Commit ff540b76 authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

drm/ttm: add drm gem ttm helpers, starting with drm_gem_ttm_print_info() 



Now with ttm_buffer_object being a subclass of drm_gem_object we can
easily lookup ttm_buffer_object for a given drm_gem_object, which in
turn allows to create common helper functions.

This patch starts off with a drm_gem_ttm_print_info() helper function
which adds some ttm specific lines to the debug output.

Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Acked-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20190904054740.20817-3-kraxel@redhat.com
parent 2dc5d44c

Documentation/gpu/drm-mm.rst

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@@ -412,6 +412,18 @@ VRAM MM Helper Functions Reference 
.. kernel-doc:: drivers/gpu/drm/drm_vram_mm_helper.c

   :export:



GEM TTM Helper Functions Reference

-----------------------------------



.. kernel-doc:: drivers/gpu/drm/drm_gem_ttm_helper.c

   :doc: overview



.. kernel-doc:: include/drm/drm_gem_ttm_helper.h

   :internal:



.. kernel-doc:: drivers/gpu/drm/drm_gem_ttm_helper.c

   :export:



VMA Offset Manager

==================

drivers/gpu/drm/Kconfig

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@@ -172,6 +172,13 @@ config DRM_VRAM_HELPER 
	help

	  Helpers for VRAM memory management



config DRM_TTM_HELPER

	tristate

	depends on DRM

	select DRM_TTM

	help

	  Helpers for ttm-based gem objects



config DRM_GEM_CMA_HELPER

	bool

	depends on DRM

drivers/gpu/drm/Makefile

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@@ -37,6 +37,9 @@ drm_vram_helper-y := drm_gem_vram_helper.o \ 
		     drm_vram_mm_helper.o

obj-$(CONFIG_DRM_VRAM_HELPER) += drm_vram_helper.o



drm_ttm_helper-y := drm_gem_ttm_helper.o

obj-$(CONFIG_DRM_TTM_HELPER) += drm_ttm_helper.o



drm_kms_helper-y := drm_crtc_helper.o drm_dp_helper.o drm_dsc.o drm_probe_helper.o \

		drm_plane_helper.o drm_dp_mst_topology.o drm_atomic_helper.o \

		drm_kms_helper_common.o drm_dp_dual_mode_helper.o \

drivers/gpu/drm/drm_gem_ttm_helper.c

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// SPDX-License-Identifier: GPL-2.0-or-later



#include <linux/module.h>



#include <drm/drm_gem_ttm_helper.h>



/**

 * DOC: overview

 *

 * This library provides helper functions for gem objects backed by

 * ttm.

 */



/**

 * drm_gem_ttm_print_info() - Print &ttm_buffer_object info for debugfs

 * @p: DRM printer

 * @indent: Tab indentation level

 * @gem: GEM object

 *

 * This function can be used as &drm_gem_object_funcs.print_info

 * callback.

 */

void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,

			    const struct drm_gem_object *gem)

{

	static const char const *plname[] = {

		[ TTM_PL_SYSTEM ] = "system",

		[ TTM_PL_TT     ] = "tt",

		[ TTM_PL_VRAM   ] = "vram",

		[ TTM_PL_PRIV   ] = "priv",



		[ 16 ]            = "cached",

		[ 17 ]            = "uncached",

		[ 18 ]            = "wc",

		[ 19 ]            = "contig",



		[ 21 ]            = "pinned", /* NO_EVICT */

		[ 22 ]            = "topdown",

	};

	const struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);



	drm_printf_indent(p, indent, "placement=");

	drm_print_bits(p, bo->mem.placement, plname, 0, ARRAY_SIZE(plname));

	drm_printf(p, "\n");



	if (bo->mem.bus.is_iomem) {

		drm_printf_indent(p, indent, "bus.base=%lx\n",

				  (unsigned long)bo->mem.bus.base);

		drm_printf_indent(p, indent, "bus.offset=%lx\n",

				  (unsigned long)bo->mem.bus.offset);

	}

}

EXPORT_SYMBOL(drm_gem_ttm_print_info);



MODULE_DESCRIPTION("DRM gem ttm helpers");

MODULE_LICENSE("GPL");

include/drm/drm_gem_ttm_helper.h

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/* SPDX-License-Identifier: GPL-2.0-or-later */



#ifndef DRM_GEM_TTM_HELPER_H

#define DRM_GEM_TTM_HELPER_H



#include <linux/kernel.h>



#include <drm/drm_gem.h>

#include <drm/drm_device.h>

#include <drm/ttm/ttm_bo_api.h>

#include <drm/ttm/ttm_bo_driver.h>



#define drm_gem_ttm_of_gem(gem_obj) \

	container_of(gem_obj, struct ttm_buffer_object, base)



void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,

			    const struct drm_gem_object *gem);



#endif

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