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Message-ID: <YgJsHIBUNpEXdNmV@phenom.ffwll.local>
Date: Tue, 8 Feb 2022 14:11:56 +0100
From: Daniel Vetter <daniel@...ll.ch>
To: Lucas De Marchi <lucas.demarchi@...el.com>
Cc: linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
intel-gfx@...ts.freedesktop.org, srinivas.kandagatla@...aro.org,
gregkh@...uxfoundation.org, sumit.semwal@...aro.org,
christian.koenig@....com, daniel.vetter@...ll.ch, airlied@...ux.ie,
lyude@...hat.com, tzimmermann@...e.de, linux-media@...r.kernel.org,
nouveau@...ts.freedesktop.org, Jonathan Corbet <corbet@....net>,
linux-doc@...r.kernel.org
Subject: Re: [PATCH v3] dma-buf-map: Rename to iosys-map
On Thu, Feb 03, 2022 at 12:56:14AM -0800, Lucas De Marchi wrote:
> Rename struct dma_buf_map to struct iosys_map and corresponding APIs.
> Over time dma-buf-map grew up to more functionality than the one used by
> dma-buf: in fact it's just a shim layer to abstract system memory, that
> can be accessed via regular load and store, from IO memory that needs to
> be acessed via arch helpers.
>
> The idea is to extend this API so it can fulfill other needs, internal
> to a single driver. Example: in the i915 driver it's desired to share
> the implementation for integrated graphics, which uses mostly system
> memory, with discrete graphics, which may need to access IO memory.
>
> The conversion was mostly done with the following semantic patch:
>
> @r1@
> @@
> - struct dma_buf_map
> + struct iosys_map
>
> @r2@
> @@
> (
> - DMA_BUF_MAP_INIT_VADDR
> + IOSYS_MAP_INIT_VADDR
> |
> - dma_buf_map_set_vaddr
> + iosys_map_set_vaddr
> |
> - dma_buf_map_set_vaddr_iomem
> + iosys_map_set_vaddr_iomem
> |
> - dma_buf_map_is_equal
> + iosys_map_is_equal
> |
> - dma_buf_map_is_null
> + iosys_map_is_null
> |
> - dma_buf_map_is_set
> + iosys_map_is_set
> |
> - dma_buf_map_clear
> + iosys_map_clear
> |
> - dma_buf_map_memcpy_to
> + iosys_map_memcpy_to
> |
> - dma_buf_map_incr
> + iosys_map_incr
> )
>
> @@
> @@
> - #include <linux/dma-buf-map.h>
> + #include <linux/iosys-map.h>
>
> Then some files had their includes adjusted and some comments were update to
> remove mentions to dma-buf-map.
>
> Since this is not specific to dma-buf anymore, move the documentation to
> the "Bus-Independent Device Accesses" section.
