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dma-buf-map: Rename to iosys-map

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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

v4:
  - Change documentation title and level

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220204170541.829227-1-lucas.demarchi@intel.com
This commit is contained in:
Lucas De Marchi
2022-02-04 09:05:41 -08:00
parent 722b717d8e
commit 7938f42181
79 changed files with 601 additions and 570 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/drm/drm_gem.h
View File

@@ -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: