_FORMAT_MAX_PLANES]);
> +		    struct iosys_map map[static DRM_FORMAT_MAX_PLANES],
> +		    struct iosys_map data[DRM_FORMAT_MAX_PLANES]);
>   void drm_gem_fb_vunmap(struct drm_framebuffer *fb,
> -		       struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES]);
> +		       struct iosys_map map[static DRM_FORMAT_MAX_PLANES]);
>   int drm_gem_fb_begin_cpu_access(struct drm_framebuffer *fb, enum dma_data_direction dir);
>   void drm_gem_fb_end_cpu_access(struct drm_framebuffer *fb, enum dma_data_direction dir);
>   
> diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h
> index 311d66c9cf4b..68347b63fc71 100644
> --- a/include/drm/drm_gem_shmem_helper.h
> +++ b/include/drm/drm_gem_shmem_helper.h
> @@ -113,8 +113,10 @@ int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem);
>   void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem);
>   int drm_gem_shmem_pin(struct drm_gem_shmem_object *shmem);
>   void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem);
> -int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem, struct dma_buf_map *map);
> -void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem, struct dma_buf_map *map);
> +int drm_gem_shmem_vmap(struct drm_gem_shmem_object *shmem,
> +		       struct iosys_map *map);
> +void drm_gem_shmem_vunmap(struct drm_gem_shmem_object *shmem,
> +			  struct iosys_map *map);
>   int drm_gem_shmem_mmap(struct drm_gem_shmem_object *shmem, struct vm_area_struct *vma);
>   
>   int drm_gem_shmem_madvise(struct drm_gem_shmem_object *shmem, int madv);
> @@ -226,7 +228,8 @@ static inline struct sg_table *drm_gem_shmem_object_get_sg_table(struct drm_gem_
>    * Returns:
>    * 0 on success or a negative error code on failure.
>    */
> -static inline int drm_gem_shmem_object_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +static inline int drm_gem_shmem_object_vmap(struct drm_gem_object *obj,
> +					    struct iosys_map *map)
>   {
>   	struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
>   
> @@ -241,7 +244,8 @@ static inline int drm_gem_shmem_object_vmap(struct drm_gem_object *obj, struct d
>    * This function wraps drm_gem_shmem_vunmap(). Drivers that employ the shmem helpers should
>    * use it as their &drm_gem_object_funcs.vunmap handler.
>    */
> -static inline void drm_gem_shmem_object_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map)
> +static inline void drm_gem_shmem_object_vunmap(struct drm_gem_object *obj,
> +					       struct iosys_map *map)
>   {
>   	struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
>   
> diff --git a/include/drm/drm_gem_ttm_helper.h b/include/drm/drm_gem_ttm_helper.h
> index 78040f6cc6f3..4c003b4f173e 100644
> --- a/include/drm/drm_gem_ttm_helper.h
> +++ b/include/drm/drm_gem_ttm_helper.h
> @@ -10,7 +10,7 @@
>   #include <drm/ttm/ttm_bo_api.h>
>   #include <drm/ttm/ttm_bo_driver.h>
>   
> -struct dma_buf_map;
> +struct iosys_map;
>   
>   #define drm_gem_ttm_of_gem(gem_obj) \
>   	container_of(gem_obj, struct ttm_buffer_object, base)
> @@ -18,9 +18,9 @@ struct dma_buf_map;
>   void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
>   			    const struct drm_gem_object *gem);
>   int drm_gem_ttm_vmap(struct drm_gem_object *gem,
> -		     struct dma_buf_map *map);
> +		     struct iosys_map *map);
>   void drm_gem_ttm_vunmap(struct drm_gem_object *gem,
> -			struct dma_buf_map *map);
> +			struct iosys_map *map);
>   int drm_gem_ttm_mmap(struct drm_gem_object *gem,
>   		     struct vm_area_struct *vma);
>   
> diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h
> index b4ce27a72773..c083a1d71cf4 100644
> --- a/include/drm/drm_gem_vram_helper.h
> +++ b/include/drm/drm_gem_vram_helper.h
> @@ -12,7 +12,7 @@
>   #include <drm/ttm/ttm_bo_driver.h>
>   
>   #include <linux/container_of.h>
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   
>   struct drm_mode_create_dumb;
>   struct drm_plane;
> @@ -51,7 +51,7 @@ struct vm_area_struct;
>    */
>   struct drm_gem_vram_object {
>   	struct ttm_buffer_object bo;
> -	struct dma_buf_map map;
> +	struct iosys_map map;
>   
>   	/**
>   	 * @vmap_use_count:
> @@ -97,8 +97,9 @@ void drm_gem_vram_put(struct drm_gem_vram_object *gbo);
>   s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo);
>   int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag);
>   int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo);
> -int drm_gem_vram_vmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map);
> -void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map);
> +int drm_gem_vram_vmap(struct drm_gem_vram_object *gbo, struct iosys_map *map);
> +void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo,
> +			 struct iosys_map *map);
>   
>   int drm_gem_vram_fill_create_dumb(struct drm_file *file,
>   				  struct drm_device *dev,
> diff --git a/include/drm/drm_prime.h b/include/drm/drm_prime.h
> index 54f2c58305d2..2a1d01e5b56b 100644
> --- a/include/drm/drm_prime.h
> +++ b/include/drm/drm_prime.h
> @@ -54,7 +54,7 @@ struct device;
>   struct dma_buf_export_info;
>   struct dma_buf;
>   struct dma_buf_attachment;
> -struct dma_buf_map;
> +struct iosys_map;
>   
>   enum dma_data_direction;
>   
> @@ -83,8 +83,8 @@ struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
>   void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
>   			   struct sg_table *sgt,
>   			   enum dma_data_direction dir);
> -int drm_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct dma_buf_map *map);
> -void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct dma_buf_map *map);
> +int drm_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct iosys_map *map);
> +void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct iosys_map *map);
>   
>   int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
>   int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma);
> diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
> index c17b2df9178b..155b19ee12fb 100644
> --- a/include/drm/ttm/ttm_bo_api.h
> +++ b/include/drm/ttm/ttm_bo_api.h
> @@ -47,7 +47,7 @@ struct ttm_global;
>   
>   struct ttm_device;
>   
> -struct dma_buf_map;
> +struct iosys_map;
>   
>   struct drm_mm_node;
>   
> @@ -481,17 +481,17 @@ void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map);
>    * ttm_bo_vmap
>    *
>    * @bo: The buffer object.
> - * @map: pointer to a struct dma_buf_map representing the map.
> + * @map: pointer to a struct iosys_map representing the map.
>    *
>    * Sets up a kernel virtual mapping, using ioremap or vmap to the
>    * data in the buffer object. The parameter @map returns the virtual
> - * address as struct dma_buf_map. Unmap the buffer with ttm_bo_vunmap().
> + * address as struct iosys_map. Unmap the buffer with ttm_bo_vunmap().
>    *
>    * Returns
>    * -ENOMEM: Out of memory.
>    * -EINVAL: Invalid range.
>    */
> -int ttm_bo_vmap(struct ttm_buffer_object *bo, struct dma_buf_map *map);
> +int ttm_bo_vmap(struct ttm_buffer_object *bo, struct iosys_map *map);
>   
>   /**
>    * ttm_bo_vunmap
> @@ -501,7 +501,7 @@ int ttm_bo_vmap(struct ttm_buffer_object *bo, struct dma_buf_map *map);
>    *
>    * Unmaps a kernel map set up by ttm_bo_vmap().
>    */
> -void ttm_bo_vunmap(struct ttm_buffer_object *bo, struct dma_buf_map *map);
> +void ttm_bo_vunmap(struct ttm_buffer_object *bo, struct iosys_map *map);
>   
>   /**
>    * ttm_bo_mmap_obj - mmap memory backed by a ttm buffer object.
> diff --git a/include/drm/ttm/ttm_kmap_iter.h b/include/drm/ttm/ttm_kmap_iter.h
> index 8bb00fd39d6c..cc5c09a211b4 100644
> --- a/include/drm/ttm/ttm_kmap_iter.h
> +++ b/include/drm/ttm/ttm_kmap_iter.h
> @@ -8,7 +8,7 @@
>   #include <linux/types.h>
>   
>   struct ttm_kmap_iter;
> -struct dma_buf_map;
> +struct iosys_map;
>   
>   /**
>    * struct ttm_kmap_iter_ops - Ops structure for a struct
> @@ -24,22 +24,22 @@ struct ttm_kmap_iter_ops {
>   	 * kmap_local semantics.