>
> v2:
> - Squash patches
>
> v3:
> - Fix wrong removal of dma-buf.h from MAINTAINERS
> - Move documentation from dma-buf.rst to device-io.rst
>
> Signed-off-by: Lucas De Marchi <lucas.demarchi@...el.com>
> Acked-by: Christian König <christian.koenig@....com>
> Acked-by: Sumit Semwal <sumit.semwal@...aro.org>
Acked-by: Daniel Vetter <daniel.vetter@...ll.ch>
> ---
> Documentation/driver-api/device-io.rst | 9 +
> Documentation/driver-api/dma-buf.rst | 9 -
> Documentation/gpu/todo.rst | 20 +-
> MAINTAINERS | 9 +-
> drivers/dma-buf/dma-buf.c | 22 +-
> drivers/dma-buf/heaps/cma_heap.c | 10 +-
> drivers/dma-buf/heaps/system_heap.c | 10 +-
> drivers/gpu/drm/ast/ast_drv.h | 2 +-
> drivers/gpu/drm/ast/ast_mode.c | 8 +-
> drivers/gpu/drm/drm_cache.c | 18 +-
> drivers/gpu/drm/drm_client.c | 9 +-
> drivers/gpu/drm/drm_fb_helper.c | 12 +-
> drivers/gpu/drm/drm_gem.c | 12 +-
> drivers/gpu/drm/drm_gem_cma_helper.c | 9 +-
> drivers/gpu/drm/drm_gem_framebuffer_helper.c | 16 +-
> drivers/gpu/drm/drm_gem_shmem_helper.c | 15 +-
> drivers/gpu/drm/drm_gem_ttm_helper.c | 4 +-
> drivers/gpu/drm/drm_gem_vram_helper.c | 25 +-
> drivers/gpu/drm/drm_internal.h | 6 +-
> drivers/gpu/drm/drm_mipi_dbi.c | 8 +-
> drivers/gpu/drm/drm_prime.c | 4 +-
> drivers/gpu/drm/etnaviv/etnaviv_drv.h | 2 +-
> drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 8 +-
> drivers/gpu/drm/gud/gud_pipe.c | 4 +-
> drivers/gpu/drm/hyperv/hyperv_drm_modeset.c | 5 +-
> drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 8 +-
> .../drm/i915/gem/selftests/i915_gem_dmabuf.c | 6 +-
> .../gpu/drm/i915/gem/selftests/mock_dmabuf.c | 6 +-
> drivers/gpu/drm/lima/lima_gem.c | 3 +-
> drivers/gpu/drm/lima/lima_sched.c | 4 +-
> drivers/gpu/drm/mediatek/mtk_drm_gem.c | 7 +-
> drivers/gpu/drm/mediatek/mtk_drm_gem.h | 5 +-
> drivers/gpu/drm/mgag200/mgag200_mode.c | 4 +-
> drivers/gpu/drm/msm/msm_drv.h | 4 +-
> drivers/gpu/drm/msm/msm_gem_prime.c | 6 +-
> drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 13 +-
> drivers/gpu/drm/qxl/qxl_display.c | 8 +-
> drivers/gpu/drm/qxl/qxl_draw.c | 6 +-
> drivers/gpu/drm/qxl/qxl_drv.h | 10 +-
> drivers/gpu/drm/qxl/qxl_object.c | 8 +-
> drivers/gpu/drm/qxl/qxl_object.h | 4 +-
> drivers/gpu/drm/qxl/qxl_prime.c | 4 +-
> drivers/gpu/drm/radeon/radeon_gem.c | 1 +
> drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 9 +-
> drivers/gpu/drm/rockchip/rockchip_drm_gem.h | 5 +-
> drivers/gpu/drm/tegra/gem.c | 10 +-
> drivers/gpu/drm/tiny/cirrus.c | 8 +-
> drivers/gpu/drm/tiny/gm12u320.c | 7 +-
> drivers/gpu/drm/ttm/ttm_bo_util.c | 16 +-
> drivers/gpu/drm/ttm/ttm_resource.c | 26 +-
> drivers/gpu/drm/ttm/ttm_tt.c | 6 +-
> drivers/gpu/drm/udl/udl_modeset.c | 3 +-
> drivers/gpu/drm/vboxvideo/vbox_mode.c | 4 +-
> drivers/gpu/drm/vkms/vkms_composer.c | 4 +-
> drivers/gpu/drm/vkms/vkms_drv.h | 6 +-
> drivers/gpu/drm/vkms/vkms_plane.c | 2 +-
> drivers/gpu/drm/vkms/vkms_writeback.c | 2 +-
> drivers/gpu/drm/xen/xen_drm_front_gem.c | 7 +-
> drivers/gpu/drm/xen/xen_drm_front_gem.h | 6 +-
> .../common/videobuf2/videobuf2-dma-contig.c | 8 +-
> .../media/common/videobuf2/videobuf2-dma-sg.c | 9 +-
> .../common/videobuf2/videobuf2-vmalloc.c | 11 +-
> drivers/misc/fastrpc.c | 4 +-
> include/drm/drm_cache.h | 6 +-
> include/drm/drm_client.h | 7 +-
> include/drm/drm_gem.h | 6 +-
> include/drm/drm_gem_atomic_helper.h | 6 +-
> include/drm/drm_gem_cma_helper.h | 6 +-
