drm/gem: rename GEM CMA helpers to GEM DMA helpers

Rename "GEM CMA" helpers to "GEM DMA" helpers - considering the
hierarchy of APIs (mm/cma -> dma -> gem dma) calling them "GEM
DMA" seems to be more applicable.

Besides that, commit e57924d4ae80 ("drm/doc: Task to rename CMA helpers")
requests to rename the CMA helpers and implies that people seem to be
confused about the naming.

In order to do this renaming the following script was used:

```
	#!/bin/bash

	DIRS="drivers/gpu include/drm Documentation/gpu"

	REGEX_SYM_UPPER="[0-9A-Z_\-]"
	REGEX_SYM_LOWER="[0-9a-z_\-]"

	REGEX_GREP_UPPER="(${REGEX_SYM_UPPER}*)(GEM)_CMA_(${REGEX_SYM_UPPER}*)"
	REGEX_GREP_LOWER="(${REGEX_SYM_LOWER}*)(gem)_cma_(${REGEX_SYM_LOWER}*)"

	REGEX_SED_UPPER="s/${REGEX_GREP_UPPER}/\1\2_DMA_\3/g"
	REGEX_SED_LOWER="s/${REGEX_GREP_LOWER}/\1\2_dma_\3/g"

	# Find all upper case 'CMA' symbols and replace them with 'DMA'.
	for ff in $(grep -REHl "${REGEX_GREP_UPPER}" $DIRS)
	do
	       sed -i -E "$REGEX_SED_UPPER" $ff
	done

	# Find all lower case 'cma' symbols and replace them with 'dma'.
	for ff in $(grep -REHl "${REGEX_GREP_LOWER}" $DIRS)
	do
	       sed -i -E "$REGEX_SED_LOWER" $ff
	done

	# Replace all occurrences of 'CMA' / 'cma' in comments and
	# documentation files with 'DMA' / 'dma'.
	for ff in $(grep -RiHl " cma " $DIRS)
	do
		sed -i -E "s/ cma / dma /g" $ff
		sed -i -E "s/ CMA / DMA /g" $ff
	done

	# Rename all 'cma_obj's to 'dma_obj'.
	for ff in $(grep -RiHl "cma_obj" $DIRS)
	do
		sed -i -E "s/cma_obj/dma_obj/g" $ff
	done
```

Only a few more manual modifications were needed, e.g. reverting the
following modifications in some DRM Kconfig files

    -       select CMA if HAVE_DMA_CONTIGUOUS
    +       select DMA if HAVE_DMA_CONTIGUOUS

as well as manually picking the occurrences of 'CMA'/'cma' in comments and
documentation which relate to "GEM CMA", but not "FB CMA".

Also drivers/gpu/drm/Makefile was fixed up manually after renaming
drm_gem_cma_helper.c to drm_gem_dma_helper.c.

This patch is compile-time tested building a x86_64 kernel with
`make allyesconfig && make drivers/gpu/drm`.

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com> #drivers/gpu/drm/arm
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220802000405.949236-4-dakr@redhat.com

1 files changed, 13 insertions, 13 deletions

diff --git a/drivers/gpu/drm/vc4/vc4_render_cl.c b/drivers/gpu/drm/vc4/vc4_render_cl.c
index f6b7dc3df08c..c8a92023238c 100644
--- a/drivers/gpu/drm/vc4/vc4_render_cl.c
+++ b/drivers/gpu/drm/vc4/vc4_render_cl.c
@@ -40,14 +40,14 @@
 #include "vc4_packet.h"
 
 struct vc4_rcl_setup {
-	struct drm_gem_cma_object *color_read;
-	struct drm_gem_cma_object *color_write;
-	struct drm_gem_cma_object *zs_read;
-	struct drm_gem_cma_object *zs_write;
-	struct drm_gem_cma_object *msaa_color_write;
-	struct drm_gem_cma_object *msaa_zs_write;
-
-	struct drm_gem_cma_object *rcl;
+	struct drm_gem_dma_object *color_read;
+	struct drm_gem_dma_object *color_write;
+	struct drm_gem_dma_object *zs_read;
+	struct drm_gem_dma_object *zs_write;
+	struct drm_gem_dma_object *msaa_color_write;
+	struct drm_gem_dma_object *msaa_zs_write;
+
+	struct drm_gem_dma_object *rcl;
 	u32 next_offset;
 
 	u32 next_write_bo_index;
@@ -97,7 +97,7 @@ static void vc4_store_before_load(struct vc4_rcl_setup *setup)
  * coordinates packet, and instead just store to the address given.
  */
 static uint32_t vc4_full_res_offset(struct vc4_exec_info *exec,
-				    struct drm_gem_cma_object *bo,
+				    struct drm_gem_dma_object *bo,
 				    struct drm_vc4_submit_rcl_surface *surf,
 				    uint8_t x, uint8_t y)
 {
@@ -381,7 +381,7 @@ static int vc4_create_rcl_bo(struct drm_device *dev, struct vc4_exec_info *exec,
 }
 
 static int vc4_full_res_bounds_check(struct vc4_exec_info *exec,
-				     struct drm_gem_cma_object *obj,
+				     struct drm_gem_dma_object *obj,
 				     struct drm_vc4_submit_rcl_surface *surf)
 {
 	struct drm_vc4_submit_cl *args = exec->args;
@@ -407,7 +407,7 @@ static int vc4_full_res_bounds_check(struct vc4_exec_info *exec,
 }
 
 static int vc4_rcl_msaa_surface_setup(struct vc4_exec_info *exec,
-				      struct drm_gem_cma_object **obj,
+				      struct drm_gem_dma_object **obj,
 				      struct drm_vc4_submit_rcl_surface *surf)
 {
 	if (surf->flags != 0 || surf->bits != 0) {
@@ -433,7 +433,7 @@ static int vc4_rcl_msaa_surface_setup(struct vc4_exec_info *exec,
 }
 
 static int vc4_rcl_surface_setup(struct vc4_exec_info *exec,
-				 struct drm_gem_cma_object **obj,
+				 struct drm_gem_dma_object **obj,
 				 struct drm_vc4_submit_rcl_surface *surf,
 				 bool is_write)
 {
@@ -533,7 +533,7 @@ static int vc4_rcl_surface_setup(struct vc4_exec_info *exec,
 static int
 vc4_rcl_render_config_surface_setup(struct vc4_exec_info *exec,
 				    struct vc4_rcl_setup *setup,
-				    struct drm_gem_cma_object **obj,
+				    struct drm_gem_dma_object **obj,
 				    struct drm_vc4_submit_rcl_surface *surf)
 {
 	uint8_t tiling = VC4_GET_FIELD(surf->bits,