>   	 * @res_iter: Pointer to the struct ttm_kmap_iter representing
>   	 * the resource.
> -	 * @dmap: The struct dma_buf_map holding the virtual address after
> +	 * @dmap: The struct iosys_map holding the virtual address after
>   	 * the operation.
>   	 * @i: The location within the resource to map. PAGE_SIZE granularity.
>   	 */
>   	void (*map_local)(struct ttm_kmap_iter *res_iter,
> -			  struct dma_buf_map *dmap, pgoff_t i);
> +			  struct iosys_map *dmap, pgoff_t i);
>   	/**
>   	 * unmap_local() - Unmap a PAGE_SIZE part of the resource previously
>   	 * mapped using kmap_local.
>   	 * @res_iter: Pointer to the struct ttm_kmap_iter representing
>   	 * the resource.
> -	 * @dmap: The struct dma_buf_map holding the virtual address after
> +	 * @dmap: The struct iosys_map holding the virtual address after
>   	 * the operation.
>   	 */
>   	void (*unmap_local)(struct ttm_kmap_iter *res_iter,
> -			    struct dma_buf_map *dmap);
> +			    struct iosys_map *dmap);
>   	bool maps_tt;
>   };
>   
> diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h
> index 69eea9d6399b..4fd727b52da1 100644
> --- a/include/drm/ttm/ttm_resource.h
> +++ b/include/drm/ttm/ttm_resource.h
> @@ -27,7 +27,7 @@
>   
>   #include <linux/types.h>
>   #include <linux/mutex.h>
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/dma-fence.h>
>   #include <drm/drm_print.h>
>   #include <drm/ttm/ttm_caching.h>
> @@ -41,7 +41,7 @@ struct ttm_resource;
>   struct ttm_place;
>   struct ttm_buffer_object;
>   struct ttm_placement;
> -struct dma_buf_map;
> +struct iosys_map;
>   struct io_mapping;
>   struct sg_table;
>   struct scatterlist;
> @@ -210,7 +210,7 @@ struct ttm_kmap_iter_iomap {
>    */
>   struct ttm_kmap_iter_linear_io {
>   	struct ttm_kmap_iter base;
> -	struct dma_buf_map dmap;
> +	struct iosys_map dmap;
>   	bool needs_unmap;
>   };
>   
> diff --git a/include/linux/dma-buf-map.h b/include/linux/dma-buf-map.h
> deleted file mode 100644
> index 19fa0b5ae5ec..000000000000
> --- a/include/linux/dma-buf-map.h
> +++ /dev/null
> @@ -1,266 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0-only */
> -/*
> - * Pointer to dma-buf-mapped memory, plus helpers.
> - */
> -
> -#ifndef __DMA_BUF_MAP_H__
> -#define __DMA_BUF_MAP_H__
> -
> -#include <linux/io.h>
> -#include <linux/string.h>
> -
> -/**
> - * DOC: overview
> - *
> - * Calling dma-buf's vmap operation returns a pointer to the buffer's memory.
> - * Depending on the location of the buffer, users may have to access it with
> - * I/O operations or memory load/store operations. For example, copying to
> - * system memory could be done with memcpy(), copying to I/O memory would be
> - * done with memcpy_toio().
> - *
> - * .. code-block:: c
> - *
> - *	void *vaddr = ...; // pointer to system memory
> - *	memcpy(vaddr, src, len);
> - *
> - *	void *vaddr_iomem = ...; // pointer to I/O memory
> - *	memcpy_toio(vaddr, _iomem, src, len);
> - *
> - * When using dma-buf's vmap operation, the returned pointer is encoded as
> - * :c:type:`struct dma_buf_map <dma_buf_map>`.
> - * :c:type:`struct dma_buf_map <dma_buf_map>` stores the buffer's address in
> - * system or I/O memory and a flag that signals the required method of
> - * accessing the buffer. Use the returned instance and the helper functions
> - * to access the buffer's memory in the correct way.
> - *
> - * The type :c:type:`struct dma_buf_map <dma_buf_map>` and its helpers are
> - * actually independent from the dma-buf infrastructure. When sharing buffers
> - * among devices, drivers have to know the location of the memory to access
> - * the buffers in a safe way. :c:type:`struct dma_buf_map <dma_buf_map>`
> - * solves this problem for dma-buf and its users. If other drivers or
> - * sub-systems require similar functionality, the type could be generalized
> - * and moved to a more prominent header file.
> - *
> - * Open-coding access to :c:type:`struct dma_buf_map <dma_buf_map>` is
> - * considered bad style. Rather then accessing its fields directly, use one
> - * of the provided helper functions, or implement your own. For example,
> - * instances of :c:type:`struct dma_buf_map <dma_buf_map>` can be initialized
> - * statically with DMA_BUF_MAP_INIT_VADDR(), or at runtime with
> - * dma_buf_map_set_vaddr(). These helpers will set an address in system memory.
> - *
> - * .. code-block:: c
> - *
> - *	struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(0xdeadbeaf);
> - *
> - *	dma_buf_map_set_vaddr(&map, 0xdeadbeaf);
> - *
> - * To set an address in I/O memory, use dma_buf_map_set_vaddr_iomem().
> - *
> - * .. code-block:: c
> - *
> - *	dma_buf_map_set_vaddr_iomem(&map, 0xdeadbeaf);
> - *
> - * Instances of struct dma_buf_map do not have to be cleaned up, but
> - * can be cleared to NULL with dma_buf_map_clear(). Cleared mappings
> - * always refer to system memory.
> - *
> - * .. code-block:: c
> - *
> - *	dma_buf_map_clear(&map);
> - *
> - * Test if a mapping is valid with either dma_buf_map_is_set() or
> - * dma_buf_map_is_null().
> - *
> - * .. code-block:: c
> - *
> - *	if (dma_buf_map_is_set(&map) != dma_buf_map_is_null(&map))
> - *		// always true
> - *
> - * Instances of :c:type:`struct dma_buf_map <dma_buf_map>` can be compared
> - * for equality with dma_buf_map_is_equal(). Mappings the point to different
> - * memory spaces, system or I/O, are never equal. That's even true if both
> - * spaces are located in the same address space, both mappings contain the
> - * same address value, or both mappings refer to NULL.
> - *
> - * .. code-block:: c
> - *
> - *	struct dma_buf_map sys_map; // refers to system memory
> - *	struct dma_buf_map io_map; // refers to I/O memory
> - *
> - *	if (dma_buf_map_is_equal(&sys_map, &io_map))
> - *		// always false
> - *
> - * A set up instance of struct dma_buf_map can be used to access or manipulate
> - * the buffer memory. Depending on the location of the memory, the provided
> - * helpers will pick the correct operations. Data can be copied into the memory
> - * with dma_buf_map_memcpy_to(). The address can be manipulated with
> - * dma_buf_map_incr().
> - *
> - * .. code-block:: c
> - *
> - *	const void *src = ...; // source buffer
> - *	size_t len = ...; // length of src
> - *
> - *	dma_buf_map_memcpy_to(&map, src, len);
> - *	dma_buf_map_incr(&map, len); // go to first byte after the memcpy
> - */
> -
> -/**
> - * struct dma_buf_map - Pointer to vmap'ed dma-buf memory.
> - * @vaddr_iomem:	The buffer's address if in I/O memory
> - * @vaddr:		The buffer's address if in system memory
> - * @is_iomem:		True if the dma-buf memory is located in I/O
> - *			memory, or false otherwise.
> - */
> -struct dma_buf_map {
> -	union {
> -		void __iomem *vaddr_iomem;
> -		void *vaddr;
> -	};
> -	bool is_iomem;
> -};
> -
> -/**
> - * DMA_BUF_MAP_INIT_VADDR - Initializes struct dma_buf_map to an address in system memory
> - * @vaddr_:	A system-memory address
> - */
> -#define DMA_BUF_MAP_INIT_VADDR(vaddr_) \
> -	{ \
> -		.vaddr = (vaddr_), \
> -		.is_iomem = false, \
> -	}
> -
> -/**
> - * dma_buf_map_set_vaddr - Sets a dma-buf mapping structure to an address in system memory
> - * @map:	The dma-buf mapping structure
> - * @vaddr:	A system-memory address
> - *
> - * Sets the address and clears the I/O-memory flag.
