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, 8 insertions, 8 deletions

diff --git a/drivers/gpu/drm/vc4/vc4_validate.c b/drivers/gpu/drm/vc4/vc4_validate.c
index 2feba55bcef7..d5dc6b51ec69 100644
--- a/drivers/gpu/drm/vc4/vc4_validate.c
+++ b/drivers/gpu/drm/vc4/vc4_validate.c
@@ -102,11 +102,11 @@ size_is_lt(uint32_t width, uint32_t height, int cpp)
 		height <= 4 * utile_height(cpp));
 }
 
-struct drm_gem_cma_object *
+struct drm_gem_dma_object *
 vc4_use_bo(struct vc4_exec_info *exec, uint32_t hindex)
 {
 	struct vc4_dev *vc4 = exec->dev;
-	struct drm_gem_cma_object *obj;
+	struct drm_gem_dma_object *obj;
 	struct vc4_bo *bo;
 
 	if (WARN_ON_ONCE(vc4->is_vc5))
@@ -129,7 +129,7 @@ vc4_use_bo(struct vc4_exec_info *exec, uint32_t hindex)
 	return obj;
 }
 
-static struct drm_gem_cma_object *
+static struct drm_gem_dma_object *
 vc4_use_handle(struct vc4_exec_info *exec, uint32_t gem_handles_packet_index)
 {
 	return vc4_use_bo(exec, exec->bo_index[gem_handles_packet_index]);
@@ -160,7 +160,7 @@ gl_shader_rec_size(uint32_t pointer_bits)
 }
 
 bool
-vc4_check_tex_size(struct vc4_exec_info *exec, struct drm_gem_cma_object *fbo,
+vc4_check_tex_size(struct vc4_exec_info *exec, struct drm_gem_dma_object *fbo,
 		   uint32_t offset, uint8_t tiling_format,
 		   uint32_t width, uint32_t height, uint8_t cpp)
 {
@@ -263,7 +263,7 @@ validate_increment_semaphore(VALIDATE_ARGS)
 static int
 validate_indexed_prim_list(VALIDATE_ARGS)
 {
-	struct drm_gem_cma_object *ib;
+	struct drm_gem_dma_object *ib;
 	uint32_t length = *(uint32_t *)(untrusted + 1);
 	uint32_t offset = *(uint32_t *)(untrusted + 5);
 	uint32_t max_index = *(uint32_t *)(untrusted + 9);
@@ -575,7 +575,7 @@ reloc_tex(struct vc4_exec_info *exec,
 	  struct vc4_texture_sample_info *sample,
 	  uint32_t texture_handle_index, bool is_cs)
 {
-	struct drm_gem_cma_object *tex;
+	struct drm_gem_dma_object *tex;
 	uint32_t p0 = *(uint32_t *)(uniform_data_u + sample->p_offset[0]);
 	uint32_t p1 = *(uint32_t *)(uniform_data_u + sample->p_offset[1]);
 	uint32_t p2 = (sample->p_offset[2] != ~0 ?
@@ -765,7 +765,7 @@ validate_gl_shader_rec(struct drm_device *dev,
 		28, /* cs */
 	};
 	uint32_t shader_reloc_count = ARRAY_SIZE(shader_reloc_offsets);
-	struct drm_gem_cma_object *bo[ARRAY_SIZE(shader_reloc_offsets) + 8];
+	struct drm_gem_dma_object *bo[ARRAY_SIZE(shader_reloc_offsets) + 8];
 	uint32_t nr_attributes, nr_relocs, packet_size;
 	int i;
 
@@ -896,7 +896,7 @@ validate_gl_shader_rec(struct drm_device *dev,
 	}
 
 	for (i = 0; i < nr_attributes; i++) {
-		struct drm_gem_cma_object *vbo =
+		struct drm_gem_dma_object *vbo =
 			bo[ARRAY_SIZE(shader_reloc_offsets) + i];
 		uint32_t o = 36 + i * 8;
 		uint32_t offset = *(uint32_t *)(pkt_u + o + 0);