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

4 files changed, 10 insertions, 10 deletions

diff --git a/drivers/gpu/drm/meson/Kconfig b/drivers/gpu/drm/meson/Kconfig
index 6c70fc3214af..823909da87db 100644
--- a/drivers/gpu/drm/meson/Kconfig
+++ b/drivers/gpu/drm/meson/Kconfig
@@ -4,7 +4,7 @@ config DRM_MESON
 	depends on DRM && OF && (ARM || ARM64)
 	depends on ARCH_MESON || COMPILE_TEST
 	select DRM_KMS_HELPER
-	select DRM_GEM_CMA_HELPER
+	select DRM_GEM_DMA_HELPER
 	select DRM_DISPLAY_CONNECTOR
 	select VIDEOMODE_HELPERS
 	select REGMAP_MMIO
diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c
index 1b70938cfd2c..ef386d7b9450 100644
--- a/drivers/gpu/drm/meson/meson_drv.c
+++ b/drivers/gpu/drm/meson/meson_drv.c
@@ -19,7 +19,7 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fb_helper.h>
-#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_modeset_helper_vtables.h>
 #include <drm/drm_module.h>
@@ -87,16 +87,16 @@ static int meson_dumb_create(struct drm_file *file, struct drm_device *dev,
 	args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), SZ_64);
 	args->size = PAGE_ALIGN(args->pitch * args->height);
 
-	return drm_gem_cma_dumb_create_internal(file, dev, args);
+	return drm_gem_dma_dumb_create_internal(file, dev, args);
 }
 
-DEFINE_DRM_GEM_CMA_FOPS(fops);
+DEFINE_DRM_GEM_DMA_FOPS(fops);
 
 static const struct drm_driver meson_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 
-	/* CMA Ops */
-	DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(meson_dumb_create),
+	/* DMA Ops */
+	DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(meson_dumb_create),
 
 	/* Misc */
 	.fops			= &fops,
diff --git a/drivers/gpu/drm/meson/meson_overlay.c b/drivers/gpu/drm/meson/meson_overlay.c
index bfebf45d8402..9d3ab4a80b1c 100644
--- a/drivers/gpu/drm/meson/meson_overlay.c
+++ b/drivers/gpu/drm/meson/meson_overlay.c
@@ -15,7 +15,7 @@
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_atomic_helper.h>
-#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_dma_helper.h>
 
 #include "meson_overlay.h"
 #include "meson_registers.h"
@@ -476,7 +476,7 @@ static void meson_overlay_atomic_update(struct drm_plane *plane,
 									   plane);
 	struct drm_framebuffer *fb = new_state->fb;
 	struct meson_drm *priv = meson_overlay->priv;
-	struct drm_gem_cma_object *gem;
+	struct drm_gem_dma_object *gem;
 	unsigned long flags;
 	bool interlace_mode;
 
diff --git a/drivers/gpu/drm/meson/meson_plane.c b/drivers/gpu/drm/meson/meson_plane.c
index 51479715cce7..f7b9f63a1e70 100644
--- a/drivers/gpu/drm/meson/meson_plane.c
+++ b/drivers/gpu/drm/meson/meson_plane.c
@@ -19,7 +19,7 @@
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_atomic_helper.h>
-#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_dma_helper.h>
 
 #include "meson_plane.h"
 #include "meson_registers.h"
@@ -139,7 +139,7 @@ static void meson_plane_atomic_update(struct drm_plane *plane,
 	struct drm_rect dest = drm_plane_state_dest(new_state);
 	struct meson_drm *priv = meson_plane->priv;
 	struct drm_framebuffer *fb = new_state->fb;
-	struct drm_gem_cma_object *gem;
+	struct drm_gem_dma_object *gem;
 	unsigned long flags;
 	int vsc_ini_rcv_num, vsc_ini_rpt_p0_num;
 	int vsc_bot_rcv_num, vsc_bot_rpt_p0_num;