> - */
> -static inline void dma_buf_map_set_vaddr(struct dma_buf_map *map, void *vaddr)
> -{
> -	map->vaddr = vaddr;
> -	map->is_iomem = false;
> -}
> -
> -/**
> - * dma_buf_map_set_vaddr_iomem - Sets a dma-buf mapping structure to an address in I/O memory
> - * @map:		The dma-buf mapping structure
> - * @vaddr_iomem:	An I/O-memory address
> - *
> - * Sets the address and the I/O-memory flag.
> - */
> -static inline void dma_buf_map_set_vaddr_iomem(struct dma_buf_map *map,
> -					       void __iomem *vaddr_iomem)
> -{
> -	map->vaddr_iomem = vaddr_iomem;
> -	map->is_iomem = true;
> -}
> -
> -/**
> - * dma_buf_map_is_equal - Compares two dma-buf mapping structures for equality
> - * @lhs:	The dma-buf mapping structure
> - * @rhs:	A dma-buf mapping structure to compare with
> - *
> - * Two dma-buf mapping structures are equal if they both refer to the same type of memory
> - * and to the same address within that memory.
> - *
> - * Returns:
> - * True is both structures are equal, or false otherwise.
> - */
> -static inline bool dma_buf_map_is_equal(const struct dma_buf_map *lhs,
> -					const struct dma_buf_map *rhs)
> -{
> -	if (lhs->is_iomem != rhs->is_iomem)
> -		return false;
> -	else if (lhs->is_iomem)
> -		return lhs->vaddr_iomem == rhs->vaddr_iomem;
> -	else
> -		return lhs->vaddr == rhs->vaddr;
> -}
> -
> -/**
> - * dma_buf_map_is_null - Tests for a dma-buf mapping to be NULL
> - * @map:	The dma-buf mapping structure
> - *
> - * Depending on the state of struct dma_buf_map.is_iomem, tests if the
> - * mapping is NULL.
> - *
> - * Returns:
> - * True if the mapping is NULL, or false otherwise.
> - */
> -static inline bool dma_buf_map_is_null(const struct dma_buf_map *map)
> -{
> -	if (map->is_iomem)
> -		return !map->vaddr_iomem;
> -	return !map->vaddr;
> -}
> -
> -/**
> - * dma_buf_map_is_set - Tests is the dma-buf mapping has been set
> - * @map:	The dma-buf mapping structure
> - *
> - * Depending on the state of struct dma_buf_map.is_iomem, tests if the
> - * mapping has been set.
> - *
> - * Returns:
> - * True if the mapping is been set, or false otherwise.
> - */
> -static inline bool dma_buf_map_is_set(const struct dma_buf_map *map)
> -{
> -	return !dma_buf_map_is_null(map);
> -}
> -
> -/**
> - * dma_buf_map_clear - Clears a dma-buf mapping structure
> - * @map:	The dma-buf mapping structure
> - *
> - * Clears all fields to zero; including struct dma_buf_map.is_iomem. So
> - * mapping structures that were set to point to I/O memory are reset for
> - * system memory. Pointers are cleared to NULL. This is the default.
> - */
> -static inline void dma_buf_map_clear(struct dma_buf_map *map)
> -{
> -	if (map->is_iomem) {
> -		map->vaddr_iomem = NULL;
> -		map->is_iomem = false;
> -	} else {
> -		map->vaddr = NULL;
> -	}
> -}
> -
> -/**
> - * dma_buf_map_memcpy_to - Memcpy into dma-buf mapping
> - * @dst:	The dma-buf mapping structure
> - * @src:	The source buffer
> - * @len:	The number of byte in src
> - *
> - * Copies data into a dma-buf mapping. The source buffer is in system
> - * memory. Depending on the buffer's location, the helper picks the correct
> - * method of accessing the memory.