> include/drm/drm_gem_framebuffer_helper.h | 8 +-
> include/drm/drm_gem_shmem_helper.h | 12 +-
> include/drm/drm_gem_ttm_helper.h | 6 +-
> include/drm/drm_gem_vram_helper.h | 9 +-
> include/drm/drm_prime.h | 6 +-
> include/drm/ttm/ttm_bo_api.h | 10 +-
> include/drm/ttm/ttm_kmap_iter.h | 10 +-
> include/drm/ttm/ttm_resource.h | 6 +-
> include/linux/dma-buf-map.h | 266 ------------------
> include/linux/dma-buf.h | 12 +-
> include/linux/iosys-map.h | 257 +++++++++++++++++
> 79 files changed, 590 insertions(+), 559 deletions(-)
> delete mode 100644 include/linux/dma-buf-map.h
> create mode 100644 include/linux/iosys-map.h
>
> diff --git a/Documentation/driver-api/device-io.rst b/Documentation/driver-api/device-io.rst
> index e9f04b1815d1..f9dede8639c7 100644
> --- a/Documentation/driver-api/device-io.rst
> +++ b/Documentation/driver-api/device-io.rst
> @@ -502,6 +502,15 @@ pcim_iomap()
> Not using these wrappers may make drivers unusable on certain platforms with
> stricter rules for mapping I/O memory.
>
> +System/IO memory abstraction
> +----------------------------
> +
> +.. kernel-doc:: include/linux/iosys-map.h
> + :doc: overview
> +
> +.. kernel-doc:: include/linux/iosys-map.h
> + :internal:
> +
> Public Functions Provided
> =========================
>
> diff --git a/Documentation/driver-api/dma-buf.rst b/Documentation/driver-api/dma-buf.rst
> index 2cd7db82d9fe..55006678394a 100644
> --- a/Documentation/driver-api/dma-buf.rst
> +++ b/Documentation/driver-api/dma-buf.rst
> @@ -128,15 +128,6 @@ Kernel Functions and Structures Reference
> .. kernel-doc:: include/linux/dma-buf.h
> :internal:
>
> -Buffer Mapping Helpers
> -~~~~~~~~~~~~~~~~~~~~~~
> -
> -.. kernel-doc:: include/linux/dma-buf-map.h
> - :doc: overview
> -
> -.. kernel-doc:: include/linux/dma-buf-map.h
> - :internal:
> -
> 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@...e.de>, 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@...e.de>, Christian König, Daniel Vetter
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 0d914702950f..45c97e71c8c1 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -5675,7 +5675,7 @@ 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*
> +F: include/linux/dma-buf.h
> F: include/linux/dma-resv.h
> K: \bdma_(?:buf|fence|resv)\b
>
> @@ -9977,6 +9977,13 @@ F: include/linux/iova.h
> F: include/linux/of_iommu.h
> F: include/uapi/linux/iommu.h
>
> +IOSYS-MAP HELPERS
> +M: Thomas Zimmermann <tzimmermann@...e.de>
> +L: dri-devel@...ts.freedesktop.org
> +S: Maintained
> +T: git git://anongit.freedesktop.org/drm/drm-misc
> +F: include/linux/iosys-map.h
> +
> IO_URING
> M: Jens Axboe <axboe@...nel.dk>
> R: Pavel Begunkov <asml.silence@...il.com>
> 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 805c5a666490..709d1eb31899 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@...il.com> */
>
> #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@...il.com> */
>
> -#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@...ox.com>
> */
>
> -#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@...hat.com>
> */
>
> -#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..f4186f91caa6
> --- /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 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__ */
> --
> 2.35.1
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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