drm/r128: make ATI PCI GART part of its only user, r128

The ATI Rage 128 driver has been the only user of ATI PCI GART code
since Radeon dropped UMS support in commit 8333f607a631 ("drm/radeon:
remove UMS support"). Clean up the drm top level directory, Kconfig and
Makefile by making ati_pcigart.[ch] part of r128. Drop the
CONFIG_DRM_ATI_PCIGART config option made redundant by the change.

This reduces drm.ko module size slightly when legacy drivers are
enabled, and moves the baggage to r128.ko instead.

Cc: Alex Deucher <[e-mail]>
Cc: Daniel Vetter <[e-mail]>
Cc: Dave Airlie <[e-mail]>
Reviewed-by: Daniel Vetter <[e-mail]>
Reviewed-by: Alex Deucher <[e-mail]>
Signed-off-by: Jani Nikula <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/Kconfig

···
 
 	  If M is selected the module will be called vkms.
 
-config DRM_ATI_PCIGART
-        bool
-
 source "drivers/gpu/drm/exynos/Kconfig"
 
 source "drivers/gpu/drm/rockchip/Kconfig"
···
 	bool "Enable legacy drivers (DANGEROUS)"
 	depends on DRM && MMU
 	select DRM_VM
-	select DRM_ATI_PCIGART if PCI
 	help
 	  Enable legacy DRI1 drivers. Those drivers expose unsafe and dangerous
 	  APIs to user-space, which can be used to circumvent access

drivers/gpu/drm/Makefile

···
 drm-$(CONFIG_COMPAT) += drm_ioc32.o
 drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
 drm-$(CONFIG_DRM_GEM_SHMEM_HELPER) += drm_gem_shmem_helper.o
-drm-$(CONFIG_DRM_ATI_PCIGART) += ati_pcigart.o
 drm-$(CONFIG_DRM_PANEL) += drm_panel.o
 drm-$(CONFIG_OF) += drm_of.o
 drm-$(CONFIG_AGP) += drm_agpsupport.o

drivers/gpu/drm/ati_pcigart.c drivers/gpu/drm/r128/ati_pcigart.c

···
 
 #include <linux/export.h>
 
-#include <drm/ati_pcigart.h>
 #include <drm/drm_device.h>
 #include <drm/drm_pci.h>
 #include <drm/drm_print.h>
+
+#include "ati_pcigart.h"
 
 # define ATI_PCIGART_PAGE_SIZE		4096	/**< PCI GART page size */
 
···
 
 	return 1;
 }
-EXPORT_SYMBOL(drm_ati_pcigart_cleanup);
 
 int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
 {
···
 	gart_info->bus_addr = bus_address;
 	return ret;
 }
-EXPORT_SYMBOL(drm_ati_pcigart_init);

drivers/gpu/drm/r128/Makefile

···
 # Makefile for the drm device driver.  This driver provides support for the
 # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
 
-r128-y   := r128_drv.o r128_cce.o r128_state.o r128_irq.o
+r128-y   := r128_drv.o r128_cce.o r128_state.o r128_irq.o ati_pcigart.o
 
 r128-$(CONFIG_COMPAT)   += r128_ioc32.o
 

drivers/gpu/drm/r128/r128_drv.h

···
 #include <linux/io.h>
 #include <linux/irqreturn.h>
 
-#include <drm/ati_pcigart.h>
 #include <drm/drm_ioctl.h>
 #include <drm/drm_legacy.h>
 #include <drm/r128_drm.h>
+
+#include "ati_pcigart.h"
 
 /* General customization:
  */