> - */
> -static inline void dma_buf_map_memcpy_to(struct dma_buf_map *dst, const void *src, size_t len)
> -{
> -	if (dst->is_iomem)
> -		memcpy_toio(dst->vaddr_iomem, src, len);
> -	else
> -		memcpy(dst->vaddr, src, len);
> -}
> -
> -/**
> - * dma_buf_map_incr - Increments the address stored in a dma-buf mapping
> - * @map:	The dma-buf mapping structure
> - * @incr:	The number of bytes to increment
> - *
> - * Increments the address stored in a dma-buf mapping. Depending on the
> - * buffer's location, the correct value will be updated.
> - */
> -static inline void dma_buf_map_incr(struct dma_buf_map *map, size_t incr)
> -{
> -	if (map->is_iomem)
> -		map->vaddr_iomem += incr;
> -	else
> -		map->vaddr += incr;
> -}
> -
> -#endif /* __DMA_BUF_MAP_H__ */
> diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
> index 7ab50076e7a6..2097760e8e95 100644
> --- a/include/linux/dma-buf.h
> +++ b/include/linux/dma-buf.h
> @@ -13,7 +13,7 @@
>   #ifndef __DMA_BUF_H__
>   #define __DMA_BUF_H__
>   
> -#include <linux/dma-buf-map.h>
> +#include <linux/iosys-map.h>
>   #include <linux/file.h>
>   #include <linux/err.h>
>   #include <linux/scatterlist.h>
> @@ -283,8 +283,8 @@ struct dma_buf_ops {
>   	 */
>   	int (*mmap)(struct dma_buf *, struct vm_area_struct *vma);
>   
> -	int (*vmap)(struct dma_buf *dmabuf, struct dma_buf_map *map);
> -	void (*vunmap)(struct dma_buf *dmabuf, struct dma_buf_map *map);
> +	int (*vmap)(struct dma_buf *dmabuf, struct iosys_map *map);
> +	void (*vunmap)(struct dma_buf *dmabuf, struct iosys_map *map);
>   };
>   
>   /**
> @@ -347,7 +347,7 @@ struct dma_buf {
>   	 * @vmap_ptr:
>   	 * The current vmap ptr if @vmapping_counter > 0. Protected by @lock.
>   	 */
> -	struct dma_buf_map vmap_ptr;
> +	struct iosys_map vmap_ptr;
>   
>   	/**
>   	 * @exp_name:
> @@ -628,6 +628,6 @@ int dma_buf_end_cpu_access(struct dma_buf *dma_buf,
>   
>   int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *,
>   		 unsigned long);
> -int dma_buf_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map);
> -void dma_buf_vunmap(struct dma_buf *dmabuf, struct dma_buf_map *map);
> +int dma_buf_vmap(struct dma_buf *dmabuf, struct iosys_map *map);
> +void dma_buf_vunmap(struct dma_buf *dmabuf, struct iosys_map *map);
>   #endif /* __DMA_BUF_H__ */
> diff --git a/include/linux/iosys-map.h b/include/linux/iosys-map.h
> new file mode 100644
> index 000000000000..46b13eab4454
> --- /dev/null
> +++ b/include/linux/iosys-map.h
> @@ -0,0 +1,257 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Pointer abstraction for IO/system memory
> + */
> +
> +#ifndef __IOSYS_MAP_H__
> +#define __IOSYS_MAP_H__
> +
> +#include <linux/io.h>
> +#include <linux/string.h>
> +
> +/**
> + * DOC: overview
> + *
> + * When accessing a memory region, depending on the its location, users may have
> + * to access it with I/O operations or memory load/store operations. For
> + * example, copying to system memory could be done with memcpy(), copying to I/O
> + * memory would be done with memcpy_toio().
> + *
> + * .. code-block:: c
> + *
> + *	void *vaddr = ...; // pointer to system memory
> + *	memcpy(vaddr, src, len);
> + *
> + *	void *vaddr_iomem = ...; // pointer to I/O memory
> + *	memcpy_toio(vaddr, _iomem, src, len);
> + *
> + * The user of such pointer may not have information about the mapping of that
> + * region or may want to have a single code path to handle operations on that
> + * buffer, regardless if it's located in system or IO memory. The type
> + * :c:type:`struct iosys_map <iosys_map>` and its helpers abstract that so the
> + * buffer can be passed around to other drivers or have separate duties inside
> + * the same driver for allocation, read and write operations.
