Commit ff540b76 authored by Gerd Hoffmann's avatar Gerd Hoffmann

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
......@@ -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
==================
......
......@@ -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
......
......@@ -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 \
......
// 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");
/* 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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