> + *
> + * Open-coding access to :c:type:`struct iosys_map <iosys_map>` is considered
> + * bad style. Rather then accessing its fields directly, use one of the provided
> + * helper functions, or implement your own. For example, instances of
> + * :c:type:`struct iosys_map <iosys_map>` can be initialized statically with
> + * IOSYS_MAP_INIT_VADDR(), or at runtime with iosys_map_set_vaddr(). These
> + * helpers will set an address in system memory.
> + *
> + * .. code-block:: c
> + *
> + *	struct iosys_map map = IOSYS_MAP_INIT_VADDR(0xdeadbeaf);
> + *
> + *	iosys_map_set_vaddr(&map, 0xdeadbeaf);
> + *
> + * To set an address in I/O memory, use iosys_map_set_vaddr_iomem().
> + *
> + * .. code-block:: c
> + *
> + *	iosys_map_set_vaddr_iomem(&map, 0xdeadbeaf);
> + *
> + * Instances of struct iosys_map do not have to be cleaned up, but
> + * can be cleared to NULL with iosys_map_clear(). Cleared mappings
> + * always refer to system memory.
> + *
> + * .. code-block:: c
> + *
> + *	iosys_map_clear(&map);
> + *
> + * Test if a mapping is valid with either iosys_map_is_set() or
> + * iosys_map_is_null().
> + *
> + * .. code-block:: c
> + *
> + *	if (iosys_map_is_set(&map) != iosys_map_is_null(&map))
> + *		// always true
> + *
> + * Instances of :c:type:`struct iosys_map <iosys_map>` can be compared for
> + * equality with iosys_map_is_equal(). Mappings that point to different memory
> + * spaces, system or I/O, are never equal. That's even true if both spaces are
> + * located in the same address space, both mappings contain the same address
> + * value, or both mappings refer to NULL.
> + *
> + * .. code-block:: c
> + *
> + *	struct iosys_map sys_map; // refers to system memory
> + *	struct iosys_map io_map; // refers to I/O memory
> + *
> + *	if (iosys_map_is_equal(&sys_map, &io_map))
> + *		// always false
> + *
> + * A set up instance of struct iosys_map can be used to access or manipulate the
> + * buffer memory. Depending on the location of the memory, the provided helpers
> + * will pick the correct operations. Data can be copied into the memory with
> + * iosys_map_memcpy_to(). The address can be manipulated with iosys_map_incr().
> + *
> + * .. code-block:: c
> + *
> + *	const void *src = ...; // source buffer
> + *	size_t len = ...; // length of src
> + *
> + *	iosys_map_memcpy_to(&map, src, len);
> + *	iosys_map_incr(&map, len); // go to first byte after the memcpy
> + */
> +
> +/**
> + * struct iosys_map - Pointer to IO/system memory
> + * @vaddr_iomem:	The buffer's address if in I/O memory
> + * @vaddr:		The buffer's address if in system memory
> + * @is_iomem:		True if the buffer is located in I/O memory, or false
> + *			otherwise.
> + */
> +struct iosys_map {
> +	union {
> +		void __iomem *vaddr_iomem;
> +		void *vaddr;
> +	};
> +	bool is_iomem;
> +};
> +
> +/**
> + * IOSYS_MAP_INIT_VADDR - Initializes struct iosys_map to an address in system memory
> + * @vaddr_:	A system-memory address
> + */
> +#define IOSYS_MAP_INIT_VADDR(vaddr_)	\
> +	{				\
> +		.vaddr = (vaddr_),	\
> +		.is_iomem = false,	\
> +	}
> +
> +/**
> + * iosys_map_set_vaddr - Sets a iosys mapping structure to an address in system memory
> + * @map:	The iosys_map structure
> + * @vaddr:	A system-memory address
> + *
> + * Sets the address and clears the I/O-memory flag.
> + */
> +static inline void iosys_map_set_vaddr(struct iosys_map *map, void *vaddr)
> +{
> +	map->vaddr = vaddr;
> +	map->is_iomem = false;
> +}
> +
> +/**
> + * iosys_map_set_vaddr_iomem - Sets a iosys mapping structure to an address in I/O memory
> + * @map:		The iosys_map structure
> + * @vaddr_iomem:	An I/O-memory address
> + *
> + * Sets the address and the I/O-memory flag.
> + */
> +static inline void iosys_map_set_vaddr_iomem(struct iosys_map *map,
> +					     void __iomem *vaddr_iomem)
> +{
> +	map->vaddr_iomem = vaddr_iomem;
> +	map->is_iomem = true;
> +}
> +
> +/**
> + * iosys_map_is_equal - Compares two iosys mapping structures for equality
> + * @lhs:	The iosys_map structure
> + * @rhs:	A iosys_map structure to compare with
> + *
> + * Two iosys mapping structures are equal if they both refer to the same type of memory
> + * and to the same address within that memory.
> + *
> + * Returns:
> + * True is both structures are equal, or false otherwise.
> + */
> +static inline bool iosys_map_is_equal(const struct iosys_map *lhs,
> +				      const struct iosys_map *rhs)
> +{
> +	if (lhs->is_iomem != rhs->is_iomem)
> +		return false;
> +	else if (lhs->is_iomem)
> +		return lhs->vaddr_iomem == rhs->vaddr_iomem;
> +	else
> +		return lhs->vaddr == rhs->vaddr;
> +}
> +
> +/**
> + * iosys_map_is_null - Tests for a iosys mapping to be NULL
> + * @map:	The iosys_map structure
> + *
> + * Depending on the state of struct iosys_map.is_iomem, tests if the
> + * mapping is NULL.
> + *
> + * Returns:
> + * True if the mapping is NULL, or false otherwise.
> + */
> +static inline bool iosys_map_is_null(const struct iosys_map *map)
> +{
> +	if (map->is_iomem)
> +		return !map->vaddr_iomem;
> +	return !map->vaddr;
> +}
> +
> +/**
> + * iosys_map_is_set - Tests if the iosys mapping has been set
> + * @map:	The iosys_map structure
> + *
> + * Depending on the state of struct iosys_map.is_iomem, tests if the
> + * mapping has been set.
> + *
> + * Returns:
> + * True if the mapping is been set, or false otherwise.
> + */
> +static inline bool iosys_map_is_set(const struct iosys_map *map)
> +{
> +	return !iosys_map_is_null(map);
> +}
> +
> +/**
> + * iosys_map_clear - Clears a iosys mapping structure
> + * @map:	The iosys_map structure
> + *
> + * Clears all fields to zero, including struct iosys_map.is_iomem, so
> + * mapping structures that were set to point to I/O memory are reset for
> + * system memory. Pointers are cleared to NULL. This is the default.
> + */
> +static inline void iosys_map_clear(struct iosys_map *map)
> +{
> +	if (map->is_iomem) {
> +		map->vaddr_iomem = NULL;
> +		map->is_iomem = false;
> +	} else {
> +		map->vaddr = NULL;
> +	}
> +}
> +
> +/**
> + * iosys_map_memcpy_to - Memcpy into iosys mapping
> + * @dst:	The iosys_map structure
> + * @src:	The source buffer
> + * @len:	The number of byte in src
> + *
> + * Copies data into a iosys mapping. The source buffer is in system
> + * memory. Depending on the buffer's location, the helper picks the correct
> + * method of accessing the memory.
> + */
> +static inline void iosys_map_memcpy_to(struct iosys_map *dst, const void *src,
> +				       size_t len)
> +{
> +	if (dst->is_iomem)
> +		memcpy_toio(dst->vaddr_iomem, src, len);
> +	else
> +		memcpy(dst->vaddr, src, len);
> +}
> +
> +/**
> + * iosys_map_incr - Increments the address stored in a iosys mapping
> + * @map:	The iosys_map structure
> + * @incr:	The number of bytes to increment
> + *
> + * Increments the address stored in a iosys mapping. Depending on the
> + * buffer's location, the correct value will be updated.
> + */
> +static inline void iosys_map_incr(struct iosys_map *map, size_t incr)
> +{
> +	if (map->is_iomem)
> +		map->vaddr_iomem += incr;
> +	else
> +		map->vaddr += incr;
> +}
> +
> +#endif /* __IOSYS_MAP_H__ */

--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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